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phpdbg_bp.c
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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 |
| [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 "zend.h"
#include "zend_hash.h"
#include "phpdbg.h"
#include "phpdbg_bp.h"
#include "phpdbg_utils.h"
#include "phpdbg_opcode.h"
#include "zend_globals.h"
ZEND_EXTERN_MODULE_GLOBALS(phpdbg);
/* {{{ private api functions */
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_file(zend_op_array* TSRMLS_DC);
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_symbol(zend_function* TSRMLS_DC);
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_method(zend_op_array* TSRMLS_DC);
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_opline(phpdbg_opline_ptr_t TSRMLS_DC);
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_opcode(zend_uchar TSRMLS_DC);
static inline phpdbg_breakbase_t *phpdbg_find_conditional_breakpoint(zend_execute_data *execute_data TSRMLS_DC); /* }}} */
/*
* Note:
* A break point must always set the correct id and type
* A set breakpoint function must always map new points
*/
static inline void _phpdbg_break_mapping(int id, HashTable *table TSRMLS_DC)
{
zend_hash_index_update(
&PHPDBG_G(bp)[PHPDBG_BREAK_MAP], (id), (void**) &table, sizeof(void*), NULL);
}
#define PHPDBG_BREAK_MAPPING(id, table) _phpdbg_break_mapping(id, table TSRMLS_CC)
#define PHPDBG_BREAK_UNMAPPING(id) \
zend_hash_index_del(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP], (id))
#define PHPDBG_BREAK_INIT(b, t) do {\
b.id = PHPDBG_G(bp_count)++; \
b.type = t; \
b.disabled = 0;\
b.hits = 0; \
} while(0)
static void phpdbg_file_breaks_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);
} /* }}} */
static void phpdbg_opline_class_breaks_dtor(void *data) /* {{{ */
{
zend_hash_destroy((HashTable *)data);
} /* }}} */
static void phpdbg_opline_breaks_dtor(void *data) /* {{{ */
{
phpdbg_breakopline_t *bp = (phpdbg_breakopline_t *) data;
if (bp->class_name) {
efree((char*)bp->class_name);
}
if (bp->func_name) {
efree((char*)bp->func_name);
}
} /* }}} */
PHPDBG_API void phpdbg_reset_breakpoints(TSRMLS_D) /* {{{ */
{
if (zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP])) {
HashPosition position[2];
HashTable **table = NULL;
for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP], &position[0]);
zend_hash_get_current_data_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP], (void**)&table, &position[0]) == SUCCESS;
zend_hash_move_forward_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP], &position[0])) {
phpdbg_breakbase_t *brake;
for (zend_hash_internal_pointer_reset_ex((*table), &position[1]);
zend_hash_get_current_data_ex((*table), (void**)&brake, &position[1]) == SUCCESS;
zend_hash_move_forward_ex((*table), &position[1])) {
brake->hits = 0;
}
}
}
} /* }}} */
PHPDBG_API void phpdbg_export_breakpoints(FILE *handle TSRMLS_DC) /* {{{ */
{
HashPosition position[2];
HashTable **table = NULL;
zend_ulong id = 0L;
if (zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP])) {
phpdbg_notice(
"Exporting %d breakpoints",
zend_hash_num_elements(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP]));
/* this only looks like magic, it isn't */
for (zend_hash_internal_pointer_reset_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP], &position[0]);
