tools lib traceevent: Add function plugin
Backporting function plugin. Backported from Steven Rostedt's trace-cmd repo (HEAD 0f2c2fb): git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git This plugin adds function and parent function fields resolving for ftrace:function tracepoint event. The diff of 'perf script' output generated by old and new code: (data was generated by 'perf record -e ftrace:function ls') --- script.function.old +++ script.function.new - ls 10781 [001] 32667.291379: ftrace:function: ffffffff811adb80 <-- ffffffff811afc48 - ls 10781 [001] 32667.291379: ftrace:function: ffffffff811b35d0 <-- ffffffff811adb9b - ls 10781 [001] 32667.291380: ftrace:function: ffffffff811b3520 <-- ffffffff811b35e8 - ls 10781 [001] 32667.291380: ftrace:function: ffffffff811b2720 <-- ffffffff811b3549 - ls 10781 [001] 32667.291381: ftrace:function: ffffffff81297e10 <-- ffffffff811b356c - ls 10781 [001] 32667.291381: ftrace:function: ffffffff81298f40 <-- ffffffff81297e2c - ls 10781 [001] 32667.291382: ftrace:function: ffffffff81076160 <-- ffffffff811afbf0 - ls 10781 [001] 32667.291383: ftrace:function: ffffffff811c3eb0 <-- ffffffff811afbfc - ls 10781 [001] 32667.291383: ftrace:function: ffffffff8164e100 <-- ffffffff811c3ed8 - ls 10781 [001] 32667.291384: ftrace:function: ffffffff811a5d10 <-- ffffffff811c3f53 - ls 10781 [001] 32667.291384: ftrace:function: ffffffff811e8e70 <-- ffffffff811a5d58 - ls 10781 [001] 32667.291385: ftrace:function: ffffffff811f38e0 <-- ffffffff811a5d63 - ls 10781 [001] 32667.291385: ftrace:function: ffffffff811a9ff0 <-- ffffffff811a5d6b - ls 10781 [001] 32667.291386: ftrace:function: ffffffff811a9fa0 <-- ffffffff811aa015 - ls 10781 [001] 32667.291387: ftrace:function: ffffffff810851c0 <-- ffffffff811aa053 - ls 10781 [001] 32667.291387: ftrace:function: ffffffff81090e00 <-- ffffffff81085211 + ls 10781 [001] 32667.291379: ftrace:function: would_dump <-- setup_new_exec + ls 10781 [001] 32667.291379: ftrace:function: inode_permission <-- would_dump + ls 10781 [001] 32667.291380: ftrace:function: __inode_permission <-- inode_permission + ls 10781 [001] 32667.291380: ftrace:function: generic_permission <-- __inode_permission + ls 10781 [001] 32667.291381: ftrace:function: security_inode_permission <-- __inode_permission + ls 10781 [001] 32667.291381: ftrace:function: cap_inode_permission <-- security_inode_permission + ls 10781 [001] 32667.291382: ftrace:function: flush_signal_handlers <-- setup_new_exec + ls 10781 [001] 32667.291383: ftrace:function: do_close_on_exec <-- setup_new_exec + ls 10781 [001] 32667.291383: ftrace:function: _raw_spin_lock <-- do_close_on_exec + ls 10781 [001] 32667.291384: ftrace:function: filp_close <-- do_close_on_exec + ls 10781 [001] 32667.291384: ftrace:function: dnotify_flush <-- filp_close + ls 10781 [001] 32667.291385: ftrace:function: locks_remove_posix <-- filp_close + ls 10781 [001] 32667.291385: ftrace:function: fput <-- filp_close + ls 10781 [001] 32667.291386: ftrace:function: file_sb_list_del <-- fput + ls 10781 [001] 32667.291387: ftrace:function: task_work_add <-- fput + ls 10781 [001] 32667.291387: ftrace:function: kick_process <-- task_work_add Removing options support as it's not backported yet. Currently this plugin supports 2 options: 'parent' to display parent function 'indent' to show function call indents Enabling both of them by default. Signed-off-by: Jiri Olsa <jolsa@redhat.com> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/1386076182-14484-19-git-send-email-jolsa@redhat.com Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa
Arnaldo Carvalho de Melo
parent
83e815ee1c
commit
07a180a0bf
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@ -218,6 +218,7 @@ PLUGIN_OBJS += plugin_kmem.o
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PLUGIN_OBJS += plugin_kvm.o
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PLUGIN_OBJS += plugin_kvm.o
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PLUGIN_OBJS += plugin_mac80211.o
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PLUGIN_OBJS += plugin_mac80211.o
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PLUGIN_OBJS += plugin_sched_switch.o
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PLUGIN_OBJS += plugin_sched_switch.o
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PLUGIN_OBJS += plugin_function.o
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PLUGINS := $(PLUGIN_OBJS:.o=.so)
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PLUGINS := $(PLUGIN_OBJS:.o=.so)
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@ -0,0 +1,151 @@
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/*
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* Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation;
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* version 2.1 of the License (not later!)
