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-rw-r--r--tools/perf/util/data_map.c291
1 files changed, 291 insertions, 0 deletions
diff --git a/tools/perf/util/data_map.c b/tools/perf/util/data_map.c
new file mode 100644
index 00000000000..ca0bedf637c
--- /dev/null
+++ b/tools/perf/util/data_map.c
@@ -0,0 +1,291 @@
+#include "data_map.h"
+#include "symbol.h"
+#include "util.h"
+#include "debug.h"
+
+
+static struct perf_file_handler *curr_handler;
+static unsigned long mmap_window = 32;
+static char __cwd[PATH_MAX];
+
+static int process_event_stub(event_t *event __used)
+{
+ dump_printf(": unhandled!\n");
+ return 0;
+}
+
+void register_perf_file_handler(struct perf_file_handler *handler)
+{
+ if (!handler->process_sample_event)
+ handler->process_sample_event = process_event_stub;
+ if (!handler->process_mmap_event)
+ handler->process_mmap_event = process_event_stub;
+ if (!handler->process_comm_event)
+ handler->process_comm_event = process_event_stub;
+ if (!handler->process_fork_event)
+ handler->process_fork_event = process_event_stub;
+ if (!handler->process_exit_event)
+ handler->process_exit_event = process_event_stub;
+ if (!handler->process_lost_event)
+ handler->process_lost_event = process_event_stub;
+ if (!handler->process_read_event)
+ handler->process_read_event = process_event_stub;
+ if (!handler->process_throttle_event)
+ handler->process_throttle_event = process_event_stub;
+ if (!handler->process_unthrottle_event)
+ handler->process_unthrottle_event = process_event_stub;
+
+ curr_handler = handler;
+}
+
+static const char *event__name[] = {
+ [0] = "TOTAL",
+ [PERF_RECORD_MMAP] = "MMAP",
+ [PERF_RECORD_LOST] = "LOST",
+ [PERF_RECORD_COMM] = "COMM",
+ [PERF_RECORD_EXIT] = "EXIT",
+ [PERF_RECORD_THROTTLE] = "THROTTLE",
+ [PERF_RECORD_UNTHROTTLE] = "UNTHROTTLE",
+ [PERF_RECORD_FORK] = "FORK",
+ [PERF_RECORD_READ] = "READ",
+ [PERF_RECORD_SAMPLE] = "SAMPLE",
+};
+
+unsigned long event__total[PERF_RECORD_MAX];
+
+void event__print_totals(void)
+{
+ int i;
+ for (i = 0; i < PERF_RECORD_MAX; ++i)
+ pr_info("%10s events: %10ld\n",
+ event__name[i], event__total[i]);
+}
+
+static int
+process_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ trace_event(event);
+
+ if (event->header.type < PERF_RECORD_MAX) {
+ dump_printf("%p [%p]: PERF_RECORD_%s",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event__name[event->header.type]);
+ ++event__total[0];
+ ++event__total[event->header.type];
+ }
+
+ switch (event->header.type) {
+ case PERF_RECORD_SAMPLE:
+ return curr_handler->process_sample_event(event);
+ case PERF_RECORD_MMAP:
+ return curr_handler->process_mmap_event(event);
+ case PERF_RECORD_COMM:
+ return curr_handler->process_comm_event(event);
+ case PERF_RECORD_FORK:
+ return curr_handler->process_fork_event(event);
+ case PERF_RECORD_EXIT:
+ return curr_handler->process_exit_event(event);
+ case PERF_RECORD_LOST:
+ return curr_handler->process_lost_event(event);
+ case PERF_RECORD_READ:
+ return curr_handler->process_read_event(event);
+ case PERF_RECORD_THROTTLE:
+ return curr_handler->process_throttle_event(event);
+ case PERF_RECORD_UNTHROTTLE:
+ return curr_handler->process_unthrottle_event(event);
+ default:
+ curr_handler->total_unknown++;
+ return -1;
+ }
+}
+
+int perf_header__read_build_ids(int input, off_t offset, off_t size)
+{
+ struct build_id_event bev;
+ char filename[PATH_MAX];
+ off_t limit = offset + size;
+ int err = -1;
+
+ while (offset < limit) {
+ struct dso *dso;
+ ssize_t len;
+
+ if (read(input, &bev, sizeof(bev)) != sizeof(bev))
+ goto out;
+
+ len = bev.header.size - sizeof(bev);
