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Re: [Dotgnu-libjit] Libjit memory errors
From: |
Simone Campanoni |
Subject: |
Re: [Dotgnu-libjit] Libjit memory errors |
Date: |
Mon, 13 Sep 2010 23:45:32 -0400 |
User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.12) Gecko/20100826 Thunderbird/3.0.7 |
Hi Klaus,
On 09/13/2010 01:46 PM, Klaus Treichel wrote:
> Hey Simone,
>
> sorry, that i'm replying so late.
>
No problem at all
>
> Am Mittwoch, den 25.08.2010, 15:42 -0400 schrieb Simone Campanoni:
>
>> Hi Libjit developers,
>> I am Simone Campanoni (author of ILDJIT), I would like to report few
>> memory errors I had on Libjit used within ILDJIT.
>> I am using the last version of the official git repository.
>> Following you can find the output of the valgrind tool.
>> I hope you find this information useful.
>>
>> Thanks
>> simone
>>
>>
>> ======================= output
>> Invalid read of size 4
>> at 0x4B96C8A: jit_insn_iter_next (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B85CBB: compile_block (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B86248: codegen (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B863EF: compile (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B86527: jit_compile_entry (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B865D5: jit_function_compile_entry (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> ....
>> Address 0x1bb8c748 is 8 bytes inside a block of size 64 free'd
>> at 0x47DDB3A: free (vg_replace_malloc.c:366)
>> by 0x4B7EC35: jit_free (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B83503: _jit_block_destroy (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B8E985: jit_insn_label (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B9623D: jit_insn_start_finally (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> ....
>>
>> Invalid read of size 4
>> at 0x4B8393D: jit_block_next (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B8629F: codegen (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B863EF: compile (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B86527: jit_compile_entry (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B865D5: jit_function_compile_entry (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> ....
>> Address 0x1bb8c754 is 20 bytes inside a block of size 64 free'd
>> at 0x47DDB3A: free (vg_replace_malloc.c:366)
>> by 0x4B7EC35: jit_free (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B83503: _jit_block_destroy (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B8E985: jit_insn_label (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B9623D: jit_insn_start_finally (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> ....
>>
>> Invalid read of size 4
>> at 0x4BC96CF: _jit_gen_insn (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B85CAA: compile_block (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B86248: codegen (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B863EF: compile (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B86527: jit_compile_entry (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B865D5: jit_function_compile_entry (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> ....
>> Address 0x1bb8c774 is 52 bytes inside a block of size 64 free'd
>> at 0x47DDB3A: free (vg_replace_malloc.c:366)
>> by 0x4B7EC35: jit_free (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B83503: _jit_block_destroy (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B8E985: jit_insn_label (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B9623D: jit_insn_start_finally (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> ....
>>
>> Invalid read of size 4
>> at 0x4B9C17F: jit_meta_destroy (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B834CE: _jit_block_destroy (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B82F69: _jit_block_free (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B8CD4D: _jit_function_free_builder (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B8657C: jit_function_setup_entry (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> ....
>> Address 0x1bb8c770 is 48 bytes inside a block of size 64 free'd
>> at 0x47DDB3A: free (vg_replace_malloc.c:366)
>> by 0x4B7EC35: jit_free (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B83503: _jit_block_destroy (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B8E985: jit_insn_label (in /home/xan/System/lib/libjit.so.0.0.1)
>> by 0x4B9623D: jit_insn_start_finally (in
>> /home/xan/System/lib/libjit.so.0.0.1)
>>
>>
> Can you supply complete debug information (incl. line numbers)?
>
You right, I didn't see this information was missing, sorry.
I report here one case because I guess every other problems come from
the same memory corruption.
Invalid read of size 4
_jit_block_add_insn (jit-block.c:1115)
jit_insn_store (jit-insn.c:1439)
translate_ir_store (ir_virtual_machine.c:2853)
...
Address 0x770574c is 12 bytes inside a block of size 64 free'd
free (vg_replace_malloc.c:366)
jit_free (jit-alloc.c:126)
_jit_block_destroy (jit-block.c:1007)
jit_insn_label (jit-insn.c:1117)
jit_insn_start_finally (jit-insn.c:7592)
> Does this happen on x86 or x86_64?
>
on x86
> Do you have a testcase i can try with?
>
Unfortunately not yet
> Cheers,
> Klaus
>
Thanks
simone