zend_hash_get_current_data_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP], (void**)&table, &position[0]) == SUCCESS;
zend_hash_move_forward_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP], &position[0])) {
phpdbg_breakbase_t *brake;
zend_hash_get_current_key_ex(&PHPDBG_G(bp)[PHPDBG_BREAK_MAP], NULL, NULL, &id, 0, &position[0]);
for (zend_hash_internal_pointer_reset_ex((*table), &position[1]);
zend_hash_get_current_data_ex((*table), (void**)&brake, &position[1]) == SUCCESS;
zend_hash_move_forward_ex((*table), &position[1])) {
if (brake->id == id) {
switch (brake->type) {
case PHPDBG_BREAK_FILE: {
fprintf(handle,
"break file %s:%lu\n",
((phpdbg_breakfile_t*)brake)->filename,
((phpdbg_breakfile_t*)brake)->line);
} break;
case PHPDBG_BREAK_SYM: {
fprintf(handle,
"break func %s\n",
((phpdbg_breaksymbol_t*)brake)->symbol);
} break;
case PHPDBG_BREAK_METHOD: {
fprintf(handle,
"break method %s::%s\n",
((phpdbg_breakmethod_t*)brake)->class_name,
((phpdbg_breakmethod_t*)brake)->func_name);
} break;
case PHPDBG_BREAK_METHOD_OPLINE: {
fprintf(handle,
"break address %s::%s#%ld\n",
((phpdbg_breakopline_t*)brake)->class_name,
((phpdbg_breakopline_t*)brake)->func_name,
((phpdbg_breakopline_t*)brake)->opline_num);
} break;
case PHPDBG_BREAK_FUNCTION_OPLINE: {
fprintf(handle,
"break address %s#%ld\n",
((phpdbg_breakopline_t*)brake)->func_name,
((phpdbg_breakopline_t*)brake)->opline_num);
} break;
case PHPDBG_BREAK_FILE_OPLINE: {
fprintf(handle,
"break address %s:%ld\n",
((phpdbg_breakopline_t*)brake)->class_name,
((phpdbg_breakopline_t*)brake)->opline_num);
} break;
case PHPDBG_BREAK_OPCODE: {
fprintf(handle,
"break op %s\n",
((phpdbg_breakop_t*)brake)->name);
} break;
case PHPDBG_BREAK_COND: {
phpdbg_breakcond_t *conditional = (phpdbg_breakcond_t*) brake;
if (conditional->paramed) {
switch (conditional->param.type) {
case STR_PARAM:
fprintf(handle,
"break at %s if %s\n", conditional->param.str, conditional->code);
break;
case METHOD_PARAM:
fprintf(handle,
"break at %s::%s if %s\n",
conditional->param.method.class, conditional->param.method.name,
conditional->code);
break;
case FILE_PARAM:
fprintf(handle,
"break at %s:%lu if %s\n",
conditional->param.file.name, conditional->param.file.line,
conditional->code);
break;
default: { /* do nothing */ } break;
}
} else {
fprintf(
handle, "break on %s\n", conditional->code);
}
} break;
}
}
}
}
}
} /* }}} */
PHPDBG_API 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)) {
HashTable *broken;
phpdbg_breakfile_t new_break;
size_t path_len = strlen(path);
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE],
path, path_len, (void**)&broken) == FAILURE) {
HashTable breaks;
zend_hash_init(&breaks, 8, NULL, phpdbg_file_breaks_dtor, 0);
zend_hash_update(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE],
path, path_len, &breaks, sizeof(HashTable),
(void**)&broken);
}
if (!zend_hash_index_exists(broken, line_num)) {
PHPDBG_G(flags) |= PHPDBG_HAS_FILE_BP;
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_FILE);
new_break.filename = estrndup(path, path_len);
new_break.line = line_num;
zend_hash_index_update(
broken, line_num, (void**)&new_break, sizeof(phpdbg_breakfile_t), NULL);
phpdbg_notice("Breakpoint #%d added at %s:%ld",
new_break.id, new_break.filename, new_break.line);
PHPDBG_BREAK_MAPPING(new_break.id, broken);
} else {
phpdbg_error("Breakpoint at %s:%ld exists", path, line_num);
