summaryrefslogtreecommitdiff
path: root/src/coredump
diff options
context:
space:
mode:
Diffstat (limited to 'src/coredump')
l---------src/coredump/Makefile1
-rw-r--r--src/coredump/coredump-vacuum.c268
-rw-r--r--src/coredump/coredump-vacuum.h25
-rw-r--r--src/coredump/coredump.c880
-rw-r--r--src/coredump/coredump.conf21
-rw-r--r--src/coredump/coredumpctl.c880
-rw-r--r--src/coredump/stacktrace.c200
-rw-r--r--src/coredump/stacktrace.h22
-rw-r--r--src/coredump/test-coredump-vacuum.c30
9 files changed, 2327 insertions, 0 deletions
diff --git a/src/coredump/Makefile b/src/coredump/Makefile
new file mode 120000
index 0000000000..d0b0e8e008
--- /dev/null
+++ b/src/coredump/Makefile
@@ -0,0 +1 @@
+../Makefile \ No newline at end of file
diff --git a/src/coredump/coredump-vacuum.c b/src/coredump/coredump-vacuum.c
new file mode 100644
index 0000000000..f02b6dbd87
--- /dev/null
+++ b/src/coredump/coredump-vacuum.c
@@ -0,0 +1,268 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Lennart Poettering
+
+ systemd 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; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/statvfs.h>
+
+#include "alloc-util.h"
+#include "coredump-vacuum.h"
+#include "dirent-util.h"
+#include "fd-util.h"
+#include "hashmap.h"
+#include "macro.h"
+#include "string-util.h"
+#include "time-util.h"
+#include "user-util.h"
+#include "util.h"
+
+#define DEFAULT_MAX_USE_LOWER (uint64_t) (1ULL*1024ULL*1024ULL) /* 1 MiB */
+#define DEFAULT_MAX_USE_UPPER (uint64_t) (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */
+#define DEFAULT_KEEP_FREE_UPPER (uint64_t) (4ULL*1024ULL*1024ULL*1024ULL) /* 4 GiB */
+#define DEFAULT_KEEP_FREE (uint64_t) (1024ULL*1024ULL) /* 1 MB */
+
+struct vacuum_candidate {
+ unsigned n_files;
+ char *oldest_file;
+ usec_t oldest_mtime;
+};
+
+static void vacuum_candidate_free(struct vacuum_candidate *c) {
+ if (!c)
+ return;
+
+ free(c->oldest_file);
+ free(c);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(struct vacuum_candidate*, vacuum_candidate_free);
+
+static void vacuum_candidate_hasmap_free(Hashmap *h) {
+ struct vacuum_candidate *c;
+
+ while ((c = hashmap_steal_first(h)))
+ vacuum_candidate_free(c);
+
+ hashmap_free(h);
+}
+
+DEFINE_TRIVIAL_CLEANUP_FUNC(Hashmap*, vacuum_candidate_hasmap_free);
+
+static int uid_from_file_name(const char *filename, uid_t *uid) {
+ const char *p, *e, *u;
+
+ p = startswith(filename, "core.");
+ if (!p)
+ return -EINVAL;
+
+ /* Skip the comm field */
+ p = strchr(p, '.');
+ if (!p)
+ return -EINVAL;
+ p++;
+
+ /* Find end up UID */
+ e = strchr(p, '.');
+ if (!e)
+ return -EINVAL;
+
+ u = strndupa(p, e-p);
+ return parse_uid(u, uid);
+}
+
+static bool vacuum_necessary(int fd, uint64_t sum, uint64_t keep_free, uint64_t max_use) {
+ uint64_t fs_size = 0, fs_free = (uint64_t) -1;
+ struct statvfs sv;
+
+ assert(fd >= 0);
+
+ if (fstatvfs(fd, &sv) >= 0) {
+ fs_size = sv.f_frsize * sv.f_blocks;
+ fs_free = sv.f_frsize * sv.f_bfree;
+ }
+
+ if (max_use == (uint64_t) -1) {
+
+ if (fs_size > 0) {
+ max_use = PAGE_ALIGN(fs_size / 10); /* 10% */
+
+ if (max_use > DEFAULT_MAX_USE_UPPER)
+ max_use = DEFAULT_MAX_USE_UPPER;
+
+ if (max_use < DEFAULT_MAX_USE_LOWER)
+ max_use = DEFAULT_MAX_USE_LOWER;
+ } else
+ max_use = DEFAULT_MAX_USE_LOWER;
+ } else
+ max_use = PAGE_ALIGN(max_use);
+
+ if (max_use > 0 && sum > max_use)
+ return true;
+
+ if (keep_free == (uint64_t) -1) {
+
+ if (fs_size > 0) {
+ keep_free = PAGE_ALIGN((fs_size * 3) / 20); /* 15% */
+
+ if (keep_free > DEFAULT_KEEP_FREE_UPPER)
+ keep_free = DEFAULT_KEEP_FREE_UPPER;
+ } else
+ keep_free = DEFAULT_KEEP_FREE;
+ } else
+ keep_free = PAGE_ALIGN(keep_free);
+
+ if (keep_free > 0 && fs_free < keep_free)
+ return true;
+
+ return false;
+}
+
+int coredump_vacuum(int exclude_fd, uint64_t keep_free, uint64_t max_use) {
+ _cleanup_closedir_ DIR *d = NULL;
+ struct stat exclude_st;
+ int r;
+
+ if (keep_free == 0 && max_use == 0)
+ return 0;
+
+ if (exclude_fd >= 0) {
+ if (fstat(exclude_fd, &exclude_st) < 0)
+ return log_error_errno(errno, "Failed to fstat(): %m");
+ }
+
+ /* This algorithm will keep deleting the oldest file of the
+ * user with the most coredumps until we are back in the size
+ * limits. Note that vacuuming for journal files is different,
+ * because we rely on rate-limiting of the messages there,
+ * to avoid being flooded. */
+
+ d = opendir("/var/lib/systemd/coredump");
+ if (!d) {
+ if (errno == ENOENT)
+ return 0;
+
+ return log_error_errno(errno, "Can't open coredump directory: %m");
+ }
+
+ for (;;) {
+ _cleanup_(vacuum_candidate_hasmap_freep) Hashmap *h = NULL;
+ struct vacuum_candidate *worst = NULL;
+ struct dirent *de;
+ uint64_t sum = 0;
+
+ rewinddir(d);
+
+ FOREACH_DIRENT(de, d, goto fail) {
+ struct vacuum_candidate *c;
+ struct stat st;
+ uid_t uid;
+ usec_t t;
+
+ r = uid_from_file_name(de->d_name, &uid);
+ if (r < 0)
+ continue;
+
+ if (fstatat(dirfd(d), de->d_name, &st, AT_NO_AUTOMOUNT|AT_SYMLINK_NOFOLLOW) < 0) {
+ if (errno == ENOENT)
+ continue;
+
+ log_warning_errno(errno, "Failed to stat /var/lib/systemd/coredump/%s: %m", de->d_name);
+ continue;
+ }
+
+ if (!S_ISREG(st.st_mode))
+ continue;
+
+ if (exclude_fd >= 0 &&
+ exclude_st.st_dev == st.st_dev &&
+ exclude_st.st_ino == st.st_ino)
+ continue;
+
+ r = hashmap_ensure_allocated(&h, NULL);
+ if (r < 0)
+ return log_oom();
+
+ t = timespec_load(&st.st_mtim);
+
+ c = hashmap_get(h, UID_TO_PTR(uid));
+ if (c) {
+
+ if (t < c->oldest_mtime) {
+ char *n;
+
+ n = strdup(de->d_name);
+ if (!n)
+ return log_oom();
+
+ free(c->oldest_file);
+ c->oldest_file = n;
+ c->oldest_mtime = t;
+ }
+
+ } else {
+ _cleanup_(vacuum_candidate_freep) struct vacuum_candidate *n = NULL;
+
+ n = new0(struct vacuum_candidate, 1);
+ if (!n)
+ return log_oom();
+
+ n->oldest_file = strdup(de->d_name);
+ if (!n->oldest_file)
+ return log_oom();
+
+ n->oldest_mtime = t;
+
+ r = hashmap_put(h, UID_TO_PTR(uid), n);
+ if (r < 0)
+ return log_oom();
+
+ c = n;
+ n = NULL;
+ }
+
+ c->n_files++;
+
+ if (!worst ||
+ worst->n_files < c->n_files ||
+ (worst->n_files == c->n_files && c->oldest_mtime < worst->oldest_mtime))
+ worst = c;
+
+ sum += st.st_blocks * 512;
+ }
+
+ if (!worst)
+ break;
+
+ r = vacuum_necessary(dirfd(d), sum, keep_free, max_use);
+ if (r <= 0)
+ return r;
+
+ if (unlinkat(dirfd(d), worst->oldest_file, 0) < 0) {
+
+ if (errno == ENOENT)
+ continue;
+
+ return log_error_errno(errno, "Failed to remove file %s: %m", worst->oldest_file);
+ } else
+ log_info("Removed old coredump %s.", worst->oldest_file);
+ }
+
+ return 0;
+
+fail:
+ return log_error_errno(errno, "Failed to read directory: %m");
+}
diff --git a/src/coredump/coredump-vacuum.h b/src/coredump/coredump-vacuum.h
new file mode 100644
index 0000000000..4b7b9f2d98
--- /dev/null
+++ b/src/coredump/coredump-vacuum.h
@@ -0,0 +1,25 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Lennart Poettering
