source: trunk/mod_disassembler/xc_disassembler.c @ 1321

#include "xc_disassembler.h"
#include "xcache.h"
#include "xcache/xc_ini.h"
#include "xcache/xc_utils.h"
#include "xcache/xc_sandbox.h"
#include "xcache/xc_compatibility.h"
#include "xc_processor.h"

#include "ext/standard/info.h"

static void xc_dasm(zval *output, zend_op_array *op_array TSRMLS_DC) /* {{{ */
{
    const Bucket *b;
    zval *zv, *list;
    xc_compile_result_t cr;
    int bufsize = 2;
    char *buf;
    xc_dasm_t dasm;

    xc_compile_result_init_cur(&cr, op_array TSRMLS_CC);

    xc_apply_op_array(&cr, (apply_func_t) xc_undo_pass_two TSRMLS_CC);
    xc_apply_op_array(&cr, (apply_func_t) xc_fix_opcode TSRMLS_CC);

    /* go */
    array_init(output);

    ALLOC_INIT_ZVAL(zv);
    array_init(zv);
    xc_dasm_zend_op_array(&dasm, zv, op_array TSRMLS_CC);
    add_assoc_zval_ex(output, XCACHE_STRS("op_array"), zv);

    buf = emalloc(bufsize);

    ALLOC_INIT_ZVAL(list);
    array_init(list);
    for (b = xc_sandbox_user_function_begin(TSRMLS_C); b; b = b->pListNext) {
        int keysize, keyLength;

        ALLOC_INIT_ZVAL(zv);
        array_init(zv);
        xc_dasm_zend_function(&dasm, zv, b->pData TSRMLS_CC);

        keysize = BUCKET_KEY_SIZE(b) + 2;
        if (keysize > bufsize) {
            do {
                bufsize *= 2;
            } while (keysize > bufsize);
            buf = erealloc(buf, bufsize);
        }
        memcpy(buf, BUCKET_KEY_S(b), keysize);
        buf[keysize - 2] = buf[keysize - 1] = ""[0];
        keyLength = b->nKeyLength;
#ifdef IS_UNICODE
        if (BUCKET_KEY_TYPE(b) == IS_UNICODE) {
            if (buf[0] == ""[0] && buf[1] == ""[0]) {
                keyLength ++;
            }
        } else
#endif
        {
            if (buf[0] == ""[0]) {
                keyLength ++;
            }
        }

        add_u_assoc_zval_ex(list, BUCKET_KEY_TYPE(b), ZSTR(buf), keyLength, zv);
    }
    add_assoc_zval_ex(output, XCACHE_STRS("function_table"), list);
    
    ALLOC_INIT_ZVAL(list);
    array_init(list);
    for (b = xc_sandbox_user_class_begin(TSRMLS_C); b; b = b->pListNext) {
        int keysize, keyLength;

        ALLOC_INIT_ZVAL(zv);
        array_init(zv);
        xc_dasm_zend_class_entry(&dasm, zv, CestToCePtr(*(xc_cest_t *)b->pData) TSRMLS_CC);

        keysize = BUCKET_KEY_SIZE(b) + 2;
        if (keysize > bufsize) {
            do {
                bufsize *= 2;
            } while (keysize > bufsize);
            buf = erealloc(buf, bufsize);
        }
        memcpy(buf, BUCKET_KEY_S(b), keysize);
        buf[keysize - 2] = buf[keysize - 1] = ""[0];
        keyLength = b->nKeyLength;
#ifdef IS_UNICODE
        if (BUCKET_KEY_TYPE(b) == IS_UNICODE) {
            if (buf[0] == ""[0] && buf[1] == ""[0]) {
                keyLength ++;
            }
        } else
#endif
        {
            if (buf[0] == ""[0]) {
                keyLength ++;
            }
        }
        add_u_assoc_zval_ex(list, BUCKET_KEY_TYPE(b), ZSTR(buf), keyLength, zv);
    }
    efree(buf);
    add_assoc_zval_ex(output, XCACHE_STRS("class_table"), list);

