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cgo: better error message when using an undefined CGo function pointer

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This commit is contained in:
Ayke van Laethem
2019-04-20 02:42:13 +02:00
committed by Ron Evans
parent 21a4c14e86
commit 09db7ead50
1 changed files with 3 additions and 0 deletions
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compiler/compiler.go
+3
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@@ -2576,6 +2576,9 @@ func (c *Compiler) parseUnOp(frame *Frame, unop *ssa.UnOp) (llvm.Value, error) {
global := c.ir.GetGlobal(unop.X.(*ssa.Global))
name := global.LinkName()[:len(global.LinkName())-len("$funcaddr")]
fn := c.mod.NamedFunction(name)
if fn.IsNil() {
return llvm.Value{}, c.makeError(unop.Pos(), "cgo function not found: "+name)
}
return c.builder.CreateBitCast(fn, c.i8ptrType, ""), nil
} else {
c.emitNilCheck(frame, x, "deref")