#include "LLVMSymbolize.h"
#include "llvm/ADT/STLExtras.h"
+#include "llvm/Config/config.h"
#include "llvm/Object/MachO.h"
#include "llvm/Support/Casting.h"
+#include "llvm/Support/Compression.h"
+#include "llvm/Support/DataExtractor.h"
#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include <sstream>
+#include <stdlib.h>
namespace llvm {
namespace symbolize {
StringRef SymbolName;
if (error(si->getName(SymbolName)))
continue;
+ // Mach-O symbol table names have leading underscore, skip it.
+ if (Module->isMachO() && SymbolName.size() > 0 && SymbolName[0] == '_')
+ SymbolName = SymbolName.drop_front();
// FIXME: If a function has alias, there are two entries in symbol table
// with same address size. Make sure we choose the correct one.
SymbolMapTy &M = SymbolType == SymbolRef::ST_Function ? Functions : Objects;
void LLVMSymbolizer::flush() {
DeleteContainerSeconds(Modules);
DeleteContainerPointers(ParsedBinariesAndObjects);
+ BinaryForPath.clear();
+ ObjectFileForArch.clear();
}
static std::string getDarwinDWARFResourceForPath(const std::string &Path) {
return ResourceName.str();
}
+static bool checkFileCRC(StringRef Path, uint32_t CRCHash) {
+ OwningPtr<MemoryBuffer> MB;
+ if (MemoryBuffer::getFileOrSTDIN(Path, MB))
+ return false;
+ return !zlib::isAvailable() || CRCHash == zlib::crc32(MB->getBuffer());
+}
+
+static bool findDebugBinary(const std::string &OrigPath,
+ const std::string &DebuglinkName, uint32_t CRCHash,
+ std::string &Result) {
+ std::string OrigRealPath = OrigPath;
+#if defined(HAVE_REALPATH)
+ if (char *RP = realpath(OrigPath.c_str(), NULL)) {
+ OrigRealPath = RP;
+ free(RP);
+ }
+#endif
+ SmallString<16> OrigDir(OrigRealPath);
+ llvm::sys::path::remove_filename(OrigDir);
+ SmallString<16> DebugPath = OrigDir;
+ // Try /path/to/original_binary/debuglink_name
+ llvm::sys::path::append(DebugPath, DebuglinkName);
+ if (checkFileCRC(DebugPath, CRCHash)) {
+ Result = DebugPath.str();
+ return true;
+ }
+ // Try /path/to/original_binary/.debug/debuglink_name
+ DebugPath = OrigRealPath;
+ llvm::sys::path::append(DebugPath, ".debug", DebuglinkName);
+ if (checkFileCRC(DebugPath, CRCHash)) {
+ Result = DebugPath.str();
+ return true;
+ }
+ // Try /usr/lib/debug/path/to/original_binary/debuglink_name
+ DebugPath = "/usr/lib/debug";
+ llvm::sys::path::append(DebugPath, llvm::sys::path::relative_path(OrigDir),
+ DebuglinkName);
+ if (checkFileCRC(DebugPath, CRCHash)) {
+ Result = DebugPath.str();
+ return true;
+ }
+ return false;
+}
+
+static bool getGNUDebuglinkContents(const Binary *Bin, std::string &DebugName,
+ uint32_t &CRCHash) {
+ const ObjectFile *Obj = dyn_cast<ObjectFile>(Bin);
+ if (!Obj)
+ return false;
+ error_code EC;
+ for (section_iterator I = Obj->begin_sections(), E = Obj->end_sections();
+ I != E; I.increment(EC)) {
+ StringRef Name;
+ I->getName(Name);
+ Name = Name.substr(Name.find_first_not_of("._"));
+ if (Name == "gnu_debuglink") {
+ StringRef Data;
+ I->getContents(Data);
+ DataExtractor DE(Data, Obj->isLittleEndian(), 0);
+ uint32_t Offset = 0;
+ if (const char *DebugNameStr = DE.getCStr(&Offset)) {
+ // 4-byte align the offset.
+ Offset = (Offset + 3) & ~0x3;
+ if (DE.isValidOffsetForDataOfSize(Offset, 4)) {
+ DebugName = DebugNameStr;
+ CRCHash = DE.getU32(&Offset);
+ return true;
+ }
+ }
+ break;
+ }
+ }
+ return false;
+}
+
LLVMSymbolizer::BinaryPair
LLVMSymbolizer::getOrCreateBinary(const std::string &Path) {
BinaryMapTy::iterator I = BinaryForPath.find(Path);
ParsedBinariesAndObjects.push_back(DbgBin);
}
}
+ // Try to locate the debug binary using .gnu_debuglink section.
+ if (DbgBin == 0) {
+ std::string DebuglinkName;
+ uint32_t CRCHash;
+ std::string DebugBinaryPath;
+ if (getGNUDebuglinkContents(Bin, DebuglinkName, CRCHash) &&
+ findDebugBinary(Path, DebuglinkName, CRCHash, DebugBinaryPath) &&
+ !error(createBinary(DebugBinaryPath, ParsedDbgBinary))) {
+ DbgBin = ParsedDbgBinary.take();
+ ParsedBinariesAndObjects.push_back(DbgBin);
+ }
+ }
}
if (DbgBin == 0)
DbgBin = Bin;
return I->second;
std::string BinaryName = ModuleName;
std::string ArchName = Opts.DefaultArch;
- size_t ColonPos = ModuleName.find(':');
+ size_t ColonPos = ModuleName.find_last_of(':');
+ // Verify that substring after colon form a valid arch name.
if (ColonPos != std::string::npos) {
- BinaryName = ModuleName.substr(0, ColonPos);
- ArchName = ModuleName.substr(ColonPos + 1);
+ std::string ArchStr = ModuleName.substr(ColonPos + 1);
+ if (Triple(ArchStr).getArch() != Triple::UnknownArch) {
+ BinaryName = ModuleName.substr(0, ColonPos);
+ ArchName = ArchStr;
+ }
}
BinaryPair Binaries = getOrCreateBinary(BinaryName);
ObjectFile *Obj = getObjectFileFromBinary(Binaries.first, ArchName);