[Crash-utility] [PATCH] extensions: remove trace.c and point to the new repository
HAGIO KAZUHITO(萩尾 一仁)
k-hagio-ab at nec.com
Fri Mar 26 04:33:18 UTC 2021
The trace.c extension module moved to the separate repository:
https://github.com/fujitsu/crash-trace
Remove the trace.c file from the crash repository and instead add
trace.c.README file to point to the new repository for a while.
Signed-off-by: Kazuhito Hagio <k-hagio-ab at nec.com>
---
Lianbo,
I can see that the spec file of RHEL's crash-trace-command points to
the tarball in the crash-extensions repository, we can remove trace.c
in the crash repository?
extensions/trace.c | 2592 -------------------------------------
extensions/trace.c.README | 7 +
2 files changed, 7 insertions(+), 2592 deletions(-)
delete mode 100644 extensions/trace.c
create mode 100644 extensions/trace.c.README
diff --git a/extensions/trace.c b/extensions/trace.c
deleted file mode 100644
index c33907f98b00..000000000000
--- a/extensions/trace.c
+++ /dev/null
@@ -1,2592 +0,0 @@
-/*
- * trace extension module for crash
- *
- * Copyright (C) 2009, 2010 FUJITSU LIMITED
- * Author: Lai Jiangshan <laijs at cn.fujitsu.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- */
-
-#define _GNU_SOURCE
-#include "defs.h"
-#include <stdio.h>
-#include <ctype.h>
-#include <setjmp.h>
-#include <stdlib.h>
-
-static int verbose = 0;
-
-static int nr_cpu_ids;
-
-/*
- * lockless ring_buffer and old non-lockless ring_buffer are both supported.
- */
-static int lockless_ring_buffer;
-static int per_cpu_buffer_sizes;
-/*
- * global and encapsulated current_trace are both supported
- */
-static int encapsulated_current_trace;
-/*
- * array_buffer (trace_buffer pre v5.6) is supported
- */
-static int array_buffer_available;
-/*
- * max_buffer is supported
- */
-static int max_buffer_available;
-/*
- * multiple trace instances are supported
- */
-static int multiple_instances_available;
-
-/*
- * buffer_page has "real_end"
- */
-static int buffer_page_real_end_available;
-
-#define koffset(struct, member) struct##_##member##_offset
-
-static int koffset(trace_array, current_trace);
-static int koffset(trace_array, array_buffer);
-static int koffset(trace_array, max_buffer);
-static int koffset(array_buffer, buffer);
-static int koffset(trace_array, buffer);
-static int koffset(tracer, name);
-
-static int koffset(trace_buffer, pages);
-static int koffset(trace_buffer, flags);
-static int koffset(trace_buffer, cpus);
-static int koffset(trace_buffer, buffers);
-
-static int koffset(ring_buffer_per_cpu, cpu);
-static int koffset(ring_buffer_per_cpu, pages);
-static int koffset(ring_buffer_per_cpu, nr_pages);
-static int koffset(ring_buffer_per_cpu, head_page);
-static int koffset(ring_buffer_per_cpu, tail_page);
-static int koffset(ring_buffer_per_cpu, commit_page);
-static int koffset(ring_buffer_per_cpu, reader_page);
-static int koffset(ring_buffer_per_cpu, overrun);
-static int koffset(ring_buffer_per_cpu, entries);
-
-static int koffset(buffer_page, read);
-static int koffset(buffer_page, list);
-static int koffset(buffer_page, page);
-static int koffset(buffer_page, real_end);
-
-static int koffset(list_head, next);
-
-static int koffset(ftrace_event_call, list);
-
-static int koffset(ftrace_event_field, link);
-static int koffset(ftrace_event_field, name);
-static int koffset(ftrace_event_field, type);
-static int koffset(ftrace_event_field, offset);
-static int koffset(ftrace_event_field, size);
-static int koffset(ftrace_event_field, is_signed);
-
-static int koffset(trace_array, name);
-
-static int koffset(POINTER_SYM, POINTER) = 0;
-
-struct ring_buffer_per_cpu {
- ulong kaddr;
-
- ulong head_page;
- ulong tail_page;
- ulong commit_page;
- ulong reader_page;
- ulong real_head_page;
-
- int head_page_index;
- unsigned long nr_pages;
- ulong *pages;
-
- ulong *linear_pages;
- int nr_linear_pages;
-
- ulong overrun;
- ulong entries;
-};
-
-static ulong global_trace;
-static ulong max_tr_trace;
-
-struct trace_instance {
- char name[NAME_MAX + 1];
- ulong array_buffer;
- ulong max_buffer;
- ulong trace_buffer;
- unsigned pages;
- struct ring_buffer_per_cpu *buffers;
-
- ulong max_tr_ring_buffer;
- unsigned max_tr_pages;
- struct ring_buffer_per_cpu *max_tr_buffers;
-};
-
-static ulong ftrace_trace_arrays;
-static struct trace_instance global_trace_instance;
-static struct trace_instance *trace_instances = NULL;
-static int instance_count;
-
-static ulong ftrace_events;
-static ulong current_trace;
-static const char *current_tracer_name;
-
-static void ftrace_destroy_event_types(void);
-static int ftrace_init_event_types(void);
-
-/* at = ((struct *)ptr)->member */
-#define read_value(at, ptr, struct, member) \
- do { \
- if (!readmem(ptr + koffset(struct, member), KVADDR, \
- &at, sizeof(at), #struct "'s " #member, \
- RETURN_ON_ERROR)) \
- goto out_fail;\
- } while (0)
-
-/* Remove the "const" qualifiers for ptr */
-#define free(ptr) free((void *)(ptr))
-
-static int write_and_check(int fd, void *data, size_t size)
-{
- size_t tot = 0;
- size_t w;
-
- do {
- w = write(fd, data, size - tot);
- tot += w;
-
- if (w <= 0)
- return -1;
- } while (tot != size);
-
- return 0;
-}
-
-#ifndef PATH_MAX
-#define PATH_MAX 4096
-#endif
-
-static int init_offsets(void)
-{
-#define check_offset(struct, member) do { \
- if (koffset(struct, member) < 0) { \
- fprintf(fp, "failed to init the offset, struct:"\
- #struct ", member:" #member); \
- fprintf(fp, "\n"); \
- return -1; \
- } \
- } while (0)
-
-#define init_offset(struct, member) do { \
- koffset(struct, member) = MEMBER_OFFSET(#struct, #member); \
- check_offset(struct, member); \
- } while (0)
-
-#define init_offset_alternative(struct, member, alt_struct, alt_member) do { \
- koffset(struct, member) = MEMBER_OFFSET(#alt_struct, #alt_member); \
- check_offset(struct, member); \
- } while (0)
-
- if (encapsulated_current_trace)
- init_offset(trace_array, current_trace);
-
- if (array_buffer_available) {
- if (MEMBER_EXISTS("trace_array", "array_buffer")) {
- init_offset(trace_array, array_buffer);
- init_offset(array_buffer, buffer);
- } else {
- init_offset_alternative(trace_array, array_buffer,
- trace_array, trace_buffer);
- init_offset_alternative(array_buffer, buffer,
- trace_buffer, buffer);
- }
-
- if (max_buffer_available)
- init_offset(trace_array, max_buffer);
- } else {
- init_offset(trace_array, buffer);
- }
- init_offset(tracer, name);
-
- if (MEMBER_EXISTS("ring_buffer_per_cpu", "nr_pages")) {
- per_cpu_buffer_sizes = 1;
- if (verbose)
- fprintf(fp, "per cpu buffer sizes\n");
- }
-
- if (machine_type("PPC64") && kernel_symbol_exists(".ring_buffer_read"))
- gdb_set_crash_scope(symbol_value(".ring_buffer_read"), ".ring_buffer_read");
- else if (kernel_symbol_exists("ring_buffer_read"))
- gdb_set_crash_scope(symbol_value("ring_buffer_read"), "ring_buffer_read");
-
- if (STREQ(MEMBER_TYPE_NAME("trace_buffer", "buffer"), "ring_buffer")) {
- if (!per_cpu_buffer_sizes)
- init_offset_alternative(trace_buffer, pages, ring_buffer, pages);
- init_offset_alternative(trace_buffer, flags, ring_buffer, flags);
- init_offset_alternative(trace_buffer, cpus, ring_buffer, cpus);
- init_offset_alternative(trace_buffer, buffers, ring_buffer, buffers);
- } else {
- if (!per_cpu_buffer_sizes)
- init_offset(trace_buffer, pages);
- init_offset(trace_buffer, flags);
- init_offset(trace_buffer, cpus);
- init_offset(trace_buffer, buffers);
- }
-
- if (MEMBER_SIZE("ring_buffer_per_cpu", "pages") == sizeof(ulong)) {
- lockless_ring_buffer = 1;
- if (verbose)
- fprintf(fp, "lockless\n");
- }
-
- if (per_cpu_buffer_sizes)
- init_offset(ring_buffer_per_cpu, nr_pages);
- init_offset(ring_buffer_per_cpu, cpu);
- init_offset(ring_buffer_per_cpu, pages);
- init_offset(ring_buffer_per_cpu, head_page);
