9490b8da72
PR go/60931 runtime: Fix garbage collector issue with non 4kB system page size The go garbage collector tracks memory in terms of 4kB pages. Most of the code checks getpagesize() at runtime and does the right thing. On a 64kB ppc64 box I see SEGVs in long running processes which has been diagnosed as a bug in scavengelist. scavengelist does a madvise(MADV_DONTNEED) without rounding the arguments to the system page size. A strace of one of the failures shows the problem: madvise(0xc211030000, 4096, MADV_DONTNEED) = 0 The kernel rounds the length up to 64kB and we mark 60kB of valid data as no longer needed. Round start up to a system page and end down before calling madvise. From-SVN: r209777 |
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config | ||
go | ||
runtime | ||
testsuite | ||
aclocal.m4 | ||
config.h.in | ||
configure | ||
configure.ac | ||
godeps.sh | ||
LICENSE | ||
Makefile.am | ||
Makefile.in | ||
MERGE | ||
merge.sh | ||
mksysinfo.sh | ||
PATENTS | ||
README | ||
README.gcc |
See ../README. This is the runtime support library for the Go programming language. This library is intended for use with the Go frontend. The library has only been tested on GNU/Linux using glibc. It should not be difficult to port to other operating systems. The library has only been tested on x86/x86_64 systems. It should not be difficult to port to other architectures. Directories: go A copy of the Go library from http://golang.org/, with a few changes for gccgo. Notably, the reflection interface is different. runtime Runtime functions, written in C, which are called directly by the compiler or by the library. syscalls System call support. Contributing ============ To contribute patches to the files in this directory, please see http://golang.org/doc/gccgo_contribute.html . The master copy of these files is hosted at http://code.google.com/p/gofrontend . Changes to these files require signing a Google contributor license agreement. If you are the copyright holder, you will need to agree to the individual contributor license agreement at http://code.google.com/legal/individual-cla-v1.0.html. This agreement can be completed online. If your organization is the copyright holder, the organization will need to agree to the corporate contributor license agreement at http://code.google.com/legal/corporate-cla-v1.0.html. If the copyright holder for your code has already completed the agreement in connection with another Google open source project, it does not need to be completed again.