1 // RUN: %clang -shared -fPIC -D_DSO -O2 -D_FORTIFY_SOURCE=2 %s -o %t.so 2 // RUN: %clang_asan %s -o %t %t.so 3 // RUN: not %run %t 2>&1 | FileCheck %s 4 // REQUIRES: glibc-2.27 5 #ifdef _DSO 6 #include <stdarg.h> 7 #include <stdio.h> 8 #include <stdlib.h> 9 #include <string.h> foo(const char * format,...)10__attribute__((noinline)) char foo(const char *format, ...) { 11 char *write_buffer = (char *)malloc(1); 12 va_list ap; 13 va_start(ap, format); 14 // CHECK: AddressSanitizer: heap-buffer-overflow 15 vsprintf(write_buffer, format, ap); 16 va_end(ap); 17 return write_buffer[0]; 18 } 19 #else 20 extern int foo(const char *format, ...); main()21int main() { return foo("%s_%s", "one", "two"); } 22 #endif 23