diff options
| author | Keith Randall <khr@golang.org> | 2023-08-10 15:07:43 -0700 |
|---|---|---|
| committer | Keith Randall <khr@google.com> | 2023-08-11 20:24:56 +0000 |
| commit | 1f4bb6112bdab6c0320b1ecd28a7da79cf8b74e0 (patch) | |
| tree | 29f79e0e1dadef80efc41b2b9ef773bbce8929a1 /src/runtime/export_test.go | |
| parent | 3378adc517f362793acec5adc6cc17f9a1841a4c (diff) | |
| download | go-1f4bb6112bdab6c0320b1ecd28a7da79cf8b74e0.tar.xz | |
runtime: test that write barriers are correctly marked unpreemptible
Followon to CL 518055.
Change-Id: I05c4b429f49feb7012070e467fefbf3392260915
Reviewed-on: https://go-review.googlesource.com/c/go/+/518538
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Keith Randall <khr@google.com>
Diffstat (limited to 'src/runtime/export_test.go')
| -rw-r--r-- | src/runtime/export_test.go | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/runtime/export_test.go b/src/runtime/export_test.go index a4a1fa580d..bc08b2333c 100644 --- a/src/runtime/export_test.go +++ b/src/runtime/export_test.go @@ -7,6 +7,7 @@ package runtime import ( + "internal/abi" "internal/goarch" "internal/goos" "runtime/internal/atomic" @@ -1940,3 +1941,21 @@ func MyGenericFunc[T any]() { testUintptr = 4 }) } + +func UnsafePoint(pc uintptr) bool { + fi := findfunc(pc) + v := pcdatavalue(fi, abi.PCDATA_UnsafePoint, pc, nil) + switch v { + case abi.UnsafePointUnsafe: + return true + case abi.UnsafePointSafe: + return false + case abi.UnsafePointRestart1, abi.UnsafePointRestart2, abi.UnsafePointRestartAtEntry: + // These are all interruptible, they just encode a nonstandard + // way of recovering when interrupted. + return false + default: + var buf [20]byte + panic("invalid unsafe point code " + string(itoa(buf[:], uint64(v)))) + } +} |