- init_offset(ring_buffer_per_cpu, tail_page);
- init_offset(ring_buffer_per_cpu, commit_page);
- init_offset(ring_buffer_per_cpu, reader_page);
- init_offset(ring_buffer_per_cpu, overrun);
- init_offset(ring_buffer_per_cpu, entries);
-
- init_offset(buffer_page, read);
- init_offset(buffer_page, list);
- init_offset(buffer_page, page);
- init_offset(buffer_page, real_end);
-
- init_offset(list_head, next);
-
- koffset(ftrace_event_call, list) = MAX(MEMBER_OFFSET("ftrace_event_call", "list"),
- MEMBER_OFFSET("trace_event_call", "list"));
- if (koffset(ftrace_event_call, list) < 0) {
- fprintf(fp, "failed to init the offset, struct:[f]trace_event_call member:list)\n");
- return -1; \
- }
-
- init_offset(ftrace_event_field, link);
- init_offset(ftrace_event_field, name);
- init_offset(ftrace_event_field, type);
- init_offset(ftrace_event_field, offset);
- init_offset(ftrace_event_field, size);
- init_offset(ftrace_event_field, is_signed);
-
- if (MEMBER_EXISTS("trace_array", "name"))
- init_offset(trace_array, name);
-
- return 0;
-#undef init_offset
-}
-
-static void print_offsets(void)
-{
- if (!verbose)
- return;
-
-#define print_offset(struct, member) fprintf(fp, \
- "koffset(" #struct ", " #member ") = %d\n", koffset(struct, member))
-
- print_offset(trace_array, buffer);
- print_offset(tracer, name);
-
- print_offset(trace_buffer, pages);
- print_offset(trace_buffer, flags);
- print_offset(trace_buffer, cpus);
- print_offset(trace_buffer, buffers);
-
- print_offset(ring_buffer_per_cpu, cpu);
- print_offset(ring_buffer_per_cpu, pages);
- print_offset(ring_buffer_per_cpu, head_page);
- print_offset(ring_buffer_per_cpu, tail_page);
- print_offset(ring_buffer_per_cpu, commit_page);
- print_offset(ring_buffer_per_cpu, reader_page);
- print_offset(ring_buffer_per_cpu, overrun);
- print_offset(ring_buffer_per_cpu, entries);
-
- print_offset(buffer_page, read);
- print_offset(buffer_page, list);
- print_offset(buffer_page, page);
- print_offset(buffer_page, real_end);
-
- print_offset(list_head, next);
-
- print_offset(ftrace_event_call, list);
-
- print_offset(ftrace_event_field, link);
- print_offset(ftrace_event_field, name);
- print_offset(ftrace_event_field, type);
- print_offset(ftrace_event_field, offset);
- print_offset(ftrace_event_field, size);
- print_offset(ftrace_event_field, is_signed);
-#undef print_offset
-}
-
-static int buffer_page_has_data(ulong page)
-{
- uint end;
-
- if (!buffer_page_real_end_available)
- return 1;
-
- /* Only write pages with data in it */
- read_value(end, page, buffer_page, real_end);
- return end;
-out_fail:
- return 0;
-}
-
-static int ftrace_init_pages(struct ring_buffer_per_cpu *cpu_buffer,
- unsigned nr_pages)
-{
- unsigned j = 0, count = 0;
- ulong head, page;
- ulong real_head_page = cpu_buffer->head_page;
-
- cpu_buffer->pages = calloc(sizeof(ulong), nr_pages);
- if (cpu_buffer->pages == NULL)
- return -1;
-
- cpu_buffer->linear_pages = calloc(sizeof(ulong), nr_pages + 1);
- if (cpu_buffer->linear_pages == NULL) {
- return -1;
- }
-
- if (lockless_ring_buffer) {
- read_value(head, cpu_buffer->kaddr, ring_buffer_per_cpu, pages);
- cpu_buffer->pages[j++] = head - koffset(buffer_page, list);
- } else
- head = cpu_buffer->kaddr + koffset(ring_buffer_per_cpu, pages);
-
- page = head;
- for (;;) {
- read_value(page, page, list_head, next);
- if (page & 3) {
- /* lockless_ring_buffer */
- page &= ~3;
- real_head_page = page - koffset(buffer_page, list);
- }
-
- if (j == nr_pages)
- break;
-
- if (page == head) {
- error(INFO, "Num of pages is less than %d\n", nr_pages);
- goto out_fail;
- }
-
- cpu_buffer->pages[j++] = page - koffset(buffer_page, list);
- }
-
- if (page != head) {
- error(INFO, "Num of pages is larger than %d\n", nr_pages);
- goto out_fail;
- }
-
- /* find head page and head_page_index */
-
- cpu_buffer->real_head_page = real_head_page;
- cpu_buffer->head_page_index = -1;
-
- for (j = 0; j < nr_pages; j++) {
- if (cpu_buffer->pages[j] == real_head_page) {
- cpu_buffer->head_page_index = j;
- break;
- }
- }
-
- if (cpu_buffer->head_page_index == -1) {
- error(INFO, "error for resolve head_page_index\n");
- goto out_fail;
- }
-
- /* Setup linear pages */
-
- if (buffer_page_has_data(cpu_buffer->reader_page))
- cpu_buffer->linear_pages[count++] = cpu_buffer->reader_page;
-
- if (cpu_buffer->reader_page == cpu_buffer->commit_page)
- goto done;
-
- j = cpu_buffer->head_page_index;
- for (;;) {
- cpu_buffer->linear_pages[count++] = cpu_buffer->pages[j];
-
- if (cpu_buffer->pages[j] == cpu_buffer->commit_page)
- break;
-
- j++;
- if (j == nr_pages)
- j = 0;
-
- if (j == cpu_buffer->head_page_index) {
- /* cpu_buffer->commit_page may be corrupted */
- break;
- }
- }
-
-done:
- cpu_buffer->nr_linear_pages = count;
-
- return 0;
-
-out_fail:
- return -1;
-}
-
-static void ftrace_destroy_buffers(struct ring_buffer_per_cpu *buffers)
-{
- int i;
-
- for (i = 0; i < nr_cpu_ids; i++) {
- if (!buffers[i].kaddr)
- continue;
-
- free(buffers[i].pages);
- free(buffers[i].linear_pages);
- }
-}
-
-static int ftrace_init_buffers(struct ring_buffer_per_cpu *buffers,
- ulong trace_buffer, unsigned pages)
-{
- int i;
- ulong buffers_array;
-
- read_value(buffers_array, trace_buffer, trace_buffer, buffers);
-
- for (i = 0; i < nr_cpu_ids; i++) {
- if (!readmem(buffers_array + sizeof(ulong) * i, KVADDR,
- &buffers[i].kaddr, sizeof(ulong),
- "ring_buffer's cpu buffer", RETURN_ON_ERROR))
- goto out_fail;
-
- if (!buffers[i].kaddr)
- continue;
-
-#define buffer_read_value(member) read_value(buffers[i].member, \
- buffers[i].kaddr, ring_buffer_per_cpu, member)
-
- buffer_read_value(head_page);
- buffer_read_value(tail_page);
- buffer_read_value(commit_page);
- buffer_read_value(reader_page);
- buffer_read_value(overrun);
- buffer_read_value(entries);
- if (per_cpu_buffer_sizes) {
- if (MEMBER_SIZE("ring_buffer_per_cpu", "nr_pages") == sizeof(unsigned int)) {
- unsigned int tmp_nr_pages;
- read_value(tmp_nr_pages, buffers[i].kaddr, ring_buffer_per_cpu, nr_pages);
- buffers[i].nr_pages = (unsigned long) tmp_nr_pages;
- } else {
- buffer_read_value(nr_pages);
- }
- pages = buffers[i].nr_pages;
- } else
- buffers[i].nr_pages = pages;
-
-#undef buffer_read_value
-
- if (ftrace_init_pages(buffers + i, pages) < 0)
- goto out_fail;
-
- if (verbose) {
- fprintf(fp, "overrun=%lu\n", buffers[i].overrun);
- fprintf(fp, "entries=%lu\n", buffers[i].entries);
- }
- }
-
- return 0;
-
-out_fail:
- ftrace_destroy_buffers(buffers);
- return -1;
-}
-
-static int ftrace_init_trace(struct trace_instance *ti, ulong instance_addr)
-{
- if (array_buffer_available) {
- ti->array_buffer = instance_addr +
- koffset(trace_array, array_buffer);
- read_value(ti->trace_buffer, ti->array_buffer,
- array_buffer, buffer);
-
- if (max_buffer_available) {
- ti->max_buffer = instance_addr +
- koffset(trace_array, max_buffer);
- read_value(ti->max_tr_ring_buffer, ti->max_buffer,
- array_buffer, buffer);
- }
- } else {
- read_value(ti->trace_buffer, instance_addr, trace_array, buffer);
- read_value(ti->pages, ti->trace_buffer, trace_buffer, pages);
-
- read_value(ti->max_tr_ring_buffer, max_tr_trace, trace_array, buffer);
- if (ti->max_tr_ring_buffer)
- read_value(ti->max_tr_pages, ti->max_tr_ring_buffer, trace_buffer, pages);
- }
-
- ti->buffers = calloc(sizeof(*ti->buffers), nr_cpu_ids);
- if (ti->buffers == NULL)
- goto out_fail;
-
- if (ftrace_init_buffers(ti->buffers, ti->trace_buffer,
- ti->pages) < 0)
- goto out_fail;
-
- if (!ti->max_tr_ring_buffer)
- return 0;
-
- ti->max_tr_buffers = calloc(sizeof(*ti->max_tr_buffers), nr_cpu_ids);
- if (ti->max_tr_buffers == NULL)
- goto out_fail;
-
- if (ftrace_init_buffers(ti->max_tr_buffers, ti->max_tr_ring_buffer,
- ti->max_tr_pages) < 0)
- goto out_fail;
-
- return 0;
-
