/*
- * Copyright (C) 2013 Paul Woegerer <paul.woegerer@mentor.com>
- * Copyright (C) 2015 Antoine Busque <abusque@efficios.com>
+ * SPDX-License-Identifier: LGPL-2.1-only
*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; version 2.1 of
- * the License.
- *
- * This library 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
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * Copyright (C) 2013 Paul Woegerer <paul.woegerer@mentor.com>
+ * Copyright (C) 2015 Antoine Busque <abusque@efficios.com>
+ * Copyright (C) 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
#define _LGPL_SOURCE
-#define _GNU_SOURCE
-
#include <limits.h>
#include <stdio.h>
+#include <stdint.h>
#include <sys/types.h>
#include <unistd.h>
#include <lttng/ust-dlfcn.h>
#include <lttng/ust-elf.h>
+#include <lttng/ust-events.h>
+#include <helper.h>
#include "usterr-signal-safe.h"
/* Include link.h last else it conflicts with ust-dlfcn. */
#define TRACEPOINT_DEFINE
#include "ust_dl.h"
-static void *(*__lttng_ust_plibc_dlopen)(const char *filename, int flag);
+static void *(*__lttng_ust_plibc_dlopen)(const char *filename, int flags);
+#ifdef HAVE_DLMOPEN
+static void *(*__lttng_ust_plibc_dlmopen)(Lmid_t nsid, const char *filename,
+ int flags);
+#endif
static int (*__lttng_ust_plibc_dlclose)(void *handle);
static
-void *_lttng_ust_dl_libc_dlopen(const char *filename, int flag)
+void *_lttng_ust_dl_libc_dlopen(const char *filename, int flags)
{
if (!__lttng_ust_plibc_dlopen) {
__lttng_ust_plibc_dlopen = dlsym(RTLD_NEXT, "dlopen");
return NULL;
}
}
- return __lttng_ust_plibc_dlopen(filename, flag);
+ return __lttng_ust_plibc_dlopen(filename, flags);
+}
+
+#ifdef HAVE_DLMOPEN
+static
+void *_lttng_ust_dl_libc_dlmopen(Lmid_t nsid, const char *filename,
+ int flags)
+{
+ if (!__lttng_ust_plibc_dlmopen) {
+ __lttng_ust_plibc_dlmopen = dlsym(RTLD_NEXT, "dlmopen");
+ if (!__lttng_ust_plibc_dlmopen) {
+ fprintf(stderr, "%s\n", dlerror());
+ return NULL;
+ }
+ }
+ return __lttng_ust_plibc_dlmopen(nsid, filename, flags);
}
+#endif
static
int _lttng_ust_dl_libc_dlclose(void *handle)
}
static
-void lttng_ust_dl_dlopen(void *so_base, const char *so_name, void *ip)
+void lttng_ust_dl_dlopen(void *so_base, const char *so_name,
+ int flags, void *ip)
{
char resolved_path[PATH_MAX];
struct lttng_ust_elf *elf;
elf = lttng_ust_elf_create(resolved_path);
if (!elf) {
- ERR("could not acces file %s", resolved_path);
+ ERR("could not access file %s", resolved_path);
return;
}
}
tracepoint(lttng_ust_dl, dlopen,
- ip, so_base, resolved_path, memsz);
+ ip, so_base, resolved_path, flags, memsz,
+ has_build_id, has_debug_link);
if (has_build_id) {
tracepoint(lttng_ust_dl, build_id,
return;
}
-void *dlopen(const char *filename, int flag)
+#ifdef HAVE_DLMOPEN
+static
+void lttng_ust_dl_dlmopen(void *so_base, Lmid_t nsid, const char *so_name,
