diff options
Diffstat (limited to 'tools/perf/util/dso.c')
| -rw-r--r-- | tools/perf/util/dso.c | 1341 |
1 files changed, 865 insertions, 476 deletions
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c index 62c8cf622607..344e689567ee 100644 --- a/tools/perf/util/dso.c +++ b/tools/perf/util/dso.c @@ -1,6 +1,8 @@ // SPDX-License-Identifier: GPL-2.0 #include <asm/bug.h> #include <linux/kernel.h> +#include <linux/string.h> +#include <linux/zalloc.h> #include <sys/time.h> #include <sys/resource.h> #include <sys/types.h> @@ -8,17 +10,28 @@ #include <unistd.h> #include <errno.h> #include <fcntl.h> +#include <stdlib.h> +#ifdef HAVE_LIBBPF_SUPPORT +#include <bpf/libbpf.h> +#include "bpf-event.h" +#include "bpf-utils.h" +#endif #include "compress.h" +#include "env.h" +#include "namespaces.h" #include "path.h" +#include "map.h" #include "symbol.h" #include "srcline.h" #include "dso.h" +#include "dsos.h" #include "machine.h" #include "auxtrace.h" -#include "util.h" +#include "util.h" /* O_CLOEXEC for older systems */ #include "debug.h" #include "string2.h" #include "vdso.h" +#include "annotate-data.h" static const char * const debuglink_paths[] = { "%.0s%s", @@ -27,6 +40,12 @@ static const char * const debuglink_paths[] = { "/usr/lib/debug%s/%s" }; +void dso__set_nsinfo(struct dso *dso, struct nsinfo *nsi) +{ + nsinfo__put(RC_CHK_ACCESS(dso)->nsinfo); + RC_CHK_ACCESS(dso)->nsinfo = nsi; +} + char dso__symtab_origin(const struct dso *dso) { static const char origin[] = { @@ -38,6 +57,7 @@ char dso__symtab_origin(const struct dso *dso) [DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO] = 'D', [DSO_BINARY_TYPE__FEDORA_DEBUGINFO] = 'f', [DSO_BINARY_TYPE__UBUNTU_DEBUGINFO] = 'u', + [DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO] = 'x', [DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO] = 'o', [DSO_BINARY_TYPE__BUILDID_DEBUGINFO] = 'b', [DSO_BINARY_TYPE__SYSTEM_PATH_DSO] = 'd', @@ -47,11 +67,46 @@ char dso__symtab_origin(const struct dso *dso) [DSO_BINARY_TYPE__GUEST_KMODULE] = 'G', [DSO_BINARY_TYPE__GUEST_KMODULE_COMP] = 'M', [DSO_BINARY_TYPE__GUEST_VMLINUX] = 'V', + [DSO_BINARY_TYPE__GNU_DEBUGDATA] = 'n', }; - if (dso == NULL || dso->symtab_type == DSO_BINARY_TYPE__NOT_FOUND) + if (dso == NULL || dso__symtab_type(dso) == DSO_BINARY_TYPE__NOT_FOUND) return '!'; - return origin[dso->symtab_type]; + return origin[dso__symtab_type(dso)]; +} + +bool dso__is_object_file(const struct dso *dso) +{ + switch (dso__binary_type(dso)) { + case DSO_BINARY_TYPE__KALLSYMS: + case DSO_BINARY_TYPE__GUEST_KALLSYMS: + case DSO_BINARY_TYPE__JAVA_JIT: + case DSO_BINARY_TYPE__BPF_PROG_INFO: + case DSO_BINARY_TYPE__BPF_IMAGE: + case DSO_BINARY_TYPE__OOL: + return false; + case DSO_BINARY_TYPE__VMLINUX: + case DSO_BINARY_TYPE__GUEST_VMLINUX: + case DSO_BINARY_TYPE__DEBUGLINK: + case DSO_BINARY_TYPE__BUILD_ID_CACHE: + case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: + case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: + case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: + case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO: + case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: + case DSO_BINARY_TYPE__GNU_DEBUGDATA: + case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: + case DSO_BINARY_TYPE__GUEST_KMODULE: + case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: + case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: + case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: + case DSO_BINARY_TYPE__KCORE: + case DSO_BINARY_TYPE__GUEST_KCORE: + case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: + case DSO_BINARY_TYPE__NOT_FOUND: + default: + return true; + } } int dso__read_binary_type_filename(const struct dso *dso, @@ -70,7 +125,7 @@ int dso__read_binary_type_filename(const struct dso *dso, char symfile[PATH_MAX]; unsigned int i; - len = __symbol__join_symfs(filename, size, dso->long_name); + len = __symbol__join_symfs(filename, size, dso__long_name(dso)); last_slash = filename + len; while (last_slash != filename && *last_slash != '/') last_slash--; @@ -112,12 +167,27 @@ int dso__read_binary_type_filename(const struct dso *dso, case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); - snprintf(filename + len, size - len, "%s.debug", dso->long_name); + snprintf(filename + len, size - len, "%s.debug", dso__long_name(dso)); break; case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); - snprintf(filename + len, size - len, "%s", dso->long_name); + snprintf(filename + len, size - len, "%s", dso__long_name(dso)); + break; + + case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO: + /* + * Ubuntu can mixup /usr/lib with /lib, putting debuginfo in + * /usr/lib/debug/lib when it is expected to be in + * /usr/lib/debug/usr/lib + */ + if (strlen(dso__long_name(dso)) < 9 || + strncmp(dso__long_name(dso), "/usr/lib/", 9)) { + ret = -1; + break; + } + len = __symbol__join_symfs(filename, size, "/usr/lib/debug"); + snprintf(filename + len, size - len, "%s", dso__long_name(dso) + 4); break; case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: @@ -125,31 +195,29 @@ int dso__read_binary_type_filename(const struct dso *dso, const char *last_slash; size_t dir_size; - last_slash = dso->long_name + dso->long_name_len; - while (last_slash != dso->long_name && *last_slash != '/') + last_slash = dso__long_name(dso) + dso__long_name_len(dso); + while (last_slash != dso__long_name(dso) && *last_slash != '/') last_slash--; len = __symbol__join_symfs(filename, size, ""); - dir_size = last_slash - dso->long_name + 2; + dir_size = last_slash - dso__long_name(dso) + 2; if (dir_size > (size - len)) { ret = -1; break; } - len += scnprintf(filename + len, dir_size, "%s", dso->long_name); + len += scnprintf(filename + len, dir_size, "%s", dso__long_name(dso)); len += scnprintf(filename + len , size - len, ".debug%s", last_slash); break; } case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: - if (!dso->has_build_id) { + if (!dso__has_build_id(dso)) { ret = -1; break; } - build_id__sprintf(dso->build_id, - sizeof(dso->build_id), - build_id_hex); + build_id__snprintf(dso__bid(dso), build_id_hex, sizeof(build_id_hex)); len = __symbol__join_symfs(filename, size, "/usr/lib/debug/.build-id/"); snprintf(filename + len, size - len, "%.2s/%s.debug", build_id_hex, build_id_hex + 2); @@ -158,29 +226,33 @@ int dso__read_binary_type_filename(const struct dso *dso, case DSO_BINARY_TYPE__VMLINUX: case DSO_BINARY_TYPE__GUEST_VMLINUX: case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: - __symbol__join_symfs(filename, size, dso->long_name); + case DSO_BINARY_TYPE__GNU_DEBUGDATA: + __symbol__join_symfs(filename, size, dso__long_name(dso)); break; case DSO_BINARY_TYPE__GUEST_KMODULE: case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: path__join3(filename, size, symbol_conf.symfs, - root_dir, dso->long_name); + root_dir, dso__long_name(dso)); break; case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: - __symbol__join_symfs(filename, size, dso->long_name); + __symbol__join_symfs(filename, size, dso__long_name(dso)); break; case DSO_BINARY_TYPE__KCORE: case DSO_BINARY_TYPE__GUEST_KCORE: - snprintf(filename, size, "%s", dso->long_name); + snprintf(filename, size, "%s", dso__long_name(dso)); break; default: case DSO_BINARY_TYPE__KALLSYMS: case DSO_BINARY_TYPE__GUEST_KALLSYMS: case DSO_BINARY_TYPE__JAVA_JIT: + case DSO_BINARY_TYPE__BPF_PROG_INFO: + case DSO_BINARY_TYPE__BPF_IMAGE: + case DSO_BINARY_TYPE__OOL: case DSO_BINARY_TYPE__NOT_FOUND: ret = -1; break; @@ -247,22 +319,16 @@ bool is_kernel_module(const char *pathname, int cpumode) bool dso__needs_decompress(struct dso *dso) { - return dso->symtab_type == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || - dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; + return dso__symtab_type(dso) == DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP || + dso__symtab_type(dso) == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; } -static int decompress_kmodule(struct dso *dso, const char *name, - char *pathname, size_t len) +int filename__decompress(const char *name, char *pathname, + size_t len, int comp, int *err) { char tmpbuf[] = KMOD_DECOMP_NAME; int fd = -1; - if (!dso__needs_decompress(dso)) - return -1; - - if (dso->comp == COMP_ID__NONE) - return -1; - /* * We have proper compression id for DSO and yet the file * behind the 'name' can still be plain uncompressed object. @@ -276,17 +342,17 @@ static int decompress_kmodule(struct dso *dso, const char *name, * To keep this transparent, we detect this and return the file * descriptor to the uncompressed file. */ - if (!compressions[dso->comp].is_compressed(name)) + if (!compressions[comp].is_compressed(name)) return open(name, O_RDONLY); fd = mkstemp(tmpbuf); if (fd < 0) { - dso->load_errno = errno; + *err = errno; return -1; } - if (compressions[dso->comp].decompress(name, fd)) { - dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE; + if (compressions[comp].decompress(name, fd)) { + *err = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE; close(fd); fd = -1; } @@ -300,6 +366,18 @@ static int decompress_kmodule(struct dso *dso, const char *name, return fd; } +static int decompress_kmodule(struct dso *dso, const char *name, + char *pathname, size_t len) +{ + if (!dso__needs_decompress(dso)) + return -1; + + if (dso__comp(dso) == COMP_ID__NONE) + return -1; + + return filename__decompress(name, pathname, len, dso__comp(dso), dso__load_errno(dso)); +} + int dso__decompress_kmodule_fd(struct dso *dso, const char *name) { return decompress_kmodule(dso, name, NULL, 0); @@ -388,7 +466,7 @@ int __kmod_path__parse(struct kmod_path *m, const char *path, return -ENOMEM; } - strxfrchar(m->name, '-', '_'); + strreplace(m->name, '-', '_'); } return 0; @@ -398,35 +476,60 @@ void dso__set_module_info(struct dso *dso, struct kmod_path *m, struct machine *machine) { if (machine__is_host(machine)) - dso->symtab_type = DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE; + dso__set_symtab_type(dso, DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE); else - dso->symtab_type = DSO_BINARY_TYPE__GUEST_KMODULE; + dso__set_symtab_type(dso, DSO_BINARY_TYPE__GUEST_KMODULE); /* _KMODULE_COMP should be next to _KMODULE */ if (m->kmod && m->comp) { - dso->symtab_type++; - dso->comp = m->comp; + dso__set_symtab_type(dso, dso__symtab_type(dso) + 1); + dso__set_comp(dso, m->comp); } + dso__set_is_kmod(dso); dso__set_short_name(dso, strdup(m->name), true); } /* * Global list of open DSOs and the counter. */ +struct mutex _dso__data_open_lock; static LIST_HEAD(dso__data_open); -static long dso__data_open_cnt; -static pthread_mutex_t dso__data_open_lock = PTHREAD_MUTEX_INITIALIZER; +static long dso__data_open_cnt GUARDED_BY(_dso__data_open_lock); + +static void dso__data_open_lock_init(void) +{ + mutex_init(&_dso__data_open_lock); +} + +static struct mutex *dso__data_open_lock(void) LOCK_RETURNED(_dso__data_open_lock) +{ + static pthread_once_t data_open_lock_once = PTHREAD_ONCE_INIT; + + pthread_once(&data_open_lock_once, dso__data_open_lock_init); -static void dso__list_add(struct dso *dso) + return &_dso__data_open_lock; +} + +static void dso__list_add(struct dso *dso) EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { - list_add_tail(&dso->data.open_entry, &dso__data_open); + list_add_tail(&dso__data(dso)->open_entry, &dso__data_open); +#ifdef REFCNT_CHECKING + dso__data(dso)->dso = dso__get(dso); +#endif + /* Assume the dso is part of dsos, hence the optional reference count above. */ + assert(dso__dsos(dso)); dso__data_open_cnt++; } -static void dso__list_del(struct dso *dso) +static void dso__list_del(struct dso *dso) EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { - list_del(&dso->data.open_entry); + list_del_init(&dso__data(dso)->open_entry); +#ifdef REFCNT_CHECKING + mutex_unlock(dso__data_open_lock()); + dso__put(dso__data(dso)->dso); + mutex_lock(dso__data_open_lock()); +#endif WARN_ONCE(dso__data_open_cnt <= 0, "DSO data fd counter out of bounds."); dso__data_open_cnt--; @@ -434,7 +537,7 @@ static void dso__list_del(struct dso *dso) static void close_first_dso(void); -static int do_open(char *name) +static int do_open(char *name) EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { int fd; char sbuf[STRERR_BUFSIZE]; @@ -455,7 +558,13 @@ static int do_open(char *name) return -1; } +char *dso__filename_with_chroot(const struct dso *dso, const char *filename) +{ + return filename_with_chroot(nsinfo__pid(dso__nsinfo_const(dso)), filename); +} + static int __open_dso(struct dso *dso, struct machine *machine) + EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { int fd = -EINVAL; char *root_dir = (char *)""; @@ -465,22 +574,34 @@ static int __open_dso(struct dso *dso, struct machine *machine) if (!name) return -ENOMEM; + mutex_lock(dso__lock(dso)); if (machine) root_dir = machine->root_dir; - if (dso__read_binary_type_filename(dso, dso->binary_type, + if (dso__read_binary_type_filename(dso, dso__binary_type(dso), root_dir, name, PATH_MAX)) goto out; - if (!is_regular_file(name)) - goto out; + if (!is_regular_file(name)) { + char *new_name; + + if (errno != ENOENT || dso__nsinfo(dso) == NULL) + goto out; + + new_name = dso__filename_with_chroot(dso, name); + if (!new_name) + goto out; + + free(name); + name = new_name; + } if (dso__needs_decompress(dso)) { char newpath[KMOD_DECOMP_LEN]; size_t len = sizeof(newpath); if (dso__decompress_kmodule_path(dso, name, newpath, len) < 0) { - fd = -dso->load_errno; + fd = -(*dso__load_errno(dso)); goto out; } @@ -494,6 +615,7 @@ static int __open_dso(struct dso *dso, struct machine *machine) unlink(name); out: + mutex_unlock(dso__lock(dso)); free(name); return fd; } @@ -508,14 +630,18 @@ static void check_data_close(void); * list/count of open DSO objects. */ static int open_dso(struct dso *dso, struct machine *machine) + EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { int fd; struct nscookie