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+Sat Apr 16 14:15:55 2005 Soeren Sandmann <sandmann@redhat.com>

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+
+       * TODO: Update
+
+       * sysprof-module.c (x_access_process_vm): On kernel 2.6.9 and
+       later use get_task_mm()/mmput() instead of directly accessing
+       task->mm.
+
This commit is contained in:
Søren Sandmann Pedersen
2005-04-16 21:08:44 +00:00
parent 06023f625e
commit 2b0ca11c6c
5 changed files with 73 additions and 54 deletions
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8
ChangeLog
View File

@ -1,3 +1,11 @@
Sat Apr 16 14:15:55 2005 Soeren Sandmann <sandmann@redhat.com>
* TODO: Update
* sysprof-module.c (x_access_process_vm): On kernel 2.6.9 and
later use get_task_mm()/mmput() instead of directly accessing
task->mm.
Sat Apr 16 01:54:18 2005 Søren Sandmann <sandmann@redhat.com> Sat Apr 16 01:54:18 2005 Søren Sandmann <sandmann@redhat.com>
* TODO: Add backtrace for kernel oops. * TODO: Add backtrace for kernel oops.

2
README
View File

@ -11,7 +11,7 @@ program "sysprof".
- The module must be compiled with the same compiler that compiled the - The module must be compiled with the same compiler that compiled the
kernel it is going to be used with. For most systems that is just kernel it is going to be used with. For most systems that is just
the system compiler, but if you have upgraded your kernel it is the system compiler, but if you have upgraded your kernel it is
possible the one was compiled with a difference compiler. possible the one was compiled with a different compiler.
In that case, "insmod sysprof-module.ko" will produce this In that case, "insmod sysprof-module.ko" will produce this
error message: error message:

