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php-src/phpdbg_bp.c

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/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2013 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> |
+----------------------------------------------------------------------+
*/
#include "zend.h"
#include "zend_hash.h"
#include "zend_llist.h"
#include "phpdbg.h"
#include "phpdbg_bp.h"
#include "phpdbg_utils.h"
#include "zend_globals.h"
ZEND_EXTERN_MODULE_GLOBALS(phpdbg);
static void phpdbg_llist_breakfile_dtor(void *data) /* {{{ */
{
phpdbg_breakfile_t *bp = (phpdbg_breakfile_t*) data;
efree((char*)bp->filename);
} /* }}} */
static void phpdbg_class_breaks_dtor(void *data) /* {{{ */
{
phpdbg_breakmethod_t *bp = (phpdbg_breakmethod_t*) data;
efree((char*)bp->class_name);
efree((char*)bp->func_name);
} /* }}} */
void phpdbg_set_breakpoint_file(const char *path, long line_num TSRMLS_DC) /* {{{ */
{
struct stat sb;
if (VCWD_STAT(path, &sb) != FAILURE) {
if (sb.st_mode & (S_IFREG|S_IFLNK)) {
phpdbg_breakfile_t new_break;
zend_llist *break_files_ptr;
size_t path_len = strlen(path);
new_break.filename = estrndup(path, path_len);
new_break.line = line_num;
PHPDBG_G(flags) |= PHPDBG_HAS_FILE_BP;
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE],
new_break.filename, path_len, (void**)&break_files_ptr) == FAILURE) {
zend_llist break_files;
zend_llist_init(&break_files, sizeof(phpdbg_breakfile_t),
phpdbg_llist_breakfile_dtor, 0);
zend_hash_update(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE],
new_break.filename, path_len, &break_files, sizeof(zend_llist),
(void**)&break_files_ptr);
}
new_break.id = PHPDBG_G(bp_count)++;
zend_llist_add_element(break_files_ptr, &new_break);
phpdbg_notice("Breakpoint #%d added at %s:%ld",
new_break.id, new_break.filename, new_break.line);
} else {
phpdbg_error("Cannot set breakpoint in %s, it is not a regular file", path);
}
} else {
phpdbg_error("Cannot stat %s, it does not exist", path);
}
} /* }}} */
void phpdbg_set_breakpoint_symbol(const char *name TSRMLS_DC) /* {{{ */
{
size_t name_len = strlen(name);
if (!zend_hash_exists(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM], name, name_len)) {
phpdbg_breaksymbol_t new_break;
PHPDBG_G(flags) |= PHPDBG_HAS_SYM_BP;
new_break.symbol = estrndup(name, name_len);
new_break.id = PHPDBG_G(bp_count)++;
zend_hash_update(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM], new_break.symbol,
name_len, &new_break, sizeof(phpdbg_breaksymbol_t), NULL);
phpdbg_notice("Breakpoint #%d added at %s",
new_break.id, new_break.symbol);
} else {
phpdbg_notice("Breakpoint exists at %s", name);
}
} /* }}} */
void phpdbg_set_breakpoint_method(const char* class_name, const char* func_name TSRMLS_DC) /* {{{ */
{
HashTable class_breaks, *class_table;
size_t class_len = strlen(class_name);
size_t func_len = strlen(func_name);
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD], class_name,
class_len, (void**)&class_table) != SUCCESS) {
zend_hash_init(&class_breaks, 8, NULL, phpdbg_class_breaks_dtor, 0);
zend_hash_update(
&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD],
class_name, class_len,
(void**)&class_breaks, sizeof(HashTable), (void**)&class_table);
}
if (!zend_hash_exists(class_table, func_name, func_len)) {
phpdbg_breakmethod_t new_break;
PHPDBG_G(flags) |= PHPDBG_HAS_METHOD_BP;
new_break.class_name = estrndup(class_name, class_len);
new_break.class_len = class_len;
new_break.func_name = estrndup(func_name, func_len);
new_break.func_len = func_len;
new_break.id = PHPDBG_G(bp_count)++;
zend_hash_update(class_table, func_name, func_len,
&new_break, sizeof(phpdbg_breakmethod_t), NULL);
