Don’t know why Apple Mail didn’t send this. I noticed after restarting:
By default you should see some leaks from CRYPTO_malloc even if you don’t have
TLS/SSL configured. I am running Fedora 24.
[bcall@homer trafficserver]$ sudo /usr/local/bin/traffic_server
traffic_server: using root directory '/usr/local'
^Ctraffic_server: Interrupt (Signal sent by the kernel 0 0)
=================================================================
==9081==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 48 byte(s) in 1 object(s) allocated from:
#0 0x7f2a242f7e60 in malloc (/lib64/libasan.so.3+0xc6e60)
#1 0x7f2a231320b7 in CRYPTO_malloc (/lib64/libcrypto.so.10+0x6e0b7)
Indirect leak of 120 byte(s) in 1 object(s) allocated from:
#0 0x7f2a242f7e60 in malloc (/lib64/libasan.so.3+0xc6e60)
#1 0x7f2a231320b7 in CRYPTO_malloc (/lib64/libcrypto.so.10+0x6e0b7)
SUMMARY: AddressSanitizer: 168 byte(s) leaked in 2 allocation(s).
-Bryan
> On Nov 10, 2016, at 2:22 PM, Vamsi Ambati <[email protected]> wrote:
>
> Hi Sudheer,
>
> Thanks for the quick response.
> I tried with your suggested code snippet but Address sanitizer doesn’t detect
> the leak.
> I even tried with gdb by introducing break point at __asan_report_error.
>
>
> Vamsi
>
>> On Nov 10, 2016, at 1:58 PM, Sudheer Vinukonda <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>> Not sure if the *leak* in your test code below is detectable..since your
>> program is exiting after allocating the memory (system should automatically
>> reclaim the memory on process exit).
>>
>> You may try to modify it to something more explicit like the below -
>>
>>> #include <stdlib.h>
>>> void dummy() {
>>> char *c = (char*) malloc(20);
>> c = (char*) malloc(100);
>>> }
>>> int main() {
>>> dummy();
>>> while(1) {}
>>> }
>>
>>
>>
>> On Nov 10, 2016, at 1:43 PM, Vamsi Ambati <[email protected]
>> <mailto:[email protected]>> wrote:
>>
>>>
>>> I am trying to resolve a memory leak issue with ATS 7.0 version.
>>> We are using ATS from the CDN perspective and developed 3 plugins.
>>> DevOps complains that traffic_server process gradually consumes lot of
>>> memory and does release back which is a sign of memory leak.
>>> I tried with Valgrind but it didn’t work because of LUA and one of our ATS
>>> community member suggested to use Address Sanitizer.
>>> I followed exactly the steps mentioned Debugging Traffic Server using
>>> ASAN
>>> <https://cwiki.apache.org/confluence/download/attachments/56066455/summit_asan.pptx?version=1&modificationDate=1429916307000&api=v2>.
>>>
>>> I have build the traffic server with CXXFLAGS=-fno-omit-frame-pointer
>>> -fsanitize=address
>>> Verified that traffic_server is build with ASAN library by 'ldd
>>> bin/traffic_server’
>>> Restarted the traffic server with 'service nm-trafficserver restart'.
>>>
>>> I have adopted three approaches to catch the memory leak
>>>
>>> Approach 1:
>>> Just running the traffic server(with -f option) and continuously sending
>>> HTTP requests using wrk (from another machine) by attaching
>>> to a gdb .
>>> ' gdb $(pidof traffic_server)’
>>> break __asan_report_error.
>>>
>>> Issue: I didn’t hit this function from the memory leak perspective.
>>>
>>> Approach 2:
>>> I have run the traffic server with PROXY_AUTO_EXIT and sending the http
>>> requests
>>> PROXY_AUTO_EXIT=30 ASAN_OPTIONS=detect_leaks=1:verbosity=2
>>> bin/traffic_server -f
>>>
>>> Issue: Tool didn’t complain any thing about the memory leak.
>>>
>>>
>>> Approach 3:
>>> I have created simple code explicitly introducing the memory leak
>>>
>>> #include <stdlib.h>
>>> void dummy() {
>>> malloc(20);
>>> }
>>> int main() {
>>> dummy();
>>> return 0;
>>> }
>>>
>>> Compiled with g++ -fsanitize=address add.cpp
>>> Executed like ASAN_OPTIONS=detect_leaks=1 ./a.out
>>>
>>> Issue: Tool didn’t detect this memory leak.
>>>
>>>
>>> Production System Configuration:
>>>
>>> 16Gb Ram with 8 cores VM.
>>> gcc --version
>>> gcc (Ubuntu 4.8.4-2ubuntu1~14.04.3) 4.8.4
>>>
>>> Did any one encounter this ASAN issue on Ubuntu 14.04 ? If so, how did
>>> they resolve it ?
>>> Any other suggestions how to narrow down the memory leak issue with ATS ?
>>>
>>>
>>>
>>> Regards
>>> Vamsi
>>>
>>> PS: I am new to the community and new to Apache traffic server open source
>>> module too.
>>>
>>>
>>>
>>>
>
