977 lines
34 KiB
C++
977 lines
34 KiB
C++
//===-- llvm-bcanalyzer.cpp - Bitcode Analyzer --------------------------===//
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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 tool may be invoked in the following manner:
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// llvm-bcanalyzer [options] - Read LLVM bitcode from stdin
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// llvm-bcanalyzer [options] x.bc - Read LLVM bitcode from the x.bc file
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//
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// Options:
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// --help - Output information about command line switches
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// --dump - Dump low-level bitcode structure in readable format
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//
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// This tool provides analytical information about a bitcode file. It is
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// intended as an aid to developers of bitcode reading and writing software. It
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// produces on std::out a summary of the bitcode file that shows various
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// statistics about the contents of the file. By default this information is
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// detailed and contains information about individual bitcode blocks and the
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// functions in the module.
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// The tool is also able to print a bitcode file in a straight forward text
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// format that shows the containment and relationships of the information in
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// the bitcode file (-dump option).
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/Bitcode/BitcodeReader.h"
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#include "llvm/Bitcode/BitstreamReader.h"
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#include "llvm/Bitcode/LLVMBitCodes.h"
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#include "llvm/IR/Verifier.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Support/PrettyStackTrace.h"
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#include "llvm/Support/SHA1.h"
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#include "llvm/Support/Signals.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cctype>
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#include <map>
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#include <system_error>
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using namespace llvm;
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static cl::opt<std::string>
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InputFilename(cl::Positional, cl::desc("<input bitcode>"), cl::init("-"));
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static cl::opt<bool> Dump("dump", cl::desc("Dump low level bitcode trace"));
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//===----------------------------------------------------------------------===//
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// Bitcode specific analysis.
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//===----------------------------------------------------------------------===//
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static cl::opt<bool> NoHistogram("disable-histogram",
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cl::desc("Do not print per-code histogram"));
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static cl::opt<bool>
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NonSymbolic("non-symbolic",
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cl::desc("Emit numeric info in dump even if"
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" symbolic info is available"));
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static cl::opt<std::string>
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BlockInfoFilename("block-info",
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cl::desc("Use the BLOCK_INFO from the given file"));
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static cl::opt<bool>
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ShowBinaryBlobs("show-binary-blobs",
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cl::desc("Print binary blobs using hex escapes"));
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static cl::opt<std::string> CheckHash(
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"check-hash",
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cl::desc("Check module hash using the argument as a string table"));
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namespace {
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/// CurStreamTypeType - A type for CurStreamType
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enum CurStreamTypeType {
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UnknownBitstream,
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LLVMIRBitstream
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};
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}
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/// GetBlockName - Return a symbolic block name if known, otherwise return
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/// null.
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static const char *GetBlockName(unsigned BlockID,
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const BitstreamBlockInfo &BlockInfo,
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CurStreamTypeType CurStreamType) {
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// Standard blocks for all bitcode files.
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if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
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if (BlockID == bitc::BLOCKINFO_BLOCK_ID)
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return "BLOCKINFO_BLOCK";
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return nullptr;
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}
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// Check to see if we have a blockinfo record for this block, with a name.
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if (const BitstreamBlockInfo::BlockInfo *Info =
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BlockInfo.getBlockInfo(BlockID)) {
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if (!Info->Name.empty())
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return Info->Name.c_str();
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}
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if (CurStreamType != LLVMIRBitstream) return nullptr;
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switch (BlockID) {
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default: return nullptr;
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case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID: return "OPERAND_BUNDLE_TAGS_BLOCK";
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case bitc::MODULE_BLOCK_ID: return "MODULE_BLOCK";
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case bitc::PARAMATTR_BLOCK_ID: return "PARAMATTR_BLOCK";
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case bitc::PARAMATTR_GROUP_BLOCK_ID: return "PARAMATTR_GROUP_BLOCK_ID";
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case bitc::TYPE_BLOCK_ID_NEW: return "TYPE_BLOCK_ID";
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case bitc::CONSTANTS_BLOCK_ID: return "CONSTANTS_BLOCK";
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case bitc::FUNCTION_BLOCK_ID: return "FUNCTION_BLOCK";
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case bitc::IDENTIFICATION_BLOCK_ID:
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return "IDENTIFICATION_BLOCK_ID";
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case bitc::VALUE_SYMTAB_BLOCK_ID: return "VALUE_SYMTAB";
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case bitc::METADATA_BLOCK_ID: return "METADATA_BLOCK";
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case bitc::METADATA_KIND_BLOCK_ID: return "METADATA_KIND_BLOCK";
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case bitc::METADATA_ATTACHMENT_ID: return "METADATA_ATTACHMENT_BLOCK";
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case bitc::USELIST_BLOCK_ID: return "USELIST_BLOCK_ID";
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case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
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return "GLOBALVAL_SUMMARY_BLOCK";
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case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
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return "FULL_LTO_GLOBALVAL_SUMMARY_BLOCK";
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case bitc::MODULE_STRTAB_BLOCK_ID: return "MODULE_STRTAB_BLOCK";
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case bitc::STRTAB_BLOCK_ID: return "STRTAB_BLOCK";
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case bitc::SYMTAB_BLOCK_ID: return "SYMTAB_BLOCK";
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}
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}
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/// GetCodeName - Return a symbolic code name if known, otherwise return
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/// null.
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static const char *GetCodeName(unsigned CodeID, unsigned BlockID,
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const BitstreamBlockInfo &BlockInfo,
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CurStreamTypeType CurStreamType) {
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// Standard blocks for all bitcode files.
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if (BlockID < bitc::FIRST_APPLICATION_BLOCKID) {
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if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
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switch (CodeID) {
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default: return nullptr;
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case bitc::BLOCKINFO_CODE_SETBID: return "SETBID";
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case bitc::BLOCKINFO_CODE_BLOCKNAME: return "BLOCKNAME";
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case bitc::BLOCKINFO_CODE_SETRECORDNAME: return "SETRECORDNAME";
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}
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}
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return nullptr;
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}
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// Check to see if we have a blockinfo record for this record, with a name.
