#include "phpdbg.h"
#include "phpdbg_cmd.h"
#include "phpdbg_utils.h"
#include "phpdbg_set.h"
#include "phpdbg_prompt.h"
ZEND_EXTERN_MODULE_GLOBALS(phpdbg);
static inline const char *phpdbg_command_name(const phpdbg_command_t *command, char *buffer) {
size_t pos = 0;
if (command->parent) {
memcpy(&buffer[pos], command->parent->name, command->parent->name_len);
pos += command->parent->name_len;
memcpy(&buffer[pos], " ", sizeof(" ")-1);
pos += (sizeof(" ")-1);
}
memcpy(&buffer[pos], command->name, command->name_len);
pos += command->name_len;
buffer[pos] = 0;
return buffer;
}
PHPDBG_API const char *phpdbg_get_param_type(const phpdbg_param_t *param TSRMLS_DC)
{
switch (param->type) {
case STACK_PARAM:
return "stack";
case EMPTY_PARAM:
return "empty";
case ADDR_PARAM:
return "address";
case NUMERIC_PARAM:
return "numeric";
case METHOD_PARAM:
return "method";
case NUMERIC_FUNCTION_PARAM:
return "function opline";
case NUMERIC_METHOD_PARAM:
return "method opline";
case FILE_PARAM:
return "file or file opline";
case STR_PARAM:
return "string";
default:
return "unknown";
}
}
PHPDBG_API void phpdbg_clear_param(phpdbg_param_t *param TSRMLS_DC)
{
if (param) {
switch (param->type) {
case FILE_PARAM:
efree(param->file.name);
break;
case METHOD_PARAM:
efree(param->method.class);
efree(param->method.name);
break;
case STR_PARAM:
efree(param->str);
break;
default:
break;
}
}
}
PHPDBG_API char* phpdbg_param_tostring(const phpdbg_param_t *param, char **pointer TSRMLS_DC)
{
switch (param->type) {
case STR_PARAM:
asprintf(pointer,
"%s", param->str);
break;
case ADDR_PARAM:
asprintf(pointer,
"%#lx", param->addr);
break;
case NUMERIC_PARAM:
asprintf(pointer,
"%li",
param->num);
break;
case METHOD_PARAM:
asprintf(pointer,
"%s::%s",
param->method.class,
param->method.name);
break;
case FILE_PARAM:
if (param->num) {
asprintf(pointer,
"%s:%lu#%lu",
param->file.name,
param->file.line,
param->num);
} else {
asprintf(pointer,
"%s:%lu",
param->file.name,
param->file.line);
}
break;
case NUMERIC_FUNCTION_PARAM:
asprintf(pointer,
"%s#%lu", param->str, param->num);
break;
case NUMERIC_METHOD_PARAM:
asprintf(pointer,
"%s::%s#%lu",
param->method.class,
param->method.name,
param->num);
break;
default:
asprintf(pointer,
"%s", "unknown");
}
return *pointer;
}
PHPDBG_API void phpdbg_copy_param(const phpdbg_param_t* src, phpdbg_param_t* dest TSRMLS_DC)
{
switch ((dest->type = src->type)) {
case STACK_PARAM:
break;
case STR_PARAM:
dest->str = estrndup(src->str, src->len);
dest->len = src->len;
break;
case OP_PARAM:
dest->str = estrndup(src->str, src->len);
dest->len = src->len;
break;
case ADDR_PARAM:
dest->addr = src->addr;
break;
case NUMERIC_PARAM:
dest->num = src->num;
break;
case METHOD_PARAM:
dest->method.class = estrdup(src->method.class);
dest->method.name = estrdup(src->method.name);
break;
case NUMERIC_FILE_PARAM:
case FILE_PARAM:
dest->file.name = estrdup(src->file.name);
dest->file.line = src->file.line;
