1*d21b3d34SFangrui Song // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O0 %s -o %t && not %run %t >%t.out 2>&1 2*d21b3d34SFangrui Song // RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-%short-stack %s < %t.out 3*d21b3d34SFangrui Song // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -O2 %s -o %t && not %run %t >%t.out 2>&1 4*d21b3d34SFangrui Song // RUN: FileCheck --check-prefix=CHECK --check-prefix=CHECK-%short-stack %s < %t.out 5*d21b3d34SFangrui Song 6*d21b3d34SFangrui Song // This is a regression test: there used to be broken "stored to memory at" 7*d21b3d34SFangrui Song // stacks with 8*d21b3d34SFangrui Song // in __msan_memcpy 9*d21b3d34SFangrui Song // in __msan::MsanReallocate 10*d21b3d34SFangrui Song // and nothing below that. 11*d21b3d34SFangrui Song 12*d21b3d34SFangrui Song #include <stdlib.h> main(int argc,char ** argv)13*d21b3d34SFangrui Songint main(int argc, char **argv) { 14*d21b3d34SFangrui Song char *p = (char *)malloc(100); 15*d21b3d34SFangrui Song p = (char *)realloc(p, 10000); 16*d21b3d34SFangrui Song char x = p[50]; 17*d21b3d34SFangrui Song free(p); 18*d21b3d34SFangrui Song return x; 19*d21b3d34SFangrui Song 20*d21b3d34SFangrui Song // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value 21*d21b3d34SFangrui Song // CHECK: {{#0 0x.* in main .*realloc-large-origin.cpp:}}[[@LINE-3]] 22*d21b3d34SFangrui Song 23*d21b3d34SFangrui Song // CHECK: Uninitialized value was stored to memory at 24*d21b3d34SFangrui Song // CHECK-FULL-STACK: {{#0 0x.* in .*realloc}} 25*d21b3d34SFangrui Song // CHECK-FULL-STACK: {{#1 0x.* in main .*realloc-large-origin.cpp:}}[[@LINE-10]] 26*d21b3d34SFangrui Song // CHECK-SHORT-STACK: {{#0 0x.* in .*realloc}} 27*d21b3d34SFangrui Song 28*d21b3d34SFangrui Song // CHECK: Uninitialized value was created by a heap allocation 29*d21b3d34SFangrui Song // CHECK: {{#0 0x.* in .*malloc}} 30*d21b3d34SFangrui Song // CHECK: {{#1 0x.* in main .*realloc-large-origin.cpp:}}[[@LINE-16]] 31*d21b3d34SFangrui Song } 32