testing/test-cases/dlopen-RTLD_LOCAL-hides.dtest/main.c

   1
   2 // BUILD:  $CC foo.c -dynamiclib  -install_name $RUN_DIR/libfoo.dylib -o $BUILD_DIR/libfoo.dylib
   3 // BUILD:  $CC bar.c -dynamiclib  -install_name $RUN_DIR/libbar.dylib -o $BUILD_DIR/libbar.dylib
   4 // BUILD:  $CC main.c -o $BUILD_DIR/dlopen-RTLD_LOCAL-hides.exe -DRUN_DIR="$RUN_DIR"
   5
   6 // RUN:  ./dlopen-RTLD_LOCAL-hides.exe
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <dlfcn.h>
  12
  13
  14 int main()
  15 {
  16     printf("[BEGIN] dlopen-RTLD_LOCAL-hides\n");
  17
  18     ///
  19     /// This tests that RTLD_LOCAL prevents RTLD_DEFAULT from finding symbols, but can be found via handle
  20     ///
  21     void* handle = dlopen(RUN_DIR "/libfoo.dylib", RTLD_LOCAL);
  22     if ( handle == NULL ) {
  23         printf("[FAIL] dlopen-RTLD_LOCAL-hides: dlopen(libfoo.dylib, RTLD_LOCAL) failed but it should have worked: %s\n", dlerror());
  24         return 0;
  25     }
  26     void* sym = dlsym(handle, "foo");
  27     if ( sym == NULL ) {
  28         printf("[FAIL] dlopen-RTLD_LOCAL-hides: dlsym(handle, \"foo\") failed but it should have worked: %s\n", dlerror());
  29         return 0;
  30     }
  31     void* sym2 = dlsym(RTLD_DEFAULT, "foo");
  32     if ( sym2 != NULL ) {
  33         printf("[FAIL] dlopen-RTLD_LOCAL-hides: dlsym(RTLD_DEFAULT, \"foo\") succeeded but it should have failed\n");
  34         return 0;
  35     }
  36
  37
  38     ///
  39     /// This tests that RTLD_GLOBAL after RTLD_LOCAL allows RTLD_DEFAULT to find symbols
  40     ///
  41     void* handle2 = dlopen(RUN_DIR "/libfoo.dylib", RTLD_GLOBAL);
  42     if ( handle2 == NULL ) {
  43         printf("[FAIL] dlopen-RTLD_LOCAL-hides: dlopen(libfoo.dylib, RTLD_GLOBAL) failed but it should have worked: %s\n", dlerror());
  44         return 0;
  45     }
  46     void* sym3 = dlsym(RTLD_DEFAULT, "foo");
  47     if ( sym3 == NULL ) {
  48         printf("[FAIL] dlopen-RTLD_LOCAL-hides: dlsym(RTLD_DEFAULT, \"foo\") failed after upgrading to RTLD_GLOBAL\n");
  49         return 0;
  50     }
  51
  52
  53     ///
  54     /// This tests that RTLD_LOCAL after RTLD_GLOBAL does not block RTLD_DEFAULT from finding symbols
  55     ///
  56     void* handle3 = dlopen(RUN_DIR "/libbar.dylib", RTLD_GLOBAL);
  57     if ( handle3 == NULL ) {
  58         printf("[FAIL] dlopen-RTLD_LOCAL-hides: dlopen(libbar.dylib, RTLD_GLOBAL) failed but it should have worked: %s\n", dlerror());
  59         return 0;
  60     }
  61     void* handle4 = dlopen(RUN_DIR "/libbar.dylib", RTLD_LOCAL);
  62     if ( handle4 == NULL ) {
  63         printf("[FAIL] dlopen-RTLD_LOCAL-hides: dlopen(libbar.dylib, RTLD_LOCAL) failed but it should have worked: %s\n", dlerror());
  64         return 0;
  65     }
  66     void* sym4 = dlsym(RTLD_DEFAULT, "bar");
  67     if ( sym4 == NULL ) {
  68         printf("[FAIL] dlopen-RTLD_LOCAL-hides: dlsym(RTLD_DEFAULT, \"bar\") failed but it should have worked: %s\n", dlerror());
  69         return 0;
  70     }
  71
  72     printf("[PASS] dlopen-RTLD_LOCAL-hides\n");
  73     return 0;
  74 }