nsc; - if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE) - nsinfo__mountns_enter(dso->nsinfo, &nsc); + if (dso__binary_type(dso) != DSO_BINARY_TYPE__BUILD_ID_CACHE) { + mutex_lock(dso__lock(dso)); + nsinfo__mountns_enter(dso__nsinfo(dso), &nsc); + mutex_unlock(dso__lock(dso)); + } fd = __open_dso(dso, machine); - if (dso->binary_type != DSO_BINARY_TYPE__BUILD_ID_CACHE) + if (dso__binary_type(dso) != DSO_BINARY_TYPE__BUILD_ID_CACHE) nsinfo__mountns_exit(&nsc); if (fd >= 0) { @@ -530,12 +656,12 @@ static int open_dso(struct dso *dso, struct machine *machine) return fd; } -static void close_data_fd(struct dso *dso) +static void close_data_fd(struct dso *dso) EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { - if (dso->data.fd >= 0) { - close(dso->data.fd); - dso->data.fd = -1; - dso->data.file_size = 0; + if (dso__data(dso)->fd >= 0) { + close(dso__data(dso)->fd); + dso__data(dso)->fd = -1; + dso__data(dso)->file_size = 0; dso__list_del(dso); } } @@ -547,16 +673,22 @@ static void close_data_fd(struct dso *dso) * Close @dso's data file descriptor and updates * list/count of open DSO objects. */ -static void close_dso(struct dso *dso) +static void close_dso(struct dso *dso) EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { close_data_fd(dso); } -static void close_first_dso(void) +static void close_first_dso(void) EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { + struct dso_data *dso_data; struct dso *dso; - dso = list_first_entry(&dso__data_open, struct dso, data.open_entry); + dso_data = list_first_entry(&dso__data_open, struct dso_data, open_entry); +#ifdef REFCNT_CHECKING + dso = dso_data->dso; +#else + dso = container_of(dso_data, struct dso, data); +#endif close_dso(dso); } @@ -591,7 +723,7 @@ void reset_fd_limit(void) fd_limit = 0; } -static bool may_cache_fd(void) +static bool may_cache_fd(void) EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { if (!fd_limit) fd_limit = get_fd_limit(); @@ -607,7 +739,7 @@ static bool may_cache_fd(void) * for opened dso file descriptors. The limit is half * of the RLIMIT_NOFILE files opened. */ -static void check_data_close(void) +static void check_data_close(void) EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { bool cache_fd = may_cache_fd(); @@ -623,12 +755,13 @@ static void check_data_close(void) */ void dso__data_close(struct dso *dso) { - pthread_mutex_lock(&dso__data_open_lock); + mutex_lock(dso__data_open_lock()); close_dso(dso); - pthread_mutex_unlock(&dso__data_open_lock); + mutex_unlock(dso__data_open_lock()); } static void try_to_open_dso(struct dso *dso, struct machine *machine) + EXCLUSIVE_LOCKS_REQUIRED(_dso__data_open_lock) { enum dso_binary_type binary_type_data[] = { DSO_BINARY_TYPE__BUILD_ID_CACHE, @@ -636,28 +769,29 @@ static void try_to_open_dso(struct dso *dso, struct machine *machine) DSO_BINARY_TYPE__NOT_FOUND, }; int i = 0; + struct dso_data *dso_data = dso__data(dso); - if (dso->data.fd >= 0) + if (dso_data->fd >= 0) return; - if (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND) { - dso->data.fd = open_dso(dso, machine); + if (dso__binary_type(dso) != DSO_BINARY_TYPE__NOT_FOUND) { + dso_data->fd = open_dso(dso, machine); goto out; } do { - dso->binary_type = binary_type_data[i++]; + dso__set_binary_type(dso, binary_type_data[i++]); - dso->data.fd = open_dso(dso, machine); - if (dso->data.fd >= 0) + dso_data->fd = open_dso(dso, machine); + if (dso_data->fd >= 0) goto out; - } while (dso->binary_type != DSO_BINARY_TYPE__NOT_FOUND); + } while (dso__binary_type(dso) != DSO_BINARY_TYPE__NOT_FOUND); out: - if (dso->data.fd >= 0) - dso->data.status = DSO_DATA_STATUS_OK; + if (dso_data->fd >= 0) + dso_data->status = DSO_DATA_STATUS_OK; else - dso->data.status = DSO_DATA_STATUS_ERROR; + dso_data->status = DSO_DATA_STATUS_ERROR; } /** @@ -669,46 +803,90 @@ out: * returns file descriptor. It should be paired with * dso__data_put_fd() if it returns non-negative value. */ -int dso__data_get_fd(struct dso *dso, struct machine *machine) +bool dso__data_get_fd(struct dso *dso, struct machine *machine, int *fd) { - if (dso->data.status == DSO_DATA_STATUS_ERROR) - return -1; + *fd = -1; + if (dso__data(dso)->status == DSO_DATA_STATUS_ERROR) + return false; - if (pthread_mutex_lock(&dso__data_open_lock) < 0) - return -1; + mutex_lock(dso__data_open_lock()); try_to_open_dso(dso, machine); - if (dso->data.fd < 0) - pthread_mutex_unlock(&dso__data_open_lock); + *fd = dso__data(dso)->fd; + if (*fd >= 0) + return true; - return dso->data.fd; + mutex_unlock(dso__data_open_lock()); + return false; } void dso__data_put_fd(struct dso *dso __maybe_unused) { - pthread_mutex_unlock(&dso__data_open_lock); + mutex_unlock(dso__data_open_lock()); } bool dso__data_status_seen(struct dso *dso, enum dso_data_status_seen by) { u32 flag = 1 << by; - if (dso->data.status_seen & flag) + if (dso__data(dso)->status_seen & flag) return true; - dso->data.status_seen |= flag; + dso__data(dso)->status_seen |= flag; return false; } +#ifdef HAVE_LIBBPF_SUPPORT +static ssize_t bpf_read(struct dso *dso, u64 offset, char *data) +{ + struct bpf_prog_info_node *node; + ssize_t size = DSO__DATA_CACHE_SIZE; + struct dso_bpf_prog *dso_bpf_prog = dso__bpf_prog(dso); + u64 len; + u8 *buf; + + node = perf_env__find_bpf_prog_info(dso_bpf_prog->env, dso_bpf_prog->id); + if (!node || !node->info_linear) { + dso__data(dso)->status = DSO_DATA_STATUS_ERROR; + return -1; + } + + len = node->info_linear->info.jited_prog_len; + buf = (u8 *)(uintptr_t)node->info_linear->info.jited_prog_insns; + + if (offset >= len) + return -1; + + size = (ssize_t)min(len - offset, (u64)size); + memcpy(data, buf + offset, size); + return size; +} + +static int bpf_size(struct dso *dso) +{ + struct bpf_prog_info_node *node; + struct dso_bpf_prog *dso_bpf_prog = dso__bpf_prog(dso); + + node = perf_env__find_bpf_prog_info(dso_bpf_prog->env, dso_bpf_prog->id); + if (!node || !node->info_linear) { + dso__data(dso)->status = DSO_DATA_STATUS_ERROR; + return -1; + } + + dso__data(dso)->file_size = node->info_linear->info.jited_prog_len; + return 0; +} +#endif // HAVE_LIBBPF_SUPPORT + static void dso_cache__free(struct dso *dso) { - struct rb_root *root = &dso->data.cache; + struct rb_root *root = &dso__data(dso)->cache; struct rb_node *next = rb_first(root); - pthread_mutex_lock(&dso->lock); + mutex_lock(dso__lock(dso)); while (next) { struct dso_cache *cache; @@ -717,12 +895,12 @@ dso_cache__free(struct dso *dso) rb_erase(&cache->rb_node, root); free(cache); } - pthread_mutex_unlock(&dso->lock); + mutex_unlock(dso__lock(dso)); } -static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset) +static struct dso_cache *__dso_cache__find(struct dso *dso, u64 offset) { - const struct rb_root *root = &dso->data.cache; + const struct rb_root *root = &dso__data(dso)->cache; struct rb_node * const *p = &root->rb_node; const struct rb_node *parent = NULL; struct dso_cache *cache; @@ -748,13 +926,13 @@ static struct dso_cache *dso_cache__find(struct