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// Copyright 2014, ARM Limited
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of ARM Limited nor the names of its contributors may be
// used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifdef JS_SIMULATOR_ARM64
#ifndef VIXL_A64_DEBUGGER_A64_H_
#define VIXL_A64_DEBUGGER_A64_H_
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include "jit/arm64/vixl/Constants-vixl.h"
#include "jit/arm64/vixl/Globals-vixl.h"
#include "jit/arm64/vixl/Simulator-vixl.h"
#include "jit/arm64/vixl/Utils-vixl.h"
namespace vixl {
// Flags that represent the debugger state.
enum DebugParameters {
DBG_INACTIVE = 0,
DBG_ACTIVE = 1 << 0, // The debugger is active.
DBG_BREAK = 1 << 1 // The debugger is at a breakpoint.
};
// Forward declarations.
class DebugCommand;
class Token;
class FormatToken;
class Debugger : public Simulator {
public:
explicit Debugger(Decoder* decoder, FILE* stream = stdout);
~Debugger();
virtual void Run() override;
virtual void VisitException(const Instruction* instr) override;
int debug_parameters() const { return debug_parameters_; }
void set_debug_parameters(int parameters) {
debug_parameters_ = parameters;
update_pending_request();
}
// Numbers of instructions to execute before the debugger shell is given
// back control.
int64_t steps() const { return steps_; }
void set_steps(int64_t value) {
VIXL_ASSERT(value > 1);
steps_ = value;
}
bool IsDebuggerRunning() const {
return (debug_parameters_ & DBG_ACTIVE) != 0;
}
bool pending_request() const { return pending_request_; }
void update_pending_request() {
pending_request_ = IsDebuggerRunning();
}
void PrintInstructions(const void* address, int64_t count = 1);
void PrintMemory(const uint8_t* address,
const FormatToken* format,
int64_t count = 1);
void PrintRegister(const Register& target_reg,
const char* name,
const FormatToken* format);
void PrintFPRegister(const FPRegister& target_fpreg,
const FormatToken* format);
private:
char* ReadCommandLine(const char* prompt, char* buffer, int length);
void RunDebuggerShell();
void DoBreakpoint(const Instruction* instr);
int debug_parameters_;
bool pending_request_;
int64_t steps_;
DebugCommand* last_command_;
PrintDisassembler* disasm_;
Decoder* printer_;
// Length of the biggest command line accepted by the debugger shell.
static const int kMaxDebugShellLine = 256;
};
} // namespace vixl
#endif // VIXL_A64_DEBUGGER_A64_H_
#endif // JS_SIMULATOR_ARM64
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