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// license:BSD-3-Clause
// copyright-holders:Aaron Giles
/*********************************************************************
debugcpu.h
Debugger CPU/memory interface engine.
***************************************************************************/
#ifndef MAME_EMU_DEBUG_DEBUGCPU_H
#define MAME_EMU_DEBUG_DEBUGCPU_H
#pragma once
#include "express.h"
#include <set>
//**************************************************************************
// CONSTANTS
//**************************************************************************
constexpr int COMMENT_VERSION = 1;
//**************************************************************************
// TYPE DEFINITIONS
//**************************************************************************
typedef int (*debug_instruction_hook_func)(device_t &device, offs_t curpc);
// ======================> device_debug
// [TODO] This whole thing is terrible.
class device_debug
{
public:
// breakpoint class
class breakpoint
{
friend class device_debug;
public:
// construction/destruction
breakpoint(
device_debug* debugInterface,
symbol_table &symbols,
int index,
offs_t address,
const char *condition = nullptr,
const char *action = nullptr);
// getters
const device_debug *debugInterface() const { return m_debugInterface; }
breakpoint *next() const { return m_next; }
int index() const { return m_index; }
bool enabled() const { return m_enabled; }
offs_t address() const { return m_address; }
const char *condition() const { return m_condition.original_string(); }
const char *action() const { return m_action.c_str(); }
// setters
void setEnabled(bool value) { m_enabled = value; }
private:
// internals
bool hit(offs_t pc);
const device_debug * m_debugInterface; // the interface we were created from
breakpoint * m_next; // next in the list
int m_index; // user reported index
bool m_enabled; // enabled?
offs_t m_address; // execution address
parsed_expression m_condition; // condition
std::string m_action; // action
};
// watchpoint class
class watchpoint
{
friend class device_debug;
public:
// construction/destruction
watchpoint(
device_debug* debugInterface,
symbol_table &symbols,
int index,
address_space &space,
read_or_write type,
offs_t address,
offs_t length,
const char *condition = nullptr,
const char *action = nullptr);
~watchpoint();
// getters
const device_debug *debugInterface() const { return m_debugInterface; }
address_space &space() const { return m_space; }
int index() const { return m_index; }
read_or_write type() const { return m_type; }
bool enabled() const { return m_enabled; }
offs_t address() const { return m_address; }
offs_t length() const { return m_length; }
const char *condition() const { return m_condition.original_string(); }
const std::string &action() const { return m_action; }
// setters
void setEnabled(bool value);
// internals
bool hit(int type, offs_t address, int size);
private:
device_debug * m_debugInterface; // the interface we were created from
memory_passthrough_handler *m_phr; // passthrough handler reference, read access
memory_passthrough_handler *m_phw; // passthrough handler reference, write access
address_space & m_space; // address space
int m_index; // user reported index
bool m_enabled; // enabled?
read_or_write m_type; // type (read/write)
offs_t m_address; // start address
offs_t m_length; // length of watch area
parsed_expression m_condition; // condition
std::string m_action; // action
int m_notifier; // address map change notifier id
offs_t m_start_address[3]; // the start addresses of the checks to install
offs_t m_end_address[3]; // the end addresses
u64 m_masks[3]; // the access masks
void install(read_or_write mode);
void triggered(read_or_write type, offs_t address, u64 data, u64 mem_mask);
};
// registerpoint class
class registerpoint
{
friend class device_debug;
public:
// construction/destruction
registerpoint(symbol_table &symbols, int index, const char *condition, const char *action = nullptr);
// getters
registerpoint *next() const { return m_next; }
int index() const { return m_index; }
bool enabled() const { return m_enabled; }
const char *condition() const { return m_condition.original_string(); }
const char *action() const { return m_action.c_str(); }
private:
// internals
bool hit();
registerpoint * m_next; // next in the list
int m_index; // user reported index
bool m_enabled; // enabled?
