[llvm-commits] [Sanitizer] PATCH: external llvm-symbolizer tool for sanitizers

[Dmitry Vyukov]

On Thu, Aug 23, 2012 at 2:58 PM, Alexey Samsonov <samsonov at google.com>wrote:

> And a follow-up from looking at the output. File/line numbers seem to be
> fetched correctly, but that isn't always true for function names:
> if instruction belongs to inlined instance of a function, then we may (and
> often do) instead return the function it is inlined into.
>

It is the correct behavior.
As a bonus we may also output inlined frames, but by default we must output
inlined-into frame.



> This
> should be fixed in DebugInfo library, I'll work on that.
>
> On Thu, Aug 23, 2012 at 2:30 PM, Kostya Serebryany <kcc at google.com> wrote:
>
>> Excellent numbers!
>> addr2line performance and memory usage has been the greatest
>> inconvenience for many users.
>> Please commit unless there are objections from someone else.
>>
>> --kcc
>>
>>
>> On Thu, Aug 23, 2012 at 2:05 PM, Alexey Samsonov <samsonov at google.com>wrote:
>>
>>> For the record, I've ran some measurements on Chromium (fetched random
>>> instruction addresses from binary and symbolized them with a tool):
>>>
>>> chrome + "-gline-tables-only" (0.5G binary)
>>> tool             # of addresses       time                memory
>>> addr2line     1                          0m16.803s
>>> symbolizer   1                          0m0.501s
>>> addr2line     100                       0m22.474s
>>> symbolizer   100                       0m1.417s
>>> addr2line     10k                       1m45.055s     2.1G
>>> symbolizer   10k                       1m23.271s     440 Mb
>>>
>>> chrome + "-g" (2G binary):
>>> addr2line     1                          0m36.101s
>>> symbolizer   1                          0m10.101s
>>> addr2line     100                       0m46.125s
>>> symbolizer   100                       0m10.005s
>>> addr2line     10k                       2m32.614s     9.2G
>>> symbolizer   10k                       1m41.288s     3.9G
>>>
>>>
>>> On Tue, Aug 21, 2012 at 7:34 PM, Alexey Samsonov <samsonov at google.com>wrote:
>>>
>>>> Hi!
>>>>
>>>> This code contains a stand-alone file that makes use of existing LLVM
>>>> libraries to symbolize instruction addresses of a module.
>>>> Though it looks like an another llvm tool, we can temporary keep it at
>>>> //projects/compiler-rt (as currently we're the only interested users,
>>>> and we need to compile this tool for the same targets we build
>>>> ASan/TSan for). This file may be run in a separate process, and
>>>> communicate with caller via stdin/stdout. The key differences from
>>>> addr2line is that the tool is capable of symbolizing code from
>>>> different modules and is able to consult both symbol table and debug
>>>> info for fetching function name (which would be helpful
>>>> if the binary is compiled with -gline-tables-only).
>>>>
>>>> Code review: http://codereview.appspot.com/6465080/
>>>>
>>>> --
>>>> Alexey Samsonov, MSK
>>>>
>>>>
>>>
>>>
>>> --
>>> Alexey Samsonov, MSK
>>>
>>>
>>
>
>
> --
> Alexey Samsonov, MSK
>
>
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