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phpdbg_prompt.c
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/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| https://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Felipe Pena <[email protected]> |
| Authors: Joe Watkins <[email protected]> |
| Authors: Bob Weinand <[email protected]> |
+----------------------------------------------------------------------+
*/
#include <stdio.h>
#include <string.h>
#include "zend.h"
#include "zend_compile.h"
#include "zend_exceptions.h"
#include "zend_vm.h"
#include "zend_generators.h"
#include "zend_interfaces.h"
#include "zend_smart_str.h"
#include "phpdbg.h"
#include "phpdbg_io.h"
#include "phpdbg_help.h"
#include "phpdbg_print.h"
#include "phpdbg_info.h"
#include "phpdbg_break.h"
#include "phpdbg_list.h"
#include "phpdbg_utils.h"
#include "phpdbg_prompt.h"
#include "phpdbg_cmd.h"
#include "phpdbg_set.h"
#include "phpdbg_frame.h"
#include "phpdbg_lexer.h"
#include "phpdbg_parser.h"
#if ZEND_VM_KIND != ZEND_VM_KIND_CALL && ZEND_VM_KIND != ZEND_VM_KIND_HYBRID
#error "phpdbg can only be built with CALL zend vm kind"
#endif
ZEND_EXTERN_MODULE_GLOBALS(phpdbg)
extern int phpdbg_startup_run;
#ifdef HAVE_LIBDL
#ifdef PHP_WIN32
#include "win32/param.h"
#include "win32/winutil.h"
#define GET_DL_ERROR() php_win_err()
#else
#include <sys/param.h>
#define GET_DL_ERROR() DL_ERROR()
#endif
#endif
/* {{{ command declarations */
const phpdbg_command_t phpdbg_prompt_commands[] = {
PHPDBG_COMMAND_D(exec, "set execution context", 'e', NULL, "s", 0),
PHPDBG_COMMAND_D(stdin, "read script from stdin", 0 , NULL, "s", 0),
PHPDBG_COMMAND_D(step, "step through execution", 's', NULL, 0, PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(continue, "continue execution", 'c', NULL, 0, PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(run, "attempt execution", 'r', NULL, "|s", 0),
PHPDBG_COMMAND_D(ev, "evaluate some code", 0 , NULL, "i", PHPDBG_ASYNC_SAFE), /* restricted ASYNC_SAFE */
PHPDBG_COMMAND_D(until, "continue past the current line", 'u', NULL, 0, 0),
PHPDBG_COMMAND_D(finish, "continue past the end of the stack", 'F', NULL, 0, 0),
PHPDBG_COMMAND_D(leave, "continue until the end of the stack", 'L', NULL, 0, 0),
PHPDBG_COMMAND_D(generator, "inspect or switch to a generator", 'g', NULL, "|n", 0),
PHPDBG_COMMAND_D(print, "print something", 'p', phpdbg_print_commands, "|*c", 0),
PHPDBG_COMMAND_D(break, "set breakpoint", 'b', phpdbg_break_commands, "|*c", 0),
PHPDBG_COMMAND_D(back, "show trace", 't', NULL, "|n", PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(frame, "switch to a frame", 'f', NULL, "|n", PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(list, "lists some code", 'l', phpdbg_list_commands, "*", PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(info, "displays some information", 'i', phpdbg_info_commands, "|s", PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(clean, "clean the execution environment", 'X', NULL, 0, 0),
PHPDBG_COMMAND_D(clear, "clear breakpoints", 'C', NULL, 0, 0),
