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llvm-symbolizer: add DATA command that allows to symbolize global variables.

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Example:
>DATA bin/clang 0x26e8e40
<llvm::SparcSubTypeKV
<40799808 416
The last line is address and size of the object.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@172180 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dmitry Vyukov 2013-01-11 07:16:20 +00:00
parent a675c74208
commit fc183ceae3
1 changed files with 88 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

122
tools/llvm-symbolizer/llvm-symbolizer.cpp
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@ -55,6 +55,8 @@ static cl::opt<bool>
Demangle("demangle", cl::init(true),
cl::desc("Demangle function names"));
static const std::string kSymbolizerBadString = "??";
static StringRef ToolInvocationPath;
static bool error(error_code ec) {
@ -96,7 +98,9 @@ class ModuleInfo {
// Override function name from symbol table if necessary.
if (PrintFunctions && UseSymbolTable) {
std::string Function;
if (getFunctionNameFromSymbolTable(ModuleOffset, Function)) {
uint64_t Start, Size;
if (getNameFromSymbolTable(SymbolRef::ST_Function,
ModuleOffset, Function, Start, Size)) {
patchFunctionNameInDILineInfo(Function, LineInfo);
}
}
@ -121,7 +125,9 @@ class ModuleInfo {
DILineInfo LineInfo = InlinedContext.getFrame(i);
if (i == n - 1) {
std::string Function;
if (getFunctionNameFromSymbolTable(ModuleOffset, Function)) {
uint64_t Start, Size;
if (getNameFromSymbolTable(SymbolRef::ST_Function,
ModuleOffset, Function, Start, Size)) {
patchFunctionNameInDILineInfo(Function, LineInfo);
}
}
@ -132,9 +138,18 @@ class ModuleInfo {
return InlinedContext;
}
bool symbolizeData(uint64_t ModuleOffset, std::string &Name,
uint64_t &Start, uint64_t &Size) const {
return getNameFromSymbolTable(SymbolRef::ST_Data,
ModuleOffset, Name, Start, Size);
}
private:
bool getFunctionNameFromSymbolTable(uint64_t Address,
std::string &FunctionName) const {
bool getNameFromSymbolTable(SymbolRef::Type Type,
uint64_t Address,
std::string &Name,
uint64_t &Addr,
uint64_t &Size) const {
assert(Module);
error_code ec;
for (symbol_iterator si = Module->begin_symbols(),
@ -152,10 +167,12 @@ class ModuleInfo {
// FIXME: If a function has alias, there are two entries in symbol table
// with same address size. Make sure we choose the correct one.
if (SymbolAddress <= Address && Address < SymbolAddress + SymbolSize &&
SymbolType == SymbolRef::ST_Function) {
StringRef Name;
if (error(si->getName(Name))) continue;
FunctionName = Name.str();
SymbolType == Type) {
StringRef SymbolName;
if (error(si->getName(SymbolName))) continue;
Name = SymbolName.str();
Addr = SymbolAddress;
Size = SymbolSize;
return true;
}
}
@ -163,6 +180,25 @@ class ModuleInfo {
}
};
#if !defined(_MSC_VER)
// Assume that __cxa_demangle is provided by libcxxabi (except for Windows).
extern "C" char *__cxa_demangle(const char *mangled_name, char *output_buffer,
size_t *length, int *status);
#endif
void DemangleName(std::string &Name) {
#if !defined(_MSC_VER)
if (!Demangle)
return;
int status = 0;
char *DemangledName = __cxa_demangle(Name.c_str(), 0, 0, &status);
if (status != 0)
return;
Name = DemangledName;
free(DemangledName);
#endif
}
typedef std::map<std::string, ModuleInfo*> ModuleMapTy;
typedef ModuleMapTy::iterator ModuleMapIter;
} // namespace
@ -226,32 +262,15 @@ static ModuleInfo *getOrCreateModuleInfo(const std::string &ModuleName) {
return Info;
}
#if !defined(_MSC_VER)
// Assume that __cxa_demangle is provided by libcxxabi (except for Windows).