dso *dso, u64 offset) static struct dso_cache * dso_cache__insert(struct dso *dso, struct dso_cache *new) { - struct rb_root *root = &dso->data.cache; + struct rb_root *root = &dso__data(dso)->cache; struct rb_node **p = &root->rb_node; struct rb_node *parent = NULL; struct dso_cache *cache; u64 offset = new->offset; - pthread_mutex_lock(&dso->lock); + mutex_lock(dso__lock(dso)); while (*p != NULL) { u64 end; @@ -775,98 +953,119 @@ dso_cache__insert(struct dso *dso, struct dso_cache *new) cache = NULL; out: - pthread_mutex_unlock(&dso->lock); + mutex_unlock(dso__lock(dso)); return cache; } -static ssize_t -dso_cache__memcpy(struct dso_cache *cache, u64 offset, - u8 *data, u64 size) +static ssize_t dso_cache__memcpy(struct dso_cache *cache, u64 offset, u8 *data, + u64 size, bool out) { u64 cache_offset = offset - cache->offset; u64 cache_size = min(cache->size - cache_offset, size); - memcpy(data, cache->data + cache_offset, cache_size); + if (out) + memcpy(data, cache->data + cache_offset, cache_size); + else + memcpy(cache->data + cache_offset, data, cache_size); return cache_size; } -static ssize_t -dso_cache__read(struct dso *dso, struct machine *machine, - u64 offset, u8 *data, ssize_t size) +static ssize_t file_read(struct dso *dso, struct machine *machine, + u64 offset, char *data) { - struct dso_cache *cache; - struct dso_cache *old; ssize_t ret; - do { - u64 cache_offset; - - cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); - if (!cache) - return -ENOMEM; - - pthread_mutex_lock(&dso__data_open_lock); + mutex_lock(dso__data_open_lock()); - /* - * dso->data.fd might be closed if other thread opened another - * file (dso) due to open file limit (RLIMIT_NOFILE). - */ - try_to_open_dso(dso, machine); + /* + * dso__data(dso)->fd might be closed if other thread opened another + * file (dso) due to open file limit (RLIMIT_NOFILE). + */ + try_to_open_dso(dso, machine); - if (dso->data.fd < 0) { - ret = -errno; - dso->data.status = DSO_DATA_STATUS_ERROR; - break; - } + if (dso__data(dso)->fd < 0) { + dso__data(dso)->status = DSO_DATA_STATUS_ERROR; + ret = -errno; + goto out; + } - cache_offset = offset & DSO__DATA_CACHE_MASK; + ret = pread(dso__data(dso)->fd, data, DSO__DATA_CACHE_SIZE, offset); +out: + mutex_unlock(dso__data_open_lock()); + return ret; +} - ret = pread(dso->data.fd, cache->data, DSO__DATA_CACHE_SIZE, cache_offset); - if (ret <= 0) - break; +static struct dso_cache *dso_cache__populate(struct dso *dso, + struct machine *machine, + u64 offset, ssize_t *ret) +{ + u64 cache_offset = offset & DSO__DATA_CACHE_MASK; + struct dso_cache *cache; + struct dso_cache *old; - cache->offset = cache_offset; - cache->size = ret; - } while (0); + cache = zalloc(sizeof(*cache) + DSO__DATA_CACHE_SIZE); + if (!cache) { + *ret = -ENOMEM; + return NULL; + } +#ifdef HAVE_LIBBPF_SUPPORT + if (dso__binary_type(dso) == DSO_BINARY_TYPE__BPF_PROG_INFO) + *ret = bpf_read(dso, cache_offset, cache->data); + else +#endif + if (dso__binary_type(dso) == DSO_BINARY_TYPE__OOL) + *ret = DSO__DATA_CACHE_SIZE; + else + *ret = file_read(dso, machine, cache_offset, cache->data); - pthread_mutex_unlock(&dso__data_open_lock); + if (*ret <= 0) { + free(cache); + return NULL; + } - if (ret > 0) { - old = dso_cache__insert(dso, cache); - if (old) { - /* we lose the race */ - free(cache); - cache = old; - } + cache->offset = cache_offset; + cache->size = *ret; - ret = dso_cache__memcpy(cache, offset, data, size); + old = dso_cache__insert(dso, cache); + if (old) { + /* we lose the race */ + free(cache); + cache = old; } - if (ret <= 0) - free(cache); + return cache; +} - return ret; +static struct dso_cache *dso_cache__find(struct dso *dso, + struct machine *machine, + u64 offset, + ssize_t *ret) +{ + struct dso_cache *cache = __dso_cache__find(dso, offset); + + return cache ? cache : dso_cache__populate(dso, machine, offset, ret); } -static ssize_t dso_cache_read(struct dso *dso, struct machine *machine, - u64 offset, u8 *data, ssize_t size) +static ssize_t dso_cache_io(struct dso *dso, struct machine *machine, + u64 offset, u8 *data, ssize_t size, bool out) { struct dso_cache *cache; + ssize_t ret = 0; - cache = dso_cache__find(dso, offset); - if (cache) - return dso_cache__memcpy(cache, offset, data, size); - else - return dso_cache__read(dso, machine, offset, data, size); + cache = dso_cache__find(dso, machine, offset, &ret); + if (!cache) + return ret; + + return dso_cache__memcpy(cache, offset, data, size, out); } /* * Reads and caches dso data DSO__DATA_CACHE_SIZE size chunks * in the rb_tree. Any read to already cached data is served - * by cached data. + * by cached data. Writes update the cache only, not the backing file. */ -static ssize_t cached_read(struct dso *dso, struct machine *machine, - u64 offset, u8 *data, ssize_t size) +static ssize_t cached_io(struct dso *dso, struct machine *machine, + u64 offset, u8 *data, ssize_t size, bool out) { ssize_t r = 0; u8 *p = data; @@ -874,7 +1073,7 @@ static ssize_t cached_read(struct dso *dso, struct machine *machine, do { ssize_t ret; - ret = dso_cache_read(dso, machine, offset, p, size); + ret = dso_cache_io(dso, machine, offset, p, size, out); if (ret < 0) return ret; @@ -894,46 +1093,54 @@ static ssize_t cached_read(struct dso *dso, struct machine *machine, return r; } -int dso__data_file_size(struct dso *dso, struct machine *machine) +static int file_size(struct dso *dso, struct machine *machine) { int ret = 0; struct stat st; char sbuf[STRERR_BUFSIZE]; - if (dso->data.file_size) - return 0; - - if (dso->data.status == DSO_DATA_STATUS_ERROR) - return -1; - - pthread_mutex_lock(&dso__data_open_lock); + mutex_lock(dso__data_open_lock()); /* - * dso->data.fd might be closed if other thread opened another + * dso__data(dso)->fd might be closed if other thread opened another * file (dso) due to open file limit (RLIMIT_NOFILE). */ try_to_open_dso(dso, machine); - if (dso->data.fd < 0) { + if (dso__data(dso)->fd < 0) { ret = -errno; - dso->data.status = DSO_DATA_STATUS_ERROR; + dso__data(dso)->status = DSO_DATA_STATUS_ERROR; goto out; } - if (fstat(dso->data.fd, &st) < 0) { + if (fstat(dso__data(dso)->fd, &st) < 0) { ret = -errno; pr_err("dso cache fstat failed: %s\n", str_error_r(errno, sbuf, sizeof(sbuf))); - dso->data.status = DSO_DATA_STATUS_ERROR; + dso__data(dso)->status = DSO_DATA_STATUS_ERROR; goto out; } - dso->data.file_size = st.st_size; + dso__data(dso)->file_size = st.st_size; out: - pthread_mutex_unlock(&dso__data_open_lock); + mutex_unlock(dso__data_open_lock()); return ret; } +int dso__data_file_size(struct dso *dso, struct machine *machine) +{ + if (dso__data(dso)->file_size) + return 0; + + if (dso__data(dso)->status == DSO_DATA_STATUS_ERROR) + return -1; +#ifdef HAVE_LIBBPF_SUPPORT + if (dso__binary_type(dso) == DSO_BINARY_TYPE__BPF_PROG_INFO) + return bpf_size(dso); +#endif + return file_size(dso, machine); +} + /** * dso__data_size - Return dso data size * @dso: dso object @@ -947,23 +1154,24 @@ off_t