Add new *_atomic counter update function

	PR gcov-profile/58306
	* Makefile.in: New functions (modules) are added.
	* libgcov-profiler.c (__gcov_interval_profiler_atomic): New
	function.
	(__gcov_pow2_profiler_atomic): New function.
	(__gcov_one_value_profiler_body): New argument is instroduced.
	(__gcov_one_value_profiler): Call with the new argument.
	(__gcov_one_value_profiler_atomic): Likewise.
	(__gcov_indirect_call_profiler_v2): Likewise.
	(__gcov_time_profiler_atomic): New function.
	(__gcov_average_profiler_atomic): Likewise.
	(__gcov_ior_profiler_atomic): Likewise.
	* libgcov.h: Declare the aforementioned functions.
	PR gcov-profile/58306
	* gcc.dg/tree-prof/val-profiler-threads-1.c: New test.
	PR gcov-profile/58306
	* tree-profile.c (gimple_init_edge_profiler): Create conditionally
	atomic variants of profile update functions.

From-SVN: r239324

1 files changed, 41 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/tree-prof/val-profiler-threads-1.c b/gcc/testsuite/gcc.dg/tree-prof/val-profiler-threads-1.c
new file mode 100644
index 0000000..e9b04a0
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/tree-prof/val-profiler-threads-1.c
@@ -0,0 +1,41 @@
+/* { dg-options "-O0 -pthread -fprofile-update=atomic" } */
+#include <pthread.h>
+
+#define NUM_THREADS	8
+#define SIZE 1024
+#define ITERATIONS (1000 * 1000)
+
+char buffer[SIZE];
+char buffer2[SIZE];
+
+void *copy_memory(char *dst, char *src, unsigned size)
+{
+   for (unsigned i = 0; i < ITERATIONS; i++)
+   {
+     dst[size % 10] = src[size % 20];
+   }
+}
+
+void *foo(void *d)
+{
+  copy_memory (buffer, buffer2, SIZE);
+}
+
+int main(int argc, char *argv[])
+{
+   pthread_t threads[NUM_THREADS];
+   int rc;
+   long t;
+   for(t=0;t<NUM_THREADS;t++){
+     rc = pthread_create(&threads[t], NULL, foo, 0);
+     if (rc){
+	 return 1;
+       }
+     }
+
+   int retval;
+   for(t=0;t<NUM_THREADS;t++)
+     pthread_join (threads[t], (void**)&retval);
+
+   return buffer[10];
+}