X-Git-Url: http://git.tdb.fi/?p=libs%2Fcore.git;a=blobdiff_plain;f=source%2Fdebug%2Fexceptiontrace.cpp;fp=source%2Fdebug%2Fexceptiontrace.cpp;h=30df4b6f353718c687774878c04e0f4252b4e9b6;hp=0000000000000000000000000000000000000000;hb=c7b4b9d6e07b3e32e5b03f41f0640a8273eed848;hpb=d2795b92b02253a36cb7406fbaeabdef6d7caa19

diff --git a/source/debug/exceptiontrace.cpp b/source/debug/exceptiontrace.cpp
new file mode 100644
index 0000000..30df4b6
--- /dev/null
+++ b/source/debug/exceptiontrace.cpp
@@ -0,0 +1,71 @@
+#include <string>
+#if !defined(_WIN32) && defined(__GLIBC__)
+#include <dlfcn.h>
+#endif
+#include "backtrace.h"
+#include "exceptiontrace.h"
+
+using namespace std;
+
+namespace {
+
+#if defined(WITH_EXCEPTION_TRACE) && !defined(_WIN32) && defined(__GLIBC__)
+typedef void CxaThrowType(void *, type_info *, void (*)(void *));
+CxaThrowType *orig_cxa_throw;
+
+struct HookThrow
+{
+	HookThrow();
+};
+
+HookThrow::HookThrow()
+{
+	void *handle = dlopen(0, RTLD_LAZY);
+	orig_cxa_throw = reinterpret_cast<CxaThrowType *>(dlvsym(handle, "__cxa_throw", "CXXABI_1.3"));
+	dlclose(handle);
+}
+
+HookThrow hook;
+#endif
+
+bool trace_enabled = false;
+
+Msp::Debug::Backtrace &get_thread_backtrace()
+{
+#if __cplusplus>=201103L
+	static thread_local Msp::Debug::Backtrace backtrace;
+#elif defined(__GNUC__)
+	static __thread Msp::Debug::Backtrace backtrace;
+#else
+	static Msp::Debug::Backtrace backtrace;
+#endif
+	return backtrace;
+}
+
+}
+
+namespace Msp {
+namespace Debug {
+
+void enable_exception_trace(bool e)
+{
+	trace_enabled = e;
+}
+
+const Backtrace &get_exception_trace()
+{
+	return get_thread_backtrace();
+}
+
+} // namespace Debug
+} // namespace Msp
+
+#if defined(WITH_EXCEPTION_TRACE) && !defined(_WIN32) && defined(__GLIBC__)
+extern "C" void __cxa_throw(void *exc, std::type_info *type, void (*dest) (void *))
+{
+	if(trace_enabled)
+		get_thread_backtrace() = Msp::Debug::Backtrace::create();
+	orig_cxa_throw(exc, type, dest);
+	std::terminate();
+}
+#endif