diff options
Diffstat (limited to 'src/cmd/compile/internal/noder/lex.go')
| -rw-r--r-- | src/cmd/compile/internal/noder/lex.go | 19 |
1 files changed, 7 insertions, 12 deletions
diff --git a/src/cmd/compile/internal/noder/lex.go b/src/cmd/compile/internal/noder/lex.go index 66a56a50ec..cef0f082ca 100644 --- a/src/cmd/compile/internal/noder/lex.go +++ b/src/cmd/compile/internal/noder/lex.go @@ -30,6 +30,7 @@ const ( ir.NoCheckPtr | ir.RegisterParams | // TODO(register args) remove after register abi is working ir.CgoUnsafeArgs | + ir.UintptrKeepAlive | ir.UintptrEscapes | ir.Systemstack | ir.Nowritebarrier | @@ -67,19 +68,13 @@ func pragmaFlag(verb string) ir.PragmaFlag { return ir.Yeswritebarrierrec case "go:cgo_unsafe_args": return ir.CgoUnsafeArgs | ir.NoCheckPtr // implies NoCheckPtr (see #34968) + case "go:uintptrkeepalive": + return ir.UintptrKeepAlive case "go:uintptrescapes": - // For the next function declared in the file - // any uintptr arguments may be pointer values - // converted to uintptr. This directive - // ensures that the referenced allocated - // object, if any, is retained and not moved - // until the call completes, even though from - // the types alone it would appear that the - // object is no longer needed during the - // call. The conversion to uintptr must appear - // in the argument list. - // Used in syscall/dll_windows.go. - return ir.UintptrEscapes + // This directive extends //go:uintptrkeepalive by forcing + // uintptr arguments to escape to the heap, which makes stack + // growth safe. + return ir.UintptrEscapes | ir.UintptrKeepAlive // implies UintptrKeepAlive case "go:registerparams": // TODO(register args) remove after register abi is working return ir.RegisterParams case "go:notinheap": |