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Commit 802f3427 authored by yong qian's avatar yong qian Committed by Todd Kjos
Browse files

ANDROID: vendor_hooks: Add hooks for debugging exception context 



When some processes crashed, we want to save cpu regs(x0-x30、pc、sp)，
and context(task_struct、thread_info) to log for debugging

Bug: 166228327

Signed-off-by: default avataryong qian <qianyong@oppo.com>
Change-Id: I4f49ffed583a0e20f1aaa7e445e85a0cbb603bbe
parent 40f057fb

arch/arm64/kernel/process.c

+2 −0
Original line number Diff line number Diff line
@@ -55,6 +55,7 @@ 
#include <asm/pointer_auth.h>

#include <asm/scs.h>

#include <asm/stacktrace.h>

#include <trace/hooks/minidump.h>



#if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_STACKPROTECTOR_PER_TASK)

#include <linux/stackprotector.h>
@@ -254,6 +255,7 @@ void __show_regs(struct pt_regs *regs) 
		top_reg = 29;

	}



	trace_android_vh_show_regs(regs);

	show_regs_print_info(KERN_DEFAULT);

	print_pstate(regs);

drivers/android/vendor_hooks.c

+2 −0
Original line number Diff line number Diff line
@@ -17,6 +17,7 @@ 
#include <trace/hooks/fpsimd.h>

#include <trace/hooks/topology.h>

#include <trace/hooks/debug.h>

#include <trace/hooks/minidump.h>



/*

 * Export tracepoints that act as a bare tracehook (ie: have no trace event
@@ -56,3 +57,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alter_futex_plist_add); 
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_is_fpsimd_save);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_ipi_stop);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_printk_store);

EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_show_regs);

include/trace/hooks/minidump.h

0 → 100644
+24 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0 */

#undef TRACE_SYSTEM

#define TRACE_SYSTEM minidump



#define TRACE_INCLUDE_PATH trace/hooks



#if !defined(_TRACE_HOOK_MINIDUMP_H) || defined(TRACE_HEADER_MULTI_READ)

#define _TRACE_HOOK_MINIDUMP_H

#include <linux/tracepoint.h>

#include <trace/hooks/vendor_hooks.h>



#if defined(CONFIG_TRACEPOINTS) && defined(CONFIG_ANDROID_VENDOR_HOOKS)

struct pt_regs;

DECLARE_HOOK(android_vh_show_regs,

	TP_PROTO(struct pt_regs *regs),

	TP_ARGS(regs));

#else

#define trace_android_vh_show_regs(regs)

#endif



#endif /* _TRACE_HOOK_MINIDUMP_H */

/* This part must be outside protection */

#include <trace/define_trace.h>