mirror of
https://github.com/Atmosphere-NX/Atmosphere-libs.git
synced 2025-10-31 11:36:02 +01:00
136 lines
4.3 KiB
C++
136 lines
4.3 KiB
C++
/*
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* Copyright (c) Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stratosphere.hpp>
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#if defined(ATMOSPHERE_OS_WINDOWS)
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#include <stratosphere/windows.hpp>
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#elif defined(ATMOSPHERE_OS_LINUX) || defined(ATMOSPHERE_OS_MACOS)
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#include <fcntl.h>
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#include <unistd.h>
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#endif
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namespace ams::diag::impl {
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namespace {
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#if defined(ATMOSPHERE_ARCH_X64)
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struct StackFrame {
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u64 fp; /* rbp */
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u64 lr; /* rip */
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};
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#elif defined(ATMOSPHERE_ARCH_X86)
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struct StackFrame {
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u32 fp; /* ebp */
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u32 lr; /* eip */
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}
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#elif defined(ATMOSPHERE_ARCH_ARM64)
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struct StackFrame {
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u64 fp;
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u64 lr;
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};
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#elif defined(ATMOSPHERE_ARCH_ARM)
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struct StackFrame {
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u32 fp;
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u32 lr;
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}
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#else
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#error "Unknown architecture for generic backtrace."
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#endif
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bool TryRead(os::NativeHandle native_handle, void *dst, size_t size, const void *address) {
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#if defined(ATMOSPHERE_OS_WINDOWS)
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return ::ReadProcessMemory(native_handle, address, dst, size, nullptr);
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#elif defined(ATMOSPHERE_OS_LINUX) || defined(ATMOSPHERE_OS_MACOS)
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s32 ret;
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do {
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ret = ::write(native_handle, address, size);
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} while (ret < 0 && errno == EINTR);
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if (ret < 0) {
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return false;
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}
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std::memcpy(dst, address, size);
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return true;
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#else
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#error "Unknown OS for Backtrace native handle"
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#endif
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}
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}
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NOINLINE void Backtrace::Initialize() {
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/* Clear our size. */
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m_index = 0;
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m_size = 0;
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/* Get the base frame pointer. */
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const void *cur_fp = __builtin_frame_address(0);
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/* Try to read stack frames, until we run out. */
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#if defined(ATMOSPHERE_OS_WINDOWS)
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const os::NativeHandle native_handle = ::GetCurrentProcess();
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#elif defined(ATMOSPHERE_OS_LINUX) || defined(ATMOSPHERE_OS_MACOS)
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os::NativeHandle pipe_handles[2];
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s32 nret;
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do { nret = ::pipe(pipe_handles); } while (nret < 0 && errno == EINTR);
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if (nret < 0) { return; }
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do { nret = ::fcntl(pipe_handles[0], F_SETFL, O_NONBLOCK); } while (nret < 0 && errno == EINTR);
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if (nret < 0) { return; }
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do { nret = ::fcntl(pipe_handles[1], F_SETFL, O_NONBLOCK); } while (nret < 0 && errno == EINTR);
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if (nret < 0) { return; }
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ON_SCOPE_EXIT {
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do { nret = ::close(pipe_handles[0]); } while (nret < 0 && errno == EINTR);
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do { nret = ::close(pipe_handles[1]); } while (nret < 0 && errno == EINTR);
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};
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const os::NativeHandle native_handle = pipe_handles[1];
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if (native_handle < 0) { return; }
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#else
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#error "Unknown OS for Backtrace native handle"
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#endif
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StackFrame frame;
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while (m_size < BacktraceEntryCountMax) {
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/* Clear the frame. */
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frame = {};
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/* Read the next frame. */
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if (!TryRead(native_handle, std::addressof(frame), sizeof(frame), cur_fp)) {
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break;
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}
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/* Add the return address. */
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m_backtrace_addresses[m_size++] = reinterpret_cast<void *>(frame.lr);
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/* Set the next fp. */
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cur_fp = reinterpret_cast<const void *>(frame.fp);
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}
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}
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bool Backtrace::Step() {
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return (++m_index) < m_size;
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}
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uintptr_t Backtrace::GetStackPointer() const {
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return 0;
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}
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uintptr_t Backtrace::GetReturnAddress() const {
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return reinterpret_cast<uintptr_t>(m_backtrace_addresses[m_index]);
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}
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}
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