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, see <http://www.gnu.org/licenses>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "event-parse.h"
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#include "event-utils.h"
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static struct func_stack {
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int index;
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int size;
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char **stack;
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} *fstack;
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static int cpus = -1;
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#define STK_BLK 10
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static void add_child(struct func_stack *stack, const char *child, int pos)
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{
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int i;
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if (!child)
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return;
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if (pos < stack->size)
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free(stack->stack[pos]);
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else {
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if (!stack->stack)
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stack->stack = malloc_or_die(sizeof(char *) * STK_BLK);
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else
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stack->stack = realloc(stack->stack, sizeof(char *) *
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(stack->size + STK_BLK));
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for (i = stack->size; i < stack->size + STK_BLK; i++)
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stack->stack[i] = NULL;
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stack->size += STK_BLK;
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}
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stack->stack[pos] = strdup(child);
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}
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static int get_index(const char *parent, const char *child, int cpu)
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{
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int i;
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if (cpu < 0)
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return 0;
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if (cpu > cpus) {
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if (fstack)
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fstack = realloc(fstack, sizeof(*fstack) * (cpu + 1));
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else
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fstack = malloc_or_die(sizeof(*fstack) * (cpu + 1));
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/* Account for holes in the cpu count */
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for (i = cpus + 1; i <= cpu; i++)
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memset(&fstack[i], 0, sizeof(fstack[i]));
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cpus = cpu;
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}
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for (i = 0; i < fstack[cpu].size && fstack[cpu].stack[i]; i++) {
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if (strcmp(parent, fstack[cpu].stack[i]) == 0) {
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add_child(&fstack[cpu], child, i+1);
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return i;
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}
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}
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/* Not found */
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add_child(&fstack[cpu], parent, 0);
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add_child(&fstack[cpu], child, 1);
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return 0;
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}
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static int function_handler(struct trace_seq *s, struct pevent_record *record,
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struct event_format *event, void *context)
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{
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struct pevent *pevent = event->pevent;
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unsigned long long function;
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unsigned long long pfunction;
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const char *func;
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const char *parent;
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int i, index;
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if (pevent_get_field_val(s, event, "ip", record, &function, 1))
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return trace_seq_putc(s, '!');
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func = pevent_find_function(pevent, function);
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if (pevent_get_field_val(s, event, "parent_ip", record, &pfunction, 1))
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return trace_seq_putc(s, '!');
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parent = pevent_find_function(pevent, pfunction);
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index = get_index(parent, func, record->cpu);
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for (i = 0; i < index; i++)
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trace_seq_printf(s, " ");
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if (func)
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trace_seq_printf(s, "%s", func);
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else
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trace_seq_printf(s, "0x%llx", function);
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trace_seq_printf(s, " <-- ");
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if (parent)
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trace_seq_printf(s, "%s", parent);
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else
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trace_seq_printf(s, "0x%llx", pfunction);
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return 0;
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}
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int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
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{
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pevent_register_event_handler(pevent, -1, "ftrace", "function",
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function_handler, NULL);
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return 0;
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}
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void PEVENT_PLUGIN_UNLOADER(void)
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{
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int i, x;
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for (i = 0; i <= cpus; i++) {
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for (x = 0; x < fstack[i].size && fstack[i].stack[x]; x++)
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free(fstack[i].stack[x]);
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free(fstack[i].stack);
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}
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free(fstack);
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fstack = NULL;
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cpus = -1;
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}
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