third_party/android_crazy_linker/src/tests/bar_with_relro.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <android/log.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8
   9 // A variant of bar.cpp that also includes a large RELRO section.
  10 // Used to test RELRO sharing with two different libraries at the
  11 // same time.
  12
  13 // This is a large table that contains pointers to ensure that it
  14 // gets put inside the RELRO section.
  15 #define LINE "another example string",
  16 #define LINE8 LINE LINE LINE LINE LINE LINE LINE LINE
  17 #define LINE64 LINE8 LINE8 LINE8 LINE8 LINE8 LINE8 LINE8 LINE8
  18 #define LINE512 LINE64 LINE64 LINE64 LINE64 LINE64 LINE64 LINE64 LINE64
  19 #define LINE4096 LINE512 LINE512 LINE512 LINE512 LINE512 LINE512 LINE512 LINE512
  20
  21 const char* const kStrings[] = {LINE4096 LINE4096 LINE4096 LINE4096};
  22
  23 extern "C" void Foo();
  24
  25 extern "C" void Bar() {
  26   printf("%s: Entering\n", __FUNCTION__);
  27   __android_log_print(ANDROID_LOG_INFO, "bar", "Hi There!");
  28   fprintf(stderr, "Hi There! from Bar\n");
  29
  30   for (size_t n = 0; n < sizeof(kStrings) / sizeof(kStrings[0]); ++n) {
  31     const char* ptr = kStrings[n];
  32     if (strcmp(ptr, "another example string")) {
  33       printf("%s: Bad string at offset=%zu\n", __FUNCTION__, n);
  34       exit(1);
  35     }
  36   }
  37
  38   printf("%s: Calling Foo()\n", __FUNCTION__);
  39   Foo();
  40
  41   printf("%s: Exiting\n", __FUNCTION__);
  42 }