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Hana (Hyang-Ah) Kim ba02264446 runtime/pprof: add a fake mapping when /proc/self/maps is unavailable Profile's Mapping field is currently populated by reading /proc/self/maps. On systems where /proc/self/maps is not available, the profile generated by Go's runtime will not have any Mapping entry. Pprof command then adds a fake entry and links all Location entries in the profile with the fake entry to be used during symbolization. `a8644067d5/internal/driver/fetch.go (L437)` The fake entry is not enough to suppress the error or warning messages pprof command produces. We need to tell pprof that Location entries are symbolized already by Go runtime and pprof does not have to attempt to perform further symbolization. In #25743, we made Go runtime mark Mapping entries with HasFunctions=true when all Location entries from the Mapping entries are successfully symbolized. This change makes the Go runtime add a fake mapping entry, otherwise the pprof command tool would add, and set the HasFunctions=true following the same logic taken when the real mapping information is available. Updates #19790. Fixes #26255. Tested pprof doesn't report the error message any more for pure Go program. Change-Id: Ib12b62e15073f5d6c80967e44b3e8709277c11bd Reviewed-on: https://go-review.googlesource.com/123779 Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>		2018-07-16 15:24:25 +00:00
.github	.github: use HTTPS for Stack Overflow link in SUPPORT.md	2018-06-12 11:08:14 +00:00
api	syscall: convert Windows AddrinfoW.Addr from uintptr to syscall.Pointer	2018-07-12 15:36:15 +00:00
doc	doc: update Design and Types sections of the FAQ	2018-07-15 09:19:41 +00:00
lib/time	lib/time: update vendored tzdata to release 2018e	2018-06-11 14:47:06 +00:00
misc	misc/cgo: fix test on iOS	2018-07-15 06:06:38 +00:00
src	runtime/pprof: add a fake mapping when /proc/self/maps is unavailable	2018-07-16 15:24:25 +00:00
test	cmd/compile: handle degenerate write barrier case	2018-07-12 19:06:09 +00:00
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.gitignore	.gitignore: ignore src/cmd/dist/dist	2017-10-28 21:55:49 +00:00
AUTHORS	A+C: add additional email address	2018-07-06 02:04:28 +00:00
CONTRIBUTING.md	all: restore changes from faulty merge/revert	2018-02-12 20:13:59 +00:00
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README.md

The Go Programming Language

Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.

Gopher image by Renee French, licensed under Creative Commons 3.0 Attributions license.

Our canonical Git repository is located at https://go.googlesource.com/go. There is a mirror of the repository at https://github.com/golang/go.

Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.

Download and Install

Binary Distributions

Official binary distributions are available at https://golang.org/dl/.

After downloading a binary release, visit https://golang.org/doc/install or load doc/install.html in your web browser for installation instructions.

Install From Source

If a binary distribution is not available for your combination of operating system and architecture, visit https://golang.org/doc/install/source or load doc/install-source.html in your web browser for source installation instructions.

Contributing

Go is the work of thousands of contributors. We appreciate your help!

To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html

Note that the Go project uses the issue tracker for bug reports and proposals only. See https://golang.org/wiki/Questions for a list of places to ask questions about the Go language.