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cmd/compile: Fatal instead of panic in large bvbulkalloc

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This provides better diagnostics when it occurs.

Updates #19751

Change-Id: I87db54c22e1345891b418c1741dc76ac5fb8ed00
Reviewed-on: https://go-review.googlesource.com/39358
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2017-04-03 16:14:26 -07:00
parent 094498c9a1
commit 42426ed411
1 changed files with 5 additions and 1 deletions
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6
src/cmd/compile/internal/gc/bv.go
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@ -29,8 +29,12 @@ type bulkBvec struct {
func bvbulkalloc(nbit int32, count int32) bulkBvec {
nword := (nbit + WORDBITS - 1) / WORDBITS
size := int64(nword) * int64(count)
if int64(int32(size*4)) != size*4 {
Fatalf("bvbulkalloc too big: nbit=%d count=%d nword=%d size=%d", nbit, count, nword, size)
}
return bulkBvec{
words: make([]uint32, nword*count),
words: make([]uint32, size),
nbit: nbit,
nword: nword,
}