|*
|* 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 is distributed under the University of Illinois Open Source
+|* License. See LICENSE.TXT for details.
+|*
|*===----------------------------------------------------------------------===*|
-|*
+|*
|* This file implements functions used by the various different types of
|* profiling implementations.
|*
\*===----------------------------------------------------------------------===*/
#include "Profiling.h"
+#include <assert.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <string.h>
+#if !defined(_MSC_VER) && !defined(__MINGW32__)
#include <unistd.h>
+#else
+#include <io.h>
+#endif
#include <stdlib.h>
static char *SavedArgs = 0;
* what to do with it.
*/
const char *Arg = argv[1];
- memmove(&argv[1], &argv[2], (argc-1)*sizeof(char*));
+ memmove((char**)&argv[1], &argv[2], (argc-1)*sizeof(char*));
--argc;
if (!strcmp(Arg, "-llvmprof-output")) {
puts("-llvmprof-output requires a filename argument!");
else {
OutputFilename = strdup(argv[1]);
- memmove(&argv[1], &argv[2], (argc-1)*sizeof(char*));
+ memmove((char**)&argv[1], &argv[2], (argc-1)*sizeof(char*));
--argc;
}
} else {
for (Length = 0, i = 0; i != (unsigned)argc; ++i)
Length += strlen(argv[i])+1;
+ /* Defensively check for a zero length, even though this is unlikely
+ * to happen in practice. This avoids calling malloc() below with a
+ * size of 0.
+ */
+ if (Length == 0) {
+ SavedArgs = 0;
+ SavedArgsLength = 0;
+ return argc;
+ }
+
SavedArgs = (char*)malloc(Length);
for (Length = 0, i = 0; i != (unsigned)argc; ++i) {
unsigned Len = strlen(argv[i]);
}
-/* write_profiling_data - Write a raw block of profiling counters out to the
- * llvmprof.out file. Note that we allow programs to be instrumented with
- * multiple different kinds of instrumentation. For this reason, this function
- * may be called more than once.
+/*
+ * Retrieves the file descriptor for the profile file.
*/
-void write_profiling_data(enum ProfilingType PT, unsigned *Start,
- unsigned NumElements) {
+int getOutFile() {
static int OutFile = -1;
- int PTy;
-
- /* If this is the first time this function is called, open the output file for
- * appending, creating it if it does not already exist.
+
+ /* If this is the first time this function is called, open the output file
+ * for appending, creating it if it does not already exist.
*/
if (OutFile == -1) {
- OutFile = open(OutputFilename, O_CREAT | O_WRONLY | O_APPEND, 0666);
+ OutFile = open(OutputFilename, O_CREAT | O_WRONLY, 0666);
+ lseek(OutFile, 0, SEEK_END); /* O_APPEND prevents seeking */
if (OutFile == -1) {
fprintf(stderr, "LLVM profiling runtime: while opening '%s': ",
OutputFilename);
perror("");
- return;
+ return(OutFile);
}
/* Output the command line arguments to the file. */
{
int PTy = ArgumentInfo;
int Zeros = 0;
- write(OutFile, &PTy, sizeof(int));
- write(OutFile, &SavedArgsLength, sizeof(unsigned));
- write(OutFile, SavedArgs, SavedArgsLength);
+ if (write(OutFile, &PTy, sizeof(int)) < 0 ||
+ write(OutFile, &SavedArgsLength, sizeof(unsigned)) < 0 ||
+ write(OutFile, SavedArgs, SavedArgsLength) < 0 ) {
+ fprintf(stderr,"error: unable to write to output file.");
+ exit(0);
+ }
/* Pad out to a multiple of four bytes */
- if (SavedArgsLength & 3)
- write(OutFile, &Zeros, 4-(SavedArgsLength&3));
+ if (SavedArgsLength & 3) {
+ if (write(OutFile, &Zeros, 4-(SavedArgsLength&3)) < 0) {
+ fprintf(stderr,"error: unable to write to output file.");
+ exit(0);
+ }
+ }
}
}
-
+ return(OutFile);
+}
+
+/* write_profiling_data - Write a raw block of profiling counters out to the
+ * llvmprof.out file. Note that we allow programs to be instrumented with
+ * multiple different kinds of instrumentation. For this reason, this function
+ * may be called more than once.
+ */
+void write_profiling_data(enum ProfilingType PT, unsigned *Start,
+ unsigned NumElements) {
+ int PTy;
+ int outFile = getOutFile();
+
/* Write out this record! */
PTy = PT;
- write(OutFile, &PTy, sizeof(int));
- write(OutFile, &NumElements, sizeof(unsigned));
- write(OutFile, Start, NumElements*sizeof(unsigned));
+ if( write(outFile, &PTy, sizeof(int)) < 0 ||
+ write(outFile, &NumElements, sizeof(unsigned)) < 0 ||
+ write(outFile, Start, NumElements*sizeof(unsigned)) < 0 ) {
+ fprintf(stderr,"error: unable to write to output file.");
+ exit(0);
+ }
}