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Disable "-fipa-sra" when using "--enable-debuginfo" 

To better enable dynamic tracing tools (e.g. "bpftrace") this change
disables the "-fipa-sra" compilation optimization. This way, function
signatures are not changed by the compiler, which allows us to better
attach to kprobes and kretprobes with dynamic tracing tools. Otherwise,
the compiler may append ".isra" to the function name, and possibly
change the function arguments as well.

Reviewed-by: Matt Ahrens <matt@delphix.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Prakash Surya <prakash.surya@delphix.com>
Closes #9921
This commit is contained in:
Prakash Surya 2020-02-03 09:21:05 -08:00 committed by GitHub
parent 591505dc27
commit 147622b2f1
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1 changed files with 2 additions and 2 deletions
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4
config/zfs-build.m4
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@ -59,9 +59,9 @@ AC_DEFUN([ZFS_AC_DEBUG], [
])
AC_DEFUN([ZFS_AC_DEBUGINFO_ENABLE], [
DEBUG_CFLAGS="$DEBUG_CFLAGS -g -fno-inline"
DEBUG_CFLAGS="$DEBUG_CFLAGS -g -fno-inline -fno-ipa-sra"
KERNEL_DEBUG_CFLAGS="$KERNEL_DEBUG_CFLAGS -fno-inline"
KERNEL_DEBUG_CFLAGS="$KERNEL_DEBUG_CFLAGS -fno-inline -fno-ipa-sra"
KERNEL_MAKE="$KERNEL_MAKE CONFIG_DEBUG_INFO=y"
DEBUGINFO_ZFS="_with_debuginfo"