+
+ systemd 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; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <inttypes.h>
+#include <sys/types.h>
+
+int coredump_vacuum(int exclude_fd, uint64_t keep_free, uint64_t max_use);
diff --git a/src/coredump/coredump.c b/src/coredump/coredump.c
new file mode 100644
index 0000000000..8b1c670cc6
--- /dev/null
+++ b/src/coredump/coredump.c
@@ -0,0 +1,880 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Lennart Poettering
+
+ systemd 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; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <errno.h>
+#include <stdio.h>
+#include <sys/prctl.h>
+#include <sys/xattr.h>
+#include <unistd.h>
+
+#ifdef HAVE_ELFUTILS
+# include <dwarf.h>
+# include <elfutils/libdwfl.h>
+#endif
+
+#include "sd-journal.h"
+#include "sd-login.h"
+
+#include "acl-util.h"
+#include "alloc-util.h"
+#include "capability-util.h"
+#include "cgroup-util.h"
+#include "compress.h"
+#include "conf-parser.h"
+#include "copy.h"
+#include "coredump-vacuum.h"
+#include "dirent-util.h"
+#include "escape.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "fs-util.h"
+#include "io-util.h"
+#include "journald-native.h"
+#include "log.h"
+#include "macro.h"
+#include "mkdir.h"
+#include "parse-util.h"
+#include "process-util.h"
+#include "special.h"
+#include "stacktrace.h"
+#include "string-table.h"
+#include "string-util.h"
+#include "strv.h"
+#include "user-util.h"
+#include "util.h"
+
+/* The maximum size up to which we process coredumps */
+#define PROCESS_SIZE_MAX ((uint64_t) (2LLU*1024LLU*1024LLU*1024LLU))
+
+/* The maximum size up to which we leave the coredump around on
+ * disk */
+#define EXTERNAL_SIZE_MAX PROCESS_SIZE_MAX
+
+/* The maximum size up to which we store the coredump in the
+ * journal */
+#define JOURNAL_SIZE_MAX ((size_t) (767LU*1024LU*1024LU))
+
+/* Make sure to not make this larger than the maximum journal entry
+ * size. See DATA_SIZE_MAX in journald-native.c. */
+assert_cc(JOURNAL_SIZE_MAX <= DATA_SIZE_MAX);
+
+enum {
+ INFO_PID,
+ INFO_UID,
+ INFO_GID,
+ INFO_SIGNAL,
+ INFO_TIMESTAMP,
+ INFO_COMM,
+ INFO_EXE,
+ _INFO_LEN
+};
+
+typedef enum CoredumpStorage {
+ COREDUMP_STORAGE_NONE,
+ COREDUMP_STORAGE_EXTERNAL,
+ COREDUMP_STORAGE_JOURNAL,
+ COREDUMP_STORAGE_BOTH,
+ _COREDUMP_STORAGE_MAX,
+ _COREDUMP_STORAGE_INVALID = -1
+} CoredumpStorage;
+
+static const char* const coredump_storage_table[_COREDUMP_STORAGE_MAX] = {
+ [COREDUMP_STORAGE_NONE] = "none",
+ [COREDUMP_STORAGE_EXTERNAL] = "external",
+ [COREDUMP_STORAGE_JOURNAL] = "journal",
+ [COREDUMP_STORAGE_BOTH] = "both",
+};
+
+DEFINE_PRIVATE_STRING_TABLE_LOOKUP(coredump_storage, CoredumpStorage);
+static DEFINE_CONFIG_PARSE_ENUM(config_parse_coredump_storage, coredump_storage, CoredumpStorage, "Failed to parse storage setting");
+
+static CoredumpStorage arg_storage = COREDUMP_STORAGE_EXTERNAL;
+static bool arg_compress = true;
+static uint64_t arg_process_size_max = PROCESS_SIZE_MAX;
+static uint64_t arg_external_size_max = EXTERNAL_SIZE_MAX;
+static size_t arg_journal_size_max = JOURNAL_SIZE_MAX;
+static uint64_t arg_keep_free = (uint64_t) -1;
+static uint64_t arg_max_use = (uint64_t) -1;
+
+static int parse_config(void) {
+ static const ConfigTableItem items[] = {
+ { "Coredump", "Storage", config_parse_coredump_storage, 0, &arg_storage },
+ { "Coredump", "Compress", config_parse_bool, 0, &arg_compress },
+ { "Coredump", "ProcessSizeMax", config_parse_iec_uint64, 0, &arg_process_size_max },
+ { "Coredump", "ExternalSizeMax", config_parse_iec_uint64, 0, &arg_external_size_max },
+ { "Coredump", "JournalSizeMax", config_parse_iec_size, 0, &arg_journal_size_max },
+ { "Coredump", "KeepFree", config_parse_iec_uint64, 0, &arg_keep_free },
+ { "Coredump", "MaxUse", config_parse_iec_uint64, 0, &arg_max_use },
+ {}
+ };
+
+ return config_parse_many(PKGSYSCONFDIR "/coredump.conf",
+ CONF_PATHS_NULSTR("systemd/coredump.conf.d"),
+ "Coredump\0",
+ config_item_table_lookup, items,
+ false, NULL);
+}
+
+static int fix_acl(int fd, uid_t uid) {
+
+#ifdef HAVE_ACL
+ _cleanup_(acl_freep) acl_t acl = NULL;
+ acl_entry_t entry;
+ acl_permset_t permset;
+ int r;
+
+ assert(fd >= 0);
+
+ if (uid <= SYSTEM_UID_MAX)
+ return 0;
+
+ /* Make sure normal users can read (but not write or delete)
+ * their own coredumps */
+
+ acl = acl_get_fd(fd);
+ if (!acl)
+ return log_error_errno(errno, "Failed to get ACL: %m");
+
+ if (acl_create_entry(&acl, &entry) < 0 ||
+ acl_set_tag_type(entry, ACL_USER) < 0 ||
+ acl_set_qualifier(entry, &uid) < 0) {
+ log_error_errno(errno, "Failed to patch ACL: %m");
+ return -errno;
+ }
+
+ if (acl_get_permset(entry, &permset) < 0 ||
+ acl_add_perm(permset, ACL_READ) < 0)
+ return log_warning_errno(errno, "Failed to patch ACL: %m");
+
+ r = calc_acl_mask_if_needed(&acl);
+ if (r < 0)
+ return log_warning_errno(r, "Failed to patch ACL: %m");
+
+ if (acl_set_fd(fd, acl) < 0)
+ return log_error_errno(errno, "Failed to apply ACL: %m");
+#endif
+
+ return 0;
+}
+
+static int fix_xattr(int fd, const char *info[_INFO_LEN]) {
+
+ static const char * const xattrs[_INFO_LEN] = {
+ [INFO_PID] = "user.coredump.pid",
+ [INFO_UID] = "user.coredump.uid",
+ [INFO_GID] = "user.coredump.gid",
+ [INFO_SIGNAL] = "user.coredump.signal",
+ [INFO_TIMESTAMP] = "user.coredump.timestamp",
+ [INFO_COMM] = "user.coredump.comm",
+ [INFO_EXE] = "user.coredump.exe",
+ };
+
+ int r = 0;
+ unsigned i;
+
+ assert(fd >= 0);
+
+ /* Attach some metadata to coredumps via extended
+ * attributes. Just because we can. */
+
+ for (i = 0; i < _INFO_LEN; i++) {
+ int k;
+
+ if (isempty(info[i]) || !xattrs[i])
+ continue;
+
+ k = fsetxattr(fd, xattrs[i], info[i], strlen(info[i]), XATTR_CREATE);
+ if (k < 0 && r == 0)
+ r = -errno;
+ }
+
+ return r;
+}
+
+#define filename_escape(s) xescape((s), "./ ")
+
+static int fix_permissions(
+ int fd,
+ const char *filename,
+ const char *target,
+ const char *info[_INFO_LEN],
+ uid_t uid) {
+
+ assert(fd >= 0);
+ assert(filename);
+ assert(target);
+ assert(info);
+
+ /* Ignore errors on these */
+ fchmod(fd, 0640);
+ fix_acl(fd, uid);
+ fix_xattr(fd, info);
+
+ if (fsync(fd) < 0)
+ return log_error_errno(errno, "Failed to sync coredump %s: %m", filename);
+
+ if (rename(filename, target) < 0)
+ return log_error_errno(errno, "Failed to rename coredump %s -> %s: %m", filename, target);
+
+ return 0;
+}
+
+static int maybe_remove_external_coredump(const char *filename, uint64_t size) {
+
+ /* Returns 1 if might remove, 0 if will not remove, < 0 on error. */
+
+ if (IN_SET(arg_storage, COREDUMP_STORAGE_EXTERNAL, COREDUMP_STORAGE_BOTH) &&
+ size <= arg_external_size_max)
+ return 0;
+
+ if (!filename)
+ return 1;
+
+ if (unlink(filename) < 0 && errno != ENOENT)
+ return log_error_errno(errno, "Failed to unlink %s: %m", filename);
+
+ return 1;
+}
+
