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#include <stdio.h>
#include <string.h>
#include "php.h"
#include "zend_extensions.h"
#define MINI_XDEBUG_CMD_END -1
#define MINI_XDEBUG_CMD_INVALID 0
#define MINI_XDEBUG_CMD_NEXT 1
static int g_is_first_statement;
static int g_do_next_cmd;
static int g_next_call_depth;
static void mini_xdebug_activate(void) {
CG(compiler_options) |= ZEND_COMPILE_EXTENDED_STMT;
g_is_first_statement = 1;
g_do_next_cmd = 0;
g_next_call_depth = 0;
}
static int get_call_depth(void) {
int depth = 0;
zend_execute_data* ex = EG(current_execute_data);
while (ex) {
depth++;
ex = ex->prev_execute_data;
}
return depth;
}
static void show_context(const char* filename, int lineno) {
FILE* fp = fopen(filename, "r");
if (!fp) {
return;
}
char buf[1024];
int n = 0;
while (fgets(buf, sizeof(buf), fp)) {
n++;
if (lineno - 1 <= n && n <= lineno + 1) {
fprintf(stdout, "%s %3d | %s", n == lineno ? ">" : " ", n, buf);
}
if (n > lineno + 1) {
break;
}
}
fclose(fp);
}
static void show_prompt(void) {
fprintf(stdout, "(mini-xdebug) ");
fflush(stdout);
}
static int query_command(char* buf) {
if (!fgets(buf, sizeof(buf), stdin)) {
return MINI_XDEBUG_CMD_END;
}
buf[strcspn(buf, "\n")] = '\0';
return (!strcmp(buf, "next") || !strcmp(buf, "n"))
? MINI_XDEBUG_CMD_NEXT
: MINI_XDEBUG_CMD_INVALID;
}
static void mini_xdebug_statement_handler(zend_execute_data* frame) {
if (!g_is_first_statement && !g_do_next_cmd) {
return;
}
uint32_t lineno = EG(current_execute_data)->opline->lineno;
const char* filename = ZSTR_VAL(frame->func->op_array.filename);
int depth = get_call_depth();
if (g_is_first_statement) {
g_is_first_statement = 0;
} else if (g_do_next_cmd) {
if (depth > g_next_call_depth) {
return;
}
g_do_next_cmd = 0;
}
fprintf(stdout, "\n%s:%d\n", filename, lineno);
show_context(filename, lineno);
char command_buf[256];
for (;;) {
show_prompt();
int cmd = query_command(command_buf);
if (cmd == MINI_XDEBUG_CMD_NEXT) {
g_do_next_cmd = 1;
g_next_call_depth = depth;
break;
} else if (cmd == MINI_XDEBUG_CMD_END) {
break;
} else {
fprintf(stdout, "Available commands: next (n)\n");
}
}
}
#ifndef ZEND_EXT_API
#define ZEND_EXT_API ZEND_DLEXPORT
#endif
ZEND_EXT_API zend_extension_version_info extension_version_info = {
ZEND_EXTENSION_API_NO,
(char*)ZEND_EXTENSION_BUILD_ID,
};
ZEND_DLEXPORT zend_extension zend_extension_entry = {
"mini-xdebug", /* name */
"0.1.0", /* version */
"nsfisis", /* author */
"", /* URL */
"", /* copyright */
NULL, /* startup */
NULL, /* shutdown */
mini_xdebug_activate, /* activate */
NULL, /* deactivate */
NULL, /* message_handler */
NULL, /* op_array_handler */
mini_xdebug_statement_handler, /* statement_handler */
NULL, /* fcall_begin_handler */
NULL, /* fcall_end_handler */
NULL, /* op_array_ctor */
NULL, /* op_array_dtor */
STANDARD_ZEND_EXTENSION_PROPERTIES,
};
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