Zach Anderson
f407419d0a
This relands https://dart-review.googlesource.com/c/sdk/+/205633 but without renaming TARGET_OS_IPHONE to DART_TARGET_OS_IPHONE. It also changes uses of TARGET_OS_IOS to DART_TARGET_OS_MACOS_IOS to be consistent with the rest of the VM. TargetConditionals.h for XCode 13 defines several TARGET_OS_* preprocessor symbols that confuse the Dart build. There is probably a more targeted fix for this, but renaming the symbols that Dart uses will also prevent this problem if more symbols are added to the platform headers in the future. See: https://github.com/dart-lang/sdk/issues/46499 TEST=It builds. Change-Id: Ie775c19dd23cfdf5f65e5ebc6ee4ec3a561676fa Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/205860 Commit-Queue: Zach Anderson <zra@google.com> Reviewed-by: Alexander Aprelev <aam@google.com>
121 lines
3.3 KiB
C++
121 lines
3.3 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/globals.h"
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#include "vm/instructions.h"
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#include "vm/signal_handler.h"
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#include "vm/simulator.h"
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#if defined(DART_HOST_OS_LINUX)
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namespace dart {
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uintptr_t SignalHandler::GetProgramCounter(const mcontext_t& mcontext) {
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uintptr_t pc = 0;
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#if defined(HOST_ARCH_IA32)
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pc = static_cast<uintptr_t>(mcontext.gregs[REG_EIP]);
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#elif defined(HOST_ARCH_X64)
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pc = static_cast<uintptr_t>(mcontext.gregs[REG_RIP]);
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#elif defined(HOST_ARCH_ARM)
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pc = static_cast<uintptr_t>(mcontext.arm_pc);
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#elif defined(HOST_ARCH_ARM64)
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pc = static_cast<uintptr_t>(mcontext.pc);
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#else
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#error Unsupported architecture.
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#endif // HOST_ARCH_...
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return pc;
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}
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uintptr_t SignalHandler::GetFramePointer(const mcontext_t& mcontext) {
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uintptr_t fp = 0;
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#if defined(HOST_ARCH_IA32)
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fp = static_cast<uintptr_t>(mcontext.gregs[REG_EBP]);
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#elif defined(HOST_ARCH_X64)
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fp = static_cast<uintptr_t>(mcontext.gregs[REG_RBP]);
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#elif defined(HOST_ARCH_ARM)
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// B1.3.3 Program Status Registers (PSRs)
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if ((mcontext.arm_cpsr & (1 << 5)) != 0) {
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// Thumb mode.
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fp = static_cast<uintptr_t>(mcontext.arm_r7);
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} else {
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// ARM mode.
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fp = static_cast<uintptr_t>(mcontext.arm_fp);
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}
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#elif defined(HOST_ARCH_ARM64)
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fp = static_cast<uintptr_t>(mcontext.regs[29]);
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#else
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#error Unsupported architecture.
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#endif // HOST_ARCH_...
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return fp;
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}
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uintptr_t SignalHandler::GetCStackPointer(const mcontext_t& mcontext) {
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uintptr_t sp = 0;
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#if defined(HOST_ARCH_IA32)
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sp = static_cast<uintptr_t>(mcontext.gregs[REG_ESP]);
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#elif defined(HOST_ARCH_X64)
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sp = static_cast<uintptr_t>(mcontext.gregs[REG_RSP]);
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#elif defined(HOST_ARCH_ARM)
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sp = static_cast<uintptr_t>(mcontext.arm_sp);
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#elif defined(HOST_ARCH_ARM64)
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sp = static_cast<uintptr_t>(mcontext.sp);
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#else
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#error Unsupported architecture.
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#endif // HOST_ARCH_...
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return sp;
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}
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uintptr_t SignalHandler::GetDartStackPointer(const mcontext_t& mcontext) {
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#if defined(TARGET_ARCH_ARM64) && !defined(USING_SIMULATOR)
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return static_cast<uintptr_t>(mcontext.regs[SPREG]);
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#else
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return GetCStackPointer(mcontext);
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#endif
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}
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uintptr_t SignalHandler::GetLinkRegister(const mcontext_t& mcontext) {
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uintptr_t lr = 0;
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#if defined(HOST_ARCH_IA32)
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lr = 0;
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#elif defined(HOST_ARCH_X64)
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lr = 0;
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#elif defined(HOST_ARCH_ARM)
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lr = static_cast<uintptr_t>(mcontext.arm_lr);
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#elif defined(HOST_ARCH_ARM64)
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lr = static_cast<uintptr_t>(mcontext.regs[30]);
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#else
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#error Unsupported architecture.
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#endif // HOST_ARCH_...
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return lr;
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}
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void SignalHandler::InstallImpl(SignalAction action) {
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struct sigaction act = {};
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act.sa_handler = NULL;
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act.sa_sigaction = action;
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sigemptyset(&act.sa_mask);
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act.sa_flags = SA_RESTART | SA_SIGINFO;
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int r = sigaction(SIGPROF, &act, NULL);
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ASSERT(r == 0);
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}
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void SignalHandler::Remove() {
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// Ignore future SIGPROF signals because by default SIGPROF will terminate
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// the process and we may have some signals in flight.
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struct sigaction act = {};
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act.sa_handler = SIG_IGN;
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sigemptyset(&act.sa_mask);
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act.sa_flags = 0;
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int r = sigaction(SIGPROF, &act, NULL);
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ASSERT(r == 0);
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}
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} // namespace dart
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#endif // defined(DART_HOST_OS_LINUX)
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