150 lines
5.2 KiB
C++
150 lines
5.2 KiB
C++
//===-- llvm-symbolizer.cpp - Simple addr2line-like symbolizer ------------===//
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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 utility works much like "addr2line". It is able of transforming
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// tuples (module name, module offset) to code locations (function name,
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// file, line number, column number). It is targeted for compiler-rt tools
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// (especially AddressSanitizer and ThreadSanitizer) that can use it
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// to symbolize stack traces in their error reports.
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//
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//===----------------------------------------------------------------------===//
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#include "LLVMSymbolize.h"
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#include "llvm/ADT/StringRef.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/FileSystem.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/PrettyStackTrace.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 <cstdio>
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#include <cstring>
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#include <string>
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using namespace llvm;
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using namespace symbolize;
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static cl::opt<bool>
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ClUseSymbolTable("use-symbol-table", cl::init(true),
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cl::desc("Prefer names in symbol table to names "
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"in debug info"));
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static cl::opt<FunctionNameKind> ClPrintFunctions(
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"functions", cl::init(FunctionNameKind::LinkageName),
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cl::desc("Print function name for a given address:"),
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cl::values(clEnumValN(FunctionNameKind::None, "none", "omit function name"),
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clEnumValN(FunctionNameKind::ShortName, "short",
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"print short function name"),
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clEnumValN(FunctionNameKind::LinkageName, "linkage",
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"print function linkage name"),
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clEnumValEnd));
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static cl::opt<bool>
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ClPrintInlining("inlining", cl::init(true),
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cl::desc("Print all inlined frames for a given address"));
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static cl::opt<bool>
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ClDemangle("demangle", cl::init(true), cl::desc("Demangle function names"));
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static cl::opt<std::string> ClDefaultArch("default-arch", cl::init(""),
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cl::desc("Default architecture "
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"(for multi-arch objects)"));
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static cl::opt<std::string>
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ClBinaryName("obj", cl::init(""),
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cl::desc("Path to object file to be symbolized (if not provided, "
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"object file should be specified for each input line)"));
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static cl::list<std::string>
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ClDsymHint("dsym-hint", cl::ZeroOrMore,
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cl::desc("Path to .dSYM bundles to search for debug info for the "
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"object files"));
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static bool parseCommand(bool &IsData, std::string &ModuleName,
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uint64_t &ModuleOffset) {
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const char *kDataCmd = "DATA ";
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const char *kCodeCmd = "CODE ";
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const int kMaxInputStringLength = 1024;
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const char kDelimiters[] = " \n";
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char InputString[kMaxInputStringLength];
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if (!fgets(InputString, sizeof(InputString), stdin))
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return false;
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IsData = false;
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ModuleName = "";
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char *pos = InputString;
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if (strncmp(pos, kDataCmd, strlen(kDataCmd)) == 0) {
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IsData = true;
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pos += strlen(kDataCmd);
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} else if (strncmp(pos, kCodeCmd, strlen(kCodeCmd)) == 0) {
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IsData = false;
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pos += strlen(kCodeCmd);
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} else {
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// If no cmd, assume it's CODE.
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IsData = false;
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}
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// Skip delimiters and parse input filename (if needed).
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if (ClBinaryName == "") {
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pos += strspn(pos, kDelimiters);
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if (*pos == '"' || *pos == '\'') {
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char quote = *pos;
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pos++;
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char *end = strchr(pos, quote);
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if (!end)
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return false;
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ModuleName = std::string(pos, end - pos);
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pos = end + 1;
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} else {
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int name_length = strcspn(pos, kDelimiters);
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ModuleName = std::string(pos, name_length);
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pos += name_length;
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}
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} else {
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ModuleName = ClBinaryName;
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}
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// Skip delimiters and parse module offset.
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pos += strspn(pos, kDelimiters);
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int offset_length = strcspn(pos, kDelimiters);
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if (StringRef(pos, offset_length).getAsInteger(0, ModuleOffset))
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return false;
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return true;
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}
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int main(int argc, char **argv) {
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// Print stack trace if we signal out.
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sys::PrintStackTraceOnErrorSignal();
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PrettyStackTraceProgram X(argc, argv);
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llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
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cl::ParseCommandLineOptions(argc, argv, "llvm-symbolizer\n");
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LLVMSymbolizer::Options Opts(ClUseSymbolTable, ClPrintFunctions,
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ClPrintInlining, ClDemangle, ClDefaultArch);
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for (const auto &hint : ClDsymHint) {
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if (sys::path::extension(hint) == ".dSYM") {
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Opts.DsymHints.push_back(hint);
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} else {
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errs() << "Warning: invalid dSYM hint: \"" << hint <<
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"\" (must have the '.dSYM' extension).\n";
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}
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}
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LLVMSymbolizer Symbolizer(Opts);
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bool IsData = false;
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std::string ModuleName;
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uint64_t ModuleOffset;
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while (parseCommand(IsData, ModuleName, ModuleOffset)) {
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std::string Result =
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IsData ? Symbolizer.symbolizeData(ModuleName, ModuleOffset)
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: Symbolizer.symbolizeCode(ModuleName, ModuleOffset);
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outs() << Result << "\n";
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outs().flush();
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}
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return 0;
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}
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