[dev.fuzz] internal/fuzz: fix two bugs in BenchmarkWorkerFuzzOverhead

* The exec count must be set to 0 before calling
  workerServer.fuzz. This was causing fuzz to run indefinitely after
  the first benchmark iteration, since it wouldn't hit the termination
  condition of being equal to fuzzArgs.Limit.
* Added an assertion that the count must be lower than fuzzArgs.Limit
  at the beginning of workerServer.fuzz.
* Also closed and deleted shared memory at the end of each benchmark run.

Change-Id: Iab465f8a4997ebd652aec04d0ff9bb60b802829e
Reviewed-on: https://go-review.googlesource.com/c/go/+/334129
Trust: Jay Conrod <jayconrod@google.com>
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Jay Conrod <jayconrod@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
2 files changed
tree: 65a5da7320a798174f24005e2e5418eea847a2df
  1. .github/
  2. api/
  3. doc/
  4. lib/
  5. misc/
  6. src/
  7. test/
  8. .gitattributes
  9. .gitignore
  10. AUTHORS
  11. codereview.cfg
  12. CONTRIBUTING.md
  13. CONTRIBUTORS
  14. LICENSE
  15. PATENTS
  16. README.md
  17. SECURITY.md
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