PHPDBG_COMMAND_D(help, "show help menu", 'h', phpdbg_help_commands, "|s", PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(set, "set phpdbg configuration", 'S', phpdbg_set_commands, "s", PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(register, "register a phpdbginit function as a command alias", 'R', NULL, "s", 0),
PHPDBG_COMMAND_D(source, "execute a phpdbginit", '<', NULL, "s", 0),
PHPDBG_COMMAND_D(export, "export breaks to a .phpdbginit script", '>', NULL, "s", PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(sh, "shell a command", 0 , NULL, "i", 0),
PHPDBG_COMMAND_D(quit, "exit phpdbg", 'q', NULL, 0, PHPDBG_ASYNC_SAFE),
PHPDBG_COMMAND_D(watch, "set watchpoint", 'w', phpdbg_watch_commands, "|ss", 0),
PHPDBG_COMMAND_D(next, "step over next line", 'n', NULL, 0, PHPDBG_ASYNC_SAFE),
PHPDBG_END_COMMAND
}; /* }}} */
static inline int phpdbg_call_register(phpdbg_param_t *stack) /* {{{ */
{
phpdbg_param_t *name = NULL;
if (stack->type == STACK_PARAM) {
name = stack->next;
if (!name || name->type != STR_PARAM) {
return FAILURE;
}
zend_function *user_fn = zend_hash_str_find_ptr_lc(&PHPDBG_G(registered), name->str, name->len);
if (user_fn != NULL) {
HashTable *params_ht = NULL;
if (name->next) {
phpdbg_param_t *next = name->next;
zval params;
array_init(¶ms);
while (next) {
char *buffered = NULL;
switch (next->type) {
case OP_PARAM:
case COND_PARAM:
case STR_PARAM:
add_next_index_stringl(¶ms, next->str, next->len);
break;
case NUMERIC_PARAM:
add_next_index_long(¶ms, next->num);
break;
case METHOD_PARAM:
spprintf(&buffered, 0, "%s::%s", next->method.class, next->method.name);
add_next_index_string(¶ms, buffered);
break;
case NUMERIC_METHOD_PARAM:
spprintf(&buffered, 0, "%s::%s#"ZEND_LONG_FMT, next->method.class, next->method.name, next->num);
add_next_index_string(¶ms, buffered);
break;
case NUMERIC_FUNCTION_PARAM:
spprintf(&buffered, 0, "%s#"ZEND_LONG_FMT, next->str, next->num);
add_next_index_string(¶ms, buffered);
break;
case FILE_PARAM:
spprintf(&buffered, 0, "%s:"ZEND_ULONG_FMT, next->file.name, next->file.line);
add_next_index_string(¶ms, buffered);
break;
case NUMERIC_FILE_PARAM:
spprintf(&buffered, 0, "%s:#"ZEND_ULONG_FMT, next->file.name, next->file.line);
add_next_index_string(¶ms, buffered);
break;
default: {
/* not yet */
}
}
next = next->next;
}
/* Add positional arguments */
params_ht = Z_ARRVAL(params);
phpdbg_debug("created " PRIu32 " params from arguments", zend_hash_num_elements(params_ht));
}
phpdbg_activate_err_buf(0);
phpdbg_free_err_buf();
zend_call_known_function(user_fn, NULL, NULL, NULL, 0, NULL, params_ht);
phpdbg_out("\n");
if (params_ht) {
zend_array_destroy(params_ht);
}
return SUCCESS;
}
}
return FAILURE;
} /* }}} */
struct phpdbg_init_state {
int line;
bool in_code;
char *code;
size_t code_len;
const char *init_file;
};
static void phpdbg_line_init(char *cmd, struct phpdbg_init_state *state) {
size_t cmd_len = strlen(cmd);
state->line++;
while (cmd_len > 0L && isspace(cmd[cmd_len-1])) {
cmd_len--;
}
cmd[cmd_len] = '\0';
