[profile] Add interface to get profile filename

Summary:
Add __llvm_profile_get_filename interface to get the profile filename,
which can be used for identifying which profile file belongs to an app
when multiple binaries are instrumented and dumping profiles into the
same directory. The filename includes the path.

Reviewers: davidxl

Subscribers: delcypher, #sanitizers, llvm-commits

Differential Revision: https://reviews.llvm.org/D49529

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@337482 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 39 insertions, 0 deletions

diff --git a/test/profile/instrprof-get-filename.c b/test/profile/instrprof-get-filename.c
new file mode 100644
index 000000000..031b75f12
--- /dev/null
+++ b/test/profile/instrprof-get-filename.c
@@ -0,0 +1,39 @@
+// Test __llvm_profile_get_filename.
+// RUN: %clang_pgogen -O2 -o %t %s
+// RUN: %run %t
+
+#include <stdio.h>
+#include <string.h>
+
+const char *__llvm_profile_get_filename();
+void __llvm_profile_set_filename(const char *);
+
+int main(int argc, const char *argv[]) {
+  int i;
+  const char *filename;
+  const char *new_filename = "/path/to/test.profraw";
+
+  filename = __llvm_profile_get_filename();
+  if (strncmp(filename, "default_", 8)) {
+    fprintf(stderr,
+            "Error: got filename %s, expected it to start with 'default_'\n",
+            filename);
+    return 1;
+  }
+  if (strcmp(filename + strlen(filename) - strlen(".profraw"), ".profraw")) {
+    fprintf(stderr,
+            "Error: got filename %s, expected it to end with '.profraw'\n",
+            filename);
+    return 1;
+  }
+
+  __llvm_profile_set_filename(new_filename);
+  filename = __llvm_profile_get_filename();
+  if (strcmp(filename, new_filename)) {
+    fprintf(stderr, "Error: got filename %s, expected '%s'\n", filename,
+            new_filename);
+    return 1;
+  }
+
+  return 0;
+}