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

[Alexey Samsonov]

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.
>

r162442. I've got a CMake build support for it locally, but I'll discuss it
with community first.


>
> --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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