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// Copyright 2011 Google Inc. All Rights Reserved.
#include "runtime.h"
#include <cxxabi.h>
#include <execinfo.h>
#include "logging.h"
#include "stringprintf.h"
namespace art {
std::string Demangle(const std::string& mangled_name) {
if (mangled_name.empty()) {
return "??";
}
// http://gcc.gnu.org/onlinedocs/libstdc++/manual/ext_demangling.html
int status;
char* name(abi::__cxa_demangle(mangled_name.c_str(), NULL, NULL, &status));
if (name != NULL) {
std::string result(name);
free(name);
return result;
}
return mangled_name + "()";
}
void Runtime::PlatformAbort(const char* file, int line) {
// On the host, we don't have debuggerd to dump a stack for us.
// Get the raw stack frames.
size_t MAX_STACK_FRAMES = 64;
void* frames[MAX_STACK_FRAMES];
size_t frame_count = backtrace(frames, MAX_STACK_FRAMES);
// Turn them into something human-readable with symbols.
char** symbols = backtrace_symbols(frames, frame_count);
if (symbols == NULL) {
PLOG(ERROR) << "backtrace_symbols failed";
return;
}
// backtrace_symbols(3) gives us lines like this:
// "/usr/local/google/home/enh/a1/out/host/linux-x86/bin/../lib/libartd.so(_ZN3art7Runtime13PlatformAbortEPKci+0x15b) [0xf76c5af3]"
// "[0xf7b62057]"
// We extract the pieces and demangle, so we can produce output like this:
// libartd.so:-1] #00 art::Runtime::PlatformAbort(char const*, int) +0x15b [0xf770dd51]
for (size_t i = 0; i < frame_count; ++i) {
std::string text(symbols[i]);
std::string filename("??");
std::string function_name;
size_t index = text.find('(');
if (index != std::string::npos) {
filename = text.substr(0, index);
text.erase(0, index + 1);
index = text.find_first_of("+)");
function_name = Demangle(text.substr(0, index));
text.erase(0, index);
index = text.find(')');
text.erase(index, 1);
}
std::string log_line(StringPrintf("\t#%02zd ", i) + function_name + text);
LogMessage(filename.c_str(), -1, ERROR, -1).stream() << log_line;
}
free(symbols);
}
} // namespace art
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