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 <[email protected]> > --- > 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 <[email protected]> > - * > - * 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 > + > -- Crash-utility mailing list [email protected] https://listman.redhat.com/mailman/listinfo/crash-utility
