forked from OSchip/llvm-project
34 lines
934 B
C
34 lines
934 B
C
// Test shadow faults during esan initialization as well as
|
|
// faults during dlsym's calloc during interceptor init.
|
|
//
|
|
// RUN: %clang_esan_wset %s -o %t
|
|
// RUN: %run %t 2>&1 | FileCheck %s
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
// Our goal is to emulate an instrumented allocator, whose calloc
|
|
// invoked from dlsym will trigger shadow faults, to test an
|
|
// early shadow fault during esan interceptor init.
|
|
// We do this by replacing calloc:
|
|
void *calloc(size_t size, size_t n) {
|
|
// Unfortunately we can't print anything to make the test
|
|
// ensure we got here b/c the sanitizer interceptors can't
|
|
// handle that during interceptor init.
|
|
|
|
// Ensure we trigger a shadow write fault:
|
|
int x[16];
|
|
x[0] = size;
|
|
// Now just emulate calloc.
|
|
void *res = malloc(size*n);
|
|
memset(res, 0, size*n);
|
|
return res;
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
printf("all done\n");
|
|
return 0;
|
|
}
|
|
// CHECK: all done
|