Improved debugger command style and usability, made code more flexible
This commit is contained in:
Lior Halphon
parent
3e135a7c00
commit
eb0b642247
254
Core/debugger.c
254
Core/debugger.c
@ -315,6 +315,177 @@ unsigned short debugger_evaluate(GB_gameboy_t *gb, const char *string, unsigned
|
||||
return literal;
|
||||
}
|
||||
|
||||
typedef bool debugger_command_imp_t(GB_gameboy_t *gb, char *arguments);
|
||||
|
||||
typedef struct {
|
||||
const char *command;
|
||||
unsigned char min_length;
|
||||
debugger_command_imp_t *implementation;
|
||||
const char *help_string; // Null if should not appear in help
|
||||
} debugger_command_t;
|
||||
|
||||
static const char *lstrip(const char *str)
|
||||
{
|
||||
while (*str == ' ' || *str == '\t') {
|
||||
str++;
|
||||
}
|
||||
return str;
|
||||
}
|
||||
|
||||
static bool cont(GB_gameboy_t *gb, char *arguments)
|
||||
{
|
||||
if (strlen(lstrip(arguments))) {
|
||||
gb_log(gb, "Usage: continue\n");
|
||||
return true;
|
||||
}
|
||||
gb->debug_stopped = false;
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool next(GB_gameboy_t *gb, char *arguments)
|
||||
{
|
||||
if (strlen(lstrip(arguments))) {
|
||||
gb_log(gb, "Usage: next\n");
|
||||
return true;
|
||||
}
|
||||
|
||||
gb->debug_stopped = false;
|
||||
gb->debug_next_command = true;
|
||||
gb->debug_call_depth = 0;
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool step(GB_gameboy_t *gb, char *arguments)
|
||||
{
|
||||
if (strlen(lstrip(arguments))) {
|
||||
gb_log(gb, "Usage: step\n");
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool finish(GB_gameboy_t *gb, char *arguments)
|
||||
{
|
||||
if (strlen(lstrip(arguments))) {
|
||||
gb_log(gb, "Usage: finish\n");
|
||||
return true;
|
||||
}
|
||||
|
||||
gb->debug_stopped = false;
|
||||
gb->debug_fin_command = true;
|
||||
gb->debug_call_depth = 0;
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool registers(GB_gameboy_t *gb, char *arguments)
|
||||
{
|
||||
if (strlen(lstrip(arguments))) {
|
||||
gb_log(gb, "Usage: registers\n");
|
||||
return true;
|
||||
}
|
||||
|
||||
gb_log(gb, "AF = %04x\n", gb->registers[GB_REGISTER_AF]);
|
||||
gb_log(gb, "BC = %04x\n", gb->registers[GB_REGISTER_BC]);
|
||||
gb_log(gb, "DE = %04x\n", gb->registers[GB_REGISTER_DE]);
|
||||
gb_log(gb, "HL = %04x\n", gb->registers[GB_REGISTER_HL]);
|
||||
gb_log(gb, "SP = %04x\n", gb->registers[GB_REGISTER_SP]);
|
||||
gb_log(gb, "PC = %04x\n", gb->pc);
|
||||
gb_log(gb, "TIMA = %d/%lu\n", gb->io_registers[GB_IO_TIMA], gb->tima_cycles);
|
||||
gb_log(gb, "Display Controller: LY = %d/%lu\n", gb->io_registers[GB_IO_LY], gb->display_cycles % 456);
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool breakpoint(GB_gameboy_t *gb, char *arguments)
|
||||
{
|
||||
if (strlen(lstrip(arguments)) == 0) {
|
||||
gb_log(gb, "Usage: breakpoint <expression>\n");
|
||||
return true;
|
||||
}
|
||||
|
||||
bool error;
|
||||
unsigned short result = debugger_evaluate(gb, arguments, (unsigned int)strlen(arguments), &error);
|
||||
if (!error) {
|
||||
gb_log(gb, "Breakpoint moved to %04x\n", gb->breakpoint = result);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool print(GB_gameboy_t *gb, char *arguments)
|
||||
{
|
||||
if (strlen(lstrip(arguments)) == 0) {
|
||||
gb_log(gb, "Usage: print <expression>\n");
|
||||
return true;
|
||||
}
|
||||
|
||||
bool error;
|
||||
unsigned short result = debugger_evaluate(gb, arguments, (unsigned int)strlen(arguments), &error);
|
||||
if (!error) {
|
||||
gb_log(gb, "=%04x\n", result);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool examine(GB_gameboy_t *gb, char *arguments)
|
||||
{
|
||||
if (strlen(lstrip(arguments)) == 0) {
|
||||
gb_log(gb, "Usage: examine <expression>\n");
|
||||
return true;
|
||||
}
|
||||
|
||||
bool error;
|
||||
unsigned short addr = debugger_evaluate(gb, arguments, (unsigned int)strlen(arguments), &error);
|
||||
if (!error) {
|
||||
gb_log(gb, "%4x: ", addr);
|
||||
for (int i = 0; i < 16; i++) {
|
||||
gb_log(gb, "%02x ", read_memory(gb, addr + i));
|
||||
}
|
||||
gb_log(gb, "\n");
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static bool help(GB_gameboy_t *gb, char *arguments);
|
||||
static const debugger_command_t commands[] = {
|
||||
{"continue", 1, cont, "Continue running until next stop"},
|
||||
{"next", 1, next, "Run the next instruction, skipping over function calls"},
|
||||
{"step", 1, step, "Run the next instruction, stepping into function calls"},
|
||||
{"finish", 1, finish, "Run until the current function returns"},
|
||||
{"registers", 1, registers, "Print values of processor registers and other important registers"},
|
||||
{"breakpoint", 1, breakpoint, "Move the breakpoint to a new position"},
|
||||
{"print", 1, print, "Evaluate and print an expression"},
|
||||
{"eval", 2, print, NULL},
|
||||
{"examine", 2, examine, "Examine values at address"},
|
||||
{"x", 1, examine, NULL},
|
||||
{"help", 1, help, "List available commands"},
|
||||
};
|
||||
|
||||
static bool help(GB_gameboy_t *gb, char *arguments)
|
||||
{
|
||||
/* Todo: command specific help */
|
||||
const debugger_command_t *command = commands;
|
||||
for (size_t i = sizeof(commands) / sizeof(*command); i--; command++) {
|
||||
if (command->help_string) {
|
||||
gb_attributed_log(gb, GB_LOG_BOLD, "%s", command->command);
|
||||
gb_log(gb, ": %s\n", command->help_string);
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
static const debugger_command_t *find_command(const char *string)
|
||||
{
|
||||
const debugger_command_t *command = commands;
|
||||
size_t length = strlen(string);
|
||||
for (size_t i = sizeof(commands) / sizeof(*command); i--; command++) {
|
||||
if (command->min_length > length) continue;
|
||||
if (memcmp(command->command, string, length) == 0) { /* Is a substring? */
|
||||
return command;
|
||||
}
|
||||
}
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* The debugger interface is quite primitive. One letter commands with a single parameter maximum.