    /*xc_apply_op_array(&cr, (apply_func_t) xc_redo_pass_two TSRMLS_CC);*/
    xc_compile_result_free(&cr);
}
/* }}} */
typedef struct xc_dasm_sandboxed_t { /* {{{ */
    enum Type {
        xc_dasm_file_t
        , xc_dasm_string_t
    } type;
    union {
        zval *zfilename;
        struct {
            zval *source;
            char *eval_name;
        } compile_string;
    } input;

    zval *output;
} xc_dasm_sandboxed_t; /* }}} */
zend_op_array *xc_dasm_sandboxed(void *data TSRMLS_DC) /* {{{ */
{
    zend_bool catched = 0;
    zend_op_array *op_array = NULL;
    xc_dasm_sandboxed_t *sandboxed_dasm = (xc_dasm_sandboxed_t *) data;

    zend_try {
        if (sandboxed_dasm->type == xc_dasm_file_t) {
            op_array = compile_filename(ZEND_REQUIRE, sandboxed_dasm->input.zfilename TSRMLS_CC);
        }
        else {
            op_array = compile_string(sandboxed_dasm->input.compile_string.source, sandboxed_dasm->input.compile_string.eval_name TSRMLS_CC);
        }
    } zend_catch {
        catched = 1;
    } zend_end_try();

    if (catched || !op_array) {
#define return_value sandboxed_dasm->output
        RETVAL_FALSE;
#undef return_value
        return NULL;
    }

    xc_dasm(sandboxed_dasm->output, op_array TSRMLS_CC);

    /* free */
#ifdef ZEND_ENGINE_2
    destroy_op_array(op_array TSRMLS_CC);
#else
    destroy_op_array(op_array);
#endif
    efree(op_array);

    return NULL;
} /* }}} */
void xc_dasm_string(zval *output, zval *source TSRMLS_DC) /* {{{ */
{
    xc_dasm_sandboxed_t sandboxed_dasm;
    char *eval_name = zend_make_compiled_string_description("runtime-created function" TSRMLS_CC);

    sandboxed_dasm.output = output;
    sandboxed_dasm.type = xc_dasm_string_t;
    sandboxed_dasm.input.compile_string.source = source;
    sandboxed_dasm.input.compile_string.eval_name = eval_name;
    xc_sandbox(&xc_dasm_sandboxed, (void *) &sandboxed_dasm, eval_name TSRMLS_CC);
    efree(eval_name);
}
/* }}} */
void xc_dasm_file(zval *output, const char *filename TSRMLS_DC) /* {{{ */
{
    zval *zfilename;
    xc_dasm_sandboxed_t sandboxed_dasm;

    MAKE_STD_ZVAL(zfilename);
    zfilename->value.str.val = estrdup(filename);
    zfilename->value.str.len = strlen(filename);
    zfilename->type = IS_STRING;

    sandboxed_dasm.output = output;
    sandboxed_dasm.type = xc_dasm_file_t;
    sandboxed_dasm.input.zfilename = zfilename;
    xc_sandbox(&xc_dasm_sandboxed, (void *) &sandboxed_dasm, zfilename->value.str.val TSRMLS_CC);

    zval_dtor(zfilename);
    FREE_ZVAL(zfilename);
}
/* }}} */

/* {{{ proto array xcache_dasm_file(string filename)
   Disassemble file into opcode array by filename */
PHP_FUNCTION(xcache_dasm_file)
{
    char *filename;
    int filename_len;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &filename, &filename_len) == FAILURE) {
        return;
    }
    if (!filename_len) RETURN_FALSE;

    xc_dasm_file(return_value, filename TSRMLS_CC);
}
/* }}} */
/* {{{ proto array xcache_dasm_string(string code)
   Disassemble php code into opcode array */
PHP_FUNCTION(xcache_dasm_string)
{
    zval *code;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &code) == FAILURE) {
        return;
    }
    xc_dasm_string(return_value, code TSRMLS_CC);
}
/* }}} */

/* {{{ PHP_MINFO_FUNCTION(xcache_disassembler) */
static PHP_MINFO_FUNCTION(xcache_disassembler)
{
    php_info_print_table_start();
    php_info_print_table_row(2, "XCache Disassembler Module", "enabled");
    php_info_print_table_end();

    DISPLAY_INI_ENTRIES();
}
/* }}} */
static zend_function_entry xcache_disassembler_functions[] = /* {{{ */
{
    PHP_FE(xcache_dasm_file,         NULL)
    PHP_FE(xcache_dasm_string,       NULL)
    PHP_FE_END
};
/* }}} */
static zend_module_entry xcache_disassembler_module_entry = { /* {{{ */
    STANDARD_MODULE_HEADER,
    XCACHE_NAME " Disassembler",
    xcache_disassembler_functions,
    NULL,
    NULL,
    NULL,
    NULL,
    PHP_MINFO(xcache_disassembler),
    XCACHE_VERSION,
#ifdef PHP_GINIT
    NO_MODULE_GLOBALS,
#endif
#ifdef ZEND_ENGINE_2
    NULL,
#else
    NULL,
    NULL,
#endif
    STANDARD_MODULE_PROPERTIES_EX
};
/* }}} */
int xc_disassembler_startup_module() /* {{{ */
{
    return zend_startup_module(&xcache_disassembler_module_entry);
}
/* }}} */