}
} 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);
}
} /* }}} */
PHPDBG_API void phpdbg_set_breakpoint_symbol(const char *name, size_t name_len TSRMLS_DC) /* {{{ */
{
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;
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_SYM);
new_break.symbol = estrndup(name, name_len);
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);
PHPDBG_BREAK_MAPPING(new_break.id, &PHPDBG_G(bp)[PHPDBG_BREAK_SYM]);
} else {
phpdbg_notice("Breakpoint exists at %s", name);
}
} /* }}} */
PHPDBG_API 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);
char *lcname = zend_str_tolower_dup(func_name, func_len);
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, lcname, func_len)) {
phpdbg_breakmethod_t new_break;
PHPDBG_G(flags) |= PHPDBG_HAS_METHOD_BP;
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_METHOD);
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;
zend_hash_update(class_table, lcname, func_len,
&new_break, sizeof(phpdbg_breakmethod_t), NULL);
phpdbg_notice("Breakpoint #%d added at %s::%s",
new_break.id, class_name, func_name);
PHPDBG_BREAK_MAPPING(new_break.id, class_table);
} else {
phpdbg_notice("Breakpoint exists at %s::%s", class_name, func_name);
}
efree(lcname);
} /* }}} */
PHPDBG_API 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;
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_OPLINE);
new_break.name = NULL;
new_break.opline = opline;
new_break.base = NULL;
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);
PHPDBG_BREAK_MAPPING(new_break.id, &PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE]);
} else {
phpdbg_notice("Breakpoint exists at %#lx", opline);
}
} /* }}} */
PHPDBG_API int phpdbg_resolve_op_array_break(phpdbg_breakopline_t *brake, zend_op_array *op_array TSRMLS_DC) /* {{{ */
{
phpdbg_breakline_t opline_break;
if (op_array->last < brake->opline_num) {
if (brake->class_name == NULL) {
phpdbg_error("There are only %d oplines in function %s (breaking at opline %ld impossible)", op_array->last, brake->func_name, brake->opline_num);
} else if (brake->func_name == NULL) {
phpdbg_error("There are only %d oplines in file %s (breaking at opline %ld impossible)", op_array->last, brake->class_name, brake->opline_num);
} else {
phpdbg_error("There are only %d oplines in method %s::%s (breaking at opline %ld impossible)", op_array->last, brake->class_name, brake->func_name, brake->opline_num);
}
return FAILURE;
}
opline_break.disabled = 0;
opline_break.hits = 0;
opline_break.id = brake->id;
opline_break.opline = brake->opline = (zend_ulong)(op_array->opcodes + brake->opline_num);
opline_break.name = NULL;
opline_break.base = brake;
if (op_array->scope) {
opline_break.type = PHPDBG_BREAK_METHOD_OPLINE;
} else if (op_array->function_name) {
opline_break.type = PHPDBG_BREAK_FUNCTION_OPLINE;
} else {
opline_break.type = PHPDBG_BREAK_FILE_OPLINE;
}
PHPDBG_G(flags) |= PHPDBG_HAS_OPLINE_BP;
zend_hash_index_update(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE], opline_break.opline, &opline_break, sizeof(phpdbg_breakline_t), NULL);
return SUCCESS;
} /* }}} */
PHPDBG_API void phpdbg_resolve_op_array_breaks(zend_op_array *op_array TSRMLS_DC) /* {{{ */
{
HashTable *func_table = &PHPDBG_G(bp)[PHPDBG_BREAK_FUNCTION_OPLINE];
HashTable *oplines_table;
HashPosition position;
phpdbg_breakopline_t *brake;
