Merge "Add option to generate BTF debug info for bpf programs" am: c7afdefa26 am: e375f4c53e am: aae5c94a71
Original change: https://android-review.googlesource.com/c/platform/build/soong/+/1909413
Change-Id: I44c4b8bb79a9bf3ae020cfeea6d66d267075ad44
diff --git a/bpf/bpf.go b/bpf/bpf.go
index 187b4db..a4999e5 100644
--- a/bpf/bpf.go
+++ b/bpf/bpf.go
@@ -23,6 +23,7 @@
_ "android/soong/cc/config"
"github.com/google/blueprint"
+ "github.com/google/blueprint/proptools"
)
func init() {
@@ -41,6 +42,14 @@
CommandDeps: []string{"$ccCmd"},
},
"ccCmd", "cFlags")
+
+ stripRule = pctx.AndroidStaticRule("stripRule",
+ blueprint.RuleParams{
+ Command: `$stripCmd --strip-unneeded --remove-section=.rel.BTF ` +
+ `--remove-section=.rel.BTF.ext --remove-section=.BTF.ext $in -o $out`,
+ CommandDeps: []string{"$stripCmd"},
+ },
+ "stripCmd")
)
func registerBpfBuildComponents(ctx android.RegistrationContext) {
@@ -64,6 +73,8 @@
Cflags []string
Include_dirs []string
Sub_dir string
+ // If set to true, generate BTF debug info for maps & programs
+ Btf *bool
}
type bpf struct {
@@ -99,10 +110,14 @@
cflags = append(cflags, bpf.properties.Cflags...)
+ if proptools.Bool(bpf.properties.Btf) {
+ cflags = append(cflags, "-g")
+ }
+
srcs := android.PathsForModuleSrc(ctx, bpf.properties.Srcs)
for _, src := range srcs {
- obj := android.ObjPathWithExt(ctx, "", src, "o")
+ obj := android.ObjPathWithExt(ctx, "unstripped", src, "o")
ctx.Build(pctx, android.BuildParams{
Rule: ccRule,
@@ -114,7 +129,21 @@
},
})
- bpf.objs = append(bpf.objs, obj.WithoutRel())
+ if proptools.Bool(bpf.properties.Btf) {
+ objStripped := android.ObjPathWithExt(ctx, "", src, "o")
+ ctx.Build(pctx, android.BuildParams{
+ Rule: stripRule,
+ Input: obj,
+ Output: objStripped,
+ Args: map[string]string{
+ "stripCmd": "${config.ClangBin}/llvm-strip",
+ },
+ })
+ bpf.objs = append(bpf.objs, objStripped.WithoutRel())
+ } else {
+ bpf.objs = append(bpf.objs, obj.WithoutRel())
+ }
+
}
}