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Diffstat (limited to 'test/msan/realloc-origin.cc')
-rw-r--r-- | test/msan/realloc-origin.cc | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/msan/realloc-origin.cc b/test/msan/realloc-origin.cc new file mode 100644 index 000000000000..6707cc9049a4 --- /dev/null +++ b/test/msan/realloc-origin.cc @@ -0,0 +1,21 @@ +// RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O0 %s -o %t && not %run %t >%t.out 2>&1 +// RUN: FileCheck %s < %t.out +// RUN: %clangxx_msan -fsanitize-memory-track-origins -m64 -O2 %s -o %t && not %run %t >%t.out 2>&1 +// RUN: FileCheck %s < %t.out + +// This test relies on realloc from 100 to 101 being done in-place. + +#include <stdlib.h> +int main(int argc, char **argv) { + char *p = (char *)malloc(100); + p = (char *)realloc(p, 101); + char x = p[100]; + free(p); + return x; + // CHECK: WARNING: MemorySanitizer: use-of-uninitialized-value + // CHECK: {{#0 0x.* in main .*realloc-origin.cc:}}[[@LINE-2]] + + // CHECK: Uninitialized value was created by a heap allocation + // CHECK: {{#0 0x.* in .*realloc}} + // CHECK: {{#1 0x.* in main .*realloc-origin.cc:}}[[@LINE-9]] +} |