phpdbg_notice("Breakpoint #%d added at %s::%s",
new_break.id, class_name, func_name);
} else {
phpdbg_notice("Breakpoint exists at %s::%s", class_name, func_name);
}
} /* }}} */
void phpdbg_set_breakpoint_opline(zend_ulong opline TSRMLS_DC) /* {{{ */
{
if (!zend_hash_index_exists(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE], opline)) {
phpdbg_breakline_t new_break;
PHPDBG_G(flags) |= PHPDBG_HAS_OPLINE_BP;
new_break.name = NULL;
new_break.opline = opline;
new_break.id = PHPDBG_G(bp_count)++;
zend_hash_index_update(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE], opline,
&new_break, sizeof(phpdbg_breakline_t), NULL);
phpdbg_notice("Breakpoint #%d added at %#lx",
new_break.id, new_break.opline);
} else {
phpdbg_notice("Breakpoint exists at %#lx", opline);
}
} /* }}} */
void phpdbg_set_breakpoint_opline_ex(phpdbg_opline_ptr_t opline TSRMLS_DC) /* {{{ */
{
if (!zend_hash_index_exists(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE], (zend_ulong) opline)) {
phpdbg_breakline_t new_break;
PHPDBG_G(flags) |= PHPDBG_HAS_OPLINE_BP;
new_break.opline = (zend_ulong) opline;
new_break.id = PHPDBG_G(bp_count)++;
zend_hash_index_update(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE],
(zend_ulong) opline, &new_break, sizeof(phpdbg_breakline_t), NULL);
phpdbg_notice("Breakpoint #%d added at %#lx",
new_break.id, new_break.opline);
}
} /* }}} */
void phpdbg_set_breakpoint_expression(const char *expr, size_t expr_len TSRMLS_DC) /* {{{ */
{
zend_ulong hash = zend_inline_hash_func(expr, expr_len);
if (!zend_hash_index_exists(&PHPDBG_G(bp)[PHPDBG_BREAK_COND], hash)) {
phpdbg_breakcond_t new_break;
zend_uint cops = CG(compiler_options);
zval pv;
ZVAL_STRINGL(&new_break.code, expr, expr_len, 1);
new_break.id = PHPDBG_G(bp_count)++;
cops = CG(compiler_options);
CG(compiler_options) = ZEND_COMPILE_DEFAULT_FOR_EVAL;
Z_STRLEN(pv) = expr_len + sizeof("return ;") - 1;
Z_STRVAL(pv) = emalloc(Z_STRLEN(pv) + 1);
memcpy(Z_STRVAL(pv), "return ", sizeof("return ") - 1);
memcpy(Z_STRVAL(pv) + sizeof("return ") - 1, expr, expr_len);
Z_STRVAL(pv)[Z_STRLEN(pv) - 1] = ';';
Z_STRVAL(pv)[Z_STRLEN(pv)] = '\0';
Z_TYPE(pv) = IS_STRING;
new_break.ops = zend_compile_string(
&pv, "Conditional Breakpoint Code" TSRMLS_CC);
if (new_break.ops) {
phpdbg_breakcond_t *broken;
zend_hash_index_update(
&PHPDBG_G(bp)[PHPDBG_BREAK_COND], hash, &new_break,
sizeof(phpdbg_breakcond_t), (void**)&broken);
phpdbg_notice("Conditional breakpoint #%d added %s/%p",
broken->id, Z_STRVAL(broken->code), broken->ops);
PHPDBG_G(flags) |= PHPDBG_HAS_COND_BP;
} else {
phpdbg_error(
"Failed to compile code for expression %s", expr);
zval_dtor(&new_break.code);
PHPDBG_G(bp_count)--;
}
CG(compiler_options) = cops;
} else {
phpdbg_notice("Conditional break %s exists", expr);
}
} /* }}} */
int phpdbg_find_breakpoint_file(zend_op_array *op_array TSRMLS_DC) /* {{{ */
{
size_t name_len = strlen(op_array->filename);
zend_llist *break_list;
zend_llist_element *le;
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], op_array->filename,
name_len, (void**)&break_list) == FAILURE) {
return FAILURE;
}
for (le = break_list->head; le; le = le->next) {
const phpdbg_breakfile_t *bp = (phpdbg_breakfile_t*)le->data;
if (bp->line == (*EG(opline_ptr))->lineno) {
phpdbg_notice("Breakpoint #%d at %s:%ld",
bp->id, bp->filename, bp->line);
return SUCCESS;
}
}
return FAILURE;
} /* }}} */
int phpdbg_find_breakpoint_symbol(zend_function *fbc TSRMLS_DC) /* {{{ */
{
const char *fname;
zend_op_array *ops;
phpdbg_breaksymbol_t *bp;
if (fbc->type != ZEND_USER_FUNCTION) {
return FAILURE;
}
ops = (zend_op_array*)fbc;
if (ops->scope) {
/* find method breaks here */