parsed_expression m_condition; // condition
std::string m_action; // action
};
public:
// construction/destruction
device_debug(device_t &device);
~device_debug();
// getters
symbol_table &symtable() { return m_symtable; }
// commonly-used pass-throughs
int logaddrchars() const { return (m_memory != nullptr && m_memory->has_space(AS_PROGRAM)) ? m_memory->space(AS_PROGRAM).logaddrchars() : 8; }
bool is_octal() const { return (m_memory != nullptr && m_memory->has_space(AS_PROGRAM)) ? m_memory->space(AS_PROGRAM).is_octal() : false; }
device_t& device() const { return m_device; }
// hooks used by the rest of the system
void start_hook(const attotime &endtime);
void stop_hook();
void interrupt_hook(int irqline);
void exception_hook(int exception);
void instruction_hook(offs_t curpc);
// hooks into our operations
void set_instruction_hook(debug_instruction_hook_func hook);
// debugger focus
void ignore(bool ignore = true);
bool observing() const { return ((m_flags & DEBUG_FLAG_OBSERVING) != 0); }
// debugger suspend/unsuspend
void suspend(bool suspend = true);
bool suspended() const { return ((m_flags & DEBUG_FLAG_SUSPENDED) != 0); }
// single stepping
void single_step(int numsteps = 1);
void single_step_over(int numsteps = 1);
void single_step_out();
// execution
void go(offs_t targetpc = ~0);
void go_vblank();
void go_interrupt(int irqline = -1);
void go_exception(int exception);
void go_milliseconds(u64 milliseconds);
void go_next_device();
template <typename Format, typename... Params>
void halt_on_next_instruction(Format &&fmt, Params &&... args)
{
halt_on_next_instruction_impl(util::make_format_argument_pack(std::forward<Format>(fmt), std::forward<Params>(args)...));
}
// breakpoints
breakpoint *breakpoint_first() const { return m_bplist; }
int breakpoint_set(offs_t address, const char *condition = nullptr, const char *action = nullptr);
bool breakpoint_clear(int index);
void breakpoint_clear_all();
bool breakpoint_enable(int index, bool enable = true);
void breakpoint_enable_all(bool enable = true);
// watchpoints
int watchpoint_space_count() const { return m_wplist.size(); }
const std::vector<std::unique_ptr<watchpoint>> &watchpoint_vector(int spacenum) const { return m_wplist[spacenum]; }
int watchpoint_set(address_space &space, read_or_write type, offs_t address, offs_t length, const char *condition, const char *action);
bool watchpoint_clear(int wpnum);
void watchpoint_clear_all();
bool watchpoint_enable(int index, bool enable = true);
void watchpoint_enable_all(bool enable = true);
// registerpoints
registerpoint *registerpoint_first() const { return m_rplist; }
int registerpoint_set(const char *condition, const char *action = nullptr);
bool registerpoint_clear(int index);
void registerpoint_clear_all();
bool registerpoint_enable(int index, bool enable = true);
void registerpoint_enable_all(bool enable = true );
// hotspots
bool hotspot_tracking_enabled() const { return !m_hotspots.empty(); }
void hotspot_track(int numspots, int threshhold);
// comments
void comment_add(offs_t address, const char *comment, rgb_t color);
bool comment_remove(offs_t addr);
const char *comment_text(offs_t addr) const;
u32 comment_count() const { return m_comment_set.size(); }
u32 comment_change_count() const { return m_comment_change; }
bool comment_export(util::xml::data_node &node);
bool comment_import(util::xml::data_node const &node, bool is_inline);
u32 compute_opcode_crc32(offs_t pc) const;
// history
offs_t history_pc(int index) const;
// pc tracking
void set_track_pc(bool value) { m_track_pc = value; }
bool track_pc_visited(const offs_t& pc) const;
void set_track_pc_visited(const offs_t& pc);
void track_pc_data_clear() { m_track_pc_set.clear(); }
// memory tracking
void set_track_mem(bool value) { m_track_mem = value; }
offs_t track_mem_pc_from_space_address_data(const int& space,
const offs_t& address,
const u64& data) const;
void track_mem_data_clear() { m_track_mem_set.clear(); }
// tracing
void trace(FILE *file, bool trace_over, bool detect_loops, bool logerror, const char *action);
void trace_printf(const char *fmt, ...) ATTR_PRINTF(2,3);
void trace_flush() { if (m_trace != nullptr) m_trace->flush(); }
void reset_transient_flag() { m_flags &= ~DEBUG_FLAG_TRANSIENT; }
static const int HISTORY_SIZE = 256;
// debugger_cpu helpers
void compute_debug_flags();
private:
void halt_on_next_instruction_impl(util::format_argument_pack<std::ostream> &&args);
// internal helpers
