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129 lines
4.0 KiB
129 lines
4.0 KiB
/*
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* Copyright (C) 2019 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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// Prevent tests from being compiled with glibc because thread_properties.h
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// only exists in Bionic.
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#if defined(__BIONIC__)
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#include <sys/thread_properties.h>
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#include <assert.h>
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#include <dlfcn.h>
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#include <elf.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sched.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/prctl.h>
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#include <sys/ptrace.h>
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#include <sys/uio.h>
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#include <sys/user.h>
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#include <sys/wait.h>
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#include <unistd.h>
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// Helper binary to use TLS-related functions in thread_properties
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// Tests __get_static_tls_bound.
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thread_local int local_var;
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void test_static_tls_bounds() {
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local_var = 123;
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void* start_addr = nullptr;
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void* end_addr = nullptr;
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__libc_get_static_tls_bounds(reinterpret_cast<void**>(&start_addr),
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reinterpret_cast<void**>(&end_addr));
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assert(start_addr != nullptr);
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assert(end_addr != nullptr);
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assert(&local_var >= start_addr && &local_var < end_addr);
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printf("done_get_static_tls_bounds\n");
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}
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// Tests iterate_dynamic tls chunks.
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// Export a var from the shared so.
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__thread char large_tls_var[4 * 1024 * 1024];
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// found_count has to be Global variable so that the non-capturing lambda
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// can access it.
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int found_count = 0;
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void test_iter_tls() {
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void* lib = dlopen("libtest_elftls_dynamic.so", RTLD_LOCAL | RTLD_NOW);
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large_tls_var[1025] = 'a';
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auto cb = +[](void* dtls_begin, void* dtls_end, size_t dso_id, void* arg) {
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if (&large_tls_var >= dtls_begin && &large_tls_var < dtls_end) ++found_count;
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};
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__libc_iterate_dynamic_tls(gettid(), cb, nullptr);
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// It should be found exactly once.
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assert(found_count == 1);
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printf("done_iterate_dynamic_tls\n");
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}
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void* parent_addr = nullptr;
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void test_iterate_another_thread_tls() {
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large_tls_var[1025] = 'b';
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parent_addr = &large_tls_var;
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found_count = 0;
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pid_t pid = fork();
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assert(pid != -1);
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int status;
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if (pid) {
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// Parent.
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assert(pid == wait(&status));
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assert(0 == status);
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} else {
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// Child.
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pid_t parent_pid = getppid();
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assert(0 == ptrace(PTRACE_ATTACH, parent_pid));
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assert(parent_pid == waitpid(parent_pid, &status, 0));
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auto cb = +[](void* dtls_begin, void* dtls_end, size_t dso_id, void* arg) {
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if (parent_addr >= dtls_begin && parent_addr < dtls_end) ++found_count;
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};
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__libc_iterate_dynamic_tls(parent_pid, cb, nullptr);
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// It should be found exactly once.
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assert(found_count == 1);
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printf("done_iterate_another_thread_tls\n");
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}
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}
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int main() {
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test_static_tls_bounds();
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test_iter_tls();
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test_iterate_another_thread_tls();
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return 0;
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}
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#else
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int main() {
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return 0;
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}
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#endif // __BIONIC__
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