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/*
* talloc_report into a string
*
* Copyright Volker Lendecke <vl@samba.org> 2015
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "replace.h"
#include "talloc_report.h"
/*
* talloc_vasprintf into a buffer that doubles its size. The real string
* length is maintained in "pstr_len".
*/
static char *talloc_vasprintf_append_largebuf(char *buf, ssize_t *pstr_len,
const char *fmt, va_list ap)
PRINTF_ATTRIBUTE(3,0);
static char *talloc_vasprintf_append_largebuf(char *buf, ssize_t *pstr_len,
const char *fmt, va_list ap)
{
ssize_t str_len = *pstr_len;
size_t buflen, needed, space = 0;
char *start = NULL, *tmpbuf = NULL;
va_list ap2;
int printlen;
if (str_len == -1) {
return NULL;
}
if (buf == NULL) {
return NULL;
}
if (fmt == NULL) {
return NULL;
}
buflen = talloc_get_size(buf);
if (buflen > (size_t)str_len) {
start = buf + str_len;
space = buflen - str_len;
} else {
return NULL;
}
va_copy(ap2, ap);
printlen = vsnprintf(start, space, fmt, ap2);
va_end(ap2);
if (printlen < 0) {
goto fail;
}
needed = str_len + printlen + 1;
if (needed > buflen) {
buflen = MAX(128, buflen);
while (buflen < needed) {
buflen *= 2;
}
tmpbuf = talloc_realloc(NULL, buf, char, buflen);
if (tmpbuf == NULL) {
goto fail;
}
buf = tmpbuf;
va_copy(ap2, ap);
vsnprintf(buf + str_len, buflen - str_len, fmt, ap2);
va_end(ap2);
}
*pstr_len = (needed - 1);
return buf;
fail:
*pstr_len = -1;
return buf;
}
static char *talloc_asprintf_append_largebuf(char *buf, ssize_t *pstr_len,
const char *fmt, ...)
PRINTF_ATTRIBUTE(3,4);
static char *talloc_asprintf_append_largebuf(char *buf, ssize_t *pstr_len,
const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
buf = talloc_vasprintf_append_largebuf(buf, pstr_len, fmt, ap);
va_end(ap);
return buf;
}
struct talloc_report_str_state {
ssize_t str_len;
char *s;
};
static void talloc_report_str_helper(const void *ptr, int depth, int max_depth,
int is_ref, void *private_data)
{
struct talloc_report_str_state *state = private_data;
const char *name = talloc_get_name(ptr);
if (ptr == state->s) {
return;
}
if (is_ref) {
state->s = talloc_asprintf_append_largebuf(
state->s, &state->str_len,
"%*sreference to: %s\n", depth*4, "", name);
return;
}
if (depth == 0) {
state->s = talloc_asprintf_append_largebuf(
state->s, &state->str_len,
"%stalloc report on '%s' "
"(total %6lu bytes in %3lu blocks)\n",
(max_depth < 0 ? "full " :""), name,
(unsigned long)talloc_total_size(ptr),
(unsigned long)talloc_total_blocks(ptr));
return;
}
if (strcmp(name, "char") == 0) {
/*
* Print out the first 50 bytes of the string
*/
state->s = talloc_asprintf_append_largebuf(
state->s, &state->str_len,
"%*s%-30s contains %6lu bytes in %3lu blocks "
"(ref %zu): %*s\n", depth*4, "", name,
(unsigned long)talloc_total_size(ptr),
(unsigned long)talloc_total_blocks(ptr),
talloc_reference_count(ptr),
(int)MIN(50, talloc_get_size(ptr)),
(const char *)ptr);
return;
}
state->s = talloc_asprintf_append_largebuf(
state->s, &state->str_len,
"%*s%-30s contains %6lu bytes in %3lu blocks (ref %zu) %p\n",
depth*4, "", name,
(unsigned long)talloc_total_size(ptr),
(unsigned long)talloc_total_blocks(ptr),
talloc_reference_count(ptr), ptr);
}
char *talloc_report_str(TALLOC_CTX *mem_ctx, TALLOC_CTX *root)
{
struct talloc_report_str_state state;
state.s = talloc_strdup(mem_ctx, "");
if (state.s == NULL) {
return NULL;
}
state.str_len = 0;
talloc_report_depth_cb(root, 0, -1, talloc_report_str_helper, &state);
if (state.str_len == -1) {
talloc_free(state.s);
return NULL;
}
return talloc_realloc(mem_ctx, state.s, char, state.str_len+1);
}
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