diff options
Diffstat (limited to 'src/coredump')
| l--------- | src/coredump/Makefile | 1 | ||||
| -rw-r--r-- | src/coredump/coredump-vacuum.c | 268 | ||||
| -rw-r--r-- | src/coredump/coredump-vacuum.h | 25 | ||||
| -rw-r--r-- | src/coredump/coredump.c | 1185 | ||||
| -rw-r--r-- | src/coredump/coredump.conf | 21 | ||||
| -rw-r--r-- | src/coredump/coredumpctl.c | 878 | ||||
| -rw-r--r-- | src/coredump/stacktrace.c | 200 | ||||
| -rw-r--r-- | src/coredump/stacktrace.h | 22 | ||||
| -rw-r--r-- | src/coredump/test-coredump-vacuum.c | 30 |
9 files changed, 0 insertions, 2630 deletions
diff --git a/src/coredump/Makefile b/src/coredump/Makefile deleted file mode 120000 index d0b0e8e008..0000000000 --- a/src/coredump/Makefile +++ /dev/null @@ -1 +0,0 @@ -../Makefile
\ No newline at end of file diff --git a/src/coredump/coredump-vacuum.c b/src/coredump/coredump-vacuum.c deleted file mode 100644 index f02b6dbd87..0000000000 --- a/src/coredump/coredump-vacuum.c +++ /dev/null @@ -1,268 +0,0 @@ -/*** - 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 deleted file mode 100644 index 4b7b9f2d98..0000000000 --- a/src/coredump/coredump-vacuum.h +++ /dev/null @@ -1,25 +0,0 @@ -#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 deleted file mode 100644 index dcc09fcc6d..0000000000 --- a/src/coredump/coredump.c +++ /dev/null @@ -1,1185 +0,0 @@ -/*** - 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 "sd-daemon.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 "missing.h" -#include "mkdir.h" -#include "parse-util.h" -#include "process-util.h" -#include "socket-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 { - /* We use this as array indexes for a couple of special fields we use for naming coredumping files, and - * attaching xattrs */ - CONTEXT_PID, - CONTEXT_UID, - CONTEXT_GID, - CONTEXT_SIGNAL, - CONTEXT_TIMESTAMP, - CONTEXT_RLIMIT, - CONTEXT_COMM, - CONTEXT_EXE, - _CONTEXT_MAX -}; - -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) - return log_error_errno(errno, "Failed to patch ACL: %m"); - - 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 *context[_CONTEXT_MAX]) { - - static const char * const xattrs[_CONTEXT_MAX] = { - [CONTEXT_PID] = "user.coredump.pid", - [CONTEXT_UID] = "user.coredump.uid", - [CONTEXT_GID] = "user.coredump.gid", - [CONTEXT_SIGNAL] = "user.coredump.signal", - [CONTEXT_TIMESTAMP] = "user.coredump.timestamp", - [CONTEXT_COMM] = "user.coredump.comm", - [CONTEXT_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 < _CONTEXT_MAX; i++) { - int k; - - if (isempty(context[i]) || !xattrs[i]) - continue; - - k = fsetxattr(fd, xattrs[i], context[i], strlen(context[i]), XATTR_CREATE); - if (k < 0 && r == 0) - r = -errno; - } - - return r; -} - -#define filename_escape(s) xescape((s), "./ ") - -static inline const char *coredump_tmpfile_name(const char *s) { - return s ? s : "(unnamed temporary file)"; -} - -static int fix_permissions( - int fd, - const char *filename, - const char *target, - const char *context[_CONTEXT_MAX], - uid_t uid) { - - int r; - - assert(fd >= 0); - assert(target); - assert(context); - - /* Ignore errors on these */ - (void) fchmod(fd, 0640); - (void) fix_acl(fd, uid); - (void) fix_xattr(fd, context); - - if (fsync(fd) < 0) - return log_error_errno(errno, "Failed to sync coredump %s: %m", coredump_tmpfile_name(filename)); - - r = link_tmpfile(fd, filename, target); - if (r < 0) - return log_error_errno(r, "Failed to move coredump %s into place: %m", 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 *context[_CONTEXT_MAX], char **ret) { - _cleanup_free_ char *c = NULL, *u = NULL, *p = NULL, *t = NULL; - sd_id128_t boot = {}; - int r; - - assert(context); - - c = filename_escape(context[CONTEXT_COMM]); - if (!c) - return -ENOMEM; - - u = filename_escape(context[CONTEXT_UID]); - if (!u) - return -ENOMEM; - - r = sd_id128_get_boot(&boot); - if (r < 0) - return r; - - p = filename_escape(context[CONTEXT_PID]); - if (!p) - return -ENOMEM; - - t = filename_escape(context[CONTEXT_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 *context[_CONTEXT_MAX], - int input_fd, - 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; - uint64_t rlimit, max_size; - struct stat st; - uid_t uid; - int r; - - assert(context); - assert(ret_filename); - assert(ret_node_fd); - assert(ret_data_fd); - assert(ret_size); - - r = parse_uid(context[CONTEXT_UID], &uid); - if (r < 0) - return log_error_errno(r, "Failed to parse UID: %m"); - - r = safe_atou64(context[CONTEXT_RLIMIT], &rlimit); - if (r < 0) - return log_error_errno(r, "Failed to parse resource limit: %s", context[CONTEXT_RLIMIT]); - if (rlimit <= 0) { - /* Is coredumping disabled? Then don't bother saving/processing the coredump */ - log_info("Core Dumping has been disabled for process %s (%s).", context[CONTEXT_PID], context[CONTEXT_COMM]); - return -EBADSLT; - } - - /* Never store more than the process configured, or than we actually shall keep or process */ - max_size = MIN(rlimit, MAX(arg_process_size_max, arg_external_size_max)); - - r = make_filename(context, &fn); - if (r < 0) - return log_error_errno(r, "Failed to determine coredump file name: %m"); - - mkdir_p_label("/var/lib/systemd/coredump", 0755); - - fd = open_tmpfile_linkable(fn, O_RDWR|O_CLOEXEC, &tmp); - if (fd < 0) - return log_error_errno(fd, "Failed to create temporary file for coredump %s: %m", fn); - - r = copy_bytes(input_fd, fd, max_size, false); - if (r == -EFBIG) { - log_error("Coredump of %s (%s) is larger than configured processing limit, refusing.", context[CONTEXT_PID], context[CONTEXT_COMM]); - goto fail; - } else if (IN_SET(r, -EDQUOT, -ENOSPC)) { - log_error("Not enough disk space for coredump of %s (%s), refusing.", context[CONTEXT_PID], context[CONTEXT_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", coredump_tmpfile_name(tmp)); - goto fail; - } - - if (lseek(fd, 0, SEEK_SET) == (off_t) -1) { - log_error_errno(errno, "Failed to seek on %s: %m", coredump_tmpfile_name(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; - } - - fd_compressed = open_tmpfile_linkable(fn_compressed, O_RDWR|O_CLOEXEC, &tmp_compressed); - if (fd_compressed < 0) { - log_error_errno(fd_compressed, "Failed to create temporary file for coredump %s: %m", fn_compressed); - goto uncompressed; - } - - r = compress_stream(fd, fd_compressed, -1); - if (r < 0) { - log_error_errno(r, "Failed to compress %s: %m", coredump_tmpfile_name(tmp_compressed)); - goto fail_compressed; - } - - r = fix_permissions(fd_compressed, tmp_compressed, fn_compressed, context, uid); - if (r < 0) - goto fail_compressed; - - /* OK, this worked, we can get rid of the uncompressed version now */ - if (tmp) - 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: - if (tmp_compressed) - (void) unlink(tmp_compressed); - } - -uncompressed: -#endif - - r = fix_permissions(fd, tmp, fn, context, 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: - if (tmp) - (void) unlink(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; -} - -static int change_uid_gid(const char *context[]) { - uid_t uid; - gid_t gid; - int r; - - r = parse_uid(context[CONTEXT_UID], &uid); - if (r < 0) - return r; - - if (uid <= SYSTEM_UID_MAX) { - const char *user = "systemd-coredump"; - - r = get_user_creds(&user, &uid, &gid, NULL, NULL); - if (r < 0) { - log_warning_errno(r, "Cannot resolve %s user. Proceeding to dump core as root: %m", user); - uid = gid = 0; - } - } else { - r = parse_gid(context[CONTEXT_GID], &gid); - if (r < 0) - return r; - } - - return drop_privileges(uid, gid, 0); -} - -static int submit_coredump( - const char *context[_CONTEXT_MAX], - struct iovec *iovec, - size_t