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
diff --git a/runtime/libprofile/CommonProfiling.c b/runtime/libprofile/CommonProfiling.c
new file mode 100644
index 0000000..ea795b6
--- /dev/null
+++ b/runtime/libprofile/CommonProfiling.c
@@ -0,0 +1,82 @@
+/*===-- CommonProfiling.c - Profiling support library support -------------===*\
+|*
+|* 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 functions used by the various different types of
+|* profiling implementations.
+|*
+\*===----------------------------------------------------------------------===*/
+
+#include "Profiling.h"
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+static int SavedArgc = 0;
+static const char **SavedArgv = 0;
+
+/* save_arguments - Save argc and argv as passed into the program for the file
+ * we output.
+ */
+void save_arguments(int argc, const char **argv) {
+ if (SavedArgv) return; /* This can be called multiple times */
+
+ /* FIXME: this should copy the arguments out of argv into a string of our own,
+ * because the program might modify the arguments!
+ */
+ SavedArgc = argc;
+ SavedArgv = argv;
+}
+
+
+
+
+/* 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) {
+ 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 (OutFile == -1) {
+ off_t Offset;
+ OutFile = open("llvmprof.out", O_CREAT | O_WRONLY | O_APPEND, 0666);
+ if (OutFile == -1) {
+ perror("LLVM profiling: while opening 'llvmprof.out'");
+ return;
+ }
+
+ /* Output the command line arguments to the file. */
+ {
+ const char *Args = "";
+ int PTy = Arguments;
+ int ArgLength = strlen(Args);
+ int Zeros = 0;
+ write(OutFile, &PTy, sizeof(int));
+ write(OutFile, &ArgLength, sizeof(int));
+ write(OutFile, Args, ArgLength);
+ /* Pad out to a multiple of four bytes */
+ if (ArgLength & 3)
+ write(OutFile, &Zeros, 4-(ArgLength&3));
+ }
+ }
+
+ /* Write out this record! */
+ PTy = PT;
+ write(OutFile, &PTy, sizeof(int));
+ write(OutFile, Start, NumElements*sizeof(unsigned));
+}