if (src->num)
dest->num = src->num;
break;
case NUMERIC_FUNCTION_PARAM:
dest->str = estrndup(src->str, src->len);
dest->num = src->num;
dest->len = src->len;
break;
case NUMERIC_METHOD_PARAM:
dest->method.class = estrdup(src->method.class);
dest->method.name = estrdup(src->method.name);
dest->num = src->num;
break;
case EMPTY_PARAM: { } break;
default: {
}
}
}
PHPDBG_API zend_ulong phpdbg_hash_param(const phpdbg_param_t *param TSRMLS_DC)
{
zend_ulong hash = param->type;
switch (param->type) {
case STACK_PARAM:
break;
case STR_PARAM:
hash += zend_inline_hash_func(param->str, param->len);
break;
case METHOD_PARAM:
hash += zend_inline_hash_func(param->method.class, strlen(param->method.class));
hash += zend_inline_hash_func(param->method.name, strlen(param->method.name));
break;
case FILE_PARAM:
hash += zend_inline_hash_func(param->file.name, strlen(param->file.name));
hash += param->file.line;
if (param->num)
hash += param->num;
break;
case ADDR_PARAM:
hash += param->addr;
break;
case NUMERIC_PARAM:
hash += param->num;
break;
case NUMERIC_FUNCTION_PARAM:
hash += zend_inline_hash_func(param->str, param->len);
hash += param->num;
break;
case NUMERIC_METHOD_PARAM:
hash += zend_inline_hash_func(param->method.class, strlen(param->method.class));
hash += zend_inline_hash_func(param->method.name, strlen(param->method.name));
if (param->num)
hash+= param->num;
break;
case EMPTY_PARAM: { } break;
default: {
}
}
return hash;
}
PHPDBG_API zend_bool phpdbg_match_param(const phpdbg_param_t *l, const phpdbg_param_t *r TSRMLS_DC)
{
if (l && r) {
if (l->type == r->type) {
switch (l->type) {
case STACK_PARAM:
return 1;
break;
case NUMERIC_FUNCTION_PARAM:
if (l->num != r->num) {
break;
}
case STR_PARAM:
return (l->len == r->len) &&
(memcmp(l->str, r->str, l->len) == SUCCESS);
case NUMERIC_PARAM:
return (l->num == r->num);
case ADDR_PARAM:
return (l->addr == r->addr);
case FILE_PARAM: {
if (l->file.line == r->file.line) {
size_t lengths[2] = {
strlen(l->file.name), strlen(r->file.name)};
if (lengths[0] == lengths[1]) {
if ((!l->num && !r->num) || (l->num == r->num)) {
return (memcmp(
l->file.name, r->file.name, lengths[0]) == SUCCESS);
}
}
}
} break;
case NUMERIC_METHOD_PARAM:
if (l->num != r->num) {
break;
}
case METHOD_PARAM: {
size_t lengths[2] = {
strlen(l->method.class), strlen(r->method.class)};
if (lengths[0] == lengths[1]) {
if (memcmp(l->method.class, r->method.class, lengths[0]) == SUCCESS) {
lengths[0] = strlen(l->method.name);
lengths[1] = strlen(r->method.name);
if (lengths[0] == lengths[1]) {
return (memcmp(
l->method.name, r->method.name, lengths[0]) == SUCCESS);
}
}
}
} break;
case EMPTY_PARAM:
return 1;
default: {
}
}
}
}
return 0;
}
PHPDBG_API void phpdbg_param_debug(const phpdbg_param_t *param, const char *msg) {
if (param && param->type) {
switch (param->type) {
case STR_PARAM:
fprintf(stderr, "%s STR_PARAM(%s=%lu)\n", msg, param->str, param->len);
break;
