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demangle callstacks in debug builds (unixes only)

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This requires dladdr() and __cxa_demangle().
This commit is contained in:
Mathias Agopian
2021-03-12 14:20:18 -08:00
committed by Mathias Agopian
parent cf75b11cba
commit 41634a301e
3 changed files with 38 additions and 7 deletions
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41
libs/utils/src/CallStack.cpp
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@@ -30,6 +30,13 @@
#define HAS_EXECINFO 0
#endif
#if !defined(WIN32) && !defined(__EMSCRIPTEN__)
#include <dlfcn.h>
#define HAS_DLADDR 1
#else
#define HAS_DLADDR 0
#endif
#if !defined(NDEBUG) && !defined(WIN32)
#include <cxxabi.h>
#endif
@@ -101,7 +108,7 @@ bool CallStack::operator<(const CallStack& rhs) const {
// ------------------------------------------------------------------------------------------------
utils::CString CallStack::demangleTypeName(const char* mangled) {
utils::CString CallStack::demangle(const char* mangled) {
#if !defined(NDEBUG) && !defined(WIN32)
size_t len;
int status;
@@ -115,20 +122,40 @@ utils::CString CallStack::demangleTypeName(const char* mangled) {
return CString(mangled);
}
utils::CString CallStack::demangleTypeName(const char* mangled) {
return demangle(mangled);
}
// ------------------------------------------------------------------------------------------------
io::ostream& operator<<(io::ostream& stream, const CallStack& callstack) {
#if HAS_EXECINFO
size_t size = callstack.getFrameCount();
char buf[1024];
for (size_t i = 0; i < size; i++) {
intptr_t pc = callstack[i];
std::unique_ptr<char*, FreeDeleter> symbols(::backtrace_symbols((void* const*)&pc, 1));
char const* const symbol = symbols.get()[0];
stream << "#" << i << " " << symbol;
if (i < size - 1) {
stream << io::endl;
Dl_info info;
void* pc = (void*)callstack[i];
#if HAS_DLADDR
if (::dladdr(pc, &info)) {
char const* exe = strrchr(info.dli_fname, '/');
snprintf(buf, sizeof(buf), "#%u\t%-31s %*p %s + %zd\n",
unsigned(i),
exe ? exe + 1 : info.dli_fname,
int(2 + sizeof(void*)*2),
pc,
CallStack::demangle(info.dli_sname).c_str(),
(char *)callstack[i] - (char *)info.dli_saddr);
stream << buf;
} else
#endif
{
char** symbols = ::backtrace_symbols(&pc, 1);
stream << "#" << i << "\t" << symbols[0] << "\n";
free(symbols);
}
}
stream << io::endl;
#endif
return stream;
}