2765 lines
97 KiB
C++
2765 lines
97 KiB
C++
//===-- llvm/CodeGen/DwarfDebug.cpp - Dwarf Debug Framework ---------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains support for writing dwarf debug info into asm files.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "dwarfdebug"
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#include "DwarfDebug.h"
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#include "DIE.h"
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#include "DwarfCompileUnit.h"
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#include "llvm/Constants.h"
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#include "llvm/Module.h"
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#include "llvm/Instructions.h"
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#include "llvm/CodeGen/MachineFunction.h"
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#include "llvm/CodeGen/MachineModuleInfo.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCSection.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Target/Mangler.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/Target/TargetFrameLowering.h"
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#include "llvm/Target/TargetLoweringObjectFile.h"
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#include "llvm/Target/TargetMachine.h"
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#include "llvm/Target/TargetRegisterInfo.h"
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#include "llvm/Target/TargetOptions.h"
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#include "llvm/Analysis/DebugInfo.h"
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#include "llvm/Analysis/DIBuilder.h"
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#include "llvm/ADT/Statistic.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/ValueHandle.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/Support/Timer.h"
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#include "llvm/Support/Path.h"
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using namespace llvm;
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static cl::opt<bool> PrintDbgScope("print-dbgscope", cl::Hidden,
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cl::desc("Print DbgScope information for each machine instruction"));
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static cl::opt<bool> DisableDebugInfoPrinting("disable-debug-info-print",
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cl::Hidden,
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cl::desc("Disable debug info printing"));
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static cl::opt<bool> UnknownLocations("use-unknown-locations", cl::Hidden,
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cl::desc("Make an absence of debug location information explicit."),
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cl::init(false));
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namespace {
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const char *DWARFGroupName = "DWARF Emission";
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const char *DbgTimerName = "DWARF Debug Writer";
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} // end anonymous namespace
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//===----------------------------------------------------------------------===//
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/// Configuration values for initial hash set sizes (log2).
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///
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static const unsigned InitAbbreviationsSetSize = 9; // log2(512)
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namespace llvm {
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DIType DbgVariable::getType() const {
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DIType Ty = Var.getType();
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// FIXME: isBlockByrefVariable should be reformulated in terms of complex
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// addresses instead.
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if (Var.isBlockByrefVariable()) {
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/* Byref variables, in Blocks, are declared by the programmer as
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"SomeType VarName;", but the compiler creates a
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__Block_byref_x_VarName struct, and gives the variable VarName
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either the struct, or a pointer to the struct, as its type. This
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is necessary for various behind-the-scenes things the compiler
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needs to do with by-reference variables in blocks.
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However, as far as the original *programmer* is concerned, the
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variable should still have type 'SomeType', as originally declared.
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The following function dives into the __Block_byref_x_VarName
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struct to find the original type of the variable. This will be
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passed back to the code generating the type for the Debug
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Information Entry for the variable 'VarName'. 'VarName' will then
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have the original type 'SomeType' in its debug information.
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The original type 'SomeType' will be the type of the field named
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'VarName' inside the __Block_byref_x_VarName struct.
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NOTE: In order for this to not completely fail on the debugger
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side, the Debug Information Entry for the variable VarName needs to
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have a DW_AT_location that tells the debugger how to unwind through
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the pointers and __Block_byref_x_VarName struct to find the actual
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value of the variable. The function addBlockByrefType does this. */
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DIType subType = Ty;
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unsigned tag = Ty.getTag();
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if (tag == dwarf::DW_TAG_pointer_type) {
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DIDerivedType DTy = DIDerivedType(Ty);
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subType = DTy.getTypeDerivedFrom();
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}
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DICompositeType blockStruct = DICompositeType(subType);
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DIArray Elements = blockStruct.getTypeArray();
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for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
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DIDescriptor Element = Elements.getElement(i);
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DIDerivedType DT = DIDerivedType(Element);
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if (getName() == DT.getName())
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return (DT.getTypeDerivedFrom());
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}
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return Ty;
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}
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return Ty;
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}
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//===----------------------------------------------------------------------===//
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/// DbgRange - This is used to track range of instructions with identical
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/// debug info scope.
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///
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typedef std::pair<const MachineInstr *, const MachineInstr *> DbgRange;
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//===----------------------------------------------------------------------===//
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/// DbgScope - This class is used to track scope information.
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///
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class DbgScope {
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DbgScope *Parent; // Parent to this scope.
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DIDescriptor Desc; // Debug info descriptor for scope.
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// Location at which this scope is inlined.
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AssertingVH<const MDNode> InlinedAtLocation;
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bool AbstractScope; // Abstract Scope
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const MachineInstr *LastInsn; // Last instruction of this scope.
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const MachineInstr *FirstInsn; // First instruction of this scope.
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unsigned DFSIn, DFSOut;
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// Scopes defined in scope. Contents not owned.
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SmallVector<DbgScope *, 4> Scopes;
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// Variables declared in scope. Contents owned.
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SmallVector<DbgVariable *, 8> Variables;
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SmallVector<DbgRange, 4> Ranges;
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// Private state for dump()
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mutable unsigned IndentLevel;
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public:
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DbgScope(DbgScope *P, DIDescriptor D, const MDNode *I = 0)
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: Parent(P), Desc(D), InlinedAtLocation(I), AbstractScope(false),
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LastInsn(0), FirstInsn(0),
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DFSIn(0), DFSOut(0), IndentLevel(0) {}
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virtual ~DbgScope();
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// Accessors.
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DbgScope *getParent() const { return Parent; }
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void setParent(DbgScope *P) { Parent = P; }
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DIDescriptor getDesc() const { return Desc; }
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const MDNode *getInlinedAt() const { return InlinedAtLocation; }
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const MDNode *getScopeNode() const { return Desc; }
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const SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
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const SmallVector<DbgVariable *, 8> &getDbgVariables() { return Variables; }
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const SmallVector<DbgRange, 4> &getRanges() { return Ranges; }
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/// openInsnRange - This scope covers instruction range starting from MI.
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void openInsnRange(const MachineInstr *MI) {
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if (!FirstInsn)
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FirstInsn = MI;
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if (Parent)
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Parent->openInsnRange(MI);
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}
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/// extendInsnRange - Extend the current instruction range covered by
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/// this scope.
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void extendInsnRange(const MachineInstr *MI) {
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assert (FirstInsn && "MI Range is not open!");
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LastInsn = MI;
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if (Parent)
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Parent->extendInsnRange(MI);
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}
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/// closeInsnRange - Create a range based on FirstInsn and LastInsn collected
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/// until now. This is used when a new scope is encountered while walking
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/// machine instructions.
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void closeInsnRange(DbgScope *NewScope = NULL) {
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assert (LastInsn && "Last insn missing!");
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Ranges.push_back(DbgRange(FirstInsn, LastInsn));
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FirstInsn = NULL;
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LastInsn = NULL;
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// If Parent dominates NewScope then do not close Parent's instruction
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// range.
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if (Parent && (!NewScope || !Parent->dominates(NewScope)))
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Parent->closeInsnRange(NewScope);
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}
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void setAbstractScope() { AbstractScope = true; }
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bool isAbstractScope() const { return AbstractScope; }
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// Depth First Search support to walk and mainpluate DbgScope hierarchy.
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unsigned getDFSOut() const { return DFSOut; }
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void setDFSOut(unsigned O) { DFSOut = O; }
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unsigned getDFSIn() const { return DFSIn; }
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void setDFSIn(unsigned I) { DFSIn = I; }
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bool dominates(const DbgScope *S) {
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if (S == this)
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return true;
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if (DFSIn < S->getDFSIn() && DFSOut > S->getDFSOut())
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return true;
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return false;
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}
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/// addScope - Add a scope to the scope.
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///
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void addScope(DbgScope *S) { Scopes.push_back(S); }
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/// addVariable - Add a variable to the scope.
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///
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void addVariable(DbgVariable *V) { Variables.push_back(V); }
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#ifndef NDEBUG
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void dump() const;
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#endif
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};
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} // end llvm namespace
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#ifndef NDEBUG
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void DbgScope::dump() const {
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raw_ostream &err = dbgs();
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err.indent(IndentLevel);
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const MDNode *N = Desc;
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N->dump();
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if (AbstractScope)
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err << "Abstract Scope\n";
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IndentLevel += 2;
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if (!Scopes.empty())
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err << "Children ...\n";
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for (unsigned i = 0, e = Scopes.size(); i != e; ++i)
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if (Scopes[i] != this)
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Scopes[i]->dump();
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IndentLevel -= 2;
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}
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#endif
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DbgScope::~DbgScope() {
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for (unsigned j = 0, M = Variables.size(); j < M; ++j)
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delete Variables[j];
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}
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DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M)
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: Asm(A), MMI(Asm->MMI), FirstCU(0),
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AbbreviationsSet(InitAbbreviationsSetSize),
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CurrentFnDbgScope(0), PrevLabel(NULL) {
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NextStringPoolNumber = 0;
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DwarfInfoSectionSym = DwarfAbbrevSectionSym = 0;
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DwarfStrSectionSym = TextSectionSym = 0;
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DwarfDebugRangeSectionSym = DwarfDebugLocSectionSym = 0;
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FunctionBeginSym = FunctionEndSym = 0;
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{
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NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled);
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beginModule(M);
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}
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}
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DwarfDebug::~DwarfDebug() {
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}
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MCSymbol *DwarfDebug::getStringPoolEntry(StringRef Str) {
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std::pair<MCSymbol*, unsigned> &Entry = StringPool[Str];
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if (Entry.first) return Entry.first;
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Entry.second = NextStringPoolNumber++;
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return Entry.first = Asm->GetTempSymbol("string", Entry.second);
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}
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/// assignAbbrevNumber - Define a unique number for the abbreviation.
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///
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void DwarfDebug::assignAbbrevNumber(DIEAbbrev &Abbrev) {
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// Profile the node so that we can make it unique.
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FoldingSetNodeID ID;
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Abbrev.Profile(ID);
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// Check the set for priors.
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DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
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// If it's newly added.
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if (InSet == &Abbrev) {
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// Add to abbreviation list.
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Abbreviations.push_back(&Abbrev);
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// Assign the vector position + 1 as its number.
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Abbrev.setNumber(Abbreviations.size());
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} else {
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// Assign existing abbreviation number.
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Abbrev.setNumber(InSet->getNumber());
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}
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}
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/// getRealLinkageName - If special LLVM prefix that is used to inform the asm
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/// printer to not emit usual symbol prefix before the symbol name is used then
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/// return linkage name after skipping this special LLVM prefix.
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static StringRef getRealLinkageName(StringRef LinkageName) {
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char One = '\1';
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if (LinkageName.startswith(StringRef(&One, 1)))
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return LinkageName.substr(1);
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return LinkageName;
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}
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/// createSubprogramDIE - Create new DIE using SP.
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DIE *DwarfDebug::createSubprogramDIE(DISubprogram SP) {
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CompileUnit *SPCU = getCompileUnit(SP);
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DIE *SPDie = SPCU->getDIE(SP);
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if (SPDie)
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return SPDie;
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SPDie = new DIE(dwarf::DW_TAG_subprogram);
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// DW_TAG_inlined_subroutine may refer to this DIE.
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SPCU->insertDIE(SP, SPDie);
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// Add to context owner.
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SPCU->addToContextOwner(SPDie, SP.getContext());
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// Add function template parameters.
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SPCU->addTemplateParams(*SPDie, SP.getTemplateParams());
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StringRef LinkageName = SP.getLinkageName();
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if (!LinkageName.empty())
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SPCU->addString(SPDie, dwarf::DW_AT_MIPS_linkage_name, dwarf::DW_FORM_string,
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getRealLinkageName(LinkageName));
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// If this DIE is going to refer declaration info using AT_specification
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// then there is no need to add other attributes.
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if (SP.getFunctionDeclaration().isSubprogram())
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return SPDie;
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// Constructors and operators for anonymous aggregates do not have names.
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if (!SP.getName().empty())
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SPCU->addString(SPDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
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SP.getName());
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SPCU->addSourceLine(SPDie, SP);
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if (SP.isPrototyped())
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SPCU->addUInt(SPDie, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1);
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// Add Return Type.
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DICompositeType SPTy = SP.getType();
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DIArray Args = SPTy.getTypeArray();
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unsigned SPTag = SPTy.getTag();
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if (Args.getNumElements() == 0 || SPTag != dwarf::DW_TAG_subroutine_type)
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SPCU->addType(SPDie, SPTy);
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else
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SPCU->addType(SPDie, DIType(Args.getElement(0)));
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unsigned VK = SP.getVirtuality();
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if (VK) {
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SPCU->addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, VK);
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DIEBlock *Block = SPCU->getDIEBlock();
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SPCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
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SPCU->addUInt(Block, 0, dwarf::DW_FORM_udata, SP.getVirtualIndex());
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SPCU->addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block);
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ContainingTypeMap.insert(std::make_pair(SPDie,
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SP.getContainingType()));
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}
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if (!SP.isDefinition()) {
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SPCU->addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
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// Add arguments. Do not add arguments for subprogram definition. They will
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// be handled while processing variables.
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DICompositeType SPTy = SP.getType();
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DIArray Args = SPTy.getTypeArray();
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unsigned SPTag = SPTy.getTag();
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if (SPTag == dwarf::DW_TAG_subroutine_type)
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for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
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DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
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DIType ATy = DIType(DIType(Args.getElement(i)));
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SPCU->addType(Arg, ATy);
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if (ATy.isArtificial())
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SPCU->addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
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SPDie->addChild(Arg);
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}
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}
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if (SP.isArtificial())
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SPCU->addUInt(SPDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
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if (!SP.isLocalToUnit())
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SPCU->addUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
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if (SP.isOptimized())
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SPCU->addUInt(SPDie, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
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if (unsigned isa = Asm->getISAEncoding()) {
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SPCU->addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
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}
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return SPDie;
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}
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DbgScope *DwarfDebug::getOrCreateAbstractScope(const MDNode *N) {
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assert(N && "Invalid Scope encoding!");
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DbgScope *AScope = AbstractScopes.lookup(N);
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if (AScope)
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return AScope;
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DbgScope *Parent = NULL;
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DIDescriptor Scope(N);
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if (Scope.isLexicalBlock()) {
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DILexicalBlock DB(N);
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DIDescriptor ParentDesc = DB.getContext();
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Parent = getOrCreateAbstractScope(ParentDesc);
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}
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AScope = new DbgScope(Parent, DIDescriptor(N), NULL);
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if (Parent)
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Parent->addScope(AScope);
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AScope->setAbstractScope();
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AbstractScopes[N] = AScope;
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if (DIDescriptor(N).isSubprogram())
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AbstractScopesList.push_back(AScope);
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return AScope;
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}
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/// isSubprogramContext - Return true if Context is either a subprogram
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/// or another context nested inside a subprogram.
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static bool isSubprogramContext(const MDNode *Context) {
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if (!Context)
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return false;
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DIDescriptor D(Context);
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if (D.isSubprogram())
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return true;
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if (D.isType())
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return isSubprogramContext(DIType(Context).getContext());
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return false;
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}
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/// updateSubprogramScopeDIE - Find DIE for the given subprogram and
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/// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes.
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/// If there are global variables in this scope then create and insert
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/// DIEs for these variables.
