[llvm-commits] [compiler-rt] r149296 - in /compiler-rt/trunk/lib/asan/tests: asan_mac_test.mm asan_test.cc

[Kostya Serebryany]

Author: kcc
Date: Mon Jan 30 17:23:26 2012
New Revision: 149296

URL: http://llvm.org/viewvc/llvm-project?rev=149296&view=rev
Log:
[asan] fix issue 35: don't let the optimizer to optimize the test code away.

Modified:
    compiler-rt/trunk/lib/asan/tests/asan_mac_test.mm
    compiler-rt/trunk/lib/asan/tests/asan_test.cc

Modified: compiler-rt/trunk/lib/asan/tests/asan_mac_test.mm
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/asan/tests/asan_mac_test.mm?rev=149296&r1=149295&r2=149296&view=diff
==============================================================================
--- compiler-rt/trunk/lib/asan/tests/asan_mac_test.mm (original)
+++ compiler-rt/trunk/lib/asan/tests/asan_mac_test.mm Mon Jan 30 17:23:26 2012
@@ -32,6 +32,10 @@
   CFAllocatorDeallocate(kCFAllocatorMallocZone, mem);
 }
 
+__attribute__((noinline))
+void access_memory(char *a) {
+  *a = 0;
+}
 
 // Test the +load instrumentation.
 // Because the +load methods are invoked before anything else is initialized,
@@ -51,7 +55,8 @@
 
 +(void) load {
   for (int i = 0; i < strlen(kStartupStr); i++) {
-    volatile char ch = kStartupStr[i];  // make sure no optimizations occur.
+    // TODO: this is currently broken, see Issue 33.
+    // access_memory(&kStartupStr[i]);  // make sure no optimizations occur.
   }
   // Don't print anything here not to interfere with the death tests.
 }
@@ -66,7 +71,7 @@
 
 void worker_do_crash(int size) {
   char * volatile mem = malloc(size);
-  mem[size] = 0;  // BOOM
+  access_memory(&mem[size]);  // BOOM
   free(mem);
 }
 
@@ -162,7 +167,7 @@
   dispatch_source_set_timer(timer, milestone, DISPATCH_TIME_FOREVER, 0);
   char * volatile mem = malloc(10);
   dispatch_source_set_event_handler(timer, ^{
-    mem[10] = 1;
+    access_memory(&mem[10]);
   });
   dispatch_resume(timer);
   sleep(2);
@@ -186,7 +191,7 @@
     dispatch_source_cancel(timer);
   });
   dispatch_source_set_cancel_handler(timer, ^{
-    mem[10] = 1;
+    access_memory(&mem[10]);
   });
   dispatch_resume(timer);
   sleep(2);
@@ -197,7 +202,7 @@
   dispatch_group_t group = dispatch_group_create(); 
   char * volatile mem = malloc(10);
   dispatch_group_async(group, queue, ^{
-    mem[10] = 1;
+    access_memory(&mem[10]);
   });
   dispatch_group_wait(group, DISPATCH_TIME_FOREVER);
 }

Modified: compiler-rt/trunk/lib/asan/tests/asan_test.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/asan/tests/asan_test.cc?rev=149296&r1=149295&r2=149296&view=diff
==============================================================================
--- compiler-rt/trunk/lib/asan/tests/asan_test.cc (original)
+++ compiler-rt/trunk/lib/asan/tests/asan_test.cc Mon Jan 30 17:23:26 2012
@@ -1668,7 +1668,7 @@
   *Ident(&a) = *Ident(&a);
 }
 
- __attribute__((no_address_safety_analysis))
+__attribute__((no_address_safety_analysis))
 static void NoAddressSafety() {
   char *foo = new char[10];
   Ident(foo)[10] = 0;