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0e8637441c
php-src/phpdbg_prompt.c
Bob Weinand 0e8637441c Fixed segfault when input == NULL
2014-04-15 15:52:46 +00:00

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2014 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: |
| http://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 |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Felipe Pena <felipe@php.net> |
| Authors: Joe Watkins <joe.watkins@live.co.uk> |
| Authors: Bob Weinand <bwoebi@php.net> |
+----------------------------------------------------------------------+
*/
#include <stdio.h>
#include <string.h>
#include "zend.h"
#include "zend_compile.h"
#include "phpdbg.h"
#include "phpdbg_help.h"
#include "phpdbg_print.h"
#include "phpdbg_info.h"
#include "phpdbg_break.h"
#include "phpdbg_bp.h"
#include "phpdbg_opcode.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"
int yyparse(phpdbg_param_t *stack, yyscan_t scanner);
/* {{{ command declarations */
const phpdbg_command_t phpdbg_prompt_commands[] = {
PHPDBG_COMMAND_D(exec, "set execution context", 'e', NULL, "s"),
PHPDBG_COMMAND_D(compile, "attempt compilation", 'c', NULL, 0),
PHPDBG_COMMAND_D(step, "step through execution", 's', NULL, "b"),
PHPDBG_COMMAND_D(next, "continue execution", 'n', NULL, 0),
PHPDBG_COMMAND_D(run, "attempt execution", 'r', NULL, "|s"),
PHPDBG_COMMAND_D(ev, "evaluate some code", 0, NULL, "i"),
PHPDBG_COMMAND_D(until, "continue past the current line", 'u', NULL, 0),
PHPDBG_COMMAND_D(finish, "continue past the end of the stack", 'F', NULL, 0),
PHPDBG_COMMAND_D(leave, "continue until the end of the stack", 'L', NULL, 0),
PHPDBG_COMMAND_D(print, "print something", 'p', phpdbg_print_commands, 0),
PHPDBG_COMMAND_D(break, "set breakpoint", 'b', phpdbg_break_commands, "|*c"),
PHPDBG_COMMAND_D(back, "show trace", 't', NULL, "|n"),
PHPDBG_COMMAND_D(frame, "switch to a frame", 'f', NULL, "|n"),
PHPDBG_COMMAND_D(list, "lists some code", 'l', phpdbg_list_commands, "*"),
PHPDBG_COMMAND_D(info, "displays some informations", 'i', phpdbg_info_commands, "s"),
PHPDBG_COMMAND_D(clean, "clean the execution environment", 'X', NULL, 0),
PHPDBG_COMMAND_D(clear, "clear breakpoints", 'C', NULL, 0),
PHPDBG_COMMAND_D(help, "show help menu", 'h', phpdbg_help_commands, "|s"),
PHPDBG_COMMAND_D(set, "set phpdbg configuration", 'S', phpdbg_set_commands, "s"),
PHPDBG_COMMAND_D(register,"register a function", 'R', NULL, "s"),
PHPDBG_COMMAND_D(source, "execute a phpdbginit", '<', NULL, "s"),
PHPDBG_COMMAND_D(export, "export breaks to a .phpdbginit script", '>', NULL, "s"),
PHPDBG_COMMAND_D(sh, "shell a command", 0, NULL, "i"),
PHPDBG_COMMAND_D(quit, "exit phpdbg", 'q', NULL, 0),
PHPDBG_COMMAND_D(watch, "set watchpoint", 'w', phpdbg_watch_commands, "|ss"),
PHPDBG_END_COMMAND
}; /* }}} */
ZEND_EXTERN_MODULE_GLOBALS(phpdbg);
static inline int phpdbg_call_register(phpdbg_param_t *stack TSRMLS_DC) /* {{{ */
{
phpdbg_param_t *name = NULL;
if (stack->type == STACK_PARAM) {
name = stack->next;
if (!name || name->type != STR_PARAM) {
return FAILURE;
}
if (zend_hash_exists(
&PHPDBG_G(registered), name->str, name->len+1)) {
zval fname, *fretval;
zend_fcall_info fci;
ZVAL_STRINGL(&fname, name->str, name->len, 1);
memset(&fci, 0, sizeof(zend_fcall_info));
fci.size = sizeof(zend_fcall_info);
fci.function_table = &PHPDBG_G(registered);
fci.function_name = &fname;
fci.symbol_table = EG(active_symbol_table);
fci.object_ptr = NULL;
fci.retval_ptr_ptr = &fretval;
fci.no_separation = 1;
if (name->next) {
zval params;
phpdbg_param_t *next = name->next;
array_init(&params);
while (next) {
char *buffered = NULL;
switch (next->type) {
case OP_PARAM:
case COND_PARAM:
case STR_PARAM:
add_next_index_stringl(
&params,
next->str,
next->len, 1);
break;
case NUMERIC_PARAM:
add_next_index_long(&params, next->num);
