From 127cab2cc7e9b6f474d4768b173af630d8b81840 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Mon, 8 Mar 2004 18:04:31 +0000 Subject: Add edge profiling support to the runtime library git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12227 91177308-0d34-0410-b5e6-96231b3b80d8 --- runtime/libprofile/EdgeProfiling.c | 45 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 runtime/libprofile/EdgeProfiling.c (limited to 'runtime/libprofile') diff --git a/runtime/libprofile/EdgeProfiling.c b/runtime/libprofile/EdgeProfiling.c new file mode 100644 index 0000000000..942b63221a --- /dev/null +++ b/runtime/libprofile/EdgeProfiling.c @@ -0,0 +1,45 @@ +/*===-- EdgeProfiling.c - Support library for edge profiling --------------===*\ +|* +|* The LLVM Compiler Infrastructure +|* +|* This file was developed by the LLVM research group and 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 + +static unsigned *ArrayStart; +static unsigned NumElements; + +/* EdgeProfAtExitHandler - When the program exits, just write out the profiling + * data. + */ +static void EdgeProfAtExitHandler() { + /* Note that if this were doing something more intellegent with the + instrumentation, that 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(Edge, 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; +} -- cgit v1.2.3