-out_fail:
- free(ti->max_tr_buffers);
- free(ti->buffers);
- return -1;
-}
-
-static void ftrace_destroy_all_instance_buffers()
-{
- int i;
-
- for (i = 0; i < instance_count; i++)
- {
- struct trace_instance *ti = &trace_instances[i];
-
- if (ti->max_tr_ring_buffer) {
- ftrace_destroy_buffers(ti->max_tr_buffers);
- free(ti->max_tr_buffers);
- }
-
- ftrace_destroy_buffers(ti->buffers);
- free(ti->buffers);
- }
-}
-
-static void ftrace_destroy_instances()
-{
- ftrace_destroy_all_instance_buffers();
- free(trace_instances);
-}
-
-static int ftrace_init_instances()
-{
- int i;
- struct trace_instance *ti;
- struct list_data list_data;
- struct list_data *ld = &list_data;
-
- if (!multiple_instances_available)
- return 0;
-
- BZERO(ld, sizeof(struct list_data));
- ld->start = ftrace_trace_arrays;
- ld->end = global_trace;
- ld->flags = LIST_ALLOCATE;
- instance_count = do_list(ld);
-
- /* The do_list count includes the list_head, which is not a
- * proper instance */
- instance_count--;
- if (instance_count <= 0)
- return 0;
-
- trace_instances = calloc(sizeof(struct trace_instance), instance_count);
-
- /* We start i at 1 to skip over the list_head and continue to the last
- * instance, which lies at index instance_count */
- for (i = 1; i <= instance_count; i++)
- {
- ulong instance_ptr;
- ulong name_addr;
- int ret;
-
- ti = &trace_instances[i-1];
- instance_ptr = ld->list_ptr[i];
- read_value(name_addr, instance_ptr, trace_array, name);
- if (!name_addr)
- {
- console("Instance name is NULL\n");
- }
- else if (!read_string(name_addr, ti->name, sizeof(ti->name)))
- {
- console("Failed to read instance name at address %p\n", (void*)name_addr);
- goto out_fail;
- }
-
- ret = ftrace_init_trace(ti, instance_ptr);
- if (ret < 0)
- goto out_fail;
- }
- FREEBUF(ld->list_ptr);
-
- return 0;
-
-out_fail:
- /* We've already freed the current instance's trace buffer info, so
- * we'll clear that out to avoid double freeing in
- * ftrace_destroy_instances() */
- BZERO(ti, sizeof(struct trace_instance));
- ftrace_destroy_instances();
-
- return -1;
-}
-
-static int ftrace_init_current_tracer(void)
-{
- ulong addr;
- char tmp[128];
-
- /* Get current tracer name */
- if (encapsulated_current_trace) {
- read_value(addr, global_trace, trace_array, current_trace);
- } else {
- read_value(addr, current_trace, POINTER_SYM, POINTER);
- }
-
- read_value(addr, addr, tracer, name);
- read_string(addr, tmp, 128);
-
- current_tracer_name = strdup(tmp);
- if (current_tracer_name == NULL)
- goto out_fail;
-
- return 0;
-
-out_fail:
- return -1;
-}
-
-static int ftrace_init(void)
-{
- struct syment *sym_global_trace;
- struct syment *sym_max_tr_trace;
- struct syment *sym_ftrace_events;
- struct syment *sym_current_trace;
- struct syment *sym_ftrace_trace_arrays;
-
- sym_global_trace = symbol_search("global_trace");
- sym_ftrace_events = symbol_search("ftrace_events");
- sym_ftrace_trace_arrays = symbol_search("ftrace_trace_arrays");
-
- if (sym_global_trace == NULL || sym_ftrace_events == NULL)
- return -1;
-
- global_trace = sym_global_trace->value;
- ftrace_events = sym_ftrace_events->value;
-
- if (sym_ftrace_trace_arrays)
- {
- multiple_instances_available = 1;
- ftrace_trace_arrays = sym_ftrace_trace_arrays->value;
- }
-
- if (MEMBER_EXISTS("buffer_page", "real_end"))
- buffer_page_real_end_available = 1;
-
- if (MEMBER_EXISTS("trace_array", "current_trace")) {
- encapsulated_current_trace = 1;
- } else {
- sym_current_trace = symbol_search("current_trace");
- if (sym_current_trace == NULL)
- return -1;
-
- current_trace = sym_current_trace->value;
- }
-
- if (MEMBER_EXISTS("trace_array", "array_buffer") ||
- MEMBER_EXISTS("trace_array", "trace_buffer")) {
- array_buffer_available = 1;
-
- if (MEMBER_EXISTS("trace_array", "max_buffer"))
- max_buffer_available = 1;
- } else {
- sym_max_tr_trace = symbol_search("max_tr");
- if (sym_max_tr_trace == NULL)
- return -1;
-
- max_tr_trace = sym_max_tr_trace->value;
- }
-
- if (!try_get_symbol_data("nr_cpu_ids", sizeof(int), &nr_cpu_ids))
- nr_cpu_ids = 1;
-
- if (init_offsets() < 0)
- return -1;
- print_offsets();
-
- if (ftrace_init_trace(&global_trace_instance, global_trace) < 0)
- goto out_0;
-
- if (ftrace_init_instances() < 0)
- goto out_1;
-
- if (ftrace_init_event_types() < 0)
- goto out_2;
-
- if (ftrace_init_current_tracer() < 0)
- goto out_3;
-
- return 0;
-
-out_3:
- ftrace_destroy_event_types();
-out_2:
- ftrace_destroy_instances();
-out_1:
- if (global_trace_instance.max_tr_ring_buffer) {
- ftrace_destroy_buffers(global_trace_instance.max_tr_buffers);
- free(global_trace_instance.max_tr_buffers);
- }
- ftrace_destroy_buffers(global_trace_instance.buffers);
- free(global_trace_instance.buffers);
-out_0:
- return -1;
-}
-
-static void ftrace_destroy(void)
-{
- free(current_tracer_name);
- ftrace_destroy_event_types();
-
- ftrace_destroy_instances();
-
- if (global_trace_instance.max_tr_ring_buffer) {
- ftrace_destroy_buffers(global_trace_instance.max_tr_buffers);
- free(global_trace_instance.max_tr_buffers);
- }
-
- ftrace_destroy_buffers(global_trace_instance.buffers);
- free(global_trace_instance.buffers);
-}
-
-static int ftrace_dump_page(int fd, ulong page, void *page_tmp)
-{
- ulong raw_page;
-
- read_value(raw_page, page, buffer_page, page);
-
- if (!readmem(raw_page, KVADDR, page_tmp, PAGESIZE(), "get page context",
- RETURN_ON_ERROR))
- goto out_fail;
-
- if (write_and_check(fd, page_tmp, PAGESIZE()))
- return -1;
-
- return 0;
-
-out_fail:
- return -1;
-}
-
-static
-void ftrace_dump_buffer(int fd, struct ring_buffer_per_cpu *cpu_buffer,
- unsigned pages, void *page_tmp)
-{
- int i;
-
- for (i = 0; i < cpu_buffer->nr_linear_pages; i++) {
- if (ftrace_dump_page(fd, cpu_buffer->linear_pages[i],
- page_tmp) < 0)
- break;
- }
-}
-
-static int try_mkdir(const char *pathname, mode_t mode)
-{
- int ret;
-
- ret = mkdir(pathname, mode);
- if (ret < 0) {
- if (errno == EEXIST)
- return 0;
-
- error(INFO, "mkdir failed\n");
- return -1;
- }
-
- return 0;
-}
-
-static int ftrace_dump_buffers(const char *per_cpu_path,
- struct trace_instance *ti)
-{
- int i;
- void *page_tmp;
- char path[PATH_MAX];
- int fd;
-
- page_tmp = malloc(PAGESIZE());
- if (page_tmp == NULL)
- return -1;
-
- for (i = 0; i < nr_cpu_ids; i++) {
- struct ring_buffer_per_cpu *cpu_buffer = &ti->buffers[i];
-
- if (!cpu_buffer->kaddr)
- continue;
-
- snprintf(path, sizeof(path), "%s/cpu%d", per_cpu_path, i);
- if (try_mkdir(path, 0755) < 0)
- goto out_fail;
-
- snprintf(path, sizeof(path), "%s/cpu%d/trace_pipe_raw",
- per_cpu_path, i);
- fd = open(path, O_WRONLY | O_CREAT, 0644);
- if (fd < 0)
- goto out_fail;
-
- ftrace_dump_buffer(fd, cpu_buffer, ti->pages, page_tmp);
- close(fd);
- }
-
- free(page_tmp);
- return 0;
-
-out_fail:
- free(page_tmp);
- return -1;
-}
-
-#define MAX_CACHE_ID 256
-
-struct ftrace_field {
- const char *name;
- const char *type;
- int offset;
- int size;
- int is_signed;
-};
-
-struct event_type {
- struct event_type *next;
- const char *system;
- const char *name;
- int plugin;
- const char *print_fmt;
- int id;
- int nfields;
- struct ftrace_field *fields;
-};
-
-static struct event_type *event_type_cache[MAX_CACHE_ID];
-static struct event_type **event_types;
-static int nr_event_types;
-
-static struct ftrace_field *ftrace_common_fields;
-static int ftrace_common_fields_count;
-
-static int syscall_get_enter_fields(ulong call, ulong *fields)
-{
- static int inited;
- static int data_offset;
- static int enter_fields_offset;
-
- ulong metadata;
-
- if (inited)
- goto work;
-
- inited = 1;
- data_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "data"),
- MEMBER_OFFSET("trace_event_call", "data"));
- if (data_offset < 0) {
- /*
- * rhel-7.6 moved the .data member into an anonymous union.