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if (const BitstreamBlockInfo::BlockInfo *Info =
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BlockInfo.getBlockInfo(BlockID)) {
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for (unsigned i = 0, e = Info->RecordNames.size(); i != e; ++i)
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if (Info->RecordNames[i].first == CodeID)
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return Info->RecordNames[i].second.c_str();
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}
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if (CurStreamType != LLVMIRBitstream) return nullptr;
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#define STRINGIFY_CODE(PREFIX, CODE) \
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case bitc::PREFIX##_##CODE: \
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return #CODE;
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switch (BlockID) {
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default: return nullptr;
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case bitc::MODULE_BLOCK_ID:
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switch (CodeID) {
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default: return nullptr;
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STRINGIFY_CODE(MODULE_CODE, VERSION)
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STRINGIFY_CODE(MODULE_CODE, TRIPLE)
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STRINGIFY_CODE(MODULE_CODE, DATALAYOUT)
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STRINGIFY_CODE(MODULE_CODE, ASM)
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STRINGIFY_CODE(MODULE_CODE, SECTIONNAME)
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STRINGIFY_CODE(MODULE_CODE, DEPLIB) // FIXME: Remove in 4.0
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STRINGIFY_CODE(MODULE_CODE, GLOBALVAR)
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STRINGIFY_CODE(MODULE_CODE, FUNCTION)
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STRINGIFY_CODE(MODULE_CODE, ALIAS)
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STRINGIFY_CODE(MODULE_CODE, GCNAME)
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STRINGIFY_CODE(MODULE_CODE, VSTOFFSET)
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STRINGIFY_CODE(MODULE_CODE, METADATA_VALUES_UNUSED)
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STRINGIFY_CODE(MODULE_CODE, SOURCE_FILENAME)
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STRINGIFY_CODE(MODULE_CODE, HASH)
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}
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case bitc::IDENTIFICATION_BLOCK_ID:
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switch (CodeID) {
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default:
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return nullptr;
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STRINGIFY_CODE(IDENTIFICATION_CODE, STRING)
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STRINGIFY_CODE(IDENTIFICATION_CODE, EPOCH)
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}
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case bitc::PARAMATTR_BLOCK_ID:
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switch (CodeID) {
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default: return nullptr;
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// FIXME: Should these be different?
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case bitc::PARAMATTR_CODE_ENTRY_OLD: return "ENTRY";
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case bitc::PARAMATTR_CODE_ENTRY: return "ENTRY";
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}
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case bitc::PARAMATTR_GROUP_BLOCK_ID:
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switch (CodeID) {
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default: return nullptr;
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case bitc::PARAMATTR_GRP_CODE_ENTRY: return "ENTRY";
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}
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case bitc::TYPE_BLOCK_ID_NEW:
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switch (CodeID) {
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default: return nullptr;
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STRINGIFY_CODE(TYPE_CODE, NUMENTRY)
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STRINGIFY_CODE(TYPE_CODE, VOID)
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STRINGIFY_CODE(TYPE_CODE, FLOAT)
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STRINGIFY_CODE(TYPE_CODE, DOUBLE)
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STRINGIFY_CODE(TYPE_CODE, LABEL)
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STRINGIFY_CODE(TYPE_CODE, OPAQUE)
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STRINGIFY_CODE(TYPE_CODE, INTEGER)
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STRINGIFY_CODE(TYPE_CODE, POINTER)
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STRINGIFY_CODE(TYPE_CODE, ARRAY)
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STRINGIFY_CODE(TYPE_CODE, VECTOR)
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STRINGIFY_CODE(TYPE_CODE, X86_FP80)
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STRINGIFY_CODE(TYPE_CODE, FP128)
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STRINGIFY_CODE(TYPE_CODE, PPC_FP128)
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STRINGIFY_CODE(TYPE_CODE, METADATA)
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STRINGIFY_CODE(TYPE_CODE, STRUCT_ANON)
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STRINGIFY_CODE(TYPE_CODE, STRUCT_NAME)
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STRINGIFY_CODE(TYPE_CODE, STRUCT_NAMED)
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STRINGIFY_CODE(TYPE_CODE, FUNCTION)
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}
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case bitc::CONSTANTS_BLOCK_ID:
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switch (CodeID) {
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default: return nullptr;
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STRINGIFY_CODE(CST_CODE, SETTYPE)
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STRINGIFY_CODE(CST_CODE, NULL)
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STRINGIFY_CODE(CST_CODE, UNDEF)
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STRINGIFY_CODE(CST_CODE, INTEGER)
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STRINGIFY_CODE(CST_CODE, WIDE_INTEGER)
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STRINGIFY_CODE(CST_CODE, FLOAT)
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STRINGIFY_CODE(CST_CODE, AGGREGATE)
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STRINGIFY_CODE(CST_CODE, STRING)
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STRINGIFY_CODE(CST_CODE, CSTRING)
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STRINGIFY_CODE(CST_CODE, CE_BINOP)
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STRINGIFY_CODE(CST_CODE, CE_CAST)
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STRINGIFY_CODE(CST_CODE, CE_GEP)
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STRINGIFY_CODE(CST_CODE, CE_INBOUNDS_GEP)
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STRINGIFY_CODE(CST_CODE, CE_SELECT)
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STRINGIFY_CODE(CST_CODE, CE_EXTRACTELT)
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STRINGIFY_CODE(CST_CODE, CE_INSERTELT)
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STRINGIFY_CODE(CST_CODE, CE_SHUFFLEVEC)
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STRINGIFY_CODE(CST_CODE, CE_CMP)
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STRINGIFY_CODE(CST_CODE, INLINEASM)
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STRINGIFY_CODE(CST_CODE, CE_SHUFVEC_EX)
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case bitc::CST_CODE_BLOCKADDRESS: return "CST_CODE_BLOCKADDRESS";
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STRINGIFY_CODE(CST_CODE, DATA)
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}
