Hi Jaihind, On Mon, Jul 20, 2026 at 03:05:45PM +0530, Jaihind Yadav wrote: > GCC records full compiler command lines in DWARF producer strings > by\ndefault. With CONFIG_KSTACK_ERASE, the stackleak plugin is > currently\npassed using an absolute -fplugin path, which can leak > host-specific\nbuild paths into debug artifacts.\n\nResolve the stackleak > plugin directory relative to the current build\ndirectory and use that in the > -fplugin option, falling back to the\nexisting absolute objtree path when > needed.\n\nThis keeps plugin loading behavior unchanged while avoiding > absolute\nworkspace paths in recorded compiler flags.
Please note: while the patch below is applicable, your commit message is
broken ("\n" instead of newlines).
Can you give me a hint on how to reproduce the described behaviour?
I enabled
CONFIG_DEBUG_INFO=y
CONFIG_DEBUG_INFO_DWARF5=y
CONFIG_KSTACK_ERASE=y
and built with O=build but cannot find the path to the plugin dir in any
binary build artifact I grep'ed. What do I have to do to find the
plugin path there?
[...]
> diff --git a/scripts/Makefile.kstack_erase b/scripts/Makefile.kstack_erase
> index ee7e4ef7b8926..006d10f3b77a0 100644
> --- a/scripts/Makefile.kstack_erase
> +++ b/scripts/Makefile.kstack_erase
> @@ -1,7 +1,10 @@
> # SPDX-License-Identifier: GPL-2.0
>
> ifdef CONFIG_GCC_PLUGIN_STACKLEAK
> -kstack-erase-cflags-y +=
> -fplugin=$(objtree)/scripts/gcc-plugins/stackleak_plugin.so
> +stackleak-plugin-dir := $(or \
> + $(shell realpath -m --relative-to=$(CURDIR)
> $(objtree)/scripts/gcc-plugins 2>/dev/null), \
> + $(objtree)/scripts/gcc-plugins)
> +kstack-erase-cflags-y += -fplugin=$(stackleak-plugin-dir)/stackleak_plugin.so
As Kbuild changes the working directory to KBUILD_OUTPUT build dir for
compilation, I'd assume that '$(objtree)/' should just be removed and
scripts/gcc-plugins/stackleak_plugin.so be the always matching relative
path to the plugin:
-kstack-erase-cflags-y +=
-fplugin=$(objtree)/scripts/gcc-plugins/stackleak_plugin.so
+kstack-erase-cflags-y += -fplugin=scripts/gcc-plugins/stackleak_plugin.so
Does that work for you?
Kind regards,
Nicolas
signature.asc
Description: PGP signature