dso__data_size(struct dso *dso, struct machine *machine) return -1; /* For now just estimate dso data size is close to file size */ - return dso->data.file_size; + return dso__data(dso)->file_size; } -static ssize_t data_read_offset(struct dso *dso, struct machine *machine, - u64 offset, u8 *data, ssize_t size) +static ssize_t data_read_write_offset(struct dso *dso, struct machine *machine, + u64 offset, u8 *data, ssize_t size, + bool out) { if (dso__data_file_size(dso, machine)) return -1; /* Check the offset sanity. */ - if (offset > dso->data.file_size) + if (offset > dso__data(dso)->file_size) return -1; if (offset + size < offset) return -1; - return cached_read(dso, machine, offset, data, size); + return cached_io(dso, machine, offset, data, size, out); } /** @@ -980,10 +1188,72 @@ static ssize_t data_read_offset(struct dso *dso, struct machine *machine, ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine, u64 offset, u8 *data, ssize_t size) { - if (dso->data.status == DSO_DATA_STATUS_ERROR) + if (dso__data(dso)->status == DSO_DATA_STATUS_ERROR) return -1; - return data_read_offset(dso, machine, offset, data, size); + return data_read_write_offset(dso, machine, offset, data, size, true); +} + +uint16_t dso__e_machine(struct dso *dso, struct machine *machine) +{ + uint16_t e_machine = EM_NONE; + int fd; + + switch (dso__binary_type(dso)) { + case DSO_BINARY_TYPE__KALLSYMS: + case DSO_BINARY_TYPE__GUEST_KALLSYMS: + case DSO_BINARY_TYPE__VMLINUX: + case DSO_BINARY_TYPE__GUEST_VMLINUX: + case DSO_BINARY_TYPE__GUEST_KMODULE: + case DSO_BINARY_TYPE__GUEST_KMODULE_COMP: + case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE: + case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP: + case DSO_BINARY_TYPE__KCORE: + case DSO_BINARY_TYPE__GUEST_KCORE: + case DSO_BINARY_TYPE__BPF_PROG_INFO: + case DSO_BINARY_TYPE__BPF_IMAGE: + case DSO_BINARY_TYPE__OOL: + case DSO_BINARY_TYPE__JAVA_JIT: + return EM_HOST; + case DSO_BINARY_TYPE__DEBUGLINK: + case DSO_BINARY_TYPE__BUILD_ID_CACHE: + case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO: + case DSO_BINARY_TYPE__GNU_DEBUGDATA: + case DSO_BINARY_TYPE__SYSTEM_PATH_DSO: + case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO: + case DSO_BINARY_TYPE__FEDORA_DEBUGINFO: + case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO: + case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO: + case DSO_BINARY_TYPE__BUILDID_DEBUGINFO: + break; + case DSO_BINARY_TYPE__NOT_FOUND: + default: + return EM_NONE; + } + + mutex_lock(dso__data_open_lock()); + + /* + * dso__data(dso)->fd might be closed if other thread opened another + * file (dso) due to open file limit (RLIMIT_NOFILE). + */ + try_to_open_dso(dso, machine); + fd = dso__data(dso)->fd; + if (fd >= 0) { + _Static_assert(offsetof(Elf32_Ehdr, e_machine) == 18, "Unexpected offset"); + _Static_assert(offsetof(Elf64_Ehdr, e_machine) == 18, "Unexpected offset"); + if (dso__needs_swap(dso) == DSO_SWAP__UNSET) { + unsigned char eidata; + + if (pread(fd, &eidata, sizeof(eidata), EI_DATA) == sizeof(eidata)) + dso__swap_init(dso, eidata); + } + if (dso__needs_swap(dso) != DSO_SWAP__UNSET && + pread(fd, &e_machine, sizeof(e_machine), 18) == sizeof(e_machine)) + e_machine = DSO__SWAP(dso, uint16_t, e_machine); + } + mutex_unlock(dso__data_open_lock()); + return e_machine; } /** @@ -1000,17 +1270,61 @@ ssize_t dso__data_read_addr(struct dso *dso, struct map *map, struct machine *machine, u64 addr, u8 *data, ssize_t size) { - u64 offset = map->map_ip(map, addr); + u64 offset = map__map_ip(map, addr); + return dso__data_read_offset(dso, machine, offset, data, size); } +/** + * dso__data_write_cache_offs - Write data to dso data cache at file offset + * @dso: dso object + * @machine: machine object + * @offset: file offset + * @data: buffer to write + * @size: size of the @data buffer + * + * Write into the dso file data cache, but do not change the file itself. + */ +ssize_t dso__data_write_cache_offs(struct dso *dso, struct machine *machine, + u64 offset, const u8 *data_in, ssize_t size) +{ + u8 *data = (u8 *)data_in; /* cast away const to use same fns for r/w */ + + if (dso__data(dso)->status == DSO_DATA_STATUS_ERROR) + return -1; + + return data_read_write_offset(dso, machine, offset, data, size, false); +} + +/** + * dso__data_write_cache_addr - Write data to dso data cache at dso address + * @dso: dso object + * @machine: machine object + * @add: virtual memory address + * @data: buffer to write + * @size: size of the @data buffer + * + * External interface to write into the dso file data cache, but do not change + * the file itself. + */ +ssize_t dso__data_write_cache_addr(struct dso *dso, struct map *map, + struct machine *machine, u64 addr, + const u8 *data, ssize_t size) +{ + u64 offset = map__map_ip(map, addr); + + return dso__data_write_cache_offs(dso, machine, offset, data, size); +} + struct map *dso__new_map(const char *name) { struct map *map = NULL; struct dso *dso = dso__new(name); - if (dso) + if (dso) { map = map__new2(0, dso); + dso__put(dso); + } return map; } @@ -1029,137 +1343,158 @@ struct dso *machine__findnew_kernel(struct machine *machine, const char *name, */ if (dso != NULL) { dso__set_short_name(dso, short_name, false); - dso->kernel = dso_type; + dso__set_kernel(dso, dso_type); } return dso; } -/* - * Find a matching entry and/or link current entry to RB tree. - * Either one of the dso or name parameter must be non-NULL or the - * function will not work. - */ -static struct dso *__dso__findlink_by_longname(struct rb_root *root, - struct dso *dso, const char *name) +static void __dso__set_long_name_id(struct dso *dso, const char *name, bool name_allocated) { - struct rb_node **p = &root->rb_node; - struct rb_node *parent = NULL; - - if (!name) - name = dso->long_name; - /* - * Find node with the matching name - */ - while (*p) { - struct dso *this = rb_entry(*p, struct dso, rb_node); - int rc = strcmp(name, this->long_name); + if (dso__long_name_allocated(dso)) + free((char *)dso__long_name(dso)); - parent = *p; - if (rc == 0) { - /* - * In case the new DSO is a duplicate of an existing - * one, print a one-time warning & put the new entry - * at the end of the list of duplicates. - */ - if (!dso || (dso == this)) - return this; /* Find matching dso */ - /* - * The core kernel DSOs may have duplicated long name. - * In this case, the short name should be different. - * Comparing the short names to differentiate the DSOs. - */ - rc = strcmp(dso->short_name, this->short_name); - if (rc == 0) { - pr_err("Duplicated dso name: %s\n", name); - return NULL; - } - } - if (rc < 0) - p = &parent->rb_left; - else - p = &parent->rb_right; - } - if (dso) { - /* Add new node and rebalance tree */ - rb_link_node(&dso->rb_node, parent, p); - rb_insert_color(&dso->rb_node, root); - dso->root = root; - } - return NULL; -} - -static inline struct dso *__dso__find_by_longname(struct rb_root *root, - const char *name) -{ - return __dso__findlink_by_longname(root, NULL, name); + RC_CHK_ACCESS(dso)->long_name = name; + RC_CHK_ACCESS(dso)->long_name_len = strlen(name); + dso__set_long_name_allocated(dso, name_allocated); } -void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) +static void dso__set_long_name_id(struct dso *dso, const char *name, bool name_allocated) { - struct rb_root *root = dso->root; + struct dsos *dsos = dso__dsos(dso); if (name == NULL) return; - if (dso->long_name_allocated) - free((char *)dso->long_name); - - if (root) { - rb_erase(&dso->rb_node, root); + if (dsos) { /* - * __dso__findlink_by_longname() isn't guaranteed to add it - * back, so a clean removal is required here. + * Need to avoid re-sorting the dsos breaking by non-atomically + * renaming the dso. */ - RB_CLEAR_NODE(&dso->rb_node); - dso->root = NULL; + down_write(&dsos->lock); + __dso__set_long_name_id(dso, name, name_allocated); + dsos->sorted = false; + up_write(&dsos->lock); + } else { + __dso__set_long_name_id(dso, name, name_allocated); } +} + +static int __dso_id__cmp(const struct dso_id *a, const struct dso_id *b) +{ + if (a->mmap2_valid && b->mmap2_valid) { + if (a->maj > b->maj) return -1; + if (a->maj < b->maj) return 1; - dso->long_name = name; - dso->long_name_len = strlen(name); - dso->long_name_allocated = name_allocated; + if (a->min > b->min) return -1; + if (a->min < b->min) return 1; - if (root) - __dso__findlink_by_longname(root, dso, NULL); + if (a->ino > b->ino) return -1; + if (a->ino < b->ino) return 1; + } + if (a->mmap2_ino_generation_valid && b->mmap2_ino_generation_valid) { + if (a->ino_generation > b->ino_generation) return -1; + if (a->ino_generation < b->ino_generation) return 1; + } + if (build_id__is_defined(&a->build_id) && build_id__is_defined(&b->build_id)) { + if (a->build_id.size != b->build_id.size) + return a->build_id.size < b->build_id.size ? -1 : 1; + return memcmp(a->build_id.data, b->build_id.data, a->build_id.size); + } + return 0; } -void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) +const struct dso_id dso_id_empty = { + { + .maj = 0, + .min = 0, + .ino = 0, + .ino_generation = 0, + }, + .mmap2_valid = false, + .mmap2_ino_generation_valid = false, + { + .size = 0, + } +}; + +void __dso__improve_id(struct dso *dso, const struct dso_id *id) { - if (name == NULL) - return; + struct dsos *dsos = dso__dsos(dso); + struct dso_id *dso_id = dso__id(dso); + bool changed = false; - if (dso->short_name_allocated) - free((char *)dso->short_name); + /* dsos write lock held by caller. */ + + if (id->mmap2_valid && !dso_id->mmap2_valid) { + dso_id->maj = id->maj; + dso_id->min = id->min; + dso_id->ino = id->ino; + dso_id->mmap2_valid = true; + changed = true; + } + if (id->mmap2_ino_generation_valid && !dso_id->mmap2_ino_generation_valid) { + dso_id->ino_generation = id->ino_generation; + dso_id->mmap2_ino_generation_valid = true; + changed = true; + } + if (build_id__is_defined(&id->build_id) && !build_id__is_defined(&dso_id->build_id)) { + dso_id->build_id = id->build_id; + changed = true; + } + if (changed && dsos) + dsos->sorted = false; +} + +int dso_id__cmp(const struct dso_id *a, const struct dso_id *b) +{ + if (a == &dso_id_empty || b == &dso_id_empty) { + /* There is no valid data to compare so the comparison always returns identical. */ + return 0; + } + + return __dso_id__cmp(a, b); +} - dso->short_name = name; - dso->short_name_len = strlen(name); - dso->short_name_allocated = name_allocated; +int dso__cmp_id(struct dso *a, struct dso *b) +{ + return __dso_id__cmp(dso__id(a), dso__id(b)); } -static void dso__set_basename(struct dso *dso) +void dso__set_long_name(struct dso *dso, const char *name, bool name_allocated) { - /* - * basename() may modify path buffer, so we must pass - * a copy. - */ - char *base, *lname = strdup(dso->long_name); + dso__set_long_name_id(dso, name, name_allocated); +} - if (!lname) - return; +static void __dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) +{ + if (dso__short_name_allocated(dso)) + free((char *)dso__short_name(dso)); - /* - * basename() may return a pointer to internal - * storage which is reused in subsequent calls - * so copy the result. - */ - base = strdup(basename(lname)); + RC_CHK_ACCESS(dso)->short_name = name; + RC_CHK_ACCESS(dso)->short_name_len = strlen(name); + dso__set_short_name_allocated(dso, name_allocated); +} - free(lname); +void dso__set_short_name(struct dso *dso, const char *name, bool name_allocated) +{ + struct dsos *dsos = dso__dsos(dso); - if (!base) - return; + if (name == NULL) + return; - dso__set_short_name(dso, base, true); + if (dsos) { + /* + * Need to avoid re-sorting the dsos breaking by non-atomically + * renaming the dso. + */ + down_write(&dsos->lock); + __dso__set_short_name(dso, name, name_allocated); + dsos->sorted = false; + up_write(&dsos->lock); + } else { + __dso__set_short_name(dso, name, name_allocated); + } } int dso__name_len(const struct dso *dso) @@ -1167,38 +1502,48 @@ int dso__name_len(const struct dso *dso) if (!dso) return strlen("[unknown]"); if (verbose > 0) - return dso->long_name_len; + return dso__long_name_len(dso); - return dso->short_name_len; + return dso__short_name_len(dso); } bool dso__loaded(const struct dso *dso) { - return dso->loaded; + return RC_CHK_ACCESS(dso)->loaded; } bool dso__sorted_by_name(const struct dso *dso) { - return dso->sorted_by_name; + return RC_CHK_ACCESS(dso)->sorted_by_name; } void dso__set_sorted_by_name(struct dso *dso) { - dso->sorted_by_name = true; + RC_CHK_ACCESS(dso)->sorted_by_name = true; } -struct dso *dso__new(const char *name) +struct dso *dso__new_id(const char *name, const struct dso_id *id) { - struct dso *dso = calloc(1, sizeof(*dso) + strlen(name) + 1); + RC_STRUCT(dso) *dso = zalloc(sizeof(*dso) + strlen(name) + 1); + struct dso *res; + struct dso_data *data; - if (dso != NULL) { + if (!dso) + return NULL; + + if (ADD_RC_CHK(res, dso)) { strcpy(dso->name, name); - dso__set_long_name(dso, dso->name, false); - dso__set_short_name(dso, dso->name, false); - dso->symbols = dso->symbol_names = RB_ROOT; - dso->data.cache = RB_ROOT; - dso->inlined_nodes = RB_ROOT; - dso->srclines = RB_ROOT; + if (id) + dso->id = *id; + dso__set_long_name_id(res, dso->name, false); + dso__set_short_name(res, dso->name, false); + dso->symbols = RB_ROOT_CACHED; + dso->symbol_names = NULL; + dso->symbol_names_len = 0; + dso->inlined_nodes = RB_ROOT_CACHED; + dso->srclines = RB_ROOT_CACHED; + dso->data_types = RB_ROOT; + dso->global_vars = RB_ROOT; dso->data.fd = -1; dso->data.status = DSO_DATA_STATUS_UNKNOWN; dso->symtab_type = DSO_BINARY_TYPE__NOT_FOUND; @@ -1207,267 +1552,188 @@ struct dso *dso__new(const char *name) dso->loaded = 0; dso->rel = 0; dso->sorted_by_name = 0; - dso->has_build_id = 0; dso->has_srcline = 1; dso->a2l_fails = 1; - dso->kernel = DSO_TYPE_USER; + dso->kernel = DSO_SPACE__USER; + dso->is_kmod = 0; dso->needs_swap = DSO_SWAP__UNSET; dso->comp = COMP_ID__NONE; - RB_CLEAR_NODE(&dso->rb_node); - dso->root = NULL; - INIT_LIST_HEAD(&dso->node); - INIT_LIST_HEAD(&dso->data.open_entry); - pthread_mutex_init(&dso->lock, NULL); + mutex_init(&dso->lock); refcount_set(&dso->refcnt, 1); + data = &dso->data; + data->cache = RB_ROOT; + data->fd = -1; + data->status = DSO_DATA_STATUS_UNKNOWN; + INIT_LIST_HEAD(&data->open_entry); +#ifdef REFCNT_CHECKING + data->dso = NULL; /* Set when on the open_entry list. */ +#endif } + return res; +} - return dso; +struct dso *dso__new(const char *name) +{ + return dso__new_id(name, NULL); } void dso__delete(struct dso *dso) { - if (!RB_EMPTY_NODE(&dso->rb_node)) - pr_err("DSO %s is still in rbtree when being deleted!