- */
- if (MEMBER_EXISTS("ftrace_event_call", "rh_data") &&
- MEMBER_EXISTS("ftrace_event_data", "data")) {
- data_offset = MEMBER_OFFSET("ftrace_event_call", "rh_data") +
- MEMBER_OFFSET("ftrace_event_data", "data");
- inited = 2;
- } else
- return -1;
- }
-
- enter_fields_offset = MEMBER_OFFSET("syscall_metadata", "enter_fields");
- if (enter_fields_offset < 0)
- return -1;
-
-work:
- if (data_offset < 0 || enter_fields_offset < 0)
- return -1;
-
- if (!readmem(call + data_offset, KVADDR, &metadata, sizeof(metadata),
- "read ftrace_event_call data", RETURN_ON_ERROR))
- return -1;
-
- if (inited == 2) {
- if (!readmem(metadata, KVADDR, &metadata, sizeof(metadata),
- "read ftrace_event_call data (indirect rh_data)", RETURN_ON_ERROR))
- return -1;
- }
-
- *fields = metadata + enter_fields_offset;
- return 0;
-}
-
-static int syscall_get_exit_fields_old(ulong call, ulong *fields)
-{
- static int inited;
- static int data_offset;
- static int exit_fields_offset;
-
- ulong metadata;
-
- if (inited)
- goto work;
-
- inited = 1;
- data_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "data"),
- MEMBER_OFFSET("trace_event_call", "data"));
- if (data_offset < 0)
- return -1;
-
- exit_fields_offset = MEMBER_OFFSET("syscall_metadata", "exit_fields");
- if (exit_fields_offset < 0)
- return -1;
-
-work:
- if (data_offset < 0 || exit_fields_offset < 0)
- return -1;
-
- if (!readmem(call + data_offset, KVADDR, &metadata, sizeof(metadata),
- "read ftrace_event_call data", RETURN_ON_ERROR))
- return -1;
-
- *fields = metadata + exit_fields_offset;
- return 0;
-}
-
-static int syscall_get_exit_fields(ulong call, ulong *fields)
-{
- static int inited;
- static ulong syscall_exit_fields_value;
-
- if (!inited) {
- struct syment *sp;
-
- if (!(sp = symbol_search("syscall_exit_fields"))) {
- inited = -1;
- } else {
- syscall_exit_fields_value = sp->value;
- inited = 1;
- }
- }
-
- if (inited == -1)
- return syscall_get_exit_fields_old(call, fields);
-
- *fields = syscall_exit_fields_value;
-
- return 0;
-}
-
-static
-int ftrace_get_event_type_fields(ulong call, ulong *fields)
-{
- static int inited;
- static int fields_offset;
- static int class_offset;
- static int get_fields_offset;
- static ulong syscall_get_enter_fields_value;
- static ulong syscall_get_exit_fields_value;
-
- struct syment *sp;
- ulong class, get_fields;
-
- if (inited)
- goto work;
-
- inited = 1;
- fields_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "fields"),
- MEMBER_OFFSET("trace_event_call", "fields"));
-
- class_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "class"),
- MEMBER_OFFSET("trace_event_call", "class"));
- if (class_offset < 0)
- goto work;
-
- inited = 2;
- fields_offset = MAX(MEMBER_OFFSET("ftrace_event_class", "fields"),
- MEMBER_OFFSET("trace_event_class", "fields"));
- if (fields_offset < 0)
- return -1;
-
- get_fields_offset = MAX(MEMBER_OFFSET("ftrace_event_class", "get_fields"),
- MEMBER_OFFSET("trace_event_class", "get_fields"));
- if ((sp = symbol_search("syscall_get_enter_fields")) != NULL)
- syscall_get_enter_fields_value = sp->value;
- if ((sp = symbol_search("syscall_get_exit_fields")) != NULL)
- syscall_get_exit_fields_value = sp->value;
-
-work:
- if (fields_offset < 0)
- return -1;
-
- if (inited == 1) {
- *fields = call + fields_offset;
- return 0;
- }
-
- if (!readmem(call + class_offset, KVADDR, &class, sizeof(class),
- "read ftrace_event_call class", RETURN_ON_ERROR))
- return -1;
-
- if (!readmem(class + get_fields_offset, KVADDR, &get_fields,
- sizeof(get_fields), "read ftrace_event_call get_fields",
- RETURN_ON_ERROR))
- return -1;
-
- if (!get_fields) {
- *fields = class + fields_offset;
- return 0;
- }
-
- if (get_fields == syscall_get_enter_fields_value)
- return syscall_get_enter_fields(call, fields);
-
- if (get_fields == syscall_get_exit_fields_value)
- return syscall_get_exit_fields(call, fields);
-
- fprintf(fp, "Unkown get_fields function\n");
- return -1;
-}
-
-static int ftrace_init_event_fields(ulong fields_head, int *pnfields,
- struct ftrace_field **pfields)
-{
- ulong pos;
-
- int nfields = 0, max_fields = 16;
- struct ftrace_field *fields = NULL;
-
- read_value(pos, fields_head, list_head, next);
-
- if (pos == 0) {
- if (verbose)
- fprintf(fp, "no field, head: %lu\n", fields_head);
- return 0;
- }
-
- fields = malloc(sizeof(*fields) * max_fields);
- if (fields == NULL)
- return -1;
-
- while (pos != fields_head) {
- ulong field;
- ulong name_addr, type_addr;
- char field_name[128], field_type[128];
- int offset, size, is_signed;
-
- field = pos - koffset(ftrace_event_field, link);
-
- /* Read a field from the core */
- read_value(name_addr, field, ftrace_event_field, name);
- read_value(type_addr, field, ftrace_event_field, type);
- read_value(offset, field, ftrace_event_field, offset);
- read_value(size, field, ftrace_event_field, size);
- read_value(is_signed, field, ftrace_event_field, is_signed);
-
- if (!read_string(name_addr, field_name, 128))
- goto out_fail;
- if (!read_string(type_addr, field_type, 128))
- goto out_fail;
-
- /* Enlarge fields array when need */
- if (nfields >= max_fields) {
- void *tmp;
-
- max_fields = nfields * 2;
- tmp = realloc(fields, sizeof(*fields) * max_fields);
- if (tmp == NULL)
- goto out_fail;
-
- fields = tmp;
- }
-
- /* Set up and Add a field */
- fields[nfields].offset = offset;
- fields[nfields].size = size;
- fields[nfields].is_signed = is_signed;
-
- fields[nfields].name = strdup(field_name);
- if (fields[nfields].name == NULL)
- goto out_fail;
-
- fields[nfields].type = strdup(field_type);
- if (fields[nfields].type == NULL) {
- free(fields[nfields].name);
- goto out_fail;
- }
-
- nfields++;
-
- /* Advance to the next field */
- read_value(pos, pos, list_head, next);
- }
-
- *pnfields = nfields;
- *pfields = fields;
-
- return 0;
-
-out_fail:
- for (nfields--; nfields >= 0; nfields--) {
- free(fields[nfields].name);
- free(fields[nfields].type);
- }
-
- free(fields);
- return -1;
-}
-
-static int ftrace_init_event_type(ulong call, struct event_type *aevent_type)
-{
- ulong fields_head = 0;
-
- if (ftrace_get_event_type_fields(call, &fields_head) < 0)
- return -1;
-
- return ftrace_init_event_fields(fields_head, &aevent_type->nfields,
- &aevent_type->fields);
-}
-
-static int ftrace_init_common_fields(void)
-{
- ulong ftrace_common_fields_head;
- struct syment *sp;
-
- sp = symbol_search("ftrace_common_fields");
- if (!sp)
- return 0;
-
- ftrace_common_fields_head = sp->value;
-
- return ftrace_init_event_fields(ftrace_common_fields_head,
- &ftrace_common_fields_count, &ftrace_common_fields);
-}
-
-static void ftrace_destroy_event_types(void)
-{
- int i, j;
-
- for (i = 0; i < nr_event_types; i++) {
- for (j = 0; j < event_types[i]->nfields; j++) {
- free(event_types[i]->fields[j].name);
- free(event_types[i]->fields[j].type);
- }
-
- free(event_types[i]->fields);
- free(event_types[i]->system);
- free(event_types[i]->name);
- free(event_types[i]->print_fmt);
- free(event_types[i]);
- }
-
- free(event_types);
- free(ftrace_common_fields);
-}
-
-static
-int ftrace_get_event_type_name(ulong call, char *name, int len)
-{
- static int inited;
- static int name_offset;
- static int flags_offset;
- static int tp_name_offset;
- static long tracepoint_flag;
-
- uint flags;
