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go/analysis/passes/asmdecl: fix a panic under go1.10

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Now that asmdecl is not in the standard repo, we must not assume
that types.SizesFor knows about all architectures and panic if it
does not. This change makes it print a warning and assume 64-bit
norms.

Change-Id: Idacad350b2fc9343adfb32539fec7003b39380ed
Reviewed-on: https://go-review.googlesource.com/c/141679
Reviewed-by: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
Alan Donovan 2018-10-12 14:52:13 -04:00
parent d1d6d0cbb6
commit c0eb142035
1 changed files with 8 additions and 1 deletions
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9
go/analysis/passes/asmdecl/asmdecl.go
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@ -11,6 +11,7 @@ import (
"go/build"
"go/token"
"go/types"
"log"
"regexp"
"strconv"
"strings"
@ -107,7 +108,13 @@ func init() {
for _, arch := range arches {
arch.sizes = types.SizesFor("gc", arch.name)
if arch.sizes == nil {
panic("missing SizesFor for gc/" + arch.name)
// TODO(adonovan): fix: now that asmdecl is not in the standard
// library we cannot assume types.SizesFor is consistent with arches.
// For now, assume 64-bit norms and print a warning.
// But this warning should really be deferred until we attempt to use
// arch, which is very unlikely.
arch.sizes = types.SizesFor("gc", "amd64")
log.Printf("unknown architecture %s", arch.name)
}
arch.intSize = int(arch.sizes.Sizeof(types.Typ[types.Int]))
arch.ptrSize = int(arch.sizes.Sizeof(types.Typ[types.UnsafePointer]))