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case bitc::FUNCTION_BLOCK_ID:
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switch (CodeID) {
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default: return nullptr;
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STRINGIFY_CODE(FUNC_CODE, DECLAREBLOCKS)
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STRINGIFY_CODE(FUNC_CODE, INST_BINOP)
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STRINGIFY_CODE(FUNC_CODE, INST_CAST)
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STRINGIFY_CODE(FUNC_CODE, INST_GEP_OLD)
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STRINGIFY_CODE(FUNC_CODE, INST_INBOUNDS_GEP_OLD)
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STRINGIFY_CODE(FUNC_CODE, INST_SELECT)
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STRINGIFY_CODE(FUNC_CODE, INST_EXTRACTELT)
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STRINGIFY_CODE(FUNC_CODE, INST_INSERTELT)
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STRINGIFY_CODE(FUNC_CODE, INST_SHUFFLEVEC)
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STRINGIFY_CODE(FUNC_CODE, INST_CMP)
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STRINGIFY_CODE(FUNC_CODE, INST_RET)
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STRINGIFY_CODE(FUNC_CODE, INST_BR)
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STRINGIFY_CODE(FUNC_CODE, INST_SWITCH)
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STRINGIFY_CODE(FUNC_CODE, INST_INVOKE)
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STRINGIFY_CODE(FUNC_CODE, INST_UNREACHABLE)
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STRINGIFY_CODE(FUNC_CODE, INST_CLEANUPRET)
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STRINGIFY_CODE(FUNC_CODE, INST_CATCHRET)
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STRINGIFY_CODE(FUNC_CODE, INST_CATCHPAD)
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STRINGIFY_CODE(FUNC_CODE, INST_PHI)
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STRINGIFY_CODE(FUNC_CODE, INST_ALLOCA)
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STRINGIFY_CODE(FUNC_CODE, INST_LOAD)
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STRINGIFY_CODE(FUNC_CODE, INST_VAARG)
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STRINGIFY_CODE(FUNC_CODE, INST_STORE)
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STRINGIFY_CODE(FUNC_CODE, INST_EXTRACTVAL)
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STRINGIFY_CODE(FUNC_CODE, INST_INSERTVAL)
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STRINGIFY_CODE(FUNC_CODE, INST_CMP2)
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STRINGIFY_CODE(FUNC_CODE, INST_VSELECT)
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STRINGIFY_CODE(FUNC_CODE, DEBUG_LOC_AGAIN)
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STRINGIFY_CODE(FUNC_CODE, INST_CALL)
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STRINGIFY_CODE(FUNC_CODE, DEBUG_LOC)
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STRINGIFY_CODE(FUNC_CODE, INST_GEP)
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STRINGIFY_CODE(FUNC_CODE, OPERAND_BUNDLE)
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}
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case bitc::VALUE_SYMTAB_BLOCK_ID:
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switch (CodeID) {
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default: return nullptr;
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STRINGIFY_CODE(VST_CODE, ENTRY)
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STRINGIFY_CODE(VST_CODE, BBENTRY)
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STRINGIFY_CODE(VST_CODE, FNENTRY)
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STRINGIFY_CODE(VST_CODE, COMBINED_ENTRY)
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}
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case bitc::MODULE_STRTAB_BLOCK_ID:
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switch (CodeID) {
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default:
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return nullptr;
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STRINGIFY_CODE(MST_CODE, ENTRY)
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STRINGIFY_CODE(MST_CODE, HASH)
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}
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case bitc::GLOBALVAL_SUMMARY_BLOCK_ID:
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case bitc::FULL_LTO_GLOBALVAL_SUMMARY_BLOCK_ID:
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switch (CodeID) {
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default:
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return nullptr;
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STRINGIFY_CODE(FS, PERMODULE)
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STRINGIFY_CODE(FS, PERMODULE_PROFILE)
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STRINGIFY_CODE(FS, PERMODULE_GLOBALVAR_INIT_REFS)
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STRINGIFY_CODE(FS, COMBINED)
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STRINGIFY_CODE(FS, COMBINED_PROFILE)
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STRINGIFY_CODE(FS, COMBINED_GLOBALVAR_INIT_REFS)
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STRINGIFY_CODE(FS, ALIAS)
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STRINGIFY_CODE(FS, COMBINED_ALIAS)
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STRINGIFY_CODE(FS, COMBINED_ORIGINAL_NAME)
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STRINGIFY_CODE(FS, VERSION)
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STRINGIFY_CODE(FS, TYPE_TESTS)
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STRINGIFY_CODE(FS, TYPE_TEST_ASSUME_VCALLS)
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STRINGIFY_CODE(FS, TYPE_CHECKED_LOAD_VCALLS)
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STRINGIFY_CODE(FS, TYPE_TEST_ASSUME_CONST_VCALL)
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STRINGIFY_CODE(FS, TYPE_CHECKED_LOAD_CONST_VCALL)
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STRINGIFY_CODE(FS, VALUE_GUID)
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STRINGIFY_CODE(FS, CFI_FUNCTION_DEFS)
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STRINGIFY_CODE(FS, CFI_FUNCTION_DECLS)
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}
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case bitc::METADATA_ATTACHMENT_ID:
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switch(CodeID) {
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default:return nullptr;
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STRINGIFY_CODE(METADATA, ATTACHMENT)
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}
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case bitc::METADATA_BLOCK_ID:
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switch(CodeID) {
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default:return nullptr;
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STRINGIFY_CODE(METADATA, STRING_OLD)
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STRINGIFY_CODE(METADATA, VALUE)
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STRINGIFY_CODE(METADATA, NODE)
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STRINGIFY_CODE(METADATA, NAME)
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STRINGIFY_CODE(METADATA, DISTINCT_NODE)
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STRINGIFY_CODE(METADATA, KIND) // Older bitcode has it in a MODULE_BLOCK
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STRINGIFY_CODE(METADATA, LOCATION)
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STRINGIFY_CODE(METADATA, OLD_NODE)
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STRINGIFY_CODE(METADATA, OLD_FN_NODE)
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STRINGIFY_CODE(METADATA, NAMED_NODE)
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STRINGIFY_CODE(METADATA, GENERIC_DEBUG)
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STRINGIFY_CODE(METADATA, SUBRANGE)
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STRINGIFY_CODE(METADATA, ENUMERATOR)
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STRINGIFY_CODE(METADATA, BASIC_TYPE)