+static int make_filename(const char *info[_INFO_LEN], char **ret) {
+ _cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL;
+ sd_id128_t boot = {};
+ int r;
+
+ assert(info);
+
+ c = filename_escape(info[INFO_COMM]);
+ if (!c)
+ return -ENOMEM;
+
+ u = filename_escape(info[INFO_UID]);
+ if (!u)
+ return -ENOMEM;
+
+ r = sd_id128_get_boot(&boot);
+ if (r < 0)
+ return r;
+
+ p = filename_escape(info[INFO_PID]);
+ if (!p)
+ return -ENOMEM;
+
+ t = filename_escape(info[INFO_TIMESTAMP]);
+ if (!t)
+ return -ENOMEM;
+
+ if (asprintf(ret,
+ "/var/lib/systemd/coredump/core.%s.%s." SD_ID128_FORMAT_STR ".%s.%s000000",
+ c,
+ u,
+ SD_ID128_FORMAT_VAL(boot),
+ p,
+ t) < 0)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int save_external_coredump(
+ const char *info[_INFO_LEN],
+ uid_t uid,
+ char **ret_filename,
+ int *ret_node_fd,
+ int *ret_data_fd,
+ uint64_t *ret_size) {
+
+ _cleanup_free_ char *fn = NULL, *tmp = NULL;
+ _cleanup_close_ int fd = -1;
+ struct stat st;
+ int r;
+
+ assert(info);
+ assert(ret_filename);
+ assert(ret_node_fd);
+ assert(ret_data_fd);
+ assert(ret_size);
+
+ r = make_filename(info, &fn);
+ if (r < 0)
+ return log_error_errno(r, "Failed to determine coredump file name: %m");
+
+ r = tempfn_random(fn, NULL, &tmp);
+ if (r < 0)
+ return log_error_errno(r, "Failed to determine temporary file name: %m");
+
+ mkdir_p_label("/var/lib/systemd/coredump", 0755);
+
+ fd = open(tmp, O_CREAT|O_EXCL|O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0640);
+ if (fd < 0)
+ return log_error_errno(errno, "Failed to create coredump file %s: %m", tmp);
+
+ r = copy_bytes(STDIN_FILENO, fd, arg_process_size_max, false);
+ if (r == -EFBIG) {
+ log_error("Coredump of %s (%s) is larger than configured processing limit, refusing.", info[INFO_PID], info[INFO_COMM]);
+ goto fail;
+ } else if (IN_SET(r, -EDQUOT, -ENOSPC)) {
+ log_error("Not enough disk space for coredump of %s (%s), refusing.", info[INFO_PID], info[INFO_COMM]);
+ goto fail;
+ } else if (r < 0) {
+ log_error_errno(r, "Failed to dump coredump to file: %m");
+ goto fail;
+ }
+
+ if (fstat(fd, &st) < 0) {
+ log_error_errno(errno, "Failed to fstat coredump %s: %m", tmp);
+ goto fail;
+ }
+
+ if (lseek(fd, 0, SEEK_SET) == (off_t) -1) {
+ log_error_errno(errno, "Failed to seek on %s: %m", tmp);
+ goto fail;
+ }
+
+#if defined(HAVE_XZ) || defined(HAVE_LZ4)
+ /* If we will remove the coredump anyway, do not compress. */
+ if (maybe_remove_external_coredump(NULL, st.st_size) == 0
+ && arg_compress) {
+
+ _cleanup_free_ char *fn_compressed = NULL, *tmp_compressed = NULL;
+ _cleanup_close_ int fd_compressed = -1;
+
+ fn_compressed = strappend(fn, COMPRESSED_EXT);
+ if (!fn_compressed) {
+ log_oom();
+ goto uncompressed;
+ }
+
+ r = tempfn_random(fn_compressed, NULL, &tmp_compressed);
+ if (r < 0) {
+ log_error_errno(r, "Failed to determine temporary file name for %s: %m", fn_compressed);
+ goto uncompressed;
+ }
+
+ fd_compressed = open(tmp_compressed, O_CREAT|O_EXCL|O_RDWR|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW, 0640);
+ if (fd_compressed < 0) {
+ log_error_errno(errno, "Failed to create file %s: %m", tmp_compressed);
+ goto uncompressed;
+ }
+
+ r = compress_stream(fd, fd_compressed, -1);
+ if (r < 0) {
+ log_error_errno(r, "Failed to compress %s: %m", tmp_compressed);
+ goto fail_compressed;
+ }
+
+ r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, info, uid);
+ if (r < 0)
+ goto fail_compressed;
+
+ /* OK, this worked, we can get rid of the uncompressed version now */
+ unlink_noerrno(tmp);
+
+ *ret_filename = fn_compressed; /* compressed */
+ *ret_node_fd = fd_compressed; /* compressed */
+ *ret_data_fd = fd; /* uncompressed */
+ *ret_size = (uint64_t) st.st_size; /* uncompressed */
+
+ fn_compressed = NULL;
+ fd = fd_compressed = -1;
+
+ return 0;
+
+ fail_compressed:
+ unlink_noerrno(tmp_compressed);
+ }
+
+uncompressed:
+#endif
+
+ r = fix_permissions(fd, tmp, fn, info, uid);
+ if (r < 0)
+ goto fail;
+
+ *ret_filename = fn;
+ *ret_data_fd = fd;
+ *ret_node_fd = -1;
+ *ret_size = (uint64_t) st.st_size;
+
+ fn = NULL;
+ fd = -1;
+
+ return 0;
+
+fail:
+ unlink_noerrno(tmp);
+ return r;
+}
+
+static int allocate_journal_field(int fd, size_t size, char **ret, size_t *ret_size) {
+ _cleanup_free_ char *field = NULL;
+ ssize_t n;
+
+ assert(fd >= 0);
+ assert(ret);
+ assert(ret_size);
+
+ if (lseek(fd, 0, SEEK_SET) == (off_t) -1)
+ return log_warning_errno(errno, "Failed to seek: %m");
+
+ field = malloc(9 + size);
+ if (!field) {
+ log_warning("Failed to allocate memory for coredump, coredump will not be stored.");
+ return -ENOMEM;
+ }
+
+ memcpy(field, "COREDUMP=", 9);
+
+ n = read(fd, field + 9, size);
+ if (n < 0)
+ return log_error_errno((int) n, "Failed to read core data: %m");
+ if ((size_t) n < size) {
+ log_error("Core data too short.");
+ return -EIO;
+ }
+
+ *ret = field;
+ *ret_size = size + 9;
+
+ field = NULL;
+
+ return 0;
+}
+
+/* Joins /proc/[pid]/fd/ and /proc/[pid]/fdinfo/ into the following lines:
+ * 0:/dev/pts/23
+ * pos: 0
+ * flags: 0100002
+ *
+ * 1:/dev/pts/23
+ * pos: 0
+ * flags: 0100002
+ *
+ * 2:/dev/pts/23
+ * pos: 0
+ * flags: 0100002
+ * EOF
+ */
+static int compose_open_fds(pid_t pid, char **open_fds) {
+ _cleanup_closedir_ DIR *proc_fd_dir = NULL;
+ _cleanup_close_ int proc_fdinfo_fd = -1;
+ _cleanup_free_ char *buffer = NULL;
+ _cleanup_fclose_ FILE *stream = NULL;
+ const char *fddelim = "", *path;
+ struct dirent *dent = NULL;
+ size_t size = 0;
+ int r = 0;
+
+ assert(pid >= 0);
+ assert(open_fds != NULL);
+
+ path = procfs_file_alloca(pid, "fd");
+ proc_fd_dir = opendir(path);
+ if (!proc_fd_dir)
+ return -errno;
+
+ proc_fdinfo_fd = openat(dirfd(proc_fd_dir), "../fdinfo", O_DIRECTORY|O_NOFOLLOW|O_CLOEXEC|O_PATH);
+ if (proc_fdinfo_fd < 0)
+ return -errno;
+
+ stream = open_memstream(&buffer, &size);
+ if (!stream)
+ return -ENOMEM;
+
+ FOREACH_DIRENT(dent, proc_fd_dir, return -errno) {
+ _cleanup_fclose_ FILE *fdinfo = NULL;
+ _cleanup_free_ char *fdname = NULL;
+ char line[LINE_MAX];
+ int fd;
+
+ r = readlinkat_malloc(dirfd(proc_fd_dir), dent->d_name, &fdname);
+ if (r < 0)
+ return r;
+
+ fprintf(stream, "%s%s:%s\n", fddelim, dent->d_name, fdname);
+ fddelim = "\n";
+
+ /* Use the directory entry from /proc/[pid]/fd with /proc/[pid]/fdinfo */
+ fd = openat(proc_fdinfo_fd, dent->d_name, O_NOFOLLOW|O_CLOEXEC|O_RDONLY);
+ if (fd < 0)
+ continue;
+
+ fdinfo = fdopen(fd, "re");
+ if (fdinfo == NULL) {
+ close(fd);
+ continue;
+ }
+
+ FOREACH_LINE(line, fdinfo, break) {
+ fputs(line, stream);
+ if (!endswith(line, "\n"))
+ fputc('\n', stream);
+ }
+ }
+
+ errno = 0;
+ stream = safe_fclose(stream);
+
+ if (errno > 0)
+ return -errno;
+
+ *open_fds = buffer;
+ buffer = NULL;
+
+ return 0;
+}
+
+int main(int argc, char* argv[]) {
+
+ /* The small core field we allocate on the stack, to keep things simple */
+ char