break;
case METHOD_PARAM:
spprintf(&buffered, 0, "%s::%s",
next->method.class, next->method.name);
add_next_index_string(&params, buffered, 0);
break;
case NUMERIC_METHOD_PARAM:
spprintf(&buffered, 0, "%s::%s#%ld",
next->method.class, next->method.name, next->num);
add_next_index_string(&params, buffered, 0);
break;
case NUMERIC_FUNCTION_PARAM:
spprintf(&buffered, 0, "%s#%ld",
next->str, next->num);
add_next_index_string(&params, buffered, 0);
break;
case FILE_PARAM:
spprintf(&buffered, 0, "%s:%ld",
next->file.name, next->file.line);
add_next_index_string(&params, buffered, 0);
break;
case NUMERIC_FILE_PARAM:
spprintf(&buffered, 0, "%s:#%ld",
next->file.name, next->file.line);
add_next_index_string(&params, buffered, 0);
break;
default: {
/* not yet */
}
}
next = next->next;
}
zend_fcall_info_args(&fci, &params TSRMLS_CC);
} else {
fci.params = NULL;
fci.param_count = 0;
}
phpdbg_debug(
"created %d params from arguments",
fci.param_count);
zend_call_function(&fci, NULL TSRMLS_CC);
if (fretval) {
zend_print_zval_r(
fretval, 0 TSRMLS_CC);
phpdbg_writeln(EMPTY);
}
zval_dtor(&fname);
return SUCCESS;
}
}
return FAILURE;
} /* }}} */
void phpdbg_try_file_init(char *init_file, size_t init_file_len, zend_bool free_init TSRMLS_DC) /* {{{ */
{
struct stat sb;
if (init_file && VCWD_STAT(init_file, &sb) != -1) {
FILE *fp = fopen(init_file, "r");
if (fp) {
int line = 1;
char cmd[PHPDBG_MAX_CMD];
size_t cmd_len = 0L;
char *code = NULL;
size_t code_len = 0L;
zend_bool in_code = 0;
while (fgets(cmd, PHPDBG_MAX_CMD, fp) != NULL) {
cmd_len = strlen(cmd)-1;
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) {
in_code = 1;
goto next_line;
} else {
if (memcmp(cmd, ":>", sizeof(":>")-1) == SUCCESS) {
in_code = 0;
code[code_len] = '\0';
{
zend_eval_stringl(
code, code_len, NULL, "phpdbginit code" TSRMLS_CC);
}
free(code);
code = NULL;
goto next_line;
}
}
}
if (in_code) {
if (code == NULL) {
code = malloc(cmd_len + 1);
} else code = realloc(code, code_len + cmd_len + 1);
if (code) {
memcpy(
&code[code_len], cmd, cmd_len);
code_len += cmd_len;
}
goto next_line;
}
{
char *why = NULL;
char *input = phpdbg_read_input(cmd TSRMLS_CC);
phpdbg_param_t stack;
yyscan_t scanner;
YY_BUFFER_STATE state;
phpdbg_init_param(&stack, STACK_PARAM);
if (yylex_init(&scanner)) {
phpdbg_error(
"could not initialize scanner");
break;
}
state = yy_scan_string(input, scanner);
if (yyparse(&stack, scanner) <= 0) {
switch (phpdbg_stack_execute(&stack, &why TSRMLS_CC)) {
case FAILURE:
if (!(PHPDBG_G(flags) & PHPDBG_IS_QUITTING)) {
if (phpdbg_call_register(&stack TSRMLS_CC) == FAILURE) {
phpdbg_error(
"Unrecognized command in %s:%d: %s, %s!",
init_file, line, input, why);
}
}
break;
}
}
if (why) {
free(why);
why = NULL;
}
yy_delete_buffer(state, scanner);
yylex_destroy(scanner);
phpdbg_stack_free(&stack);
phpdbg_destroy_input(&input TSRMLS_CC);
}
}
next_line:
line++;
}
if (code) {
free(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, zend_bool use_default TSRMLS_DC) /* {{{ */
{
if (!init_file && use_default) {
char *scan_dir = getenv("PHP_INI_SCAN_DIR");
int i;
phpdbg_try_file_init(PHPDBG_STRL(PHP_CONFIG_FILE_PATH "/" PHPDBG_INIT_FILENAME), 0 TSRMLS_CC);
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;
}
asprintf(
&init_file, "%s/%s", scan_dir, PHPDBG_INIT_FILENAME);
phpdbg_try_file_init(init_file, strlen(init_file), 1 TSRMLS_CC);
if (i == -1) {
break;
}
scan_dir += i + 1;
}
phpdbg_try_file_init(PHPDBG_STRL(PHPDBG_INIT_FILENAME), 0 TSRMLS_CC);
} else {
phpdbg_try_file_init(init_file, init_file_len, 1 TSRMLS_CC);
}
}
PHPDBG_COMMAND(exec) /* {{{ */
{
struct stat sb;
if (VCWD_STAT(param->str, &sb) != FAILURE) {
if (sb.st_mode & (S_IFREG|S_IFLNK)) {
char *res = phpdbg_resolve_path(param->str TSRMLS_CC);
size_t res_len = strlen(res);