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STRINGIFY_CODE(METADATA, FILE)
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STRINGIFY_CODE(METADATA, DERIVED_TYPE)
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STRINGIFY_CODE(METADATA, COMPOSITE_TYPE)
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STRINGIFY_CODE(METADATA, SUBROUTINE_TYPE)
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STRINGIFY_CODE(METADATA, COMPILE_UNIT)
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STRINGIFY_CODE(METADATA, SUBPROGRAM)
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STRINGIFY_CODE(METADATA, LEXICAL_BLOCK)
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STRINGIFY_CODE(METADATA, LEXICAL_BLOCK_FILE)
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STRINGIFY_CODE(METADATA, NAMESPACE)
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STRINGIFY_CODE(METADATA, TEMPLATE_TYPE)
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STRINGIFY_CODE(METADATA, TEMPLATE_VALUE)
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STRINGIFY_CODE(METADATA, GLOBAL_VAR)
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STRINGIFY_CODE(METADATA, LOCAL_VAR)
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STRINGIFY_CODE(METADATA, EXPRESSION)
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STRINGIFY_CODE(METADATA, OBJC_PROPERTY)
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STRINGIFY_CODE(METADATA, IMPORTED_ENTITY)
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STRINGIFY_CODE(METADATA, MODULE)
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STRINGIFY_CODE(METADATA, MACRO)
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STRINGIFY_CODE(METADATA, MACRO_FILE)
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STRINGIFY_CODE(METADATA, STRINGS)
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STRINGIFY_CODE(METADATA, GLOBAL_DECL_ATTACHMENT)
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STRINGIFY_CODE(METADATA, GLOBAL_VAR_EXPR)
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STRINGIFY_CODE(METADATA, INDEX_OFFSET)
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STRINGIFY_CODE(METADATA, INDEX)
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}
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case bitc::METADATA_KIND_BLOCK_ID:
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switch (CodeID) {
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default:
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return nullptr;
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STRINGIFY_CODE(METADATA, KIND)
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}
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case bitc::USELIST_BLOCK_ID:
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switch(CodeID) {
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default:return nullptr;
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case bitc::USELIST_CODE_DEFAULT: return "USELIST_CODE_DEFAULT";
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case bitc::USELIST_CODE_BB: return "USELIST_CODE_BB";
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}
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case bitc::OPERAND_BUNDLE_TAGS_BLOCK_ID:
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switch(CodeID) {
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default: return nullptr;
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case bitc::OPERAND_BUNDLE_TAG: return "OPERAND_BUNDLE_TAG";
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}
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case bitc::STRTAB_BLOCK_ID:
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switch(CodeID) {
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default: return nullptr;
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case bitc::STRTAB_BLOB: return "BLOB";
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}
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case bitc::SYMTAB_BLOCK_ID:
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switch(CodeID) {
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default: return nullptr;
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case bitc::SYMTAB_BLOB: return "BLOB";
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}
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}
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#undef STRINGIFY_CODE
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}
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struct PerRecordStats {
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unsigned NumInstances;
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unsigned NumAbbrev;
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uint64_t TotalBits;
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PerRecordStats() : NumInstances(0), NumAbbrev(0), TotalBits(0) {}
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};
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|
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struct PerBlockIDStats {
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/// NumInstances - This the number of times this block ID has been seen.
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unsigned NumInstances;
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|
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/// NumBits - The total size in bits of all of these blocks.
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uint64_t NumBits;
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/// NumSubBlocks - The total number of blocks these blocks contain.
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unsigned NumSubBlocks;
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/// NumAbbrevs - The total number of abbreviations.
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unsigned NumAbbrevs;
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|
|
/// NumRecords - The total number of records these blocks contain, and the
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/// number that are abbreviated.
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|
unsigned NumRecords, NumAbbreviatedRecords;
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|
|
/// CodeFreq - Keep track of the number of times we see each code.
|
|
std::vector<PerRecordStats> CodeFreq;
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|
|
PerBlockIDStats()
|
|
: NumInstances(0), NumBits(0),
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|
NumSubBlocks(0), NumAbbrevs(0), NumRecords(0), NumAbbreviatedRecords(0) {}
|
|
};
|
|
|
|
static std::map<unsigned, PerBlockIDStats> BlockIDStats;
|
|
|
|
|
|
|
|
/// ReportError - All bitcode analysis errors go through this function, making this a
|
|
/// good place to breakpoint if debugging.
|
|
static bool ReportError(const Twine &Err) {
|
|
errs() << Err << "\n";
|
|
return true;
|
|
}
|
|
|
|
static bool decodeMetadataStringsBlob(StringRef Indent,
|
|
ArrayRef<uint64_t> Record,
|
|
StringRef Blob) {
|
|
if (Blob.empty())
|
|
return true;
|
|
|
|
if (Record.size() != 2)
|
|
return true;
|
|
|
|
unsigned NumStrings = Record[0];
|
|
unsigned StringsOffset = Record[1];
|
|
outs() << " num-strings = " << NumStrings << " {\n";
|
|
|
|
StringRef Lengths = Blob.slice(0, StringsOffset);
|
|
SimpleBitstreamCursor R(Lengths);
|
|
StringRef Strings = Blob.drop_front(StringsOffset);
|
|
do {
|
|
if (R.AtEndOfStream())
|
|
return ReportError("bad length");
|
|
|
|
unsigned Size = R.ReadVBR(6);
|
|
if (Strings.size() < Size)
|
|
return ReportError("truncated chars");
|
|
|
|
outs() << Indent << " '";
|
|
outs().write_escaped(Strings.slice(0, Size), /*hex=*/true);
|
|
outs() << "'\n";
|
|
Strings = Strings.drop_front(Size);
|
|
} while (--NumStrings);
|
|
|
|
outs() << Indent << " }";
|
|
return false;
|
|
}
|
|
|
|
static bool decodeBlob(unsigned Code, unsigned BlockID, StringRef Indent,
|
|
ArrayRef<uint64_t> Record, StringRef Blob) {
|
|
if (BlockID != bitc::METADATA_BLOCK_ID)
|
|
return true;
|
|
if (Code != bitc::METADATA_STRINGS)
|
|
return true;
|
|
|
|
return decodeMetadataStringsBlob(Indent, Record, Blob);
|
|
}
|
|
|
|
/// ParseBlock - Read a block, updating statistics, etc.
