我正在開發Pintos OS項目。我收到此消息:Emacs -GDB跟蹤權限中斷而不通過所有文件
Page fault at 0xbfffefe0: not present error writing page in user context.
Pintos OS項目的問題是它不會簡單地告訴導致異常的行和方法。
我知道如何使用斷點/觀察點等,但有沒有任何方法可以直接進入它,而無需逐行瀏覽整個流程和所有操作系統文件,這樣我就可以跳入導致異常並將斷點那裏?我查看了GDB命令,但沒有找到任何東西。
當我調試這個項目時,我必須遍歷整個程序,直到找到非常耗時的錯誤/異常。可能有更快的方法來做到這一點。
感謝。 整個跟蹤:
[email protected]:~/Class/pintos/proj-3-bhling-nestilll-nsren/src/vm/build$ pintos -v -k -T 60 --qemu --gdb --filesys-size=2 -p tests/vm/pt-grow-pusha -a pt-grow-pusha --swap-size=4 -- -q -f run pt-grow-pusha
Use of literal control characters in variable names is deprecated at /home/nestilll/Class/pintos/src/utils/pintos line 909.
Prototype mismatch: sub main::SIGVTALRM() vs none at /home/nestilll/Class/pintos/src/utils/pintos line 933.
Constant subroutine SIGVTALRM redefined at /home/nestilll/Class/pintos/src/utils/pintos line 925.
warning: disabling timeout with --gdb
Copying tests/vm/pt-grow-pusha to scratch partition...
qemu -hda /tmp/N2JbACdqyV.dsk -m 4 -net none -nographic -s -S
PiLo hda1
Loading............
Kernel command line: -q -f extract run pt-grow-pusha
Pintos booting with 4,088 kB RAM...
382 pages available in kernel pool.
382 pages available in user pool.
Calibrating timer... 419,020,800 loops/s.
hda: 13,104 sectors (6 MB), model "QM00001", serial "QEMU HARDDISK"
hda1: 205 sectors (102 kB), Pintos OS kernel (20)
hda2: 4,096 sectors (2 MB), Pintos file system (21)
hda3: 98 sectors (49 kB), Pintos scratch (22)
hda4: 8,192 sectors (4 MB), Pintos swap (23)
filesys: using hda2
scratch: using hda3
swap: using hda4
Formatting file system...done.
Boot complete.
Extracting ustar archive from scratch device into file system...
Putting 'pt-grow-pusha' into the file system...
Erasing ustar archive...
Executing 'pt-grow-pusha':
(pt-grow-pusha) begin
Page fault at 0xbfffefe0: not present error writing page in user context.
pt-grow-pusha: dying due to interrupt 0x0e (#PF Page-Fault Exception).
Interrupt 0x0e (#PF Page-Fault Exception) at eip=0x804809c
cr2=bfffefe0 error=00000006
eax=bfffff8c ebx=00000000 ecx=0000000e edx=00000027
esi=00000000 edi=00000000 esp=bffff000 ebp=bfffffa8
cs=001b ds=0023 es=0023 ss=0023
pt-grow-pusha: exit(-1)
Execution of 'pt-grow-pusha' complete.
Timer: 71 ticks
Thread: 0 idle ticks, 63 kernel ticks, 8 user ticks
hda2 (filesys): 62 reads, 200 writes
hda3 (scratch): 97 reads, 2 writes
hda4 (swap): 0 reads, 0 writes
Console: 1359 characters output
Keyboard: 0 keys pressed
Exception: 1 page faults
Powering off...
問題是我不知道所需的位置在哪裏,直到我從開始到結束步驟,直到出現相同的異常/錯誤。在其他項目中,例如,在簡單的Java中,我可以讀取堆棧跟蹤來執行此操作。無論如何要做Pintos操作系統? –
'gdb'有一個顯示堆棧跟蹤的命令。您可以使用'bt'或'backtrace'來顯示堆棧回溯。 – user3629249
是的,我也使用過,並不總是有幫助。但謝謝你的建議。 –