compiler-rt/test/msan/chained_origin_memcpy.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 int yy[10000];
  22 volatile int idx = 30;
  23
  24 __attribute__((noinline))
  25 void fn_g(int a, int b) {
  26   xx[idx] = a; xx[idx + 10] = b;
  27 }
  28
  29 __attribute__((noinline))
  30 void fn_f(int a, int b) {
  31   fn_g(a, b);
  32 }
  33
  34 __attribute__((noinline))
  35 void fn_h() {
  36   memcpy(&yy, &xx, sizeof(xx));
  37 }
  38
  39 int main(int argc, char *argv[]) {
  40   int volatile z1;
  41   int volatile z2;
  42   fn_f(z1, z2);
  43   fn_h();
  44   return yy[idx + OFFSET];
  45 }
  46
  47 // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value
  48 // CHECK: {{#0 .* in main .*chained_origin_memcpy.cpp:}}[[@LINE-4]]
  49
  50 // CHECK: Uninitialized value was stored to memory at
  51 // CHECK-FULL-STACK: {{#1 .* in fn_h.*chained_origin_memcpy.cpp:}}[[@LINE-15]]
  52 // CHECK-SHORT-STACK: {{#0 .* in __msan_memcpy.*msan_interceptors.cpp:}}
  53
  54 // CHECK: Uninitialized value was stored to memory at
  55 // CHECK-FULL-STACK: {{#0 .* in fn_g.*chained_origin_memcpy.cpp:}}[[@LINE-29]]
  56 // CHECK-FULL-STACK: {{#1 .* in fn_f.*chained_origin_memcpy.cpp:}}[[@LINE-25]]
  57 // CHECK-SHORT-STACK: {{#0 .* in fn_g.*chained_origin_memcpy.cpp:}}[[@LINE-31]]
  58
  59 // CHECK-Z1: Uninitialized value was created by an allocation of 'z1' in the stack frame
  60 // CHECK-Z2: Uninitialized value was created by an allocation of 'z2' in the stack frame
  61 // CHECK-Z1: {{#0 .* in main.*chained_origin_memcpy.cpp:}}[[@LINE-21]]
  62 // CHECK-Z2: {{#0 .* in main.*chained_origin_memcpy.cpp:}}[[@LINE-21]]