if (op_array->scope != NULL &&
zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD_OPLINE], op_array->scope->name, op_array->scope->name_length, (void **)&func_table) == FAILURE) {
return;
}
if (op_array->function_name == NULL) {
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_OPLINE], op_array->filename, strlen(op_array->filename), (void **)&oplines_table) == FAILURE) {
return;
}
} else if (zend_hash_find(func_table, op_array->function_name?op_array->function_name:"", op_array->function_name?strlen(op_array->function_name):0, (void **)&oplines_table) == FAILURE) {
return;
}
for (zend_hash_internal_pointer_reset_ex(oplines_table, &position);
zend_hash_get_current_data_ex(oplines_table, (void**) &brake, &position) == SUCCESS;
zend_hash_move_forward_ex(oplines_table, &position)) {
if (phpdbg_resolve_op_array_break(brake, op_array TSRMLS_CC) == SUCCESS) {
phpdbg_breakline_t *opline_break;
zend_hash_internal_pointer_end(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE]);
zend_hash_get_current_data(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE], (void **)&opline_break);
phpdbg_notice("Breakpoint #%d resolved at %s%s%s#%ld (opline %#lx)",
brake->id,
brake->class_name?brake->class_name:"",
brake->class_name&&brake->func_name?"::":"",
brake->func_name?brake->func_name:"",
brake->opline_num,
brake->opline);
}
}
} /* }}} */
PHPDBG_API int phpdbg_resolve_opline_break(phpdbg_breakopline_t *new_break TSRMLS_DC) /* {{{ */
{
HashTable *func_table = EG(function_table);
zend_function *func;
if (new_break->func_name == NULL) {
if (EG(current_execute_data) == NULL) {
if (PHPDBG_G(ops) != NULL && !memcmp(PHPDBG_G(ops)->filename, new_break->class_name, new_break->class_len)) {
if (phpdbg_resolve_op_array_break(new_break, PHPDBG_G(ops) TSRMLS_CC) == SUCCESS) {
return SUCCESS;
} else {
return 2;
}
}
return FAILURE;
} else {
zend_execute_data *execute_data = EG(current_execute_data);
do {
if (execute_data->op_array->function_name == NULL && execute_data->op_array->scope == NULL && !memcmp(execute_data->op_array->filename, new_break->class_name, new_break->class_len)) {
if (phpdbg_resolve_op_array_break(new_break, execute_data->op_array TSRMLS_CC) == SUCCESS) {
return SUCCESS;
} else {
return 2;
}
}
} while ((execute_data = execute_data->prev_execute_data) != NULL);
return FAILURE;
}
}
if (new_break->class_name != NULL) {
zend_class_entry **ce;
if (zend_hash_find(EG(class_table), zend_str_tolower_dup(new_break->class_name, new_break->class_len), new_break->class_len + 1, (void **)&ce) == FAILURE) {
return FAILURE;
}
func_table = &(*ce)->function_table;
}
if (zend_hash_find(func_table, zend_str_tolower_dup(new_break->func_name, new_break->func_len), new_break->func_len + 1, (void **)&func) == FAILURE) {
if (new_break->class_name != NULL && new_break->func_name != NULL) {
phpdbg_error("Method %s doesn't exist in class %s", new_break->func_name, new_break->class_name);
return 2;
}
return FAILURE;
}
if (func->type != ZEND_USER_FUNCTION) {
if (new_break->class_name == NULL) {
phpdbg_error("%s is not an user defined function, no oplines exist", new_break->func_name);
} else {
phpdbg_error("%s::%s is not an user defined method, no oplines exist", new_break->class_name, new_break->func_name);
}
return 2;
}
if (phpdbg_resolve_op_array_break(new_break, &func->op_array TSRMLS_CC) == FAILURE) {
return 2;
