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author | Dan Willemsen <dwillemsen@google.com> | 2016-08-16 14:38:16 -0700 |
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committer | Dan Willemsen <dwillemsen@google.com> | 2016-08-16 14:38:16 -0700 |
commit | 4c4fc748452a8a79e9d070a0b8df0fc0b6297031 (patch) | |
tree | 527c0549bc2ae68fc500fd544adbda2c39703390 /test | |
parent | 0c15709165b7a6466cf121b3333ffa4386796b51 (diff) | |
download | platform_prebuilts_go_linux-x86-4c4fc748452a8a79e9d070a0b8df0fc0b6297031.tar.gz platform_prebuilts_go_linux-x86-4c4fc748452a8a79e9d070a0b8df0fc0b6297031.tar.bz2 platform_prebuilts_go_linux-x86-4c4fc748452a8a79e9d070a0b8df0fc0b6297031.zip |
Update prebuilts to go1.7 ab/3151923
toolchain/go sha a31456e050
Change-Id: I21a58e6f1f449ccafc2a66a7ae64a8fdb2fd66f9
Diffstat (limited to 'test')
-rw-r--r-- | test/fixedbugs/issue16515.go | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/test/fixedbugs/issue16515.go b/test/fixedbugs/issue16515.go new file mode 100644 index 00000000..6b674363 --- /dev/null +++ b/test/fixedbugs/issue16515.go @@ -0,0 +1,53 @@ +// run + +// Copyright 2016 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 16515: spilled Duff-adjusted address may be invalid + +package main + +import "runtime" + +type T [62]int // DUFFZERO with non-zero adjustment on AMD64 + +var sink interface{} + +//go:noinline +func zero(x *T) { + // Two DUFFZEROs on the same address with a function call in between. + // Duff-adjusted address will be spilled and loaded + + *x = T{} // DUFFZERO + runtime.GC() + (*x)[0] = 1 + g() // call a function with large frame, trigger a stack move + *x = T{} // DUFFZERO again +} + +//go:noinline +// a function with large frame +func g() { + var x [1000]int + _ = x +} + +func main() { + var s struct { a T; b [8192-62]int } // allocate 64K, hopefully it's in a new span and a few bytes before it is garbage + sink = &s // force heap allocation + s.a[0] = 2 + zero(&s.a) + if s.a[0] != 0 { + println("s.a[0] =", s.a[0]) + panic("zeroing failed") + } + + var a T // on stack + a[0] = 2 + zero(&a) + if a[0] != 0 { + println("a[0] =", a[0]) + panic("zeroing failed") + } +} |