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Diffstat (limited to 'tools/perf/builtin-trace.c')
-rw-r--r--tools/perf/builtin-trace.c129
1 files changed, 18 insertions, 111 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index d9abb4ae5f79..fb3f3c220211 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -12,11 +12,9 @@
#include "util/debug.h"
#include "util/trace-event.h"
+#include "util/data_map.h"
static char const *input_name = "perf.data";
-static int input;
-static unsigned long page_size;
-static unsigned long mmap_window = 32;
static unsigned long total = 0;
static unsigned long total_comm = 0;
@@ -27,6 +25,9 @@ static struct thread *last_match;
static struct perf_header *header;
static u64 sample_type;
+static char *cwd;
+static int cwdlen;
+
static int
process_comm_event(event_t *event, unsigned long offset, unsigned long head)
@@ -112,125 +113,32 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
return 0;
}
-static int
-process_event(event_t *event, unsigned long offset, unsigned long head)
+static int sample_type_check(u64 type)
{
- trace_event(event);
-
- switch (event->header.type) {
- case PERF_RECORD_MMAP ... PERF_RECORD_LOST:
- return 0;
-
- case PERF_RECORD_COMM:
- return process_comm_event(event, offset, head);
-
- case PERF_RECORD_EXIT ... PERF_RECORD_READ:
- return 0;
+ sample_type = type;
- case PERF_RECORD_SAMPLE:
- return process_sample_event(event, offset, head);
-
- case PERF_RECORD_MAX:
- default:
+ if (!(sample_type & PERF_SAMPLE_RAW)) {
+ fprintf(stderr,
+ "No trace sample to read. Did you call perf record "
+ "without -R?");
return -1;
}
return 0;
}
+static struct perf_file_handler file_handler = {
+ .process_sample_event = process_sample_event,
+ .process_comm_event = process_comm_event,
+ .sample_type_check = sample_type_check,
+};
+
static int __cmd_trace(void)
{
- int ret, rc = EXIT_FAILURE;
- unsigned long offset = 0;
- unsigned long head = 0;
- unsigned long shift;
- struct stat perf_stat;
- event_t *event;
- uint32_t size;
- char *buf;
-
register_idle_thread(&threads, &last_match);
+ register_perf_file_handler(&file_handler);
- input = open(input_name, O_RDONLY);
- if (input < 0) {
- perror("failed to open file");
- exit(-1);
- }
-
- ret = fstat(input, &perf_stat);
- if (ret < 0) {
- perror("failed to stat file");
- exit(-1);
- }
-
- if (!perf_stat.st_size) {
- fprintf(stderr, "zero-sized file, nothing to do!\n");
- exit(0);
- }
- header = perf_header__read(input);
- head = header->data_offset;
- sample_type = perf_header__sample_type(header);
-
- if (!(sample_type & PERF_SAMPLE_RAW))
- die("No trace sample to read. Did you call perf record "
- "without -R?");
-
- if (load_kernel() < 0) {
- perror("failed to load kernel symbols");
- return EXIT_FAILURE;
- }
-
- shift = page_size * (head / page_size);
- offset += shift;
- head -= shift;
-
-remap:
- buf = (char *)mmap(NULL, page_size * mmap_window, PROT_READ,
- MAP_SHARED, input, offset);
- if (buf == MAP_FAILED) {
- perror("failed to mmap file");
- exit(-1);
- }
-
-more:
- event = (event_t *)(buf + head);
-
- if (head + event->header.size >= page_size * mmap_window) {
- int res;
-
- shift = page_size * (head / page_size);
- res = munmap(buf, page_size * mmap_window);
- assert(res == 0);
-
- offset += shift;
- head -= shift;
- goto remap;
- }
-
- size = event->header.size;
-
- if (!size || process_event(event, offset, head) < 0) {
-
- /*
- * 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 < (unsigned long)perf_stat.st_size)
- goto more;
-
- rc = EXIT_SUCCESS;
- close(input);
-
- return rc;
+ return mmap_dispatch_perf_file(&header, input_name, 0, 0, &cwdlen, &cwd);
}
static const char * const annotate_usage[] = {
@@ -249,7 +157,6 @@ static const struct option options[] = {
int cmd_trace(int argc, const char **argv, const char *prefix __used)
{
symbol__init();
- page_size = getpagesize();
argc = parse_options(argc, argv, options, annotate_usage, 0);
if (argc) {