File: function-sections-are-bad.cpp

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 995,808 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (41 lines) | stat: -rw-r--r-- 950 bytes parent folder | download | duplicates (52) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
 
// Check that --gc-sections does not throw away (or localize) parts of sanitizer
// interface.
// RUN: %clang_asan %s -Wl,--gc-sections -ldl -o %t
// RUN: %clang_asan %s -DBUILD_SO -fPIC -o %t-so.so -shared
// RUN: %run %t 2>&1

// REQUIRES: asan-64-bits

#ifndef BUILD_SO
#include <assert.h>
#include <dlfcn.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
  char path[4096];
  snprintf(path, sizeof(path), "%s-so.so", argv[0]);

  void *handle = dlopen(path, RTLD_LAZY);
  if (!handle) fprintf(stderr, "%s\n", dlerror());
  assert(handle != 0);

  typedef void (*F)();
  F f = (F)dlsym(handle, "call_rtl_from_dso");
  printf("%s\n", dlerror());
  assert(dlerror() == 0);
  f();
  
  dlclose(handle);
  return 0;
}

#else // BUILD_SO

#include <sanitizer/asan_interface.h>
extern "C" void call_rtl_from_dso() {
  volatile int32_t x;
  volatile int32_t y = __sanitizer_unaligned_load32((void *)&x);
}

#endif // BUILD_SO