}
return SUCCESS;
} /* }}} */
PHPDBG_API void phpdbg_set_breakpoint_method_opline(const char *class, const char *method, zend_ulong opline TSRMLS_DC) /* {{{ */
{
phpdbg_breakopline_t new_break;
HashTable class_breaks, *class_table;
HashTable method_breaks, *method_table;
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_METHOD_OPLINE);
new_break.func_len = strlen(method);
new_break.func_name = estrndup(method, new_break.func_len);
new_break.class_len = strlen(class);
new_break.class_name = estrndup(class, new_break.class_len);
new_break.opline_num = opline;
new_break.opline = 0;
switch (phpdbg_resolve_opline_break(&new_break TSRMLS_CC)) {
case FAILURE:
phpdbg_notice("Pending breakpoint #%d at %s::%s#%ld", new_break.id, new_break.class_name, new_break.func_name, opline);
break;
case SUCCESS:
phpdbg_notice("Breakpoint #%d added at %s::%s#%ld", new_break.id, new_break.class_name, new_break.func_name, opline);
break;
case 2:
return;
}
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD_OPLINE], new_break.class_name, new_break.class_len, (void **)&class_table) == FAILURE) {
zend_hash_init(&class_breaks, 8, NULL, phpdbg_opline_class_breaks_dtor, 0);
zend_hash_update(
&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD_OPLINE],
new_break.class_name,
new_break.class_len,
(void **)&class_breaks, sizeof(HashTable), (void **)&class_table);
}
if (zend_hash_find(class_table, new_break.func_name, new_break.func_len, (void **)&method_table) == FAILURE) {
zend_hash_init(&method_breaks, 8, NULL, phpdbg_opline_breaks_dtor, 0);
zend_hash_update(
class_table,
new_break.func_name,
new_break.func_len,
(void **)&method_breaks, sizeof(HashTable), (void **)&method_table);
}
if (zend_hash_index_exists(method_table, opline)) {
phpdbg_notice("Breakpoint already exists for %s::%s#%ld", new_break.class_name, new_break.func_name, opline);
efree((char*)new_break.func_name);
efree((char*)new_break.class_name);
PHPDBG_G(bp_count)--;
return;
}
PHPDBG_G(flags) |= PHPDBG_HAS_METHOD_OPLINE_BP;
PHPDBG_BREAK_MAPPING(new_break.id, method_table);
zend_hash_index_update(method_table, opline, &new_break, sizeof(phpdbg_breakopline_t), NULL);
}
PHPDBG_API void phpdbg_set_breakpoint_function_opline(const char *function, zend_ulong opline TSRMLS_DC) /* {{{ */
{
phpdbg_breakopline_t new_break;
HashTable func_breaks, *func_table;
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_FUNCTION_OPLINE);
new_break.func_len = strlen(function);
new_break.func_name = estrndup(function, new_break.func_len);
new_break.class_len = 0;
new_break.class_name = NULL;
new_break.opline_num = opline;
new_break.opline = 0;
switch (phpdbg_resolve_opline_break(&new_break TSRMLS_CC)) {
case FAILURE:
phpdbg_notice("Pending breakpoint #%d at %s#%ld", new_break.id, new_break.func_name, opline);
break;
case SUCCESS:
phpdbg_notice("Breakpoint #%d added at %s#%ld", new_break.id, new_break.func_name, opline);
break;
case 2:
return;
}
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FUNCTION_OPLINE], new_break.func_name, new_break.func_len, (void **)&func_table) == FAILURE) {
zend_hash_init(&func_breaks, 8, NULL, phpdbg_opline_breaks_dtor, 0);
zend_hash_update(
&PHPDBG_G(bp)[PHPDBG_BREAK_FUNCTION_OPLINE],
new_break.func_name,
new_break.func_len,
(void **)&func_breaks, sizeof(HashTable), (void **)&func_table);
}
if (zend_hash_index_exists(func_table, opline)) {
