compiler-rt/test/lsan/TestCases/use_globals_unused.cpp

   1 // Test that unused globals are included in the root set.
   2 // RUN: %clangxx_lsan -O2 %s -DTEST_LIB -c -o %t.o
   3 // RUN: %clangxx_lsan -O2 %s %t.o -o %t
   4 // RUN: %env_lsan_opts="use_stacks=0:use_registers=0:use_globals=1" %run %t 2>&1 | FileCheck %s --implicit-check-not=leak
   5 // RUN: %env_lsan_opts="" %run %t 2>&1 | FileCheck %s --implicit-check-not=leak
   6
   7 // FIXME: This check is not very important and fails on arm7.
   8 // %env_lsan_opts="use_stacks=0:use_registers=0:use_globals=0" not %run %t 2>&1 | FileCheck %s --check-prefixes=LEAK
   9
  10 #include <stdio.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13
  14 #ifdef TEST_LIB
  15
  16 void set(char *a) {
  17   strcpy(a, "hello");
  18 }
  19
  20 #else
  21
  22 static void *g;
  23
  24 void set(char *a);
  25 void foo(void *a) {
  26   // Store from a different function to suppress global localization.
  27   g = a;
  28 }
  29
  30 int main() {
  31   char a[10];
  32   set(a);
  33   char *b = strdup(a);
  34   printf("%p %s\n", b, b);
  35   g = b;
  36 }
  37
  38 #endif
  39
  40 // LEAK: LeakSanitizer: detected memory leaks