void prepare_for_step_overout(offs_t pc);
void errorlog_write_line(const char *line);
// breakpoint and watchpoint helpers
void breakpoint_update_flags();
void breakpoint_check(offs_t pc);
void hotspot_check(address_space &space, offs_t address);
void reinstall_all(read_or_write mode);
void reinstall(address_space &space, read_or_write mode);
void write_tracking(address_space &space, offs_t address, u64 data);
// symbol get/set callbacks
static u64 get_current_pc(symbol_table &table);
static u64 get_cycles(symbol_table &table);
static u64 get_totalcycles(symbol_table &table);
static u64 get_lastinstructioncycles(symbol_table &table);
static u64 get_state(symbol_table &table, int index);
static void set_state(symbol_table &table, int index, u64 value);
// basic device information
device_t & m_device; // device we are attached to
device_execute_interface * m_exec; // execute interface, if present
device_memory_interface * m_memory; // memory interface, if present
device_state_interface * m_state; // state interface, if present
device_disasm_interface * m_disasm; // disasm interface, if present
// global state
u32 m_flags; // debugging flags for this CPU
symbol_table m_symtable; // symbol table for expression evaluation
debug_instruction_hook_func m_instrhook; // per-instruction callback hook
// stepping information
offs_t m_stepaddr; // step target address for DEBUG_FLAG_STEPPING_OVER
int m_stepsleft; // number of steps left until done
// execution information
offs_t m_stopaddr; // stop address for DEBUG_FLAG_STOP_PC
attotime m_stoptime; // stop time for DEBUG_FLAG_STOP_TIME
int m_stopirq; // stop IRQ number for DEBUG_FLAG_STOP_INTERRUPT
int m_stopexception; // stop exception number for DEBUG_FLAG_STOP_EXCEPTION
attotime m_endexectime; // ending time of the current execution
u64 m_total_cycles; // current total cycles
u64 m_last_total_cycles; // last total cycles
// history
offs_t m_pc_history[HISTORY_SIZE]; // history of recent PCs
u32 m_pc_history_index; // current history index
// breakpoints and watchpoints
breakpoint * m_bplist; // list of breakpoints
std::vector<std::vector<std::unique_ptr<watchpoint>>> m_wplist; // watchpoint lists for each address space
registerpoint * m_rplist; // list of registerpoints
// tracing
class tracer
{
public:
tracer(device_debug &debug, FILE &file, bool trace_over, bool detect_loops, bool logerror, const char *action);
~tracer();
void update(offs_t pc);
void vprintf(const char *format, va_list va);
void flush();
bool logerror() const { return m_logerror; }
private:
static const int TRACE_LOOPS = 64;
device_debug & m_debug; // reference to our owner
FILE & m_file; // tracing file for this CPU
std::string m_action; // action to perform during a trace
offs_t m_history[TRACE_LOOPS]; // history of recent PCs
bool m_detect_loops; // whether or not we should detect loops
bool m_logerror; // whether or not we should collect logerror output
int m_loops; // number of instructions in a loop
int m_nextdex; // next index
bool m_trace_over; // true if we're tracing over
offs_t m_trace_over_target; // target for tracing over
// (0 = not tracing over,
// ~0 = not currently tracing over)
};
std::unique_ptr<tracer> m_trace; // tracer state
// hotspots
struct hotspot_entry
{
offs_t m_access; // access address
offs_t m_pc; // PC of the access
address_space * m_space; // space where the access occurred
u32 m_count; // number of hits
};
std::vector<hotspot_entry> m_hotspots; // hotspot list
int m_hotspot_threshhold; // threshhold for the number of hits to print
std::vector<memory_passthrough_handler *> m_phr; // passthrough handler reference for each space, read mode
std::vector<memory_passthrough_handler *> m_phw; // passthrough handler reference for each space, write mode
std::vector<int> m_notifiers; // notifiers for each space
// pc tracking
class dasm_pc_tag
{
public:
dasm_pc_tag(const offs_t& address, const u32& crc);
// required to be included in a set
bool operator < (const dasm_pc_tag& rhs) const
{
if (m_address == rhs.m_address)
return m_crc < rhs.m_crc;
return (m_address < rhs.m_address);
}
offs_t m_address; // Stores [nothing] for a given address & crc32
u32 m_crc;
};
std::set<dasm_pc_tag> m_track_pc_set;
bool m_track_pc;
// comments
class dasm_comment : public dasm_pc_tag
{
public:
dasm_comment(offs_t address, u32 crc, const char *text, rgb_t color);
std::string m_text; // Stores comment text & color for a given address & crc32
rgb_t m_color;
};
