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cmd/compile: when GOSSAFUNC is set, dump the current pass on crash

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When an SSA pass ICEs, it calls f.Fatalf, which terminates the
compiler. When GOSSAFUNC is set, the current pass is not written
to ssa.html. This CL makes it write ssa.html when it calls Fatalf,
for the ease of debugging.

Change-Id: I5d55e4258f0693d89c48c0a84984f2f893b0811d
Reviewed-on: https://go-review.googlesource.com/c/go/+/307509
Trust: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Cherry Zhang 2021-04-05 20:41:56 -04:00
parent 939b561a6e
commit b345a306a0
1 changed files with 13 additions and 1 deletions
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14
src/cmd/compile/internal/ssa/func.go
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@ -653,7 +653,19 @@ func (f *Func) Frontend() Frontend { return f.f
func (f *Func) Warnl(pos src.XPos, msg string, args ...interface{}) { f.fe.Warnl(pos, msg, args...) }
func (f *Func) Logf(msg string, args ...interface{}) { f.fe.Logf(msg, args...) }
func (f *Func) Log() bool { return f.fe.Log() }
func (f *Func) Fatalf(msg string, args ...interface{}) { f.fe.Fatalf(f.Entry.Pos, msg, args...) }
func (f *Func) Fatalf(msg string, args ...interface{}) {
stats := "crashed"
if f.Log() {
f.Logf(" pass %s end %s\n", f.pass.name, stats)
printFunc(f)
}
if f.HTMLWriter != nil {
f.HTMLWriter.WritePhase(f.pass.name, fmt.Sprintf("%s <span class=\"stats\">%s</span>", f.pass.name, stats))
f.HTMLWriter.flushPhases()
}
f.fe.Fatalf(f.Entry.Pos, msg, args...)
}
// postorder returns the reachable blocks in f in a postorder traversal.
func (f *Func) postorder() []*Block {