test: enable debug testing

internal/build/build.go

@@ -122,7 +122,6 @@ const (
 
 func Do(args []string, conf *Config) ([]Package, error) {
 	flags, patterns, verbose := ParseArgs(args, buildFlags)
-	cl.EnableDebugSymbols(IsDebugEnabled())
 	flags = append(flags, "-tags", "llgo")
 	cfg := &packages.Config{
 		Mode:       loadSyntax | packages.NeedDeps | packages.NeedModule | packages.NeedExportFile,
@@ -138,6 +137,7 @@ func Do(args []string, conf *Config) ([]Package, error) {
 		}
 	}
 
+	cl.EnableDebugSymbols(IsDebugEnabled())
 	llssa.Initialize(llssa.InitAll)
 
 	target := &llssa.Target{
@@ -187,7 +187,7 @@ func Do(args []string, conf *Config) ([]Package, error) {
 	})
 
 	buildMode := ssaBuildMode
-	if cl.DebugSymbols() {
+	if IsDebugEnabled() {
 		buildMode |= ssa.GlobalDebug
 	}
 	if !IsOptimizeEnabled() {
@@ -460,7 +460,7 @@ func linkMainPkg(ctx *context, pkg *packages.Package, pkgs []*aPackage, linkArgs
 		}
 	}
 	args = append(args, exargs...)
-	if cl.DebugSymbols() {
+	if IsDebugEnabled() {
 		args = append(args, "-gdwarf-4")
 	}
 

internal/llgen/llgenf.go

@@ -32,6 +32,13 @@ func GenFrom(fileOrPkg string) string {
 }
 
 func genFrom(pkgPath string) (build.Package, error) {
+	oldDbg := os.Getenv("LLGO_DEBUG")
+	dbg := isDbgSymEnabled(filepath.Join(pkgPath, "flags.txt"))
+	if dbg {
+		os.Setenv("LLGO_DEBUG", "1")
+	}
+	defer os.Setenv("LLGO_DEBUG", oldDbg)
+
 	conf := &build.Config{
 		Mode:   build.ModeGen,
 		AppExt: build.DefaultAppExt(),
@@ -49,8 +56,22 @@ func DoFile(fileOrPkg, outFile string) {
 	check(err)
 }
 
-func SmartDoFile(pkgPath ...string) {
-	pkg, err := genFrom(pkgPath[0])
+func isDbgSymEnabled(flagsFile string) bool {
+	data, err := os.ReadFile(flagsFile)
+	if err != nil {
+		return false
+	}
+	toks := strings.Split(strings.Join(strings.Split(string(data), "\n"), " "), " ")
+	for _, tok := range toks {
+		if tok == "-dbg" {
+			return true
+		}
+	}
+	return false
+}
+
+func SmartDoFile(pkgPath string) {
+	pkg, err := genFrom(pkgPath)
 	check(err)
 
 	const autgenFile = "llgo_autogen.ll"