[go] Initialise (most) debug settings much earlier in startup process

[Gopher Robot (Gerrit)]

Gopher Robot submitted the change

Change information

Commit message:

runtime: initialise debug settings much earlier in startup process

This is necessary specifically to set the value of `debug.decoratemappings`
sufficiently early in the startup sequence that all memory ranges allocated
can be named appropriately using the new Linux-specific naming API
introduced in #71546.

Example output (on ARM64):
https://gist.github.com/9muir/3667654b9c3f52e8be92756219371672

Fixes: #75324

Change-Id: Ic0b16233f54a45adef1660c4d0df59af2f5af86a

Reviewed-on: https://go-review.googlesource.com/c/go/+/703476

Auto-Submit: Michael Knyszek <mkny...@google.com>

LUCI-TryBot-Result: Go LUCI <golang...@luci-project-accounts.iam.gserviceaccount.com>

Reviewed-by: Michael Knyszek <mkny...@google.com>

Files:

• A src/runtime/decoratemappings_test.go
• M src/runtime/export_test.go
• M src/runtime/proc.go
• M src/runtime/runtime1.go
• M src/runtime/set_vma_name_linux.go
• M src/runtime/set_vma_name_stub.go

Change size: M

Delta: 6 files changed, 109 insertions(+), 14 deletions(-)

Branch: refs/heads/master

Submit Requirements:

• Code-Review: +2 by Michael Knyszek
• TryBots-Pass: LUCI-TryBot-Result+1 by Go LUCI

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Gerrit

Gerrit-MessageType: merged

Gerrit-Project: go

Gerrit-Branch: master

Gerrit-Change-Id: Ic0b16233f54a45adef1660c4d0df59af2f5af86a

Gerrit-Change-Number: 703476

Gerrit-PatchSet: 15

Gerrit-Owner: Steve Muir <sjm...@google.com>

Gerrit-Reviewer: Carlos Amedee <car...@golang.org>

Gerrit-Reviewer: Go LUCI <golang...@luci-project-accounts.iam.gserviceaccount.com>

Gerrit-Reviewer: Gopher Robot <go...@golang.org>

Gerrit-Reviewer: Ian Lance Taylor <ia...@golang.org>

Gerrit-Reviewer: Michael Knyszek <mkny...@google.com>

Gerrit-Reviewer: Steve Muir <sjm...@google.com>