if (*cmd && cmd_len > 0L && cmd[0] != '#') {
if (cmd_len == 2) {
if (memcmp(cmd, "<:", sizeof("<:")-1) == SUCCESS) {
state->in_code = 1;
return;
} else {
if (memcmp(cmd, ":>", sizeof(":>")-1) == SUCCESS) {
state->in_code = 0;
state->code[state->code_len] = '\0';
zend_eval_stringl(state->code, state->code_len, NULL, "phpdbginit code");
free(state->code);
state->code = NULL;
return;
}
}
}
if (state->in_code) {
if (state->code == NULL) {
state->code = malloc(cmd_len + 1);
} else {
state->code = realloc(state->code, state->code_len + cmd_len + 1);
}
if (state->code) {
memcpy(&state->code[state->code_len], cmd, cmd_len);
state->code_len += cmd_len;
}
return;
}
zend_try {
char *input = phpdbg_read_input(cmd);
phpdbg_param_t stack;
phpdbg_init_param(&stack, STACK_PARAM);
phpdbg_activate_err_buf(1);
if (phpdbg_do_parse(&stack, input) <= 0) {
switch (phpdbg_stack_execute(&stack, 1 /* allow_async_unsafe == 1 */)) {
case FAILURE:
phpdbg_activate_err_buf(0);
if (phpdbg_call_register(&stack) == FAILURE) {
if (state->init_file) {
phpdbg_output_err_buf("Unrecognized command in %s:%d: %s, %s!", state->init_file, state->line, input, PHPDBG_G(err_buf).msg);
} else {
phpdbg_output_err_buf("Unrecognized command on line %d: %s, %s!", state->line, input, PHPDBG_G(err_buf).msg);
}
}
break;
}
}
phpdbg_activate_err_buf(0);
phpdbg_free_err_buf();
phpdbg_stack_free(&stack);
phpdbg_destroy_input(&input);
} zend_catch {
PHPDBG_G(flags) &= ~(PHPDBG_IS_RUNNING | PHPDBG_IS_CLEANING);
if (PHPDBG_G(flags) & PHPDBG_IS_QUITTING) {
zend_bailout();
}
} zend_end_try();
}
}
void phpdbg_string_init(char *buffer) {
struct phpdbg_init_state state = {0};
char *str = strtok(buffer, "\n");
while (str) {
phpdbg_line_init(str, &state);
str = strtok(NULL, "\n");
}
if (state.code) {
free(state.code);
}
}
void phpdbg_try_file_init(char *init_file, size_t init_file_len, bool free_init) /* {{{ */
{
zend_stat_t sb = {0};
if (init_file && VCWD_STAT(init_file, &sb) != -1) {
FILE *fp = fopen(init_file, "r");
if (fp) {
char cmd[PHPDBG_MAX_CMD];
struct phpdbg_init_state state = {0};
state.init_file = init_file;
while (fgets(cmd, PHPDBG_MAX_CMD, fp) != NULL) {
phpdbg_line_init(cmd, &state);
}
if (state.code) {
free(state.code);
}
fclose(fp);
} else {
phpdbg_error("Failed to open %s for initialization", init_file);
}
if (free_init) {
free(init_file);
}
}
} /* }}} */
void phpdbg_init(char *init_file, size_t init_file_len, bool use_default) /* {{{ */
{
if (init_file) {
phpdbg_try_file_init(init_file, init_file_len, 1);
} else if (use_default) {
char *scan_dir = getenv("PHP_INI_SCAN_DIR");
char *sys_ini;
int i;
size_t sys_ini_length = asprintf(&sys_ini, "%s/" PHPDBG_INIT_FILENAME, PHP_CONFIG_FILE_PATH);
phpdbg_try_file_init(sys_ini, sys_ini_length, 0);
free(sys_ini);
if (!scan_dir) {
scan_dir = PHP_CONFIG_FILE_SCAN_DIR;
}
while (*scan_dir != 0) {
i = 0;
while (scan_dir[i] != ':') {
if (scan_dir[i++] == 0) {
i = -1;
break;
}
}
if (i != -1) {
scan_dir[i] = 0;
}
ZEND_IGNORE_VALUE(asprintf(&init_file, "%s/%s", scan_dir, PHPDBG_INIT_FILENAME));