phpdbg_notice("Breakpoint already exists for %s#%ld", new_break.func_name, opline);
efree((char*)new_break.func_name);
PHPDBG_G(bp_count)--;
return;
}
PHPDBG_BREAK_MAPPING(new_break.id, func_table);
PHPDBG_G(flags) |= PHPDBG_HAS_FUNCTION_OPLINE_BP;
zend_hash_index_update(func_table, opline, &new_break, sizeof(phpdbg_breakopline_t), NULL);
}
PHPDBG_API void phpdbg_set_breakpoint_file_opline(const char *file, zend_ulong opline TSRMLS_DC) /* {{{ */
{
phpdbg_breakopline_t new_break;
HashTable file_breaks, *file_table;
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_FILE_OPLINE);
new_break.func_len = 0;
new_break.func_name = NULL;
new_break.class_len = strlen(file);
new_break.class_name = estrndup(file, new_break.class_len);
new_break.opline_num = opline;
new_break.opline = 0;
switch (phpdbg_resolve_opline_break(&new_break TSRMLS_CC)) {
case FAILURE:
phpdbg_notice("Pending breakpoint #%d at %s:%ld", new_break.id, new_break.class_name, opline);
break;
case SUCCESS:
phpdbg_notice("Breakpoint #%d added at %s:%ld", new_break.id, new_break.class_name, opline);
break;
case 2:
return;
}
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_OPLINE], new_break.class_name, new_break.class_len, (void **)&file_table) == FAILURE) {
zend_hash_init(&file_breaks, 8, NULL, phpdbg_opline_breaks_dtor, 0);
zend_hash_update(
&PHPDBG_G(bp)[PHPDBG_BREAK_FILE_OPLINE],
new_break.class_name,
new_break.class_len,
(void **)&file_breaks, sizeof(HashTable), (void **)&file_table);
}
if (zend_hash_index_exists(file_table, opline)) {
phpdbg_notice("Breakpoint already exists for %s:%ld", new_break.class_name, opline);
efree((char*)new_break.class_name);
PHPDBG_G(bp_count)--;
return;
}
PHPDBG_BREAK_MAPPING(new_break.id, file_table);
PHPDBG_G(flags) |= PHPDBG_HAS_FILE_OPLINE_BP;
zend_hash_index_update(file_table, opline, &new_break, sizeof(phpdbg_breakopline_t), NULL);
}
PHPDBG_API void phpdbg_set_breakpoint_opcode(const char *name, size_t name_len TSRMLS_DC) /* {{{ */
{
phpdbg_breakop_t new_break;
zend_ulong hash = zend_hash_func(name, name_len);
if (zend_hash_index_exists(&PHPDBG_G(bp)[PHPDBG_BREAK_OPCODE], hash)) {
phpdbg_notice(
"Breakpoint exists for %s", name);
return;
}
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_OPCODE);
new_break.hash = hash;
new_break.name = estrndup(name, name_len);
zend_hash_index_update(&PHPDBG_G(bp)[PHPDBG_BREAK_OPCODE], hash,
&new_break, sizeof(phpdbg_breakop_t), NULL);
PHPDBG_G(flags) |= PHPDBG_HAS_OPCODE_BP;
phpdbg_notice("Breakpoint #%d added at %s", new_break.id, name);
PHPDBG_BREAK_MAPPING(new_break.id, &PHPDBG_G(bp)[PHPDBG_BREAK_OPCODE]);
} /* }}} */
PHPDBG_API 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;
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_OPLINE);
new_break.opline = (zend_ulong) opline;
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);
PHPDBG_BREAK_MAPPING(new_break.id, &PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE]);
}
} /* }}} */
static inline void phpdbg_create_conditional_break(phpdbg_breakcond_t *brake, const phpdbg_param_t *param, const char *expr, size_t expr_len, zend_ulong hash TSRMLS_DC) /* {{{ */
{
phpdbg_breakcond_t new_break;
zend_uint cops = CG(compiler_options);
zval pv;
PHPDBG_BREAK_INIT(new_break, PHPDBG_BREAK_COND);
new_break.hash = hash;
if (param) {
new_break.paramed = 1;
phpdbg_copy_param(
param, &new_break.param TSRMLS_CC);
