01.04.2020 17:20, Slava Bacherikov wrotes: > Currently turning on DEBUG_INFO_SPLIT when DEBUG_INFO_BTF is also > enabled will produce invalid btf file, since gen_btf function in > link-vmlinux.sh script doesn't handle *.dwo files. > > Enabling DEBUG_INFO_REDUCED will also produce invalid btf file, and > using GCC_PLUGIN_RANDSTRUCT with BTF makes no sense. > > Signed-off-by: Slava Bacherikov <slava@xxxxxxxxxxxx> > Reported-by: Jann Horn <jannh@xxxxxxxxxx> > Reported-by: Liu Yiding <liuyd.fnst@xxxxxxxxxxxxxx> > Acked-by: KP Singh <kpsingh@xxxxxxxxxx> > Acked-by: Andrii Nakryiko <andriin@xxxxxx> > Fixes: e83b9f55448a ("kbuild: add ability to generate BTF type info for vmlinux") > --- > lib/Kconfig.debug | 4 +++- > 1 file changed, 3 insertions(+), 1 deletion(-) > > diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug > index f61d834e02fe..b94227be2d62 100644 > --- a/lib/Kconfig.debug > +++ b/lib/Kconfig.debug > @@ -222,7 +222,9 @@ config DEBUG_INFO_DWARF4 > > config DEBUG_INFO_BTF > bool "Generate BTF typeinfo" > - depends on DEBUG_INFO > + depends on DEBUG_INFO || COMPILE_TEST I had to add this, since DEBUG_INFO which depends on: DEBUG_KERNEL && !COMPILE_TEST would block DEBUG_INFO_BTF when COMPILE_TEST is turned on. In that case allyesconfig will emit both: CONFIG_DEBUG_INFO_BTF=y CONFIG_GCC_PLUGIN_RANDSTRUCT=y > + depends on !DEBUG_INFO_SPLIT && !DEBUG_INFO_REDUCED > + depends on !GCC_PLUGIN_RANDSTRUCT || COMPILE_TEST > help > Generate deduplicated BTF type information from DWARF debug info. > Turning this on expects presence of pahole tool, which will convert >