- ulong name_addr;
-
- if (inited)
- goto work;
-
- name_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "tp"),
- MEMBER_OFFSET("trace_event_call", "tp"));
- if (name_offset >= 0) {
- flags_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "flags"),
- MEMBER_OFFSET("trace_event_call", "flags"));
- if (flags_offset < 0)
- return -1;
-
- tp_name_offset = MEMBER_OFFSET("tracepoint", "name");
- if (tp_name_offset < 0)
- return -1;
-
- if (!enumerator_value("TRACE_EVENT_FL_TRACEPOINT", &tracepoint_flag))
- return -1;
-
- inited = 2;
- } else {
- name_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "name"),
- MEMBER_OFFSET("trace_event_call", "name"));
- inited = 1;
- }
-
-work:
- if (name_offset < 0)
- return -1;
-
- if (!readmem(call + name_offset, KVADDR, &name_addr, sizeof(name_addr),
- "read ftrace_event_call name_addr", RETURN_ON_ERROR))
- return -1;
-
- if (inited == 2) {
- if (!readmem(call + flags_offset, KVADDR, &flags,
- sizeof(flags), "read ftrace_event_call flags",
- RETURN_ON_ERROR))
- return -1;
-
- if (flags & (uint)tracepoint_flag) {
- if (!readmem(name_addr + tp_name_offset, KVADDR,
- &name_addr, sizeof(name_addr),
- "read tracepoint name", RETURN_ON_ERROR))
- return -1;
- }
-
- }
-
- if (!read_string(name_addr, name, len))
- return -1;
-
- return 0;
-}
-
-static
-int ftrace_get_event_type_system(ulong call, char *system, int len)
-{
- static int inited;
- static int sys_offset;
- static int class_offset;
-
- ulong ptr = call;
- ulong sys_addr;
-
- if (inited)
- goto work;
-
- inited = 1;
- sys_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "system"),
- MEMBER_OFFSET("trace_event_call", "system"));
-
- if (sys_offset >= 0)
- goto work;
-
- class_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "class"),
- MEMBER_OFFSET("trace_event_call", "class"));
- if (class_offset < 0)
- return -1;
-
- sys_offset = MAX(MEMBER_OFFSET("ftrace_event_class", "system"),
- MEMBER_OFFSET("trace_event_class", "system"));
- inited = 2;
-
-work:
- if (sys_offset < 0)
- return -1;
-
- if (inited == 2 && !readmem(call + class_offset, KVADDR, &ptr,
- sizeof(ptr), "read ftrace_event_call class_addr",
- RETURN_ON_ERROR))
- return -1;
-
- if (!readmem(ptr + sys_offset, KVADDR, &sys_addr, sizeof(sys_addr),
- "read ftrace_event_call sys_addr", RETURN_ON_ERROR))
- return -1;
-
- if (!read_string(sys_addr, system, len))
- return -1;
-
- return 0;
-}
-
-static int read_long_string(ulong kvaddr, char **buf)
-{
- char strbuf[MIN_PAGE_SIZE], *ret_buf = NULL;
- ulong kp;
- int cnt1, cnt2, size;
-
-again:
- kp = kvaddr;
- size = 0;
-
- for (;;) {
- cnt1 = MIN_PAGE_SIZE - (kp & (MIN_PAGE_SIZE-1));
-
- if (!readmem(kp, KVADDR, strbuf, cnt1,
- "readstring characters", QUIET|RETURN_ON_ERROR))
- return -1;
-
- cnt2 = strnlen(strbuf, cnt1);
- if (ret_buf)
- memcpy(ret_buf + size, strbuf, cnt2);
- kp += cnt2;
- size += cnt2;
-
- if (cnt2 < cnt1) {
- if (ret_buf) {
- break;
- } else {
- ret_buf = malloc(size + 1);
- if (!ret_buf)
- return -1;
- goto again;
- }
- }
- }
-
- ret_buf[size] = '\0';
- *buf = ret_buf;
- return size;
-}
-
-static
-int ftrace_get_event_type_print_fmt(ulong call, char **print_fmt)
-{
- static int inited;
- static int fmt_offset;
-
- ulong fmt_addr;
-
- if (!inited) {
- inited = 1;
- fmt_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "print_fmt"),
- MEMBER_OFFSET("trace_event_call", "print_fmt"));
- }
-
- if (fmt_offset < 0) {
- *print_fmt = strdup("Unknown print_fmt");
- return 0;
- }
-
- if (!readmem(call + fmt_offset, KVADDR, &fmt_addr, sizeof(fmt_addr),
- "read ftrace_event_call fmt_addr", RETURN_ON_ERROR))
- return -1;
-
- return read_long_string(fmt_addr, print_fmt);
-}
-
-static
-int ftrace_get_event_type_id(ulong call, int *id)
-{
- static int inited;
- static int id_offset;
-
- if (!inited) {
- inited = 1;
- id_offset = MAX(MEMBER_OFFSET("ftrace_event_call", "id"),
- MEMBER_OFFSET("trace_event_call", "id"));
-
- if (id_offset < 0) {
- /* id = call->event.type */
- int f1 = MAX(MEMBER_OFFSET("ftrace_event_call", "event"),
- MEMBER_OFFSET("trace_event_call", "event"));
- int f2 = MEMBER_OFFSET("trace_event", "type");
-
- if (f1 >= 0 && f2 >= 0)
- id_offset = f1 + f2;
- }
- }
-
- if (id_offset < 0)
- return -1;
-
- if (!readmem(call + id_offset, KVADDR, id, sizeof(*id),
- "read ftrace_event_call id", RETURN_ON_ERROR))
- return -1;
-
- return 0;
-}
-
-static int ftrace_init_event_types(void)
-{
- ulong event;
- struct event_type *aevent_type;
- int max_types = 128;
-
- event_types = malloc(sizeof(*event_types) * max_types);
- if (event_types == NULL)
- return -1;
-
- read_value(event, ftrace_events, list_head, next);
- while (event != ftrace_events) {
- ulong call;
- char name[128], system[128], *print_fmt;
- int id;
-
- call = event - koffset(ftrace_event_call, list);
-
- /* Read a event type from the core */
- if (ftrace_get_event_type_id(call, &id) < 0 ||
- ftrace_get_event_type_name(call, name, 128) < 0 ||
- ftrace_get_event_type_system(call, system, 128) < 0 ||
- ftrace_get_event_type_print_fmt(call, &print_fmt) < 0)
- goto out_fail;
-
- /* Enlarge event types array when need */
- if (nr_event_types >= max_types) {
- void *tmp;
-
- max_types = 2 * nr_event_types;
- tmp = realloc(event_types,
- sizeof(*event_types) * max_types);
- if (tmp == NULL) {
- free(print_fmt);
- goto out_fail;
- }
-
- event_types = tmp;
- }
-
- /* Create a event type */
- aevent_type = malloc(sizeof(*aevent_type));
- if (aevent_type == NULL) {
- free(print_fmt);
- goto out_fail;
- }
-
- aevent_type->system = strdup(system);
- aevent_type->name = strdup(name);
- aevent_type->print_fmt = print_fmt;
- aevent_type->id = id;
- aevent_type->nfields = 0;
- aevent_type->fields = NULL;
-
- if (aevent_type->system == NULL || aevent_type->name == NULL)
- goto out_fail_free_aevent_type;
-
- if (ftrace_init_event_type(call, aevent_type) < 0)
- goto out_fail_free_aevent_type;
-
- if (!strcmp("ftrace", aevent_type->system))
- aevent_type->plugin = 1;
- else
- aevent_type->plugin = 0;
-
- /* Add a event type */
- event_types[nr_event_types++] = aevent_type;
- if ((unsigned)id < MAX_CACHE_ID)
- event_type_cache[id] = aevent_type;
-
- /* Advance to the next event type */
- read_value(event, event, list_head, next);
- }
-
- if (ftrace_init_common_fields() < 0)
- goto out_fail;
-
- return 0;
-
-out_fail_free_aevent_type:
- free(aevent_type->system);
- free(aevent_type->name);
- free(aevent_type->print_fmt);
- free(aevent_type);
-out_fail:
- ftrace_destroy_event_types();
- return -1;
-}
-
-#define default_common_field_count 5
-
-static int ftrace_dump_event_type(struct event_type *t, const char *path)
-{
- char format_path[PATH_MAX];
- FILE *out;
- int i, nfields;
- struct ftrace_field *fields;
- int printed_common_field = 0;
-
- snprintf(format_path, sizeof(format_path), "%s/format", path);
- out = fopen(format_path, "w");
- if (out == NULL)
- return -1;
-
- fprintf(out, "name: %s\n", t->name);
- fprintf(out, "ID: %d\n", t->id);
- fprintf(out, "format:\n");
-
- if (ftrace_common_fields_count) {
- nfields = ftrace_common_fields_count;
- fields = ftrace_common_fields;
- } else {
- nfields = default_common_field_count;
- fields = &t->fields[t->nfields - nfields];
- }
-
-again:
- for (i = nfields - 1; i >= 0; i--) {
- /*
- * Smartly shows the array type(except dynamic array).