std::set<dasm_comment> m_comment_set; // collection of comments
u32 m_comment_change; // change counter for comments
// memory tracking
class dasm_memory_access
{
public:
dasm_memory_access(const int& address_space,
const offs_t& address,
const u64& data,
const offs_t& pc);
// required to be included in a set
bool operator < (const dasm_memory_access& rhs) const
{
if ((m_address == rhs.m_address) && (m_address_space == rhs.m_address_space))
return m_data < rhs.m_data;
else if (m_address_space == rhs.m_address_space)
return m_address < rhs.m_address;
else
return m_address_space < rhs.m_address_space;
}
// Stores the PC for a given address, memory region, and data value
int m_address_space;
offs_t m_address;
u64 m_data;
mutable offs_t m_pc;
};
std::set<dasm_memory_access> m_track_mem_set;
bool m_track_mem;
// internal flag values
static constexpr u32 DEBUG_FLAG_OBSERVING = 0x00000001; // observing this CPU
static constexpr u32 DEBUG_FLAG_HISTORY = 0x00000002; // tracking this CPU's history
static constexpr u32 DEBUG_FLAG_TRACING = 0x00000004; // tracing this CPU
static constexpr u32 DEBUG_FLAG_TRACING_OVER = 0x00000008; // tracing this CPU with step over behavior
static constexpr u32 DEBUG_FLAG_HOOKED = 0x00000010; // per-instruction callback hook
static constexpr u32 DEBUG_FLAG_STEPPING = 0x00000020; // CPU is single stepping
static constexpr u32 DEBUG_FLAG_STEPPING_OVER = 0x00000040; // CPU is stepping over a function
static constexpr u32 DEBUG_FLAG_STEPPING_OUT = 0x00000080; // CPU is stepping out of a function
static constexpr u32 DEBUG_FLAG_STOP_PC = 0x00000100; // there is a pending stop at cpu->breakpc
static constexpr u32 DEBUG_FLAG_STOP_INTERRUPT = 0x00000400; // there is a pending stop on the next interrupt
static constexpr u32 DEBUG_FLAG_STOP_EXCEPTION = 0x00000800; // there is a pending stop on the next exception
static constexpr u32 DEBUG_FLAG_STOP_VBLANK = 0x00001000; // there is a pending stop on the next VBLANK
static constexpr u32 DEBUG_FLAG_STOP_TIME = 0x00002000; // there is a pending stop at cpu->stoptime
static constexpr u32 DEBUG_FLAG_SUSPENDED = 0x00004000; // CPU currently suspended
static constexpr u32 DEBUG_FLAG_LIVE_BP = 0x00010000; // there are live breakpoints for this CPU
static constexpr u32 DEBUG_FLAG_STEPPING_ANY = DEBUG_FLAG_STEPPING | DEBUG_FLAG_STEPPING_OVER | DEBUG_FLAG_STEPPING_OUT;
static constexpr u32 DEBUG_FLAG_TRACING_ANY = DEBUG_FLAG_TRACING | DEBUG_FLAG_TRACING_OVER;
static constexpr u32 DEBUG_FLAG_TRANSIENT = DEBUG_FLAG_STEPPING_ANY | DEBUG_FLAG_STOP_PC |
DEBUG_FLAG_STOP_INTERRUPT | DEBUG_FLAG_STOP_EXCEPTION | DEBUG_FLAG_STOP_VBLANK | DEBUG_FLAG_STOP_TIME;
};
//**************************************************************************
// CPU DEBUGGING
//**************************************************************************
class debugger_cpu
{
public:
enum class exec_state { STOPPED, RUNNING };
debugger_cpu(running_machine &machine);
/* ----- initialization and cleanup ----- */
/* flushes all traces; this is useful if a trace is going on when we fatalerror */
void flush_traces();
void configure_memory(symbol_table &table);
/* ----- debugging status & information ----- */
/* return the visible CPU device (the one that commands should apply to) */
device_t *get_visible_cpu() { return m_visiblecpu; }
/* return true if the current execution state is stopped */
bool is_stopped() const { return m_execution_state == exec_state::STOPPED; }
bool is_running() const { return m_execution_state == exec_state::RUNNING; }
/* ----- symbol table interfaces ----- */
/* return the global symbol table */
symbol_table *get_global_symtable() { return m_symtable.get(); }
/* return the locally-visible symbol table */
symbol_table *get_visible_symtable();
/* ----- misc debugger functions ----- */
/* specifies a debug command script to execute */
void source_script(const char *file);
/* ----- debugger comment helpers ----- */
// save all comments for a given machine
bool comment_save();
// load all comments for a given machine
bool comment_load(bool is_inline);
/* ----- debugger memory accessors ----- */
/* return a byte from the specified memory space */
u8 read_byte(address_space &space, offs_t address, bool apply_translation);
/* return a word from the specified memory space */
u16 read_word(address_space &space, offs_t address, bool apply_translation);
/* return a dword from the specified memory space */
u32 read_dword(address_space &space, offs_t address, bool apply_translation);
