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https://github.com/c64scene-ar/llvm-6502.git
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d09bef4d46
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9564 91177308-0d34-0410-b5e6-96231b3b80d8
89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
/*===-- CommonProfiling.c - Profiling support library support -------------===*\
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|*
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|* The LLVM Compiler Infrastructure
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|*
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|* This file was developed by the LLVM research group and is distributed under
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|* the University of Illinois Open Source License. See LICENSE.TXT for details.
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|*
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|*===----------------------------------------------------------------------===*|
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|*
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|* This file implements functions used by the various different types of
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|* profiling implementations.
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|*
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\*===----------------------------------------------------------------------===*/
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#include "Profiling.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <stdlib.h>
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static char *SavedArgs = 0;
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static unsigned SavedArgsLength = 0;
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/* save_arguments - Save argc and argv as passed into the program for the file
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* we output.
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*/
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void save_arguments(int argc, const char **argv) {
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unsigned Length, i;
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if (SavedArgs || !argv) return; /* This can be called multiple times */
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for (Length = 0, i = 0; i != (unsigned)argc; ++i)
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Length += strlen(argv[i])+1;
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SavedArgs = (char*)malloc(Length);
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for (Length = 0, i = 0; i != (unsigned)argc; ++i) {
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unsigned Len = strlen(argv[i]);
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memcpy(SavedArgs+Length, argv[i], Len);
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Length += Len;
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SavedArgs[Length++] = ' ';
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}
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SavedArgsLength = Length;
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}
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/* write_profiling_data - Write a raw block of profiling counters out to the
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* llvmprof.out file. Note that we allow programs to be instrumented with
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* multiple different kinds of instrumentation. For this reason, this function
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* may be called more than once.
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*/
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void write_profiling_data(enum ProfilingType PT, unsigned *Start,
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unsigned NumElements) {
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static int OutFile = -1;
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int PTy;
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/* If this is the first time this function is called, open the output file for
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* appending, creating it if it does not already exist.
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*/
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if (OutFile == -1) {
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off_t Offset;
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OutFile = open("llvmprof.out", O_CREAT | O_WRONLY | O_APPEND, 0666);
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if (OutFile == -1) {
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perror("LLVM profiling: while opening 'llvmprof.out'");
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return;
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}
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/* Output the command line arguments to the file. */
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{
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int PTy = Arguments;
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int Zeros = 0;
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write(OutFile, &PTy, sizeof(int));
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write(OutFile, &SavedArgsLength, sizeof(unsigned));
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write(OutFile, SavedArgs, SavedArgsLength);
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/* Pad out to a multiple of four bytes */
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if (SavedArgsLength & 3)
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write(OutFile, &Zeros, 4-(SavedArgsLength&3));
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}
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}
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/* Write out this record! */
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PTy = PT;
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write(OutFile, &PTy, sizeof(int));
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write(OutFile, &NumElements, sizeof(unsigned));
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write(OutFile, Start, NumElements*sizeof(unsigned));
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}
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