phpdbg_try_file_init(init_file, init_file_len, 0);
free(init_file);
if (i == -1) {
break;
}
scan_dir += i + 1;
}
phpdbg_try_file_init(PHPDBG_STRL(PHPDBG_INIT_FILENAME), 0);
}
}
/* }}} */
void phpdbg_clean(bool full, bool resubmit) /* {{{ */
{
/* this is implicitly required */
if (PHPDBG_G(ops)) {
destroy_op_array(PHPDBG_G(ops));
efree(PHPDBG_G(ops));
PHPDBG_G(ops) = NULL;
}
if (!resubmit && PHPDBG_G(cur_command)) {
free(PHPDBG_G(cur_command));
PHPDBG_G(cur_command) = NULL;
}
if (full) {
PHPDBG_G(flags) |= PHPDBG_IS_CLEANING;
}
} /* }}} */
PHPDBG_COMMAND(exec) /* {{{ */
{
zend_stat_t sb = {0};
if (VCWD_STAT(param->str, &sb) != FAILURE) {
if (sb.st_mode & (S_IFREG|S_IFLNK)) {
char *res = phpdbg_resolve_path(param->str);
size_t res_len = strlen(res);
if ((res_len != PHPDBG_G(exec_len)) || (memcmp(res, PHPDBG_G(exec), res_len) != SUCCESS)) {
if (PHPDBG_G(in_execution)) {
if (phpdbg_ask_user_permission("Do you really want to stop execution to set a new execution context?") == FAILURE) {
free(res);
return FAILURE;
}
}
if (PHPDBG_G(exec)) {
phpdbg_notice("Unsetting old execution context: %s", PHPDBG_G(exec));
free(PHPDBG_G(exec));
PHPDBG_G(exec) = NULL;
PHPDBG_G(exec_len) = 0L;
}
if (PHPDBG_G(ops)) {
phpdbg_notice("Destroying compiled opcodes");
phpdbg_clean(0, 0);
}
PHPDBG_G(exec) = res;
PHPDBG_G(exec_len) = res_len;
VCWD_CHDIR_FILE(res);
*SG(request_info).argv = estrndup(PHPDBG_G(exec), PHPDBG_G(exec_len));
php_build_argv(NULL, &PG(http_globals)[TRACK_VARS_SERVER]);
phpdbg_notice("Set execution context: %s", PHPDBG_G(exec));
if (PHPDBG_G(in_execution)) {
phpdbg_clean(1, 0);
return SUCCESS;
}
phpdbg_compile();
} else {
free(res);
phpdbg_notice("Execution context not changed");
}
} else {
phpdbg_error("Cannot use %s as execution context, not a valid file or symlink", param->str);
}
} else {
phpdbg_error("Cannot stat %s, ensure the file exists", param->str);
}
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(stdin)
{
smart_str code = {0};
char *buf;
char *sep = param->str;
int seplen = param->len;
int bytes = 0;
smart_str_appends(&code, "?>");
do {
PHPDBG_G(input_buflen) += bytes;
if (PHPDBG_G(input_buflen) <= 0) {
continue;
}
if (sep && seplen) {
char *nl = buf = PHPDBG_G(input_buffer);
do {
if (buf == nl + seplen) {
if (!memcmp(sep, nl, seplen) && (*buf == '\n' || (*buf == '\r' && buf[1] == '\n'))) {
smart_str_appendl(&code, PHPDBG_G(input_buffer), nl - PHPDBG_G(input_buffer));
memmove(PHPDBG_G(input_buffer), ++buf, --PHPDBG_G(input_buflen));
goto exec_code;
}
}
if (*buf == '\n') {
nl = buf + 1;
}
buf++;
} while (--PHPDBG_G(input_buflen));
if (buf != nl && buf <= nl + seplen) {
smart_str_appendl(&code, PHPDBG_G(input_buffer), nl - PHPDBG_G(input_buffer));
PHPDBG_G(input_buflen) = buf - nl;
memmove(PHPDBG_G(input_buffer), nl, PHPDBG_G(input_buflen));
} else {
PHPDBG_G(input_buflen) = 0;
smart_str_appendl(&code, PHPDBG_G(input_buffer), buf - PHPDBG_G(input_buffer));
}
} else {
smart_str_appendl(&code, PHPDBG_G(input_buffer), PHPDBG_G(input_buflen));
PHPDBG_G(input_buflen) = 0;
}
