1 // Build a library with origin tracking and an executable w/o origin tracking. 2 // Test that origin tracking is enabled at runtime. 3 // RUN: %clangxx_msan -fsanitize-memory-track-origins -O0 %s -DBUILD_SO -fPIC -shared -o %t-so.so 4 // RUN: %clangxx_msan -O0 %s %t-so.so -o %t && not %run %t 2>&1 | FileCheck %s 5 6 #ifdef BUILD_SO 7 8 #include <stdlib.h> 9 10 extern "C" { 11 void my_access(int *p) { 12 volatile int tmp; 13 // Force initialize-ness check. 14 if (*p) 15 tmp = 1; 16 } 17 18 void *my_alloc(unsigned sz) { 19 return malloc(sz); 20 } 21 } // extern "C" 22 23 #else // BUILD_SO 24 25 #include <stdlib.h> 26 27 extern "C" { 28 void my_access(int *p); 29 void *my_alloc(unsigned sz); 30 } 31 32 int main(int argc, char **argv) { 33 int *x = (int *)my_alloc(sizeof(int)); 34 my_access(x); 35 delete x; 36 37 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value 38 // CHECK: {{#0 0x.* in my_access .*dso-origin.cc:}} 39 // CHECK: {{#1 0x.* in main .*dso-origin.cc:}}[[@LINE-5]] 40 // CHECK: Uninitialized value was created by a heap allocation 41 // CHECK: {{#0 0x.* in .*malloc}} 42 // CHECK: {{#1 0x.* in my_alloc .*dso-origin.cc:}} 43 // CHECK: {{#2 0x.* in main .*dso-origin.cc:}}[[@LINE-10]] 44 // CHECK: SUMMARY: MemorySanitizer: use-of-uninitialized-value {{.*dso-origin.cc:.* my_access}} 45 return 0; 46 } 47 48 #endif // BUILD_SO 49