|
|
static bool ParseBlock(BitstreamCursor &Stream, BitstreamBlockInfo &BlockInfo,
|
|
unsigned BlockID, unsigned IndentLevel,
|
|
CurStreamTypeType CurStreamType) {
|
|
std::string Indent(IndentLevel*2, ' ');
|
|
uint64_t BlockBitStart = Stream.GetCurrentBitNo();
|
|
|
|
// Get the statistics for this BlockID.
|
|
PerBlockIDStats &BlockStats = BlockIDStats[BlockID];
|
|
|
|
BlockStats.NumInstances++;
|
|
|
|
// BLOCKINFO is a special part of the stream.
|
|
bool DumpRecords = Dump;
|
|
if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
|
|
if (Dump) outs() << Indent << "<BLOCKINFO_BLOCK/>\n";
|
|
Optional<BitstreamBlockInfo> NewBlockInfo =
|
|
Stream.ReadBlockInfoBlock(/*ReadBlockInfoNames=*/true);
|
|
if (!NewBlockInfo)
|
|
return ReportError("Malformed BlockInfoBlock");
|
|
BlockInfo = std::move(*NewBlockInfo);
|
|
Stream.JumpToBit(BlockBitStart);
|
|
// It's not really interesting to dump the contents of the blockinfo block.
|
|
DumpRecords = false;
|
|
}
|
|
|
|
unsigned NumWords = 0;
|
|
if (Stream.EnterSubBlock(BlockID, &NumWords))
|
|
return ReportError("Malformed block record");
|
|
|
|
// Keep it for later, when we see a MODULE_HASH record
|
|
uint64_t BlockEntryPos = Stream.getCurrentByteNo();
|
|
|
|
const char *BlockName = nullptr;
|
|
if (DumpRecords) {
|
|
outs() << Indent << "<";
|
|
if ((BlockName = GetBlockName(BlockID, BlockInfo, CurStreamType)))
|
|
outs() << BlockName;
|
|
else
|
|
outs() << "UnknownBlock" << BlockID;
|
|
|
|
if (NonSymbolic && BlockName)
|
|
outs() << " BlockID=" << BlockID;
|
|
|
|
outs() << " NumWords=" << NumWords
|
|
<< " BlockCodeSize=" << Stream.getAbbrevIDWidth() << ">\n";
|
|
}
|
|
|
|
SmallVector<uint64_t, 64> Record;
|
|
|
|
// Keep the offset to the metadata index if seen.
|
|
uint64_t MetadataIndexOffset = 0;
|
|
|
|
// Read all the records for this block.
|
|
while (1) {
|
|
if (Stream.AtEndOfStream())
|
|
return ReportError("Premature end of bitstream");
|
|
|
|
uint64_t RecordStartBit = Stream.GetCurrentBitNo();
|
|
|
|
BitstreamEntry Entry =
|
|
Stream.advance(BitstreamCursor::AF_DontAutoprocessAbbrevs);
|
|
|
|
switch (Entry.Kind) {
|
|
case BitstreamEntry::Error:
|
|
return ReportError("malformed bitcode file");
|
|
case BitstreamEntry::EndBlock: {
|
|
uint64_t BlockBitEnd = Stream.GetCurrentBitNo();
|
|
BlockStats.NumBits += BlockBitEnd-BlockBitStart;
|
|
if (DumpRecords) {
|
|
outs() << Indent << "</";
|
|
if (BlockName)
|
|
outs() << BlockName << ">\n";
|
|
else
|
|
outs() << "UnknownBlock" << BlockID << ">\n";
|
|
}
|
|
return false;
|
|
}
|
|
|
|
case BitstreamEntry::SubBlock: {
|
|
uint64_t SubBlockBitStart = Stream.GetCurrentBitNo();
|
|
if (ParseBlock(Stream, BlockInfo, Entry.ID, IndentLevel + 1,
|
|
CurStreamType))
|
|
return true;
|
|
++BlockStats.NumSubBlocks;
|
|
uint64_t SubBlockBitEnd = Stream.GetCurrentBitNo();
|
|
|
|
// Don't include subblock sizes in the size of this block.
|
|
BlockBitStart += SubBlockBitEnd-SubBlockBitStart;
|
|
continue;
|
|
}
|
|
case BitstreamEntry::Record:
|
|
// The interesting case.
|
|
break;
|
|
}
|
|
|
|
if (Entry.ID == bitc::DEFINE_ABBREV) {
|
|
Stream.ReadAbbrevRecord();
|
|
++BlockStats.NumAbbrevs;
|
|
continue;
|
|
}
|
|
|
|
Record.clear();
|
|
|
|
++BlockStats.NumRecords;
|
|
|
|
StringRef Blob;
|
|
unsigned CurrentRecordPos = Stream.GetCurrentBitNo();
|
|
unsigned Code = Stream.readRecord(Entry.ID, Record, &Blob);
|
|
|
|
// Increment the # occurrences of this code.