case ADDR_PARAM:
fprintf(stderr, "%s ADDR_PARAM(%lu)\n", msg, param->addr);
break;
case NUMERIC_FILE_PARAM:
fprintf(stderr, "%s NUMERIC_FILE_PARAM(%s:#%lu)\n", msg, param->file.name, param->file.line);
break;
case FILE_PARAM:
fprintf(stderr, "%s FILE_PARAM(%s:%lu)\n", msg, param->file.name, param->file.line);
break;
case METHOD_PARAM:
fprintf(stderr, "%s METHOD_PARAM(%s::%s)\n", msg, param->method.class, param->method.name);
break;
case NUMERIC_METHOD_PARAM:
fprintf(stderr, "%s NUMERIC_METHOD_PARAM(%s::%s)\n", msg, param->method.class, param->method.name);
break;
case NUMERIC_FUNCTION_PARAM:
fprintf(stderr, "%s NUMERIC_FUNCTION_PARAM(%s::%ld)\n", msg, param->str, param->num);
break;
case NUMERIC_PARAM:
fprintf(stderr, "%s NUMERIC_PARAM(%ld)\n", msg, param->num);
break;
case COND_PARAM:
fprintf(stderr, "%s COND_PARAM(%s=%lu)\n", msg, param->str, param->len);
break;
case OP_PARAM:
fprintf(stderr, "%s OP_PARAM(%s=%lu)\n", msg, param->str, param->len);
break;
default: {
}
}
}
}
PHPDBG_API void phpdbg_stack_free(phpdbg_param_t *stack) {
if (stack && stack->next) {
phpdbg_param_t *remove = stack->next;
while (remove) {
phpdbg_param_t *next = NULL;
if (remove->next)
next = remove->next;
switch (remove->type) {
case NUMERIC_METHOD_PARAM:
case METHOD_PARAM:
if (remove->method.class)
free(remove->method.class);
if (remove->method.name)
free(remove->method.name);
break;
case NUMERIC_FUNCTION_PARAM:
case STR_PARAM:
case OP_PARAM:
if (remove->str)
free(remove->str);
break;
case NUMERIC_FILE_PARAM:
case FILE_PARAM:
if (remove->file.name)
free(remove->file.name);
break;
default: {
}
}
free(remove);
remove = NULL;
if (next)
remove = next;
else break;
}
}
stack->next = NULL;
}
PHPDBG_API void phpdbg_stack_push(phpdbg_param_t *stack, phpdbg_param_t *param) {
phpdbg_param_t *next = calloc(1, sizeof(phpdbg_param_t));
if (!next)
return;
*(next) = *(param);
next->next = NULL;
if (stack->top == NULL) {
stack->top = next;
next->top = NULL;
stack->next = next;
} else {
stack->top->next = next;
next->top = stack->top;
stack->top = next;
}
stack->len++;
}
PHPDBG_API int phpdbg_stack_verify(const phpdbg_command_t *command, phpdbg_param_t **stack, char **why TSRMLS_DC) {
if (command) {
char buffer[128] = {0,};
const phpdbg_param_t *top = (stack != NULL) ? *stack : NULL;
const char *arg = command->args;
size_t least = 0L,
received = 0L,
current = 0L;
zend_bool optional = 0;
if (!(arg) || !(*arg)) {
if (!top) {
return SUCCESS;
}
asprintf(why,
"The command \"%s\" expected no arguments",
phpdbg_command_name(command, buffer));
return FAILURE;
}
least = 0L;
while (arg && *arg) {
if (arg[0] == '|') {
break;
}
least++;
arg++;
}
arg = command->args;
#define verify_arg(e, a, t) if (!(a)) { \
if (!optional) { \
asprintf(why, \
"The command \"%s\" expected %s and got nothing at parameter %lu", \
phpdbg_command_name(command, buffer), \
(e), \
current); \
return FAILURE;\
} \
} else if ((a)->type != (t)) { \