n_iovec_allocated, - size_t n_iovec, - int input_fd) { - - _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; - _cleanup_free_ char *core_message = NULL, *filename = NULL, *coredump_data = NULL; - uint64_t coredump_size; - int r; - - assert(context); - assert(iovec); - assert(n_iovec_allocated >= n_iovec + 3); - assert(input_fd >= 0); - - /* Vacuum before we write anything again */ - (void) coredump_vacuum(-1, arg_keep_free, arg_max_use); - - /* Always stream the coredump to disk, if that's possible */ - r = save_external_coredump(context, input_fd, &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) - return r; - if (r == 0) { - const char *coredump_filename; - - coredump_filename = strjoina("COREDUMP_FILENAME=", filename); - IOVEC_SET_STRING(iovec[n_iovec++], coredump_filename); - } - - /* Vacuum again, but exclude the coredump we just created */ - (void) 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 = change_uid_gid(context); - if (r < 0) - return log_error_errno(r, "Failed to drop privileges: %m"); - -#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, context[CONTEXT_EXE], &stacktrace); - if (r >= 0) - core_message = strjoin("MESSAGE=Process ", context[CONTEXT_PID], " (", context[CONTEXT_COMM], ") of user ", context[CONTEXT_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 ", context[CONTEXT_PID], " (", context[CONTEXT_COMM], ") of user ", context[CONTEXT_UID], " dumped core.", NULL); - if (core_message) - IOVEC_SET_STRING(iovec[n_iovec++], 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[n_iovec].iov_base = coredump_data; - iovec[n_iovec].iov_len = sz; - n_iovec++; - } - } - - assert(n_iovec <= n_iovec_allocated); - - r = sd_journal_sendv(iovec, n_iovec); - if (r < 0) - return log_error_errno(r, "Failed to log coredump: %m"); - - return 0; -} - -static void map_context_fields(const struct iovec *iovec, const char *context[]) { - - static const char * const context_field_names[_CONTEXT_MAX] = { - [CONTEXT_PID] = "COREDUMP_PID=", - [CONTEXT_UID] = "COREDUMP_UID=", - [CONTEXT_GID] = "COREDUMP_GID=", - [CONTEXT_SIGNAL] = "COREDUMP_SIGNAL=", - [CONTEXT_TIMESTAMP] = "COREDUMP_TIMESTAMP=", - [CONTEXT_COMM] = "COREDUMP_COMM=", - [CONTEXT_EXE] = "COREDUMP_EXE=", - [CONTEXT_RLIMIT] = "COREDUMP_RLIMIT=", - }; - - unsigned i; - - assert(iovec); - assert(context); - - for (i = 0; i < _CONTEXT_MAX; i++) { - size_t l; - - l = strlen(context_field_names[i]); - if (iovec->iov_len < l) - continue; - - if (memcmp(iovec->iov_base, context_field_names[i], l) != 0) - continue; - - /* Note that these strings are NUL terminated, because we made sure that a trailing NUL byte is in the - * buffer, though not included in the iov_len count. (see below) */ - context[i] = (char*) iovec->iov_base + l; - break; - } -} - -static int process_socket(int fd) { - _cleanup_close_ int coredump_fd = -1; - struct iovec *iovec = NULL; - size_t n_iovec = 0, n_iovec_allocated = 0, i; - const char *context[_CONTEXT_MAX] = {}; - int r; - - assert(fd >= 0); - - log_set_target(LOG_TARGET_AUTO); - log_parse_environment(); - log_open(); - - for (;;) { - union { - struct cmsghdr cmsghdr; - uint8_t buf[CMSG_SPACE(sizeof(int))]; - } control = {}; - struct msghdr mh = { - .msg_control = &control, - .msg_controllen = sizeof(control), - .msg_iovlen = 1, - }; - ssize_t n; - ssize_t l; - - if (!GREEDY_REALLOC(iovec, n_iovec_allocated, n_iovec + 3)) { - r = log_oom(); - goto finish; - } - - l = next_datagram_size_fd(fd); - if (l < 0) { - r = log_error_errno(l, "Failed to determine datagram size to read: %m"); - goto finish; - } - - assert(l >= 0); - - iovec[n_iovec].iov_len = l; - iovec[n_iovec].iov_base = malloc(l + 1); - if (!iovec[n_iovec].iov_base) { - r = log_oom(); - goto finish; - } - - mh.msg_iov = iovec + n_iovec; - - n = recvmsg(fd, &mh, MSG_NOSIGNAL|MSG_CMSG_CLOEXEC); - if (n < 0) { - free(iovec[n_iovec].iov_base); - r = log_error_errno(errno, "Failed to receive datagram: %m"); - goto finish; - } - - if (n == 0) { - struct cmsghdr *cmsg, *found = NULL; - /* The final zero-length datagram carries the file descriptor and tells us that we're done. */ - - free(iovec[n_iovec].iov_base); - - CMSG_FOREACH(cmsg, &mh) { - if (cmsg->cmsg_level == SOL_SOCKET && - cmsg->cmsg_type == SCM_RIGHTS && - cmsg->cmsg_len == CMSG_LEN(sizeof(int))) { - assert(!found); - found = cmsg; - } - } - - if (!found) { - log_error("Coredump file descriptor missing."); - r = -EBADMSG; - goto finish; - } - - assert(coredump_fd < 0); - coredump_fd = *(int*) CMSG_DATA(found); - break; - } - - /* Add trailing NUL byte, in case these are strings */ - ((char*) iovec[n_iovec].iov_base)[n] = 0; - iovec[n_iovec].iov_len = (size_t) n; - - cmsg_close_all(&mh); - map_context_fields(iovec + n_iovec, context); - n_iovec++; - } - - if (!GREEDY_REALLOC(iovec, n_iovec_allocated, n_iovec + 3)) { - r = log_oom(); - goto finish; - } - - /* Make sure we got all data we really need */ - assert(context[CONTEXT_PID]); - assert(context[CONTEXT_UID]); - assert(context[CONTEXT_GID]); - assert(context[CONTEXT_SIGNAL]); - assert(context[CONTEXT_TIMESTAMP]); - assert(context[CONTEXT_RLIMIT]); - assert(context[CONTEXT_COMM]); - assert(coredump_fd >= 0); - - r = submit_coredump(context, iovec, n_iovec_allocated, n_iovec, coredump_fd); - -finish: - for (i = 0; i < n_iovec; i++) - free(iovec[i].iov_base); - free(iovec); - - return r; -} - -static int send_iovec(const struct iovec iovec[], size_t n_iovec, int input_fd) { - - static const union sockaddr_union sa = { - .un.sun_family = AF_UNIX, - .un.sun_path = "/run/systemd/coredump", - }; - _cleanup_close_ int fd = -1; - size_t i; - int r; - - assert(iovec || n_iovec <= 0); - assert(input_fd >= 0); - - fd = socket(AF_UNIX, SOCK_SEQPACKET|SOCK_CLOEXEC, 0); - if (fd < 0) - return log_error_errno(errno, "Failed to create coredump socket: %m"); - - if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) - return log_error_errno(errno, "Failed to connect to coredump service: %m"); - - for (i = 0; i < n_iovec; i++) { - struct msghdr mh = { - .msg_iov = (struct iovec*) iovec + i, - .msg_iovlen = 1, - }; - struct iovec copy[2]; - - for (;;) { - if (sendmsg(fd, &mh, MSG_NOSIGNAL) >= 0) - break; - - if (errno == EMSGSIZE && mh.msg_iov[0].iov_len > 0) { - /* This field didn't fit? That's a pity. Given that this is just metadata, - * let's truncate the field at half, and try again. We append three dots, in - * order to show that this is truncated. */ - - if (mh.msg_iov != copy) { - /* We don't want to modify the caller's iovec, hence let's create our - * own array, consisting of two new iovecs, where the first is a - * (truncated) copy of what we want to send, and the second one - * contains the trailing dots. */ - copy[0] = iovec[i]; - copy[1] = (struct iovec) { - .iov_base = (char[]) { '.', '.', '.' }, - .iov_len = 3, - }; - - mh.msg_iov = copy; - mh.msg_iovlen = 2; - } - - copy[0].iov_len /= 2; /* halve it, and try again */ - continue; - } - - return log_error_errno(errno, "Failed to send coredump datagram: %m"); - } - } - - r = send_one_fd(fd, input_fd, 0); - if (r < 0) - return log_error_errno(r, "Failed to send coredump fd: %m"); - - return 0; -} - -static int process_special_crash(const char *context[], int input_fd) { - _cleanup_close_ int coredump_fd = -1, coredump_node_fd = -1; - _cleanup_free_ char *filename = NULL; - uint64_t coredump_size; - int r; - - assert(context); - assert(input_fd >= 0); - - /* If we are pid1 or 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(context, input_fd, &filename, &coredump_node_fd, &coredump_fd, &coredump_size); - if (r < 0) - return r; - - r = maybe_remove_external_coredump(filename, coredump_size); - if (r < 0) - return r; - - log_notice("Detected coredump of the journal daemon or PID 1, diverted to %s.", filename); - - return 0; -} - -static int process_kernel(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_user_unit = NULL, *core_slice = NULL, *core_timestamp = NULL, *core_rlimit = NULL; - - /* The larger ones we allocate on the heap */ - _cleanup_free_ char - *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; - const char *context[_CONTEXT_MAX]; - struct iovec iovec[25]; - size_t n_iovec = 0; - uid_t owner_uid; - const char *p; - pid_t pid; - char *t; - int r; - - if (argc < CONTEXT_COMM + 1) { - log_error("Not enough arguments passed from kernel (%i, expected %i).", argc - 1, CONTEXT_COMM + 1 - 1); - return -EINVAL; - } - - r = parse_pid(argv[CONTEXT_PID + 1], &pid); - if (r < 0) - return log_error_errno(r, "Failed to parse PID."); - - r = get_process_comm(pid, &comm); - if (r < 0) { - log_warning_errno(r, "Failed to get COMM, falling back to the command line: %m"); - comm = strv_join(argv + CONTEXT_COMM + 1, " "); - if (!comm) - return log_oom(); - } - - r = get_process_exe(pid, &exe); - if (r < 0) - log_warning_errno(r, "Failed to get EXE, ignoring: %m"); - - context[CONTEXT_PID] = argv[CONTEXT_PID + 1]; - context[CONTEXT_UID] = argv[CONTEXT_UID + 1]; - context[CONTEXT_GID] = argv[CONTEXT_GID + 1]; - context[CONTEXT_SIGNAL] = argv[CONTEXT_SIGNAL + 1]; - context[CONTEXT_TIMESTAMP] = argv[CONTEXT_TIMESTAMP + 1]; - context[CONTEXT_RLIMIT] = argv[CONTEXT_RLIMIT + 1]; - context[CONTEXT_COMM] = comm; - context[CONTEXT_EXE] = exe; - - if (cg_pid_get_unit(pid, &t) >= 0) { - - /* If this is PID 1 disable coredump collection, we'll unlikely be able to process it later on. */ - if (streq(t, SPECIAL_INIT_SCOPE)) { - log_notice("Due to PID 1 having crashed coredump collection will now be turned off."); - (void) write_string_file("/proc/sys/kernel/core_pattern", "|/bin/false", 0); - } - - /* Let's avoid dead-locks when processing journald and init crashes, as socket activation and logging - * are unlikely to work then. */ - if (STR_IN_SET(t, SPECIAL_JOURNALD_SERVICE, SPECIAL_INIT_SCOPE)) { - free(t); - return process_special_crash(context, STDIN_FILENO); - } - - core_unit = strjoina("COREDUMP_UNIT=", t); - free(t); - - IOVEC_SET_STRING(iovec[n_iovec++], 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(); - - if (cg_pid_get_user_unit(pid, &t) >= 0) { - core_user_unit = strjoina("COREDUMP_USER_UNIT=", t); - free(t); - - IOVEC_SET_STRING(iovec[n_iovec++], core_user_unit); - } - - core_pid = strjoina("COREDUMP_PID=", context[CONTEXT_PID]); - IOVEC_SET_STRING(iovec[n_iovec++], core_pid); - - core_uid = strjoina("COREDUMP_UID=", context[CONTEXT_UID]); - IOVEC_SET_STRING(iovec[n_iovec++], core_uid); - - core_gid = strjoina("COREDUMP_GID=", context[CONTEXT_GID]); - IOVEC_SET_STRING(iovec[n_iovec++], core_gid); - - core_signal = strjoina("COREDUMP_SIGNAL=", context[CONTEXT_SIGNAL]); - IOVEC_SET_STRING(iovec[n_iovec++], core_signal); - - core_rlimit = strjoina("COREDUMP_RLIMIT=", context[CONTEXT_RLIMIT]); - IOVEC_SET_STRING(iovec[n_iovec++], core_rlimit); - - if (sd_pid_get_session(pid, &t) >= 0) { - core_session = strjoina("COREDUMP_SESSION=", t); - free(t); - - IOVEC_SET_STRING(iovec[n_iovec++], 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[n_iovec++], core_owner_uid); - } - - if (sd_pid_get_slice(pid, &t) >= 0) { - core_slice = strjoina("COREDUMP_SLICE=", t); - free(t); - - IOVEC_SET_STRING(iovec[n_iovec++], core_slice); - } - - if (comm) { - core_comm = strjoina("COREDUMP_COMM=", comm); - IOVEC_SET_STRING(iovec[n_iovec++], core_comm); - } - - if (exe) { - core_exe = strjoina("COREDUMP_EXE=", exe); - IOVEC_SET_STRING(iovec[n_iovec++], core_exe); - } - - if (get_process_cmdline(pid, 0, false, &t) >= 0) { - core_cmdline = strjoina("COREDUMP_CMDLINE=", t); - free(t); - - IOVEC_SET_STRING(iovec[n_iovec++], core_cmdline); - } - - if (cg_pid_get_path_shifted(pid, NULL, &t) >= 0) { - core_cgroup = strjoina("COREDUMP_CGROUP=", t); - free(t); - - IOVEC_SET_STRING(iovec[n_iovec++], 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[n_iovec++], 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[n_iovec++], 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[n_iovec++], 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[n_iovec++], 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[n_iovec++], core_proc_cgroup); - } - - if (get_process_cwd(pid, &t) >= 0) { - core_cwd = strjoina("COREDUMP_CWD=", t); - free(t); - - IOVEC_SET_STRING(iovec[n_iovec++], core_cwd); - } - - if (get_process_root(pid, &t) >= 0) { - core_root = strjoina("COREDUMP_ROOT=", t); - free(t); - - IOVEC_SET_STRING(iovec[n_iovec++], core_root); - } - - if (get_process_environ(pid, &t) >= 0) { - core_environ = strappend("COREDUMP_ENVIRON=", t); - free(t); - - if (core_environ) - IOVEC_SET_STRING(iovec[n_iovec++], core_environ); - } - - core_timestamp = strjoina("COREDUMP_TIMESTAMP=", context[CONTEXT_TIMESTAMP], "000000"); - IOVEC_SET_STRING(iovec[n_iovec++], core_timestamp); - - IOVEC_SET_STRING(iovec[n_iovec++], "MESSAGE_ID=fc2e22bc6ee647b6b90729ab34a250b1"); - - assert_cc(2 == LOG_CRIT); - IOVEC_SET_STRING(iovec[n_iovec++], "PRIORITY=2"); - - assert(n_iovec <= ELEMENTSOF(iovec)); - - return send_iovec(iovec, n_iovec, STDIN_FILENO); -} - -int main(int argc, char *argv[]) { - int r; - - /* 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(); - - /* Make sure we never enter a loop */ - (void) prctl(PR_SET_DUMPABLE, 0); - - /* Ignore all parse errors */ - (void) parse_config(); - - log_debug("Selected storage '%s'.", coredump_storage_to_string(arg_storage)); - log_debug("Selected compression %s.", yes_no(arg_compress)); - - r = sd_listen_fds(false); - if (r < 0) { - log_error_errno(r, "Failed to determine number of file descriptor: %m"); - goto finish; - } - - /* If we got an fd passed, we are running in coredumpd mode. Otherwise we are invoked from the kernel as - * coredump handler */ - if (r == 0) - r = process_kernel(argc, argv); - else if (r == 1) - r = process_socket(SD_LISTEN_FDS_START); - else { - log_error("Received unexpected number of file descriptors."); - r = -EINVAL; - } - -finish: - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; -} diff --git a/src/coredump/coredump.conf b/src/coredump/coredump.conf deleted file mode 100644 index c2f0643e03..0000000000 --- a/src/coredump/coredump.conf +++ /dev/null @@ -1,21 +0,0 @@ -# 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 deleted file mode 100644 index 27b1e0fb3f..0000000000 --- a/src/coredump/coredumpctl.c +++ /dev/null @@ -1,878 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2012 Zbigniew JÄ™drzejewski-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 bool 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", ×tamp); - 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 or 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: - pager_open(arg_no_pager, 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 deleted file mode 100644 index cc4dad9465..0000000000 --- a/src/coredump/stacktrace.c +++ /dev/null @@ -1,200 +0,0 @@ -/*** - 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 deleted file mode 100644 index 15e9c04465..0000000000 --- a/src/coredump/stacktrace.h +++ /dev/null @@ -1,22 +0,0 @@ -#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 deleted file mode 100644 index 70a57f183f..0000000000 --- a/src/coredump/test-coredump-vacuum.c +++ /dev/null @@ -1,30 +0,0 @@ -/*** - This file is part of systemd. - - Copyright 2012 Zbigniew JÄ™drzejewski-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; -} |