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Include frame-pointer to improve epoll flamegraph tracing

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Motivation:

When attempting to flamegraph netty w/ epoll it was noticed the stacks are lost going from
java to epoll lib.

Modifications:

added the -fno-omit-framepointer flag to compiler flags to ensure the fp is kept intact

Result:

Flamegraphs will now show native code in the same stack as java code using perf-java-flames
This commit is contained in:
T Jake Luciani 2016-12-06 10:19:43 -05:00 committed by Norman Maurer
parent 002c99e751
commit 8d664fa0fd
1 changed files with 2 additions and 2 deletions
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4
transport-native-epoll/pom.xml
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@ -199,7 +199,7 @@
<value>${linux.sendmmsg.support}${glibc.sendmmsg.support}</value> <value>${linux.sendmmsg.support}${glibc.sendmmsg.support}</value>
<!-- If glibc and linux kernel are both not sufficient...then define the CFLAGS --> <!-- If glibc and linux kernel are both not sufficient...then define the CFLAGS -->
<regex>.*IO_NETTY_SENDMSSG_NOT_FOUND.*</regex> <regex>.*IO_NETTY_SENDMSSG_NOT_FOUND.*</regex>
<replacement>CFLAGS=-O3 -DIO_NETTY_SENDMMSG_NOT_FOUND -Werror</replacement> <replacement>CFLAGS=-O3 -DIO_NETTY_SENDMMSG_NOT_FOUND -Werror -fno-omit-frame-pointer</replacement>
<failIfNoMatch>false</failIfNoMatch> <failIfNoMatch>false</failIfNoMatch>
</configuration> </configuration>
</execution> </execution>
@ -215,7 +215,7 @@
<value>${jni.compiler.args.cflags}</value> <value>${jni.compiler.args.cflags}</value>
<!-- If glibc and linux kernel are both not sufficient...then define the CFLAGS --> <!-- If glibc and linux kernel are both not sufficient...then define the CFLAGS -->
<regex>^((?!CFLAGS=).)*$</regex> <regex>^((?!CFLAGS=).)*$</regex>
<replacement>CFLAGS=-O3 -Werror</replacement> <replacement>CFLAGS=-O3 -Werror -fno-omit-frame-pointer</replacement>
<failIfNoMatch>false</failIfNoMatch> <failIfNoMatch>false</failIfNoMatch>
</configuration> </configuration>
</execution> </execution>