if ((res_len != PHPDBG_G(exec_len)) || (memcmp(res, PHPDBG_G(exec), res_len) != SUCCESS)) {
if (PHPDBG_G(exec)) {
phpdbg_notice("Unsetting old execution context: %s", PHPDBG_G(exec));
efree(PHPDBG_G(exec));
PHPDBG_G(exec) = NULL;
PHPDBG_G(exec_len) = 0L;
}
if (PHPDBG_G(ops)) {
phpdbg_notice("Destroying compiled opcodes");
phpdbg_clean(0 TSRMLS_CC);
}
PHPDBG_G(exec) = res;
PHPDBG_G(exec_len) = res_len;
*SG(request_info).argv = PHPDBG_G(exec);
php_hash_environment(TSRMLS_C);
phpdbg_notice("Set execution context: %s", PHPDBG_G(exec));
} else {
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;
} /* }}} */
int phpdbg_compile(TSRMLS_D) /* {{{ */
{
zend_file_handle fh;
if (EG(in_execution)) {
phpdbg_error("Cannot compile while in execution");
return FAILURE;
}
phpdbg_notice("Attempting compilation of %s", PHPDBG_G(exec));
if (php_stream_open_for_zend_ex(PHPDBG_G(exec), &fh,
USE_PATH|STREAM_OPEN_FOR_INCLUDE TSRMLS_CC) == SUCCESS) {
PHPDBG_G(ops) = zend_compile_file(&fh, ZEND_INCLUDE TSRMLS_CC);
zend_destroy_file_handle(&fh TSRMLS_CC);
phpdbg_notice("Success");
return SUCCESS;
} else {
phpdbg_error("Could not open file %s", PHPDBG_G(exec));
}
return FAILURE;
} /* }}} */
PHPDBG_COMMAND(compile) /* {{{ */
{
if (!PHPDBG_G(exec)) {
phpdbg_error("No execution context");
return SUCCESS;
}
if (!EG(in_execution)) {
if (PHPDBG_G(ops)) {
phpdbg_error("Destroying previously compiled opcodes");
phpdbg_clean(0 TSRMLS_CC);
}
}
phpdbg_compile(TSRMLS_C);
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(step) /* {{{ */
{
if (param->num) {
PHPDBG_G(flags) |= PHPDBG_IS_STEPPING;
} else {
PHPDBG_G(flags) &= ~PHPDBG_IS_STEPPING;
}
phpdbg_notice("Stepping %s",
(PHPDBG_G(flags) & PHPDBG_IS_STEPPING) ? "on" : "off");
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(next) /* {{{ */
{
return PHPDBG_NEXT;
} /* }}} */
PHPDBG_COMMAND(until) /* {{{ */
{
if (!EG(in_execution)) {
phpdbg_error("Not executing");
return SUCCESS;
}
PHPDBG_G(flags) |= PHPDBG_IN_UNTIL;
{
zend_uint next = 0,
self = (EG(current_execute_data)->opline - EG(active_op_array)->opcodes);
zend_op *opline = &EG(active_op_array)->opcodes[self];
for (next = self; next < EG(active_op_array)->last; next++) {
if (EG(active_op_array)->opcodes[next].lineno != opline->lineno) {
zend_hash_index_update(
&PHPDBG_G(seek),
(zend_ulong) &EG(active_op_array)->opcodes[next],
&EG(active_op_array)->opcodes[next],
sizeof(zend_op), NULL);
break;
}
}
}
return PHPDBG_UNTIL;
} /* }}} */
PHPDBG_COMMAND(finish) /* {{{ */
{
if (!EG(in_execution)) {
phpdbg_error("Not executing");
return SUCCESS;
}
PHPDBG_G(flags) |= PHPDBG_IN_FINISH;
{
zend_uint next = 0,
self = (EG(current_execute_data)->opline - EG(active_op_array)->opcodes);
for (next = self; next < EG(active_op_array)->last; next++) {
switch (EG(active_op_array)->opcodes[next].opcode) {
case ZEND_RETURN:
case ZEND_THROW:
case ZEND_EXIT:
#ifdef ZEND_YIELD
case ZEND_YIELD:
#endif
zend_hash_index_update(
&PHPDBG_G(seek),
(zend_ulong) &EG(active_op_array)->opcodes[next],
&EG(active_op_array)->opcodes[next],
sizeof(zend_op), NULL);
break;
}
}
}
return PHPDBG_FINISH;
} /* }}} */
PHPDBG_COMMAND(leave) /* {{{ */
{
if (!EG(in_execution)) {
phpdbg_error("Not executing");
return SUCCESS;
}
PHPDBG_G(flags) |= PHPDBG_IN_LEAVE;
{
zend_uint next = 0,
self = (EG(current_execute_data)->opline - EG(active_op_array)->opcodes);
for (next = self; next < EG(active_op_array)->last; next++) {
switch (EG(active_op_array)->opcodes[next].opcode) {
case ZEND_RETURN:
case ZEND_THROW:
case ZEND_EXIT:
#ifdef ZEND_YIELD
case ZEND_YIELD:
#endif
zend_hash_index_update(
&PHPDBG_G(seek),
(zend_ulong) &EG(active_op_array)->opcodes[next],
&EG(active_op_array)->opcodes[next],
sizeof(zend_op), NULL);
break;
}
}
}
return PHPDBG_LEAVE;
} /* }}} */
PHPDBG_COMMAND(frame) /* {{{ */
{
if (!param) {
phpdbg_notice("Currently in frame #%d", PHPDBG_G(frame).num);
