[sanitizer] Small buffer tests for __sanitizer_symbolize_pc

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@343534 91177308-0d34-0410-b5e6-96231b3b80d8

Author: vitalybuka

test/sanitizer_common/TestCases/symbolize_pc.cc

@@ -7,6 +7,17 @@
 
 int GLOBAL_VAR_ABC;
 
+void SymbolizeSmallBuffer() {
+  char data[] = "abcdef";
+  __sanitizer_symbolize_pc(__builtin_return_address(0), "%p %F %L", data, 0);
+  printf("UNCHANGED '%s'\n", data);
+  __sanitizer_symbolize_pc(__builtin_return_address(0), "%p %F %L", data, 1);
+  printf("EMPTY '%s'\n", data);
+  __sanitizer_symbolize_pc(__builtin_return_address(0), "%p %F %L", data,
+                           sizeof(data));
+  printf("PARTIAL '%s'\n", data);
+}
+
 void SymbolizeCaller() {
   char data[100];
   __sanitizer_symbolize_pc(__builtin_return_address(0), "%p %F %L", data,
@@ -31,10 +42,16 @@ void SymbolizeData() {
   printf("GLOBAL: %s\n", data);
 }
 
-// CHECK: FIRST_FORMAT 0x{{.*}} in main symbolize_pc.cc:[[@LINE+3]]
-// CHECK: SECOND_FORMAT FUNC:main LINE:[[@LINE+2]] FILE:symbolize_pc.cc
 int main() {
+  // CHECK: UNCHANGED 'abcdef'
+  // CHECK: EMPTY ''
+  // CHECK: PARTIAL '0x{{.*}}'
+  SymbolizeSmallBuffer();
+
+  // CHECK: FIRST_FORMAT 0x{{.*}} in main symbolize_pc.cc:[[@LINE+2]]
+  // CHECK: SECOND_FORMAT FUNC:main LINE:[[@LINE+1]] FILE:symbolize_pc.cc
   SymbolizeCaller();
+
+  // CHECK: GLOBAL: GLOBAL_VAR_ABC
   SymbolizeData();
 }
-// CHECK: GLOBAL: GLOBAL_VAR_ABC