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// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef RUNTIME_VM_SIGNAL_HANDLER_H_
#define RUNTIME_VM_SIGNAL_HANDLER_H_
#include "vm/allocation.h"
#include "vm/globals.h"
#if defined(DART_HOST_OS_LINUX)
#include <signal.h> // NOLINT
#include <ucontext.h> // NOLINT
#elif defined(DART_HOST_OS_ANDROID)
#include <signal.h> // NOLINT
#if !defined(__BIONIC_HAVE_UCONTEXT_T)
#include <asm/sigcontext.h> // NOLINT
// If ucontext_t is not defined on Android, define it here.
typedef struct sigcontext mcontext_t;
typedef struct ucontext {
uint32_t uc_flags;
struct ucontext* uc_link;
stack_t uc_stack;
struct sigcontext uc_mcontext;
uint32_t uc_sigmask;
} ucontext_t;
#endif // !defined(__BIONIC_HAVE_UCONTEXT_T)
#elif defined(DART_HOST_OS_MACOS)
#include <signal.h> // NOLINT
#include <sys/ucontext.h> // NOLINT
#elif defined(DART_HOST_OS_WINDOWS)
// Stub out for windows.
struct siginfo_t;
struct mcontext_t;
struct sigset_t {};
#elif defined(DART_HOST_OS_FUCHSIA)
#include <signal.h> // NOLINT
#include <ucontext.h> // NOLINT
#endif
namespace dart {
typedef void (*SignalAction)(int signal, siginfo_t* info, void* context);
class SignalHandler : public AllStatic {
public:
static void Install(SignalAction action);
static void Remove();
static uintptr_t GetProgramCounter(const mcontext_t& mcontext);
static uintptr_t GetFramePointer(const mcontext_t& mcontext);
static uintptr_t GetCStackPointer(const mcontext_t& mcontext);
static uintptr_t GetDartStackPointer(const mcontext_t& mcontext);
static uintptr_t GetLinkRegister(const mcontext_t& mcontext);
#if defined(DART_HOST_OS_ANDROID)
// Prepare current thread for handling interrupts. Returns
// opaque pointer to the allocated state (if any).
static void* PrepareCurrentThread();
// Cleanup any state which was created by |PrepareCurrentThread|.
static void CleanupCurrentThreadState(void* state);
#endif
};
#undef USE_SIGNAL_HANDLER_TRAMPOLINE
} // namespace dart
#endif // RUNTIME_VM_SIGNAL_HANDLER_H_