|
||||
Only one breakpoint is allowed at a time. More features will be added later. */
|
||||
@ -343,68 +514,31 @@ next_command:
|
||||
gb->debug_next_command = false;
|
||||
gb->debug_fin_command = false;
|
||||
input = gb->input_callback(gb);
|
||||
switch (*input) {
|
||||
case 'c':
|
||||
gb->debug_stopped = false;
|
||||
break;
|
||||
case 'n':
|
||||
gb->debug_stopped = false;
|
||||
gb->debug_next_command = true;
|
||||
gb->debug_call_depth = 0;
|
||||
break;
|
||||
case 'f':
|
||||
gb->debug_stopped = false;
|
||||
gb->debug_fin_command = true;
|
||||
gb->debug_call_depth = 0;
|
||||
break;
|
||||
case 's':
|
||||
break;
|
||||
case 'r':
|
||||
gb_log(gb, "AF = %04x\n", gb->registers[GB_REGISTER_AF]);
|
||||
gb_log(gb, "BC = %04x\n", gb->registers[GB_REGISTER_BC]);
|
||||
gb_log(gb, "DE = %04x\n", gb->registers[GB_REGISTER_DE]);
|
||||
gb_log(gb, "HL = %04x\n", gb->registers[GB_REGISTER_HL]);
|
||||
gb_log(gb, "SP = %04x\n", gb->registers[GB_REGISTER_SP]);
|
||||
gb_log(gb, "PC = %04x\n", gb->pc);
|
||||
gb_log(gb, "TIMA = %d/%lu\n", gb->io_registers[GB_IO_TIMA], gb->tima_cycles);
|
||||
gb_log(gb, "Display Controller: LY = %d/%lu\n", gb->io_registers[GB_IO_LY], gb->display_cycles % 456);
|
||||
goto next_command;
|
||||
case 'x':
|
||||
{
|
||||
bool error;
|
||||
unsigned short addr = debugger_evaluate(gb, input + 1, (unsigned int)strlen(input + 1), &error);
|
||||
if (!error) {
|
||||
gb_log(gb, "%4x: ", addr);
|
||||
for (int i = 0; i < 16; i++) {
|
||||
gb_log(gb, "%02x ", read_memory(gb, addr + i));
|
||||
}
|
||||
gb_log(gb, "\n");
|
||||
}
|
||||
goto next_command;
|
||||
}
|
||||
case 'b':
|
||||
{
|
||||
bool error;
|
||||
unsigned short result = debugger_evaluate(gb, input + 1, (unsigned int)strlen(input + 1), &error);
|
||||
if (!error) {
|
||||
gb_log(gb, "Breakpoint moved to %04x\n", gb->breakpoint = result);
|
||||
}
|
||||
goto next_command;
|
||||
}
|
||||
|
||||
case 'p':
|
||||
{
|
||||
bool error;
|
||||
unsigned short result = debugger_evaluate(gb, input + 1, (unsigned int)strlen(input + 1), &error);
|
||||
if (!error) {
|
||||
gb_log(gb, "=%04x\n", result);
|
||||
}
|
||||
goto next_command;
|
||||
}
|
||||
|
||||
default:
|
||||
goto next_command;
|
||||
char *command_string = input;
|
||||
char *arguments = strchr(input, ' ');
|
||||
if (arguments) {
|
||||
/* Actually "split" the string. */
|
||||
arguments[0] = 0;
|
||||
arguments++;
|
||||
}
|
||||
else {
|
||||
arguments = "";
|
||||
}
|
||||
|
||||
const debugger_command_t *command = find_command(command_string);
|
||||
if (command) {
|
||||
if (command->implementation(gb, arguments)) {
|
||||
goto next_command;
|
||||
}
|
||||
}
|
||||
else {
|
||||
gb_log(gb, "%s: no such command.\n", command_string);
|
||||
goto next_command;
|
||||
}
|
||||
|
||||
/* Split to arguments and command */
|
||||
|
||||
free(input);
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user