// Capture "golden" stack trace with default-configured Symbolizer
void ElfCacheTest::SetUp() {
bar();
Symbolizer symbolizer;
symbolizer.symbolize(goldenFrames);
// At least 3 stack frames from us + getStackTrace()
ASSERT_LE(4, goldenFrames.frameCount);
}
std::ostream& operator<<(std::ostream& out, const ExceptionInfo& info) {
out << "Exception type: ";
if (info.type) {
out << folly::demangle(*info.type);
} else {
out << "(unknown type)";
}
out << " (" << info.frames.size()
<< (info.frames.size() == 1 ? " frame" : " frames")
<< ")\n";
try {
ssize_t frameCount = info.frames.size();
// Skip our own internal frames
static constexpr size_t skip = 3;
if (frameCount > skip) {
auto addresses = info.frames.data() + skip;
frameCount -= skip;
std::vector<SymbolizedFrame> frames;
frames.resize(frameCount);
Symbolizer symbolizer;
symbolizer.symbolize(addresses, frames.data(), frameCount);
OStreamSymbolizePrinter osp(out);
osp.println(addresses, frames.data(), frameCount);
}
} catch (const std::exception& e) {
out << "\n !! caught " << folly::exceptionStr(e) << "\n";
} catch (...) {
out << "\n !!! caught unexpected exception\n";
}
return out;
}
std::ostream& operator<<(std::ostream& out, const ExceptionInfo& info) {
out << "Exception type: ";
if (info.type) {
out << folly::demangle(*info.type);
} else {
out << "(unknown type)";
}
out << " (" << info.frames.size()
<< (info.frames.size() == 1 ? " frame" : " frames")
<< ")\n";
try {
Symbolizer symbolizer;
folly::StringPiece symbolName;
Dwarf::LocationInfo location;
for (auto ip : info.frames) {
// Symbolize the previous address because the IP might be in the
// next function, per glog/src/signalhandler.cc
symbolizer.symbolize(ip-1, symbolName, location);
Symbolizer::write(out, ip, symbolName, location);
}
} catch (const std::exception& e) {
out << "\n !! caught " << folly::exceptionStr(e) << "\n";
} catch (...) {
out << "\n !!! caught unexpected exception\n";
}
return out;
}
int main(int argc, char *argv[]) {
google::InitGoogleLogging(argv[0]);
Symbolizer s;
StringPiece name;
Dwarf::LocationInfo location;
CHECK(s.symbolize(reinterpret_cast<uintptr_t>(main), name, location));
LOG(INFO) << name << " " << location.file << " " << location.line << " ("
<< location.mainFile << ")";
return 0;
}
TEST(Symbolizer, Single) {
Symbolizer symbolizer;
SymbolizedFrame a;
ASSERT_TRUE(symbolizer.symbolize(reinterpret_cast<uintptr_t>(foo), a));
EXPECT_EQ("folly::symbolizer::test::foo()", a.demangledName());
auto path = a.location.file.toString();
folly::StringPiece basename(path);
auto pos = basename.rfind('/');
if (pos != folly::StringPiece::npos) {
basename.advance(pos + 1);
}
EXPECT_EQ("SymbolizerTest.cpp", basename.str());
}
void runElfCacheTest(Symbolizer& symbolizer) {
FrameArray<100> frames = goldenFrames;
for (size_t i = 0; i < frames.frameCount; ++i) {
frames.frames[i].clear();
}
symbolizer.symbolize(frames);
ASSERT_LE(4, frames.frameCount);
for (size_t i = 1; i < 4; ++i) {
EXPECT_STREQ(goldenFrames.frames[i].name, frames.frames[i].name);
}
}
void MemoryManager::refreshStatsHelperExceeded() {
#ifdef FACEBOOK
if (RuntimeOption::LogNativeStackOnOOM) {
using namespace folly::symbolizer;
constexpr size_t kMaxFrames = 128;
uintptr_t addresses[kMaxFrames];
auto nframes = getStackTrace(addresses, kMaxFrames);
std::vector<SymbolizedFrame> frames(nframes);
Symbolizer symbolizer;
symbolizer.symbolize(addresses, frames.data(), nframes);
StringSymbolizePrinter printer;
printer.println(addresses, frames.data(), nframes);
Logger::Error("Exceeded memory limit\n\nC++ stack:\n%s",
printer.str().c_str());
}
#endif
ThreadInfo* info = ThreadInfo::s_threadInfo.getNoCheck();
info->m_reqInjectionData.setMemExceededFlag();
m_couldOOM = false;
}
TEST(Symbolizer, Single) {
Symbolizer symbolizer;
SymbolizedFrame a;
ASSERT_TRUE(symbolizer.symbolize(reinterpret_cast<uintptr_t>(foo), a));
EXPECT_EQ("folly::symbolizer::test::foo()", a.demangledName());
// The version of clang we use doesn't generate a `.debug_aranges` section,
// which the symbolizer needs to lookup the filename.
constexpr bool built_with_clang =
#ifdef __clang__
true;
#else
false;
#endif
if (!built_with_clang) {
auto path = a.location.file.toString();
folly::StringPiece basename(path);
auto pos = basename.rfind('/');
if (pos != folly::StringPiece::npos) {
basename.advance(pos + 1);
}
EXPECT_EQ("SymbolizerTest.cpp", basename.str());
}
}