extern "C" char *__cxa_demangle(const char *mangled_name, char *output_buffer,
size_t *length, int *status);
#endif
static void printDILineInfo(DILineInfo LineInfo) {
// By default, DILineInfo contains "<invalid>" for function/filename it
// cannot fetch. We replace it to "??" to make our output closer to addr2line.
static const std::string kDILineInfoBadString = "<invalid>";
static const std::string kSymbolizerBadString = "??";
if (PrintFunctions) {
std::string FunctionName = LineInfo.getFunctionName();
if (FunctionName == kDILineInfoBadString)
FunctionName = kSymbolizerBadString;
#if !defined(_MSC_VER)
if (Demangle) {
int status = 0;
char *DemangledName = __cxa_demangle(
FunctionName.c_str(), 0, 0, &status);
if (status == 0) {
FunctionName = DemangledName;
free(DemangledName);
}
}
#endif
DemangleName(FunctionName);
outs() << FunctionName << "\n";
}
std::string Filename = LineInfo.getFileName();
@ -263,7 +282,7 @@ static void printDILineInfo(DILineInfo LineInfo) {
"\n";
}
static void symbolize(std::string ModuleName, std::string ModuleOffsetStr) {
static void symbolizeCode(std::string ModuleName, std::string ModuleOffsetStr) {
ModuleInfo *Info = getOrCreateModuleInfo(ModuleName);
uint64_t Offset = 0;
if (Info == 0 ||
@ -286,17 +305,48 @@ static void symbolize(std::string ModuleName, std::string ModuleOffsetStr) {
outs().flush();
}
static bool parseModuleNameAndOffset(std::string &ModuleName,
std::string &ModuleOffsetStr) {
static const int kMaxInputStringLength = 1024;
static const char kDelimiters[] = " \n";
static void symbolizeData(std::string ModuleName, std::string ModuleOffsetStr) {
std::string Name = kSymbolizerBadString;
uint64_t Start = 0;
uint64_t Size = 0;
uint64_t Offset = 0;
if (UseSymbolTable) {
ModuleInfo *Info = getOrCreateModuleInfo(ModuleName);
if (Info && !StringRef(ModuleOffsetStr).getAsInteger(0, Offset)) {
if (Info->symbolizeData(Offset, Name, Start, Size))
DemangleName(Name);
}
}
outs() << Name << "\n" << Start << " " << Size << "\n\n";
outs().flush();
}
static bool parseCommand(bool &IsData,
std::string &ModuleName,
std::string &ModuleOffsetStr) {
const char *kDataCmd = "DATA ";
const char *kCodeCmd = "CODE ";
const int kMaxInputStringLength = 1024;
const char kDelimiters[] = " \n";
char InputString[kMaxInputStringLength];
if (!fgets(InputString, sizeof(InputString), stdin))
return false;
IsData = false;
ModuleName = "";
ModuleOffsetStr = "";
char *pos = InputString;
if (strncmp(pos, kDataCmd, strlen(kDataCmd)) == 0) {
IsData = true;
pos += strlen(kDataCmd);
} else if (strncmp(pos, kCodeCmd, strlen(kCodeCmd)) == 0) {
IsData = false;
pos += strlen(kCodeCmd);
} else {
// If no cmd, assume it's CODE.
IsData = false;
}
// FIXME: Handle case when filename is given in quotes.
if (char *FilePath = strtok(InputString, kDelimiters)) {
if (char *FilePath = strtok(pos, kDelimiters)) {
ModuleName = FilePath;
if (char *OffsetStr = strtok((char*)0, kDelimiters))
ModuleOffsetStr = OffsetStr;
@ -313,10 +363,14 @@ int main(int argc, char **argv) {
cl::ParseCommandLineOptions(argc, argv, "llvm symbolizer for compiler-rt\n");
ToolInvocationPath = argv[0];
bool IsData = false;
std::string ModuleName;
std::string ModuleOffsetStr;
while (parseModuleNameAndOffset(ModuleName, ModuleOffsetStr)) {
symbolize(ModuleName, ModuleOffsetStr);
while (parseCommand(IsData, ModuleName, ModuleOffsetStr)) {
if (IsData)
symbolizeData(ModuleName, ModuleOffsetStr);
else
symbolizeCode(ModuleName, ModuleOffsetStr);
}
return 0;
}