[Crash-utility] [PATCH] extensions: remove trace.c and point to the new repository
lijiang
lijiang at redhat.com
Fri Mar 26 07:59:23 UTC 2021
在 2021年03月26日 12:33, HAGIO KAZUHITO(萩尾 一仁) 写道:
> 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?
>
Thank you for the information, Kazu.
Yes, please go ahead. Hatayama has put the tarball in the github:
https://github.com/fujitsu/crash-trace/archive/v3.0/crash-trace-command-3.0.tar.gz
We can easily update the URL and Source in the spec file.
> extensions/trace.c | 2592 -------------------------------------
> extensions/trace.c.README | 7 +
BTW: It could be good to add a description of the new repository changes in the
top-level README file(at end) instead of a new one. What do you think?
Thanks.
Lianbo
> 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
> +
>
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