| // RUN: %clang -shared -fPIC -D_DSO -O2 -D_FORTIFY_SOURCE=2 %s -o %t.so |
| // RUN: %clang_asan %s -o %t %t.so |
| // RUN: not %run %t 2>&1 | FileCheck %s |
| // REQUIRES: glibc-2.27 |
| #ifdef _DSO |
| #include <stdarg.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| __attribute__((noinline)) char foo(const char *format, ...) { |
| char *write_buffer = (char *)malloc(1); |
| va_list ap; |
| va_start(ap, format); |
| // CHECK: AddressSanitizer: heap-buffer-overflow |
| vsprintf(write_buffer, format, ap); |
| va_end(ap); |
| return write_buffer[0]; |
| } |
| #else |
| extern int foo(const char *format, ...); |
| int main() { return foo("%s_%s", "one", "two"); } |
| #endif |
