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

[Kostya Serebryany]

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
>
>
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