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compiler: put debug information on package initializer functions

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Make sure package initializers show up in backtraces, as they should. In
practice, it doesn't actually break backtraces as these functions are
usually inlined anyway, but it may help to debug an error in
initialization code.
This commit is contained in:
Ayke van Laethem
2018-10-06 23:50:35 +02:00
parent 5db43e8d04
commit 482c5633dd
1 changed files with 21 additions and 8 deletions
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compiler/compiler.go
+21 -8
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@@ -815,7 +815,13 @@ func (c *Compiler) parseFuncDecl(f *ir.Function) (*Frame, error) {
frame.fn.LLVMFn = llvm.AddFunction(c.mod, name, fnType)
}
if c.Debug && f.Syntax() != nil && len(f.Blocks) != 0 {
if c.Debug && f.Synthetic == "package initializer" {
difunc, err := c.attachDebugInfoRaw(f, "", 0)
if err != nil {
return nil, err
}
frame.difunc = difunc
} else if c.Debug && f.Syntax() != nil && len(f.Blocks) != 0 {
// Create debug info file if needed.
difunc, err := c.attachDebugInfo(f)
if err != nil {
@@ -829,9 +835,16 @@ func (c *Compiler) parseFuncDecl(f *ir.Function) (*Frame, error) {
func (c *Compiler) attachDebugInfo(f *ir.Function) (llvm.Metadata, error) {
pos := c.ir.Program.Fset.Position(f.Syntax().Pos())
if _, ok := c.difiles[pos.Filename]; !ok {
dir, file := filepath.Split(pos.Filename)
c.difiles[pos.Filename] = c.dibuilder.CreateFile(file, dir[:len(dir)-1])
return c.attachDebugInfoRaw(f, pos.Filename, pos.Line)
}
func (c *Compiler) attachDebugInfoRaw(f *ir.Function, filename string, line int) (llvm.Metadata, error) {
if _, ok := c.difiles[filename]; !ok {
dir, file := filepath.Split(filename)
if dir != "" {
dir = dir[:len(dir)-1]
}
c.difiles[filename] = c.dibuilder.CreateFile(file, dir)
}
// Debug info for this function.
@@ -844,15 +857,15 @@ func (c *Compiler) attachDebugInfo(f *ir.Function) (llvm.Metadata, error) {
diparams = append(diparams, ditype)
}
diFuncType := c.dibuilder.CreateSubroutineType(llvm.DISubroutineType{
File: c.difiles[pos.Filename],
File: c.difiles[filename],
Parameters: diparams,
Flags: 0, // ?
})
difunc := c.dibuilder.CreateFunction(c.difiles[pos.Filename], llvm.DIFunction{
difunc := c.dibuilder.CreateFunction(c.difiles[filename], llvm.DIFunction{
Name: f.RelString(nil),
LinkageName: f.LinkName(),
File: c.difiles[pos.Filename],
Line: pos.Line,
File: c.difiles[filename],
Line: line,
Type: diFuncType,
LocalToUnit: true,
IsDefinition: true,