+ *core_pid = NULL, *core_uid = NULL, *core_gid = NULL, *core_signal = NULL,
+ *core_session = NULL, *core_exe = NULL, *core_comm = NULL, *core_cmdline = NULL,
+ *core_cgroup = NULL, *core_cwd = NULL, *core_root = NULL, *core_unit = NULL,
+ *core_slice = NULL;
+
+ /* The larger ones we allocate on the heap */
+ _cleanup_free_ char
+ *core_timestamp = NULL, *core_message = NULL, *coredump_data = NULL, *core_owner_uid = NULL,
+ *core_open_fds = NULL, *core_proc_status = NULL, *core_proc_maps = NULL, *core_proc_limits = NULL,
+ *core_proc_cgroup = NULL, *core_environ = NULL;
+
+ _cleanup_free_ char *exe = NULL, *comm = NULL, *filename = NULL;
+ const char *info[_INFO_LEN];
+
+ _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1;
+
+ struct iovec iovec[26];
+ uint64_t coredump_size;
+ int r, j = 0;
+ uid_t uid, owner_uid;
+ gid_t gid;
+ pid_t pid;
+ char *t;
+ const char *p;
+
+ /* Make sure we never enter a loop */
+ prctl(PR_SET_DUMPABLE, 0);
+
+ /* First, log to a safe place, since we don't know what
+ * crashed and it might be journald which we'd rather not log
+ * to then. */
+ log_set_target(LOG_TARGET_KMSG);
+ log_open();
+
+ if (argc < INFO_COMM + 1) {
+ log_error("Not enough arguments passed from kernel (%d, expected %d).",
+ argc - 1, INFO_COMM + 1 - 1);
+ r = -EINVAL;
+ goto finish;
+ }
+
+ /* Ignore all parse errors */
+ parse_config();
+
+ log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage));
+ log_debug("Selected compression %s.", yes_no(arg_compress));
+
+ r = parse_uid(argv[INFO_UID + 1], &uid);
+ if (r < 0) {
+ log_error("Failed to parse UID.");
+ goto finish;
+ }
+
+ r = parse_pid(argv[INFO_PID + 1], &pid);
+ if (r < 0) {
+ log_error("Failed to parse PID.");
+ goto finish;
+ }
+
+ r = parse_gid(argv[INFO_GID + 1], &gid);
+ if (r < 0) {
+ log_error("Failed to parse GID.");
+ goto finish;
+ }
+
+ if (get_process_comm(pid, &comm) < 0) {
+ log_warning("Failed to get COMM, falling back to the command line.");
+ comm = strv_join(argv + INFO_COMM + 1, " ");
+ }
+
+ if (get_process_exe(pid, &exe) < 0)
+ log_warning("Failed to get EXE.");
+
+ info[INFO_PID] = argv[INFO_PID + 1];
+ info[INFO_UID] = argv[INFO_UID + 1];
+ info[INFO_GID] = argv[INFO_GID + 1];
+ info[INFO_SIGNAL] = argv[INFO_SIGNAL + 1];
+ info[INFO_TIMESTAMP] = argv[INFO_TIMESTAMP + 1];
+ info[INFO_COMM] = comm;
+ info[INFO_EXE] = exe;
+
+ if (cg_pid_get_unit(pid, &t) >= 0) {
+
+ if (streq(t, SPECIAL_JOURNALD_SERVICE)) {
+ free(t);
+
+ /* If we are journald, we cut things short,
+ * don't write to the journal, but still
+ * create a coredump. */
+
+ if (arg_storage != COREDUMP_STORAGE_NONE)
+ arg_storage = COREDUMP_STORAGE_EXTERNAL;
+
+ r = save_external_coredump(info, uid, &filename, &coredump_node_fd, &coredump_fd, &coredump_size);
+ if (r < 0)
+ goto finish;
+
+ r = maybe_remove_external_coredump(filename, coredump_size);
+ if (r < 0)
+ goto finish;
+
+ log_info("Detected coredump of the journal daemon itself, diverted to %s.", filename);
+ goto finish;
+ }
+
+ core_unit = strjoina("COREDUMP_UNIT=", t);
+ free(t);
+
+ } else if (cg_pid_get_user_unit(pid, &t) >= 0) {
+ core_unit = strjoina("COREDUMP_USER_UNIT=", t);
+ free(t);
+ }
+
+ if (core_unit)
+ IOVEC_SET_STRING(iovec[j++], core_unit);
+
+ /* OK, now we know it's not the journal, hence we can make use
+ * of it now. */
+ log_set_target(LOG_TARGET_JOURNAL_OR_KMSG);
+ log_open();
+
+ core_pid = strjoina("COREDUMP_PID=", info[INFO_PID]);
+ IOVEC_SET_STRING(iovec[j++], core_pid);
+
+ core_uid = strjoina("COREDUMP_UID=", info[INFO_UID]);
+ IOVEC_SET_STRING(iovec[j++], core_uid);
+
+ core_gid = strjoina("COREDUMP_GID=", info[INFO_GID]);
+ IOVEC_SET_STRING(iovec[j++], core_gid);
+
+ core_signal = strjoina("COREDUMP_SIGNAL=", info[INFO_SIGNAL]);
+ IOVEC_SET_STRING(iovec[j++], core_signal);
+
+ if (sd_pid_get_session(pid, &t) >= 0) {
+ core_session = strjoina("COREDUMP_SESSION=", t);
+ free(t);
+
+ IOVEC_SET_STRING(iovec[j++], core_session);
+ }
+
+ if (sd_pid_get_owner_uid(pid, &owner_uid) >= 0) {
+ r = asprintf(&core_owner_uid,
+ "COREDUMP_OWNER_UID=" UID_FMT, owner_uid);
+ if (r > 0)
+ IOVEC_SET_STRING(iovec[j++], core_owner_uid);
+ }
+
+ if (sd_pid_get_slice(pid, &t) >= 0) {
+ core_slice = strjoina("COREDUMP_SLICE=", t);
+ free(t);
+
+ IOVEC_SET_STRING(iovec[j++], core_slice);
+ }
+
+ if (comm) {
+ core_comm = strjoina("COREDUMP_COMM=", comm);
+ IOVEC_SET_STRING(iovec[j++], core_comm);
+ }
+
+ if (exe) {
+ core_exe = strjoina("COREDUMP_EXE=", exe);
+ IOVEC_SET_STRING(iovec[j++], core_exe);
+ }
+
+ if (get_process_cmdline(pid, 0, false, &t) >= 0) {
+ core_cmdline = strjoina("COREDUMP_CMDLINE=", t);
+ free(t);
+
+ IOVEC_SET_STRING(iovec[j++], core_cmdline);
+ }
+
+ if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) {
+ core_cgroup = strjoina("COREDUMP_CGROUP=", t);
+ free(t);
+
+ IOVEC_SET_STRING(iovec[j++], core_cgroup);
+ }
+
+ if (compose_open_fds(pid, &t) >= 0) {
+ core_open_fds = strappend("COREDUMP_OPEN_FDS=", t);
+ free(t);
+
+ if (core_open_fds)
+ IOVEC_SET_STRING(iovec[j++], core_open_fds);
+ }
+
+ p = procfs_file_alloca(pid, "status");
+ if (read_full_file(p, &t, NULL) >= 0) {
+ core_proc_status = strappend("COREDUMP_PROC_STATUS=", t);
+ free(t);
+
+ if (core_proc_status)
+ IOVEC_SET_STRING(iovec[j++], core_proc_status);
+ }
+
+ p = procfs_file_alloca(pid, "maps");
+ if (read_full_file(p, &t, NULL) >= 0) {
+ core_proc_maps = strappend("COREDUMP_PROC_MAPS=", t);
+ free(t);
+
+ if (core_proc_maps)
+ IOVEC_SET_STRING(iovec[j++], core_proc_maps);
+ }
+
+ p = procfs_file_alloca(pid, "limits");
+ if (read_full_file(p, &t, NULL) >= 0) {
+ core_proc_limits = strappend("COREDUMP_PROC_LIMITS=", t);
+ free(t);
+
+ if (core_proc_limits)
+ IOVEC_SET_STRING(iovec[j++], core_proc_limits);
+ }
+
+ p = procfs_file_alloca(pid, "cgroup");
+ if (read_full_file(p, &t, NULL) >=0) {
+ core_proc_cgroup = strappend("COREDUMP_PROC_CGROUP=", t);
+ free(t);
+
+ if (core_proc_cgroup)
+ IOVEC_SET_STRING(iovec[j++], core_proc_cgroup);
+ }
+
+ if (get_process_cwd(pid, &t) >= 0) {
+ core_cwd = strjoina("COREDUMP_CWD=", t);
+ free(t);
+
+ IOVEC_SET_STRING(iovec[j++], core_cwd);
+ }
+
+ if (get_process_root(pid, &t) >= 0) {
+ core_root = strjoina("COREDUMP_ROOT=", t);
+ free(t);
+
+ IOVEC_SET_STRING(iovec[j++], core_root);
+ }
+
+ if (get_process_environ(pid, &t) >= 0) {
+ core_environ = strappend("COREDUMP_ENVIRON=", t);
+ free(t);
+
+ if (core_environ)
+ IOVEC_SET_STRING(iovec[j++], core_environ);
+ }
+
+ core_timestamp = strjoin("COREDUMP_TIMESTAMP=", info[INFO_TIMESTAMP], "000000", NULL);
+ if (core_timestamp)
+ IOVEC_SET_STRING(iovec[j++], core_timestamp);
+
+ IOVEC_SET_STRING(iovec[j++], "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1");
+
+ assert_cc(2 == LOG_CRIT);
+ IOVEC_SET_STRING(iovec[j++], "PRIORITY=2");
+
+ /* Vacuum before we write anything again */
+ coredump_vacuum(-1, arg_keep_free, arg_max_use);
