From a9a3028935e5b4fbcb9b25fc9fe4069fd3e46b09 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Tue, 28 Oct 2003 18:56:51 +0000 Subject: Initial checkin of function and block profiling runtime library git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9546 91177308-0d34-0410-b5e6-96231b3b80d8 --- runtime/libprofile/BlockProfiling.c | 43 +++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 runtime/libprofile/BlockProfiling.c (limited to 'runtime/libprofile/BlockProfiling.c') diff --git a/runtime/libprofile/BlockProfiling.c b/runtime/libprofile/BlockProfiling.c new file mode 100644 index 0000000000..01b80a88e0 --- /dev/null +++ b/runtime/libprofile/BlockProfiling.c @@ -0,0 +1,43 @@ +/*===-- BlockProfiling.c - Support library for block 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 block profiling +|* instrumentation pass. This should be used with the -insert-block-profiling +|* LLVM pass. +|* +\*===----------------------------------------------------------------------===*/ + +#include "Profiling.h" +#include + +static unsigned *ArrayStart; +static unsigned NumElements; + +/* BlockProfAtExitHandler - When the program exits, just write out the profiling + * data. + */ +static void BlockProfAtExitHandler() { + /* 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 block profiles. Since we directly count each block, + */ + write_profiling_data(Block, ArrayStart, NumElements); +} + + +/* llvm_start_block_profiling - This is the main entry point of the block + * profiling library. It is responsible for setting up the atexit handler. + */ +void llvm_start_block_profiling(int argc, const char **argv, + unsigned *arrayStart, unsigned numElements) { + save_arguments(argc, argv); + ArrayStart = arrayStart; + NumElements = numElements; + atexit(BlockProfAtExitHandler); +} -- cgit v1.2.3-18-g5258