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DIE *DwarfDebug::updateSubprogramScopeDIE(const MDNode *SPNode) {
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CompileUnit *SPCU = getCompileUnit(SPNode);
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DIE *SPDie = SPCU->getDIE(SPNode);
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assert(SPDie && "Unable to find subprogram DIE!");
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DISubprogram SP(SPNode);
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DISubprogram SPDecl = SP.getFunctionDeclaration();
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if (SPDecl.isSubprogram())
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// Refer function declaration directly.
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SPCU->addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
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createSubprogramDIE(SPDecl));
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else {
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// There is not any need to generate specification DIE for a function
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// defined at compile unit level. If a function is defined inside another
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// function then gdb prefers the definition at top level and but does not
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// expect specification DIE in parent function. So avoid creating
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// specification DIE for a function defined inside a function.
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if (SP.isDefinition() && !SP.getContext().isCompileUnit() &&
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!SP.getContext().isFile() &&
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!isSubprogramContext(SP.getContext())) {
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SPCU-> addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
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// Add arguments.
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DICompositeType SPTy = SP.getType();
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DIArray Args = SPTy.getTypeArray();
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|
unsigned SPTag = SPTy.getTag();
|
|
if (SPTag == dwarf::DW_TAG_subroutine_type)
|
|
for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
|
|
DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
|
|
DIType ATy = DIType(DIType(Args.getElement(i)));
|
|
SPCU->addType(Arg, ATy);
|
|
if (ATy.isArtificial())
|
|
SPCU->addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1);
|
|
SPDie->addChild(Arg);
|
|
}
|
|
DIE *SPDeclDie = SPDie;
|
|
SPDie = new DIE(dwarf::DW_TAG_subprogram);
|
|
SPCU->addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
|
|
SPDeclDie);
|
|
SPCU->addDie(SPDie);
|
|
}
|
|
}
|
|
// Pick up abstract subprogram DIE.
|
|
if (DIE *AbsSPDIE = AbstractSPDies.lookup(SPNode)) {
|
|
SPDie = new DIE(dwarf::DW_TAG_subprogram);
|
|
SPCU->addDIEEntry(SPDie, dwarf::DW_AT_abstract_origin,
|
|
dwarf::DW_FORM_ref4, AbsSPDIE);
|
|
SPCU->addDie(SPDie);
|
|
}
|
|
|
|
SPCU->addLabel(SPDie, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr,
|
|
Asm->GetTempSymbol("func_begin", Asm->getFunctionNumber()));
|
|
SPCU->addLabel(SPDie, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr,
|
|
Asm->GetTempSymbol("func_end", Asm->getFunctionNumber()));
|
|
const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
|
|
MachineLocation Location(RI->getFrameRegister(*Asm->MF));
|
|
SPCU->addAddress(SPDie, dwarf::DW_AT_frame_base, Location);
|
|
|
|
return SPDie;
|
|
}
|
|
|
|
/// constructLexicalScope - Construct new DW_TAG_lexical_block
|
|
/// for this scope and attach DW_AT_low_pc/DW_AT_high_pc labels.
|
|
DIE *DwarfDebug::constructLexicalScopeDIE(DbgScope *Scope) {
|
|
|
|
DIE *ScopeDIE = new DIE(dwarf::DW_TAG_lexical_block);
|
|
if (Scope->isAbstractScope())
|
|
return ScopeDIE;
|
|
|
|
const SmallVector<DbgRange, 4> &Ranges = Scope->getRanges();
|
|
if (Ranges.empty())
|
|
return 0;
|
|
|
|
CompileUnit *TheCU = getCompileUnit(Scope->getScopeNode());
|
|
SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin();
|
|
if (Ranges.size() > 1) {
|
|
// .debug_range section has not been laid out yet. Emit offset in
|
|
// .debug_range as a uint, size 4, for now. emitDIE will handle
|
|
// DW_AT_ranges appropriately.
|
|
TheCU->addUInt(ScopeDIE, dwarf::DW_AT_ranges, dwarf::DW_FORM_data4,
|
|
DebugRangeSymbols.size() * Asm->getTargetData().getPointerSize());
|
|
for (SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(),
|
|
RE = Ranges.end(); RI != RE; ++RI) {
|
|
DebugRangeSymbols.push_back(getLabelBeforeInsn(RI->first));
|
|
DebugRangeSymbols.push_back(getLabelAfterInsn(RI->second));
|
|
}
|
|
DebugRangeSymbols.push_back(NULL);
|
|
DebugRangeSymbols.push_back(NULL);
|
|
return ScopeDIE;
|
|
}
|
|
|
|
const MCSymbol *Start = getLabelBeforeInsn(RI->first);
|
|
const MCSymbol *End = getLabelAfterInsn(RI->second);
|
|
|
|
if (End == 0) return 0;
|
|
|
|
assert(Start->isDefined() && "Invalid starting label for an inlined scope!");
|
|
assert(End->isDefined() && "Invalid end label for an inlined scope!");
|
|
|
|
TheCU->addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, Start);
|
|
TheCU->addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, End);
|
|
|
|
return ScopeDIE;
|
|
}
|
|
|
|
/// constructInlinedScopeDIE - This scope represents inlined body of
|
|
/// a function. Construct DIE to represent this concrete inlined copy
|
|
/// of the function.
|
|
DIE *DwarfDebug::constructInlinedScopeDIE(DbgScope *Scope) {
|
|
|
|
const SmallVector<DbgRange, 4> &Ranges = Scope->getRanges();
|
|
assert (Ranges.empty() == false
|
|
&& "DbgScope does not have instruction markers!");
|
|
|
|
// FIXME : .debug_inlined section specification does not clearly state how
|
|
// to emit inlined scope that is split into multiple instruction ranges.
|
|
// For now, use first instruction range and emit low_pc/high_pc pair and
|
|
// corresponding .debug_inlined section entry for this pair.
|
|
SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin();
|
|
const MCSymbol *StartLabel = getLabelBeforeInsn(RI->first);
|
|
const MCSymbol *EndLabel = getLabelAfterInsn(RI->second);
|
|
|
|
if (StartLabel == 0 || EndLabel == 0) {
|
|
assert (0 && "Unexpected Start and End labels for a inlined scope!");
|
|
return 0;
|
|
}
|
|
assert(StartLabel->isDefined() &&
|
|
"Invalid starting label for an inlined scope!");
|
|
assert(EndLabel->isDefined() &&
|
|
"Invalid end label for an inlined scope!");
|
|
|
|
if (!Scope->getScopeNode())
|
|
return NULL;
|
|
DIScope DS(Scope->getScopeNode());
|
|
DISubprogram InlinedSP = getDISubprogram(DS);
|
|
CompileUnit *TheCU = getCompileUnit(InlinedSP);
|
|
DIE *OriginDIE = TheCU->getDIE(InlinedSP);
|
|
if (!OriginDIE) {
|
|
DEBUG(dbgs() << "Unable to find original DIE for inlined subprogram.");
|
|
return NULL;
|
|
}
|
|
DIE *ScopeDIE = new DIE(dwarf::DW_TAG_inlined_subroutine);
|
|
TheCU->addDIEEntry(ScopeDIE, dwarf::DW_AT_abstract_origin,
|
|
dwarf::DW_FORM_ref4, OriginDIE);
|
|
|
|
TheCU->addLabel(ScopeDIE, dwarf::DW_AT_low_pc, dwarf::DW_FORM_addr, StartLabel);
|
|
TheCU->addLabel(ScopeDIE, dwarf::DW_AT_high_pc, dwarf::DW_FORM_addr, EndLabel);
|
|
|
|
InlinedSubprogramDIEs.insert(OriginDIE);
|
|
|
|
// Track the start label for this inlined function.
|
|
DenseMap<const MDNode *, SmallVector<InlineInfoLabels, 4> >::iterator
|
|
I = InlineInfo.find(InlinedSP);
|
|
|
|
if (I == InlineInfo.end()) {
|
|
InlineInfo[InlinedSP].push_back(std::make_pair(StartLabel,
|
|
ScopeDIE));
|
|
InlinedSPNodes.push_back(InlinedSP);
|
|
} else
|
|
I->second.push_back(std::make_pair(StartLabel, ScopeDIE));
|
|
|
|
DILocation DL(Scope->getInlinedAt());
|
|
TheCU->addUInt(ScopeDIE, dwarf::DW_AT_call_file, 0, TheCU->getID());
|
|
TheCU->addUInt(ScopeDIE, dwarf::DW_AT_call_line, 0, DL.getLineNumber());
|
|
|
|
return ScopeDIE;
|
|
}
|
|
|
|
|
|
/// constructVariableDIE - Construct a DIE for the given DbgVariable.
|
|
DIE *DwarfDebug::constructVariableDIE(DbgVariable *DV, DbgScope *Scope) {
|
|
StringRef Name = DV->getName();
|
|
if (Name.empty())
|
|
return NULL;
|
|
|
|
// Translate tag to proper Dwarf tag. The result variable is dropped for
|
|
// now.
|
|
unsigned Tag;
|
|
switch (DV->getTag()) {
|
|
case dwarf::DW_TAG_return_variable:
|
|
return NULL;
|
|
case dwarf::DW_TAG_arg_variable:
|
|
Tag = dwarf::DW_TAG_formal_parameter;
|
|
break;
|
|
case dwarf::DW_TAG_auto_variable: // fall thru
|
|
default:
|
|
Tag = dwarf::DW_TAG_variable;
|
|
break;
|
|
}
|
|
|
|
// Define variable debug information entry.
|
|
DIE *VariableDie = new DIE(Tag);
|
|
CompileUnit *VariableCU = getCompileUnit(DV->getVariable());
|
|
DIE *AbsDIE = NULL;
|
|
DenseMap<const DbgVariable *, const DbgVariable *>::iterator
|
|
V2AVI = VarToAbstractVarMap.find(DV);
|
|
if (V2AVI != VarToAbstractVarMap.end())
|
|
AbsDIE = V2AVI->second->getDIE();
|
|
|
|
if (AbsDIE)
|
|
VariableCU->addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin,
|
|
dwarf::DW_FORM_ref4, AbsDIE);
|
|
else {
|
|
VariableCU->addString(VariableDie, dwarf::DW_AT_name, dwarf::DW_FORM_string,
|
|
Name);
|
|
VariableCU->addSourceLine(VariableDie, DV->getVariable());
|
|
|
|
// Add variable type.
|
|
VariableCU->addType(VariableDie, DV->getType());
|
|
}
|
|
|
|
if (Tag == dwarf::DW_TAG_formal_parameter && DV->getType().isArtificial())
|
|
VariableCU->addUInt(VariableDie, dwarf::DW_AT_artificial,
|
|
dwarf::DW_FORM_flag, 1);
|
|
else if (DIVariable(DV->getVariable()).isArtificial())
|
|
VariableCU->addUInt(VariableDie, dwarf::DW_AT_artificial,
|
|
dwarf::DW_FORM_flag, 1);
|
|
|
|
if (Scope->isAbstractScope()) {
|
|
DV->setDIE(VariableDie);
|
|
return VariableDie;
|
|
}
|
|
|
|
// Add variable address.
|
|
|
|
unsigned Offset = DV->getDotDebugLocOffset();
|
|
if (Offset != ~0U) {
|
|
VariableCU->addLabel(VariableDie, dwarf::DW_AT_location, dwarf::DW_FORM_data4,
|
|
Asm->GetTempSymbol("debug_loc", Offset));
|
|
DV->setDIE(VariableDie);
|
|
UseDotDebugLocEntry.insert(VariableDie);
|
|
return VariableDie;
|
|
}
|
|
|
|
// Check if variable is described by a DBG_VALUE instruction.
|
|
DenseMap<const DbgVariable *, const MachineInstr *>::iterator DVI =
|
|
DbgVariableToDbgInstMap.find(DV);
|
|
if (DVI != DbgVariableToDbgInstMap.end()) {
|
|
const MachineInstr *DVInsn = DVI->second;
|
|
bool updated = false;
|
|
// FIXME : Handle getNumOperands != 3
|
|
if (DVInsn->getNumOperands() == 3) {
|
|
if (DVInsn->getOperand(0).isReg()) {
|
|
const MachineOperand RegOp = DVInsn->getOperand(0);
|
|
const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
|
|
if (DVInsn->getOperand(1).isImm() &&
|
|
TRI->getFrameRegister(*Asm->MF) == RegOp.getReg()) {
|
|
unsigned FrameReg = 0;
|
|
const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
|
|
int Offset =
|
|
TFI->getFrameIndexReference(*Asm->MF,
|
|
DVInsn->getOperand(1).getImm(),
|
|
FrameReg);
|
|
MachineLocation Location(FrameReg, Offset);
|
|
VariableCU->addVariableAddress(DV, VariableDie, Location);
|
|
|
|
} else if (RegOp.getReg())
|
|
VariableCU->addVariableAddress(DV, VariableDie,
|
|
MachineLocation(RegOp.getReg()));
|
|
updated = true;
|
|
}
|
|
else if (DVInsn->getOperand(0).isImm())
|
|
updated =
|
|
VariableCU->addConstantValue(VariableDie, DVInsn->getOperand(0),
|
|
DV->getType());
|
|
else if (DVInsn->getOperand(0).isFPImm())
|
|
updated =
|
|
VariableCU->addConstantFPValue(VariableDie, DVInsn->getOperand(0));
|
|
} else {
|
|
VariableCU->addVariableAddress(DV, VariableDie,
|
|
Asm->getDebugValueLocation(DVInsn));
|
|
updated = true;
|
|
}
|
|
if (!updated) {
|
|
// If variableDie is not updated then DBG_VALUE instruction does not
|
|
// have valid variable info.
|
|
delete VariableDie;
|
|
return NULL;
|
|
}
|
|
DV->setDIE(VariableDie);
|
|
return VariableDie;
|
|
}
|
|
|
|
// .. else use frame index, if available.
|
|
int FI = 0;
|
|
if (findVariableFrameIndex(DV, &FI)) {
|
|
unsigned FrameReg = 0;
|
|
const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
|
|
int Offset =
|
|
TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
|
|
MachineLocation Location(FrameReg, Offset);
|
|
VariableCU->addVariableAddress(DV, VariableDie, Location);
|
|
}
|
|
|
|
DV->setDIE(VariableDie);
|
|
return VariableDie;
|
|
|
|
}
|
|
|
|
/// constructScopeDIE - Construct a DIE for this scope.
|
|
DIE *DwarfDebug::constructScopeDIE(DbgScope *Scope) {
|
|
if (!Scope || !Scope->getScopeNode())
|
|
return NULL;
|
|
|
|
SmallVector <DIE *, 8> Children;
|
|
|
|
// Collect arguments for current function.
|
|
if (Scope == CurrentFnDbgScope)
|
|
for (unsigned i = 0, N = CurrentFnArguments.size(); i < N; ++i)
|
|
if (DbgVariable *ArgDV = CurrentFnArguments[i])
|
|
if (DIE *Arg = constructVariableDIE(ArgDV, Scope))
|
|
Children.push_back(Arg);
|
|
|
|
// Collect lexical scope childrens first.