+
+ /* Always stream the coredump to disk, if that's possible */
+ r = save_external_coredump(info, uid, &filename, &coredump_node_fd, &coredump_fd, &coredump_size);
+ if (r < 0)
+ /* skip whole core dumping part */
+ goto log;
+
+ /* If we don't want to keep the coredump on disk, remove it
+ * now, as later on we will lack the privileges for
+ * it. However, we keep the fd to it, so that we can still
+ * process it and log it. */
+ r = maybe_remove_external_coredump(filename, coredump_size);
+ if (r < 0)
+ goto finish;
+ if (r == 0) {
+ const char *coredump_filename;
+
+ coredump_filename = strjoina("COREDUMP_FILENAME=", filename);
+ IOVEC_SET_STRING(iovec[j++], coredump_filename);
+ }
+
+ /* Vacuum again, but exclude the coredump we just created */
+ coredump_vacuum(coredump_node_fd >= 0 ? coredump_node_fd : coredump_fd, arg_keep_free, arg_max_use);
+
+ /* Now, let's drop privileges to become the user who owns the
+ * segfaulted process and allocate the coredump memory under
+ * the user's uid. This also ensures that the credentials
+ * journald will see are the ones of the coredumping user,
+ * thus making sure the user gets access to the core
+ * dump. Let's also get rid of all capabilities, if we run as
+ * root, we won't need them anymore. */
+ r = drop_privileges(uid, gid, 0);
+ if (r < 0) {
+ log_error_errno(r, "Failed to drop privileges: %m");
+ goto finish;
+ }
+
+#ifdef HAVE_ELFUTILS
+ /* Try to get a strack trace if we can */
+ if (coredump_size <= arg_process_size_max) {
+ _cleanup_free_ char *stacktrace = NULL;
+
+ r = coredump_make_stack_trace(coredump_fd, exe, &stacktrace);
+ if (r >= 0)
+ core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.\n\n", stacktrace, NULL);
+ else if (r == -EINVAL)
+ log_warning("Failed to generate stack trace: %s", dwfl_errmsg(dwfl_errno()));
+ else
+ log_warning_errno(r, "Failed to generate stack trace: %m");
+ }
+
+ if (!core_message)
+#endif
+log:
+ core_message = strjoin("MESSAGE=Process ", info[INFO_PID], " (", comm, ") of user ", info[INFO_UID], " dumped core.", NULL);
+ if (core_message)
+ IOVEC_SET_STRING(iovec[j++], core_message);
+
+ /* Optionally store the entire coredump in the journal */
+ if (IN_SET(arg_storage, COREDUMP_STORAGE_JOURNAL, COREDUMP_STORAGE_BOTH) &&
+ coredump_size <= arg_journal_size_max) {
+ size_t sz = 0;
+
+ /* Store the coredump itself in the journal */
+
+ r = allocate_journal_field(coredump_fd, (size_t) coredump_size, &coredump_data, &sz);
+ if (r >= 0) {
+ iovec[j].iov_base = coredump_data;
+ iovec[j].iov_len = sz;
+ j++;
+ }
+ }
+
+ r = sd_journal_sendv(iovec, j);
+ if (r < 0)
+ log_error_errno(r, "Failed to log coredump: %m");
+
+finish:
+ return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
+}
diff --git a/src/coredump/coredump.conf b/src/coredump/coredump.conf
new file mode 100644
index 0000000000..c2f0643e03
--- /dev/null
+++ b/src/coredump/coredump.conf
@@ -0,0 +1,21 @@
+# This file is part of systemd.
+#
+# systemd 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; either version 2.1 of the License, or
+# (at your option) any later version.
+#
+# Entries in this file show the compile time defaults.
+# You can change settings by editing this file.
+# Defaults can be restored by simply deleting this file.
+#
+# See coredump.conf(5) for details.
+
+[Coredump]
+#Storage=external
+#Compress=yes
+#ProcessSizeMax=2G
+#ExternalSizeMax=2G
+#JournalSizeMax=767M
+#MaxUse=
+#KeepFree=
diff --git a/src/coredump/coredumpctl.c b/src/coredump/coredumpctl.c
new file mode 100644
index 0000000000..0034a1a0ac
--- /dev/null
+++ b/src/coredump/coredumpctl.c
@@ -0,0 +1,880 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Zbigniew Jędrzejewski-Szmek
+
+ systemd 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; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <fcntl.h>
+#include <getopt.h>
+#include <locale.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "sd-journal.h"
+
+#include "alloc-util.h"
+#include "compress.h"
+#include "fd-util.h"
+#include "fileio.h"
+#include "journal-internal.h"
+#include "log.h"
+#include "macro.h"
+#include "pager.h"
+#include "parse-util.h"
+#include "path-util.h"
+#include "process-util.h"
+#include "set.h"
+#include "sigbus.h"
+#include "signal-util.h"
+#include "string-util.h"
+#include "terminal-util.h"
+#include "user-util.h"
+#include "util.h"
+
+static enum {
+ ACTION_NONE,
+ ACTION_INFO,
+ ACTION_LIST,
+ ACTION_DUMP,
+ ACTION_GDB,
+} arg_action = ACTION_LIST;
+static const char* arg_field = NULL;
+static const char *arg_directory = NULL;
+static int arg_no_pager = false;
+static int arg_no_legend = false;
+static int arg_one = false;
+static FILE* arg_output = NULL;
+
+static Set *new_matches(void) {
+ Set *set;
+ char *tmp;
+ int r;
+
+ set = set_new(NULL);
+ if (!set) {
+ log_oom();
+ return NULL;
+ }
+
+ tmp = strdup("MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1");
+ if (!tmp) {
+ log_oom();
+ set_free(set);
+ return NULL;
+ }
+
+ r = set_consume(set, tmp);
+ if (r < 0) {
+ log_error_errno(r, "failed to add to set: %m");
+ set_free(set);
+ return NULL;
+ }
+
+ return set;
+}
+
+static int add_match(Set *set, const char *match) {
+ _cleanup_free_ char *p = NULL;
+ char *pattern = NULL;
+ const char* prefix;
+ pid_t pid;
+ int r;
+
+ if (strchr(match, '='))
+ prefix = "";
+ else if (strchr(match, '/')) {
+ r = path_make_absolute_cwd(match, &p);
+ if (r < 0)
+ goto fail;
+ match = p;
+ prefix = "COREDUMP_EXE=";
+ } else if (parse_pid(match, &pid) >= 0)
+ prefix = "COREDUMP_PID=";
+ else
+ prefix = "COREDUMP_COMM=";
+
+ pattern = strjoin(prefix, match, NULL);
+ if (!pattern) {
+ r = -ENOMEM;
+ goto fail;
+ }
+
+ log_debug("Adding pattern: %s", pattern);
+ r = set_consume(set, pattern);
+ if (r < 0)
+ goto fail;
+
+ return 0;
+fail:
+ return log_error_errno(r, "Failed to add match: %m");
+}
+
+static void help(void) {
+ printf("%s [OPTIONS...]\n\n"
+ "List or retrieve coredumps from the journal.\n\n"
+ "Flags:\n"
+ " -h --help Show this help\n"
+ " --version Print version string\n"
+ " --no-pager Do not pipe output into a pager\n"
+ " --no-legend Do not print the column headers.\n"
+ " -1 Show information about most recent entry only\n"
+ " -F --field=FIELD List all values a certain field takes\n"
+ " -o --output=FILE Write output to FILE\n\n"
+ " -D --directory=DIR Use journal files from directory\n\n"
+
+ "Commands:\n"
+ " list [MATCHES...] List available coredumps (default)\n"
+ " info [MATCHES...] Show detailed information about one or more coredumps\n"
+ " dump [MATCHES...] Print first matching coredump to stdout\n"
+ " gdb [MATCHES...] Start gdb for the first matching coredump\n"
+ , program_invocation_short_name);
+}
+
+static int parse_argv(int argc, char *argv[], Set *matches) {
+ enum {
+ ARG_VERSION = 0x100,
+ ARG_NO_PAGER,
+ ARG_NO_LEGEND,
+ };
+
+ int r, c;
+
