| 1 | // Test 'test_only_replace_dlopen_main_program' flag |
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| 2 | |
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| 3 | // RUN: %clangxx %s -pie -fPIE -o %t |
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| 4 | // RUN: env %tool_options='test_only_replace_dlopen_main_program=true' %run %t |
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| 5 | // RUN: env %tool_options='test_only_replace_dlopen_main_program=false' not %run %t |
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| 6 | |
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| 7 | // dladdr is 'nonstandard GNU extensions that are also present on Solaris' |
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| 8 | // REQUIRES: glibc |
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| 9 | |
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| 10 | // Does not intercept dlopen |
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| 11 | // UNSUPPORTED: hwasan, lsan, ubsan |
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| 12 | |
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| 13 | // Flag has no effect with dynamic runtime |
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| 14 | // UNSUPPORTED: asan-dynamic-runtime |
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| 15 | |
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| 16 | #include <dlfcn.h> |
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| 17 | #include <stdio.h> |
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| 18 | #include <stdlib.h> |
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| 19 | |
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| 20 | // We can't use the address of 'main' (error: ISO C++ does not allow 'main' to be used by a program [-Werror,-Wmain]') |
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| 21 | // so we add this function. |
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| 22 | __attribute__((noinline, no_sanitize("address" ))) void foo() { |
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| 23 | printf(format: "Hello World!\n" ); |
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| 24 | } |
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| 25 | |
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| 26 | int main(int argc, char *argv[]) { |
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| 27 | foo(); |
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| 28 | |
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| 29 | // "If filename is NULL, then the returned handle is for the main program." |
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| 30 | void *correct_handle = dlopen(NULL, RTLD_LAZY); |
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| 31 | printf(format: "dlopen(NULL,...): %p\n" , correct_handle); |
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| 32 | |
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| 33 | Dl_info info; |
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| 34 | if (dladdr(address: (void *)&foo, info: &info) == 0) { |
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| 35 | printf(format: "dladdr failed\n" ); |
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| 36 | return 1; |
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| 37 | } |
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| 38 | printf(format: "dladdr(&foo): %s\n" , info.dli_fname); |
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| 39 | void *test_handle = dlopen(file: info.dli_fname, RTLD_LAZY); |
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| 40 | printf(format: "dlopen(%s,...): %p\n" , info.dli_fname, test_handle); |
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| 41 | |
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| 42 | if (test_handle != correct_handle) { |
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| 43 | printf(format: "Error: handles do not match\n" ); |
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| 44 | return 1; |
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| 45 | } |
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| 46 | |
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| 47 | return 0; |
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| 48 | } |
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| 49 | |
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