|
|
const SmallVector<DbgVariable *, 8> &Variables = Scope->getDbgVariables();
|
|
for (unsigned i = 0, N = Variables.size(); i < N; ++i)
|
|
if (DIE *Variable = constructVariableDIE(Variables[i], Scope))
|
|
Children.push_back(Variable);
|
|
const SmallVector<DbgScope *, 4> &Scopes = Scope->getScopes();
|
|
for (unsigned j = 0, M = Scopes.size(); j < M; ++j)
|
|
if (DIE *Nested = constructScopeDIE(Scopes[j]))
|
|
Children.push_back(Nested);
|
|
DIScope DS(Scope->getScopeNode());
|
|
DIE *ScopeDIE = NULL;
|
|
if (Scope->getInlinedAt())
|
|
ScopeDIE = constructInlinedScopeDIE(Scope);
|
|
else if (DS.isSubprogram()) {
|
|
ProcessedSPNodes.insert(DS);
|
|
if (Scope->isAbstractScope()) {
|
|
ScopeDIE = getCompileUnit(DS)->getDIE(DS);
|
|
// Note down abstract DIE.
|
|
if (ScopeDIE)
|
|
AbstractSPDies.insert(std::make_pair(DS, ScopeDIE));
|
|
}
|
|
else
|
|
ScopeDIE = updateSubprogramScopeDIE(DS);
|
|
}
|
|
else {
|
|
// There is no need to emit empty lexical block DIE.
|
|
if (Children.empty())
|
|
return NULL;
|
|
ScopeDIE = constructLexicalScopeDIE(Scope);
|
|
}
|
|
|
|
if (!ScopeDIE) return NULL;
|
|
|
|
// Add children
|
|
for (SmallVector<DIE *, 8>::iterator I = Children.begin(),
|
|
E = Children.end(); I != E; ++I)
|
|
ScopeDIE->addChild(*I);
|
|
|
|
if (DS.isSubprogram())
|
|
getCompileUnit(DS)->addPubTypes(DISubprogram(DS));
|
|
|
|
return ScopeDIE;
|
|
}
|
|
|
|
/// GetOrCreateSourceID - Look up the source id with the given directory and
|
|
/// source file names. If none currently exists, create a new id and insert it
|
|
/// in the SourceIds map. This can update DirectoryNames and SourceFileNames
|
|
/// maps as well.
|
|
|
|
unsigned DwarfDebug::GetOrCreateSourceID(StringRef FileName,
|
|
StringRef DirName) {
|
|
// If FE did not provide a file name, then assume stdin.
|
|
if (FileName.empty())
|
|
return GetOrCreateSourceID("<stdin>", StringRef());
|
|
|
|
// MCStream expects full path name as filename.
|
|
if (!DirName.empty() && !sys::path::is_absolute(FileName)) {
|
|
SmallString<128> FullPathName = DirName;
|
|
sys::path::append(FullPathName, FileName);
|
|
// Here FullPathName will be copied into StringMap by GetOrCreateSourceID.
|
|
return GetOrCreateSourceID(StringRef(FullPathName), StringRef());
|
|
}
|
|
|
|
StringMapEntry<unsigned> &Entry = SourceIdMap.GetOrCreateValue(FileName);
|
|
if (Entry.getValue())
|
|
return Entry.getValue();
|
|
|
|
unsigned SrcId = SourceIdMap.size();
|
|
Entry.setValue(SrcId);
|
|
|
|
// Print out a .file directive to specify files for .loc directives.
|
|
Asm->OutStreamer.EmitDwarfFileDirective(SrcId, Entry.getKey());
|
|
|
|
return SrcId;
|
|
}
|
|
|
|
/// constructCompileUnit - Create new CompileUnit for the given
|
|
/// metadata node with tag DW_TAG_compile_unit.
|
|
void DwarfDebug::constructCompileUnit(const MDNode *N) {
|
|
DICompileUnit DIUnit(N);
|
|
StringRef FN = DIUnit.getFilename();
|
|
StringRef Dir = DIUnit.getDirectory();
|
|
unsigned ID = GetOrCreateSourceID(FN, Dir);
|
|
|
|
DIE *Die = new DIE(dwarf::DW_TAG_compile_unit);
|
|
CompileUnit *NewCU = new CompileUnit(ID, Die, Asm, this);
|
|
NewCU->addString(Die, dwarf::DW_AT_producer, dwarf::DW_FORM_string,
|
|
DIUnit.getProducer());
|
|
NewCU->addUInt(Die, dwarf::DW_AT_language, dwarf::DW_FORM_data2,
|
|
DIUnit.getLanguage());
|
|
NewCU->addString(Die, dwarf::DW_AT_name, dwarf::DW_FORM_string, FN);
|
|
// Use DW_AT_entry_pc instead of DW_AT_low_pc/DW_AT_high_pc pair. This
|
|
// simplifies debug range entries.
|
|
NewCU->addUInt(Die, dwarf::DW_AT_entry_pc, dwarf::DW_FORM_addr, 0);
|
|
// DW_AT_stmt_list is a offset of line number information for this
|
|
// compile unit in debug_line section.
|
|
if(Asm->MAI->doesDwarfRequireRelocationForSectionOffset())
|
|
NewCU->addLabel(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4,
|
|
Asm->GetTempSymbol("section_line"));
|
|
else
|
|
NewCU->addUInt(Die, dwarf::DW_AT_stmt_list, dwarf::DW_FORM_data4, 0);
|
|
|
|
if (!Dir.empty())
|
|
NewCU->addString(Die, dwarf::DW_AT_comp_dir, dwarf::DW_FORM_string, Dir);
|
|
if (DIUnit.isOptimized())
|
|
NewCU->addUInt(Die, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1);
|
|
|
|
StringRef Flags = DIUnit.getFlags();
|
|
if (!Flags.empty())
|
|
NewCU->addString(Die, dwarf::DW_AT_APPLE_flags, dwarf::DW_FORM_string, Flags);
|
|
|
|
unsigned RVer = DIUnit.getRunTimeVersion();
|
|
if (RVer)
|
|
NewCU->addUInt(Die, dwarf::DW_AT_APPLE_major_runtime_vers,
|
|
dwarf::DW_FORM_data1, RVer);
|
|
|
|
if (!FirstCU)
|
|
FirstCU = NewCU;
|
|
CUMap.insert(std::make_pair(N, NewCU));
|
|
}
|
|
|
|
/// getCompielUnit - Get CompileUnit DIE.
|
|
CompileUnit *DwarfDebug::getCompileUnit(const MDNode *N) const {
|
|
assert (N && "Invalid DwarfDebug::getCompileUnit argument!");
|
|
DIDescriptor D(N);
|
|
const MDNode *CUNode = NULL;
|
|
if (D.isCompileUnit())
|
|
CUNode = N;
|
|
else if (D.isSubprogram())
|
|
CUNode = DISubprogram(N).getCompileUnit();
|
|
else if (D.isType())
|
|
CUNode = DIType(N).getCompileUnit();
|
|
else if (D.isGlobalVariable())
|
|
CUNode = DIGlobalVariable(N).getCompileUnit();
|
|
else if (D.isVariable())
|
|
CUNode = DIVariable(N).getCompileUnit();
|
|
else if (D.isNameSpace())
|
|
CUNode = DINameSpace(N).getCompileUnit();
|
|
else if (D.isFile())
|
|
CUNode = DIFile(N).getCompileUnit();
|
|
else
|
|
return FirstCU;
|
|
|
|
DenseMap<const MDNode *, CompileUnit *>::const_iterator I
|
|
= CUMap.find(CUNode);
|
|
if (I == CUMap.end())
|
|
return FirstCU;
|
|
return I->second;
|
|
}
|
|
|
|
/// isUnsignedDIType - Return true if type encoding is unsigned.
|
|
static bool isUnsignedDIType(DIType Ty) {
|
|
DIDerivedType DTy(Ty);
|
|
if (DTy.Verify())
|
|
return isUnsignedDIType(DTy.getTypeDerivedFrom());
|
|
|
|
DIBasicType BTy(Ty);
|
|
if (BTy.Verify()) {
|
|
unsigned Encoding = BTy.getEncoding();
|
|
if (Encoding == dwarf::DW_ATE_unsigned ||
|
|
Encoding == dwarf::DW_ATE_unsigned_char)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Return const exprssion if value is a GEP to access merged global
|
|
// constant. e.g.
|
|
// i8* getelementptr ({ i8, i8, i8, i8 }* @_MergedGlobals, i32 0, i32 0)
|
|
static const ConstantExpr *getMergedGlobalExpr(const Value *V) {
|
|
const ConstantExpr *CE = dyn_cast_or_null<ConstantExpr>(V);
|
|
if (!CE || CE->getNumOperands() != 3 ||
|
|
CE->getOpcode() != Instruction::GetElementPtr)
|
|
return NULL;
|
|
|
|
// First operand points to a global value.
|
|
if (!isa<GlobalValue>(CE->getOperand(0)))
|
|
return NULL;
|
|
|
|
// Second operand is zero.
|
|
const ConstantInt *CI =
|
|
dyn_cast_or_null<ConstantInt>(CE->getOperand(1));
|
|
if (!CI || !CI->isZero())
|
|
return NULL;
|
|
|
|
// Third operand is offset.
|
|
if (!isa<ConstantInt>(CE->getOperand(2)))
|
|
return NULL;
|
|
|
|
return CE;
|
|
}
|
|
|
|
/// constructGlobalVariableDIE - Construct global variable DIE.
|
|
void DwarfDebug::constructGlobalVariableDIE(const MDNode *N) {
|
|
DIGlobalVariable GV(N);
|
|
|
|
// If debug information is malformed then ignore it.
|
|
if (GV.Verify() == false)
|
|
return;
|
|
|
|
// Check for pre-existence.
|
|
CompileUnit *TheCU = getCompileUnit(N);
|
|
if (TheCU->getDIE(GV))
|
|
return;
|
|
|
|
DIType GTy = GV.getType();
|
|
DIE *VariableDIE = new DIE(GV.getTag());
|
|
|
|
bool isGlobalVariable = GV.getGlobal() != NULL;
|
|
|
|
// Add name.
|
|
TheCU->addString(VariableDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string,
|
|
GV.getDisplayName());
|
|
StringRef LinkageName = GV.getLinkageName();
|
|
if (!LinkageName.empty() && isGlobalVariable)
|
|
TheCU->addString(VariableDIE, dwarf::DW_AT_MIPS_linkage_name,
|
|
dwarf::DW_FORM_string,
|
|
getRealLinkageName(LinkageName));
|
|
// Add type.
|
|
TheCU->addType(VariableDIE, GTy);
|
|
|
|
// Add scoping info.
|
|
if (!GV.isLocalToUnit()) {
|
|
TheCU->addUInt(VariableDIE, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1);
|
|
// Expose as global.
|
|
TheCU->addGlobal(GV.getName(), VariableDIE);
|
|
}
|
|
// Add line number info.
|
|
TheCU->addSourceLine(VariableDIE, GV);
|
|
// Add to map.
|
|
TheCU->insertDIE(N, VariableDIE);
|
|
// Add to context owner.
|
|
DIDescriptor GVContext = GV.getContext();
|
|
TheCU->addToContextOwner(VariableDIE, GVContext);
|
|
// Add location.
|
|
if (isGlobalVariable) {
|
|
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
|
|
TheCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
|
|
TheCU->addLabel(Block, 0, dwarf::DW_FORM_udata,
|
|
Asm->Mang->getSymbol(GV.getGlobal()));
|
|
// Do not create specification DIE if context is either compile unit
|
|
// or a subprogram.
|
|
if (GV.isDefinition() && !GVContext.isCompileUnit() &&
|
|
!GVContext.isFile() && !isSubprogramContext(GVContext)) {
|
|
// Create specification DIE.
|
|
DIE *VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);
|
|
TheCU->addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification,
|
|
dwarf::DW_FORM_ref4, VariableDIE);
|
|
TheCU->addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block);
|
|
TheCU->addUInt(VariableDIE, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1);
|
|
TheCU->addDie(VariableSpecDIE);
|
|
} else {
|
|
TheCU->addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
|
|
}
|
|
} else if (ConstantInt *CI =
|
|
dyn_cast_or_null<ConstantInt>(GV.getConstant()))
|
|
TheCU->addConstantValue(VariableDIE, CI, isUnsignedDIType(GTy));
|
|
else if (const ConstantExpr *CE = getMergedGlobalExpr(N->getOperand(11))) {
|
|
// GV is a merged global.
|
|
DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
|
|
TheCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
|
|
TheCU->addLabel(Block, 0, dwarf::DW_FORM_udata,
|
|
Asm->Mang->getSymbol(cast<GlobalValue>(CE->getOperand(0))));
|
|
ConstantInt *CII = cast<ConstantInt>(CE->getOperand(2));
|
|
TheCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
|
|
TheCU->addUInt(Block, 0, dwarf::DW_FORM_udata, CII->getZExtValue());
|
|
TheCU->addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
|
|
TheCU->addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/// construct SubprogramDIE - Construct subprogram DIE.
|
|
void DwarfDebug::constructSubprogramDIE(const MDNode *N) {
|
|
DISubprogram SP(N);
|
|
|
|
// Check for pre-existence.
|
|
CompileUnit *TheCU = getCompileUnit(N);
|
|
if (TheCU->getDIE(N))
|
|
return;
|
|
|
|
if (!SP.isDefinition())
|
|
// This is a method declaration which will be handled while constructing
|
|
// class type.
|
|
return;
|
|
|
|
DIE *SubprogramDie = createSubprogramDIE(SP);
|
|
|
|
// Add to map.
|
|
TheCU->insertDIE(N, SubprogramDie);
|
|
|
|
// Add to context owner.
|
|
TheCU->addToContextOwner(SubprogramDie, SP.getContext());
|
|
|
|
// Expose as global.
|
|
TheCU->addGlobal(SP.getName(), SubprogramDie);
|
|
|
|
return;
|
|
}
|
|
|
|
/// beginModule - Emit all Dwarf sections that should come prior to the
|
|
/// content. Create global DIEs and emit initial debug info sections.
|
|
/// This is inovked by the target AsmPrinter.
|
|
void DwarfDebug::beginModule(Module *M) {
|
|
if (DisableDebugInfoPrinting)
|
|
return;
|
|
|
|
// If module has named metadata anchors then use them, otherwise scan the module
|
|
// using debug info finder to collect debug info.
|
|
NamedMDNode *CU_Nodes = M->getNamedMetadata("llvm.dbg.cu");
|
|
if (CU_Nodes) {
|
|
|
|
NamedMDNode *GV_Nodes = M->getNamedMetadata("llvm.dbg.gv");
|
|
NamedMDNode *SP_Nodes = M->getNamedMetadata("llvm.dbg.sp");
|
|
if (!GV_Nodes && !SP_Nodes)
|
|
// If there are not any global variables or any functions then
|
|
// there is not any debug info in this module.
|
|
return;
|
|
|
|
for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i)
|
|
constructCompileUnit(CU_Nodes->getOperand(i));
|
|
|
|
if (GV_Nodes)
|
|
for (unsigned i = 0, e = GV_Nodes->getNumOperands(); i != e; ++i)
|
|
constructGlobalVariableDIE(GV_Nodes->getOperand(i));
|
|
|
|
if (SP_Nodes)
|
|
for (unsigned i = 0, e = SP_Nodes->getNumOperands(); i != e; ++i)
|
|
constructSubprogramDIE(SP_Nodes->getOperand(i));
|
|
|
|
} else {
|
|
|
|
DebugInfoFinder DbgFinder;
|
|
DbgFinder.processModule(*M);
|
|
|
|
bool HasDebugInfo = false;
|
|
// Scan all the compile-units to see if there are any marked as the main unit.
