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Revert "Attempted to improve the profiler a bit, making it more like a real profiler. It doesn't quite work yet." 

It won't work. We spend most of our time in GetMessage(). Thanks to various people on Stack Overflow.

This reverts commit a342998263.
This commit is contained in:
Pietro Gagliardi 2015-05-11 11:46:34 -04:00
parent 3292cf63f9
commit d13c0f3cbd
3 changed files with 25 additions and 42 deletions
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3
windows/GNUmakeinc.mk
View File

@ -47,5 +47,6 @@ endif
ifeq ($(PROFILE),1)
osCFILES += windows/profiler.c
osCFLAGS += -DLIBUIPROFILING
osCFLAGS += -finstrument-functions
osLDFLAGS += -finstrument-functions
endif

10
windows/init.c
View File

@ -80,16 +80,6 @@ const char *uiInit(uiInitOptions *o)
HCURSOR hDefaultCursor;
NONCLIENTMETRICSW ncm;
#ifdef LIBUIPROFILING
extern void initprofiler(HANDLE);
HANDLE real;
if (DuplicateHandle(GetCurrentProcess(), GetCurrentThread(),
GetCurrentProcess(), &real,
0, FALSE, DUPLICATE_SAME_ACCESS) == 0)
return loadLastError("getting the current thread's handle for initializing the profiler");
initprofiler(real);
#endif
options = *o;
if (initAlloc() == 0)

54
windows/profiler.c
View File

@ -3,41 +3,33 @@
static FILE *fprof = NULL;
static DWORD WINAPI profilerThread(LPVOID th)
{
HANDLE thread = (HANDLE) th;
LARGE_INTEGER counter;
CONTEXT ctxt;
// TODO check for errors
if (SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL) == 0)
complain("error setting thread priority in profilerThread()");
for (;;) {
if (SuspendThread(thread) == (DWORD) (-1))
complain("error suspending thread in profilerThread()");
QueryPerformanceCounter(&counter);
ZeroMemory(&ctxt, sizeof (CONTEXT));
ctxt.ContextFlags = CONTEXT_CONTROL;
if (GetThreadContext(thread, &ctxt) == 0)
complain("error getting thread context in profilerThread()");
fprintf(fprof, "%I64X %I64d\n",
(DWORD64) (ctxt.Eip),
counter.QuadPart);
fflush(fprof);
if (ResumeThread(thread) == (DWORD) (-1))
complain("error resuming thread in profilerThread()");
Sleep(100);
}
return 0;
}
void initprofiler(HANDLE thread)
__attribute__((no_instrument_function)) static void init(void)
{
if (fprof != NULL)
return;
fprof = fopen("profiler.out", "w");
if (fprof == NULL) {
fprintf(stderr, "error opening profiler output file\n");
abort();
}
if (CreateThread(NULL, 0, profilerThread, thread, 0, NULL) == NULL)
complain("error creating profiler thread");
}
__attribute__((no_instrument_function)) void __cyg_profile_func_enter(void *this_fn, void *call_site)
{
LARGE_INTEGER counter;
init();
QueryPerformanceCounter(&counter);
fprintf(fprof, "enter %p %I64d\n", this_fn, counter.QuadPart);
fflush(fprof);
}
__attribute__((no_instrument_function)) void __cyg_profile_func_exit(void *this_fn, void *call_site)
{
LARGE_INTEGER counter;
init();
QueryPerformanceCounter(&counter);
fprintf(fprof, "leave %p %I64d\n", this_fn, counter.QuadPart);
fflush(fprof);
}