44 lines
1.2 KiB
C
44 lines
1.2 KiB
C
// 10 may 2015
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#include "uipriv_windows.h"
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static FILE *fprof = NULL;
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static DWORD WINAPI profilerThread(LPVOID th)
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{
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HANDLE thread = (HANDLE) th;
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LARGE_INTEGER counter;
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CONTEXT ctxt;
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// TODO check for errors
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if (SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL) == 0)
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complain("error setting thread priority in profilerThread()");
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for (;;) {
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if (SuspendThread(thread) == (DWORD) (-1))
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complain("error suspending thread in profilerThread()");
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QueryPerformanceCounter(&counter);
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ZeroMemory(&ctxt, sizeof (CONTEXT));
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ctxt.ContextFlags = CONTEXT_CONTROL;
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if (GetThreadContext(thread, &ctxt) == 0)
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complain("error getting thread context in profilerThread()");
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fprintf(fprof, "%I64X %I64d\n",
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(DWORD64) (ctxt.Eip),
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counter.QuadPart);
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fflush(fprof);
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if (ResumeThread(thread) == (DWORD) (-1))
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complain("error resuming thread in profilerThread()");
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Sleep(100);
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}
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return 0;
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}
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void initprofiler(HANDLE thread)
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{
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fprof = fopen("profiler.out", "w");
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if (fprof == NULL) {
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fprintf(stderr, "error opening profiler output file\n");
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abort();
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}
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if (CreateThread(NULL, 0, profilerThread, thread, 0, NULL) == NULL)
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complain("error creating profiler thread");
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}
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