34c480afa8
The runtime.typeEquals function is used during typelinksinit to determine the canonical set of *_type values to use throughout the runtime. As such, it is run against non-canonical *_type values, that is, types from modules that are duplicates of a type from another module that was loaded earlier in the program life. These non-canonical *_type values sometimes contain pointers. These pointers are pointing to position-independent data, and so they are set by ld.so using dynamic relocations when the module is loaded. As such, the pointer can point to the equivalent memory from a previous module. This means if typesEqual follows a pointer inside a *_type, it can end up at a piece of memory from another module. If it reads a typeOff or nameOff from that memory and attempts to resolve it against the non-canonical *_type from the later module, it will end up with a reference to junk memory. Instead, resolve against the pointer the offset was read from, so the data is valid. Fixes #17709. Should no longer matter after #17724 is resolved in a later Go. Change-Id: Ie88b151a3407d82ac030a97b5b6a19fc781901cb Reviewed-on: https://go-review.googlesource.com/32513 Run-TryBot: David Crawshaw <crawshaw@golang.org> Reviewed-by: Keith Randall <khr@golang.org> |
||
---|---|---|
.github | ||
api | ||
doc | ||
lib/time | ||
misc | ||
src | ||
test | ||
.gitattributes | ||
.gitignore | ||
AUTHORS | ||
CONTRIBUTING.md | ||
CONTRIBUTORS | ||
favicon.ico | ||
LICENSE | ||
PATENTS | ||
README.md | ||
robots.txt |
The Go Programming Language
Go is an open source programming language that makes it easy to build simple, reliable, and efficient software.
For documentation about how to install and use Go, visit https://golang.org/ or load doc/install-source.html in your web browser.
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.
Go is the work of hundreds of contributors. We appreciate your help!
To contribute, please read the contribution guidelines: https://golang.org/doc/contribute.html
Note that we do not accept pull requests and that we use the issue tracker for bug reports and proposals only. Please ask questions on https://forum.golangbridge.org or https://groups.google.com/forum/#!forum/golang-nuts.
Unless otherwise noted, the Go source files are distributed under the BSD-style license found in the LICENSE file.
--
Binary Distribution Notes
If you have just untarred a binary Go distribution, you need to set the environment variable $GOROOT to the full path of the go directory (the one containing this file). You can omit the variable if you unpack it into /usr/local/go, or if you rebuild from sources by running all.bash (see doc/install-source.html). You should also add the Go binary directory $GOROOT/bin to your shell's path.
For example, if you extracted the tar file into $HOME/go, you might put the following in your .profile:
export GOROOT=$HOME/go
export PATH=$PATH:$GOROOT/bin
See https://golang.org/doc/install or doc/install.html for more details.