1 // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -DOFFSET=0 -O3 %s -o %t && \ 2 // RUN: not %run %t >%t.out 2>&1 3 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 --check-prefix=CHECK-%short-stack < %t.out 4 5 // RUN: %clangxx_msan -fsanitize-memory-track-origins=2 -DOFFSET=10 -O3 %s -o %t && \ 6 // RUN: not %run %t >%t.out 2>&1 7 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 --check-prefix=CHECK-%short-stack < %t.out 8 9 // RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DOFFSET=0 -O3 %s -o %t && \ 10 // RUN: not %run %t >%t.out 2>&1 11 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 --check-prefix=CHECK-%short-stack < %t.out 12 13 // RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DOFFSET=10 -O3 %s -o %t && \ 14 // RUN: not %run %t >%t.out 2>&1 15 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 --check-prefix=CHECK-%short-stack < %t.out 16 17 #include <stdio.h> 18 #include <string.h> 19 20 int xx[10000]; 21 volatile int idx = 30; 22 23 __attribute__((noinline)) void fn_g(int a, int b) { 24 xx[idx + OFFSET] = OFFSET == 0 ? a : b; 25 } 26 27 __attribute__((noinline)) void fn_f(int a, int b) { 28 fn_g(a, b); 29 } 30 31 __attribute__((noinline)) void fn_h() { 32 memmove(&xx[25], &xx, 7500); 33 } 34 35 int main(int argc, char *argv[]) { 36 int volatile z1; 37 int volatile z2; 38 fn_f(z1, z2); 39 fn_h(); 40 return xx[25 + idx + OFFSET]; 41 } 42 43 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value 44 // CHECK: {{#0 .* in main .*chained_origin_memmove.cpp:}}[[@LINE-4]] 45 46 // CHECK: Uninitialized value was stored to memory at 47 // CHECK-FULL-STACK: {{#1 .* in fn_h.*chained_origin_memmove.cpp:}}[[@LINE-15]] 48 // CHECK-SHORT-STACK: {{#0 .* in __msan_memmove.*msan_interceptors.cpp:}} 49 50 // CHECK: Uninitialized value was stored to memory at 51 // CHECK-FULL-STACK: {{#0 .* in fn_g.*chained_origin_memmove.cpp:}}[[@LINE-27]] 52 // CHECK-FULL-STACK: {{#1 .* in fn_f.*chained_origin_memmove.cpp:}}[[@LINE-24]] 53 // CHECK-SHORT-STACK: {{#0 .* in fn_g.*chained_origin_memmove.cpp:}}[[@LINE-29]] 54 55 // CHECK-Z1: Uninitialized value was created by an allocation of 'z1' in the stack frame of function 'main' 56 // CHECK-Z2: Uninitialized value was created by an allocation of 'z2' in the stack frame of function 'main' 57 // CHECK: {{#0 .* in main.*chained_origin_memmove.cpp:}}[[@LINE-22]] 58