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Commit ecfd4eff authored Sep 07, 2012 by Pushkar Joshi Committed by Matt Wagantall Jun 22, 2015

tracing: ftrace events for user faults and undefined instructions



New ftrace events (user_fault and undef_instr) for data, prefetch
or undefined instruction aborts. The new ftrace events are under
events/exception.

Change-Id: Iea328b71a1f623861cac9b45d858c3bbe09e1b82
Signed-off-by: Pushkar Joshi <pushkarj@codeaurora.org>
[spjoshi@codeaurora.org: fix merge conflict]
Signed-off-by: Sarangdhar Joshi <spjoshi@codeaurora.org>

parent 2e9a85f7

arch/arm/kernel/traps.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -40,6 +40,7 @@
		#include <asm/system_misc.h>
		#include <asm/opcodes.h>

		#include <trace/events/exception.h>

		static const char *handler[]= {
		"prefetch abort",
		@@ -446,6 +447,8 @@ asmlinkage void __exception do_undefinstr(struct pt_regs *regs)
		return;

		die_sig:
		trace_undef_instr(regs, (void *)pc);

		#ifdef CONFIG_DEBUG_USER
		if (user_debug & UDBG_UNDEFINED) {
		printk(KERN_INFO "%s (%d): undefined instruction: pc=%p\n",

arch/arm/mm/fault.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -28,6 +28,8 @@

		#include "fault.h"

		#include <trace/events/exception.h>

		#ifdef CONFIG_MMU

		#ifdef CONFIG_KPROBES
		@@ -164,6 +166,8 @@ __do_user_fault(struct task_struct *tsk, unsigned long addr,
		{
		struct siginfo si;

		trace_user_fault(tsk, addr, fsr);

		#ifdef CONFIG_DEBUG_USER
		if (((user_debug & UDBG_SEGV) && (sig == SIGSEGV)) \|\|
		((user_debug & UDBG_BUS) && (sig == SIGBUS))) {