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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 13:14:23 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-28 13:14:23 +0000 |
commit | 73df946d56c74384511a194dd01dbe099584fd1a (patch) | |
tree | fd0bcea490dd81327ddfbb31e215439672c9a068 /src/runtime/pprof/runtime.go | |
parent | Initial commit. (diff) | |
download | golang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.tar.xz golang-1.16-73df946d56c74384511a194dd01dbe099584fd1a.zip |
Adding upstream version 1.16.10.upstream/1.16.10upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/runtime/pprof/runtime.go')
-rw-r--r-- | src/runtime/pprof/runtime.go | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/src/runtime/pprof/runtime.go b/src/runtime/pprof/runtime.go new file mode 100644 index 0000000..dd2545b --- /dev/null +++ b/src/runtime/pprof/runtime.go @@ -0,0 +1,41 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package pprof + +import ( + "context" + "unsafe" +) + +// runtime_expandFinalInlineFrame is defined in runtime/symtab.go. +func runtime_expandFinalInlineFrame(stk []uintptr) []uintptr + +// runtime_setProfLabel is defined in runtime/proflabel.go. +func runtime_setProfLabel(labels unsafe.Pointer) + +// runtime_getProfLabel is defined in runtime/proflabel.go. +func runtime_getProfLabel() unsafe.Pointer + +// SetGoroutineLabels sets the current goroutine's labels to match ctx. +// A new goroutine inherits the labels of the goroutine that created it. +// This is a lower-level API than Do, which should be used instead when possible. +func SetGoroutineLabels(ctx context.Context) { + ctxLabels, _ := ctx.Value(labelContextKey{}).(*labelMap) + runtime_setProfLabel(unsafe.Pointer(ctxLabels)) +} + +// Do calls f with a copy of the parent context with the +// given labels added to the parent's label map. +// Goroutines spawned while executing f will inherit the augmented label-set. +// Each key/value pair in labels is inserted into the label map in the +// order provided, overriding any previous value for the same key. +// The augmented label map will be set for the duration of the call to f +// and restored once f returns. +func Do(ctx context.Context, labels LabelSet, f func(context.Context)) { + defer SetGoroutineLabels(ctx) + ctx = WithLabels(ctx, labels) + SetGoroutineLabels(ctx) + f(ctx) +} |