|
|
// if not, we do not generate debug info.
|
|
for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
|
|
E = DbgFinder.compile_unit_end(); I != E; ++I) {
|
|
if (DICompileUnit(*I).isMain()) {
|
|
HasDebugInfo = true;
|
|
break;
|
|
}
|
|
}
|
|
if (!HasDebugInfo) return;
|
|
|
|
// Create all the compile unit DIEs.
|
|
for (DebugInfoFinder::iterator I = DbgFinder.compile_unit_begin(),
|
|
E = DbgFinder.compile_unit_end(); I != E; ++I)
|
|
constructCompileUnit(*I);
|
|
|
|
// Create DIEs for each global variable.
|
|
for (DebugInfoFinder::iterator I = DbgFinder.global_variable_begin(),
|
|
E = DbgFinder.global_variable_end(); I != E; ++I)
|
|
constructGlobalVariableDIE(*I);
|
|
|
|
// Create DIEs for each subprogram.
|
|
for (DebugInfoFinder::iterator I = DbgFinder.subprogram_begin(),
|
|
E = DbgFinder.subprogram_end(); I != E; ++I)
|
|
constructSubprogramDIE(*I);
|
|
}
|
|
|
|
// Tell MMI that we have debug info.
|
|
MMI->setDebugInfoAvailability(true);
|
|
|
|
// Emit initial sections.
|
|
EmitSectionLabels();
|
|
|
|
//getOrCreateTypeDIE
|
|
if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.enum"))
|
|
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
|
|
DIType Ty(NMD->getOperand(i));
|
|
getCompileUnit(Ty)->getOrCreateTypeDIE(Ty);
|
|
}
|
|
|
|
if (NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.ty"))
|
|
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
|
|
DIType Ty(NMD->getOperand(i));
|
|
getCompileUnit(Ty)->getOrCreateTypeDIE(Ty);
|
|
}
|
|
|
|
// Prime section data.
|
|
SectionMap.insert(Asm->getObjFileLowering().getTextSection());
|
|
}
|
|
|
|
/// endModule - Emit all Dwarf sections that should come after the content.
|
|
///
|
|
void DwarfDebug::endModule() {
|
|
if (!FirstCU) return;
|
|
const Module *M = MMI->getModule();
|
|
DenseMap<const MDNode *, DbgScope *> DeadFnScopeMap;
|
|
if (NamedMDNode *AllSPs = M->getNamedMetadata("llvm.dbg.sp")) {
|
|
for (unsigned SI = 0, SE = AllSPs->getNumOperands(); SI != SE; ++SI) {
|
|
if (ProcessedSPNodes.count(AllSPs->getOperand(SI)) != 0) continue;
|
|
DISubprogram SP(AllSPs->getOperand(SI));
|
|
if (!SP.Verify()) continue;
|
|
|
|
// Collect info for variables that were optimized out.
|
|
if (!SP.isDefinition()) continue;
|
|
StringRef FName = SP.getLinkageName();
|
|
if (FName.empty())
|
|
FName = SP.getName();
|
|
NamedMDNode *NMD = getFnSpecificMDNode(*(MMI->getModule()), FName);
|
|
if (!NMD) continue;
|
|
unsigned E = NMD->getNumOperands();
|
|
if (!E) continue;
|
|
DbgScope *Scope = new DbgScope(NULL, DIDescriptor(SP), NULL);
|
|
DeadFnScopeMap[SP] = Scope;
|
|
for (unsigned I = 0; I != E; ++I) {
|
|
DIVariable DV(NMD->getOperand(I));
|
|
if (!DV.Verify()) continue;
|
|
Scope->addVariable(new DbgVariable(DV));
|
|
}
|
|
|
|
// Construct subprogram DIE and add variables DIEs.
|
|
constructSubprogramDIE(SP);
|
|
DIE *ScopeDIE = getCompileUnit(SP)->getDIE(SP);
|
|
const SmallVector<DbgVariable *, 8> &Variables = Scope->getDbgVariables();
|
|
for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
|
|
DIE *VariableDIE = constructVariableDIE(Variables[i], Scope);
|
|
if (VariableDIE)
|
|
ScopeDIE->addChild(VariableDIE);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Attach DW_AT_inline attribute with inlined subprogram DIEs.
|
|
for (SmallPtrSet<DIE *, 4>::iterator AI = InlinedSubprogramDIEs.begin(),
|
|
AE = InlinedSubprogramDIEs.end(); AI != AE; ++AI) {
|
|
DIE *ISP = *AI;
|
|
FirstCU->addUInt(ISP, dwarf::DW_AT_inline, 0, dwarf::DW_INL_inlined);
|
|
}
|
|
|
|
for (DenseMap<DIE *, const MDNode *>::iterator CI = ContainingTypeMap.begin(),
|
|
CE = ContainingTypeMap.end(); CI != CE; ++CI) {
|
|
DIE *SPDie = CI->first;
|
|
const MDNode *N = dyn_cast_or_null<MDNode>(CI->second);
|
|
if (!N) continue;
|
|
DIE *NDie = getCompileUnit(N)->getDIE(N);
|
|
if (!NDie) continue;
|
|
getCompileUnit(N)->addDIEEntry(SPDie, dwarf::DW_AT_containing_type,
|
|
dwarf::DW_FORM_ref4, NDie);
|
|
}
|
|
|
|
// Standard sections final addresses.
|
|
Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering().getTextSection());
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("text_end"));
|
|
Asm->OutStreamer.SwitchSection(Asm->getObjFileLowering().getDataSection());
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("data_end"));
|
|
|
|
// End text sections.
|
|
for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
|
|
Asm->OutStreamer.SwitchSection(SectionMap[i]);
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("section_end", i));
|
|
}
|
|
|
|
// Compute DIE offsets and sizes.
|
|
computeSizeAndOffsets();
|
|
|
|
// Emit all the DIEs into a debug info section
|
|
emitDebugInfo();
|
|
|
|
// Corresponding abbreviations into a abbrev section.
|
|
emitAbbreviations();
|
|
|
|
// Emit info into a debug pubnames section.
|
|
emitDebugPubNames();
|
|
|
|
// Emit info into a debug pubtypes section.
|
|
emitDebugPubTypes();
|
|
|
|
// Emit info into a debug loc section.
|
|
emitDebugLoc();
|
|
|
|
// Emit info into a debug aranges section.
|
|
EmitDebugARanges();
|
|
|
|
// Emit info into a debug ranges section.
|
|
emitDebugRanges();
|
|
|
|
// Emit info into a debug macinfo section.
|
|
emitDebugMacInfo();
|
|
|
|
// Emit inline info.
|
|
emitDebugInlineInfo();
|
|
|
|
// Emit info into a debug str section.
|
|
emitDebugStr();
|
|
|
|
// clean up.
|
|
DeleteContainerSeconds(DeadFnScopeMap);
|
|
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
|
|
E = CUMap.end(); I != E; ++I)
|
|
delete I->second;
|
|
FirstCU = NULL; // Reset for the next Module, if any.
|
|
}
|
|
|
|
/// findAbstractVariable - Find abstract variable, if any, associated with Var.
|
|
DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
|
|
DebugLoc ScopeLoc) {
|
|
|
|
DbgVariable *AbsDbgVariable = AbstractVariables.lookup(Var);
|
|
if (AbsDbgVariable)
|
|
return AbsDbgVariable;
|
|
|
|
LLVMContext &Ctx = Var->getContext();
|
|
DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope(Ctx));
|
|
if (!Scope)
|
|
return NULL;
|
|
|
|
AbsDbgVariable = new DbgVariable(Var);
|
|
Scope->addVariable(AbsDbgVariable);
|
|
AbstractVariables[Var] = AbsDbgVariable;
|
|
return AbsDbgVariable;
|
|
}
|
|
|
|
/// addCurrentFnArgument - If Var is an current function argument that add
|
|
/// it in CurrentFnArguments list.
|
|
bool DwarfDebug::addCurrentFnArgument(const MachineFunction *MF,
|
|
DbgVariable *Var, DbgScope *Scope) {
|
|
if (Scope != CurrentFnDbgScope)
|
|
return false;
|
|
DIVariable DV = Var->getVariable();
|
|
if (DV.getTag() != dwarf::DW_TAG_arg_variable)
|
|
return false;
|
|
unsigned ArgNo = DV.getArgNumber();
|
|
if (ArgNo == 0)
|
|
return false;
|
|
|
|
size_t Size = CurrentFnArguments.size();
|
|
if (Size == 0)
|
|
CurrentFnArguments.resize(MF->getFunction()->arg_size());
|
|
// llvm::Function argument size is not good indicator of how many
|
|
// arguments does the function have at source level.
|
|
if (ArgNo > Size)
|
|
CurrentFnArguments.resize(ArgNo * 2);
|
|
CurrentFnArguments[ArgNo - 1] = Var;
|
|
return true;
|
|
}
|
|
|
|
/// collectVariableInfoFromMMITable - Collect variable information from
|
|
/// side table maintained by MMI.
|
|
void
|
|
DwarfDebug::collectVariableInfoFromMMITable(const MachineFunction * MF,
|
|
SmallPtrSet<const MDNode *, 16> &Processed) {
|
|
const LLVMContext &Ctx = Asm->MF->getFunction()->getContext();
|
|
MachineModuleInfo::VariableDbgInfoMapTy &VMap = MMI->getVariableDbgInfo();
|
|
for (MachineModuleInfo::VariableDbgInfoMapTy::iterator VI = VMap.begin(),
|
|
VE = VMap.end(); VI != VE; ++VI) {
|
|
const MDNode *Var = VI->first;
|
|
if (!Var) continue;
|
|
Processed.insert(Var);
|
|
DIVariable DV(Var);
|
|
const std::pair<unsigned, DebugLoc> &VP = VI->second;
|
|
|
|
DbgScope *Scope = 0;
|
|
if (const MDNode *IA = VP.second.getInlinedAt(Ctx))
|
|
Scope = ConcreteScopes.lookup(IA);
|
|
if (Scope == 0)
|
|
Scope = DbgScopeMap.lookup(VP.second.getScope(Ctx));
|
|
|
|
// If variable scope is not found then skip this variable.
|
|
if (Scope == 0)
|
|
continue;
|
|
|
|
DbgVariable *AbsDbgVariable = findAbstractVariable(DV, VP.second);
|
|
DbgVariable *RegVar = new DbgVariable(DV);
|
|
recordVariableFrameIndex(RegVar, VP.first);
|
|
if (!addCurrentFnArgument(MF, RegVar, Scope))
|
|
Scope->addVariable(RegVar);
|
|
if (AbsDbgVariable) {
|
|
recordVariableFrameIndex(AbsDbgVariable, VP.first);
|
|
VarToAbstractVarMap[RegVar] = AbsDbgVariable;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// isDbgValueInDefinedReg - Return true if debug value, encoded by
|
|
/// DBG_VALUE instruction, is in a defined reg.
|
|
static bool isDbgValueInDefinedReg(const MachineInstr *MI) {
|
|
assert (MI->isDebugValue() && "Invalid DBG_VALUE machine instruction!");
|
|
return MI->getNumOperands() == 3 &&
|
|
MI->getOperand(0).isReg() && MI->getOperand(0).getReg() &&
|
|
MI->getOperand(1).isImm() && MI->getOperand(1).getImm() == 0;
|
|
}
|
|
|
|
/// collectVariableInfo - Populate DbgScope entries with variables' info.
|
|
void
|
|
DwarfDebug::collectVariableInfo(const MachineFunction *MF,
|
|
SmallPtrSet<const MDNode *, 16> &Processed) {
|
|
|
|
/// collection info from MMI table.
|
|
collectVariableInfoFromMMITable(MF, Processed);
|
|
|
|
for (SmallVectorImpl<const MDNode*>::const_iterator
|
|
UVI = UserVariables.begin(), UVE = UserVariables.end(); UVI != UVE;
|
|
++UVI) {
|
|
const MDNode *Var = *UVI;
|
|
if (Processed.count(Var))
|
|
continue;
|
|
|
|
// History contains relevant DBG_VALUE instructions for Var and instructions
|
|
// clobbering it.
|
|
SmallVectorImpl<const MachineInstr*> &History = DbgValues[Var];
|
|
if (History.empty())
|
|
continue;
|
|
const MachineInstr *MInsn = History.front();
|
|
|
|
DIVariable DV(Var);
|
|
DbgScope *Scope = NULL;
|
|
if (DV.getTag() == dwarf::DW_TAG_arg_variable &&
|
|
DISubprogram(DV.getContext()).describes(MF->getFunction()))
|
|
Scope = CurrentFnDbgScope;
|
|
else
|
|
Scope = findDbgScope(MInsn);
|
|
// If variable scope is not found then skip this variable.
|
|
if (!Scope)
|
|
continue;
|
|
|
|
Processed.insert(DV);
|
|
assert(MInsn->isDebugValue() && "History must begin with debug value");
|
|
DbgVariable *RegVar = new DbgVariable(DV);
|
|
if (!addCurrentFnArgument(MF, RegVar, Scope))
|
|
Scope->addVariable(RegVar);
|
|
if (DbgVariable *AbsVar = findAbstractVariable(DV, MInsn->getDebugLoc())) {
|
|
DbgVariableToDbgInstMap[AbsVar] = MInsn;
|
|
VarToAbstractVarMap[RegVar] = AbsVar;
|
|
}
|
|
|
|
// Simple ranges that are fully coalesced.
|
|
if (History.size() <= 1 || (History.size() == 2 &&
|
|
MInsn->isIdenticalTo(History.back()))) {
|
|
DbgVariableToDbgInstMap[RegVar] = MInsn;
|
|
continue;
|
|
}
|
|
|
|
// handle multiple DBG_VALUE instructions describing one variable.
|
|
RegVar->setDotDebugLocOffset(DotDebugLocEntries.size());
|
|
|
|
for (SmallVectorImpl<const MachineInstr*>::const_iterator
|
|
HI = History.begin(), HE = History.end(); HI != HE; ++HI) {
|
|
const MachineInstr *Begin = *HI;
|
|
assert(Begin->isDebugValue() && "Invalid History entry");
|
|
|
|
// Check if DBG_VALUE is truncating a range.
|
|
if (Begin->getNumOperands() > 1 && Begin->getOperand(0).isReg()
|
|
&& !Begin->getOperand(0).getReg())
|
|
continue;
|
|
|
|
// Compute the range for a register location.
|
|
const MCSymbol *FLabel = getLabelBeforeInsn(Begin);
|
|
const MCSymbol *SLabel = 0;
|
|
|
|
if (HI + 1 == HE)
|
|
// If Begin is the last instruction in History then its value is valid
|
|
// until the end of the function.
|
|
SLabel = FunctionEndSym;
|
|
else {
|
|
const MachineInstr *End = HI[1];
|
|
if (End->isDebugValue())
|
|
SLabel = getLabelBeforeInsn(End);
|
|
else {
|
|
// End is a normal instruction clobbering the range.
