diff options
| author | Michael Knyszek <mknyszek@google.com> | 2022-10-19 14:51:15 -0400 |
|---|---|---|
| committer | Michael Knyszek <mknyszek@google.com> | 2022-11-18 03:45:30 +0000 |
| commit | e4435cb8448514d2413f9d9aa3ee40738d26fd67 (patch) | |
| tree | a4ada76626bb11adbe2b48ddd88ace8cb8304816 /src/runtime/runtime2.go | |
| parent | 0613418c9865bb3fb04e26822f3d4f4a317a2540 (diff) | |
| download | go-e4435cb8448514d2413f9d9aa3ee40738d26fd67.tar.xz | |
runtime: add page tracer
This change adds a new GODEBUG flag called pagetrace that writes a
low-overhead trace of how pages of memory are managed by the Go runtime.
The page tracer is kept behind a GOEXPERIMENT flag due to a potential
security risk for setuid binaries.
Change-Id: I6f4a2447d02693c25214400846a5d2832ad6e5c0
Reviewed-on: https://go-review.googlesource.com/c/go/+/444157
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: David Chase <drchase@google.com>
Run-TryBot: Michael Knyszek <mknyszek@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Diffstat (limited to 'src/runtime/runtime2.go')
| -rw-r--r-- | src/runtime/runtime2.go | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/runtime/runtime2.go b/src/runtime/runtime2.go index ceb6ff66e2..9381d1e3f7 100644 --- a/src/runtime/runtime2.go +++ b/src/runtime/runtime2.go @@ -754,6 +754,11 @@ type p struct { // scheduler ASAP (regardless of what G is running on it). preempt bool + // pageTraceBuf is a buffer for writing out page allocation/free/scavenge traces. + // + // Used only if GOEXPERIMENT=pagetrace. + pageTraceBuf pageTraceBuf + // Padding is no longer needed. False sharing is now not a worry because p is large enough // that its size class is an integer multiple of the cache line size (for any of our architectures). } |