mdb_v8_cfg.c

/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

/*
 * mdb_v8_cfg.c: canned configurations for previous V8 versions.
 *
 * The functions and data defined here enable this dmod to support debugging
 * io.js binaries that predated V8's built-in postmortem debugging support.
 */

#include "v8cfg.h"

/*ARGSUSED*/
static int
v8cfg_target_iter(v8_cfg_t *cfgp, int (*func)(mdb_symbol_t *, void *),
    void *arg)
{
	return (mdb_symbol_iter(MDB_OBJ_EVERY, MDB_DYNSYM,
	    MDB_BIND_GLOBAL | MDB_TYPE_OBJECT | MDB_TYPE_FUNC,
	    func, arg));
}

/*ARGSUSED*/
static int
v8cfg_target_readsym(v8_cfg_t *cfgp, const char *name, intptr_t *valp)
{
	int val, rval;

	if ((rval = mdb_readsym(&val, sizeof (val), name)) != -1)
		*valp = (intptr_t)val;

	return (rval);
}

/*
 * Analog of mdb_symbol_iter() for a canned configuration.
 */
static int
v8cfg_canned_iter(v8_cfg_t *cfgp, int (*func)(mdb_symbol_t *, void *),
    void *arg)
{
	v8_cfg_symbol_t *v8sym;
	mdb_symbol_t mdbsym;
	int rv;

	for (v8sym = cfgp->v8cfg_symbols; v8sym->v8cs_name != NULL; v8sym++) {
		mdbsym.sym_name = v8sym->v8cs_name;
		mdbsym.sym_object = NULL;
		mdbsym.sym_sym = NULL;
		mdbsym.sym_table = 0;
		mdbsym.sym_id = 0;

		if ((rv = func(&mdbsym, arg)) != 0)
			return (rv);
	}

	return (0);
}

/*
 * Analog of mdb_readsym() for a canned configuration.
 */
static int
v8cfg_canned_readsym(v8_cfg_t *cfgp, const char *name, intptr_t *valp)
{
	v8_cfg_symbol_t *v8sym;

	for (v8sym = cfgp->v8cfg_symbols; v8sym->v8cs_name != NULL; v8sym++) {
		if (strcmp(name, v8sym->v8cs_name) == 0)
			break;
	}

	if (v8sym->v8cs_name == NULL)
		return (-1);

	*valp = v8sym->v8cs_value;
	return (0);
}

/*
 * Canned configuration for the V8 bundled with io.js v0.4.8 and later.
 */
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/*
 * Canned configuration for the V8 bundled with io.js v0.6.5.
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