} while ((bytes = phpdbg_mixed_read(PHPDBG_G(io)[PHPDBG_STDIN].fd, PHPDBG_G(input_buffer) + PHPDBG_G(input_buflen), PHPDBG_MAX_CMD - PHPDBG_G(input_buflen), -1)) > 0);
if (bytes < 0) {
PHPDBG_G(flags) |= PHPDBG_IS_QUITTING;
zend_bailout();
}
exec_code:
smart_str_0(&code);
if (phpdbg_compile_stdin(code.s) == FAILURE) {
zend_exception_error(EG(exception), E_ERROR);
zend_bailout();
}
return SUCCESS;
} /* }}} */
int phpdbg_compile_stdin(zend_string *code) {
PHPDBG_G(ops) = zend_compile_string(code, "Standard input code", ZEND_COMPILE_POSITION_AFTER_OPEN_TAG);
zend_string_release(code);
if (EG(exception)) {
return FAILURE;
}
if (PHPDBG_G(exec)) {
free(PHPDBG_G(exec));
}
PHPDBG_G(exec) = strdup("Standard input code");
PHPDBG_G(exec_len) = sizeof("Standard input code") - 1;
{ /* remove leading ?> from source */
int i;
/* remove trailing data after zero byte, used for avoiding conflicts in eval()'ed code snippets */
zend_string *source_path = strpprintf(0, "Standard input code%c%p", 0, PHPDBG_G(ops)->opcodes);
phpdbg_file_source *data = zend_hash_find_ptr(&PHPDBG_G(file_sources), source_path);
dtor_func_t dtor = PHPDBG_G(file_sources).pDestructor;
PHPDBG_G(file_sources).pDestructor = NULL;
zend_hash_del(&PHPDBG_G(file_sources), source_path);
PHPDBG_G(file_sources).pDestructor = dtor;
zend_hash_str_update_ptr(&PHPDBG_G(file_sources), "Standard input code", sizeof("Standard input code")-1, data);
zend_string_release(source_path);
for (i = 1; i <= data->lines; i++) {
data->line[i] -= 2;
}
data->len -= 2;
memmove(data->buf, data->buf + 2, data->len);
}
phpdbg_notice("Successful compilation of stdin input");
return SUCCESS;
}
int phpdbg_compile(void) /* {{{ */
{
zend_file_handle fh;
char *buf;
size_t len;
if (!PHPDBG_G(exec)) {
phpdbg_error("No execution context");
return FAILURE;
}
zend_stream_init_filename(&fh, PHPDBG_G(exec));
if (php_stream_open_for_zend_ex(&fh, USE_PATH|STREAM_OPEN_FOR_INCLUDE) == SUCCESS && zend_stream_fixup(&fh, &buf, &len) == SUCCESS) {
CG(skip_shebang) = 1;
PHPDBG_G(ops) = zend_compile_file(&fh, ZEND_INCLUDE);
zend_destroy_file_handle(&fh);
if (EG(exception)) {
zend_exception_error(EG(exception), E_ERROR);
zend_bailout();
}
phpdbg_notice("Successful compilation of %s", PHPDBG_G(exec));
return SUCCESS;
} else {
phpdbg_error("Could not open file %s", PHPDBG_G(exec));
}
zend_destroy_file_handle(&fh);
return FAILURE;
} /* }}} */
PHPDBG_COMMAND(step) /* {{{ */
{
if (PHPDBG_G(in_execution)) {
PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
}
return PHPDBG_NEXT;
} /* }}} */
PHPDBG_COMMAND(continue) /* {{{ */
{
return PHPDBG_NEXT;
} /* }}} */
int phpdbg_skip_line_helper(void) /* {{{ */ {
zend_execute_data *ex = phpdbg_user_execute_data(EG(current_execute_data));
const zend_op_array *op_array = &ex->func->op_array;
const zend_op *opline = op_array->opcodes;
PHPDBG_G(flags) |= PHPDBG_IN_UNTIL;
PHPDBG_G(seek_ex) = ex;
do {
if (opline->lineno != ex->opline->lineno
|| opline->opcode == ZEND_RETURN
|| opline->opcode == ZEND_FAST_RET
|| opline->opcode == ZEND_GENERATOR_RETURN