+ static const struct option options[] = {
+ { "help", no_argument, NULL, 'h' },
+ { "version" , no_argument, NULL, ARG_VERSION },
+ { "no-pager", no_argument, NULL, ARG_NO_PAGER },
+ { "no-legend", no_argument, NULL, ARG_NO_LEGEND },
+ { "output", required_argument, NULL, 'o' },
+ { "field", required_argument, NULL, 'F' },
+ { "directory", required_argument, NULL, 'D' },
+ {}
+ };
+
+ assert(argc >= 0);
+ assert(argv);
+
+ while ((c = getopt_long(argc, argv, "ho:F:1D:", options, NULL)) >= 0)
+ switch(c) {
+
+ case 'h':
+ arg_action = ACTION_NONE;
+ help();
+ return 0;
+
+ case ARG_VERSION:
+ arg_action = ACTION_NONE;
+ return version();
+
+ case ARG_NO_PAGER:
+ arg_no_pager = true;
+ break;
+
+ case ARG_NO_LEGEND:
+ arg_no_legend = true;
+ break;
+
+ case 'o':
+ if (arg_output) {
+ log_error("cannot set output more than once");
+ return -EINVAL;
+ }
+
+ arg_output = fopen(optarg, "we");
+ if (!arg_output)
+ return log_error_errno(errno, "writing to '%s': %m", optarg);
+
+ break;
+
+ case 'F':
+ if (arg_field) {
+ log_error("cannot use --field/-F more than once");
+ return -EINVAL;
+ }
+ arg_field = optarg;
+ break;
+
+ case '1':
+ arg_one = true;
+ break;
+
+ case 'D':
+ arg_directory = optarg;
+ break;
+
+ case '?':
+ return -EINVAL;
+
+ default:
+ assert_not_reached("Unhandled option");
+ }
+
+ if (optind < argc) {
+ const char *cmd = argv[optind++];
+ if (streq(cmd, "list"))
+ arg_action = ACTION_LIST;
+ else if (streq(cmd, "dump"))
+ arg_action = ACTION_DUMP;
+ else if (streq(cmd, "gdb"))
+ arg_action = ACTION_GDB;
+ else if (streq(cmd, "info"))
+ arg_action = ACTION_INFO;
+ else {
+ log_error("Unknown action '%s'", cmd);
+ return -EINVAL;
+ }
+ }
+
+ if (arg_field && arg_action != ACTION_LIST) {
+ log_error("Option --field/-F only makes sense with list");
+ return -EINVAL;
+ }
+
+ while (optind < argc) {
+ r = add_match(matches, argv[optind]);
+ if (r != 0)
+ return r;
+ optind++;
+ }
+
+ return 0;
+}
+
+static int retrieve(const void *data,
+ size_t len,
+ const char *name,
+ char **var) {
+
+ size_t ident;
+ char *v;
+
+ ident = strlen(name) + 1; /* name + "=" */
+
+ if (len < ident)
+ return 0;
+
+ if (memcmp(data, name, ident - 1) != 0)
+ return 0;
+
+ if (((const char*) data)[ident - 1] != '=')
+ return 0;
+
+ v = strndup((const char*)data + ident, len - ident);
+ if (!v)
+ return log_oom();
+
+ free(*var);
+ *var = v;
+
+ return 0;
+}
+
+static void print_field(FILE* file, sd_journal *j) {
+ _cleanup_free_ char *value = NULL;
+ const void *d;
+ size_t l;
+
+ assert(file);
+ assert(j);
+
+ assert(arg_field);
+
+ SD_JOURNAL_FOREACH_DATA(j, d, l)
+ retrieve(d, l, arg_field, &value);
+
+ if (value)
+ fprintf(file, "%s\n", value);
+}
+
+static int print_list(FILE* file, sd_journal *j, int had_legend) {
+ _cleanup_free_ char
+ *pid = NULL, *uid = NULL, *gid = NULL,
+ *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL,
+ *filename = NULL;
+ const void *d;
+ size_t l;
+ usec_t t;
+ char buf[FORMAT_TIMESTAMP_MAX];
+ int r;
+ bool present;
+
+ assert(file);
+ assert(j);
+
+ SD_JOURNAL_FOREACH_DATA(j, d, l) {
+ retrieve(d, l, "COREDUMP_PID", &pid);
+ retrieve(d, l, "COREDUMP_UID", &uid);
+ retrieve(d, l, "COREDUMP_GID", &gid);
+ retrieve(d, l, "COREDUMP_SIGNAL", &sgnl);
+ retrieve(d, l, "COREDUMP_EXE", &exe);
+ retrieve(d, l, "COREDUMP_COMM", &comm);
+ retrieve(d, l, "COREDUMP_CMDLINE", &cmdline);
+ retrieve(d, l, "COREDUMP_FILENAME", &filename);
+ }
+
+ if (!pid && !uid && !gid && !sgnl && !exe && !comm && !cmdline && !filename) {
+ log_warning("Empty coredump log entry");
+ return -EINVAL;
+ }
+
+ r = sd_journal_get_realtime_usec(j, &t);
+ if (r < 0)
+ return log_error_errno(r, "Failed to get realtime timestamp: %m");
+
+ format_timestamp(buf, sizeof(buf), t);
+ present = filename && access(filename, F_OK) == 0;
+
+ if (!had_legend && !arg_no_legend)
+ fprintf(file, "%-*s %*s %*s %*s %*s %*s %s\n",
+ FORMAT_TIMESTAMP_WIDTH, "TIME",
+ 6, "PID",
+ 5, "UID",
+ 5, "GID",
+ 3, "SIG",
+ 1, "PRESENT",
+ "EXE");
+
+ fprintf(file, "%-*s %*s %*s %*s %*s %*s %s\n",
+ FORMAT_TIMESTAMP_WIDTH, buf,
+ 6, strna(pid),
+ 5, strna(uid),
+ 5, strna(gid),
+ 3, strna(sgnl),
+ 1, present ? "*" : "",
+ strna(exe ?: (comm ?: cmdline)));
+
+ return 0;
+}
+
+static int print_info(FILE *file, sd_journal *j, bool need_space) {
+ _cleanup_free_ char
+ *pid = NULL, *uid = NULL, *gid = NULL,
+ *sgnl = NULL, *exe = NULL, *comm = NULL, *cmdline = NULL,
+ *unit = NULL, *user_unit = NULL, *session = NULL,
+ *boot_id = NULL, *machine_id = NULL, *hostname = NULL,
+ *slice = NULL, *cgroup = NULL, *owner_uid = NULL,
+ *message = NULL, *timestamp = NULL, *filename = NULL;
+ const void *d;
+ size_t l;
+ int r;
+
+ assert(file);
+ assert(j);
+
+ SD_JOURNAL_FOREACH_DATA(j, d, l) {
+ retrieve(d, l, "COREDUMP_PID", &pid);
+ retrieve(d, l, "COREDUMP_UID", &uid);
+ retrieve(d, l, "COREDUMP_GID", &gid);
+ retrieve(d, l, "COREDUMP_SIGNAL", &sgnl);
+ retrieve(d, l, "COREDUMP_EXE", &exe);
+ retrieve(d, l, "COREDUMP_COMM", &comm);
+ retrieve(d, l, "COREDUMP_CMDLINE", &cmdline);
+ retrieve(d, l, "COREDUMP_UNIT", &unit);
+ retrieve(d, l, "COREDUMP_USER_UNIT", &user_unit);
+ retrieve(d, l, "COREDUMP_SESSION", &session);
+ retrieve(d, l, "COREDUMP_OWNER_UID", &owner_uid);
+ retrieve(d, l, "COREDUMP_SLICE", &slice);
+ retrieve(d, l, "COREDUMP_CGROUP", &cgroup);
+ retrieve(d, l, "COREDUMP_TIMESTAMP", &timestamp);
+ retrieve(d, l, "COREDUMP_FILENAME", &filename);
+ retrieve(d, l, "_BOOT_ID", &boot_id);
+ retrieve(d, l, "_MACHINE_ID", &machine_id);
+ retrieve(d, l, "_HOSTNAME", &hostname);
+ retrieve(d, l, "MESSAGE", &message);
+ }
+
+ if (need_space)
+ fputs("\n", file);
+
+ if (comm)
+ fprintf(file,
+ " PID: %s%s%s (%s)\n",
+ ansi_highlight(), strna(pid), ansi_normal(), comm);
+ else
+ fprintf(file,
+ " PID: %s%s%s\n",
+ ansi_highlight(), strna(pid), ansi_normal());
+
+ if (uid) {
+ uid_t n;
+
+ if (parse_uid(uid, &n) >= 0) {
+ _cleanup_free_ char *u = NULL;
+
+ u = uid_to_name(n);
+ fprintf(file,
+ " UID: %s (%s)\n",
+ uid, u);
+ } else {
+ fprintf(file,
+ " UID: %s\n",
+ uid);
+ }
+ }
+
+ if (gid) {
+ gid_t n;
+
+ if (parse_gid(gid, &n) >= 0) {
+ _cleanup_free_ char *g = NULL;
+
+ g = gid_to_name(n);
+ fprintf(file,
+ " GID: %s (%s)\n",
+ gid, g);
+ } else {
+ fprintf(file,
+ " GID: %s\n",
+ gid);
+ }
+ }
+
+ if (sgnl) {
+ int sig;
+
+ if (safe_atoi(sgnl, &sig) >= 0)
+ fprintf(file, " Signal: %s (%s)\n", sgnl, signal_to_string(sig));
+ else
+ fprintf(file, " Signal: %s\n", sgnl);
+ }
+
+ if (timestamp) {
+ usec_t u;
+
+ r = safe_atou64(timestamp, &u);
+ if (r >= 0) {
+ char absolute[FORMAT_TIMESTAMP_MAX], relative[FORMAT_TIMESPAN_MAX];
+
+ fprintf(file,
+ " Timestamp: %s (%s)\n",
+ format_timestamp(absolute, sizeof(absolute), u),
+ format_timestamp_relative(relative, sizeof(relative), u));
+
+ } else
+ fprintf(file, " Timestamp: %s\n", timestamp);
+ }
+
+ if (cmdline)