\n", - dso->long_name); + if (dso__dsos(dso)) + pr_err("DSO %s is still in rbtree when being deleted!\n", dso__long_name(dso)); /* free inlines first, as they reference symbols */ - inlines__tree_delete(&dso->inlined_nodes); - srcline__tree_delete(&dso->srclines); - symbols__delete(&dso->symbols); - - if (dso->short_name_allocated) { - zfree((char **)&dso->short_name); - dso->short_name_allocated = false; + inlines__tree_delete(&RC_CHK_ACCESS(dso)->inlined_nodes); + srcline__tree_delete(&RC_CHK_ACCESS(dso)->srclines); + symbols__delete(&RC_CHK_ACCESS(dso)->symbols); + RC_CHK_ACCESS(dso)->symbol_names_len = 0; + zfree(&RC_CHK_ACCESS(dso)->symbol_names); + annotated_data_type__tree_delete(dso__data_types(dso)); + global_var_type__tree_delete(dso__global_vars(dso)); + + if (RC_CHK_ACCESS(dso)->short_name_allocated) { + zfree((char **)&RC_CHK_ACCESS(dso)->short_name); + RC_CHK_ACCESS(dso)->short_name_allocated = false; } - if (dso->long_name_allocated) { - zfree((char **)&dso->long_name); - dso->long_name_allocated = false; + if (RC_CHK_ACCESS(dso)->long_name_allocated) { + zfree((char **)&RC_CHK_ACCESS(dso)->long_name); + RC_CHK_ACCESS(dso)->long_name_allocated = false; } dso__data_close(dso); - auxtrace_cache__free(dso->auxtrace_cache); + auxtrace_cache__free(RC_CHK_ACCESS(dso)->auxtrace_cache); dso_cache__free(dso); dso__free_a2l(dso); - zfree(&dso->symsrc_filename); - nsinfo__zput(dso->nsinfo); - pthread_mutex_destroy(&dso->lock); - free(dso); + dso__free_symsrc_filename(dso); + nsinfo__zput(RC_CHK_ACCESS(dso)->nsinfo); + mutex_destroy(dso__lock(dso)); + RC_CHK_FREE(dso); } struct dso *dso__get(struct dso *dso) { - if (dso) - refcount_inc(&dso->refcnt); - return dso; + struct dso *result; + + if (RC_CHK_GET(result, dso)) + refcount_inc(&RC_CHK_ACCESS(dso)->refcnt); + + return result; } void dso__put(struct dso *dso) { - if (dso && refcount_dec_and_test(&dso->refcnt)) +#ifdef REFCNT_CHECKING + if (dso && dso__data(dso) && refcount_read(&RC_CHK_ACCESS(dso)->refcnt) == 2) + dso__data_close(dso); +#endif + if (dso && refcount_dec_and_test(&RC_CHK_ACCESS(dso)->refcnt)) dso__delete(dso); + else + RC_CHK_PUT(dso); } -void dso__set_build_id(struct dso *dso, void *build_id) +int dso__swap_init(struct dso *dso, unsigned char eidata) { - memcpy(dso->build_id, build_id, sizeof(dso->build_id)); - dso->has_build_id = 1; + static unsigned int const endian = 1; + + dso__set_needs_swap(dso, DSO_SWAP__NO); + + switch (eidata) { + case ELFDATA2LSB: + /* We are big endian, DSO is little endian. */ + if (*(unsigned char const *)&endian != 1) + dso__set_needs_swap(dso, DSO_SWAP__YES); + break; + + case ELFDATA2MSB: + /* We are little endian, DSO is big endian. */ + if (*(unsigned char const *)&endian != 0) + dso__set_needs_swap(dso, DSO_SWAP__YES); + break; + + default: + pr_err("unrecognized DSO data encoding %d\n", eidata); + return -EINVAL; + } + + return 0; } -bool dso__build_id_equal(const struct dso *dso, u8 *build_id) +void dso__set_build_id(struct dso *dso, const struct build_id *bid) { - return memcmp(dso->build_id, build_id, sizeof(dso->build_id)) == 0; + dso__id(dso)->build_id = *bid; +} + +bool dso__build_id_equal(const struct dso *dso, const struct build_id *bid) +{ + const struct build_id *dso_bid = dso__bid(dso); + + if (dso_bid->size > bid->size && dso_bid->size == BUILD_ID_SIZE) { + /* + * For the backward compatibility, it allows a build-id has + * trailing zeros. + */ + return !memcmp(dso_bid->data, bid->data, bid->size) && + !memchr_inv(&dso_bid->data[bid->size], 0, + dso_bid->size - bid->size); + } + + return dso_bid->size == bid->size && + memcmp(dso_bid->data, bid->data, dso_bid->size) == 0; } void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine) { char path[PATH_MAX]; + struct build_id bid = { .size = 0, }; if (machine__is_default_guest(machine)) return; sprintf(path, "%s/sys/kernel/notes", machine->root_dir); - if (sysfs__read_build_id(path, dso->build_id, - sizeof(dso->build_id)) == 0) - dso->has_build_id = true; + sysfs__read_build_id(path, &bid); + dso__set_build_id(dso, &bid); } int dso__kernel_module_get_build_id(struct dso *dso, const char *root_dir) { char filename[PATH_MAX]; + struct build_id bid = { .size = 0, }; /* * kernel module short names are of the form "[module]" and * we need just "module" here. */ - const char *name = dso->short_name + 1; + const char *name = dso__short_name(dso) + 1; snprintf(filename, sizeof(filename), "%s/sys/module/%.*s/notes/.note.gnu.build-id", root_dir, (int)strlen(name) - 1, name); - if (sysfs__read_build_id(filename, dso->build_id, - sizeof(dso->build_id)) == 0) - dso->has_build_id = true; - + sysfs__read_build_id(filename, &bid); + dso__set_build_id(dso, &bid); return 0; } -bool __dsos__read_build_ids(struct list_head *head, bool with_hits) -{ - bool have_build_id = false; - struct dso *pos; - struct nscookie nsc; - - list_for_each_entry(pos, head, node) { - if (with_hits && !pos->hit && !dso__is_vdso(pos)) - continue; - if (pos->has_build_id) { - have_build_id = true; - continue; - } - nsinfo__mountns_enter(pos->nsinfo, &nsc); - if (filename__read_build_id(pos->long_name, pos->build_id, - sizeof(pos->build_id)) > 0) { - have_build_id = true; - pos->has_build_id = true; - } - nsinfo__mountns_exit(&nsc); - } - - return have_build_id; -} - -void __dsos__add(struct dsos *dsos, struct dso *dso) -{ - list_add_tail(&dso->node, &dsos->head); - __dso__findlink_by_longname(&dsos->root, dso, NULL); - /* - * It is now in the linked list, grab a reference, then garbage collect - * this when needing memory, by looking at LRU dso instances in the - * list with atomic_read(&dso->refcnt) == 1, i.e. no references - * anywhere besides the one for the list, do, under a lock for the - * list: remove it from the list, then a dso__put(), that probably will - * be the last and will then call dso__delete(), end of life. - * - * That, or at the end of the 'struct machine' lifetime, when all - * 'struct dso' instances will be removed from the list, in - * dsos__exit(), if they have no other reference from some other data - * structure. - * - * E.g.: after processing a 'perf.data' file and storing references - * to objects instantiated while processing events, we will have - * references to the 'thread', 'map', 'dso' structs all from 'struct - * hist_entry' instances, but we may not need anything