void CodeProfile::report()
{
dataLogF("<CodeProfiling %s:%d>\n", m_file.data(), m_lineNumber);
// How many frames of C-code to print - 0, if not verbose, 1 if verbose, up to 1024 if very verbose.
unsigned recursionLimit = CodeProfiling::beVeryVerbose() ? 1024 : CodeProfiling::beVerbose();
ProfileTreeNode profile;
// Walk through the sample buffer.
size_t trace = 0;
while (trace < m_samples.size()) {
// All traces are zero or more 'EngineFrame's, followed by a non-'EngineFrame'.
// Scan to find the last sample in the trace.
size_t lastInTrace = trace;
while (m_samples[lastInTrace].type == EngineFrame)
++lastInTrace;
// We use the last sample type to look up a name (used as a bucket in the profiler).
ProfileTreeNode* callbacks = profile.sampleChild(s_codeTypeNames[m_samples[lastInTrace].type]);
// If there are any samples in C-code, add up to recursionLimit of them into the profile tree.
size_t lastEngineFrame = lastInTrace;
for (unsigned count = 0; lastEngineFrame > trace && count < recursionLimit; ++count) {
--lastEngineFrame;
ASSERT(m_samples[lastEngineFrame].type == EngineFrame);
const char* name = "<unknown>";
auto demangled = StackTrace::demangle(m_samples[lastEngineFrame].pc);
if (demangled)
name = demangled->demangledName() ? demangled->demangledName() : demangled->mangledName();
callbacks = callbacks->sampleChild(name);
if (truncateTrace(name))
break;
}
// Move on to the next trace.
trace = lastInTrace + 1;
ASSERT(trace <= m_samples.size());
}
// Output the profile tree.
dataLogF("Total samples: %lld\n", static_cast<long long>(profile.childCount()));
profile.dump();
for (size_t i = 0 ; i < m_children.size(); ++i)
m_children[i]->report();
dataLogF("</CodeProfiling %s:%d>\n", m_file.data(), m_lineNumber);
}
std::string
Function::printableName() const {
std::string s = "function " + StringUtility::addrToString(address());
const std::string &name = demangledName();
if (!name.empty())
s += " \"" + StringUtility::cEscape(name) + "\"";
return s;
}
void JSGlobalObjectInspectorController::appendAPIBacktrace(ScriptCallStack& callStack)
{
#if OS(DARWIN) || (OS(LINUX) && !PLATFORM(GTK))
static const int framesToShow = 31;
static const int framesToSkip = 3; // WTFGetBacktrace, appendAPIBacktrace, reportAPIException.
void* samples[framesToShow + framesToSkip];
int frames = framesToShow + framesToSkip;
WTFGetBacktrace(samples, &frames);
void** stack = samples + framesToSkip;
int size = frames - framesToSkip;
for (int i = 0; i < size; ++i) {
auto demangled = StackTrace::demangle(stack[i]);
if (demangled)
callStack.append(ScriptCallFrame(demangled->demangledName() ? demangled->demangledName() : demangled->mangledName(), ASCIILiteral("[native code]"), noSourceID, 0, 0));
else
callStack.append(ScriptCallFrame(ASCIILiteral("?"), ASCIILiteral("[native code]"), noSourceID, 0, 0));
}
#else
UNUSED_PARAM(callStack);
#endif
}
/**
* @brief getStackTrace
* 获得栈信息
* @return {string}
*/
string baseException::getStackTrace() const
{
if (_mStackTraceSize == 0) {
return "<No stack trace>\n";
}
char** strings = backtrace_symbols(_mStackTrace, 10);
if (strings == NULL) {
return "Unknown error: backtrace_symbols returned NULL>\n";
}
string result;
for (size_t i = 0; i < _mStackTraceSize; i++) {
string mangledName = strings[i];
string::size_type begin = mangledName.find('(');
string::size_type end = mangledName.find('+', begin);
if (begin == string::npos || end == string::npos) {
result += mangledName;
result += '\n';
continue;
}
++begin;
int status;
//获取函数类型
char* s = abi::__cxa_demangle(mangledName.substr(begin, end-begin).c_str(), NULL, 0, &status);
if (status != 0) {
result += mangledName;
result += '\n';
continue;
}
string demangledName(s);
free(s);
result += mangledName.substr(0, begin);
result += demangledName;
result += mangledName.substr(end);
result += '\n';
}
free(strings);
return result;
}