|| opline->opcode == ZEND_YIELD
|| opline->opcode == ZEND_YIELD_FROM
) {
zend_hash_index_update_ptr(&PHPDBG_G(seek), (zend_ulong) opline, (void *) opline);
}
} while (++opline < op_array->opcodes + op_array->last);
return PHPDBG_UNTIL;
}
/* }}} */
PHPDBG_COMMAND(until) /* {{{ */
{
if (!PHPDBG_G(in_execution)) {
phpdbg_error("Not executing");
return SUCCESS;
}
return phpdbg_skip_line_helper();
} /* }}} */
PHPDBG_COMMAND(next) /* {{{ */
{
if (!PHPDBG_G(in_execution)) {
phpdbg_error("Not executing");
return SUCCESS;
}
PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
return phpdbg_skip_line_helper();
} /* }}} */
static void phpdbg_seek_to_end(void) /* {{{ */ {
zend_execute_data *ex = phpdbg_user_execute_data(EG(current_execute_data));
const zend_op_array *op_array = &ex->func->op_array;
const zend_op *opline = op_array->opcodes;
PHPDBG_G(seek_ex) = ex;
do {
switch (opline->opcode) {
case ZEND_RETURN:
case ZEND_FAST_RET:
case ZEND_GENERATOR_RETURN:
case ZEND_YIELD:
case ZEND_YIELD_FROM:
zend_hash_index_update_ptr(&PHPDBG_G(seek), (zend_ulong) opline, (void *) opline);
}
} while (++opline < op_array->opcodes + op_array->last);
}
/* }}} */
PHPDBG_COMMAND(finish) /* {{{ */
{
if (!PHPDBG_G(in_execution)) {
phpdbg_error("Not executing");
return SUCCESS;
}
phpdbg_seek_to_end();
if (zend_hash_index_exists(&PHPDBG_G(seek), (zend_ulong) phpdbg_user_execute_data(EG(current_execute_data))->opline)) {
zend_hash_clean(&PHPDBG_G(seek));
} else {
PHPDBG_G(flags) |= PHPDBG_IN_FINISH;
}
return PHPDBG_FINISH;
} /* }}} */
PHPDBG_COMMAND(leave) /* {{{ */
{
if (!PHPDBG_G(in_execution)) {
phpdbg_error("Not executing");
return SUCCESS;
}
phpdbg_seek_to_end();
if (zend_hash_index_exists(&PHPDBG_G(seek), (zend_ulong) phpdbg_user_execute_data(EG(current_execute_data))->opline)) {
zend_hash_clean(&PHPDBG_G(seek));
phpdbg_notice("Already at the end of the function");
return SUCCESS;
} else {
PHPDBG_G(flags) |= PHPDBG_IN_LEAVE;
return PHPDBG_LEAVE;
}
} /* }}} */
PHPDBG_COMMAND(frame) /* {{{ */
{
if (!param) {
phpdbg_notice("Currently in frame #%d", PHPDBG_G(frame).num);
} else {
phpdbg_switch_frame(param->num);
}
return SUCCESS;
} /* }}} */
static inline void phpdbg_handle_exception(void) /* {{{ */
{
zend_object *ex = EG(exception);
zend_string *msg, *file;
zend_long line;
zval rv, tmp;
EG(exception) = NULL;
zend_call_known_instance_method_with_0_params(ex->ce->__tostring, ex, &tmp);
file = zval_get_string(zend_read_property_ex(zend_get_exception_base(ex), ex, ZSTR_KNOWN(ZEND_STR_FILE), /* silent */ true, &rv));
line = zval_get_long(zend_read_property_ex(zend_get_exception_base(ex), ex, ZSTR_KNOWN(ZEND_STR_LINE), /* silent */ true, &rv));
if (EG(exception)) {
EG(exception) = NULL;
msg = ZSTR_EMPTY_ALLOC();
} else {
zend_update_property_string(zend_get_exception_base(ex), ex, ZEND_STRL("string"), Z_STRVAL(tmp));
zval_ptr_dtor(&tmp);
msg = zval_get_string(zend_read_property_ex(zend_get_exception_base(ex), ex, ZSTR_KNOWN(ZEND_STR_STRING), /* silent */ true, &rv));
}
