2016-07-11 12:48 GMT+02:00 Thomas Deutschmann <[email protected]>:
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> Hi,
>
> Rainer Gerhards wrote:
>> Can you try clang 's address sanitizer? This often works much
>> better than valgrind for me. It would make sense to also compile
>> jmalloc with it.
>
> I tried that. All I am seeing is the following probably unrelated
> compiler warning:
>
>> libtool: compile:  clang -DHAVE_CONFIG_H -I. -I../..
>> -I../../runtime -I../.. -I../../grammar -I/usr/include/libfastjson
>> -W -Wall -Wformat-security -Wshadow -Wcast-align -Wpointer-arith
>> -Wmissing-format-attribute -Werror=implicit-function-de claration
>> -pthread -O2 -pipe -march=ivybridge -mtune=ivybridge -mno-xsaveopt
>> -fsanitize=address -ggdb -c mmcount.c  -fPI C -DPIC -o
>> .libs/mmcount_la-mmcount.o mmcount.c:270:9: warning: cast from
>> 'uchar *' (aka 'unsigned char *') to 'msg_t *' (aka 'struct msg *')
>> increases required alignment from 1 to 8 [-Wcast-align] pMsg =
>> (msg_t*) ppString[0]; ^~~~~~~~~~~~~~~~~~~~ 1 warning generated.
>

that should not pose a problem, it's in for several years.
Nevertheless, there exists an issue tracker to fix this in 8.21.0.

> However when I build rsyslog with "-fsanitize=address" I don't hit the
> problem. Building rsyslog with clang but without "-fsanitize=address"
> flag triggers the problem.

did you build jemalloc also with -fsanitize=address?

If that doesn't work, I unforutnately have no idea left...

Rainer
>
>
> - --
> Regards,
> Thomas
>
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