} else phpdbg_switch_frame(param->num TSRMLS_CC);
return SUCCESS;
} /* }}} */
static inline void phpdbg_handle_exception(TSRMLS_D) /* }}} */
{
zend_fcall_info fci;
zval fname,
*trace,
exception;
/* get filename and linenumber before unsetting exception */
const char *filename = zend_get_executed_filename(TSRMLS_C);
zend_uint lineno = zend_get_executed_lineno(TSRMLS_C);
/* copy exception */
exception = *EG(exception);
zval_copy_ctor(&exception);
EG(exception) = NULL;
phpdbg_error(
"Uncaught %s!",
Z_OBJCE(exception)->name);
/* call __toString */
ZVAL_STRINGL(&fname, "__tostring", sizeof("__tostring")-1, 1);
fci.size = sizeof(fci);
fci.function_table = &Z_OBJCE(exception)->function_table;
fci.function_name = &fname;
fci.symbol_table = NULL;
fci.object_ptr = &exception;
fci.retval_ptr_ptr = &trace;
fci.param_count = 0;
fci.params = NULL;
fci.no_separation = 1;
zend_call_function(&fci, NULL TSRMLS_CC);
if (trace) {
phpdbg_writeln(
"Uncaught %s", Z_STRVAL_P(trace));
/* remember to dtor trace */
zval_ptr_dtor(&trace);
}
/* output useful information about address */
phpdbg_writeln(
"Stacked entered at %p in %s on line %u",
EG(active_op_array)->opcodes, filename, lineno);
zval_dtor(&fname);
zval_dtor(&exception);
} /* }}} */
PHPDBG_COMMAND(run) /* {{{ */
{
if (EG(in_execution)) {
phpdbg_error("Cannot start another execution while one is in progress");
return SUCCESS;
}
if (PHPDBG_G(ops) || PHPDBG_G(exec)) {
zend_op **orig_opline = EG(opline_ptr);
zend_op_array *orig_op_array = EG(active_op_array);
zval **orig_retval_ptr = EG(return_value_ptr_ptr);
zend_bool restore = 1;
zend_execute_data *ex = EG(current_execute_data);
if (!PHPDBG_G(ops)) {
if (phpdbg_compile(TSRMLS_C) == FAILURE) {
phpdbg_error("Failed to compile %s, cannot run", PHPDBG_G(exec));
goto out;
}
}
EG(active_op_array) = PHPDBG_G(ops);
EG(return_value_ptr_ptr) = &PHPDBG_G(retval);
if (!EG(active_symbol_table)) {
zend_rebuild_symbol_table(TSRMLS_C);
}
/* clean up from last execution */
if (ex && ex->symbol_table) {
zend_hash_clean(ex->symbol_table);
}
/* clean seek state */
PHPDBG_G(flags) &= ~PHPDBG_SEEK_MASK;
zend_hash_clean(
&PHPDBG_G(seek));
/* reset hit counters */
phpdbg_reset_breakpoints(TSRMLS_C);
if (param && param->type != EMPTY_PARAM) {
char **argv = emalloc(5 * sizeof(char *));
int argc = 0;
int i;
char *argv_str = strtok(param->str, " ");
while (argv_str) {
if (argc >= 4 && argc == (argc & -argc)) {
argv = erealloc(argv, (argc * 2 + 1) * sizeof(char *));
}
argv[++argc] = argv_str;
argv_str = strtok(0, " ");
argv[argc] = estrdup(argv[argc]);
}
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_hash_environment(TSRMLS_C);
}
zend_try {
php_output_activate(TSRMLS_C);
PHPDBG_G(flags) ^= PHPDBG_IS_INTERACTIVE;
zend_execute(EG(active_op_array) TSRMLS_CC);
PHPDBG_G(flags) ^= PHPDBG_IS_INTERACTIVE;
php_output_deactivate(TSRMLS_C);
} zend_catch {
EG(active_op_array) = orig_op_array;
EG(opline_ptr) = orig_opline;
EG(return_value_ptr_ptr) = orig_retval_ptr;
if (!(PHPDBG_G(flags) & PHPDBG_IS_QUITTING)) {
phpdbg_error("Caught exit/error from VM");
restore = 0;
}
} zend_end_try();
if (restore) {
if (EG(exception)) {
phpdbg_handle_exception(TSRMLS_C);
}
EG(active_op_array) = orig_op_array;
EG(opline_ptr) = orig_opline;
EG(return_value_ptr_ptr) = orig_retval_ptr;
}
} else {
phpdbg_error("Nothing to execute!");
}
out:
PHPDBG_FRAME(num) = 0;
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(ev) /* {{{ */
{
zend_bool stepping = ((PHPDBG_G(flags) & PHPDBG_IS_STEPPING)==PHPDBG_IS_STEPPING);
zval retval;
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" TSRMLS_CC) == SUCCESS) {
zend_print_zval_r(
&retval, 0 TSRMLS_CC);
phpdbg_writeln(EMPTY);
zval_dtor(&retval);
}
} 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;
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(back) /* {{{ */