+ if (read(input, filename, len) != len)
+ goto out;
+
+ dso = dsos__findnew(filename);
+ if (dso != NULL)
+ dso__set_build_id(dso, &bev.build_id);
+
+ offset += bev.header.size;
+ }
+ err = 0;
+out:
+ return err;
+}
+
+int mmap_dispatch_perf_file(struct perf_header **pheader,
+ const char *input_name,
+ int force,
+ int full_paths,
+ int *cwdlen,
+ char **cwd)
+{
+ int err;
+ struct perf_header *header;
+ unsigned long head, shift;
+ unsigned long offset = 0;
+ struct stat input_stat;
+ size_t page_size;
+ u64 sample_type;
+ event_t *event;
+ uint32_t size;
+ int input;
+ char *buf;
+
+ if (curr_handler == NULL) {
+ pr_debug("Forgot to register perf file handler\n");
+ return -EINVAL;
+ }
+
+ page_size = getpagesize();
+
+ input = open(input_name, O_RDONLY);
+ if (input < 0) {
+ pr_err("Failed to open file: %s", input_name);
+ if (!strcmp(input_name, "perf.data"))
+ pr_err(" (try 'perf record' first)");
+ pr_err("\n");
+ return -errno;
+ }
+
+ if (fstat(input, &input_stat) < 0) {
+ pr_err("failed to stat file");
+ err = -errno;
+ goto out_close;
+ }
+
+ err = -EACCES;
+ if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
+ pr_err("file: %s not owned by current user or root\n",
+ input_name);
+ goto out_close;
+ }
+
+ if (input_stat.st_size == 0) {
+ pr_info("zero-sized file, nothing to do!\n");
+ goto done;
+ }
+
+ err = -ENOMEM;
+ header = perf_header__new();
+ if (header == NULL)
+ goto out_close;
+
+ err = perf_header__read(header, input);
+ if (err < 0)
+ goto out_delete;
+ *pheader = header;
+ head = header->data_offset;
+
+ sample_type = perf_header__sample_type(header);
+
+ err = -EINVAL;
+ if (curr_handler->sample_type_check &&
+ curr_handler->sample_type_check(sample_type) < 0)
+ goto out_delete;
+
+ if (!full_paths) {
+ if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
+ pr_err("failed to get the current directory\n");
+ err = -errno;
+ goto out_delete;
+ }
+ *cwd = __cwd;
+ *cwdlen = strlen(*cwd);
+ } else {
+ *cwd = NULL;
+ *cwdlen = 0;
+ }
+
+ shift = page_size * (head / page_size);
+ offset += shift;
+ head -= shift;
+
+remap:
+ buf = mmap(NULL, page_size * mmap_window, PROT_READ,
+ MAP_SHARED, input, offset);
+ if (buf == MAP_FAILED) {
+ pr_err("failed to mmap file\n");
+ err = -errno;
+ goto out_delete;
+ }
+
+more:
+ event = (event_t *)(buf + head);
+
+ size = event->header.size;
+ if (!size)
+ size = 8;
+
+ if (head + event->header.size >= page_size * mmap_window) {
+ int munmap_ret;
+
+ shift = page_size * (head / page_size);
+
+ munmap_ret = munmap(buf, page_size * mmap_window);
+ assert(munmap_ret == 0);
+
+ offset += shift;
+ head -= shift;
+ goto remap;
+ }
+
+ size = event->header.size;
+
+ dump_printf("\n%p [%p]: event: %d\n",
+ (void *)(offset + head),
+ (void *)(long)event->header.size,
+ event->header.type);
+
+ if (!size || process_event(event, offset, head) < 0) {
+
+ dump_printf("%p [%p]: skipping unknown header type: %d\n",
+ (void *)(offset + head),
+ (void *)(long)(event->header.size),
+ event->header.type);
+
+ /*
+ * assume we lost track of the stream, check alignment, and
+ * increment a single u64 in the hope to catch on again 'soon'.
+ */
+
+ if (unlikely(head & 7))
+ head &= ~7ULL;
+
+ size = 8;
+ }
+
+ head += size;
+
+ if (offset + head >= header->data_offset + header->data_size)
+ goto done;
+
+ if (offset + head < (unsigned long)input_stat.st_size)
+ goto more;
+
+done:
+ err = 0;
+out_close:
+ close(input);
+
+ return err;
+out_delete:
+ perf_header__delete(header);
+ goto out_close;
+}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-22 17:03:37 +0000