Disable "-fipa-sra" when using "--enable-debuginfo" (openzfs#127)

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 <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Reviewed-by: Igor Kozhukhov <[email protected]> Reviewed-by: George Melikov <[email protected]> Signed-off-by: Prakash Surya <[email protected]> Closes openzfs#9921
sdimitro · Feb 13, 2020 · 86faae6 · 86faae6
1 parent 854ba47
commit 86faae6
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/config/zfs-build.m4 b/config/zfs-build.m4
@@ -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"