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 #include "test_support.h"
  14
  15 int main(int argc, const char* argv[], const char* envp[], const char* apple[]) {
  16     ///
  17     /// This tests that RTLD_LOCAL prevents RTLD_DEFAULT from finding symbols, but can be found via handle
  18     ///
  19     void* handle = dlopen(RUN_DIR "/libfoo.dylib", RTLD_LOCAL);
  20     if ( handle == NULL ) {
  21         FAIL("dlopen(\"libfoo.dylib\", RTLD_LOCAL) failed but it should have worked: %s", dlerror());
  22     }
  23     void* sym = dlsym(handle, "foo");
  24     if ( sym == NULL ) {
  25         FAIL("dlsym(handle, \"foo\") failed but it should have worked: %s", dlerror());
  26     }
  27     void* sym2 = dlsym(RTLD_DEFAULT, "foo");
  28     if ( sym2 != NULL ) {
  29         FAIL("dlsym(RTLD_DEFAULT, \"foo\") succeeded but it should have failed");
  30     }
  31
  32     ///
  33     /// This tests that RTLD_GLOBAL after RTLD_LOCAL allows RTLD_DEFAULT to find symbols
  34     ///
  35     void* handle2 = dlopen(RUN_DIR "/libfoo.dylib", RTLD_GLOBAL);
  36     if ( handle2 == NULL ) {
  37         FAIL("dlopen(\"libfoo.dylib\", RTLD_GLOBAL) failed but it should have worked: %s", dlerror());
  38     }
  39     void* sym3 = dlsym(RTLD_DEFAULT, "foo");
  40     if ( sym3 == NULL ) {
  41         FAIL("dlsym(RTLD_DEFAULT, \"foo\") failed after upgrading to RTLD_GLOBAL");
  42     }
  43
  44     ///
  45     /// This tests that RTLD_LOCAL after RTLD_GLOBAL does not block RTLD_DEFAULT from finding symbols
  46     ///
  47     void* handle3 = dlopen(RUN_DIR "/libbar.dylib", RTLD_GLOBAL);
  48     if ( handle3 == NULL ) {
  49         FAIL("dlopen(\"libbar.dylib\", RTLD_GLOBAL) failed but it should have worked: %s", dlerror());
  50     }
  51     void* handle4 = dlopen(RUN_DIR "/libbar.dylib", RTLD_LOCAL);
  52     if ( handle4 == NULL ) {
  53         FAIL("dlopen(\"libbar.dylib\", RTLD_LOCAL) failed but it should have worked: %s", dlerror());
  54     }
  55     void* sym4 = dlsym(RTLD_DEFAULT, "bar");
  56     if ( sym4 == NULL ) {
  57         FAIL("dlsym(RTLD_DEFAULT, \"bar\") failed but it should have worked: %s", dlerror());
  58     }
  59
  60     PASS("Success");
  61 }