|
|
SLabel = getLabelAfterInsn(End);
|
|
assert(SLabel && "Forgot label after clobber instruction");
|
|
++HI;
|
|
}
|
|
}
|
|
|
|
// The value is valid until the next DBG_VALUE or clobber.
|
|
MachineLocation MLoc;
|
|
if (Begin->getNumOperands() == 3) {
|
|
if (Begin->getOperand(0).isReg() && Begin->getOperand(1).isImm()) {
|
|
MLoc.set(Begin->getOperand(0).getReg(),
|
|
Begin->getOperand(1).getImm());
|
|
DotDebugLocEntries.
|
|
push_back(DotDebugLocEntry(FLabel, SLabel, MLoc, Var));
|
|
}
|
|
// FIXME: Handle isFPImm also.
|
|
else if (Begin->getOperand(0).isImm()) {
|
|
DotDebugLocEntries.
|
|
push_back(DotDebugLocEntry(FLabel, SLabel,
|
|
Begin->getOperand(0).getImm()));
|
|
}
|
|
} else {
|
|
MLoc = Asm->getDebugValueLocation(Begin);
|
|
DotDebugLocEntries.
|
|
push_back(DotDebugLocEntry(FLabel, SLabel, MLoc, Var));
|
|
}
|
|
}
|
|
DotDebugLocEntries.push_back(DotDebugLocEntry());
|
|
}
|
|
|
|
// Collect info for variables that were optimized out.
|
|
const Function *F = MF->getFunction();
|
|
if (NamedMDNode *NMD = getFnSpecificMDNode(*(F->getParent()), F->getName())) {
|
|
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
|
|
DIVariable DV(cast<MDNode>(NMD->getOperand(i)));
|
|
if (!DV || !Processed.insert(DV))
|
|
continue;
|
|
DbgScope *Scope = DbgScopeMap.lookup(DV.getContext());
|
|
if (Scope)
|
|
Scope->addVariable(new DbgVariable(DV));
|
|
}
|
|
}
|
|
}
|
|
|
|
/// getLabelBeforeInsn - Return Label preceding the instruction.
|
|
const MCSymbol *DwarfDebug::getLabelBeforeInsn(const MachineInstr *MI) {
|
|
MCSymbol *Label = LabelsBeforeInsn.lookup(MI);
|
|
assert(Label && "Didn't insert label before instruction");
|
|
return Label;
|
|
}
|
|
|
|
/// getLabelAfterInsn - Return Label immediately following the instruction.
|
|
const MCSymbol *DwarfDebug::getLabelAfterInsn(const MachineInstr *MI) {
|
|
return LabelsAfterInsn.lookup(MI);
|
|
}
|
|
|
|
/// beginInstruction - Process beginning of an instruction.
|
|
void DwarfDebug::beginInstruction(const MachineInstr *MI) {
|
|
// Check if source location changes, but ignore DBG_VALUE locations.
|
|
if (!MI->isDebugValue()) {
|
|
DebugLoc DL = MI->getDebugLoc();
|
|
if (DL != PrevInstLoc && (!DL.isUnknown() || UnknownLocations)) {
|
|
unsigned Flags = DWARF2_FLAG_IS_STMT;
|
|
PrevInstLoc = DL;
|
|
if (DL == PrologEndLoc) {
|
|
Flags |= DWARF2_FLAG_PROLOGUE_END;
|
|
PrologEndLoc = DebugLoc();
|
|
}
|
|
if (!DL.isUnknown()) {
|
|
const MDNode *Scope = DL.getScope(Asm->MF->getFunction()->getContext());
|
|
recordSourceLine(DL.getLine(), DL.getCol(), Scope, Flags);
|
|
} else
|
|
recordSourceLine(0, 0, 0, 0);
|
|
}
|
|
}
|
|
|
|
// Insert labels where requested.
|
|
DenseMap<const MachineInstr*, MCSymbol*>::iterator I =
|
|
LabelsBeforeInsn.find(MI);
|
|
|
|
// No label needed.
|
|
if (I == LabelsBeforeInsn.end())
|
|
return;
|
|
|
|
// Label already assigned.
|
|
if (I->second)
|
|
return;
|
|
|
|
if (!PrevLabel) {
|
|
PrevLabel = MMI->getContext().CreateTempSymbol();
|
|
Asm->OutStreamer.EmitLabel(PrevLabel);
|
|
}
|
|
I->second = PrevLabel;
|
|
}
|
|
|
|
/// endInstruction - Process end of an instruction.
|
|
void DwarfDebug::endInstruction(const MachineInstr *MI) {
|
|
// Don't create a new label after DBG_VALUE instructions.
|
|
// They don't generate code.
|
|
if (!MI->isDebugValue())
|
|
PrevLabel = 0;
|
|
|
|
DenseMap<const MachineInstr*, MCSymbol*>::iterator I =
|
|
LabelsAfterInsn.find(MI);
|
|
|
|
// No label needed.
|
|
if (I == LabelsAfterInsn.end())
|
|
return;
|
|
|
|
// Label already assigned.
|
|
if (I->second)
|
|
return;
|
|
|
|
// We need a label after this instruction.
|
|
if (!PrevLabel) {
|
|
PrevLabel = MMI->getContext().CreateTempSymbol();
|
|
Asm->OutStreamer.EmitLabel(PrevLabel);
|
|
}
|
|
I->second = PrevLabel;
|
|
}
|
|
|
|
/// getOrCreateDbgScope - Create DbgScope for the scope.
|
|
DbgScope *DwarfDebug::getOrCreateDbgScope(const MDNode *Scope,
|
|
const MDNode *InlinedAt) {
|
|
if (!InlinedAt) {
|
|
DbgScope *WScope = DbgScopeMap.lookup(Scope);
|
|
if (WScope)
|
|
return WScope;
|
|
WScope = new DbgScope(NULL, DIDescriptor(Scope), NULL);
|
|
DbgScopeMap.insert(std::make_pair(Scope, WScope));
|
|
if (DIDescriptor(Scope).isLexicalBlock()) {
|
|
DbgScope *Parent =
|
|
getOrCreateDbgScope(DILexicalBlock(Scope).getContext(), NULL);
|
|
WScope->setParent(Parent);
|
|
Parent->addScope(WScope);
|
|
}
|
|
|
|
if (!WScope->getParent()) {
|
|
StringRef SPName = DISubprogram(Scope).getLinkageName();
|
|
// We used to check only for a linkage name, but that fails
|
|
// since we began omitting the linkage name for private
|
|
// functions. The new way is to check for the name in metadata,
|
|
// but that's not supported in old .ll test cases. Ergo, we
|
|
// check both.
|
|
if (SPName == Asm->MF->getFunction()->getName() ||
|
|
DISubprogram(Scope).getFunction() == Asm->MF->getFunction())
|
|
CurrentFnDbgScope = WScope;
|
|
}
|
|
|
|
return WScope;
|
|
}
|
|
|
|
getOrCreateAbstractScope(Scope);
|
|
DbgScope *WScope = DbgScopeMap.lookup(InlinedAt);
|
|
if (WScope)
|
|
return WScope;
|
|
|
|
WScope = new DbgScope(NULL, DIDescriptor(Scope), InlinedAt);
|
|
DbgScopeMap.insert(std::make_pair(InlinedAt, WScope));
|
|
DILocation DL(InlinedAt);
|
|
DbgScope *Parent =
|
|
getOrCreateDbgScope(DL.getScope(), DL.getOrigLocation());
|
|
WScope->setParent(Parent);
|
|
Parent->addScope(WScope);
|
|
|
|
ConcreteScopes[InlinedAt] = WScope;
|
|
|
|
return WScope;
|
|
}
|
|
|
|
/// hasValidLocation - Return true if debug location entry attached with
|
|
/// machine instruction encodes valid location info.
|
|
static bool hasValidLocation(LLVMContext &Ctx,
|
|
const MachineInstr *MInsn,
|
|
const MDNode *&Scope, const MDNode *&InlinedAt) {
|
|
DebugLoc DL = MInsn->getDebugLoc();
|
|
if (DL.isUnknown()) return false;
|
|
|
|
const MDNode *S = DL.getScope(Ctx);
|
|
|
|
// There is no need to create another DIE for compile unit. For all
|
|
// other scopes, create one DbgScope now. This will be translated
|
|
// into a scope DIE at the end.
|
|
if (DIScope(S).isCompileUnit()) return false;
|
|
|
|
Scope = S;
|
|
InlinedAt = DL.getInlinedAt(Ctx);
|
|
return true;
|
|
}
|
|
|
|
/// calculateDominanceGraph - Calculate dominance graph for DbgScope
|
|
/// hierarchy.
|
|
static void calculateDominanceGraph(DbgScope *Scope) {
|
|
assert (Scope && "Unable to calculate scop edominance graph!");
|
|
SmallVector<DbgScope *, 4> WorkStack;
|
|
WorkStack.push_back(Scope);
|
|
unsigned Counter = 0;
|
|
while (!WorkStack.empty()) {
|
|
DbgScope *WS = WorkStack.back();
|
|
const SmallVector<DbgScope *, 4> &Children = WS->getScopes();
|
|
bool visitedChildren = false;
|
|
for (SmallVector<DbgScope *, 4>::const_iterator SI = Children.begin(),
|
|
SE = Children.end(); SI != SE; ++SI) {
|
|
DbgScope *ChildScope = *SI;
|
|
if (!ChildScope->getDFSOut()) {
|
|
WorkStack.push_back(ChildScope);
|
|
visitedChildren = true;
|
|
ChildScope->setDFSIn(++Counter);
|
|
break;
|
|
}
|
|
}
|
|
if (!visitedChildren) {
|
|
WorkStack.pop_back();
|
|
WS->setDFSOut(++Counter);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// printDbgScopeInfo - Print DbgScope info for each machine instruction.
|
|
static
|
|
void printDbgScopeInfo(LLVMContext &Ctx, const MachineFunction *MF,
|
|
DenseMap<const MachineInstr *, DbgScope *> &MI2ScopeMap)
|
|
{
|
|
#ifndef NDEBUG
|
|
unsigned PrevDFSIn = 0;
|
|
for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
|
|
I != E; ++I) {
|
|
for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
|
|
II != IE; ++II) {
|
|
const MachineInstr *MInsn = II;
|
|
const MDNode *Scope = NULL;
|
|
const MDNode *InlinedAt = NULL;
|
|
|
|
// Check if instruction has valid location information.
|
|
if (hasValidLocation(Ctx, MInsn, Scope, InlinedAt)) {
|
|
dbgs() << " [ ";
|
|
if (InlinedAt)
|
|
dbgs() << "*";
|
|
DenseMap<const MachineInstr *, DbgScope *>::iterator DI =
|
|
MI2ScopeMap.find(MInsn);
|
|
if (DI != MI2ScopeMap.end()) {
|
|
DbgScope *S = DI->second;
|
|
dbgs() << S->getDFSIn();
|
|
PrevDFSIn = S->getDFSIn();
|
|
} else
|
|
dbgs() << PrevDFSIn;
|
|
} else
|
|
dbgs() << " [ x" << PrevDFSIn;
|
|
dbgs() << " ]";
|
|
MInsn->dump();
|
|
}
|
|
dbgs() << "\n";
|
|
}
|
|
#endif
|
|
}
|
|
/// extractScopeInformation - Scan machine instructions in this function
|
|
/// and collect DbgScopes. Return true, if at least one scope was found.
|
|
bool DwarfDebug::extractScopeInformation() {
|
|
// If scope information was extracted using .dbg intrinsics then there is not
|
|
// any need to extract these information by scanning each instruction.
|
|
if (!DbgScopeMap.empty())
|
|
return false;
|
|
|
|
// Scan each instruction and create scopes. First build working set of scopes.
|
|
LLVMContext &Ctx = Asm->MF->getFunction()->getContext();
|
|
SmallVector<DbgRange, 4> MIRanges;
|
|
DenseMap<const MachineInstr *, DbgScope *> MI2ScopeMap;
|
|
const MDNode *PrevScope = NULL;
|
|
const MDNode *PrevInlinedAt = NULL;
|
|
const MachineInstr *RangeBeginMI = NULL;
|
|
const MachineInstr *PrevMI = NULL;
|
|
for (MachineFunction::const_iterator I = Asm->MF->begin(), E = Asm->MF->end();
|
|
I != E; ++I) {
|
|
for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
|
|
II != IE; ++II) {
|
|
const MachineInstr *MInsn = II;
|
|
const MDNode *Scope = NULL;
|
|
const MDNode *InlinedAt = NULL;
|
|
|
|
// Check if instruction has valid location information.
|
|
if (!hasValidLocation(Ctx, MInsn, Scope, InlinedAt)) {
|
|
PrevMI = MInsn;
|
|
continue;
|
|
}
|
|
|
|
// If scope has not changed then skip this instruction.
|
|
if (Scope == PrevScope && PrevInlinedAt == InlinedAt) {
|
|
PrevMI = MInsn;
|
|
continue;
|
|
}
|
|
|
|
// Ignore DBG_VALUE. It does not contribute any instruction in output.
|
|
if (MInsn->isDebugValue())
|
|
continue;
|
|
|
|
if (RangeBeginMI) {
|
|
// If we have alread seen a beginning of a instruction range and
|
|
// current instruction scope does not match scope of first instruction
|
|
// in this range then create a new instruction range.
|
|
DbgRange R(RangeBeginMI, PrevMI);
|
|
MI2ScopeMap[RangeBeginMI] = getOrCreateDbgScope(PrevScope,
|
|
PrevInlinedAt);
|
|
MIRanges.push_back(R);
|
|
}
|
|
|
|
// This is a beginning of a new instruction range.
|
|
RangeBeginMI = MInsn;
|
|
|
|
// Reset previous markers.
|
|
PrevMI = MInsn;
|
|
PrevScope = Scope;
|
|
PrevInlinedAt = InlinedAt;
|
|
}
|
|
}
|
|
|
|
// Create last instruction range.
|
|
if (RangeBeginMI && PrevMI && PrevScope) {
|
|
DbgRange R(RangeBeginMI, PrevMI);
|
|
MIRanges.push_back(R);
|
|
MI2ScopeMap[RangeBeginMI] = getOrCreateDbgScope(PrevScope, PrevInlinedAt);
|
|
}
|
|
|
|
if (!CurrentFnDbgScope)
|
|
return false;
|
|
|
|
calculateDominanceGraph(CurrentFnDbgScope);
|
|
if (PrintDbgScope)
|
|
printDbgScopeInfo(Ctx, Asm->MF, MI2ScopeMap);
|
|
|
|
// Find ranges of instructions covered by each DbgScope;
|
|
DbgScope *PrevDbgScope = NULL;
|
|
for (SmallVector<DbgRange, 4>::const_iterator RI = MIRanges.begin(),
|
|
RE = MIRanges.end(); RI != RE; ++RI) {
|
|
const DbgRange &R = *RI;
|
|
DbgScope *S = MI2ScopeMap.lookup(R.first);
|
|
assert (S && "Lost DbgScope for a machine instruction!");
|
|
if (PrevDbgScope && !PrevDbgScope->dominates(S))
|
|
PrevDbgScope->closeInsnRange(S);
|
|
S->openInsnRange(R.first);
|
|
S->extendInsnRange(R.second);
|
|
PrevDbgScope = S;
|
|
}
|
|
|
|
if (PrevDbgScope)
|
|
PrevDbgScope->closeInsnRange();
|
|
|
|
identifyScopeMarkers();
|
|
|
|
return !DbgScopeMap.empty();
|
|
}
|
|
|
|
/// identifyScopeMarkers() -
|
|
/// Each DbgScope has first instruction and last instruction to mark beginning
|
|
/// and end of a scope respectively. Create an inverse map that list scopes
|
|
/// starts (and ends) with an instruction. One instruction may start (or end)
|
|
/// multiple scopes. Ignore scopes that are not reachable.
