diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/Makefile.perf | 1 | ||||
| -rw-r--r-- | tools/perf/builtin-record.c | 34 | ||||
| -rw-r--r-- | tools/perf/builtin-top.c | 9 | ||||
| -rw-r--r-- | tools/perf/util/data.c | 120 | ||||
| -rw-r--r-- | tools/perf/util/data.h | 4 | ||||
| -rw-r--r-- | tools/perf/util/session.c | 95 | ||||
| -rw-r--r-- | tools/perf/util/session.h | 2 |
7 files changed, 158 insertions, 107 deletions
diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf index c873e03..326a26e 100644 --- a/tools/perf/Makefile.perf +++ b/tools/perf/Makefile.perf @@ -365,6 +365,7 @@ LIB_OBJS += $(OUTPUT)util/vdso.o LIB_OBJS += $(OUTPUT)util/stat.o LIB_OBJS += $(OUTPUT)util/record.o LIB_OBJS += $(OUTPUT)util/srcline.o +LIB_OBJS += $(OUTPUT)util/data.o LIB_OBJS += $(OUTPUT)ui/setup.o LIB_OBJS += $(OUTPUT)ui/helpline.o diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index 4ea46ff..428e28f 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -345,8 +345,6 @@ out: static int __cmd_record(struct perf_record *rec, int argc, const char **argv) { - struct stat st; - int flags; int err, feat; unsigned long waking = 0; const bool forks = argc > 0; @@ -355,7 +353,6 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv) struct perf_record_opts *opts = &rec->opts; struct perf_evlist *evsel_list = rec->evlist; struct perf_data_file *file = &rec->file; - const char *output_name = file->path; struct perf_session *session; bool disabled = false; @@ -367,35 +364,6 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv) signal(SIGUSR1, sig_handler); signal(SIGTERM, sig_handler); - if (!output_name) { - if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode)) - file->is_pipe = true; - else - file->path = output_name = "perf.data"; - } - if (output_name) { - if (!strcmp(output_name, "-")) - file->is_pipe = true; - else if (!stat(output_name, &st) && st.st_size) { - char oldname[PATH_MAX]; - snprintf(oldname, sizeof(oldname), "%s.old", - output_name); - unlink(oldname); - rename(output_name, oldname); - } - } - - flags = O_CREAT|O_RDWR|O_TRUNC; - - if (file->is_pipe) - file->fd = STDOUT_FILENO; - else - file->fd = open(output_name, flags, S_IRUSR | S_IWUSR); - if (file->fd < 0) { - perror("failed to create output file"); - return -1; - } - session = perf_session__new(file, false, NULL); if (session == NULL) { pr_err("Not enough memory for reading perf file header\n"); @@ -586,7 +554,7 @@ static int __cmd_record(struct perf_record *rec, int argc, const char **argv) fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", (double)rec->bytes_written / 1024.0 / 1024.0, - output_name, + file->path, rec->bytes_written / 24); return 0; diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 752bebe..d934f70 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -929,15 +929,8 @@ static int __cmd_top(struct perf_top *top) struct perf_record_opts *opts = &top->record_opts; pthread_t thread; int ret; - struct perf_data_file file = { - .mode = PERF_DATA_MODE_WRITE, - }; - /* - * FIXME: perf_session__new should allow passing a O_MMAP, so that all this - * mmap reading, etc is encapsulated in it. Use O_WRONLY for now. - */ - top->session = perf_session__new(&file, false, NULL); + top->session = perf_session__new(NULL, false, NULL); if (top->session == NULL) return -ENOMEM; diff --git a/tools/perf/util/data.c b/tools/perf/util/data.c new file mode 100644 index 0000000..7d09faf --- /dev/null +++ b/tools/perf/util/data.c @@ -0,0 +1,120 @@ +#include <linux/compiler.h> +#include <linux/kernel.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <unistd.h> +#include <string.h> + +#include "data.h" +#include "util.h" + +static bool check_pipe(struct perf_data_file *file) +{ + struct stat st; + bool is_pipe = false; + int fd = perf_data_file__is_read(file) ? + STDIN_FILENO : STDOUT_FILENO; + + if (!file->path) { + if (!fstat(fd, &st) && S_ISFIFO(st.st_mode)) + is_pipe = true; + } else { + if (!strcmp(file->path, "-")) + is_pipe = true; + } + + if (is_pipe) + file->fd = fd; + + return file->is_pipe = is_pipe; +} + +static int check_backup(struct perf_data_file *file) +{ + struct stat st; + + if (!stat(file->path, &st) && st.st_size) { + /* TODO check errors properly */ + char oldname[PATH_MAX]; + snprintf(oldname, sizeof(oldname), "%s.old", + file->path); + unlink(oldname); + rename(file->path, oldname); + } + + return 0; +} + +static int open_file_read(struct perf_data_file *file) +{ + struct stat st; + int fd; + + fd = open(file->path, O_RDONLY); + if (fd < 0) { + int err = errno; + + pr_err("failed to open %s: %s", file->path, strerror(err)); + if (err == ENOENT && !strcmp(file->path, "perf.data")) + pr_err(" (try 'perf record' first)"); + pr_err("\n"); + return -err; + } + + if (fstat(fd, &st) < 0) + goto out_close; + + if (!file->force && st.st_uid && (st.st_uid != geteuid())) { + pr_err("file %s not owned by current user or root\n", + file->path); + goto out_close; + } + + if (!st.st_size) { + pr_info("zero-sized file (%s), nothing to do!