asprintf(why, \
"The command \"%s\" expected %s and got %s at parameter %lu", \
phpdbg_command_name(command, buffer), \
(e),\
phpdbg_get_param_type((a) TSRMLS_CC), \
current); \
return FAILURE; \
}
while (arg && *arg) {
current++;
switch (*arg) {
case '|': {
current--;
optional = 1;
arg++;
} continue;
case 'i': verify_arg("raw input", top, STR_PARAM); break;
case 's': verify_arg("string", top, STR_PARAM); break;
case 'n': verify_arg("number", top, NUMERIC_PARAM); break;
case 'm': verify_arg("method", top, METHOD_PARAM); break;
case 'a': verify_arg("address", top, ADDR_PARAM); break;
case 'f': verify_arg("file:line", top, FILE_PARAM); break;
case 'c': verify_arg("condition", top, COND_PARAM); break;
case 'o': verify_arg("opcode", top, OP_PARAM); break;
case 'b': verify_arg("boolean", top, NUMERIC_PARAM); break;
case '*': { } break;
}
if (top ) {
top = top->next;
} else break;
received++;
arg++;
}
#undef verify_arg
if ((received < least)) {
asprintf(why,
"The command \"%s\" expected at least %lu arguments (%s) and received %lu",
phpdbg_command_name(command, buffer),
least,
command->args,
received);
return FAILURE;
}
}
return SUCCESS;
}
PHPDBG_API const phpdbg_command_t* phpdbg_stack_resolve(const phpdbg_command_t *commands, const phpdbg_command_t *parent, phpdbg_param_t **top, char **why) {
const phpdbg_command_t *command = commands;
phpdbg_param_t *name = *top;
const phpdbg_command_t *matched[3] = {NULL, NULL, NULL};
ulong matches = 0L;
while (command && command->name && command->handler) {
if ((name->len == 1) || (command->name_len >= name->len)) {
if (command->alias && (name->len == 1)) {
if (command->alias == (*name->str)) {
matched[matches] = command;
matches++;
}
} else {
if (strncasecmp(command->name, name->str, name->len) == SUCCESS) {
if (matches < 3) {
if (((name->len != command->name_len) && command->alias) ||
(name->len == command->name_len)) {
matched[matches] = command;
matches++;
}
if (name->len == command->name_len)
break;
} else break;
}
}
}
command++;
}
switch (matches) {
case 0: {
if (parent) {
asprintf(
why,
"The command \"%s %s\" could not be found",
parent->name, name->str);
} else asprintf(
why,
"The command \"%s\" could not be found",
name->str);
} return parent;
case 1: {
(*top) = (*top)->next;
command = matched[0];
} break;
default: {
char *list = NULL;
zend_uint it = 0;
size_t pos = 0;
while (it < matches) {
if (!list) {
list = malloc(
matched[it]->name_len + 1 +
((it+1) < matches ? sizeof(", ")-1 : 0));
} else {
list = realloc(list,
(pos + matched[it]->name_len) + 1 +
((it+1) < matches ? sizeof(", ")-1 : 0));
}
memcpy(&list[pos], matched[it]->name, matched[it]->name_len);
pos += matched[it]->name_len;
if ((it+1) < matches) {
memcpy(&list[pos], ", ", sizeof(", ")-1);
pos += (sizeof(", ") - 1);
}
list[pos] = 0;
it++;
}
asprintf(
why,
"The command \"%s\" is ambigious, matching %lu commands (%s)",
name->str, matches, list);
free(list);
} return NULL;