+ fprintf(file, " Command Line: %s\n", cmdline);
+ if (exe)
+ fprintf(file, " Executable: %s%s%s\n", ansi_highlight(), exe, ansi_normal());
+ if (cgroup)
+ fprintf(file, " Control Group: %s\n", cgroup);
+ if (unit)
+ fprintf(file, " Unit: %s\n", unit);
+ if (user_unit)
+ fprintf(file, " User Unit: %s\n", unit);
+ if (slice)
+ fprintf(file, " Slice: %s\n", slice);
+ if (session)
+ fprintf(file, " Session: %s\n", session);
+ if (owner_uid) {
+ uid_t n;
+
+ if (parse_uid(owner_uid, &n) >= 0) {
+ _cleanup_free_ char *u = NULL;
+
+ u = uid_to_name(n);
+ fprintf(file,
+ " Owner UID: %s (%s)\n",
+ owner_uid, u);
+ } else {
+ fprintf(file,
+ " Owner UID: %s\n",
+ owner_uid);
+ }
+ }
+ if (boot_id)
+ fprintf(file, " Boot ID: %s\n", boot_id);
+ if (machine_id)
+ fprintf(file, " Machine ID: %s\n", machine_id);
+ if (hostname)
+ fprintf(file, " Hostname: %s\n", hostname);
+
+ if (filename && access(filename, F_OK) == 0)
+ fprintf(file, " Coredump: %s\n", filename);
+
+ if (message) {
+ _cleanup_free_ char *m = NULL;
+
+ m = strreplace(message, "\n", "\n ");
+
+ fprintf(file, " Message: %s\n", strstrip(m ?: message));
+ }
+
+ return 0;
+}
+
+static int focus(sd_journal *j) {
+ int r;
+
+ r = sd_journal_seek_tail(j);
+ if (r == 0)
+ r = sd_journal_previous(j);
+ if (r < 0)
+ return log_error_errno(r, "Failed to search journal: %m");
+ if (r == 0) {
+ log_error("No match found.");
+ return -ESRCH;
+ }
+ return r;
+}
+
+static void print_entry(sd_journal *j, unsigned n_found) {
+ assert(j);
+
+ if (arg_action == ACTION_INFO)
+ print_info(stdout, j, n_found);
+ else if (arg_field)
+ print_field(stdout, j);
+ else
+ print_list(stdout, j, n_found);
+}
+
+static int dump_list(sd_journal *j) {
+ unsigned n_found = 0;
+ int r;
+
+ assert(j);
+
+ /* The coredumps are likely to compressed, and for just
+ * listing them we don't need to decompress them, so let's
+ * pick a fairly low data threshold here */
+ sd_journal_set_data_threshold(j, 4096);
+
+ if (arg_one) {
+ r = focus(j);
+ if (r < 0)
+ return r;
+
+ print_entry(j, 0);
+ } else {
+ SD_JOURNAL_FOREACH(j)
+ print_entry(j, n_found++);
+
+ if (!arg_field && n_found <= 0) {
+ log_notice("No coredumps found.");
+ return -ESRCH;
+ }
+ }
+
+ return 0;
+}
+
+static int save_core(sd_journal *j, int fd, char **path, bool *unlink_temp) {
+ const char *data;
+ _cleanup_free_ char *filename = NULL;
+ size_t len;
+ int r;
+
+ assert((fd >= 0) != !!path);
+ assert(!!path == !!unlink_temp);
+
+ /* Prefer uncompressed file to journal (probably cached) to
+ * compressed file (probably uncached). */
+ r = sd_journal_get_data(j, "COREDUMP_FILENAME", (const void**) &data, &len);
+ if (r < 0 && r != -ENOENT)
+ log_warning_errno(r, "Failed to retrieve COREDUMP_FILENAME: %m");
+ else if (r == 0)
+ retrieve(data, len, "COREDUMP_FILENAME", &filename);
+
+ if (filename && access(filename, R_OK) < 0) {
+ log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
+ "File %s is not readable: %m", filename);
+ filename = mfree(filename);
+ }
+
+ if (filename && !endswith(filename, ".xz") && !endswith(filename, ".lz4")) {
+ if (path) {
+ *path = filename;
+ filename = NULL;
+ }
+
+ return 0;
+ } else {
+ _cleanup_close_ int fdt = -1;
+ char *temp = NULL;
+
+ if (fd < 0) {
+ temp = strdup("/var/tmp/coredump-XXXXXX");
+ if (!temp)
+ return log_oom();
+
+ fdt = mkostemp_safe(temp, O_WRONLY|O_CLOEXEC);
+ if (fdt < 0)
+ return log_error_errno(fdt, "Failed to create temporary file: %m");
+ log_debug("Created temporary file %s", temp);
+
+ fd = fdt;
+ }
+
+ r = sd_journal_get_data(j, "COREDUMP", (const void**) &data, &len);
+ if (r == 0) {
+ ssize_t sz;
+
+ assert(len >= 9);
+ data += 9;
+ len -= 9;
+
+ sz = write(fdt, data, len);
+ if (sz < 0) {
+ r = log_error_errno(errno,
+ "Failed to write temporary file: %m");
+ goto error;
+ }
+ if (sz != (ssize_t) len) {
+ log_error("Short write to temporary file.");
+ r = -EIO;
+ goto error;
+ }
+ } else if (filename) {
+#if defined(HAVE_XZ) || defined(HAVE_LZ4)
+ _cleanup_close_ int fdf;
+
+ fdf = open(filename, O_RDONLY | O_CLOEXEC);
+ if (fdf < 0) {
+ r = log_error_errno(errno,
+ "Failed to open %s: %m",
+ filename);
+ goto error;
+ }
+
+ r = decompress_stream(filename, fdf, fd, -1);
+ if (r < 0) {
+ log_error_errno(r, "Failed to decompress %s: %m", filename);
+ goto error;
+ }
+#else
+ log_error("Cannot decompress file. Compiled without compression support.");
+ r = -EOPNOTSUPP;
+ goto error;
+#endif
+ } else {
+ if (r == -ENOENT)
+ log_error("Cannot retrieve coredump from journal nor disk.");
+ else
+ log_error_errno(r, "Failed to retrieve COREDUMP field: %m");
+ goto error;
+ }
+
+ if (temp) {
+ *path = temp;
+ *unlink_temp = true;
+ }
+
+ return 0;
+
+error:
+ if (temp) {
+ unlink(temp);
+ log_debug("Removed temporary file %s", temp);
+ }
+ return r;
+ }
+}
+
+static int dump_core(sd_journal* j) {
+ int r;
+
+ assert(j);
+
+ r = focus(j);
+ if (r < 0)
+ return r;
+
+ print_info(arg_output ? stdout : stderr, j, false);
+
+ if (on_tty() && !arg_output) {
+ log_error("Refusing to dump core to tty.");
+ return -ENOTTY;
+ }
+
+ r = save_core(j, arg_output ? fileno(arg_output) : STDOUT_FILENO, NULL, NULL);
+ if (r < 0)
+ return log_error_errno(r, "Coredump retrieval failed: %m");
+
+ r = sd_journal_previous(j);
+ if (r >= 0)
+ log_warning("More than one entry matches, ignoring rest.");
+
+ return 0;
+}
+
+static int run_gdb(sd_journal *j) {
+ _cleanup_free_ char *exe = NULL, *path = NULL;
+ bool unlink_path = false;
+ const char *data;
+ siginfo_t st;
+ size_t len;
+ pid_t pid;
+ int r;
+
+ assert(j);
+
+ r = focus(j);
+ if (r < 0)
+ return r;
+
+ print_info(stdout, j, false);
+ fputs("\n", stdout);
+
+ r = sd_journal_get_data(j, "COREDUMP_EXE", (const void**) &data, &len);
+ if (r < 0)
+ return log_error_errno(r, "Failed to retrieve COREDUMP_EXE field: %m");
+
+ assert(len > strlen("COREDUMP_EXE="));
+ data += strlen("COREDUMP_EXE=");
+ len -= strlen("COREDUMP_EXE=");
+
+ exe = strndup(data, len);
+ if (!exe)
+ return log_oom();
+
+ if (endswith(exe, " (deleted)")) {
+ log_error("Binary already deleted.");
+ return -ENOENT;
+ }
+
+ if (!path_is_absolute(exe)) {
+ log_error("Binary is not an absolute path.");
+ return -ENOENT;
+ }
+
+ r = save_core(j, -1, &path, &unlink_path);
+ if (r < 0)
+ return log_error_errno(r, "Failed to retrieve core: %m");
+
+ pid = fork();
+ if (pid < 0) {
+ r = log_error_errno(errno, "Failed to fork(): %m");
+ goto finish;
+ }
+ if (pid == 0) {
+ (void) reset_all_signal_handlers();
+ (void) reset_signal_mask();
+
+ execlp("gdb", "gdb", exe, path, NULL);
+
+ log_error_errno(errno, "Failed to invoke gdb: %m");
+ _exit(1);
+ }
+
+ r = wait_for_terminate(pid, &st);
+ if (r < 0) {
+ log_error_errno(r, "Failed to wait for gdb: %m");
+ goto finish;
+ }
+
+ r = st.si_code == CLD_EXITED ? st.si_status : 255;
+
+finish:
+ if (unlink_path) {
+ log_debug("Removed temporary file %s", path);
