From: Roland Shoemaker <roland@golang.org>
Date: Thu, 2 Sep 2021 21:38:58 +0000 (-0700)
Subject: [dev.fuzz] internal/fuzz: maintain debug info during minimization
X-Git-Tag: go1.18beta1~1282^2~19
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=9c56a64673d2f458e28c603f95b4efb5d39beef2;p=gostls13.git

[dev.fuzz] internal/fuzz: maintain debug info during minimization

Change-Id: I70c0229e43dfe37f70b9c79c2e6fe88d7b8d7bd0
Reviewed-on: https://go-review.googlesource.com/c/go/+/347231
Trust: Roland Shoemaker <roland@golang.org>
Run-TryBot: Roland Shoemaker <roland@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Jay Conrod <jayconrod@google.com>
---

diff --git a/src/internal/fuzz/fuzz.go b/src/internal/fuzz/fuzz.go
index 722933a0bf..5b940e4929 100644
--- a/src/internal/fuzz/fuzz.go
+++ b/src/internal/fuzz/fuzz.go
@@ -341,10 +341,11 @@ func CoordinateFuzzing(ctx context.Context, opts CoordinateFuzzingOpts) (err err
 					if printDebugInfo() {
 						fmt.Fprintf(
 							c.opts.Log,
-							"DEBUG worker reported interesting input that doesn't expand coverage, elapsed: %s, id: %s, parent: %s\n",
+							"DEBUG worker reported interesting input that doesn't expand coverage, elapsed: %s, id: %s, parent: %s, minimized: %t\n",
 							time.Since(c.startTime),
 							result.entry.Name,
 							result.entry.Parent,
+							result.minimizeAttempted,
 						)
 					}
 				}
diff --git a/src/internal/fuzz/worker.go b/src/internal/fuzz/worker.go
index 2f5704094e..32b13662c8 100644
--- a/src/internal/fuzz/worker.go
+++ b/src/internal/fuzz/worker.go
@@ -1017,6 +1017,11 @@ func (wc *workerClient) minimize(ctx context.Context, entryIn CorpusEntry, args
 		return CorpusEntry{}, minimizeResponse{}, errSharedMemClosed
 	}
 	entryOut.Data = mem.valueCopy()
+	h := sha256.Sum256(entryOut.Data)
+	name := fmt.Sprintf("%x", h[:4])
+	entryOut.Name = name
+	entryOut.Parent = entryIn.Parent
+	entryOut.Generation = entryIn.Generation
 	resp.Count = mem.header().count
 
 	return entryOut, resp, callErr