}
if (command->subs && (*top) && ((*top)->type == STR_PARAM)) {
return phpdbg_stack_resolve(command->subs, command, top, why);
} else {
return command;
}
return NULL;
}
PHPDBG_API int phpdbg_stack_execute(phpdbg_param_t *stack, char **why TSRMLS_DC) {
phpdbg_param_t *top = NULL;
const phpdbg_command_t *handler = NULL;
if (stack->type != STACK_PARAM) {
asprintf(
why, "The passed argument was not a stack !!");
return FAILURE;
}
if (!stack->len) {
asprintf(
why, "The stack contains nothing !!");
return FAILURE;
}
top = (phpdbg_param_t*) stack->next;
switch (top->type) {
case EVAL_PARAM:
return PHPDBG_COMMAND_HANDLER(ev)(top TSRMLS_CC);
case RUN_PARAM:
return PHPDBG_COMMAND_HANDLER(run)(top TSRMLS_CC);
case SHELL_PARAM:
return PHPDBG_COMMAND_HANDLER(sh)(top TSRMLS_CC);
case STR_PARAM: {
handler = phpdbg_stack_resolve(
phpdbg_prompt_commands, NULL, &top, why);
if (handler) {
if (phpdbg_stack_verify(handler, &top, why TSRMLS_CC) == SUCCESS) {
return handler->handler(top TSRMLS_CC);
}
}
} return FAILURE;
default:
asprintf(
why, "The first parameter makes no sense !!");
return FAILURE;
}
return SUCCESS;
}
PHPDBG_API char* phpdbg_read_input(char *buffered TSRMLS_DC)
{
char *cmd = NULL;
#if !defined(HAVE_LIBREADLINE) && !defined(HAVE_LIBEDIT)
char buf[PHPDBG_MAX_CMD];
#endif
char *buffer = NULL;
if (!(PHPDBG_G(flags) & PHPDBG_IS_QUITTING)) {
if ((PHPDBG_G(flags) & PHPDBG_IS_REMOTE) &&
(buffered == NULL)) {
fflush(PHPDBG_G(io)[PHPDBG_STDOUT]);
}
if (buffered == NULL) {
disconnect:
if (0) {
PHPDBG_G(flags) |= (PHPDBG_IS_QUITTING|PHPDBG_IS_DISCONNECTED);
zend_bailout();
return NULL;
}
#if !defined(HAVE_LIBREADLINE) && !defined(HAVE_LIBEDIT)
if (!(PHPDBG_G(flags) & PHPDBG_IS_REMOTE)) {
if (!phpdbg_write("%s", phpdbg_get_prompt(TSRMLS_C))) {
goto disconnect;
}
}
readline:
if (!fgets(buf, PHPDBG_MAX_CMD, PHPDBG_G(io)[PHPDBG_STDIN])) {
if ((PHPDBG_G(flags) & PHPDBG_IS_REMOTE)) {
goto disconnect;
} else goto readline;
}
cmd = buf;
#else
readline:
if ((PHPDBG_G(flags) & PHPDBG_IS_REMOTE)) {
char buf[PHPDBG_MAX_CMD];
if (fgets(buf, PHPDBG_MAX_CMD, PHPDBG_G(io)[PHPDBG_STDIN])) {
cmd = buf;
} else goto disconnect;
} else cmd = readline(phpdbg_get_prompt(TSRMLS_C));
if (!cmd) {
goto readline;
}
if (!(PHPDBG_G(flags) & PHPDBG_IS_REMOTE)) {
add_history(cmd);
}
#endif
} else cmd = buffered;
buffer = estrdup(cmd);
#if defined(HAVE_LIBREADLINE) || defined(HAVE_LIBEDIT)
if (!buffered && cmd &&
!(PHPDBG_G(flags) & PHPDBG_IS_REMOTE)) {
free(cmd);
}
#endif
}
if (buffer && isspace(*buffer)) {
char *trimmed = buffer;
while (isspace(*trimmed))
trimmed++;
trimmed = estrdup(trimmed);
efree(buffer);
buffer = trimmed;
}
if (buffer && strlen(buffer)) {
if (PHPDBG_G(buffer)) {
efree(PHPDBG_G(buffer));
}
PHPDBG_G(buffer) = estrdup(buffer);
} else {
if (PHPDBG_G(buffer)) {
buffer = estrdup(PHPDBG_G(buffer));
}
}
return buffer;
}
PHPDBG_API void phpdbg_destroy_input(char **input TSRMLS_DC)
{
efree(*input);
}