|
|
if (BlockStats.CodeFreq.size() <= Code)
|
|
BlockStats.CodeFreq.resize(Code+1);
|
|
BlockStats.CodeFreq[Code].NumInstances++;
|
|
BlockStats.CodeFreq[Code].TotalBits +=
|
|
Stream.GetCurrentBitNo()-RecordStartBit;
|
|
if (Entry.ID != bitc::UNABBREV_RECORD) {
|
|
BlockStats.CodeFreq[Code].NumAbbrev++;
|
|
++BlockStats.NumAbbreviatedRecords;
|
|
}
|
|
|
|
if (DumpRecords) {
|
|
outs() << Indent << " <";
|
|
if (const char *CodeName =
|
|
GetCodeName(Code, BlockID, BlockInfo, CurStreamType))
|
|
outs() << CodeName;
|
|
else
|
|
outs() << "UnknownCode" << Code;
|
|
if (NonSymbolic && GetCodeName(Code, BlockID, BlockInfo, CurStreamType))
|
|
outs() << " codeid=" << Code;
|
|
const BitCodeAbbrev *Abbv = nullptr;
|
|
if (Entry.ID != bitc::UNABBREV_RECORD) {
|
|
Abbv = Stream.getAbbrev(Entry.ID);
|
|
outs() << " abbrevid=" << Entry.ID;
|
|
}
|
|
|
|
for (unsigned i = 0, e = Record.size(); i != e; ++i)
|
|
outs() << " op" << i << "=" << (int64_t)Record[i];
|
|
|
|
// If we found a metadata index, let's verify that we had an offset before
|
|
// and validate its forward reference offset was correct!
|
|
if (BlockID == bitc::METADATA_BLOCK_ID) {
|
|
if (Code == bitc::METADATA_INDEX_OFFSET) {
|
|
if (Record.size() != 2)
|
|
outs() << "(Invalid record)";
|
|
else {
|
|
auto Offset = Record[0] + (Record[1] << 32);
|
|
MetadataIndexOffset = Stream.GetCurrentBitNo() + Offset;
|
|
}
|
|
}
|
|
if (Code == bitc::METADATA_INDEX) {
|
|
outs() << " (offset ";
|
|
if (MetadataIndexOffset == RecordStartBit)
|
|
outs() << "match)";
|
|
else
|
|
outs() << "mismatch: " << MetadataIndexOffset << " vs "
|
|
<< RecordStartBit << ")";
|
|
}
|
|
}
|
|
|
|
// If we found a module hash, let's verify that it matches!
|
|
if (BlockID == bitc::MODULE_BLOCK_ID && Code == bitc::MODULE_CODE_HASH &&
|
|
!CheckHash.empty()) {
|
|
if (Record.size() != 5)
|
|
outs() << " (invalid)";
|
|
else {
|
|
// Recompute the hash and compare it to the one in the bitcode
|
|
SHA1 Hasher;
|
|
StringRef Hash;
|
|
Hasher.update(CheckHash);
|
|
{
|
|
int BlockSize = (CurrentRecordPos / 8) - BlockEntryPos;
|
|
auto Ptr = Stream.getPointerToByte(BlockEntryPos, BlockSize);
|
|
Hasher.update(ArrayRef<uint8_t>(Ptr, BlockSize));
|
|
Hash = Hasher.result();
|
|
}
|
|
SmallString<20> RecordedHash;
|
|
RecordedHash.resize(20);
|
|
int Pos = 0;
|
|
for (auto &Val : Record) {
|
|
assert(!(Val >> 32) && "Unexpected high bits set");
|
|
RecordedHash[Pos++] = (Val >> 24) & 0xFF;
|
|
RecordedHash[Pos++] = (Val >> 16) & 0xFF;
|
|
RecordedHash[Pos++] = (Val >> 8) & 0xFF;
|
|
RecordedHash[Pos++] = (Val >> 0) & 0xFF;
|
|
}
|
|
if (Hash == RecordedHash)
|
|
outs() << " (match)";
|
|
else
|
|
outs() << " (!mismatch!)";
|
|
}
|
|
}
|
|
|
|
outs() << "/>";
|
|
|
|
if (Abbv) {
|
|
for (unsigned i = 1, e = Abbv->getNumOperandInfos(); i != e; ++i) {
|
|
const BitCodeAbbrevOp &Op = Abbv->getOperandInfo(i);
|
|
if (!Op.isEncoding() || Op.getEncoding() != BitCodeAbbrevOp::Array)
|
|
continue;
|
|
assert(i + 2 == e && "Array op not second to last");
|
|
std::string Str;
|
|
bool ArrayIsPrintable = true;
|
|
for (unsigned j = i - 1, je = Record.size(); j != je; ++j) {
|
|
if (!isprint(static_cast<unsigned char>(Record[j]))) {
|
|
ArrayIsPrintable = false;
|
|
break;
|
|
}
|
|
Str += (char)Record[j];
|
|
}
|
|
if (ArrayIsPrintable)
|
|
outs() << " record string = '" << Str << "'";
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Blob.data() && decodeBlob(Code, BlockID, Indent, Record, Blob)) {
|
|
outs() << " blob data = ";
|
|
if (ShowBinaryBlobs) {
|
|
outs() << "'";
|
|
outs().write_escaped(Blob, /*hex=*/true) << "'";
|
|
} else {
|
|
bool BlobIsPrintable = true;
|
|
for (unsigned i = 0, e = Blob.size(); i != e; ++i)
|
|
if (!isprint(static_cast<unsigned char>(Blob[i]))) {
|
|
BlobIsPrintable = false;
|
|
break;
|
|
}
|
|
|
|
if (BlobIsPrintable)
|
|
outs() << "'" << Blob << "'";
|
|
else
|
|
outs() << "unprintable, " << Blob.size() << " bytes.";
|
|
}
|
|
}
|
|
|
|
outs() << "\n";
|
|
}
|
|
|
|
// Make sure that we can skip the current record.
|
|
Stream.JumpToBit(CurrentRecordPos);
|
|
Stream.skipRecord(Entry.ID);
|
|
}
|
|
}
|
|
|
|
static void PrintSize(double Bits) {
|
|
outs() << format("%.2f/%.2fB/%luW", Bits, Bits/8,(unsigned long)(Bits/32));
|
|
}
|
|
static void PrintSize(uint64_t Bits) {
|
|
outs() << format("%lub/%.2fB/%luW", (unsigned long)Bits,
|
|
(double)Bits/8, (unsigned long)(Bits/32));
|
|
}
|
|
|
|
static bool openBitcodeFile(StringRef Path,
|
|
std::unique_ptr<MemoryBuffer> &MemBuf,
|
|
BitstreamCursor &Stream,
|
|
CurStreamTypeType &CurStreamType) {
|
|
// Read the input file.