{
if (!EG(in_execution)) {
phpdbg_error("Not executing!");
return SUCCESS;
}
if (!param) {
phpdbg_dump_backtrace(0 TSRMLS_CC);
} else {
phpdbg_dump_backtrace(param->num TSRMLS_CC);
}
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(print) /* {{{ */
{
phpdbg_writeln(SEPARATE);
phpdbg_notice("Execution Context Information");
#ifdef HAVE_LIBREADLINE
phpdbg_writeln("Readline\tyes");
#else
phpdbg_writeln("Readline\tno");
#endif
phpdbg_writeln("Exec\t\t%s", PHPDBG_G(exec) ? PHPDBG_G(exec) : "none");
phpdbg_writeln("Compiled\t%s", PHPDBG_G(ops) ? "yes" : "no");
phpdbg_writeln("Stepping\t%s", (PHPDBG_G(flags) & PHPDBG_IS_STEPPING) ? "on" : "off");
phpdbg_writeln("Quietness\t%s", (PHPDBG_G(flags) & PHPDBG_IS_QUIET) ? "on" : "off");
phpdbg_writeln("Oplog\t\t%s", PHPDBG_G(oplog) ? "on" : "off");
if (PHPDBG_G(ops)) {
phpdbg_writeln("Opcodes\t\t%d", PHPDBG_G(ops)->last);
if (PHPDBG_G(ops)->last_var) {
phpdbg_writeln("Variables\t%d", PHPDBG_G(ops)->last_var-1);
} else {
phpdbg_writeln("Variables\tNone");
}
}
phpdbg_writeln("Executing\t%s", EG(in_execution) ? "yes" : "no");
if (EG(in_execution)) {
phpdbg_writeln("VM Return\t%d", PHPDBG_G(vmret));
}
phpdbg_writeln("Classes\t\t%d", zend_hash_num_elements(EG(class_table)));
phpdbg_writeln("Functions\t%d", zend_hash_num_elements(EG(function_table)));
phpdbg_writeln("Constants\t%d", zend_hash_num_elements(EG(zend_constants)));
phpdbg_writeln("Included\t%d", zend_hash_num_elements(&EG(included_files)));
phpdbg_writeln(SEPARATE);
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(info) /* {{{ */
{
phpdbg_error(
"No information command selected!");
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(set) /* {{{ */
{
phpdbg_error(
"No set command selected!");
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(break) /* {{{ */
{
if (!param) {
phpdbg_set_breakpoint_file(
zend_get_executed_filename(TSRMLS_C),
zend_get_executed_lineno(TSRMLS_C) TSRMLS_CC);
} else switch (param->type) {
case ADDR_PARAM:
phpdbg_set_breakpoint_opline(param->addr TSRMLS_CC);
break;
case NUMERIC_PARAM:
if (PHPDBG_G(exec)) {
phpdbg_set_breakpoint_file(phpdbg_current_file(TSRMLS_C), param->num TSRMLS_CC);
} else {
phpdbg_error("Execution context not set!");
}
break;
case METHOD_PARAM:
phpdbg_set_breakpoint_method(param->method.class, param->method.name TSRMLS_CC);
break;
case NUMERIC_METHOD_PARAM:
phpdbg_set_breakpoint_method_opline(param->method.class, param->method.name, param->num TSRMLS_CC);
break;
case NUMERIC_FUNCTION_PARAM:
phpdbg_set_breakpoint_function_opline(param->str, param->num TSRMLS_CC);
break;
case FILE_PARAM:
phpdbg_set_breakpoint_file(param->file.name, param->file.line TSRMLS_CC);
break;
case NUMERIC_FILE_PARAM:
phpdbg_set_breakpoint_file_opline(param->file.name, param->file.line TSRMLS_CC);
break;
case COND_PARAM:
phpdbg_set_breakpoint_expression(param->str, param->len TSRMLS_CC);
break;
case STR_PARAM:
phpdbg_set_breakpoint_symbol(param->str, param->len TSRMLS_CC);
break;
case OP_PARAM:
phpdbg_set_breakpoint_opcode(param->str, param->len TSRMLS_CC);
break;
phpdbg_default_switch_case();
}
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(sh) /* {{{ */
{
FILE *fd = NULL;
if ((fd=VCWD_POPEN((char*)param->str, "w"))) {
/* do something perhaps ?? do we want input ?? */
fclose(fd);
} else {
phpdbg_error(
"Failed to execute %s", param->str);
}
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(source) /* {{{ */
{
struct stat sb;
if (VCWD_STAT(param->str, &sb) != -1) {
phpdbg_try_file_init(param->str, param->len, 0 TSRMLS_CC);
} else {
phpdbg_error(
"Failed to stat %s, file does not exist", param->str);
}
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(export) /* {{{ */
{
FILE *handle = VCWD_FOPEN(param->str, "w+");
if (handle) {
phpdbg_export_breakpoints(handle TSRMLS_CC);
fclose(handle);
} else {
