diff --git a/tools/perf/Makefile b/tools/perf/Makefile
index 5a429966c995b86fc868e89c9248f0f5d20d89ed..495eb6d97fa07953390c0b3f38c7ea229e6fb6b5 100644
--- a/tools/perf/Makefile
+++ b/tools/perf/Makefile
@@ -342,6 +342,7 @@ LIB_H += util/values.h
LIB_H += util/sort.h
LIB_H += util/hist.h
LIB_H += util/thread.h
+LIB_H += util/data_map.h
LIB_OBJS += util/abspath.o
LIB_OBJS += util/alias.o
@@ -378,6 +379,7 @@ LIB_OBJS += util/trace-event-info.o
LIB_OBJS += util/svghelper.o
LIB_OBJS += util/sort.o
LIB_OBJS += util/hist.o
+LIB_OBJS += util/data_map.o
BUILTIN_OBJS += builtin-annotate.o
BUILTIN_OBJS += builtin-help.o
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 12f8c868fcd7dda57da90918321af4cbb4c70fbd..87c4582303bfa97f24e8fd4c8c9c87fb88daa9a6 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -26,6 +26,7 @@
#include "util/parse-options.h"
#include "util/parse-events.h"
+#include "util/data_map.h"
#include "util/thread.h"
#include "util/sort.h"
#include "util/hist.h"
@@ -37,7 +38,6 @@ static char *dso_list_str, *comm_list_str, *sym_list_str,
static struct strlist *dso_list, *comm_list, *sym_list;
static int force;
-static int input;
static int full_paths;
static int show_nr_samples;
@@ -48,15 +48,11 @@ static struct perf_read_values show_threads_values;
static char default_pretty_printing_style[] = "normal";
static char *pretty_printing_style = default_pretty_printing_style;
-static unsigned long page_size;
-static unsigned long mmap_window = 32;
-
static int exclude_other = 1;
static char callchain_default_opt[] = "fractal,0.5";
-static char __cwd[PATH_MAX];
-static char *cwd = __cwd;
+static char *cwd;
static int cwdlen;
static struct rb_root threads;
@@ -815,208 +811,71 @@ process_read_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)
-{
- trace_event(event);
-
- switch (event->header.type) {
- case PERF_RECORD_SAMPLE:
- return process_sample_event(event, offset, head);
-
- case PERF_RECORD_MMAP:
- return process_mmap_event(event, offset, head);
-
- case PERF_RECORD_COMM:
- return process_comm_event(event, offset, head);
-
- case PERF_RECORD_FORK:
- case PERF_RECORD_EXIT:
- return process_task_event(event, offset, head);
-
- case PERF_RECORD_LOST:
- return process_lost_event(event, offset, head);
-
- case PERF_RECORD_READ:
- return process_read_event(event, offset, head);
-
- /*
- * We dont process them right now but they are fine:
- */
-
- case PERF_RECORD_THROTTLE:
- case PERF_RECORD_UNTHROTTLE:
- return 0;
-
- default:
- return -1;
- }
-
- return 0;
-}
-
-static int __cmd_report(void)
+static int sample_type_check(u64 type)
{
- int ret, rc = EXIT_FAILURE;
- unsigned long offset = 0;
- unsigned long head, shift;
- struct stat input_stat;
- struct thread *idle;
- event_t *event;
- uint32_t size;
- char *buf;
-
- idle = register_idle_thread(&threads, &last_match);
- thread__comm_adjust(idle);
-
- if (show_threads)
- perf_read_values_init(&show_threads_values);
-
- input = open(input_name, O_RDONLY);
- if (input < 0) {
- fprintf(stderr, " failed to open file: %s", input_name);
- if (!strcmp(input_name, "perf.data"))
- fprintf(stderr, " (try 'perf record' first)");
- fprintf(stderr, "\n");
- exit(-1);
- }
-
- ret = fstat(input, &input_stat);
- if (ret < 0) {
- perror("failed to stat file");
- exit(-1);
- }
-
- if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
- fprintf(stderr, "file: %s not owned by current user or root\n", input_name);
- exit(-1);
- }
-
- if (!input_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);
+ sample_type = type;
if (!(sample_type & PERF_SAMPLE_CALLCHAIN)) {
if (sort__has_parent) {
fprintf(stderr, "selected --sort parent, but no"
" callchain data. Did you call"
" perf record without -g?\n");
- exit(-1);
+ return -1;
}
if (callchain) {
fprintf(stderr, "selected -g but no callchain data."
" Did you call perf record without"
" -g?\n");
- exit(-1);
+ return -1;
}
} else if (callchain_param.mode != CHAIN_NONE && !callchain) {
callchain = 1;
if (register_callchain_param(&callchain_param) < 0) {
fprintf(stderr, "Can't register callchain"
" params\n");
- exit(-1);
+ return -1;
}
}
- if (load_kernel() < 0) {
- perror("failed to load kernel symbols");
- return EXIT_FAILURE;
- }
-
- if (!full_paths) {
- if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
- perror("failed to get the current directory");
- return EXIT_FAILURE;
- }
- cwdlen = strlen(cwd);
- } else {
- cwd = NULL;
- cwdlen = 0;
- }
-
- 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);
-
- 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);
-
- total_unknown++;
+ return 0;
+}
- /*
- * assume we lost track of the stream, check alignment, and
- * increment a single u64 in the hope to catch on again 'soon'.