phpdbg_error("Uncaught %s in %s on line " ZEND_LONG_FMT, ZSTR_VAL(ex->ce->name), ZSTR_VAL(file), line);
zend_string_release(file);
phpdbg_writeln("%s", ZSTR_VAL(msg));
zend_string_release(msg);
if (EG(prev_exception)) {
OBJ_RELEASE(EG(prev_exception));
EG(prev_exception) = 0;
}
OBJ_RELEASE(ex);
EG(opline_before_exception) = NULL;
EG(exit_status) = 255;
} /* }}} */
PHPDBG_COMMAND(run) /* {{{ */
{
if (PHPDBG_G(ops) || PHPDBG_G(exec)) {
zend_execute_data *ex = EG(current_execute_data);
bool restore = 1;
if (PHPDBG_G(in_execution)) {
if (phpdbg_ask_user_permission("Do you really want to restart execution?") == SUCCESS) {
phpdbg_startup_run++;
phpdbg_clean(1, 1);
}
return SUCCESS;
}
if (!PHPDBG_G(ops)) {
if (phpdbg_compile() == FAILURE) {
phpdbg_error("Failed to compile %s, cannot run", PHPDBG_G(exec));
EG(exit_status) = FAILURE;
goto out;
}
}
if (param && param->type != EMPTY_PARAM && param->len != 0) {
char **argv = emalloc(5 * sizeof(char *));
char *end = param->str + param->len, *p = param->str;
char last_byte;
int argc = 0;
int i;
while (*end == '\r' || *end == '\n') *(end--) = 0;
last_byte = end[1];
end[1] = 0;
while (*p == ' ') p++;
while (*p) {
char sep = ' ';
char *buf = emalloc(end - p + 2), *q = buf;
if (*p == '<') {
/* use as STDIN */
do p++; while (*p == ' ');
if (*p == '\'' || *p == '"') {
sep = *(p++);
}
while (*p && *p != sep) {
if (*p == '\\' && (p[1] == sep || p[1] == '\\')) {
p++;
}
*(q++) = *(p++);
}
*(q++) = 0;
if (*p) {
do p++; while (*p == ' ');
}
if (*p) {
phpdbg_error("Invalid run command, cannot put further arguments after stdin");
goto free_cmd;
}
PHPDBG_G(stdin_file) = fopen(buf, "r");
if (PHPDBG_G(stdin_file) == NULL) {
phpdbg_error("Could not open '%s' for reading from stdin", buf);
goto free_cmd;
}
efree(buf);
phpdbg_register_file_handles();
break;
}
if (argc >= 4 && argc == (argc & -argc)) {
argv = erealloc(argv, (argc * 2 + 1) * sizeof(char *));
}
if (*p == '\'' || *p == '"') {
sep = *(p++);
}
if (*p == '\\' && (p[1] == '<' || p[1] == '\'' || p[1] == '"')) {
p++;
}
while (*p && *p != sep) {
if (*p == '\\' && (p[1] == sep || p[1] == '\\' || (p[1] == '#' && sep == ' '))) {
p++;
}
*(q++) = *(p++);
}
if (!*p && sep != ' ') {
phpdbg_error("Invalid run command, unterminated escape sequence");
free_cmd:
efree(buf);
for (i = 0; i < argc; i++) {
efree(argv[i]);
}
efree(argv);
end[1] = last_byte;
return SUCCESS;
}
*(q++) = 0;
argv[++argc] = erealloc(buf, q - buf);
if (*p) {
do p++; while (*p == ' ');
}
}
end[1] = last_byte;
argv[0] = SG(request_info).argv[0];
for (i = SG(request_info).argc; --i;) {
efree(SG(request_info).argv[i]);
}
efree(SG(request_info).argv);
SG(request_info).argv = erealloc(argv, ++argc * sizeof(char *));
SG(request_info).argc = argc;
php_build_argv(NULL, &PG(http_globals)[TRACK_VARS_SERVER]);
}
/* clean up from last execution */
if (ex && (ZEND_CALL_INFO(ex) & ZEND_CALL_HAS_SYMBOL_TABLE)) {
zend_hash_clean(ex->symbol_table);
} else {
zend_rebuild_symbol_table();
}
PHPDBG_G(handled_exception) = NULL;
/* clean seek state */
PHPDBG_G(flags) &= ~PHPDBG_SEEK_MASK;
zend_hash_clean(&PHPDBG_G(seek));