99
TODO
View File

@ -6,54 +6,11 @@ Before 1.0:
- or block unloading until all processes have exited - or block unloading until all processes have exited
- Find out what happened here: - Find out what happened here:
[ Try and reproduce by having a ptraced process malloc/mmap a page of memory, then have the - Hopefully the oops at the end of this file is gone now that
ptracing process read a byte from it. we use mmput/get_task_mm. For older kernels those symbols
] are not exported though, so we will probably have to either
use the old way (directly accessing the mm's) or just not
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: Unable to handle kernel NULL pointer dereference at virtual address 000001b8 support those kernels.
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: printing eip:
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: c017342c
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: *pde = 00000000
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: Oops: 0000 [#1]
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: Modules linked in: sysprof_module(U) i2c_algo_bit md5 ipv6 parport_pc lp parport autofs4 sunrpc video button battery ac ohci1394 ieee1394 uhci_hcd ehci_hcd hw_random tpm_atmel tpm i2c_i801 i2c_core snd_intel8x0 snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc e1000 floppy dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod ata_piix libata sd_mod scsi_mod
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: CPU: 0
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: EIP: 0060:[<c017342c>] Not tainted VLI
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: EFLAGS: 00010287 (2.6.11-1.1225_FC4)
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: EIP is at grab_swap_token+0x35/0x21f
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: eax: 0bd48023 ebx: d831d028 ecx: 00000282 edx: 00000000
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: esi: c1b72934 edi: c1045820 ebp: c1b703f0 esp: c18dbdd8
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: ds: 007b es: 007b ss: 0068
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: Process events/0 (pid: 3, threadinfo=c18db000 task=f7e62000)
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: Stack: 000011a8 00000000 000011a8 c1b703f0 c0151731 c016f58f 000011a8 c1b72934
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: 000011a8 c0166415 c1b72934 c1b72934 c0163768 ee7ccc38 f459fbf8 bf92e7b8
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: f6c6a934 c0103b92 bfdaba18 c1b703f0 00000001 c1b81bfc c1b72934 bfdaba18
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: Call Trace:
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0151731>] find_get_page+0x9/0x24
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c016f58f>] read_swap_cache_async+0x32/0x83Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0166415>] do_swap_page+0x262/0x600
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0163768>] pte_alloc_map+0xc6/0x1e6
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0103b92>] common_interrupt+0x1a/0x20
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c01673f0>] handle_mm_fault+0x1da/0x31d
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c016488e>] __follow_page+0xa2/0x10d
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0164a6f>] get_user_pages+0x145/0x6ee
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0161f66>] kmap_high+0x52/0x44e
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0103b92>] common_interrupt+0x1a/0x20
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<f8cbb19d>] x_access_process_vm+0x111/0x1a5 [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb24a>] read_user_space+0x19/0x1d [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb293>] read_frame+0x35/0x51 [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb33a>] generate_stack_trace+0x8b/0xb4
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb3a2>] do_generate+0x3f/0xa0 [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c0138d7a>] worker_thread+0x1b0/0x450
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c0379ccd>] schedule+0x30d/0x780
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c011bdb6>] __wake_up_common+0x39/0x59
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb363>] do_generate+0x0/0xa0 [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c011bd71>] default_wake_function+0x0/0xc
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c0138bca>] worker_thread+0x0/0x450
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c013f3cb>] kthread+0x87/0x8b
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c013f344>] kthread+0x0/0x8b
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c0101275>] kernel_thread_helper+0x5/0xb
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: Code: e0 8b 00 8b 50 74 8b 1d c4 55 3d c0 39
da 0f 84 9b 01 00 00 a1 60 fc 3c c0 39 05 30 ec 48 c0 78 05 83 c4 20 5b c3 a1 60 fc 3c c0 <3b> 82 b8 01 00 00 78 ee 81 3d ac 55 3d c0 3c 4b 24 1d 0f 85 78
* Interface * Interface
- If the current profile has a name, display it in the title bar - If the current profile has a name, display it in the title bar
@ -338,3 +295,49 @@ It is possible that we simply need a better concept of Process:
- autoexpand descendant tree - autoexpand descendant tree
- make double clicks work - make double clicks work
- fix leaks - fix leaks
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: Unable to handle kernel NULL pointer dereference at virtual address 000001b8
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: printing eip:
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: c017342c
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: *pde = 00000000
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: Oops: 0000 [#1]
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: Modules linked in: sysprof_module(U) i2c_algo_bit md5 ipv6 parport_pc lp parport autofs4 sunrpc video button battery ac ohci1394 ieee1394 uhci_hcd ehci_hcd hw_random tpm_atmel tpm i2c_i801 i2c_core snd_intel8x0 snd_ac97_codec snd_pcm_oss snd_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc e1000 floppy dm_snapshot dm_zero dm_mirror ext3 jbd dm_mod ata_piix libata sd_mod scsi_mod
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: CPU: 0
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: EIP: 0060:[<c017342c>] Not tainted VLI
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: EFLAGS: 00010287 (2.6.11-1.1225_FC4)
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: EIP is at grab_swap_token+0x35/0x21f
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: eax: 0bd48023 ebx: d831d028 ecx: 00000282 edx: 00000000
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: esi: c1b72934 edi: c1045820 ebp: c1b703f0 esp: c18dbdd8
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: ds: 007b es: 007b ss: 0068
Apr 11 15:42:08 great-sage-equal-to-heaven kernel: Process events/0 (pid: 3, threadinfo=c18db000 task=f7e62000)
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: Stack: 000011a8 00000000 000011a8 c1b703f0 c0151731 c016f58f 000011a8 c1b72934
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: 000011a8 c0166415 c1b72934 c1b72934 c0163768 ee7ccc38 f459fbf8 bf92e7b8
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: f6c6a934 c0103b92 bfdaba18 c1b703f0 00000001 c1b81bfc c1b72934 bfdaba18
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: Call Trace:
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0151731>] find_get_page+0x9/0x24
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c016f58f>] read_swap_cache_async+0x32/0x83Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0166415>] do_swap_page+0x262/0x600
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0163768>] pte_alloc_map+0xc6/0x1e6
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0103b92>] common_interrupt+0x1a/0x20
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c01673f0>] handle_mm_fault+0x1da/0x31d
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c016488e>] __follow_page+0xa2/0x10d
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0164a6f>] get_user_pages+0x145/0x6ee
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0161f66>] kmap_high+0x52/0x44e
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<c0103b92>] common_interrupt+0x1a/0x20
Apr 11 15:42:09 great-sage-equal-to-heaven kernel: [<f8cbb19d>] x_access_process_vm+0x111/0x1a5 [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb24a>] read_user_space+0x19/0x1d [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb293>] read_frame+0x35/0x51 [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb33a>] generate_stack_trace+0x8b/0xb4
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb3a2>] do_generate+0x3f/0xa0 [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c0138d7a>] worker_thread+0x1b0/0x450
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c0379ccd>] schedule+0x30d/0x780
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c011bdb6>] __wake_up_common+0x39/0x59
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<f8cbb363>] do_generate+0x0/0xa0 [sysprof_module]
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c011bd71>] default_wake_function+0x0/0xc
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c0138bca>] worker_thread+0x0/0x450
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c013f3cb>] kthread+0x87/0x8b
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c013f344>] kthread+0x0/0x8b
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: [<c0101275>] kernel_thread_helper+0x5/0xb
Apr 11 15:42:10 great-sage-equal-to-heaven kernel: Code: e0 8b 00 8b 50 74 8b 1d c4 55 3d c0 39
da 0f 84 9b 01 00 00 a1 60 fc 3c c0 39 05 30 ec 48 c0 78 05 83 c4 20 5b c3 a1 60 fc 3c c0 <3b> 82 b8 01 00 00 78 ee 81 3d ac 55 3d c0 3c 4b 24 1d 0f 85 78

15
sysprof-module.c
View File

@ -76,9 +76,7 @@ init_userspace_reader (userspace_reader *reader,
reader->page = NULL; reader->page = NULL;
} }
/* This is mostly cutted and pasted from ptrace.c /* This function was mostly cutted and pasted from ptrace.c
* I removed some locking and stuff though. I hope it
* wasn't important.
*/ */
/* Access another process' address space. /* Access another process' address space.
@ -94,7 +92,14 @@ x_access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int
struct page *page; struct page *page;
void *old_buf = buf; void *old_buf = buf;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,9)
task_lock (tsk);
mm = tsk->mm; mm = tsk->mm;
task_unlock (tsk);
#else
mm = get_task_mm (tsk);
#endif
if (!mm) if (!mm)
return 0; return 0;
@ -137,6 +142,10 @@ x_access_process_vm(struct task_struct *tsk, unsigned long addr, void *buf, int
} }
up_read(&mm->mmap_sem); up_read(&mm->mmap_sem);
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,9)
mmput(mm);
#endif
return buf - old_buf; return buf - old_buf;
} }

1
sysprof.c
View File

@ -745,7 +745,6 @@ on_about_activated (GtkWidget *widget, gpointer data)
{ {
#define OSLASH "\303\270" #define OSLASH "\303\270"
Application *app = data; Application *app = data;
const char *artist[] = { "Diana Fong", NULL } ;
gtk_show_about_dialog (GTK_WINDOW (app->main_window), gtk_show_about_dialog (GTK_WINDOW (app->main_window),
"logo", app->icon, "logo", app->icon,