- */
+static struct perf_file_handler file_handler = {
+ .process_sample_event = process_sample_event,
+ .process_mmap_event = process_mmap_event,
+ .process_comm_event = process_comm_event,
+ .process_exit_event = process_task_event,
+ .process_fork_event = process_task_event,
+ .process_lost_event = process_lost_event,
+ .process_read_event = process_read_event,
+ .sample_type_check = sample_type_check,
+};
- if (unlikely(head & 7))
- head &= ~7ULL;
- size = 8;
- }
+static int __cmd_report(void)
+{
+ struct thread *idle;
+ int ret;
- head += size;
+ idle = register_idle_thread(&threads, &last_match);
+ thread__comm_adjust(idle);
- if (offset + head >= header->data_offset + header->data_size)
- goto done;
+ if (show_threads)
+ perf_read_values_init(&show_threads_values);
- if (offset + head < (unsigned long)input_stat.st_size)
- goto more;
+ register_perf_file_handler(&file_handler);
-done:
- rc = EXIT_SUCCESS;
- close(input);
+ ret = mmap_dispatch_perf_file(&header, input_name, force, full_paths,
+ &cwdlen, &cwd);
+ if (ret)
+ return ret;
dump_printf(" IP events: %10ld\n", total);
dump_printf(" mmap events: %10ld\n", total_mmap);
dump_printf(" comm events: %10ld\n", total_comm);
dump_printf(" fork events: %10ld\n", total_fork);
dump_printf(" lost events: %10ld\n", total_lost);
- dump_printf(" unknown events: %10ld\n", total_unknown);
+ dump_printf(" unknown events: %10ld\n", file_handler.total_unknown);
if (dump_trace)
return 0;
@@ -1034,7 +893,7 @@ static int __cmd_report(void)
if (show_threads)
perf_read_values_destroy(&show_threads_values);
- return rc;
+ return ret;
}
static int
@@ -1177,8 +1036,6 @@ int cmd_report(int argc, const char **argv, const char *prefix __used)
{
symbol__init();
- page_size = getpagesize();
-
argc = parse_options(argc, argv, options, report_usage, 0);
setup_sorting();
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 18871380b0155cd1562a376e1d7208e935695214..e1df7055ab823f718b02669037ff0b08251e244b 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -11,6 +11,7 @@
#include "util/trace-event.h"
#include "util/debug.h"
+#include "util/data_map.h"
#include <sys/types.h>
#include <sys/prctl.h>
@@ -20,9 +21,6 @@
#include <math.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_comm = 0;
@@ -35,6 +33,9 @@ static u64 sample_type;
static char default_sort_order[] = "avg, max, switch, runtime";
static char *sort_order = default_sort_order;
+static char *cwd;
+static int cwdlen;
+
#define PR_SET_NAME 15 /* Set process name */
#define MAX_CPUS 4096
@@ -1594,129 +1595,43 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head)
}
static int
-process_event(event_t *event, unsigned long offset, unsigned long head)
+process_lost_event(event_t *event __used,
+ unsigned long offset __used,
+ unsigned long head __used)
{
- trace_event(event);
-
- nr_events++;
- switch (event->header.type) {
- case PERF_RECORD_MMAP:
- return 0;
- case PERF_RECORD_LOST:
- nr_lost_chunks++;
- nr_lost_events += event->lost.lost;
- return 0;
-
- case PERF_RECORD_COMM:
- return process_comm_event(event, offset, head);
+ nr_lost_chunks++;
+ nr_lost_events += event->lost.lost;
- case PERF_RECORD_EXIT ... PERF_RECORD_READ:
- return 0;
+ return 0;
+}
- case PERF_RECORD_SAMPLE:
- return process_sample_event(event, offset, head);
+static int sample_type_check(u64 type)
+{
+ sample_type = type;
- 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,
+ .process_lost_event = process_lost_event,
+ .sample_type_check = sample_type_check,
+};
+
static int read_events(void)
{
- int ret, rc = EXIT_FAILURE;
- unsigned long offset = 0;
- unsigned long head = 0;
- 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;
- }
-
-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);
-
- size = event->header.size;
- if (!size)
- size = 8;
-
- if (head + event->header.size >= page_size * mmap_window) {
- unsigned long shift = page_size * (head / page_size);
- int res;
-
- 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 void print_bad_events(void)
@@ -1934,7 +1849,6 @@ static int __cmd_record(int argc, const char **argv)
int cmd_sched(int argc, const char **argv, const char *prefix __used)
{
symbol__init();
- page_size = getpagesize();
argc = parse_options(argc, argv, sched_options, sched_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index d9abb4ae5f795fbe40db652643652265b959abae..fb3f3c220211839c8eb79aaa6765749ef87ef806 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) {
