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author | Dan Scales <danscales@google.com> | 2019-09-23 17:46:38 -0700 |
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committer | Dan Scales <danscales@google.com> | 2019-09-25 23:27:16 +0000 |
commit | 225f484c880a840046129f16102216ee29271e66 (patch) | |
tree | fdf43712239f32fe62e988f3b4033f1f924eb741 /src/runtime/runtime_test.go | |
parent | 8c99e45ef956be18677d862fd64d1ba5346ce403 (diff) | |
download | go-225f484c880a840046129f16102216ee29271e66.tar.gz go-225f484c880a840046129f16102216ee29271e66.zip |
misc, runtime, test: extra tests and benchmarks for defer
Add a bunch of extra tests and benchmarks for defer, in preparation for new
low-cost (open-coded) implementation of defers (see #34481),
- New file defer_test.go that tests a bunch more unusual defer scenarios,
including things that might have problems for open-coded defers.
- Additions to callers_test.go actually verifying what the stack trace looks like
for various panic or panic-recover scenarios.
- Additions to crash_test.go testing several more crash scenarios involving
recursive panics.
- New benchmark in runtime_test.go measuring speed of panic-recover
- New CGo benchmark in cgo_test.go calling from Go to C back to Go that
shows defer overhead
Updates #34481
Change-Id: I423523f3e05fc0229d4277dd00073289a5526188
Reviewed-on: https://go-review.googlesource.com/c/go/+/197017
Run-TryBot: Dan Scales <danscales@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Diffstat (limited to 'src/runtime/runtime_test.go')
-rw-r--r-- | src/runtime/runtime_test.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/runtime/runtime_test.go b/src/runtime/runtime_test.go index 5ea9cbd88a..37eacfea64 100644 --- a/src/runtime/runtime_test.go +++ b/src/runtime/runtime_test.go @@ -122,6 +122,21 @@ func BenchmarkDeferMany(b *testing.B) { } } +func BenchmarkPanicRecover(b *testing.B) { + for i := 0; i < b.N; i++ { + defer3() + } +} + +func defer3() { + defer func(x, y, z int) { + if recover() == nil { + panic("failed recover") + } + }(1, 2, 3) + panic("hi") +} + // golang.org/issue/7063 func TestStopCPUProfilingWithProfilerOff(t *testing.T) { SetCPUProfileRate(0) |