e4ee12f813
Bug: http://b/78026329 Test: bionic unit tests Merged-In: I806f2bd193998dfe352372476104876edb27aebf Change-Id: I806f2bd193998dfe352372476104876edb27aebf
80 lines
3.4 KiB
C++
80 lines
3.4 KiB
C++
/*
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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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#include <dlfcn.h>
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#include <gtest/gtest.h>
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#include <thread>
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#include "gtest_globals.h"
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#include "utils.h"
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// Access libtest_elftls_shared_var.so's TLS variable using an IE access.
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__attribute__((tls_model("initial-exec"))) extern "C" __thread int elftls_shared_var;
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TEST(elftls_dl, dlopen_shared_var_ie) {
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// libtest_elftls_shared_var_ie.so can be dlopen'ed, even though it contains a
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// TLS IE access, because its IE access references a TLS variable from
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// libtest_elftls_shared_var.so, which is DT_NEEDED by the executable. This
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// pattern appears in sanitizers, which use TLS IE instrumentation in shared
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// objects to access special variables exported from the executable or from a
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// preloaded solib.
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void* lib = dlopen("libtest_elftls_shared_var_ie.so", RTLD_LOCAL | RTLD_NOW);
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ASSERT_NE(nullptr, lib);
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auto bump_shared_var = reinterpret_cast<int(*)()>(dlsym(lib, "bump_shared_var"));
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ASSERT_NE(nullptr, bump_shared_var);
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ASSERT_EQ(21, ++elftls_shared_var);
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ASSERT_EQ(22, bump_shared_var());
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std::thread([bump_shared_var] {
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ASSERT_EQ(21, ++elftls_shared_var);
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ASSERT_EQ(22, bump_shared_var());
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}).join();
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}
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TEST(elftls_dl, dlopen_ie_error) {
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std::string helper = GetTestlibRoot() +
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"/elftls_dlopen_ie_error_helper/elftls_dlopen_ie_error_helper";
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std::string src_path = GetTestlibRoot() + "/libtest_elftls_shared_var_ie.so";
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std::string dst_path = GetTestlibRoot() + "/libtest_elftls_shared_var.so";
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#if defined(__BIONIC__)
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std::string error =
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"dlerror: dlopen failed: TLS symbol \"elftls_shared_var\" in dlopened \"" + dst_path + "\" " +
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"referenced from \"" + src_path + "\" using IE access model\n";
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#else
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// glibc will reserve some surplus static TLS memory, allowing this test to pass.
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std::string error = "success\n";
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#endif
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chmod(helper.c_str(), 0755); // TODO: "x" lost in CTS, b/34945607
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ExecTestHelper eth;
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eth.SetArgs({ helper.c_str(), nullptr });
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eth.Run([&]() { execve(helper.c_str(), eth.GetArgs(), eth.GetEnv()); }, 0, error.c_str());
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}
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