[LSan] Fix tests with some libstdc++ implementations.

Summary:
Newer libstdc++ has global pool, which is filled with objects
allocated during libstdc++ initialization, and never released.
Using use_globals=0 in the lit tests results in these objects
being treated as leaks.

Fix this by porting several tests to plain C, and introducing
a simple sanity test case for __lsan::ScopedDisabler.

Reviewers: kcc, ygribov

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D14798

llvm-svn: 253576

compiler-rt/test/lsan/TestCases/cleanup_in_tsd_destructor.c

@@ -4,7 +4,7 @@
 // additional cleanup tasks). LSan doesn't actually meet that goal 100%, but it
 // makes its best effort.
 // RUN: LSAN_BASE="report_objects=1:use_registers=0:use_stacks=0:use_globals=0"
-// RUN: %clangxx_lsan %s -o %t
+// RUN: %clang_lsan %s -o %t
 // RUN: LSAN_OPTIONS=$LSAN_BASE:use_tls=1 %run %t
 // RUN: LSAN_OPTIONS=$LSAN_BASE:use_tls=0 not %run %t 2>&1 | FileCheck %s
 

compiler-rt/test/lsan/TestCases/disabler.c

@@ -0,0 +1,24 @@
+// Test for __lsan_disable() / __lsan_enable().
+// RUN: LSAN_BASE="report_objects=1:use_registers=0:use_stacks=0:use_globals=0:use_tls=0"
+// RUN: %clang_lsan %s -o %t
+// RUN: LSAN_OPTIONS=$LSAN_BASE not %run %t 2>&1 | FileCheck %s
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "sanitizer/lsan_interface.h"
+
+int main() {
+  void **p;
+  {
+    __lsan_disable();
+    p = malloc(sizeof(void *));
+    __lsan_enable();
+  }
+  *p = malloc(666);
+  void *q = malloc(1337);
+  // Break optimization.
+  fprintf(stderr, "Test alloc: %p.\n", q);
+  return 0;
+}
+// CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer: 1337 byte(s) leaked in 1 allocation(s)

compiler-rt/test/lsan/TestCases/disabler.cc

@@ -13,11 +13,13 @@ int main() {
   {
     __lsan::ScopedDisabler d;
     p = new void *;
+    fprintf(stderr, "Test alloc p: %p.\n", p);
   }
-  *reinterpret_cast<void **>(p) = malloc(666);
+  *p = malloc(666);
   void *q = malloc(1337);
-  // Break optimization.
-  fprintf(stderr, "Test alloc: %p.\n", q);
+  fprintf(stderr, "Test alloc q: %p.\n", q);
   return 0;
 }
-// CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer: 1337 byte(s) leaked in 1 allocation(s)
+
+// CHECK: Test alloc p: [[ADDR:.*]].
+// CHECK-NOT: [[ADDR]]

compiler-rt/test/lsan/TestCases/disabler_in_tsd_destructor.c

@@ -1,6 +1,6 @@
 // Regression test. Disabler should not depend on TSD validity.
 // RUN: LSAN_BASE="report_objects=1:use_registers=0:use_stacks=0:use_globals=0:use_tls=1"
-// RUN: %clangxx_lsan %s -o %t
+// RUN: %clang_lsan %s -o %t
 // RUN: LSAN_OPTIONS=$LSAN_BASE %run %t
 
 #include <assert.h>
@@ -13,11 +13,12 @@
 pthread_key_t key;
 
 void key_destructor(void *arg) {
-  __lsan::ScopedDisabler d;
+  __lsan_disable();
   void *p = malloc(1337);
   // Break optimization.
   fprintf(stderr, "Test alloc: %p.\n", p);
   pthread_setspecific(key, 0);
+  __lsan_enable();
 }
 
 void *thread_func(void *arg) {

compiler-rt/test/lsan/TestCases/ignore_object.c

@@ -1,6 +1,6 @@
 // Test for __lsan_ignore_object().
 // RUN: LSAN_BASE="report_objects=1:use_registers=0:use_stacks=0:use_globals=0:use_tls=0"
-// RUN: %clangxx_lsan %s -o %t
+// RUN: %clang_lsan %s -o %t
 // RUN: LSAN_OPTIONS=$LSAN_BASE not %run %t 2>&1 | FileCheck %s
 
 #include <stdio.h>
@@ -10,7 +10,7 @@
 
 int main() {
   // Explicitly ignored object.
-  void **p = new void *;
+  void **p = malloc(sizeof(void *));
   // Transitively ignored object.
   *p = malloc(666);
   // Non-ignored object.