|
|
void DwarfDebug::identifyScopeMarkers() {
|
|
SmallVector<DbgScope *, 4> WorkList;
|
|
WorkList.push_back(CurrentFnDbgScope);
|
|
while (!WorkList.empty()) {
|
|
DbgScope *S = WorkList.pop_back_val();
|
|
|
|
const SmallVector<DbgScope *, 4> &Children = S->getScopes();
|
|
if (!Children.empty())
|
|
for (SmallVector<DbgScope *, 4>::const_iterator SI = Children.begin(),
|
|
SE = Children.end(); SI != SE; ++SI)
|
|
WorkList.push_back(*SI);
|
|
|
|
if (S->isAbstractScope())
|
|
continue;
|
|
|
|
const SmallVector<DbgRange, 4> &Ranges = S->getRanges();
|
|
if (Ranges.empty())
|
|
continue;
|
|
for (SmallVector<DbgRange, 4>::const_iterator RI = Ranges.begin(),
|
|
RE = Ranges.end(); RI != RE; ++RI) {
|
|
assert(RI->first && "DbgRange does not have first instruction!");
|
|
assert(RI->second && "DbgRange does not have second instruction!");
|
|
requestLabelBeforeInsn(RI->first);
|
|
requestLabelAfterInsn(RI->second);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// getScopeNode - Get MDNode for DebugLoc's scope.
|
|
static MDNode *getScopeNode(DebugLoc DL, const LLVMContext &Ctx) {
|
|
if (MDNode *InlinedAt = DL.getInlinedAt(Ctx))
|
|
return getScopeNode(DebugLoc::getFromDILocation(InlinedAt), Ctx);
|
|
return DL.getScope(Ctx);
|
|
}
|
|
|
|
/// getFnDebugLoc - Walk up the scope chain of given debug loc and find
|
|
/// line number info for the function.
|
|
static DebugLoc getFnDebugLoc(DebugLoc DL, const LLVMContext &Ctx) {
|
|
const MDNode *Scope = getScopeNode(DL, Ctx);
|
|
DISubprogram SP = getDISubprogram(Scope);
|
|
if (SP.Verify())
|
|
return DebugLoc::get(SP.getLineNumber(), 0, SP);
|
|
return DebugLoc();
|
|
}
|
|
|
|
/// beginFunction - Gather pre-function debug information. Assumes being
|
|
/// emitted immediately after the function entry point.
|
|
void DwarfDebug::beginFunction(const MachineFunction *MF) {
|
|
if (!MMI->hasDebugInfo()) return;
|
|
if (!extractScopeInformation()) return;
|
|
|
|
FunctionBeginSym = Asm->GetTempSymbol("func_begin",
|
|
Asm->getFunctionNumber());
|
|
// Assumes in correct section after the entry point.
|
|
Asm->OutStreamer.EmitLabel(FunctionBeginSym);
|
|
|
|
assert(UserVariables.empty() && DbgValues.empty() && "Maps weren't cleaned");
|
|
|
|
/// ProcessedArgs - Collection of arguments already processed.
|
|
SmallPtrSet<const MDNode *, 8> ProcessedArgs;
|
|
const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
|
|
/// LiveUserVar - Map physreg numbers to the MDNode they contain.
|
|
std::vector<const MDNode*> LiveUserVar(TRI->getNumRegs());
|
|
|
|
for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
|
|
I != E; ++I) {
|
|
bool AtBlockEntry = true;
|
|
for (MachineBasicBlock::const_iterator II = I->begin(), IE = I->end();
|
|
II != IE; ++II) {
|
|
const MachineInstr *MI = II;
|
|
|
|
if (MI->isDebugValue()) {
|
|
assert (MI->getNumOperands() > 1 && "Invalid machine instruction!");
|
|
|
|
// Keep track of user variables.
|
|
const MDNode *Var =
|
|
MI->getOperand(MI->getNumOperands() - 1).getMetadata();
|
|
|
|
// Variable is in a register, we need to check for clobbers.
|
|
if (isDbgValueInDefinedReg(MI))
|
|
LiveUserVar[MI->getOperand(0).getReg()] = Var;
|
|
|
|
// Check the history of this variable.
|
|
SmallVectorImpl<const MachineInstr*> &History = DbgValues[Var];
|
|
if (History.empty()) {
|
|
UserVariables.push_back(Var);
|
|
// The first mention of a function argument gets the FunctionBeginSym
|
|
// label, so arguments are visible when breaking at function entry.
|
|
DIVariable DV(Var);
|
|
if (DV.Verify() && DV.getTag() == dwarf::DW_TAG_arg_variable &&
|
|
DISubprogram(getDISubprogram(DV.getContext()))
|
|
.describes(MF->getFunction()))
|
|
LabelsBeforeInsn[MI] = FunctionBeginSym;
|
|
} else {
|
|
// We have seen this variable before. Try to coalesce DBG_VALUEs.
|
|
const MachineInstr *Prev = History.back();
|
|
if (Prev->isDebugValue()) {
|
|
// Coalesce identical entries at the end of History.
|
|
if (History.size() >= 2 &&
|
|
Prev->isIdenticalTo(History[History.size() - 2]))
|
|
History.pop_back();
|
|
|
|
// Terminate old register assignments that don't reach MI;
|
|
MachineFunction::const_iterator PrevMBB = Prev->getParent();
|
|
if (PrevMBB != I && (!AtBlockEntry || llvm::next(PrevMBB) != I) &&
|
|
isDbgValueInDefinedReg(Prev)) {
|
|
// Previous register assignment needs to terminate at the end of
|
|
// its basic block.
|
|
MachineBasicBlock::const_iterator LastMI =
|
|
PrevMBB->getLastNonDebugInstr();
|
|
if (LastMI == PrevMBB->end())
|
|
// Drop DBG_VALUE for empty range.
|
|
History.pop_back();
|
|
else {
|
|
// Terminate after LastMI.
|
|
History.push_back(LastMI);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
History.push_back(MI);
|
|
} else {
|
|
// Not a DBG_VALUE instruction.
|
|
if (!MI->isLabel())
|
|
AtBlockEntry = false;
|
|
|
|
// First known non DBG_VALUE location marks beginning of function
|
|
// body.
|
|
if (PrologEndLoc.isUnknown() && !MI->getDebugLoc().isUnknown())
|
|
PrologEndLoc = MI->getDebugLoc();
|
|
|
|
// Check if the instruction clobbers any registers with debug vars.
|
|
for (MachineInstr::const_mop_iterator MOI = MI->operands_begin(),
|
|
MOE = MI->operands_end(); MOI != MOE; ++MOI) {
|
|
if (!MOI->isReg() || !MOI->isDef() || !MOI->getReg())
|
|
continue;
|
|
for (const unsigned *AI = TRI->getOverlaps(MOI->getReg());
|
|
unsigned Reg = *AI; ++AI) {
|
|
const MDNode *Var = LiveUserVar[Reg];
|
|
if (!Var)
|
|
continue;
|
|
// Reg is now clobbered.
|
|
LiveUserVar[Reg] = 0;
|
|
|
|
// Was MD last defined by a DBG_VALUE referring to Reg?
|
|
DbgValueHistoryMap::iterator HistI = DbgValues.find(Var);
|
|
if (HistI == DbgValues.end())
|
|
continue;
|
|
SmallVectorImpl<const MachineInstr*> &History = HistI->second;
|
|
if (History.empty())
|
|
continue;
|
|
const MachineInstr *Prev = History.back();
|
|
// Sanity-check: Register assignments are terminated at the end of
|
|
// their block.
|
|
if (!Prev->isDebugValue() || Prev->getParent() != MI->getParent())
|
|
continue;
|
|
// Is the variable still in Reg?
|
|
if (!isDbgValueInDefinedReg(Prev) ||
|
|
Prev->getOperand(0).getReg() != Reg)
|
|
continue;
|
|
// Var is clobbered. Make sure the next instruction gets a label.
|
|
History.push_back(MI);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
for (DbgValueHistoryMap::iterator I = DbgValues.begin(), E = DbgValues.end();
|
|
I != E; ++I) {
|
|
SmallVectorImpl<const MachineInstr*> &History = I->second;
|
|
if (History.empty())
|
|
continue;
|
|
|
|
// Make sure the final register assignments are terminated.
|
|
const MachineInstr *Prev = History.back();
|
|
if (Prev->isDebugValue() && isDbgValueInDefinedReg(Prev)) {
|
|
const MachineBasicBlock *PrevMBB = Prev->getParent();
|
|
MachineBasicBlock::const_iterator LastMI = PrevMBB->getLastNonDebugInstr();
|
|
if (LastMI == PrevMBB->end())
|
|
// Drop DBG_VALUE for empty range.
|
|
History.pop_back();
|
|
else {
|
|
// Terminate after LastMI.
|
|
History.push_back(LastMI);
|
|
}
|
|
}
|
|
// Request labels for the full history.
|
|
for (unsigned i = 0, e = History.size(); i != e; ++i) {
|
|
const MachineInstr *MI = History[i];
|
|
if (MI->isDebugValue())
|
|
requestLabelBeforeInsn(MI);
|
|
else
|
|
requestLabelAfterInsn(MI);
|
|
}
|
|
}
|
|
|
|
PrevInstLoc = DebugLoc();
|
|
PrevLabel = FunctionBeginSym;
|
|
|
|
// Record beginning of function.
|
|
if (!PrologEndLoc.isUnknown()) {
|
|
DebugLoc FnStartDL = getFnDebugLoc(PrologEndLoc,
|
|
MF->getFunction()->getContext());
|
|
recordSourceLine(FnStartDL.getLine(), FnStartDL.getCol(),
|
|
FnStartDL.getScope(MF->getFunction()->getContext()),
|
|
DWARF2_FLAG_IS_STMT);
|
|
}
|
|
}
|
|
|
|
/// endFunction - Gather and emit post-function debug information.
|
|
///
|
|
void DwarfDebug::endFunction(const MachineFunction *MF) {
|
|
if (!MMI->hasDebugInfo() || DbgScopeMap.empty()) return;
|
|
|
|
if (CurrentFnDbgScope) {
|
|
|
|
// Define end label for subprogram.
|
|
FunctionEndSym = Asm->GetTempSymbol("func_end",
|
|
Asm->getFunctionNumber());
|
|
// Assumes in correct section after the entry point.
|
|
Asm->OutStreamer.EmitLabel(FunctionEndSym);
|
|
|
|
SmallPtrSet<const MDNode *, 16> ProcessedVars;
|
|
collectVariableInfo(MF, ProcessedVars);
|
|
|
|
// Construct abstract scopes.
|
|
for (SmallVector<DbgScope *, 4>::iterator AI = AbstractScopesList.begin(),
|
|
AE = AbstractScopesList.end(); AI != AE; ++AI) {
|
|
DISubprogram SP((*AI)->getScopeNode());
|
|
if (SP.Verify()) {
|
|
// Collect info for variables that were optimized out.
|
|
StringRef FName = SP.getLinkageName();
|
|
if (FName.empty())
|
|
FName = SP.getName();
|
|
if (NamedMDNode *NMD =
|
|
getFnSpecificMDNode(*(MF->getFunction()->getParent()), FName)) {
|
|
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
|
|
DIVariable DV(cast<MDNode>(NMD->getOperand(i)));
|
|
if (!DV || !ProcessedVars.insert(DV))
|
|
continue;
|
|
DbgScope *Scope = AbstractScopes.lookup(DV.getContext());
|
|
if (Scope)
|
|
Scope->addVariable(new DbgVariable(DV));
|
|
}
|
|
}
|
|
}
|
|
if (ProcessedSPNodes.count((*AI)->getScopeNode()) == 0)
|
|
constructScopeDIE(*AI);
|
|
}
|
|
|
|
DIE *CurFnDIE = constructScopeDIE(CurrentFnDbgScope);
|
|
|
|
if (!DisableFramePointerElim(*MF))
|
|
getCompileUnit(CurrentFnDbgScope->getScopeNode())->addUInt(CurFnDIE,
|
|
dwarf::DW_AT_APPLE_omit_frame_ptr,
|
|
dwarf::DW_FORM_flag, 1);
|
|
|
|
|
|
DebugFrames.push_back(FunctionDebugFrameInfo(Asm->getFunctionNumber(),
|
|
MMI->getFrameMoves()));
|
|
}
|
|
|
|
// Clear debug info
|
|
CurrentFnDbgScope = NULL;
|
|
DeleteContainerPointers(CurrentFnArguments);
|
|
DbgVariableToFrameIndexMap.clear();
|
|
VarToAbstractVarMap.clear();
|
|
DbgVariableToDbgInstMap.clear();
|
|
DeleteContainerSeconds(DbgScopeMap);
|
|
UserVariables.clear();
|
|
DbgValues.clear();
|
|
ConcreteScopes.clear();
|
|
DeleteContainerSeconds(AbstractScopes);
|
|
AbstractScopesList.clear();
|
|
AbstractVariables.clear();
|
|
LabelsBeforeInsn.clear();
|
|
LabelsAfterInsn.clear();
|
|
PrevLabel = NULL;
|
|
}
|
|
|
|
/// recordVariableFrameIndex - Record a variable's index.
|
|
void DwarfDebug::recordVariableFrameIndex(const DbgVariable *V, int Index) {
|
|
assert (V && "Invalid DbgVariable!");
|
|
DbgVariableToFrameIndexMap[V] = Index;
|
|
}
|
|
|
|
/// findVariableFrameIndex - Return true if frame index for the variable
|
|
/// is found. Update FI to hold value of the index.
|
|
bool DwarfDebug::findVariableFrameIndex(const DbgVariable *V, int *FI) {
|
|
assert (V && "Invalid DbgVariable!");
|
|
DenseMap<const DbgVariable *, int>::iterator I =
|
|
DbgVariableToFrameIndexMap.find(V);
|
|
if (I == DbgVariableToFrameIndexMap.end())
|
|
return false;
|
|
*FI = I->second;
|
|
return true;
|
|
}
|
|
|
|
/// findDbgScope - Find DbgScope for the debug loc attached with an
|
|
/// instruction.
|
|
DbgScope *DwarfDebug::findDbgScope(const MachineInstr *MInsn) {
|
|
DbgScope *Scope = NULL;
|
|
LLVMContext &Ctx =
|
|
MInsn->getParent()->getParent()->getFunction()->getContext();
|
|
DebugLoc DL = MInsn->getDebugLoc();
|
|
|
|
if (DL.isUnknown())
|
|
return Scope;
|
|
|
|
if (const MDNode *IA = DL.getInlinedAt(Ctx))
|
|
Scope = ConcreteScopes.lookup(IA);
|
|
if (Scope == 0)
|
|
Scope = DbgScopeMap.lookup(DL.getScope(Ctx));
|
|
|
|
return Scope;
|
|
}
|
|
|
|
|
|
/// recordSourceLine - Register a source line with debug info. Returns the
|
|
/// unique label that was emitted and which provides correspondence to
|
|
/// the source line list.