} else {
new_break.paramed = 0;
}
cops = CG(compiler_options);
CG(compiler_options) = ZEND_COMPILE_DEFAULT_FOR_EVAL;
new_break.code = estrndup(expr, expr_len);
new_break.code_len = expr_len;
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);
zval_dtor(&pv);
if (new_break.ops) {
zend_hash_index_update(
&PHPDBG_G(bp)[PHPDBG_BREAK_COND], hash, &new_break,
sizeof(phpdbg_breakcond_t), (void**)&brake);
phpdbg_notice("Conditional breakpoint #%d added %s/%p",
brake->id, brake->code, brake->ops);
PHPDBG_G(flags) |= PHPDBG_HAS_COND_BP;
PHPDBG_BREAK_MAPPING(new_break.id, &PHPDBG_G(bp)[PHPDBG_BREAK_COND]);
} else {
phpdbg_error(
"Failed to compile code for expression %s", expr);
efree((char*)new_break.code);
PHPDBG_G(bp_count)--;
}
CG(compiler_options) = cops;
} /* }}} */
PHPDBG_API void phpdbg_set_breakpoint_expression(const char *expr, size_t expr_len TSRMLS_DC) /* {{{ */
{
zend_ulong expr_hash = zend_inline_hash_func(expr, expr_len);
phpdbg_breakcond_t new_break;
if (!zend_hash_index_exists(&PHPDBG_G(bp)[PHPDBG_BREAK_COND], expr_hash)) {
phpdbg_create_conditional_break(
&new_break, NULL, expr, expr_len, expr_hash TSRMLS_CC);
} else {
phpdbg_notice("Conditional break %s exists", expr);
}
} /* }}} */
PHPDBG_API void phpdbg_set_breakpoint_at(const phpdbg_param_t *param, const phpdbg_input_t *input TSRMLS_DC) /* {{{ */
{
if (input->argc > 3 && phpdbg_argv_is(2, "if")) {
phpdbg_breakcond_t new_break;
phpdbg_param_t new_param;
zend_ulong expr_hash = 0L;
size_t expr_len;
const char *join = strstr(input->string, "if");
const char *expr = (join) + sizeof("if");
expr_len = strlen(expr);
expr = phpdbg_trim(expr, expr_len, &expr_len);
expr_hash = zend_inline_hash_func(expr, expr_len);
{
/* get a clean parameter from input string */
size_t sparam_len = 0L;
char *sparam = input->string;
sparam[
strstr(input->string, " ") - input->string] = 0;
sparam_len = strlen(sparam);
switch (phpdbg_parse_param(sparam, sparam_len, &new_param TSRMLS_CC)) {
case EMPTY_PARAM:
case NUMERIC_PARAM:
phpdbg_clear_param(
&new_param TSRMLS_CC);
goto usage;
default: { /* do nothing */ } break;
}
expr_hash += phpdbg_hash_param(&new_param TSRMLS_CC);
}
if (!zend_hash_index_exists(&PHPDBG_G(bp)[PHPDBG_BREAK_COND], expr_hash)) {
phpdbg_create_conditional_break(
&new_break, &new_param, expr, expr_len, expr_hash TSRMLS_CC);
} else {
phpdbg_notice(
"Conditional break %s exists at the specified location", expr);
}
phpdbg_clear_param(&new_param TSRMLS_CC);
} else {
usage:
phpdbg_error("usage: break at <func|method|file:line|address> if <expression>");
}
} /* }}} */
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_file(zend_op_array *op_array TSRMLS_DC) /* {{{ */
{
HashTable *breaks;
phpdbg_breakbase_t *brake;
size_t name_len = strlen(op_array->filename);
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_FILE], op_array->filename,
name_len, (void**)&breaks) == FAILURE) {
return NULL;
}
if (zend_hash_index_find(breaks, (*EG(opline_ptr))->lineno, (void**)&brake) == SUCCESS) {
return brake;
}
return NULL;
} /* }}} */
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_symbol(zend_function *fbc TSRMLS_DC) /* {{{ */
{
const char *fname;
zend_op_array *ops;
phpdbg_breakbase_t *brake;
if (fbc->type != ZEND_USER_FUNCTION) {
return NULL;
}
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**)&brake) == SUCCESS) {
return brake;
}
return NULL;
