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) {