db56a63547
runfinq allocates a stack frame on the heap for constructing the finalizer function calls and reuses it for each call. However, because the type of this frame is constantly shifting, it tells mallocgc there are no pointers in it and it acts essentially like uninitialized memory between uses. But runfinq uses pointer writes with write barriers to "initialize" this memory, which is not going to be safe with the hybrid barrier, since the hybrid barrier may see a stale pointer left in the "uninitialized" frame. Fix this by zero-initializing the argument values in the frame before writing the argument pointers. Updates #17503. Change-Id: I951c0a2be427eb9082a32d65c4410e6fdef041be Reviewed-on: https://go-review.googlesource.com/31453 Reviewed-by: Rick Hudson <rlh@golang.org> |
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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.
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--
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.