/* return a qword from the specified memory space */
u64 read_qword(address_space &space, offs_t address, bool apply_translation);
/* return 1,2,4 or 8 bytes from the specified memory space */
u64 read_memory(address_space &space, offs_t address, int size, bool apply_translation);
/* write a byte to the specified memory space */
void write_byte(address_space &space, offs_t address, u8 data, bool apply_translation);
/* write a word to the specified memory space */
void write_word(address_space &space, offs_t address, u16 data, bool apply_translation);
/* write a dword to the specified memory space */
void write_dword(address_space &space, offs_t address, u32 data, bool apply_translation);
/* write a qword to the specified memory space */
void write_qword(address_space &space, offs_t address, u64 data, bool apply_translation);
/* write 1,2,4 or 8 bytes to the specified memory space */
void write_memory(address_space &space, offs_t address, u64 data, int size, bool apply_translation);
/* read 1,2,4 or 8 bytes at the given offset from opcode space */
u64 read_opcode(address_space &space, offs_t offset, int size);
// getters
bool within_instruction_hook() const { return m_within_instruction_hook; }
bool memory_modified() const { return m_memory_modified; }
exec_state execution_state() const { return m_execution_state; }
device_t *live_cpu() { return m_livecpu; }
u32 get_breakpoint_index() { return m_bpindex++; }
u32 get_watchpoint_index() { return m_wpindex++; }
u32 get_registerpoint_index() { return m_rpindex++; }
// setters
void set_visible_cpu(device_t * visiblecpu) { m_visiblecpu = visiblecpu; }
void set_break_cpu(device_t * breakcpu) { m_breakcpu = breakcpu; }
void set_within_instruction(bool within_instruction) { m_within_instruction_hook = within_instruction; }
void set_memory_modified(bool memory_modified) { m_memory_modified = memory_modified; }
void set_execution_stopped() { m_execution_state = exec_state::STOPPED; }
void set_execution_running() { m_execution_state = exec_state::RUNNING; }
void set_wpinfo(offs_t address, u64 data) { m_wpaddr = address; m_wpdata = data; }
// device_debug helpers
// [TODO] [RH]: Look into this more later, can possibly merge these two classes
void start_hook(device_t *device, bool stop_on_vblank);
void stop_hook(device_t *device);
void go_next_device(device_t *device);
void go_vblank();
void halt_on_next_instruction(device_t *device, util::format_argument_pack<std::ostream> &&args);
void ensure_comments_loaded();
void reset_transient_flags();
void process_source_file();
private:
static const size_t NUM_TEMP_VARIABLES;
/* expression handlers */
u64 expression_read_memory(void *param, const char *name, expression_space space, u32 address, int size, bool disable_se);
u64 expression_read_program_direct(address_space &space, int opcode, offs_t address, int size);
u64 expression_read_memory_region(const char *rgntag, offs_t address, int size);
void expression_write_memory(void *param, const char *name, expression_space space, u32 address, int size, u64 data, bool disable_se);
void expression_write_program_direct(address_space &space, int opcode, offs_t address, int size, u64 data);
void expression_write_memory_region(const char *rgntag, offs_t address, int size, u64 data);
expression_error::error_code expression_validate(void *param, const char *name, expression_space space);
device_t* expression_get_device(const char *tag);
/* variable getters/setters */
u64 get_cpunum(symbol_table &table);
u64 get_beamx(symbol_table &table, screen_device *screen);
u64 get_beamy(symbol_table &table, screen_device *screen);
u64 get_frame(symbol_table &table, screen_device *screen);
/* internal helpers */
void on_vblank(screen_device &device, bool vblank_state);
running_machine& m_machine;
device_t * m_livecpu;
device_t * m_visiblecpu;
device_t * m_breakcpu;
std::unique_ptr<std::istream> m_source_file; // script source file
std::unique_ptr<symbol_table> m_symtable; // global symbol table
bool m_within_instruction_hook;
bool m_vblank_occurred;
bool m_memory_modified;
exec_state m_execution_state;
device_t * m_stop_when_not_device; // stop execution when the device ceases to be this
u32 m_bpindex;
u32 m_wpindex;
u32 m_rpindex;
u64 m_wpdata;
u64 m_wpaddr;
std::unique_ptr<u64[]> m_tempvar;
osd_ticks_t m_last_periodic_update_time;
bool m_comments_loaded;
};
#endif // MAME_EMU_DEBUG_DEBUGCPU_H
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