[compiler-rt] r195190 - compiler-rt: Support for file checksum in GCDAProfiling.cpp.

[Yuchen Wu]

Author: ywu
Date: Tue Nov 19 22:14:48 2013
New Revision: 195190

URL: http://llvm.org/viewvc/llvm-project?rev=195190&view=rev
Log:
compiler-rt: Support for file checksum in GCDAProfiling.cpp.

Takes file checksum as an argument to write to .gcda file.

Modified:
    compiler-rt/trunk/lib/profile/GCDAProfiling.c

Modified: compiler-rt/trunk/lib/profile/GCDAProfiling.c
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/profile/GCDAProfiling.c?rev=195190&r1=195189&r2=195190&view=diff
==============================================================================
--- compiler-rt/trunk/lib/profile/GCDAProfiling.c (original)
+++ compiler-rt/trunk/lib/profile/GCDAProfiling.c Tue Nov 19 22:14:48 2013
@@ -245,7 +245,8 @@ static void unmap_file() {
  * profiling enabled will emit to a different file. Only one file may be
  * started at a time.
  */
-void llvm_gcda_start_file(const char *orig_filename, const char version[4]) {
+void llvm_gcda_start_file(const char *orig_filename, const char version[4],
+                          uint32_t checksum) {
   const char *mode = "r+b";
   filename = mangle_filename(orig_filename);
 
@@ -293,10 +294,10 @@ void llvm_gcda_start_file(const char *or
     }
   }
 
-  /* gcda file, version, stamp LLVM. */
+  /* gcda file, version, stamp checksum. */
   write_bytes("adcg", 4);
   write_bytes(version, 4);
-  write_bytes("MVLL", 4);
+  write_32bit_value(checksum);
 
 #ifdef DEBUG_GCDAPROFILING
   fprintf(stderr, "llvmgcda: [%s]\n", orig_filename);
@@ -329,7 +330,8 @@ void llvm_gcda_increment_indirect_counte
 }
 
 void llvm_gcda_emit_function(uint32_t ident, const char *function_name,
-                             uint8_t use_extra_checksum) {
+                             uint8_t use_extra_checksum,
+                             uint32_t cfg_checksum) {
   uint32_t len = 2;
 
   if (use_extra_checksum)
@@ -348,7 +350,7 @@ void llvm_gcda_emit_function(uint32_t id
   write_32bit_value(ident);
   write_32bit_value(0);
   if (use_extra_checksum)
-    write_32bit_value(0);
+    write_32bit_value(cfg_checksum);
   if (function_name)
     write_string(function_name);
 }