|
|
void DwarfDebug::recordSourceLine(unsigned Line, unsigned Col, const MDNode *S,
|
|
unsigned Flags) {
|
|
StringRef Fn;
|
|
StringRef Dir;
|
|
unsigned Src = 1;
|
|
if (S) {
|
|
DIDescriptor Scope(S);
|
|
|
|
if (Scope.isCompileUnit()) {
|
|
DICompileUnit CU(S);
|
|
Fn = CU.getFilename();
|
|
Dir = CU.getDirectory();
|
|
} else if (Scope.isFile()) {
|
|
DIFile F(S);
|
|
Fn = F.getFilename();
|
|
Dir = F.getDirectory();
|
|
} else if (Scope.isSubprogram()) {
|
|
DISubprogram SP(S);
|
|
Fn = SP.getFilename();
|
|
Dir = SP.getDirectory();
|
|
} else if (Scope.isLexicalBlock()) {
|
|
DILexicalBlock DB(S);
|
|
Fn = DB.getFilename();
|
|
Dir = DB.getDirectory();
|
|
} else
|
|
assert(0 && "Unexpected scope info");
|
|
|
|
Src = GetOrCreateSourceID(Fn, Dir);
|
|
}
|
|
Asm->OutStreamer.EmitDwarfLocDirective(Src, Line, Col, Flags,
|
|
0, 0, Fn);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Emit Methods
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
/// computeSizeAndOffset - Compute the size and offset of a DIE.
|
|
///
|
|
unsigned
|
|
DwarfDebug::computeSizeAndOffset(DIE *Die, unsigned Offset, bool Last) {
|
|
// Get the children.
|
|
const std::vector<DIE *> &Children = Die->getChildren();
|
|
|
|
// If not last sibling and has children then add sibling offset attribute.
|
|
if (!Last && !Children.empty())
|
|
Die->addSiblingOffset(DIEValueAllocator);
|
|
|
|
// Record the abbreviation.
|
|
assignAbbrevNumber(Die->getAbbrev());
|
|
|
|
// Get the abbreviation for this DIE.
|
|
unsigned AbbrevNumber = Die->getAbbrevNumber();
|
|
const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
|
|
|
|
// Set DIE offset
|
|
Die->setOffset(Offset);
|
|
|
|
// Start the size with the size of abbreviation code.
|
|
Offset += MCAsmInfo::getULEB128Size(AbbrevNumber);
|
|
|
|
const SmallVector<DIEValue*, 32> &Values = Die->getValues();
|
|
const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
|
|
|
|
// Size the DIE attribute values.
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i)
|
|
// Size attribute value.
|
|
Offset += Values[i]->SizeOf(Asm, AbbrevData[i].getForm());
|
|
|
|
// Size the DIE children if any.
|
|
if (!Children.empty()) {
|
|
assert(Abbrev->getChildrenFlag() == dwarf::DW_CHILDREN_yes &&
|
|
"Children flag not set");
|
|
|
|
for (unsigned j = 0, M = Children.size(); j < M; ++j)
|
|
Offset = computeSizeAndOffset(Children[j], Offset, (j + 1) == M);
|
|
|
|
// End of children marker.
|
|
Offset += sizeof(int8_t);
|
|
}
|
|
|
|
Die->setSize(Offset - Die->getOffset());
|
|
return Offset;
|
|
}
|
|
|
|
/// computeSizeAndOffsets - Compute the size and offset of all the DIEs.
|
|
///
|
|
void DwarfDebug::computeSizeAndOffsets() {
|
|
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
|
|
E = CUMap.end(); I != E; ++I) {
|
|
// Compute size of compile unit header.
|
|
unsigned Offset =
|
|
sizeof(int32_t) + // Length of Compilation Unit Info
|
|
sizeof(int16_t) + // DWARF version number
|
|
sizeof(int32_t) + // Offset Into Abbrev. Section
|
|
sizeof(int8_t); // Pointer Size (in bytes)
|
|
computeSizeAndOffset(I->second->getCUDie(), Offset, true);
|
|
}
|
|
}
|
|
|
|
/// EmitSectionSym - Switch to the specified MCSection and emit an assembler
|
|
/// temporary label to it if SymbolStem is specified.
|
|
static MCSymbol *EmitSectionSym(AsmPrinter *Asm, const MCSection *Section,
|
|
const char *SymbolStem = 0) {
|
|
Asm->OutStreamer.SwitchSection(Section);
|
|
if (!SymbolStem) return 0;
|
|
|
|
MCSymbol *TmpSym = Asm->GetTempSymbol(SymbolStem);
|
|
Asm->OutStreamer.EmitLabel(TmpSym);
|
|
return TmpSym;
|
|
}
|
|
|
|
/// EmitSectionLabels - Emit initial Dwarf sections with a label at
|
|
/// the start of each one.
|
|
void DwarfDebug::EmitSectionLabels() {
|
|
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
|
|
|
|
// Dwarf sections base addresses.
|
|
DwarfInfoSectionSym =
|
|
EmitSectionSym(Asm, TLOF.getDwarfInfoSection(), "section_info");
|
|
DwarfAbbrevSectionSym =
|
|
EmitSectionSym(Asm, TLOF.getDwarfAbbrevSection(), "section_abbrev");
|
|
EmitSectionSym(Asm, TLOF.getDwarfARangesSection());
|
|
|
|
if (const MCSection *MacroInfo = TLOF.getDwarfMacroInfoSection())
|
|
EmitSectionSym(Asm, MacroInfo);
|
|
|
|
EmitSectionSym(Asm, TLOF.getDwarfLineSection(), "section_line");
|
|
EmitSectionSym(Asm, TLOF.getDwarfLocSection());
|
|
EmitSectionSym(Asm, TLOF.getDwarfPubNamesSection());
|
|
EmitSectionSym(Asm, TLOF.getDwarfPubTypesSection());
|
|
DwarfStrSectionSym =
|
|
EmitSectionSym(Asm, TLOF.getDwarfStrSection(), "section_str");
|
|
DwarfDebugRangeSectionSym = EmitSectionSym(Asm, TLOF.getDwarfRangesSection(),
|
|
"debug_range");
|
|
|
|
DwarfDebugLocSectionSym = EmitSectionSym(Asm, TLOF.getDwarfLocSection(),
|
|
"section_debug_loc");
|
|
|
|
TextSectionSym = EmitSectionSym(Asm, TLOF.getTextSection(), "text_begin");
|
|
EmitSectionSym(Asm, TLOF.getDataSection());
|
|
}
|
|
|
|
/// emitDIE - Recusively Emits a debug information entry.
|
|
///
|
|
void DwarfDebug::emitDIE(DIE *Die) {
|
|
// Get the abbreviation for this DIE.
|
|
unsigned AbbrevNumber = Die->getAbbrevNumber();
|
|
const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
|
|
|
|
// Emit the code (index) for the abbreviation.
|
|
if (Asm->isVerbose())
|
|
Asm->OutStreamer.AddComment("Abbrev [" + Twine(AbbrevNumber) + "] 0x" +
|
|
Twine::utohexstr(Die->getOffset()) + ":0x" +
|
|
Twine::utohexstr(Die->getSize()) + " " +
|
|
dwarf::TagString(Abbrev->getTag()));
|
|
Asm->EmitULEB128(AbbrevNumber);
|
|
|
|
const SmallVector<DIEValue*, 32> &Values = Die->getValues();
|
|
const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
|
|
|
|
// Emit the DIE attribute values.
|
|
for (unsigned i = 0, N = Values.size(); i < N; ++i) {
|
|
unsigned Attr = AbbrevData[i].getAttribute();
|
|
unsigned Form = AbbrevData[i].getForm();
|
|
assert(Form && "Too many attributes for DIE (check abbreviation)");
|
|
|
|
if (Asm->isVerbose())
|
|
Asm->OutStreamer.AddComment(dwarf::AttributeString(Attr));
|
|
|
|
switch (Attr) {
|
|
case dwarf::DW_AT_sibling:
|
|
Asm->EmitInt32(Die->getSiblingOffset());
|
|
break;
|
|
case dwarf::DW_AT_abstract_origin: {
|
|
DIEEntry *E = cast<DIEEntry>(Values[i]);
|
|
DIE *Origin = E->getEntry();
|
|
unsigned Addr = Origin->getOffset();
|
|
Asm->EmitInt32(Addr);
|
|
break;
|
|
}
|
|
case dwarf::DW_AT_ranges: {
|
|
// DW_AT_range Value encodes offset in debug_range section.
|
|
DIEInteger *V = cast<DIEInteger>(Values[i]);
|
|
|
|
if (Asm->MAI->doesDwarfUsesLabelOffsetForRanges()) {
|
|
Asm->EmitLabelPlusOffset(DwarfDebugRangeSectionSym,
|
|
V->getValue(),
|
|
4);
|
|
} else {
|
|
Asm->EmitLabelOffsetDifference(DwarfDebugRangeSectionSym,
|
|
V->getValue(),
|
|
DwarfDebugRangeSectionSym,
|
|
4);
|
|
}
|
|
break;
|
|
}
|
|
case dwarf::DW_AT_location: {
|
|
if (UseDotDebugLocEntry.count(Die) != 0) {
|
|
DIELabel *L = cast<DIELabel>(Values[i]);
|
|
Asm->EmitLabelDifference(L->getValue(), DwarfDebugLocSectionSym, 4);
|
|
} else
|
|
Values[i]->EmitValue(Asm, Form);
|
|
break;
|
|
}
|
|
case dwarf::DW_AT_accessibility: {
|
|
if (Asm->isVerbose()) {
|
|
DIEInteger *V = cast<DIEInteger>(Values[i]);
|
|
Asm->OutStreamer.AddComment(dwarf::AccessibilityString(V->getValue()));
|
|
}
|
|
Values[i]->EmitValue(Asm, Form);
|
|
break;
|
|
}
|
|
default:
|
|
// Emit an attribute using the defined form.
|
|
Values[i]->EmitValue(Asm, Form);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Emit the DIE children if any.
|
|
if (Abbrev->getChildrenFlag() == dwarf::DW_CHILDREN_yes) {
|
|
const std::vector<DIE *> &Children = Die->getChildren();
|
|
|
|
for (unsigned j = 0, M = Children.size(); j < M; ++j)
|
|
emitDIE(Children[j]);
|
|
|
|
if (Asm->isVerbose())
|
|
Asm->OutStreamer.AddComment("End Of Children Mark");
|
|
Asm->EmitInt8(0);
|
|
}
|
|
}
|
|
|
|
/// emitDebugInfo - Emit the debug info section.
|
|
///
|
|
void DwarfDebug::emitDebugInfo() {
|
|
// Start debug info section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfInfoSection());
|
|
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
|
|
E = CUMap.end(); I != E; ++I) {
|
|
CompileUnit *TheCU = I->second;
|
|
DIE *Die = TheCU->getCUDie();
|
|
|
|
// Emit the compile units header.
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("info_begin",
|
|
TheCU->getID()));
|
|
|
|
// Emit size of content not including length itself
|
|
unsigned ContentSize = Die->getSize() +
|
|
sizeof(int16_t) + // DWARF version number
|
|
sizeof(int32_t) + // Offset Into Abbrev. Section
|
|
sizeof(int8_t); // Pointer Size (in bytes)
|
|
|
|
Asm->OutStreamer.AddComment("Length of Compilation Unit Info");
|
|
Asm->EmitInt32(ContentSize);
|
|
Asm->OutStreamer.AddComment("DWARF version number");
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION);
|
|
Asm->OutStreamer.AddComment("Offset Into Abbrev. Section");
|
|
Asm->EmitSectionOffset(Asm->GetTempSymbol("abbrev_begin"),
|
|
DwarfAbbrevSectionSym);
|
|
Asm->OutStreamer.AddComment("Address Size (in bytes)");
|
|
Asm->EmitInt8(Asm->getTargetData().getPointerSize());
|
|
|
|
emitDIE(Die);
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("info_end", TheCU->getID()));
|
|
}
|
|
}
|
|
|
|
/// emitAbbreviations - Emit the abbreviation section.
|
|
///
|
|
void DwarfDebug::emitAbbreviations() const {
|
|
// Check to see if it is worth the effort.
|
|
if (!Abbreviations.empty()) {
|
|
// Start the debug abbrev section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfAbbrevSection());
|
|
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("abbrev_begin"));
|
|
|
|
// For each abbrevation.
|
|
for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
|
|
// Get abbreviation data
|
|
const DIEAbbrev *Abbrev = Abbreviations[i];
|
|
|
|
// Emit the abbrevations code (base 1 index.)
|
|
Asm->EmitULEB128(Abbrev->getNumber(), "Abbreviation Code");
|
|
|
|
// Emit the abbreviations data.
|
|
Abbrev->Emit(Asm);
|
|
}
|
|
|
|
// Mark end of abbreviations.
|
|
Asm->EmitULEB128(0, "EOM(3)");
|
|
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("abbrev_end"));
|
|
}
|
|
}
|
|
|
|
/// emitEndOfLineMatrix - Emit the last address of the section and the end of
|
|
/// the line matrix.
|
|
///
|
|
void DwarfDebug::emitEndOfLineMatrix(unsigned SectionEnd) {
|
|
// Define last address of section.
|
|
Asm->OutStreamer.AddComment("Extended Op");
|
|
Asm->EmitInt8(0);
|
|
|
|
Asm->OutStreamer.AddComment("Op size");
|
|
Asm->EmitInt8(Asm->getTargetData().getPointerSize() + 1);
|
|
Asm->OutStreamer.AddComment("DW_LNE_set_address");
|
|
Asm->EmitInt8(dwarf::DW_LNE_set_address);
|
|
|
|
Asm->OutStreamer.AddComment("Section end label");
|
|
|
|
Asm->OutStreamer.EmitSymbolValue(Asm->GetTempSymbol("section_end",SectionEnd),
|
|
Asm->getTargetData().getPointerSize(),
|
|
0/*AddrSpace*/);
|
|
|
|
// Mark end of matrix.
|
|
Asm->OutStreamer.AddComment("DW_LNE_end_sequence");
|
|
Asm->EmitInt8(0);
|
|
Asm->EmitInt8(1);
|
|
Asm->EmitInt8(1);
|
|
}
|
|
|
|
/// emitDebugPubNames - Emit visible names into a debug pubnames section.