- * Normal:
- * field:TYPE VAR
- * If TYPE := TYPE[LEN], it is shown:
- * field:TYPE VAR[LEN]
- */
- struct ftrace_field *field = &fields[i];
- const char *array_descriptor = strchr(field->type, '[');
-
- if (!strncmp(field->type, "__data_loc", 10))
- array_descriptor = NULL;
-
- if (!array_descriptor) {
- fprintf(out, "\tfield:%s %s;\toffset:%u;"
- "\tsize:%u;\tsigned:%d;\n",
- field->type, field->name, field->offset,
- field->size, !!field->is_signed);
- } else {
- fprintf(out, "\tfield:%.*s %s%s;\toffset:%u;"
- "\tsize:%u;\tsigned:%d;\n",
- (int)(array_descriptor - field->type),
- field->type, field->name,
- array_descriptor, field->offset,
- field->size, !!field->is_signed);
- }
- }
-
- if (!printed_common_field) {
- fprintf(out, "\n");
-
- if (ftrace_common_fields_count)
- nfields = t->nfields;
- else
- nfields = t->nfields - default_common_field_count;
- fields = t->fields;
-
- printed_common_field = 1;
- goto again;
- }
-
- fprintf(out, "\nprint fmt: %s\n", t->print_fmt);
-
- fclose(out);
-
- return 0;
-}
-
-static int ftrace_dump_event_types(const char *events_path)
-{
- int i;
-
- for (i = 0; i < nr_event_types; i++) {
- char path[PATH_MAX];
- struct event_type *t = event_types[i];
-
- snprintf(path, sizeof(path), "%s/%s", events_path, t->system);
- if (try_mkdir(path, 0755) < 0)
- return -1;
-
- snprintf(path, sizeof(path), "%s/%s/%s", events_path,
- t->system, t->name);
- if (try_mkdir(path, 0755) < 0)
- return -1;
-
- if (ftrace_dump_event_type(t, path) < 0)
- return -1;
- }
-
- return 0;
-}
-
-static void show_basic_info(void)
-{
- fprintf(fp, "current tracer is %s\n", current_tracer_name);
-}
-
-static int dump_saved_cmdlines(const char *dump_tracing_dir)
-{
- char path[PATH_MAX];
- FILE *out;
- int i;
- struct task_context *tc;
-
- snprintf(path, sizeof(path), "%s/saved_cmdlines", dump_tracing_dir);
- out = fopen(path, "w");
- if (out == NULL)
- return -1;
-
- tc = FIRST_CONTEXT();
- for (i = 0; i < RUNNING_TASKS(); i++)
- fprintf(out, "%d %s\n", (int)tc[i].pid, tc[i].comm);
-
- fclose(out);
- return 0;
-}
-
-static int dump_kallsyms(const char *dump_tracing_dir)
-{
- char path[PATH_MAX];
- FILE *out;
- int i;
- struct syment *sp;
-
- snprintf(path, sizeof(path), "%s/kallsyms", dump_tracing_dir);
- out = fopen(path, "w");
- if (out == NULL)
- return -1;
-
- for (sp = st->symtable; sp < st->symend; sp++)
- fprintf(out, "%lx %c %s\n", sp->value, sp->type, sp->name);
-
- for (i = 0; i < st->mods_installed; i++) {
- struct load_module *lm = &st->load_modules[i];
-
- for (sp = lm->mod_symtable; sp <= lm->mod_symend; sp++) {
- if (!strncmp(sp->name, "_MODULE_", strlen("_MODULE_")))
- continue;
-
- fprintf(out, "%lx %c %s\t[%s]\n", sp->value, sp->type,
- sp->name, lm->mod_name);
- }
- }
-
- fclose(out);
- return 0;
-}
-
-static int trace_cmd_data_output(int fd);
-
-#define FTRACE_DUMP_SYMBOLS (1 << 0)
-#define FTRACE_DUMP_META_DATA (1 << 1)
-
-static int populate_ftrace_dir_tree(struct trace_instance *ti,
- char *root, uint flags)
-{
- char path[PATH_MAX];
- int ret;
-
- ret = mkdir(root, 0755);
- if (ret < 0) {
- if (errno == EEXIST)
- error(INFO, "mkdir: %s exists\n", root);
- return FALSE;
- }
-
- snprintf(path, sizeof(path), "%s/per_cpu", root);
- if (try_mkdir(path, 0755) < 0)
- return FALSE;
-
- if (ftrace_dump_buffers(path, ti) < 0)
- return FALSE;
-
- if (flags & FTRACE_DUMP_META_DATA) {
- /* Dump event types */
- snprintf(path, sizeof(path), "%s/events", root);
- if (try_mkdir(path, 0755) < 0)
- return FALSE;
-
- if (ftrace_dump_event_types(path) < 0)
- return FALSE;
-
- /* Dump pids with corresponding cmdlines */
- if (dump_saved_cmdlines(root) < 0)
- return FALSE;
- }
-
- if (flags & FTRACE_DUMP_SYMBOLS) {
- /* Dump all symbols of the kernel */
- dump_kallsyms(root);
- }
-
- return TRUE;
-}
-
-static void ftrace_dump(int argc, char *argv[])
-{
- int c;
- int i;
- uint flags = 0;
- char *dump_tracing_dir;
- char instance_path[PATH_MAX];
-
- while ((c = getopt(argc, argv, "smt")) != EOF) {
- switch(c)
- {
- case 's':
- flags |= FTRACE_DUMP_SYMBOLS;
- break;
- case 'm':
- flags |= FTRACE_DUMP_META_DATA;
- break;
- case 't':
- if (flags & FTRACE_DUMP_SYMBOLS ||
- flags & FTRACE_DUMP_META_DATA ||
- argc - optind > 1)
- cmd_usage(pc->curcmd, SYNOPSIS);
- else {
- char *trace_dat = "trace.dat";
- int fd;
-
- if (argc - optind == 0)
- trace_dat = "trace.dat";
- else if (argc - optind == 1)
- trace_dat = argv[optind];
- fd = open(trace_dat, O_WRONLY | O_CREAT
- | O_TRUNC, 0644);
- trace_cmd_data_output(fd);
- close(fd);
- }
- return;
- default:
- cmd_usage(pc->curcmd, SYNOPSIS);
- return;
- }
- }
-
- if (argc - optind == 0) {
- dump_tracing_dir = "dump_tracing_dir";
- } else if (argc - optind == 1) {
- dump_tracing_dir = argv[optind];
- } else {
- cmd_usage(pc->curcmd, SYNOPSIS);
- return;
- }
-
- if (!populate_ftrace_dir_tree(&global_trace_instance, dump_tracing_dir, flags))
- return;
-
- if (!multiple_instances_available || instance_count == 0)
- return;
-
- /* Create an instances directory, and dump instance data in there */
- snprintf(instance_path, sizeof(instance_path),
- "%s/instances", dump_tracing_dir);
- if (try_mkdir(instance_path, 0755) < 0)
- return;
-
- /* Don't care about the flags anymore */
- flags = 0;
-
- for (i = 0; i < instance_count; i++)
- {
- struct trace_instance *ti = &trace_instances[i];
-
- snprintf(instance_path, sizeof(instance_path),
- "%s/instances/%s", dump_tracing_dir,
- ti->name);
-
- if (populate_ftrace_dir_tree(ti, instance_path, flags) < 0)
- break;
- }
-
- return;
-}
-
-static void ftrace_show(int argc, char *argv[])
-{
- char buf[4096];
- char tmp[] = "/tmp/crash.trace_dat.XXXXXX";
- char *trace_cmd = "trace-cmd", *env_trace_cmd = getenv("TRACE_CMD");
- int fd;
- FILE *file;
- size_t ret;
- size_t nitems __attribute__ ((__unused__));
-
- /* check trace-cmd */
- if (env_trace_cmd)
- trace_cmd = env_trace_cmd;
- buf[0] = 0;
- if ((file = popen(trace_cmd, "r"))) {
- ret = fread(buf, 1, sizeof(buf), file);
- buf[ret] = 0;
- pclose(file);
- }
- if (!strstr(buf, "trace-cmd version")) {
- if (env_trace_cmd)
- fprintf(fp, "Invalid environment TRACE_CMD: %s\n",
- env_trace_cmd);
- else
- fprintf(fp, "\"trace show\" requires trace-cmd.\n"
- "please set the environment TRACE_CMD "
- "if you installed it in a special path\n"
- );
- return;
- }
-
- /* dump trace.dat to the temp file */
- fd = mkstemp(tmp);
- if (fd < 0)
- return;
- if (trace_cmd_data_output(fd) < 0)
- goto out;
-
- /* splice the output of trace-cmd to user */
- snprintf(buf, sizeof(buf), "%s report %s", trace_cmd, tmp);
- if (!(file = popen(buf, "r")))
- goto out;
- for (;;) {
- ret = fread(buf, 1, sizeof(buf), file);
- if (ret == 0)
- break;
- nitems = fwrite(buf, 1, ret, fp);
- }
- pclose(file);
-out:
- close(fd);
- unlink(tmp);
- return;
-}
-
-static void cmd_ftrace(void)
-{
- if (argcnt == 1)
- show_basic_info();
- else if (!strcmp(args[1], "dump"))
- ftrace_dump(argcnt - 1, args + 1);
- else if (!strcmp(args[1], "show"))
- ftrace_show(argcnt - 1, args + 1);
- else if (!strcmp(args[1], "report"))
- ftrace_show(argcnt - 1, args + 1);
- else
- cmd_usage(pc->curcmd, SYNOPSIS);
-}
-
-static char *help_ftrace[] = {
-"trace",
-"show or dump the tracing info",
-"[ <show [-c <cpulist>] [-f [no]<flagname>]> | <dump [-sm] <dest-dir>> ] | <dump -t <trace.dat> ]",
-"trace",
-" shows the current tracer and other informations.",
-"",
-"trace show",
-" shows all events with readability text(sorted by timestamp)",
-"",
-"trace report",
-" the same as \"trace show\"",
-"",
-"trace dump [-sm] <dest-dir>",
-" dump ring_buffers to dest-dir. Then you can parse it",
-" by other tracing tools. The dirs and files are generated",
-" the same as debugfs/tracing.",
-" -m: also dump metadata of ftrace.",
-" -s: also dump symbols of the kernel.",
-"trace dump -t [output-file-name]",
-" dump ring_buffers and all meta data to a file that can",
-" be parsed by trace-cmd. Default output file name is \"trace.dat\".",
