compiler-rt/test/msan/chained_origin_memcpy.cpp

   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
  10 // RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DOFFSET=0 -O3 %s -o %t && \
  11 // RUN:     not %run %t >%t.out 2>&1
  12 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z1 --check-prefix=CHECK-%short-stack < %t.out
  13
  14 // RUN: %clangxx_msan -mllvm -msan-instrumentation-with-call-threshold=0 -fsanitize-memory-track-origins=2 -DOFFSET=10 -O3 %s -o %t && \
  15 // RUN:     not %run %t >%t.out 2>&1
  16 // RUN: FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-Z2 --check-prefix=CHECK-%short-stack < %t.out
  17
  18 #include <stdio.h>
  19 #include <string.h>
  20
  21 int xx[10000];
  22 int yy[10000];
  23 volatile int idx = 30;
  24
  25 __attribute__((noinline))
  26 void fn_g(int a, int b) {
  27   xx[idx] = a; xx[idx + 10] = b;
  28 }
  29
  30 __attribute__((noinline))
  31 void fn_f(int a, int b) {
  32   fn_g(a, b);
  33 }
  34
  35 __attribute__((noinline))
  36 void fn_h() {
  37   memcpy(&yy, &xx, sizeof(xx));
  38 }
  39
  40 int main(int argc, char *argv[]) {
  41   int volatile z1;
  42   int volatile z2;
  43   fn_f(z1, z2);
  44   fn_h();
  45   return yy[idx + OFFSET];
  46 }
  47
  48 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  49 // CHECK: {{#0 .* in main .*chained_origin_memcpy.cpp:}}[[@LINE-4]]
  50
  51 // CHECK: Uninitialized value was stored to memory at
  52 // CHECK-FULL-STACK: {{#1 .* in fn_h.*chained_origin_memcpy.cpp:}}[[@LINE-15]]
  53 // CHECK-SHORT-STACK: {{#0 .* in __msan_memcpy.*msan_interceptors.cpp:}}
  54
  55 // CHECK: Uninitialized value was stored to memory at
  56 // CHECK-FULL-STACK: {{#0 .* in fn_g.*chained_origin_memcpy.cpp:}}[[@LINE-29]]
  57 // CHECK-FULL-STACK: {{#1 .* in fn_f.*chained_origin_memcpy.cpp:}}[[@LINE-25]]
  58 // CHECK-SHORT-STACK: {{#0 .* in fn_g.*chained_origin_memcpy.cpp:}}[[@LINE-31]]
  59
  60 // CHECK-Z1: Uninitialized value was created by an allocation of 'z1' in the stack frame of function 'main'
  61 // CHECK-Z2: Uninitialized value was created by an allocation of 'z2' in the stack frame of function 'main'
  62 // CHECK: {{#0 .* in main.*chained_origin_memcpy.cpp:}}[[@LINE-22]]