|
|
///
|
|
void DwarfDebug::emitDebugPubNames() {
|
|
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
|
|
E = CUMap.end(); I != E; ++I) {
|
|
CompileUnit *TheCU = I->second;
|
|
// Start the dwarf pubnames section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfPubNamesSection());
|
|
|
|
Asm->OutStreamer.AddComment("Length of Public Names Info");
|
|
Asm->EmitLabelDifference(
|
|
Asm->GetTempSymbol("pubnames_end", TheCU->getID()),
|
|
Asm->GetTempSymbol("pubnames_begin", TheCU->getID()), 4);
|
|
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("pubnames_begin",
|
|
TheCU->getID()));
|
|
|
|
Asm->OutStreamer.AddComment("DWARF Version");
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION);
|
|
|
|
Asm->OutStreamer.AddComment("Offset of Compilation Unit Info");
|
|
Asm->EmitSectionOffset(Asm->GetTempSymbol("info_begin", TheCU->getID()),
|
|
DwarfInfoSectionSym);
|
|
|
|
Asm->OutStreamer.AddComment("Compilation Unit Length");
|
|
Asm->EmitLabelDifference(Asm->GetTempSymbol("info_end", TheCU->getID()),
|
|
Asm->GetTempSymbol("info_begin", TheCU->getID()),
|
|
4);
|
|
|
|
const StringMap<DIE*> &Globals = TheCU->getGlobals();
|
|
for (StringMap<DIE*>::const_iterator
|
|
GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
|
|
const char *Name = GI->getKeyData();
|
|
DIE *Entity = GI->second;
|
|
|
|
Asm->OutStreamer.AddComment("DIE offset");
|
|
Asm->EmitInt32(Entity->getOffset());
|
|
|
|
if (Asm->isVerbose())
|
|
Asm->OutStreamer.AddComment("External Name");
|
|
Asm->OutStreamer.EmitBytes(StringRef(Name, strlen(Name)+1), 0);
|
|
}
|
|
|
|
Asm->OutStreamer.AddComment("End Mark");
|
|
Asm->EmitInt32(0);
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("pubnames_end",
|
|
TheCU->getID()));
|
|
}
|
|
}
|
|
|
|
void DwarfDebug::emitDebugPubTypes() {
|
|
for (DenseMap<const MDNode *, CompileUnit *>::iterator I = CUMap.begin(),
|
|
E = CUMap.end(); I != E; ++I) {
|
|
CompileUnit *TheCU = I->second;
|
|
// Start the dwarf pubnames section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfPubTypesSection());
|
|
Asm->OutStreamer.AddComment("Length of Public Types Info");
|
|
Asm->EmitLabelDifference(
|
|
Asm->GetTempSymbol("pubtypes_end", TheCU->getID()),
|
|
Asm->GetTempSymbol("pubtypes_begin", TheCU->getID()), 4);
|
|
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("pubtypes_begin",
|
|
TheCU->getID()));
|
|
|
|
if (Asm->isVerbose()) Asm->OutStreamer.AddComment("DWARF Version");
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION);
|
|
|
|
Asm->OutStreamer.AddComment("Offset of Compilation Unit Info");
|
|
Asm->EmitSectionOffset(Asm->GetTempSymbol("info_begin", TheCU->getID()),
|
|
DwarfInfoSectionSym);
|
|
|
|
Asm->OutStreamer.AddComment("Compilation Unit Length");
|
|
Asm->EmitLabelDifference(Asm->GetTempSymbol("info_end", TheCU->getID()),
|
|
Asm->GetTempSymbol("info_begin", TheCU->getID()),
|
|
4);
|
|
|
|
const StringMap<DIE*> &Globals = TheCU->getGlobalTypes();
|
|
for (StringMap<DIE*>::const_iterator
|
|
GI = Globals.begin(), GE = Globals.end(); GI != GE; ++GI) {
|
|
const char *Name = GI->getKeyData();
|
|
DIE * Entity = GI->second;
|
|
|
|
if (Asm->isVerbose()) Asm->OutStreamer.AddComment("DIE offset");
|
|
Asm->EmitInt32(Entity->getOffset());
|
|
|
|
if (Asm->isVerbose()) Asm->OutStreamer.AddComment("External Name");
|
|
Asm->OutStreamer.EmitBytes(StringRef(Name, GI->getKeyLength()+1), 0);
|
|
}
|
|
|
|
Asm->OutStreamer.AddComment("End Mark");
|
|
Asm->EmitInt32(0);
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("pubtypes_end",
|
|
TheCU->getID()));
|
|
}
|
|
}
|
|
|
|
/// emitDebugStr - Emit visible names into a debug str section.
|
|
///
|
|
void DwarfDebug::emitDebugStr() {
|
|
// Check to see if it is worth the effort.
|
|
if (StringPool.empty()) return;
|
|
|
|
// Start the dwarf str section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfStrSection());
|
|
|
|
// Get all of the string pool entries and put them in an array by their ID so
|
|
// we can sort them.
|
|
SmallVector<std::pair<unsigned,
|
|
StringMapEntry<std::pair<MCSymbol*, unsigned> >*>, 64> Entries;
|
|
|
|
for (StringMap<std::pair<MCSymbol*, unsigned> >::iterator
|
|
I = StringPool.begin(), E = StringPool.end(); I != E; ++I)
|
|
Entries.push_back(std::make_pair(I->second.second, &*I));
|
|
|
|
array_pod_sort(Entries.begin(), Entries.end());
|
|
|
|
for (unsigned i = 0, e = Entries.size(); i != e; ++i) {
|
|
// Emit a label for reference from debug information entries.
|
|
Asm->OutStreamer.EmitLabel(Entries[i].second->getValue().first);
|
|
|
|
// Emit the string itself.
|
|
Asm->OutStreamer.EmitBytes(Entries[i].second->getKey(), 0/*addrspace*/);
|
|
}
|
|
}
|
|
|
|
/// emitDebugLoc - Emit visible names into a debug loc section.
|
|
///
|
|
void DwarfDebug::emitDebugLoc() {
|
|
if (DotDebugLocEntries.empty())
|
|
return;
|
|
|
|
for (SmallVector<DotDebugLocEntry, 4>::iterator
|
|
I = DotDebugLocEntries.begin(), E = DotDebugLocEntries.end();
|
|
I != E; ++I) {
|
|
DotDebugLocEntry &Entry = *I;
|
|
if (I + 1 != DotDebugLocEntries.end())
|
|
Entry.Merge(I+1);
|
|
}
|
|
|
|
// Start the dwarf loc section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfLocSection());
|
|
unsigned char Size = Asm->getTargetData().getPointerSize();
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_loc", 0));
|
|
unsigned index = 1;
|
|
for (SmallVector<DotDebugLocEntry, 4>::iterator
|
|
I = DotDebugLocEntries.begin(), E = DotDebugLocEntries.end();
|
|
I != E; ++I, ++index) {
|
|
DotDebugLocEntry &Entry = *I;
|
|
if (Entry.isMerged()) continue;
|
|
if (Entry.isEmpty()) {
|
|
Asm->OutStreamer.EmitIntValue(0, Size, /*addrspace*/0);
|
|
Asm->OutStreamer.EmitIntValue(0, Size, /*addrspace*/0);
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_loc", index));
|
|
} else {
|
|
Asm->OutStreamer.EmitSymbolValue(Entry.Begin, Size, 0);
|
|
Asm->OutStreamer.EmitSymbolValue(Entry.End, Size, 0);
|
|
DIVariable DV(Entry.Variable);
|
|
Asm->OutStreamer.AddComment("Loc expr size");
|
|
MCSymbol *begin = Asm->OutStreamer.getContext().CreateTempSymbol();
|
|
MCSymbol *end = Asm->OutStreamer.getContext().CreateTempSymbol();
|
|
Asm->EmitLabelDifference(end, begin, 2);
|
|
Asm->OutStreamer.EmitLabel(begin);
|
|
if (Entry.isConstant()) {
|
|
DIBasicType BTy(DV.getType());
|
|
if (BTy.Verify() &&
|
|
(BTy.getEncoding() == dwarf::DW_ATE_signed
|
|
|| BTy.getEncoding() == dwarf::DW_ATE_signed_char)) {
|
|
Asm->OutStreamer.AddComment("DW_OP_consts");
|
|
Asm->EmitInt8(dwarf::DW_OP_consts);
|
|
Asm->EmitSLEB128(Entry.getConstant());
|
|
} else {
|
|
Asm->OutStreamer.AddComment("DW_OP_constu");
|
|
Asm->EmitInt8(dwarf::DW_OP_constu);
|
|
Asm->EmitULEB128(Entry.getConstant());
|
|
}
|
|
} else if (DV.hasComplexAddress()) {
|
|
unsigned N = DV.getNumAddrElements();
|
|
unsigned i = 0;
|
|
if (N >= 2 && DV.getAddrElement(0) == DIBuilder::OpPlus) {
|
|
if (Entry.Loc.getOffset()) {
|
|
i = 2;
|
|
Asm->EmitDwarfRegOp(Entry.Loc);
|
|
Asm->OutStreamer.AddComment("DW_OP_deref");
|
|
Asm->EmitInt8(dwarf::DW_OP_deref);
|
|
Asm->OutStreamer.AddComment("DW_OP_plus_uconst");
|
|
Asm->EmitInt8(dwarf::DW_OP_plus_uconst);
|
|
Asm->EmitSLEB128(DV.getAddrElement(1));
|
|
} else {
|
|
// If first address element is OpPlus then emit
|
|
// DW_OP_breg + Offset instead of DW_OP_reg + Offset.
|
|
MachineLocation Loc(Entry.Loc.getReg(), DV.getAddrElement(1));
|
|
Asm->EmitDwarfRegOp(Loc);
|
|
i = 2;
|
|
}
|
|
} else {
|
|
Asm->EmitDwarfRegOp(Entry.Loc);
|
|
}
|
|
|
|
// Emit remaining complex address elements.
|
|
for (; i < N; ++i) {
|
|
uint64_t Element = DV.getAddrElement(i);
|
|
if (Element == DIBuilder::OpPlus) {
|
|
Asm->EmitInt8(dwarf::DW_OP_plus_uconst);
|
|
Asm->EmitULEB128(DV.getAddrElement(++i));
|
|
} else if (Element == DIBuilder::OpDeref)
|
|
Asm->EmitInt8(dwarf::DW_OP_deref);
|
|
else llvm_unreachable("unknown Opcode found in complex address");
|
|
}
|
|
} else {
|
|
// Regular entry.
|
|
Asm->EmitDwarfRegOp(Entry.Loc);
|
|
}
|
|
Asm->OutStreamer.EmitLabel(end);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// EmitDebugARanges - Emit visible names into a debug aranges section.
|
|
///
|
|
void DwarfDebug::EmitDebugARanges() {
|
|
// Start the dwarf aranges section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfARangesSection());
|
|
}
|
|
|
|
/// emitDebugRanges - Emit visible names into a debug ranges section.
|
|
///
|
|
void DwarfDebug::emitDebugRanges() {
|
|
// Start the dwarf ranges section.
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfRangesSection());
|
|
unsigned char Size = Asm->getTargetData().getPointerSize();
|
|
for (SmallVector<const MCSymbol *, 8>::iterator
|
|
I = DebugRangeSymbols.begin(), E = DebugRangeSymbols.end();
|
|
I != E; ++I) {
|
|
if (*I)
|
|
Asm->OutStreamer.EmitSymbolValue(const_cast<MCSymbol*>(*I), Size, 0);
|
|
else
|
|
Asm->OutStreamer.EmitIntValue(0, Size, /*addrspace*/0);
|
|
}
|
|
}
|
|
|
|
/// emitDebugMacInfo - Emit visible names into a debug macinfo section.
|
|
///
|
|
void DwarfDebug::emitDebugMacInfo() {
|
|
if (const MCSection *LineInfo =
|
|
Asm->getObjFileLowering().getDwarfMacroInfoSection()) {
|
|
// Start the dwarf macinfo section.
|
|
Asm->OutStreamer.SwitchSection(LineInfo);
|
|
}
|
|
}
|
|
|
|
/// emitDebugInlineInfo - Emit inline info using following format.
|
|
/// Section Header:
|
|
/// 1. length of section
|
|
/// 2. Dwarf version number
|
|
/// 3. address size.
|
|
///
|
|
/// Entries (one "entry" for each function that was inlined):
|
|
///
|
|
/// 1. offset into __debug_str section for MIPS linkage name, if exists;
|
|
/// otherwise offset into __debug_str for regular function name.
|
|
/// 2. offset into __debug_str section for regular function name.
|
|
/// 3. an unsigned LEB128 number indicating the number of distinct inlining
|
|
/// instances for the function.
|
|
///
|
|
/// The rest of the entry consists of a {die_offset, low_pc} pair for each
|
|
/// inlined instance; the die_offset points to the inlined_subroutine die in the
|
|
/// __debug_info section, and the low_pc is the starting address for the
|
|
/// inlining instance.
|
|
void DwarfDebug::emitDebugInlineInfo() {
|
|
if (!Asm->MAI->doesDwarfUsesInlineInfoSection())
|
|
return;
|
|
|
|
if (!FirstCU)
|
|
return;
|
|
|
|
Asm->OutStreamer.SwitchSection(
|
|
Asm->getObjFileLowering().getDwarfDebugInlineSection());
|
|
|
|
Asm->OutStreamer.AddComment("Length of Debug Inlined Information Entry");
|
|
Asm->EmitLabelDifference(Asm->GetTempSymbol("debug_inlined_end", 1),
|
|
Asm->GetTempSymbol("debug_inlined_begin", 1), 4);
|
|
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_inlined_begin", 1));
|
|
|
|
Asm->OutStreamer.AddComment("Dwarf Version");
|
|
Asm->EmitInt16(dwarf::DWARF_VERSION);
|
|
Asm->OutStreamer.AddComment("Address Size (in bytes)");
|
|
Asm->EmitInt8(Asm->getTargetData().getPointerSize());
|
|
|
|
for (SmallVector<const MDNode *, 4>::iterator I = InlinedSPNodes.begin(),
|
|
E = InlinedSPNodes.end(); I != E; ++I) {
|
|
|
|
const MDNode *Node = *I;
|
|
DenseMap<const MDNode *, SmallVector<InlineInfoLabels, 4> >::iterator II
|
|
= InlineInfo.find(Node);
|
|
SmallVector<InlineInfoLabels, 4> &Labels = II->second;
|
|
DISubprogram SP(Node);
|
|
StringRef LName = SP.getLinkageName();
|
|
StringRef Name = SP.getName();
|
|
|
|
Asm->OutStreamer.AddComment("MIPS linkage name");
|
|
if (LName.empty()) {
|
|
Asm->OutStreamer.EmitBytes(Name, 0);
|
|
Asm->OutStreamer.EmitIntValue(0, 1, 0); // nul terminator.
|
|
} else
|
|
Asm->EmitSectionOffset(getStringPoolEntry(getRealLinkageName(LName)),
|
|
DwarfStrSectionSym);
|
|
|
|
Asm->OutStreamer.AddComment("Function name");
|
|
Asm->EmitSectionOffset(getStringPoolEntry(Name), DwarfStrSectionSym);
|
|
Asm->EmitULEB128(Labels.size(), "Inline count");
|
|
|
|
for (SmallVector<InlineInfoLabels, 4>::iterator LI = Labels.begin(),
|
|
LE = Labels.end(); LI != LE; ++LI) {
|
|
if (Asm->isVerbose()) Asm->OutStreamer.AddComment("DIE offset");
|
|
Asm->EmitInt32(LI->second->getOffset());
|
|
|
|
if (Asm->isVerbose()) Asm->OutStreamer.AddComment("low_pc");
|
|
Asm->OutStreamer.EmitSymbolValue(LI->first,
|
|
Asm->getTargetData().getPointerSize(),0);
|
|
}
|
|
}
|
|
|
|
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("debug_inlined_end", 1));
|
|
}
|