} /* }}} */
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_method(zend_op_array *ops TSRMLS_DC) /* {{{ */
{
HashTable *class_table;
phpdbg_breakbase_t *brake;
if (zend_hash_find(&PHPDBG_G(bp)[PHPDBG_BREAK_METHOD], ops->scope->name,
ops->scope->name_length, (void**)&class_table) == SUCCESS) {
char *lcname = zend_str_tolower_dup(ops->function_name, strlen(ops->function_name));
size_t lcname_len = strlen(lcname);
if (zend_hash_find(
class_table,
lcname,
lcname_len, (void**)&brake) == SUCCESS) {
efree(lcname);
return brake;
}
efree(lcname);
}
return NULL;
} /* }}} */
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_opline(phpdbg_opline_ptr_t opline TSRMLS_DC) /* {{{ */
{
phpdbg_breakline_t *brake;
if (zend_hash_index_find(&PHPDBG_G(bp)[PHPDBG_BREAK_OPLINE],
(zend_ulong) opline, (void**)&brake) == SUCCESS) {
return (brake->base?(phpdbg_breakbase_t *)brake->base:(phpdbg_breakbase_t *)brake);
}
return NULL;
} /* }}} */
static inline phpdbg_breakbase_t *phpdbg_find_breakpoint_opcode(zend_uchar opcode TSRMLS_DC) /* {{{ */
{
phpdbg_breakbase_t *brake;
const char *opname = phpdbg_decode_opcode(opcode);
if (memcmp(opname, PHPDBG_STRL("UNKNOWN")) == 0) {
return NULL;
}
if (zend_hash_index_find(&PHPDBG_G(bp)[PHPDBG_BREAK_OPCODE],
zend_hash_func(opname, strlen(opname)), (void**)&brake) == SUCCESS) {
return brake;
}
return NULL;
} /* }}} */
static inline zend_bool phpdbg_find_breakpoint_param(phpdbg_param_t *param, zend_execute_data *execute_data TSRMLS_DC) /* {{{ */
{
zend_function *function = (zend_function*) execute_data->function_state.function;
switch (param->type) {
case NUMERIC_FUNCTION_PARAM:
case STR_PARAM: {
/* function breakpoint */
if (function->type != ZEND_USER_FUNCTION) {
return 0;
}
{
const char *str = NULL;
size_t len = 0L;
zend_op_array *ops = (zend_op_array*)function;
str = ops->function_name ? ops->function_name : "main";
len = strlen(str);
if (len == param->len && memcmp(param->str, str, len) == SUCCESS) {
return param->type == STR_PARAM || execute_data->opline - ops->opcodes == param->num;
}
}
} break;
case FILE_PARAM: {
if (param->file.line == zend_get_executed_lineno(TSRMLS_C)) {
const char *str = zend_get_executed_filename(TSRMLS_C);
size_t lengths[2] = {strlen(param->file.name), strlen(str)};
if (lengths[0] == lengths[1]) {
return (memcmp(
param->file.name, str, lengths[0]) == SUCCESS);
}
}
} break;
case NUMERIC_METHOD_PARAM:
case METHOD_PARAM: {
if (function->type != ZEND_USER_FUNCTION) {
return 0;
}
{
zend_op_array *ops = (zend_op_array*) function;
if (ops->scope) {
size_t lengths[2] = {strlen(param->method.class), ops->scope->name_length};
if (lengths[0] == lengths[1] && memcmp(param->method.class, ops->scope->name, lengths[0]) == SUCCESS) {
lengths[0] = strlen(param->method.name);
lengths[1] = strlen(ops->function_name);
if (lengths[0] == lengths[1] && memcmp(param->method.name, ops->function_name, lengths[0]) == SUCCESS) {
return param->type == METHOD_PARAM || (execute_data->opline - ops->opcodes) == param->num;
}
}
}
}
} break;
case ADDR_PARAM: {
return ((zend_ulong)(phpdbg_opline_ptr_t)execute_data->opline == param->addr);
} break;
default: {
/* do nothing */
} break;
}
return 0;
} /* }}} */
static inline phpdbg_breakbase_t *phpdbg_find_conditional_breakpoint(zend_execute_data *execute_data TSRMLS_DC) /* {{{ */
{
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);