phpdbg_error(
"Failed to open or create %s, check path and permissions", param->str);
}
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(register) /* {{{ */
{
zend_function *function;
char *lcname = zend_str_tolower_dup(param->str, param->len);
size_t lcname_len = strlen(lcname);
if (!zend_hash_exists(&PHPDBG_G(registered), lcname, lcname_len+1)) {
if (zend_hash_find(EG(function_table), lcname, lcname_len+1, (void**) &function) == SUCCESS) {
zend_hash_update(
&PHPDBG_G(registered), lcname, lcname_len+1, (void*)&function, sizeof(zend_function), NULL);
function_add_ref(function);
phpdbg_notice(
"Registered %s", lcname);
} else {
phpdbg_error("The requested function (%s) could not be found", param->str);
}
} else {
phpdbg_error(
"The requested name (%s) is already in use", lcname);
}
efree(lcname);
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(quit) /* {{{ */
{
/* don't allow this to loop, ever ... */
if (!(PHPDBG_G(flags) & PHPDBG_IS_QUITTING)) {
PHPDBG_G(flags) |= PHPDBG_IS_QUITTING;
zend_bailout();
}
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(clean) /* {{{ */
{
if (EG(in_execution)) {
phpdbg_error("Cannot clean environment while executing");
return SUCCESS;
}
phpdbg_notice("Cleaning Execution Environment");
phpdbg_writeln("Classes\t\t\t%d", zend_hash_num_elements(EG(class_table)));
phpdbg_writeln("Functions\t\t%d", zend_hash_num_elements(EG(function_table)));
phpdbg_writeln("Constants\t\t%d", zend_hash_num_elements(EG(zend_constants)));
phpdbg_writeln("Includes\t\t%d", zend_hash_num_elements(&EG(included_files)));
phpdbg_clean(1 TSRMLS_CC);
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(clear) /* {{{ */
{
phpdbg_notice("Clearing Breakpoints");
phpdbg_writeln("File\t\t\t%d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE]));
phpdbg_writeln("Functions\t\t%d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM]));
phpdbg_writeln("Methods\t\t\t%d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD]));
phpdbg_writeln("Oplines\t\t\t%d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE]));
phpdbg_writeln("File oplines\t\t\t%d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_OPLINE]));
phpdbg_writeln("Function oplines\t\t\t%d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_FUNCTION_OPLINE]));
phpdbg_writeln("Method oplines\t\t\t%d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD_OPLINE]));
phpdbg_writeln("Conditionals\t\t%d", zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_COND]));
phpdbg_clear_breakpoints(TSRMLS_C);
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(list) /* {{{ */
{
if (!param) {
return PHPDBG_LIST_HANDLER(lines)(PHPDBG_COMMAND_ARGS);
} else switch (param->type) {
case NUMERIC_PARAM:
return PHPDBG_LIST_HANDLER(lines)(PHPDBG_COMMAND_ARGS);
case FILE_PARAM:
return PHPDBG_LIST_HANDLER(lines)(PHPDBG_COMMAND_ARGS);
case STR_PARAM:
phpdbg_list_function_byname(param->str, param->len TSRMLS_CC);
break;
case METHOD_PARAM:
return PHPDBG_LIST_HANDLER(method)(PHPDBG_COMMAND_ARGS);
phpdbg_default_switch_case();
}
return SUCCESS;
} /* }}} */
PHPDBG_COMMAND(watch) /* {{{ */
{
if (!param || param->type == EMPTY_PARAM) {
phpdbg_list_watchpoints(TSRMLS_C);
} else switch (param->type) {
case STR_PARAM:
if (phpdbg_create_var_watchpoint(param->str, param->len TSRMLS_CC) != FAILURE) {
phpdbg_notice("Set watchpoint on %.*s", (int)param->len, param->str);
}
break;
phpdbg_default_switch_case();
}
return SUCCESS;
} /* }}} */
int phpdbg_interactive(TSRMLS_D) /* {{{ */
{
int ret = SUCCESS;
char *why = NULL;
char *input = NULL;
phpdbg_param_t stack;
PHPDBG_G(flags) |= PHPDBG_IS_INTERACTIVE;
input = phpdbg_read_input(NULL TSRMLS_CC);
if (input) {
do {
yyscan_t scanner;
YY_BUFFER_STATE state;
phpdbg_init_param(&stack, STACK_PARAM);
if (yylex_init(&scanner)) {
phpdbg_error(
"could not initialize scanner");
