Adding upstream version 1.20.14.upstream/1.20.14upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 30 insertions, 0 deletions

diff --git a/src/runtime/pprof/proto_other.go b/src/runtime/pprof/proto_other.go
new file mode 100644
index 0000000..4a7fe79
--- /dev/null
+++ b/src/runtime/pprof/proto_other.go
@@ -0,0 +1,30 @@
+// Copyright 2022 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.
+
+//go:build !windows
+
+package pprof
+
+import (
+	"errors"
+	"os"
+)
+
+// readMapping reads /proc/self/maps and writes mappings to b.pb.
+// It saves the address ranges of the mappings in b.mem for use
+// when emitting locations.
+func (b *profileBuilder) readMapping() {
+	data, _ := os.ReadFile("/proc/self/maps")
+	parseProcSelfMaps(data, b.addMapping)
+	if len(b.mem) == 0 { // pprof expects a map entry, so fake one.
+		b.addMappingEntry(0, 0, 0, "", "", true)
+		// TODO(hyangah): make addMapping return *memMap or
+		// take a memMap struct, and get rid of addMappingEntry
+		// that takes a bunch of positional arguments.
+	}
+}
+
+func readMainModuleMapping() (start, end uint64, err error) {
+	return 0, 0, errors.New("not implemented")
+}