|
|
ErrorOr<std::unique_ptr<MemoryBuffer>> MemBufOrErr =
|
|
MemoryBuffer::getFileOrSTDIN(Path);
|
|
if (std::error_code EC = MemBufOrErr.getError())
|
|
return ReportError(Twine("ReportError reading '") + Path + "': " + EC.message());
|
|
MemBuf = std::move(MemBufOrErr.get());
|
|
|
|
if (MemBuf->getBufferSize() & 3)
|
|
return ReportError("Bitcode stream should be a multiple of 4 bytes in length");
|
|
|
|
const unsigned char *BufPtr = (const unsigned char *)MemBuf->getBufferStart();
|
|
const unsigned char *EndBufPtr = BufPtr + MemBuf->getBufferSize();
|
|
|
|
// If we have a wrapper header, parse it and ignore the non-bc file contents.
|
|
// The magic number is 0x0B17C0DE stored in little endian.
|
|
if (isBitcodeWrapper(BufPtr, EndBufPtr)) {
|
|
if (MemBuf->getBufferSize() < BWH_HeaderSize)
|
|
return ReportError("Invalid bitcode wrapper header");
|
|
|
|
if (Dump) {
|
|
unsigned Magic = support::endian::read32le(&BufPtr[BWH_MagicField]);
|
|
unsigned Version = support::endian::read32le(&BufPtr[BWH_VersionField]);
|
|
unsigned Offset = support::endian::read32le(&BufPtr[BWH_OffsetField]);
|
|
unsigned Size = support::endian::read32le(&BufPtr[BWH_SizeField]);
|
|
unsigned CPUType = support::endian::read32le(&BufPtr[BWH_CPUTypeField]);
|
|
|
|
outs() << "<BITCODE_WRAPPER_HEADER"
|
|
<< " Magic=" << format_hex(Magic, 10)
|
|
<< " Version=" << format_hex(Version, 10)
|
|
<< " Offset=" << format_hex(Offset, 10)
|
|
<< " Size=" << format_hex(Size, 10)
|
|
<< " CPUType=" << format_hex(CPUType, 10) << "/>\n";
|
|
}
|
|
|
|
if (SkipBitcodeWrapperHeader(BufPtr, EndBufPtr, true))
|
|
return ReportError("Invalid bitcode wrapper header");
|
|
}
|
|
|
|
Stream = BitstreamCursor(ArrayRef<uint8_t>(BufPtr, EndBufPtr));
|
|
|
|
// Read the stream signature.
|
|
char Signature[6];
|
|
Signature[0] = Stream.Read(8);
|
|
Signature[1] = Stream.Read(8);
|
|
Signature[2] = Stream.Read(4);
|
|
Signature[3] = Stream.Read(4);
|
|
Signature[4] = Stream.Read(4);
|
|
Signature[5] = Stream.Read(4);
|
|
|
|
// Autodetect the file contents, if it is one we know.
|
|
CurStreamType = UnknownBitstream;
|
|
if (Signature[0] == 'B' && Signature[1] == 'C' &&
|
|
Signature[2] == 0x0 && Signature[3] == 0xC &&
|
|
Signature[4] == 0xE && Signature[5] == 0xD)
|
|
CurStreamType = LLVMIRBitstream;
|
|
|
|
return false;
|
|
}
|
|
|
|
/// AnalyzeBitcode - Analyze the bitcode file specified by InputFilename.
|
|
static int AnalyzeBitcode() {
|
|
std::unique_ptr<MemoryBuffer> StreamBuffer;
|
|
BitstreamCursor Stream;
|
|
BitstreamBlockInfo BlockInfo;
|
|
CurStreamTypeType CurStreamType;
|
|
if (openBitcodeFile(InputFilename, StreamBuffer, Stream, CurStreamType))
|
|
return true;
|
|
Stream.setBlockInfo(&BlockInfo);
|
|
|
|
// Read block info from BlockInfoFilename, if specified.
|
|
// The block info must be a top-level block.
|
|
if (!BlockInfoFilename.empty()) {
|
|
std::unique_ptr<MemoryBuffer> BlockInfoBuffer;
|
|
BitstreamCursor BlockInfoCursor;
|
|
CurStreamTypeType BlockInfoStreamType;
|
|
if (openBitcodeFile(BlockInfoFilename, BlockInfoBuffer, BlockInfoCursor,
|
|
BlockInfoStreamType))
|
|
return true;
|
|
|
|
while (!BlockInfoCursor.AtEndOfStream()) {
|
|
unsigned Code = BlockInfoCursor.ReadCode();
|
|
if (Code != bitc::ENTER_SUBBLOCK)
|
|
return ReportError("Invalid record at top-level in block info file");
|
|
|
|
unsigned BlockID = BlockInfoCursor.ReadSubBlockID();
|
|
if (BlockID == bitc::BLOCKINFO_BLOCK_ID) {
|
|
Optional<BitstreamBlockInfo> NewBlockInfo =
|
|
BlockInfoCursor.ReadBlockInfoBlock(/*ReadBlockInfoNames=*/true);
|
|
if (!NewBlockInfo)
|
|
return ReportError("Malformed BlockInfoBlock in block info file");
|
|
BlockInfo = std::move(*NewBlockInfo);
|
|
break;
|
|
}
|
|
|
|
BlockInfoCursor.SkipBlock();
|
|
}
|
|
}
|
|
|
|
unsigned NumTopBlocks = 0;
|
|
|
|
// Parse the top-level structure. We only allow blocks at the top-level.
