80ec711755
A send on an unbuffered channel to a blocked receiver is the only case in the runtime where one goroutine writes directly to the stack of another. The garbage collector assumes that if a goroutine is blocked, its stack contains no new pointers since the last time it ran. The send on an unbuffered channel violates this, so it needs an explicit write barrier. It has an explicit write barrier, but not one that can handle a write to another stack. Use one that can (based on type bitmap instead of heap bitmap). To make this work, raise the limit for type bitmaps so that they are used for all types up to 64 kB in size (256 bytes of bitmap). (The runtime already imposes a limit of 64 kB for a channel element size.) I have been unable to reproduce this problem in a simple test program. Could help #11035. Change-Id: I06ad994032d8cff3438c9b3eaa8d853915128af5 Reviewed-on: https://go-review.googlesource.com/10815 Reviewed-by: Austin Clements <austin@google.com> |
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The Go Programming Language
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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:
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See https://golang.org/doc/install or doc/install.html for more details.