/* reset hit counters */
phpdbg_reset_breakpoints();
zend_try {
PHPDBG_G(flags) ^= PHPDBG_IS_INTERACTIVE;
PHPDBG_G(flags) |= PHPDBG_IS_RUNNING;
zend_execute(PHPDBG_G(ops), &PHPDBG_G(retval));
PHPDBG_G(flags) ^= PHPDBG_IS_INTERACTIVE;
} zend_catch {
PHPDBG_G(in_execution) = 0;
if (!(PHPDBG_G(flags) & PHPDBG_IS_STOPPING)) {
restore = 0;
} else {
zend_bailout();
}
} zend_end_try();
if (restore) {
zend_exception_restore();
zend_try {
zend_try_exception_handler();
PHPDBG_G(in_execution) = 1;
} zend_catch {
PHPDBG_G(in_execution) = 0;
if (PHPDBG_G(flags) & PHPDBG_IS_STOPPING) {
zend_bailout();
}
} zend_end_try();
if (EG(exception) && !zend_is_unwind_exit(EG(exception))) {
phpdbg_handle_exception();
}
}
PHPDBG_G(flags) &= ~PHPDBG_IS_RUNNING;
phpdbg_clean(1, 0);
} else {
phpdbg_error("Nothing to execute!");
}
out:
PHPDBG_FRAME(num) = 0;
return SUCCESS;
} /* }}} */
int phpdbg_output_ev_variable(char *name, size_t len, char *keyname, size_t keylen, HashTable *parent, zval *zv) /* {{{ */ {
phpdbg_notice("Printing variable %.*s", (int) len, name);
zend_print_zval_r(zv, 0);
phpdbg_out("\n");
efree(name);
efree(keyname);
return SUCCESS;
}
/* }}} */
PHPDBG_COMMAND(ev) /* {{{ */
{
bool stepping = ((PHPDBG_G(flags) & PHPDBG_IS_STEPPING) == PHPDBG_IS_STEPPING);
zval retval;
zend_execute_data *original_execute_data = EG(current_execute_data);
zend_vm_stack original_stack = EG(vm_stack);
zend_object *ex = NULL;
PHPDBG_OUTPUT_BACKUP();
original_stack->top = EG(vm_stack_top);
if (PHPDBG_G(flags) & PHPDBG_IN_SIGNAL_HANDLER) {
phpdbg_try_access {
phpdbg_parse_variable(param->str, param->len, &EG(symbol_table), 0, phpdbg_output_ev_variable, 0);
} phpdbg_catch_access {
phpdbg_error("Could not fetch data, invalid data source");
} phpdbg_end_try_access();
PHPDBG_OUTPUT_BACKUP_RESTORE();
return SUCCESS;
}
if (!(PHPDBG_G(flags) & PHPDBG_IS_STEPONEVAL)) {
PHPDBG_G(flags) &= ~PHPDBG_IS_STEPPING;
}
/* disable stepping while eval() in progress */
PHPDBG_G(flags) |= PHPDBG_IN_EVAL;
zend_try {
if (zend_eval_stringl(param->str, param->len, &retval, "eval()'d code") == SUCCESS) {
if (EG(exception)) {
ex = EG(exception);
zend_exception_error(EG(exception), E_ERROR);
} else {
zend_print_zval_r(&retval, 0);
phpdbg_out("\n");
zval_ptr_dtor(&retval);
}
}
} zend_catch {
PHPDBG_G(unclean_eval) = 1;
if (ex) {
OBJ_RELEASE(ex);
}
EG(current_execute_data) = original_execute_data;
EG(vm_stack_top) = original_stack->top;
EG(vm_stack_end) = original_stack->end;
EG(vm_stack) = original_stack;
EG(exit_status) = 0;
} zend_end_try();
PHPDBG_G(flags) &= ~PHPDBG_IN_EVAL;
/* switch stepping back on */
if (stepping && !(PHPDBG_G(flags) & PHPDBG_IS_STEPONEVAL)) {
PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
}
CG(unclean_shutdown) = 0;
PHPDBG_OUTPUT_BACKUP_RESTORE();
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(back) /* {{{ */
{
if (!PHPDBG_G(in_execution)) {
phpdbg_error("Not executing!");
return SUCCESS;
}
if (!param) {
phpdbg_dump_backtrace(0);
} else {
phpdbg_dump_backtrace(param->num);
}
return SUCCESS;
} /* }}} */