compiler-rt/test/msan/chained_origin_memmove.cpp

   1 // RUN: %clangxx_msan -fno-sanitize-memory-param-retval -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 -fno-sanitize-memory-param-retval -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 -fno-sanitize-memory-param-retval -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 -fno-sanitize-memory-param-retval -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
  56 // CHECK-Z2: Uninitialized value was created by an allocation of 'z2' in the stack frame
  57 // CHECK-Z1: {{#0 .* in main.*chained_origin_memmove.cpp:}}[[@LINE-21]]
  58 // CHECK-Z2: {{#0 .* in main.*chained_origin_memmove.cpp:}}[[@LINE-21]]