-NULL
-};
-
-static struct command_table_entry command_table[] = {
- { "trace", cmd_ftrace, help_ftrace, 0 },
- { NULL, 0, 0, 0 }
-};
-
-static int ftrace_initialized;
-
-void __attribute__((constructor))
-trace_init(void)
-{
- if (ftrace_init() < 0)
- return;
-
- ftrace_initialized = 1;
- register_extension(command_table);
-}
-
-void __attribute__((destructor))
-trace_fini(void)
-{
- if (ftrace_initialized)
- ftrace_destroy();
-}
-
-#define TRACE_CMD_FILE_VERSION_STRING "6"
-
-static inline int host_bigendian(void)
-{
- unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
- unsigned int *ptr;
-
- ptr = (unsigned int *)str;
- return *ptr == 0x01020304;
-}
-
-static char *tmp_file_buf;
-static unsigned long long tmp_file_pos;
-static unsigned long long tmp_file_size;
-static int tmp_file_error;
-
-static int init_tmp_file(void)
-{
- tmp_file_buf = malloc(4096);
- if (tmp_file_buf == NULL)
- return -1;
-
- tmp_file_pos = 0;
- tmp_file_size = 4096;
- tmp_file_error = 0;
-
- return 0;
-}
-
-static void destory_tmp_file(void)
-{
- free(tmp_file_buf);
-}
-
-#define tmp_fprintf(fmt...) \
-do { \
- char *__buf = tmp_file_buf; \
- unsigned long long __pos; \
- \
- if (tmp_file_error) \
- break; \
- __pos = tmp_file_pos; \
- __pos += snprintf(__buf + __pos, tmp_file_size - __pos, fmt); \
- if (__pos >= tmp_file_size) { \
- tmp_file_size = __pos + tmp_file_size; \
- __buf = realloc(__buf, tmp_file_size); \
- if (!__buf) { \
- tmp_file_error = 1; \
- break; \
- } \
- tmp_file_buf = __buf; \
- __pos = tmp_file_pos; \
- __pos += snprintf(__buf + __pos, tmp_file_size - __pos, fmt);\
- } \
- tmp_file_pos = __pos; \
-} while (0)
-
-static int tmp_file_record_size4(int fd)
-{
- unsigned int size = tmp_file_pos;
-
- if (tmp_file_error)
- return -1;
- if (write_and_check(fd, &size, 4))
- return -1;
- return 0;
-}
-
-static int tmp_file_record_size8(int fd)
-{
- if (tmp_file_error)
- return -1;
- if (write_and_check(fd, &tmp_file_pos, 8))
- return -1;
- return 0;
-}
-
-static int tmp_file_flush(int fd)
-{
- if (tmp_file_error)
- return -1;
- if (write_and_check(fd, tmp_file_buf, tmp_file_pos))
- return -1;
- tmp_file_pos = 0;
- return 0;
-}
-
-static int save_initial_data(int fd)
-{
- int page_size;
- char buf[20];
-
- if (write_and_check(fd, "\027\010\104tracing", 10))
- return -1;
-
- if (write_and_check(fd, TRACE_CMD_FILE_VERSION_STRING,
- strlen(TRACE_CMD_FILE_VERSION_STRING) + 1))
- return -1;
-
- /* Crash ensure core file endian and the host endian are the same */
- if (host_bigendian())
- buf[0] = 1;
- else
- buf[0] = 0;
-
- if (write_and_check(fd, buf, 1))
- return -1;
-
- /* save size of long (this may not be what the kernel is) */
- buf[0] = sizeof(long);
- if (write_and_check(fd, buf, 1))
- return -1;
-
- page_size = PAGESIZE();
- if (write_and_check(fd, &page_size, 4))
- return -1;
-
- return 0;
-}
-
-static int save_header_files(int fd)
-{
- /* save header_page */
- if (write_and_check(fd, "header_page", 12))
- return -1;
-
- tmp_fprintf("\tfield: u64 timestamp;\toffset:0;\tsize:8;\tsigned:0;\n");
-
- tmp_fprintf("\tfield: local_t commit;\toffset:8;\tsize:%u;\t"
- "signed:1;\n", (unsigned int)sizeof(long));
-
- tmp_fprintf("\tfield: int overwrite;\toffset:8;\tsize:%u;\tsigned:1;\n",
- (unsigned int)sizeof(long));
-
- tmp_fprintf("\tfield: char data;\toffset:%u;\tsize:%u;\tsigned:1;\n",
- (unsigned int)(8 + sizeof(long)),
- (unsigned int)(PAGESIZE() - 8 - sizeof(long)));
-
- if (tmp_file_record_size8(fd))
- return -1;
- if (tmp_file_flush(fd))
- return -1;
-
- /* save header_event */
- if (write_and_check(fd, "header_event", 13))
- return -1;
-
- tmp_fprintf(
- "# compressed entry header\n"
- "\ttype_len : 5 bits\n"
- "\ttime_delta : 27 bits\n"
- "\tarray : 32 bits\n"
- "\n"
- "\tpadding : type == 29\n"
- "\ttime_extend : type == 30\n"
- "\tdata max type_len == 28\n"
- );
-
- if (tmp_file_record_size8(fd))
- return -1;
- if (tmp_file_flush(fd))
- return -1;
-
- return 0;
-}
-
-static int save_event_file(int fd, struct event_type *t)
-{
- int i, nfields;
- struct ftrace_field *fields;
- int printed_common_field = 0;
-
- tmp_fprintf("name: %s\n", t->name);
- tmp_fprintf("ID: %d\n", t->id);
- tmp_fprintf("format:\n");
-
- if (ftrace_common_fields_count) {
- nfields = ftrace_common_fields_count;
- fields = ftrace_common_fields;
- } else {
- nfields = default_common_field_count;
- fields = &t->fields[t->nfields - nfields];
- }
-
-again:
- for (i = nfields - 1; i >= 0; i--) {
- /*
- * Smartly shows the array type(except dynamic array).
- * Normal:
- * field:TYPE VAR
- * If TYPE := TYPE[LEN], it is shown:
- * field:TYPE VAR[LEN]
- */
- struct ftrace_field *field = &fields[i];
- const char *array_descriptor = strchr(field->type, '[');
-
- if (!strncmp(field->type, "__data_loc", 10))
- array_descriptor = NULL;
-
- if (!array_descriptor) {
- tmp_fprintf("\tfield:%s %s;\toffset:%u;"
- "\tsize:%u;\tsigned:%d;\n",
- field->type, field->name, field->offset,
- field->size, !!field->is_signed);
- } else {
- tmp_fprintf("\tfield:%.*s %s%s;\toffset:%u;"
- "\tsize:%u;\tsigned:%d;\n",
- (int)(array_descriptor - field->type),
- field->type, field->name,
- array_descriptor, field->offset,
- field->size, !!field->is_signed);
- }
- }
-
- if (!printed_common_field) {
- tmp_fprintf("\n");
-
- if (ftrace_common_fields_count)
- nfields = t->nfields;
- else
- nfields = t->nfields - default_common_field_count;
- fields = t->fields;
-
- printed_common_field = 1;
- goto again;
- }
-
- tmp_fprintf("\nprint fmt: %s\n", t->print_fmt);
-
- if (tmp_file_record_size8(fd))
- return -1;
- return tmp_file_flush(fd);
-}
-
-static int save_system_files(int fd, int *system_ids, int system_id)
-{
- int i, total = 0;
-
- for (i = 0; i < nr_event_types; i++) {
- if (system_ids[i] == system_id)
- total++;
- }
-
- if (write_and_check(fd, &total, 4))
- return -1;
-
- for (i = 0; i < nr_event_types; i++) {
- if (system_ids[i] != system_id)
- continue;
-
- if (save_event_file(fd, event_types[i]))
- return -1;
- }
-
- return 0;
-}
-
-static int save_events_files(int fd)
-{
- int system_id = 1, *system_ids;
- const char *system = "ftrace";
- int i;
- int nr_systems;
-
- system_ids = calloc(sizeof(*system_ids), nr_event_types);
- if (system_ids == NULL)
- return -1;
-
- for (;;) {
- for (i = 0; i < nr_event_types; i++) {
- if (system_ids[i])
- continue;
- if (!system) {
- system = event_types[i]->system;
- system_ids[i] = system_id;
- continue;
- }
- if (!strcmp(event_types[i]->system, system))
- system_ids[i] = system_id;
- }
- if (!system)
- break;
- system_id++;
- system = NULL;
- }
-
- /* ftrace events */
- if (save_system_files(fd, system_ids, 1))
- goto fail;
-
- /* other systems events */
- nr_systems = system_id - 2;
- if (write_and_check(fd, &nr_systems, 4))
- goto fail;
- for (system_id = 2; system_id < nr_systems + 2; system_id++) {
- for (i = 0; i < nr_event_types; i++) {
- if (system_ids[i] == system_id)
- break;
- }
- if (write_and_check(fd, (void *)event_types[i]->system,
- strlen(event_types[i]->system) + 1))
- goto fail;
- if (save_system_files(fd, system_ids, system_id))
- goto fail;
- }
-
- free(system_ids);
- return 0;
-
-fail:
- free(system_ids);
- return -1;
-}
-
-static int save_proc_kallsyms(int fd)
-{
- int i;
- struct syment *sp;
-
- for (sp = st->symtable; sp < st->symend; sp++)
- tmp_fprintf("%lx %c %s\n", sp->value, sp->type, sp->name);
-
- for (i = 0; i < st->mods_installed; i++) {
- struct load_module *lm = &st->load_modules[i];
-
- for (sp = lm->mod_symtable; sp <= lm->mod_symend; sp++) {
- if (!strncmp(sp->name, "_MODULE_", strlen("_MODULE_")))
- continue;
-
- /* Currently sp->type for modules is not trusted */
- tmp_fprintf("%lx %c %s\t[%s]\n", sp->value, 'm',
- sp->name, lm->mod_name);
- }
- }
-
- if (tmp_file_record_size4(fd))
- return -1;
- return tmp_file_flush(fd);
-}
-
-static int add_print_address(long address)
-{
- char string[4096];
- size_t len;
