[asan] Don't check ODR violations for particular types of globals

Summary:
private and internal: should not trigger ODR at all.
unnamed_addr: current ODR checking approach fail and rereport false violation if
a linker merges such globals
linkonce_odr, weak_odr: could cause similar problems and they are already not
instrumented for ELF.

Reviewers: eugenis, kcc

Subscribers: kubamracek, hiraditya, llvm-commits

Differential Revision: https://reviews.llvm.org/D55621

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@349015 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 26 insertions, 0 deletions

diff --git a/test/asan/TestCases/Linux/odr_indicators.cc b/test/asan/TestCases/Linux/odr_indicators.cc
new file mode 100644
index 000000000..36176b552
--- /dev/null
+++ b/test/asan/TestCases/Linux/odr_indicators.cc
@@ -0,0 +1,26 @@
+// RUN: %clangxx_asan -fPIC %s -o %t
+// RUN: %env_asan_opts=report_globals=2 %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK,INDICATOR0
+
+// RUN: %clangxx_asan -fsanitize-address-use-odr-indicator -fPIC %s -o %t
+// RUN: %env_asan_opts=report_globals=2 %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK,INDICATOR1
+
+#include <stdio.h>
+
+int test_global_1;
+// INDICATOR0-DAG: Added Global{{.*}} name=test_global_1{{.*}} odr_indicator={{0x0+$}}
+// INDICATOR1-DAG: Added Global{{.*}} name=test_global_1{{.*}} odr_indicator={{0x0*[^0]+.*$}}
+
+static int test_global_2;
+// CHECK-DAG: Added Global{{.*}} name=test_global_2{{.*}} odr_indicator={{0xf+$}}
+
+namespace {
+static int test_global_3;
+// CHECK-DAG: Added Global{{.*}} name={{.*}}::test_global_3{{.*}} odr_indicator={{0xf+$}}
+} // namespace
+
+int main() {
+  const char f[] = "%d %d %d\n";
+  // CHECK-DAG: Added Global{{.*}} name=__const.main.f{{.*}} odr_indicator={{0xf+$}}
+  printf(f, test_global_1, test_global_2, test_global_3);
+  return 0;
+}