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5d180d1f99
(...and ASSERT_NOT_REACHED => VERIFY_NOT_REACHED) Since all of these checks are done in release builds as well, let's rename them to VERIFY to prevent confusion, as everyone is used to assertions being compiled out in release. We can introduce a new ASSERT macro that is specifically for debug checks, but I'm doing this wholesale conversion first since we've accumulated thousands of these already, and it's not immediately obvious which ones are suitable for ASSERT.
83 lines
3.1 KiB
C++
83 lines
3.1 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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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 are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED 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 OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Assertions.h>
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#include <AK/StackInfo.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef __serenity__
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# include <serenity.h>
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#elif defined(__linux__) or defined(__APPLE__)
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# include <pthread.h>
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#endif
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namespace AK {
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StackInfo::StackInfo()
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{
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#ifdef __serenity__
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if (get_stack_bounds(&m_base, &m_size) < 0) {
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perror("get_stack_bounds");
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VERIFY_NOT_REACHED();
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}
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#elif __linux__
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pthread_attr_t attr = {};
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if (int rc = pthread_getattr_np(pthread_self(), &attr) != 0) {
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fprintf(stderr, "pthread_getattr_np: %s\n", strerror(-rc));
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VERIFY_NOT_REACHED();
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}
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if (int rc = pthread_attr_getstack(&attr, (void**)&m_base, &m_size) != 0) {
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fprintf(stderr, "pthread_attr_getstack: %s\n", strerror(-rc));
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VERIFY_NOT_REACHED();
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}
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pthread_attr_destroy(&attr);
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#elif __APPLE__
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// NOTE: !! On MacOS, pthread_get_stackaddr_np gives the TOP of the stack, not the bottom!
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FlatPtr top_of_stack = (FlatPtr)pthread_get_stackaddr_np(pthread_self());
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m_size = (size_t)pthread_get_stacksize_np(pthread_self());
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// https://github.com/rust-lang/rust/issues/43347#issuecomment-316783599
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// https://developer.apple.com/library/archive/qa/qa1419/_index.html
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//
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// MacOS seems inconsistent on what stack size is given for the main thread.
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// According to the Apple docs, default for main thread is 8MB, and default for
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// other threads is 512KB
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constexpr size_t eight_megabytes = 0x800000;
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if (pthread_main_np() == 1 && m_size < eight_megabytes) {
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// Assume no one messed with stack size linker options for the main thread,
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// and just set it to 8MB.
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m_size = eight_megabytes;
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}
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m_base = top_of_stack - m_size;
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#else
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VERIFY_NOT_REACHED();
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#endif
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m_top = m_base + m_size;
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}
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}
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