- int i;
-
- len = read_string(address, string, sizeof(string));
- if (!len)
- return -1;
-
- tmp_fprintf("0x%lx : \"", address);
-
- for (i = 0; string[i]; i++) {
- switch (string[i]) {
- case '\n':
- tmp_fprintf("\\n");
- break;
- case '\t':
- tmp_fprintf("\\t");
- break;
- case '\\':
- tmp_fprintf("\\\\");
- break;
- case '"':
- tmp_fprintf("\\\"");
- break;
- default:
- tmp_fprintf("%c", string[i]);
- }
- }
- tmp_fprintf("\"\n");
-
- return 0;
-}
-
-static int save_ftrace_printk(int fd)
-{
- struct kernel_list_head *mod_fmt;
- struct syment *s, *e, *b;
- long bprintk_fmt_s, bprintk_fmt_e;
- long *address;
- size_t i, count;
- int addr_is_array = 0;
-
- s = symbol_search("__start___trace_bprintk_fmt");
- e = symbol_search("__stop___trace_bprintk_fmt");
- if (s == NULL || e == NULL)
- return -1;
-
- bprintk_fmt_s = s->value;
- bprintk_fmt_e = e->value;
- count = (bprintk_fmt_e - bprintk_fmt_s) / sizeof(long);
-
- if (count == 0)
- goto do_mods;
-
- address = malloc(count * sizeof(long));
- if (address == NULL)
- return -1;
-
- if (!readmem(bprintk_fmt_s, KVADDR, address, count * sizeof(long),
- "get printk address", RETURN_ON_ERROR)) {
- free(address);
- return -1;
- }
-
- for (i = 0; i < count; i++) {
- if (add_print_address(address[i]) < 0) {
- free(address);
- return -1;
- }
- }
-
- free(address);
-
- do_mods:
-
- /* Add modules */
- b = symbol_search("trace_bprintk_fmt_list");
- if (!b)
- goto out;
-
- switch (MEMBER_TYPE("trace_bprintk_fmt", "fmt")) {
- case TYPE_CODE_ARRAY:
- addr_is_array = 1;
- break;
- case TYPE_CODE_PTR:
- default:
- /* default not array */
- break;
- }
-
- mod_fmt = (struct kernel_list_head *)GETBUF(SIZE(list_head));
- if (!readmem(b->value, KVADDR, mod_fmt,
- SIZE(list_head), "trace_bprintk_fmt_list contents",
- RETURN_ON_ERROR))
- goto out_free;
-
- while ((unsigned long)mod_fmt->next != b->value) {
- unsigned long addr;
-
- addr = (unsigned long)mod_fmt->next + SIZE(list_head);
- if (!addr_is_array) {
- if (!readmem(addr, KVADDR, &addr, sizeof(addr),
- "trace_bprintk_fmt_list fmt field",
- RETURN_ON_ERROR))
- goto out_free;
- }
-
- if (!readmem((unsigned long)mod_fmt->next, KVADDR, mod_fmt,
- SIZE(list_head), "trace_bprintk_fmt_list contents",
- RETURN_ON_ERROR))
- goto out_free;
-
- if (add_print_address(addr) < 0)
- goto out_free;
- count++;
- }
-
- out_free:
- FREEBUF(mod_fmt);
- out:
- if (count == 0) {
- unsigned int size = 0;
- return write_and_check(fd, &size, 4);
- }
- if (tmp_file_record_size4(fd))
- return -1;
- return tmp_file_flush(fd);
-}
-
-static int save_ftrace_cmdlines(int fd)
-{
- int i;
- struct task_context *tc = FIRST_CONTEXT();
-
- for (i = 0; i < RUNNING_TASKS(); i++)
- tmp_fprintf("%d %s\n", (int)tc[i].pid, tc[i].comm);
-
- if (tmp_file_record_size8(fd))
- return -1;
- return tmp_file_flush(fd);
-}
-
-/* From trace-cmd.h */
-enum {
- TRACECMD_OPTION_DONE, /* 0 */
- TRACECMD_OPTION_DATE, /* 1 */
- TRACECMD_OPTION_CPUSTAT, /* 2 */
- TRACECMD_OPTION_BUFFER, /* 3 */
- TRACECMD_OPTION_TRACECLOCK, /* 4 */
- TRACECMD_OPTION_UNAME, /* 5 */
- TRACECMD_OPTION_HOOK, /* 6 */
-};
-
-static int write_options(int fd, unsigned long long *buffer_offsets)
-{
- int i;
- unsigned short option;
-
- if (!multiple_instances_available)
- return 0;
-
- if (write_and_check(fd, "options ", 10))
- return -1;
-
- option = TRACECMD_OPTION_BUFFER;
- for (i = 0; i < instance_count; i++)
- {
- char *name = trace_instances[i].name;
- size_t name_size = strlen(name) + 1; /* Name length + '\0' */
- unsigned long long option_size = 8 + name_size;
- unsigned long long offset;
-
- offset = buffer_offsets ? buffer_offsets[i] : 0;
- if (write_and_check(fd, &option, 2))
- return -1;
- if (write_and_check(fd, &option_size, 4))
- return -1;
- if (write_and_check(fd, &offset, 8))
- return -1;
- if (write_and_check(fd, name, name_size))
- return -1;
- }
-
- option = TRACECMD_OPTION_DONE;
- if (write_and_check(fd, &option, 2))
- return -1;
-
- return 0;
-}
-
-static int save_res_data(int fd, int nr_cpu_buffers, unsigned long long *buffer_offsets)
-{
- if (write_and_check(fd, &nr_cpu_buffers, 4))
- return -1;
-
- if (write_options(fd, buffer_offsets))
- return -1;
-
- if (write_and_check(fd, "flyrecord", 10))
- return -1;
-
- return 0;
-}
-
-static int save_record_data(int fd, int nr_cpu_buffers, struct trace_instance *ti)
-{
- int i, j;
- unsigned long long offset, buffer_offset;
- void *page_tmp;
-
- offset = lseek(fd, 0, SEEK_CUR);
- offset += nr_cpu_buffers * 16;
- offset = (offset + (PAGESIZE() - 1)) & ~(PAGESIZE() - 1);
- buffer_offset = offset;
-
- for (i = 0; i < nr_cpu_ids; i++) {
- struct ring_buffer_per_cpu *cpu_buffer = &ti->buffers[i];
- unsigned long long buffer_size;
-
- if (!cpu_buffer->kaddr)
- continue;
-
- buffer_size = PAGESIZE() * cpu_buffer->nr_linear_pages;
- if (write_and_check(fd, &buffer_offset, 8))
- return -1;
- if (write_and_check(fd, &buffer_size, 8))
- return -1;
- buffer_offset += buffer_size;
- }
-
- page_tmp = malloc(PAGESIZE());
- if (page_tmp == NULL)
- return -1;
-
- lseek(fd, offset, SEEK_SET);
- for (i = 0; i < nr_cpu_ids; i++) {
- struct ring_buffer_per_cpu *cpu_buffer = &ti->buffers[i];
-
- if (!cpu_buffer->kaddr)
- continue;
-
- for (j = 0; j < cpu_buffer->nr_linear_pages; j++) {
- if (ftrace_dump_page(fd, cpu_buffer->linear_pages[j],
- page_tmp) < 0) {
- free(page_tmp);
- return -1;
- }
- }
- }
-
- free(page_tmp);
-
- return 0;
-}
-
-static int get_nr_cpu_buffers(struct trace_instance *ti)
-{
- int i;
- int nr_cpu_buffers = 0;
-
- for (i = 0; i < nr_cpu_ids; i++) {
- struct ring_buffer_per_cpu *cpu_buffer = &ti->buffers[i];
-
- if (!cpu_buffer->kaddr)
- continue;
-
- nr_cpu_buffers++;
- }
-
- return nr_cpu_buffers;
-}
-
-static int __trace_cmd_data_output(int fd)
-{
- int nr_cpu_buffers;
- unsigned long long global_res_data_offset;
- unsigned long long *instance_offsets;
-
- instance_offsets = calloc(sizeof(unsigned long long), instance_count);
-
- nr_cpu_buffers = get_nr_cpu_buffers(&global_trace_instance);
-
- if (save_initial_data(fd))
- return -1;
- if (save_header_files(fd))
- return -1;
- if (save_events_files(fd)) /* ftrace events and other systems events */
- return -1;
- if (save_proc_kallsyms(fd))
- return -1;
- if (save_ftrace_printk(fd))
- return -1;
- if (save_ftrace_cmdlines(fd))
- return -1;
-
- /* We don't have the instance buffer offsets yet, so we'll write in 0s
- * for now, and fix it up after we have that information available */
- global_res_data_offset = lseek(fd, 0, SEEK_CUR);
- if (save_res_data(fd, nr_cpu_buffers, NULL))
- return -1;
- if (save_record_data(fd, nr_cpu_buffers, &global_trace_instance))
- return -1;
-
- if (multiple_instances_available)
- {
- int i;
-
- for (i = 0; i < instance_count; i++)
- {
- struct trace_instance *ti = &trace_instances[i];
- nr_cpu_buffers = get_nr_cpu_buffers(ti);
-
- /* Save off the instance offset for fixup later */
- instance_offsets[i] = lseek(fd, 0, SEEK_CUR);
-
- if (write_and_check(fd, "flyrecord", 10))
- return -1;
- if (save_record_data(fd, nr_cpu_buffers, ti))
- return -1;
- }
- }
-
- /* Fix up the global trace's options header with the instance offsets */
- lseek(fd, global_res_data_offset, SEEK_SET);
- nr_cpu_buffers = get_nr_cpu_buffers(&global_trace_instance);
- if (save_res_data(fd, nr_cpu_buffers, instance_offsets))
- return -1;
-
- return 0;
-}
-
-static int trace_cmd_data_output(int fd)
-{
- int ret;
-
- if (init_tmp_file())
- return -1;
-
- ret = __trace_cmd_data_output(fd);
- destory_tmp_file();
-
- return ret;
-}
diff --git a/extensions/trace.c.README b/extensions/trace.c.README
new file mode 100644
index 000000000000..de1d43ce88a2
--- /dev/null
+++ b/extensions/trace.c.README
@@ -0,0 +1,7 @@
+
+The trace.c extension module moved to the separate repository:
+ https://github.com/fujitsu/crash-trace
+
+See also:
+ https://crash-utility.github.io/extensions.html#TRACE
+
--
2.18.4
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