\n", + file->path); + goto out_close; + } + + file->size = st.st_size; + return fd; + + out_close: + close(fd); + return -1; +} + +static int open_file_write(struct perf_data_file *file) +{ + if (check_backup(file)) + return -1; + + return open(file->path, O_CREAT|O_RDWR|O_TRUNC, S_IRUSR|S_IWUSR); +} + +static int open_file(struct perf_data_file *file) +{ + int fd; + + fd = perf_data_file__is_read(file) ? + open_file_read(file) : open_file_write(file); + + file->fd = fd; + return fd < 0 ? -1 : 0; +} + +int perf_data_file__open(struct perf_data_file *file) +{ + if (check_pipe(file)) + return 0; + + if (!file->path) + file->path = "perf.data"; + + return open_file(file); +} + +void perf_data_file__close(struct perf_data_file *file) +{ + close(file->fd); +} diff --git a/tools/perf/util/data.h b/tools/perf/util/data.h index ffa0186..d6c262e 100644 --- a/tools/perf/util/data.h +++ b/tools/perf/util/data.h @@ -13,6 +13,7 @@ struct perf_data_file { int fd; bool is_pipe; bool force; + unsigned long size; enum perf_data_mode mode; }; @@ -26,4 +27,7 @@ static inline bool perf_data_file__is_write(struct perf_data_file *file) return file->mode == PERF_DATA_MODE_WRITE; } +int perf_data_file__open(struct perf_data_file *file); +void perf_data_file__close(struct perf_data_file *file); + #endif /* __PERF_DATA_H */ diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index e3f63df..d857c18 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -16,73 +16,35 @@ #include "perf_regs.h" #include "vdso.h" -static int perf_session__open(struct perf_session *self, bool force) +static int perf_session__open(struct perf_session *self) { - struct stat input_stat; - - if (!strcmp(self->filename, "-")) { - self->fd_pipe = true; - self->fd = STDIN_FILENO; - + if (self->fd_pipe) { if (perf_session__read_header(self) < 0) pr_err("incompatible file format (rerun with -v to learn more)"); - return 0; } - self->fd = open(self->filename, O_RDONLY); - if (self->fd < 0) { - int err = errno; - - pr_err("failed to open %s: %s", self->filename, strerror(err)); - if (err == ENOENT && !strcmp(self->filename, "perf.data")) - pr_err(" (try 'perf record' first)"); - pr_err("\n"); - return -errno; - } - - if (fstat(self->fd, &input_stat) < 0) - goto out_close; - - if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) { - pr_err("file %s not owned by current user or root\n", - self->filename); - goto out_close; - } - - if (!input_stat.st_size) { - pr_info("zero-sized file (%s), nothing to do!\n", - self->filename); - goto out_close; - } - if (perf_session__read_header(self) < 0) { pr_err("incompatible file format (rerun with -v to learn more)"); - goto out_close; + return -1; } if (!perf_evlist__valid_sample_type(self->evlist)) { pr_err("non matching sample_type"); - goto out_close; + return -1; } if (!perf_evlist__valid_sample_id_all(self->evlist)) { pr_err("non matching sample_id_all"); - goto out_close; + return -1; } if (!perf_evlist__valid_read_format(self->evlist)) { pr_err("non matching read_format"); - goto out_close; + return -1; } - self->size = input_stat.st_size; return 0; - -out_close: - close(self->fd); - self->fd = -1; - return -1; } void perf_session__set_id_hdr_size(struct perf_session *session) @@ -110,35 +72,35 @@ struct perf_session *perf_session__new(struct perf_data_file *file, bool repipe, struct perf_tool *tool) { struct perf_session *self; - const char *filename = file->path; - struct stat st; - size_t len; - - if (!filename || !strlen(filename)) { - if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) - filename = "-"; - else - filename = "perf.data"; - } - len = strlen(filename); - self = zalloc(sizeof(*self) + len); - - if (self == NULL) + self = zalloc(sizeof(*self)); + if (!self) goto out; - memcpy(self->filename, filename, len); self->repipe = repipe; INIT_LIST_HEAD(&self->ordered_samples.samples); INIT_LIST_HEAD(&self->ordered_samples.sample_cache); INIT_LIST_HEAD(&self->ordered_samples.to_free); machines__init(&self->machines); - if (perf_data_file__is_read(file)) { - if (perf_session__open(self, file->force) < 0) + if (file) { + if (perf_data_file__open(file)) goto out_delete; - perf_session__set_id_hdr_size(self); - } else if (perf_data_file__is_write(file)) { + + self->fd = file->fd; + self->fd_pipe = file->is_pipe; + self->filename = file->path; + self->size = file->size; + + if (perf_data_file__is_read(file)) { + if (perf_session__open(self) < 0) + goto out_close; + + perf_session__set_id_hdr_size(self); + } + } + + if (!file || perf_data_file__is_write(file)) { /* * In O_RDONLY mode this will be performed when reading the * kernel MMAP event, in perf_event__process_mmap(). @@ -153,10 +115,13 @@ struct perf_session *perf_session__new(struct perf_data_file *file, tool->ordered_samples = false; } -out: return self; -out_delete: + + out_close: + perf_data_file__close(file); + out_delete: perf_session__delete(self); + out: return NULL; } diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h index f2f6251..e1ca2d0 100644 --- a/tools/perf/util/session.h +++ b/tools/perf/util/session.h @@ -39,7 +39,7 @@ struct perf_session { bool fd_pipe; bool repipe; struct ordered_samples ordered_samples; - char filename[1]; + const char *filename; }; #define PRINT_IP_OPT_IP (1<<0) |
