/3rd_party/llvm/runtime/libprofile/EdgeProfiling.c
https://code.google.com/p/softart/ · C · 45 lines · 15 code · 5 blank · 25 comment · 0 complexity · 8426cd88ff8c7bfe779392f4924f57ba MD5 · raw file
- /*===-- EdgeProfiling.c - Support library for edge profiling --------------===*\
- |*
- |* The LLVM Compiler Infrastructure
- |*
- |* This file is distributed under the University of Illinois Open Source
- |* License. See LICENSE.TXT for details.
- |*
- |*===----------------------------------------------------------------------===*|
- |*
- |* This file implements the call back routines for the edge profiling
- |* instrumentation pass. This should be used with the -insert-edge-profiling
- |* LLVM pass.
- |*
- \*===----------------------------------------------------------------------===*/
-
- #include "Profiling.h"
- #include <stdlib.h>
-
- static unsigned *ArrayStart;
- static unsigned NumElements;
-
- /* EdgeProfAtExitHandler - When the program exits, just write out the profiling
- * data.
- */
- static void EdgeProfAtExitHandler(void) {
- /* Note that if this were doing something more intelligent with the
- * instrumentation, we could do some computation here to expand what we
- * collected into simple edge profiles. Since we directly count each edge, we
- * just write out all of the counters directly.
- */
- write_profiling_data(EdgeInfo, ArrayStart, NumElements);
- }
-
-
- /* llvm_start_edge_profiling - This is the main entry point of the edge
- * profiling library. It is responsible for setting up the atexit handler.
- */
- int llvm_start_edge_profiling(int argc, const char **argv,
- unsigned *arrayStart, unsigned numElements) {
- int Ret = save_arguments(argc, argv);
- ArrayStart = arrayStart;
- NumElements = numElements;
- atexit(EdgeProfAtExitHandler);
- return Ret;
- }