diff options
Diffstat (limited to 'libgo/misc/cgo/test/issue10303.go')
-rw-r--r-- | libgo/misc/cgo/test/issue10303.go | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/libgo/misc/cgo/test/issue10303.go b/libgo/misc/cgo/test/issue10303.go new file mode 100644 index 00000000000..66e2644d066 --- /dev/null +++ b/libgo/misc/cgo/test/issue10303.go @@ -0,0 +1,76 @@ +// Copyright 2015 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +// Issue 10303. Pointers passed to C were not marked as escaping (bug in cgo). + +package cgotest + +import "runtime" + +/* +typedef int *intptr; + +void setintstar(int *x) { + *x = 1; +} + +void setintptr(intptr x) { + *x = 1; +} + +void setvoidptr(void *x) { + *(int*)x = 1; +} + +typedef struct Struct Struct; +struct Struct { + int *P; +}; + +void setstruct(Struct s) { + *s.P = 1; +} + +*/ +import "C" + +import ( + "testing" + "unsafe" +) + +func test10303(t *testing.T, n int) { + if runtime.Compiler == "gccgo" { + t.Skip("gccgo permits C pointers on the stack") + } + + // Run at a few different stack depths just to avoid an unlucky pass + // due to variables ending up on different pages. + if n > 0 { + test10303(t, n-1) + } + if t.Failed() { + return + } + var x, y, z, v, si C.int + var s C.Struct + C.setintstar(&x) + C.setintptr(&y) + C.setvoidptr(unsafe.Pointer(&v)) + s.P = &si + C.setstruct(s) + + if uintptr(unsafe.Pointer(&x))&^0xfff == uintptr(unsafe.Pointer(&z))&^0xfff { + t.Error("C int* argument on stack") + } + if uintptr(unsafe.Pointer(&y))&^0xfff == uintptr(unsafe.Pointer(&z))&^0xfff { + t.Error("C intptr argument on stack") + } + if uintptr(unsafe.Pointer(&v))&^0xfff == uintptr(unsafe.Pointer(&z))&^0xfff { + t.Error("C void* argument on stack") + } + if uintptr(unsafe.Pointer(&si))&^0xfff == uintptr(unsafe.Pointer(&z))&^0xfff { + t.Error("C struct field pointer on stack") + } +} |