+ unlink(path);
+ }
+
+ return r;
+}
+
+int main(int argc, char *argv[]) {
+ _cleanup_(sd_journal_closep) sd_journal*j = NULL;
+ const char* match;
+ Iterator it;
+ int r = 0;
+ _cleanup_set_free_free_ Set *matches = NULL;
+
+ setlocale(LC_ALL, "");
+ log_parse_environment();
+ log_open();
+
+ matches = new_matches();
+ if (!matches) {
+ r = -ENOMEM;
+ goto end;
+ }
+
+ r = parse_argv(argc, argv, matches);
+ if (r < 0)
+ goto end;
+
+ if (arg_action == ACTION_NONE)
+ goto end;
+
+ sigbus_install();
+
+ if (arg_directory) {
+ r = sd_journal_open_directory(&j, arg_directory, 0);
+ if (r < 0) {
+ log_error_errno(r, "Failed to open journals in directory: %s: %m", arg_directory);
+ goto end;
+ }
+ } else {
+ r = sd_journal_open(&j, SD_JOURNAL_LOCAL_ONLY);
+ if (r < 0) {
+ log_error_errno(r, "Failed to open journal: %m");
+ goto end;
+ }
+ }
+
+ /* We want full data, nothing truncated. */
+ sd_journal_set_data_threshold(j, 0);
+
+ SET_FOREACH(match, matches, it) {
+ r = sd_journal_add_match(j, match, strlen(match));
+ if (r != 0) {
+ log_error_errno(r, "Failed to add match '%s': %m",
+ match);
+ goto end;
+ }
+ }
+
+ if (_unlikely_(log_get_max_level() >= LOG_DEBUG)) {
+ _cleanup_free_ char *filter;
+
+ filter = journal_make_match_string(j);
+ log_debug("Journal filter: %s", filter);
+ }
+
+ switch(arg_action) {
+
+ case ACTION_LIST:
+ case ACTION_INFO:
+ if (!arg_no_pager)
+ pager_open(false);
+
+ r = dump_list(j);
+ break;
+
+ case ACTION_DUMP:
+ r = dump_core(j);
+ break;
+
+ case ACTION_GDB:
+ r = run_gdb(j);
+ break;
+
+ default:
+ assert_not_reached("Shouldn't be here");
+ }
+
+end:
+ pager_close();
+
+ if (arg_output)
+ fclose(arg_output);
+
+ return r >= 0 ? r : EXIT_FAILURE;
+}
diff --git a/src/coredump/stacktrace.c b/src/coredump/stacktrace.c
new file mode 100644
index 0000000000..68806992fc
--- /dev/null
+++ b/src/coredump/stacktrace.c
@@ -0,0 +1,200 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Lennart Poettering
+
+ systemd 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; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <dwarf.h>
+#include <elfutils/libdwfl.h>
+
+#include "alloc-util.h"
+#include "fd-util.h"
+#include "formats-util.h"
+#include "macro.h"
+#include "stacktrace.h"
+#include "string-util.h"
+#include "util.h"
+
+#define FRAMES_MAX 64
+#define THREADS_MAX 64
+
+struct stack_context {
+ FILE *f;
+ Dwfl *dwfl;
+ Elf *elf;
+ unsigned n_thread;
+ unsigned n_frame;
+};
+
+static int frame_callback(Dwfl_Frame *frame, void *userdata) {
+ struct stack_context *c = userdata;
+ Dwarf_Addr pc, pc_adjusted, bias = 0;
+ _cleanup_free_ Dwarf_Die *scopes = NULL;
+ const char *fname = NULL, *symbol = NULL;
+ Dwfl_Module *module;
+ bool is_activation;
+
+ assert(frame);
+ assert(c);
+
+ if (c->n_frame >= FRAMES_MAX)
+ return DWARF_CB_ABORT;
+
+ if (!dwfl_frame_pc(frame, &pc, &is_activation))
+ return DWARF_CB_ABORT;
+
+ pc_adjusted = pc - (is_activation ? 0 : 1);
+
+ module = dwfl_addrmodule(c->dwfl, pc_adjusted);
+ if (module) {
+ Dwarf_Die *s, *cudie;
+ int n;
+
+ cudie = dwfl_module_addrdie(module, pc_adjusted, &bias);
+ if (cudie) {
+ n = dwarf_getscopes(cudie, pc_adjusted - bias, &scopes);
+ for (s = scopes; s < scopes + n; s++) {
+ if (IN_SET(dwarf_tag(s), DW_TAG_subprogram, DW_TAG_inlined_subroutine, DW_TAG_entry_point)) {
+ Dwarf_Attribute *a, space;
+
+ a = dwarf_attr_integrate(s, DW_AT_MIPS_linkage_name, &space);
+ if (!a)
+ a = dwarf_attr_integrate(s, DW_AT_linkage_name, &space);
+ if (a)
+ symbol = dwarf_formstring(a);
+ if (!symbol)
+ symbol = dwarf_diename(s);
+
+ if (symbol)
+ break;
+ }
+ }
+ }
+
+ if (!symbol)
+ symbol = dwfl_module_addrname(module, pc_adjusted);
+
+ fname = dwfl_module_info(module, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
+ }
+
+ fprintf(c->f, "#%-2u 0x%016" PRIx64 " %s (%s)\n", c->n_frame, (uint64_t) pc, strna(symbol), strna(fname));
+ c->n_frame ++;
+
+ return DWARF_CB_OK;
+}
+
+static int thread_callback(Dwfl_Thread *thread, void *userdata) {
+ struct stack_context *c = userdata;
+ pid_t tid;
+
+ assert(thread);
+ assert(c);
+
+ if (c->n_thread >= THREADS_MAX)
+ return DWARF_CB_ABORT;
+
+ if (c->n_thread != 0)
+ fputc('\n', c->f);
+
+ c->n_frame = 0;
+
+ tid = dwfl_thread_tid(thread);
+ fprintf(c->f, "Stack trace of thread " PID_FMT ":\n", tid);
+
+ if (dwfl_thread_getframes(thread, frame_callback, c) < 0)
+ return DWARF_CB_ABORT;
+
+ c->n_thread ++;
+
+ return DWARF_CB_OK;
+}
+
+int coredump_make_stack_trace(int fd, const char *executable, char **ret) {
+
+ static const Dwfl_Callbacks callbacks = {
+ .find_elf = dwfl_build_id_find_elf,
+ .find_debuginfo = dwfl_standard_find_debuginfo,
+ };
+
+ struct stack_context c = {};
+ char *buf = NULL;
+ size_t sz = 0;
+ int r;
+
+ assert(fd >= 0);
+ assert(ret);
+
+ if (lseek(fd, 0, SEEK_SET) == (off_t) -1)
+ return -errno;
+
+ c.f = open_memstream(&buf, &sz);
+ if (!c.f)
+ return -ENOMEM;
+
+ elf_version(EV_CURRENT);
+
+ c.elf = elf_begin(fd, ELF_C_READ_MMAP, NULL);
+ if (!c.elf) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ c.dwfl = dwfl_begin(&callbacks);
+ if (!c.dwfl) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ if (dwfl_core_file_report(c.dwfl, c.elf, executable) < 0) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ if (dwfl_report_end(c.dwfl, NULL, NULL) != 0) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ if (dwfl_core_file_attach(c.dwfl, c.elf) < 0) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ if (dwfl_getthreads(c.dwfl, thread_callback, &c) < 0) {
+ r = -EINVAL;
+ goto finish;
+ }
+
+ c.f = safe_fclose(c.f);
+
+ *ret = buf;
+ buf = NULL;
+
+ r = 0;
+
+finish:
+ if (c.dwfl)
+ dwfl_end(c.dwfl);
+
+ if (c.elf)
+ elf_end(c.elf);
+
+ safe_fclose(c.f);
+
+ free(buf);
+
+ return r;
+}
diff --git a/src/coredump/stacktrace.h b/src/coredump/stacktrace.h
new file mode 100644
index 0000000000..15e9c04465
--- /dev/null
+++ b/src/coredump/stacktrace.h
@@ -0,0 +1,22 @@
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Lennart Poettering
+
+ systemd 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; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+int coredump_make_stack_trace(int fd, const char *executable, char **ret);
diff --git a/src/coredump/test-coredump-vacuum.c b/src/coredump/test-coredump-vacuum.c
new file mode 100644
index 0000000000..70a57f183f
--- /dev/null
+++ b/src/coredump/test-coredump-vacuum.c
@@ -0,0 +1,30 @@
+/***
+ This file is part of systemd.
+
+ Copyright 2012 Zbigniew Jędrzejewski-Szmek
+
+ systemd 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; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <stdlib.h>
+
+#include "coredump-vacuum.h"
+
+int main(int argc, char *argv[]) {
+
+ if (coredump_vacuum(-1, (uint64_t) -1, 70 * 1024) < 0)
+ return EXIT_FAILURE;
+
+ return EXIT_SUCCESS;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-12-01 05:36:14 +0000