return FAILURE;
}
state = yy_scan_string(input, scanner);
if (yyparse(&stack, scanner) <= 0) {
switch (ret = phpdbg_stack_execute(&stack, &why TSRMLS_CC)) {
case FAILURE:
if (!(PHPDBG_G(flags) & PHPDBG_IS_QUITTING)) {
if (phpdbg_call_register(&stack TSRMLS_CC) == FAILURE) {
if (why) {
phpdbg_error("%s", why);
}
}
}
if (why) {
free(why);
why = NULL;
}
break;
case PHPDBG_LEAVE:
case PHPDBG_FINISH:
case PHPDBG_UNTIL:
case PHPDBG_NEXT: {
if (!EG(in_execution)) {
phpdbg_error("Not running");
}
goto out;
}
}
}
if (why) {
free(why);
why = NULL;
}
yy_delete_buffer(state, scanner);
yylex_destroy(scanner);
phpdbg_stack_free(&stack);
phpdbg_destroy_input(&input TSRMLS_CC);
} while ((input = phpdbg_read_input(NULL TSRMLS_CC)));
if (!input)
goto last;
} else {
last:
if (PHPDBG_G(lcmd)) {
ret = PHPDBG_G(lcmd)->handler(
&PHPDBG_G(lparam) TSRMLS_CC);
goto out;
}
}
out:
if (input) {
phpdbg_stack_free(&stack);
phpdbg_destroy_input(&input TSRMLS_CC);
}
if (why) {
free(why);
}
if (EG(in_execution)) {
phpdbg_restore_frame(TSRMLS_C);
}
PHPDBG_G(flags) &= ~PHPDBG_IS_INTERACTIVE;
phpdbg_print_changed_zvals(TSRMLS_C);
return ret;
} /* }}} */
void phpdbg_clean(zend_bool full TSRMLS_DC) /* {{{ */
{
/* this is implicitly required */
if (PHPDBG_G(ops)) {
destroy_op_array(PHPDBG_G(ops) TSRMLS_CC);
efree(PHPDBG_G(ops));
PHPDBG_G(ops) = NULL;
}
if (full) {
PHPDBG_G(flags) |= PHPDBG_IS_CLEANING;
zend_bailout();
}
} /* }}} */
static inline zend_execute_data *phpdbg_create_execute_data(zend_op_array *op_array, zend_bool nested TSRMLS_DC) /* {{{ */
{
#if PHP_VERSION_ID >= 50500
return zend_create_execute_data_from_op_array(op_array, nested TSRMLS_CC);
#else
#undef EX
#define EX(element) execute_data->element
#undef EX_CV
#define EX_CV(var) EX(CVs)[var]
#undef EX_CVs
#define EX_CVs() EX(CVs)
#undef EX_T
#define EX_T(offset) (*(temp_variable *)((char *) EX(Ts) + offset))
#undef EX_Ts
#define EX_Ts() EX(Ts)
zend_execute_data *execute_data = (zend_execute_data *)zend_vm_stack_alloc(
ZEND_MM_ALIGNED_SIZE(sizeof(zend_execute_data)) +
ZEND_MM_ALIGNED_SIZE(sizeof(zval**) * op_array->last_var * (EG(active_symbol_table) ? 1 : 2)) +
ZEND_MM_ALIGNED_SIZE(sizeof(temp_variable)) * op_array->T TSRMLS_CC);
EX(CVs) = (zval***)((char*)execute_data + ZEND_MM_ALIGNED_SIZE(sizeof(zend_execute_data)));
memset(EX(CVs), 0, sizeof(zval**) * op_array->last_var);
EX(Ts) = (temp_variable *)(((char*)EX(CVs)) + ZEND_MM_ALIGNED_SIZE(sizeof(zval**) * op_array->last_var * (EG(active_symbol_table) ? 1 : 2)));
EX(fbc) = NULL;
EX(called_scope) = NULL;
EX(object) = NULL;
EX(old_error_reporting) = NULL;
EX(op_array) = op_array;
EX(symbol_table) = EG(active_symbol_table);
EX(prev_execute_data) = EG(current_execute_data);
EG(current_execute_data) = execute_data;
EX(nested) = nested;
if (!op_array->run_time_cache && op_array->last_cache_slot) {
op_array->run_time_cache = ecalloc(op_array->last_cache_slot, sizeof(void*));
}
if (op_array->this_var != -1 && EG(This)) {
Z_ADDREF_P(EG(This)); /* For $this pointer */
if (!EG(active_symbol_table)) {
EX_CV(op_array->this_var) = (zval**)EX_CVs() + (op_array->last_var + op_array->this_var);
*EX_CV(op_array->this_var) = EG(This);
} else {
if (zend_hash_add(EG(active_symbol_table), "this", sizeof("this"), &EG(This), sizeof(zval *), (void**)&EX_CV(op_array->this_var))==FAILURE) {
Z_DELREF_P(EG(This));
}
}
}
EX(opline) = UNEXPECTED((op_array->fn_flags & ZEND_ACC_INTERACTIVE) != 0) && EG(start_op) ? EG(start_op) : op_array->opcodes;
EG(opline_ptr) = &EX(opline);
EX(function_state).function = (zend_function *) op_array;
EX(function_state).arguments = NULL;
return execute_data;
#endif
} /* }}} */
#if PHP_VERSION_ID >= 50500
void phpdbg_execute_ex(zend_execute_data *execute_data TSRMLS_DC) /* {{{ */
{
#else
void phpdbg_execute_ex(zend_op_array *op_array TSRMLS_DC) /* {{{ */
{