return phpdbg_find_breakpoint_method(
ops TSRMLS_CC);
}
fname = ops->function_name;
if (!fname) {
fname = "main";
}
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM], fname, strlen(fname),
(void**)&bp) == SUCCESS) {
phpdbg_notice("Breakpoint #%d in %s() at %s:%u",
bp->id, bp->symbol,
zend_get_executed_filename(TSRMLS_C),
zend_get_executed_lineno(TSRMLS_C));
return SUCCESS;
}
return FAILURE;
} /* }}} */
/*
* @TODO(anyone) this is case sensitive
*/
int phpdbg_find_breakpoint_method(zend_op_array *ops TSRMLS_DC) /* {{{ */
{
HashTable *class_table;
phpdbg_breakmethod_t *bp;
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD], ops->scope->name,
ops->scope->name_length, (void**)&class_table) == SUCCESS) {
if (zend_hash_find(
class_table,
ops->function_name,
strlen(ops->function_name), (void**)&bp) == SUCCESS) {
phpdbg_notice("Breakpoint #%d in %s::%s() at %s:%u",
bp->id, bp->class_name, bp->func_name,
zend_get_executed_filename(TSRMLS_C),
zend_get_executed_lineno(TSRMLS_C));
return SUCCESS;
}
}
return FAILURE;
} /* }}} */
int phpdbg_find_breakpoint_opline(phpdbg_opline_ptr_t opline TSRMLS_DC) /* {{{ */
{
phpdbg_breakline_t *bp;
if (zend_hash_index_find(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE],
(zend_ulong) opline, (void**)&bp) == SUCCESS) {
phpdbg_notice("Breakpoint #%d in %#lx at %s:%u",
bp->id, bp->opline,
zend_get_executed_filename(TSRMLS_C),
zend_get_executed_lineno(TSRMLS_C));
return SUCCESS;
}
return FAILURE;
} /* }}} */
int phpdbg_find_conditional_breakpoint(TSRMLS_D) /* {{{ */
{
phpdbg_breakcond_t *bp;
HashPosition position;
int breakpoint = FAILURE;
for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_COND], &position);
zend_hash_get_current_data_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_COND], (void*)&bp, &position) == SUCCESS;
zend_hash_move_forward_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_COND], &position)) {
zval *retval = NULL;
int orig_interactive = CG(interactive);
zval **orig_retval = EG(return_value_ptr_ptr);
zend_op_array *orig_ops = EG(active_op_array);
zend_op **orig_opline = EG(opline_ptr);
ALLOC_INIT_ZVAL(retval);
EG(return_value_ptr_ptr) = &retval;
EG(active_op_array) = bp->ops;
EG(no_extensions) = 1;
if (!EG(active_symbol_table)) {
zend_rebuild_symbol_table(TSRMLS_C);
}
CG(interactive) = 0;
zend_try {
PHPDBG_G(flags) |= PHPDBG_IN_COND_BP;
zend_execute(
EG(active_op_array) TSRMLS_CC);
if (i_zend_is_true(retval)) {
breakpoint = SUCCESS;
}
} zend_catch {
phpdbg_error(
"Error detected while evaluating expression %s", Z_STRVAL(bp->code));
CG(interactive) = orig_interactive;
EG(no_extensions)=1;
EG(return_value_ptr_ptr) = orig_retval;
EG(active_op_array) = orig_ops;
EG(opline_ptr) = orig_opline;
PHPDBG_G(flags) &= ~PHPDBG_IN_COND_BP;
} zend_end_try();
CG(interactive) = orig_interactive;
EG(no_extensions)=1;
EG(return_value_ptr_ptr) = orig_retval;
EG(active_op_array) = orig_ops;
EG(opline_ptr) = orig_opline;
PHPDBG_G(flags) &= ~PHPDBG_IN_COND_BP;
if (breakpoint == SUCCESS) {
break;
}
}
if (breakpoint == SUCCESS) {
phpdbg_notice("Conditional breakpoint #%d: (%s) %s:%u",
bp->id, Z_STRVAL(bp->code),
zend_get_executed_filename(TSRMLS_C),
zend_get_executed_lineno(TSRMLS_C));
}
return breakpoint;
} /* }}} */
void phpdbg_clear_breakpoints(TSRMLS_D) /* {{{ */
{
zend_hash_clean(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE]);
zend_hash_clean(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM]);
zend_hash_clean(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE]);
zend_hash_clean(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD]);
zend_hash_clean(&PHPDBG_G(bp)[PHPDBG_BREAK_COND]);
PHPDBG_G(flags) &= ~PHPDBG_BP_MASK;
