UNLOZE/sm-ext-accelerator-2023
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Install termination handler to collect additional information for C++ exceptions

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This commit is contained in:
Asher Baker 2019-07-20 00:51:47 +00:00
parent 853ba22b0d
commit 8e42daada7
2 changed files with 36 additions and 14 deletions
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1
AMBuildScript
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@ -88,7 +88,6 @@ class SM:
self.compiler.AddToListVar('POSTLINKFLAGS', '-m32')
self.compiler.AddToListVar('POSTLINKFLAGS', '-Wl,-z,defs')
self.compiler.AddToListVar('CXXFLAGS', '-std=c++11')
self.compiler.AddToListVar('CXXFLAGS', '-fno-exceptions')
self.compiler.AddToListVar('CXXFLAGS', '-fno-threadsafe-statics')
self.compiler.AddToListVar('CXXFLAGS', '-Wno-non-virtual-dtor')
self.compiler.AddToListVar('CXXFLAGS', '-Wno-overloaded-virtual')

49
extension/extension.cpp
View File

@ -56,23 +56,23 @@ public:
// Taken from https://hg.mozilla.org/mozilla-central/file/3eb7623b5e63b37823d5e9c562d56e586604c823/build/unix/stdc%2B%2Bcompat/stdc%2B%2Bcompat.cpp
extern "C" void __attribute__((weak)) __cxa_throw_bad_array_new_length() {
abort();
abort();
}
namespace std {
/* We shouldn't be throwing exceptions at all, but it sadly turns out
we call STL (inline) functions that do. */
void __attribute__((weak)) __throw_out_of_range_fmt(char const* fmt, ...) {
va_list ap;
char buf[1024]; // That should be big enough.
/* We shouldn't be throwing exceptions at all, but it sadly turns out
we call STL (inline) functions that do. */
void __attribute__((weak)) __throw_out_of_range_fmt(char const* fmt, ...) {
va_list ap;
char buf[1024]; // That should be big enough.
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
buf[sizeof(buf) - 1] = 0;
va_end(ap);
va_start(ap, fmt);
vsnprintf(buf, sizeof(buf), fmt, ap);
buf[sizeof(buf) - 1] = 0;
va_end(ap);
__throw_range_error(buf);
}
__throw_range_error(buf);
}
} // namespace std
// Updated versions of the SM ones for C++14
@ -146,6 +146,27 @@ PluginInfo plugins[256];
#endif
#if defined _LINUX
void terminateHandler()
{
const char *msg = "missing exception";
std::exception_ptr pEx = std::current_exception();
if (pEx) {
try {
std::rethrow_exception(pEx);
} catch(const std::exception &e) {
msg = strdup(e.what());
} catch(...) {
msg = "unknown exception";
}
}
size_t msgLength = strlen(msg) + 2;
volatile char * volatile msgForCrashDumps = (char *)alloca(msgLength);
strcpy((char *)msgForCrashDumps + 1, msg);
abort();
}
void (*SignalHandler)(int, siginfo_t *, void *);
const int kExceptionSignals[] = {
@ -253,6 +274,8 @@ static bool dumpCallback(const google_breakpad::MinidumpDescriptor& descriptor,
void OnGameFrame(bool simulating)
{
std::set_terminate(terminateHandler);
bool weHaveBeenFuckedOver = false;
struct sigaction oact;
@ -609,7 +632,7 @@ class UploadThread: public IThread
if (presubmitToken && presubmitToken[0]) {
form->AddString("PresubmitToken", presubmitToken);
}
form->AddString("symbol_file", output.c_str());
MemoryDownloader data;