long long flags = 0;
zend_ulong address = 0L;
zend_execute_data *execute_data;
zend_bool nested = 0;
#endif
zend_bool original_in_execution = EG(in_execution);
HashTable vars;
#if PHP_VERSION_ID < 50500
if (EG(exception)) {
return;
}
#endif
EG(in_execution) = 1;
#if PHP_VERSION_ID >= 50500
if (0) {
zend_vm_enter:
execute_data = phpdbg_create_execute_data(EG(active_op_array), 1 TSRMLS_CC);
}
zend_hash_init(&vars, EG(active_op_array)->last, NULL, NULL, 0);
#else
zend_vm_enter:
execute_data = phpdbg_create_execute_data(op_array, nested TSRMLS_CC);
nested = 1;
zend_hash_init(&vars, EG(active_op_array)->last, NULL, NULL, 0);
#endif
while (1) {
if ((PHPDBG_G(flags) & PHPDBG_BP_RESOLVE_MASK)) {
/* resolve nth opline breakpoints */
phpdbg_resolve_op_array_breaks(EG(active_op_array) TSRMLS_CC);
}
#ifdef ZEND_WIN32
if (EG(timed_out)) {
zend_timeout(0);
}
#endif
#define DO_INTERACTIVE() do { \
if (!(PHPDBG_G(flags) & PHPDBG_IN_EVAL)) { \
phpdbg_list_file( \
zend_get_executed_filename(TSRMLS_C), \
3, \
zend_get_executed_lineno(TSRMLS_C)-1, \
zend_get_executed_lineno(TSRMLS_C) \
TSRMLS_CC \
); \
} \
\
do { \
switch (phpdbg_interactive(TSRMLS_C)) { \
case PHPDBG_LEAVE: \
case PHPDBG_FINISH: \
case PHPDBG_UNTIL: \
case PHPDBG_NEXT:{ \
goto next; \
} \
} \
} while (!(PHPDBG_G(flags) & PHPDBG_IS_QUITTING)); \
} while (0)
/* allow conditional breakpoints and
initialization to access the vm uninterrupted */
if ((PHPDBG_G(flags) & PHPDBG_IN_COND_BP) ||
(PHPDBG_G(flags) & PHPDBG_IS_INITIALIZING)) {
/* skip possible breakpoints */
goto next;
}
/* perform seek operation */
if (PHPDBG_G(flags) & PHPDBG_SEEK_MASK) {
/* current address */
zend_ulong address = (zend_ulong) execute_data->opline;
/* run to next line */
if (PHPDBG_G(flags) & PHPDBG_IN_UNTIL) {
if (zend_hash_index_exists(&PHPDBG_G(seek), address)) {
PHPDBG_G(flags) &= ~PHPDBG_IN_UNTIL;
zend_hash_clean(
&PHPDBG_G(seek));
} else {
/* skip possible breakpoints */
goto next;
}
}
/* run to finish */
if (PHPDBG_G(flags) & PHPDBG_IN_FINISH) {
if (zend_hash_index_exists(&PHPDBG_G(seek), address)) {
PHPDBG_G(flags) &= ~PHPDBG_IN_FINISH;
zend_hash_clean(
&PHPDBG_G(seek));
}
/* skip possible breakpoints */
goto next;
}
/* break for leave */
if (PHPDBG_G(flags) & PHPDBG_IN_LEAVE) {
if (zend_hash_index_exists(&PHPDBG_G(seek), address)) {
PHPDBG_G(flags) &= ~PHPDBG_IN_LEAVE;
zend_hash_clean(
&PHPDBG_G(seek));
phpdbg_notice(
"Breaking for leave at %s:%u",
zend_get_executed_filename(TSRMLS_C),
zend_get_executed_lineno(TSRMLS_C)
);
DO_INTERACTIVE();
} else {
/* skip possible breakpoints */
goto next;
}
}
}
/* not while in conditionals */
phpdbg_print_opline_ex(
execute_data, &vars, 0 TSRMLS_CC);
/* check if some watchpoint was hit */
{
if (phpdbg_print_changed_zvals(TSRMLS_C) == SUCCESS) {
DO_INTERACTIVE();
}
}
/* search for breakpoints */
{
phpdbg_breakbase_t *brake;
if ((PHPDBG_G(flags) & PHPDBG_BP_MASK) &&
(brake = phpdbg_find_breakpoint(execute_data TSRMLS_CC))) {
phpdbg_hit_breakpoint(
brake, 1 TSRMLS_CC);
DO_INTERACTIVE();
}
}
if (PHPDBG_G(flags) & PHPDBG_IS_STEPPING) {
DO_INTERACTIVE();
}
next:
if (PHPDBG_G(flags) & PHPDBG_IS_SIGNALED) {
phpdbg_writeln(EMPTY);
phpdbg_notice("Program received signal SIGINT");
PHPDBG_G(flags) &= ~PHPDBG_IS_SIGNALED;
DO_INTERACTIVE();
}
PHPDBG_G(vmret) = execute_data->opline->handler(execute_data TSRMLS_CC);
if (PHPDBG_G(vmret) > 0) {
switch (PHPDBG_G(vmret)) {
case 1:
EG(in_execution) = original_in_execution;
zend_hash_destroy(&vars);
return;
case 2:
#if PHP_VERSION_ID < 50500
op_array = EG(active_op_array);
#endif
zend_hash_destroy(&vars);
goto zend_vm_enter;
break;
case 3:
execute_data = EG(current_execute_data);
break;
default:
break;
}
}
}
zend_error_noreturn(E_ERROR, "Arrived at end of main loop which shouldn't happen");
} /* }}} */
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