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reflect: add support for linked lists

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Linked lists are usually implemented as follows:

    type linkedList struct {
        next *linkedList
        data int // whatever
    }

This caused a stack overflow while writing out the reflect run-time type
information. This has now been fixed by splitting the allocation of a
named type number from setting the underlying type in the sidetable.
This commit is contained in:
Ayke van Laethem
2019-08-10 21:52:14 +02:00
committed by Ron Evans
parent 0818a125c0
commit ea8e4079bc
7 changed files with 128 additions and 84 deletions
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compiler/interface.go
+2 -2
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@@ -92,7 +92,7 @@ func (c *Compiler) makeStructTypeFields(typ *types.Struct) llvm.Value {
for i := 0; i < typ.NumFields(); i++ {
fieldGlobalValue := c.getZeroValue(runtimeStructField)
fieldGlobalValue = llvm.ConstInsertValue(fieldGlobalValue, c.getTypeCode(typ.Field(i).Type()), []uint32{0})
fieldName := c.makeGlobalBytes([]byte(typ.Field(i).Name()), "reflect/types.structFieldName")
fieldName := c.makeGlobalArray([]byte(typ.Field(i).Name()), "reflect/types.structFieldName", c.ctx.Int8Type())
fieldName.SetLinkage(llvm.PrivateLinkage)
fieldName.SetUnnamedAddr(true)
fieldName = llvm.ConstGEP(fieldName, []llvm.Value{
@@ -101,7 +101,7 @@ func (c *Compiler) makeStructTypeFields(typ *types.Struct) llvm.Value {
})
fieldGlobalValue = llvm.ConstInsertValue(fieldGlobalValue, fieldName, []uint32{1})
if typ.Tag(i) != "" {
fieldTag := c.makeGlobalBytes([]byte(typ.Tag(i)), "reflect/types.structFieldTag")
fieldTag := c.makeGlobalArray([]byte(typ.Tag(i)), "reflect/types.structFieldTag", c.ctx.Int8Type())
fieldTag = llvm.ConstGEP(fieldTag, []llvm.Value{
llvm.ConstInt(llvm.Int32Type(), 0, false),
llvm.ConstInt(llvm.Int32Type(), 0, false),