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--- software:freebsd:kernel_debug [2018/11/05 02:30]
– создано root
+++ software:freebsd:kernel_debug [2022/02/04 18:33]
– removed - external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-====== Опции и параметры необходимые для получения coredump ядра ======
-Актуально для FreeBSD 11.2, 12.0
-===== Конфиг ядра =====
-Должен содержать:
-<code>
-options		GZIO			#m zlib I/O stream support. Enables support for compressed core dumps.
-# Debugging support. Always need this:
-makeoptions	DEBUG=-g		# Build kernel with gdb(1) debug symbols
-options		HWPMC_HOOKS		#oD Necessary kernel hooks for hwpmc(4)
-options		KDB			#oD Enable kernel debugger support, rquied for DDB, GDB. Little or no performance overhead.
-options		KDB_TRACE		#oD Set debug.trace_on_panic=1 - Print a stack trace for a panic.
-options		KDB_UNATTENDED		#oD Set debug.debugger_on_panic=0 - reboot.
-options		KTRACE			#oD ktrace(1) support
-options		STACK			#oD stack(9) support
-options		PANIC_REBOOT_WAIT_TIME=16 #o Set the amount of time (in seconds) the system will wait before rebooting automatically when a kernel panic occurs. (-1) = inf
-</code>
-===== Настройки системы =====
-==== /etc/rc.conf ====
-<code># Debug
-dumpdev="AUTO"			# Device to crashdump to (device name, AUTO, or NO).
-dumpon_flags="-z"		# Options to pass to dumpon(8), followed by dumpdev.
-savecore_enable="YES"		# Extract core from dump devices if any
-savecore_flags="-z -v -m 16"	# Used if dumpdev is enabled above, and present.
-crashinfo_enable="YES"		# Automatically generate crash dump summary.
-</code>
-==== /etc/sysctl.conf ====
-<code># Debug kernel
-debug.minidump=1			# Enable mini crash dumps
-kern.sync_on_panic=0			# Do a sync before rebooting from a panic / 0 - required for coredump write
-kern.panic_reboot_wait_time=16		# Seconds to wait before rebooting after a panic
-kern.kerneldump_gzlevel=3		# Kernel crash dump compression level
-</code>
-==== /etc/src.conf ====
-<code>WITH_KERNEL_SYMBOLS=
-# Set to not install kernel symbol files.
-</code>
-Либо файл /etc/src.conf должен отсутствовать, либо в нём не должно быть WITHOUT_KERNEL_SYMBOLS=
-==== /etc/fstab ====
-Вариант с шифрованным swap:
-<code>/dev/gptid/0714a812-b98e-11e8-a831-7085c2375722.eli none	swap	sw,late,ealgo=AES-XTS,keylen=256,sectorsize=4096	0	0
-</code>
-Обычный swap:
-<code>/dev/ada1p1		none					swap	sw						0	0</code>

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