+ int flags, void *ip)
+{
+ char resolved_path[PATH_MAX];
+ struct lttng_ust_elf *elf;
+ uint64_t memsz;
+ uint8_t *build_id = NULL;
+ size_t build_id_len;
+ char *dbg_file = NULL;
+ uint32_t crc;
+ int has_build_id = 0, has_debug_link = 0;
+ int ret;
+
+ if (!realpath(so_name, resolved_path)) {
+ ERR("could not resolve path '%s'", so_name);
+ return;
+ }
+
+ elf = lttng_ust_elf_create(resolved_path);
+ if (!elf) {
+ ERR("could not access file %s", resolved_path);
+ return;
+ }
+
+ ret = lttng_ust_elf_get_memsz(elf, &memsz);
+ if (ret) {
+ goto end;
+ }
+ ret = lttng_ust_elf_get_build_id(
+ elf, &build_id, &build_id_len, &has_build_id);
+ if (ret) {
+ goto end;
+ }
+ ret = lttng_ust_elf_get_debug_link(
+ elf, &dbg_file, &crc, &has_debug_link);
+ if (ret) {
+ goto end;
+ }
+
+ tracepoint(lttng_ust_dl, dlmopen,
+ ip, so_base, nsid, resolved_path, flags, memsz,
+ has_build_id, has_debug_link);
+
+ if (has_build_id) {
+ tracepoint(lttng_ust_dl, build_id,
+ ip, so_base, build_id, build_id_len);
+ }
+
+ if (has_debug_link) {
+ tracepoint(lttng_ust_dl, debug_link,
+ ip, so_base, dbg_file, crc);
+ }
+
+end:
+ free(dbg_file);
+ free(build_id);
+ lttng_ust_elf_destroy(elf);
+ return;
+}
+#endif
+
+void *dlopen(const char *filename, int flags)
{
void *handle;
- handle = _lttng_ust_dl_libc_dlopen(filename, flag);
+ handle = _lttng_ust_dl_libc_dlopen(filename, flags);
if (__tracepoint_ptrs_registered && handle) {
struct link_map *p = NULL;
int ret;
ret = dlinfo(handle, RTLD_DI_LINKMAP, &p);
if (ret != -1 && p != NULL && p->l_addr != 0) {
- lttng_ust_dl_dlopen((void *) p->l_addr, p->l_name,
- __builtin_return_address(0));
+ lttng_ust_dl_dlopen((void *) p->l_addr,
+ p->l_name, flags, LTTNG_UST_CALLER_IP());
}
}
-
+ lttng_ust_dl_update(LTTNG_UST_CALLER_IP());
return handle;
}
-int dlclose(void *handle)
+#ifdef HAVE_DLMOPEN
+void *dlmopen(Lmid_t nsid, const char *filename, int flags)
{
+ void *handle;
+
+ handle = _lttng_ust_dl_libc_dlmopen(nsid, filename, flags);
if (__tracepoint_ptrs_registered && handle) {
struct link_map *p = NULL;
int ret;
+ ret = dlinfo(handle, RTLD_DI_LINKMAP, &p);
+ if (ret != -1 && p != NULL && p->l_addr != 0) {
+ lttng_ust_dl_dlmopen((void *) p->l_addr,
+ nsid, p->l_name, flags,
+ LTTNG_UST_CALLER_IP());
+ }
+ }
+ lttng_ust_dl_update(LTTNG_UST_CALLER_IP());
+ return handle;
+
+}
+#endif
+
+int dlclose(void *handle)
+{
+ int ret;
+
+ if (__tracepoint_ptrs_registered) {
+ struct link_map *p = NULL;
+
ret = dlinfo(handle, RTLD_DI_LINKMAP, &p);
if (ret != -1 && p != NULL && p->l_addr != 0) {
tracepoint(lttng_ust_dl, dlclose,
- __builtin_return_address(0),
+ LTTNG_UST_CALLER_IP(),
(void *) p->l_addr);
}
}
-
- return _lttng_ust_dl_libc_dlclose(handle);
+ ret = _lttng_ust_dl_libc_dlclose(handle);
+ lttng_ust_dl_update(LTTNG_UST_CALLER_IP());
+ return ret;
}
projects / lttng-ust.git / blobdiff