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Commit 9c027e6c authored by Arve Hjønnevåg's avatar Arve Hjønnevåg Committed by Amit Pundir
Browse files

ANDROID: fiq_debugger: Add fiq_watchdog_triggered api 



Dumps registers and stacktrace into console-ramoops when called
from a watchdog fiq.

Change-Id: Ib6fab5a52f670db18e64214d5e4890e8292a749c
Signed-off-by: default avatarArve Hjønnevåg <arve@android.com>
parent 9200a45d

drivers/staging/android/fiq_debugger/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -41,3 +41,9 @@ config FIQ_DEBUGGER_CONSOLE_DEFAULT_ENABLE 
	help

	  If enabled, this puts the fiq debugger into console mode by default.

	  Otherwise, the fiq debugger will start out in debug mode.



config FIQ_WATCHDOG

	bool

	select FIQ_DEBUGGER

	select PSTORE_RAM

	default n

drivers/staging/android/fiq_debugger/Makefile

+2 −1
Original line number Diff line number Diff line 
obj-y			+= fiq_debugger.o

obj-$(CONFIG_ARM)	+= fiq_debugger_arm.o

obj-$(CONFIG_ARM64)	+= fiq_debugger_arm64.o

obj-$(CONFIG_FIQ_WATCHDOG)	+= fiq_watchdog.o

drivers/staging/android/fiq_debugger/fiq_watchdog.c

0 → 100644
+56 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2014 Google, Inc.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */



#include <linux/kernel.h>

#include <linux/spinlock.h>

#include <linux/pstore_ram.h>



#include "fiq_watchdog.h"

#include "fiq_debugger_priv.h"



static DEFINE_RAW_SPINLOCK(fiq_watchdog_lock);



static void fiq_watchdog_printf(struct fiq_debugger_output *output,

				const char *fmt, ...)

{

	char buf[256];

	va_list ap;

	int len;



	va_start(ap, fmt);

	len = vscnprintf(buf, sizeof(buf), fmt, ap);

	va_end(ap);



	ramoops_console_write_buf(buf, len);

}



struct fiq_debugger_output fiq_watchdog_output = {

	.printf = fiq_watchdog_printf,

};



void fiq_watchdog_triggered(const struct pt_regs *regs, void *svc_sp)

{

	char msg[24];

	int len;



	raw_spin_lock(&fiq_watchdog_lock);



	len = scnprintf(msg, sizeof(msg), "watchdog fiq cpu %d\n",

			THREAD_INFO(svc_sp)->cpu);

	ramoops_console_write_buf(msg, len);



	fiq_debugger_dump_stacktrace(&fiq_watchdog_output, regs, 100, svc_sp);



	raw_spin_unlock(&fiq_watchdog_lock);

}

drivers/staging/android/fiq_debugger/fiq_watchdog.h

0 → 100644
+20 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2014 Google, Inc.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 * may be copied, distributed, and modified under those terms.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 */



#ifndef _FIQ_WATCHDOG_H_

#define _FIQ_WATCHDOG_H_



void fiq_watchdog_triggered(const struct pt_regs *regs, void *svc_sp);



#endif