PHPDBG_G(bp_count) = 0;
} /* }}} */
void phpdbg_print_breakpoints(zend_ulong type TSRMLS_DC) /* {{{ */
{
switch (type) {
case PHPDBG_BREAK_SYM: if ((PHPDBG_G(flags) & PHPDBG_HAS_SYM_BP)) {
HashPosition position;
phpdbg_breaksymbol_t *brake;
phpdbg_writeln(SEPARATE);
phpdbg_writeln("Function Breakpoints:");
for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM], &position);
zend_hash_get_current_data_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM], (void**) &brake, &position) == SUCCESS;
zend_hash_move_forward_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_SYM], &position)) {
phpdbg_writeln(
"#%d\t\t%s", brake->id, brake->symbol);
}
} break;
case PHPDBG_BREAK_METHOD: if ((PHPDBG_G(flags) & PHPDBG_HAS_METHOD_BP)) {
HashPosition position[2];
HashTable *class_table;
char *class_name = NULL;
zend_uint class_len = 0;
zend_ulong class_idx = 0L;
phpdbg_writeln(SEPARATE);
phpdbg_writeln("Method Breakpoints:");
for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD], &position[0]);
zend_hash_get_current_data_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD], (void**) &class_table, &position[0]) == SUCCESS;
zend_hash_move_forward_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD], &position[0])) {
if (zend_hash_get_current_key_ex(
&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD],
&class_name, &class_len, &class_idx, 0, &position[0]) == HASH_KEY_IS_STRING) {
phpdbg_breakmethod_t *brake;
for (zend_hash_internal_pointer_reset_ex(class_table, &position[1]);
zend_hash_get_current_data_ex(class_table, (void**)&brake, &position[1]) == SUCCESS;
zend_hash_move_forward_ex(class_table, &position[1])) {
phpdbg_writeln(
"#%d\t\t%s::%s", brake->id, brake->class_name, brake->func_name);
}
}
}
} break;
case PHPDBG_BREAK_FILE: if ((PHPDBG_G(flags) & PHPDBG_HAS_FILE_BP)) {
HashPosition position;
zend_llist *points;
phpdbg_writeln(SEPARATE);
phpdbg_writeln("File Breakpoints:");
for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], &position);
zend_hash_get_current_data_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], (void**) &points, &position) == SUCCESS;
zend_hash_move_forward_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], &position)) {
zend_llist_position lposition;
phpdbg_breakfile_t *brake;
if ((brake = zend_llist_get_first_ex(points, &lposition))) {
do {
phpdbg_writeln("#%d\t\t%s:%lu", brake->id, brake->filename, brake->line);
} while ((brake = zend_llist_get_next_ex(points, &lposition)));
}
}
} break;
case PHPDBG_BREAK_OPLINE: if ((PHPDBG_G(flags) & PHPDBG_HAS_OPLINE_BP)) {
HashPosition position;
phpdbg_breakline_t *brake;
phpdbg_writeln(SEPARATE);
phpdbg_writeln("Opline Breakpoints:");
for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE], &position);
zend_hash_get_current_data_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE], (void**) &brake, &position) == SUCCESS;
zend_hash_move_forward_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE], &position)) {
phpdbg_writeln("#%d\t\t%#lx", brake->id, brake->opline);
}
} break;
case PHPDBG_BREAK_COND: if ((PHPDBG_G(flags) & PHPDBG_HAS_COND_BP)) {
HashPosition position;
phpdbg_breakcond_t *brake;
phpdbg_writeln(SEPARATE);
phpdbg_writeln("Conditional Breakpoints:");
for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_COND], &position);
zend_hash_get_current_data_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_COND], (void**) &brake, &position) == SUCCESS;
zend_hash_move_forward_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_COND], &position)) {
phpdbg_writeln("#%d\t\t%s", brake->id, Z_STRVAL(brake->code));
}
} break;
}
} /* }}} */
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