not referenced, - * so we might as well call machines__exit()/machines__delete() and - * garbage collect it. - */ - dso__get(dso); -} - -void dsos__add(struct dsos *dsos, struct dso *dso) -{ - down_write(&dsos->lock); - __dsos__add(dsos, dso); - up_write(&dsos->lock); -} - -struct dso *__dsos__find(struct dsos *dsos, const char *name, bool cmp_short) -{ - struct dso *pos; - - if (cmp_short) { - list_for_each_entry(pos, &dsos->head, node) - if (strcmp(pos->short_name, name) == 0) - return pos; - return NULL; - } - return __dso__find_by_longname(&dsos->root, name); -} - -struct dso *dsos__find(struct dsos *dsos, const char *name, bool cmp_short) -{ - struct dso *dso; - down_read(&dsos->lock); - dso = __dsos__find(dsos, name, cmp_short); - up_read(&dsos->lock); - return dso; -} - -struct dso *__dsos__addnew(struct dsos *dsos, const char *name) -{ - struct dso *dso = dso__new(name); - - if (dso != NULL) { - __dsos__add(dsos, dso); - dso__set_basename(dso); - /* Put dso here because __dsos_add already got it */ - dso__put(dso); - } - return dso; -} - -struct dso *__dsos__findnew(struct dsos *dsos, const char *name) -{ - struct dso *dso = __dsos__find(dsos, name, false); - - return dso ? dso : __dsos__addnew(dsos, name); -} - -struct dso *dsos__findnew(struct dsos *dsos, const char *name) -{ - struct dso *dso; - down_write(&dsos->lock); - dso = dso__get(__dsos__findnew(dsos, name)); - up_write(&dsos->lock); - return dso; -} - -size_t __dsos__fprintf_buildid(struct list_head *head, FILE *fp, - bool (skip)(struct dso *dso, int parm), int parm) -{ - struct dso *pos; - size_t ret = 0; - - list_for_each_entry(pos, head, node) { - if (skip && skip(pos, parm)) - continue; - ret += dso__fprintf_buildid(pos, fp); - ret += fprintf(fp, " %s\n", pos->long_name); - } - return ret; -} - -size_t __dsos__fprintf(struct list_head *head, FILE *fp) -{ - struct dso *pos; - size_t ret = 0; - - list_for_each_entry(pos, head, node) { - ret += dso__fprintf(pos, fp); - } - - return ret; -} - -size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) +static size_t dso__fprintf_buildid(struct dso *dso, FILE *fp) { char sbuild_id[SBUILD_ID_SIZE]; - build_id__sprintf(dso->build_id, sizeof(dso->build_id), sbuild_id); + build_id__snprintf(dso__bid(dso), sbuild_id, sizeof(sbuild_id)); return fprintf(fp, "%s", sbuild_id); } size_t dso__fprintf(struct dso *dso, FILE *fp) { struct rb_node *nd; - size_t ret = fprintf(fp, "dso: %s (", dso->short_name); + size_t ret = fprintf(fp, "dso: %s (", dso__short_name(dso)); - if (dso->short_name != dso->long_name) - ret += fprintf(fp, "%s, ", dso->long_name); + if (dso__short_name(dso) != dso__long_name(dso)) + ret += fprintf(fp, "%s, ", dso__long_name(dso)); ret += fprintf(fp, "%sloaded, ", dso__loaded(dso) ? "" : "NOT "); ret += dso__fprintf_buildid(dso, fp); ret += fprintf(fp, ")\n"); - for (nd = rb_first(&dso->symbols); nd; nd = rb_next(nd)) { + for (nd = rb_first_cached(dso__symbols(dso)); nd; nd = rb_next(nd)) { struct symbol *pos = rb_entry(nd, struct symbol, rb_node); ret += symbol__fprintf(pos, fp); } @@ -1477,11 +1743,10 @@ size_t dso__fprintf(struct dso *dso, FILE *fp) enum dso_type dso__type(struct dso *dso, struct machine *machine) { - int fd; + int fd = -1; enum dso_type type = DSO__TYPE_UNKNOWN; - fd = dso__data_get_fd(dso, machine); - if (fd >= 0) { + if (dso__data_get_fd(dso, machine, &fd)) { type = dso__type_fd(fd); dso__data_put_fd(dso); } @@ -1491,7 +1756,7 @@ enum dso_type dso__type(struct dso *dso, struct machine *machine) int dso__strerror_load(struct dso *dso, char *buf, size_t buflen) { - int idx, errnum = dso->load_errno; + int idx, errnum = *dso__load_errno(dso); /* * This must have a same ordering as the enum dso_load_errno. */ @@ -1521,3 +1786,127 @@ int dso__strerror_load(struct dso *dso, char *buf, size_t buflen) scnprintf(buf, buflen, "%s", dso_load__error_str[idx]); return 0; } + +bool perf_pid_map_tid(const char *dso_name, int *tid) +{ + return sscanf(dso_name, "/tmp/perf-%d.map", tid) == 1; +} + +bool is_perf_pid_map_name(const char *dso_name) +{ + int tid; + + return perf_pid_map_tid(dso_name, &tid); +} + +struct find_file_offset_data { + u64 ip; + u64 offset; +}; + +/* This will be called for each PHDR in an ELF binary */ +static int find_file_offset(u64 start, u64 len, u64 pgoff, void *arg) +{ + struct find_file_offset_data *data = arg; + + if (start <= data->ip && data->ip < start + len) { + data->offset = pgoff + data->ip - start; + return 1; + } + return 0; +} + +static const u8 *__dso__read_symbol(struct dso *dso, const char *symfs_filename, + u64 start, size_t len, + u8 **out_buf, u64 *out_buf_len, bool *is_64bit) +{ + struct nscookie nsc; + int fd; + ssize_t count; + struct find_file_offset_data data = { + .ip = start, + }; + u8 *code_buf = NULL; + int saved_errno; + + nsinfo__mountns_enter(dso__nsinfo(dso), &nsc); + fd = open(symfs_filename, O_RDONLY); + saved_errno = errno; + nsinfo__mountns_exit(&nsc); + if (fd < 0) { + errno = saved_errno; + return NULL; + } + if (file__read_maps(fd, /*exe=*/true, find_file_offset, &data, is_64bit) <= 0) { + close(fd); + errno = ENOENT; + return NULL; + } + code_buf = malloc(len); + if (code_buf == NULL) { + close(fd); + errno = ENOMEM; + return NULL; + } + count = pread(fd, code_buf, len, data.offset); + saved_errno = errno; + close(fd); + if ((u64)count != len) { + free(code_buf); + errno = saved_errno; + return NULL; + } + *out_buf = code_buf; + *out_buf_len = len; + return code_buf; +} + +/* + * Read a symbol into memory for disassembly by a library like capstone of + * libLLVM. If memory is allocated out_buf holds it. + */ +const u8 *dso__read_symbol(struct dso *dso, const char *symfs_filename, + const struct map *map, const struct symbol *sym, + u8 **out_buf, u64 *out_buf_len, bool *is_64bit) +{ + u64 start = map__rip_2objdump(map, sym->start); + u64 end = map__rip_2objdump(map, sym->end); + size_t len = end - start; + + *out_buf = NULL; + *out_buf_len = 0; + *is_64bit = false; + + if (dso__binary_type(dso) == DSO_BINARY_TYPE__BPF_IMAGE) { + /* + * Note, there is fallback BPF image disassembly in the objdump + * version but it currently does nothing. + */ + errno = EOPNOTSUPP; + return NULL; + } + if (dso__binary_type(dso) == DSO_BINARY_TYPE__BPF_PROG_INFO) { +#ifdef HAVE_LIBBPF_SUPPORT + struct bpf_prog_info_node *info_node; + struct perf_bpil *info_linear; + + *is_64bit = sizeof(void *) == sizeof(u64); + info_node = perf_env__find_bpf_prog_info(dso__bpf_prog(dso)->env, + dso__bpf_prog(dso)->id); + if (!info_node) { + errno = SYMBOL_ANNOTATE_ERRNO__BPF_MISSING_BTF; + return NULL; + } + info_linear = info_node->info_linear; + assert(len <= info_linear->info.jited_prog_len); + *out_buf_len = len; + return (const u8 *)(uintptr_t)(info_linear->info.jited_prog_insns); +#else + pr_debug("No BPF program disassembly support\n"); + errno = EOPNOTSUPP; + return NULL; +#endif + } + return __dso__read_symbol(dso, symfs_filename, start, len, + out_buf, out_buf_len, is_64bit); +} |