diff --git a/tools/perf/util/data_map.c b/tools/perf/util/data_map.c
new file mode 100644
index 0000000000000000000000000000000000000000..242b0555ab913b14e86e6192102f8dfac1e5c5e4
--- /dev/null
+++ b/tools/perf/util/data_map.c
@@ -0,0 +1,222 @@
+#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,
+ unsigned long offset __used,
+ unsigned long head __used)
+{
+ 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 int
+process_event(event_t *event, unsigned long offset, unsigned long head)
+{
+ trace_event(event);
+
+ switch (event->header.type) {
+ case PERF_RECORD_SAMPLE:
+ return curr_handler->process_sample_event(event, offset, head);
+ case PERF_RECORD_MMAP:
+ return curr_handler->process_mmap_event(event, offset, head);
+ case PERF_RECORD_COMM:
+ return curr_handler->process_comm_event(event, offset, head);
+ case PERF_RECORD_FORK:
+ return curr_handler->process_fork_event(event, offset, head);
+ case PERF_RECORD_EXIT:
+ return curr_handler->process_exit_event(event, offset, head);
+ case PERF_RECORD_LOST:
+ return curr_handler->process_lost_event(event, offset, head);
+ case PERF_RECORD_READ:
+ return curr_handler->process_read_event(event, offset, head);
+ case PERF_RECORD_THROTTLE:
+ return curr_handler->process_throttle_event(event, offset, head);
+ case PERF_RECORD_UNTHROTTLE:
+ return curr_handler->process_unthrottle_event(event, offset, head);
+ default:
+ curr_handler->total_unknown++;
+ return -1;
+ }
+}
+
+int mmap_dispatch_perf_file(struct perf_header **pheader,
+ const char *input_name,
+ int force,
+ int full_paths,
+ int *cwdlen,
+ char **cwd)
+{
+ int ret, rc = EXIT_FAILURE;
+ 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)
+ die("Forgot to register perf file handler");
+
+ page_size = getpagesize();
+
+ input = open(input_name, O_RDONLY);
+ if (input < 0) {
+ fprintf(stderr, " failed to open file: %s", input_name);
+ if (!strcmp(input_name, "perf.data"))
+ fprintf(stderr, " (try 'perf record' first)");
+ fprintf(stderr, "\n");
+ exit(-1);
+ }
+
+ ret = fstat(input, &input_stat);
+ if (ret < 0) {
+ perror("failed to stat file");
+ exit(-1);
+ }
+
+ if (!force && input_stat.st_uid && (input_stat.st_uid != geteuid())) {
+ fprintf(stderr, "file: %s not owned by current user or root\n",
+ input_name);
+ exit(-1);
+ }
+
+ if (!input_stat.st_size) {
+ fprintf(stderr, "zero-sized file, nothing to do!\n");
+ exit(0);
+ }
+
+ *pheader = perf_header__read(input);
+ header = *pheader;
+ head = header->data_offset;
+
+ sample_type = perf_header__sample_type(header);
+
+ if (curr_handler->sample_type_check)
+ if (curr_handler->sample_type_check(sample_type) < 0)
+ exit(-1);
+
+ if (load_kernel() < 0) {
+ perror("failed to load kernel symbols");
+ return EXIT_FAILURE;
+ }
+
+ if (!full_paths) {
+ if (getcwd(__cwd, sizeof(__cwd)) == NULL) {
+ perror("failed to get the current directory");
+ return EXIT_FAILURE;
+ }
+ *cwd = __cwd;
+ *cwdlen = strlen(*cwd);
+ } else {
+ *cwd = NULL;
+ *cwdlen = 0;
+ }
+
+ 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);
+
+ 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:
+ rc = EXIT_SUCCESS;
+ close(input);
+
+ return rc;
+}
+
+
diff --git a/tools/perf/util/data_map.h b/tools/perf/util/data_map.h
new file mode 100644
index 0000000000000000000000000000000000000000..716d1053b074f5919e4afc5dcdb76177028cb096
--- /dev/null
+++ b/tools/perf/util/data_map.h
@@ -0,0 +1,31 @@
+#ifndef __PERF_DATAMAP_H
+#define __PERF_DATAMAP_H
+
+#include "event.h"
+#include "header.h"
+
+typedef int (*event_type_handler_t)(event_t *, unsigned long, unsigned long);
+
+struct perf_file_handler {
+ event_type_handler_t process_sample_event;
+ event_type_handler_t process_mmap_event;
+ event_type_handler_t process_comm_event;
+ event_type_handler_t process_fork_event;
+ event_type_handler_t process_exit_event;
+ event_type_handler_t process_lost_event;
+ event_type_handler_t process_read_event;
+ event_type_handler_t process_throttle_event;
+ event_type_handler_t process_unthrottle_event;
+ int (*sample_type_check)(u64 sample_type);
+ unsigned long total_unknown;
+};
+
+void register_perf_file_handler(struct perf_file_handler *handler);
+int mmap_dispatch_perf_file(struct perf_header **pheader,
+ const char *input_name,
+ int force,
+ int full_paths,
+ int *cwdlen,
+ char **cwd);
+
+#endif