|
|
while (!Stream.AtEndOfStream()) {
|
|
unsigned Code = Stream.ReadCode();
|
|
if (Code != bitc::ENTER_SUBBLOCK)
|
|
return ReportError("Invalid record at top-level");
|
|
|
|
unsigned BlockID = Stream.ReadSubBlockID();
|
|
|
|
if (ParseBlock(Stream, BlockInfo, BlockID, 0, CurStreamType))
|
|
return true;
|
|
++NumTopBlocks;
|
|
}
|
|
|
|
if (Dump) outs() << "\n\n";
|
|
|
|
uint64_t BufferSizeBits = Stream.getBitcodeBytes().size() * CHAR_BIT;
|
|
// Print a summary of the read file.
|
|
outs() << "Summary of " << InputFilename << ":\n";
|
|
outs() << " Total size: ";
|
|
PrintSize(BufferSizeBits);
|
|
outs() << "\n";
|
|
outs() << " Stream type: ";
|
|
switch (CurStreamType) {
|
|
case UnknownBitstream: outs() << "unknown\n"; break;
|
|
case LLVMIRBitstream: outs() << "LLVM IR\n"; break;
|
|
}
|
|
outs() << " # Toplevel Blocks: " << NumTopBlocks << "\n";
|
|
outs() << "\n";
|
|
|
|
// Emit per-block stats.
|
|
outs() << "Per-block Summary:\n";
|
|
for (std::map<unsigned, PerBlockIDStats>::iterator I = BlockIDStats.begin(),
|
|
E = BlockIDStats.end(); I != E; ++I) {
|
|
outs() << " Block ID #" << I->first;
|
|
if (const char *BlockName =
|
|
GetBlockName(I->first, BlockInfo, CurStreamType))
|
|
outs() << " (" << BlockName << ")";
|
|
outs() << ":\n";
|
|
|
|
const PerBlockIDStats &Stats = I->second;
|
|
outs() << " Num Instances: " << Stats.NumInstances << "\n";
|
|
outs() << " Total Size: ";
|
|
PrintSize(Stats.NumBits);
|
|
outs() << "\n";
|
|
double pct = (Stats.NumBits * 100.0) / BufferSizeBits;
|
|
outs() << " Percent of file: " << format("%2.4f%%", pct) << "\n";
|
|
if (Stats.NumInstances > 1) {
|
|
outs() << " Average Size: ";
|
|
PrintSize(Stats.NumBits/(double)Stats.NumInstances);
|
|
outs() << "\n";
|
|
outs() << " Tot/Avg SubBlocks: " << Stats.NumSubBlocks << "/"
|
|
<< Stats.NumSubBlocks/(double)Stats.NumInstances << "\n";
|
|
outs() << " Tot/Avg Abbrevs: " << Stats.NumAbbrevs << "/"
|
|
<< Stats.NumAbbrevs/(double)Stats.NumInstances << "\n";
|
|
outs() << " Tot/Avg Records: " << Stats.NumRecords << "/"
|
|
<< Stats.NumRecords/(double)Stats.NumInstances << "\n";
|
|
} else {
|
|
outs() << " Num SubBlocks: " << Stats.NumSubBlocks << "\n";
|
|
outs() << " Num Abbrevs: " << Stats.NumAbbrevs << "\n";
|
|
outs() << " Num Records: " << Stats.NumRecords << "\n";
|
|
}
|
|
if (Stats.NumRecords) {
|
|
double pct = (Stats.NumAbbreviatedRecords * 100.0) / Stats.NumRecords;
|
|
outs() << " Percent Abbrevs: " << format("%2.4f%%", pct) << "\n";
|
|
}
|
|
outs() << "\n";
|
|
|
|
// Print a histogram of the codes we see.
|
|
if (!NoHistogram && !Stats.CodeFreq.empty()) {
|
|
std::vector<std::pair<unsigned, unsigned> > FreqPairs; // <freq,code>
|
|
for (unsigned i = 0, e = Stats.CodeFreq.size(); i != e; ++i)
|
|
if (unsigned Freq = Stats.CodeFreq[i].NumInstances)
|
|
FreqPairs.push_back(std::make_pair(Freq, i));
|
|
std::stable_sort(FreqPairs.begin(), FreqPairs.end());
|
|
std::reverse(FreqPairs.begin(), FreqPairs.end());
|
|
|
|
outs() << "\tRecord Histogram:\n";
|
|
outs() << "\t\t Count # Bits b/Rec % Abv Record Kind\n";
|
|
for (unsigned i = 0, e = FreqPairs.size(); i != e; ++i) {
|
|
const PerRecordStats &RecStats = Stats.CodeFreq[FreqPairs[i].second];
|
|
|
|
outs() << format("\t\t%7d %9lu",
|
|
RecStats.NumInstances,
|
|
(unsigned long)RecStats.TotalBits);
|
|
|
|
if (RecStats.NumInstances > 1)
|
|
outs() << format(" %9.1f",
|
|
(double)RecStats.TotalBits/RecStats.NumInstances);
|
|
else
|
|
outs() << " ";
|
|
|
|
if (RecStats.NumAbbrev)
|
|
outs() <<
|
|
format(" %7.2f",
|
|
(double)RecStats.NumAbbrev/RecStats.NumInstances*100);
|
|
else
|
|
outs() << " ";
|
|
|
|
outs() << " ";
|
|
if (const char *CodeName = GetCodeName(FreqPairs[i].second, I->first,
|
|
BlockInfo, CurStreamType))
|
|
outs() << CodeName << "\n";
|
|
else
|
|
outs() << "UnknownCode" << FreqPairs[i].second << "\n";
|
|
}
|
|
outs() << "\n";
|
|
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
int main(int argc, char **argv) {
|
|
// Print a stack trace if we signal out.
|
|
sys::PrintStackTraceOnErrorSignal(argv[0]);
|
|
PrettyStackTraceProgram X(argc, argv);
|
|
llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
|
|
cl::ParseCommandLineOptions(argc, argv, "llvm-bcanalyzer file analyzer\n");
|
|
|
|
return AnalyzeBitcode();
|
|
}
|