gcc/libgo
Ian Lance Taylor f6be1179bb runtime: prevent deadlock when profiling signal arrives during traceback
Traceback routines, e.g. callers and funcentry, may call
    __go_get_backtrace_state. If a profiling signal arrives while we
    are in the critical section of __go_get_backtrace_state, it tries
    to do a traceback, which also calls __go_get_backtrace_state,
    which tries to enter the same critical section and will deadlock.
    Prevent this deadlock by setting up runtime_in_callers before
    calling __go_get_backtrace_state.
    
    Found while investigating golang/go#29448. Will add a test in the
    next CL.
    
    Updates golang/go#29448.
    
    Reviewed-on: https://go-review.googlesource.com/c/156037

From-SVN: r267590
2019-01-05 00:40:04 +00:00
..
config re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
go runtime: delete export_arm_test.go 2018-12-27 16:34:50 +00:00
misc/cgo libgo: update to Go 1.11 2018-09-24 21:46:21 +00:00
runtime runtime: prevent deadlock when profiling signal arrives during traceback 2019-01-05 00:40:04 +00:00
testsuite re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
LICENSE LICENSE: separate, change PATENTS text. 2010-12-06 22:27:47 +00:00
MERGE libgo: update to Go 1.11.1 release 2018-10-08 14:21:30 +00:00
Makefile.am re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
Makefile.in re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
PATENTS LICENSE: separate, change PATENTS text. 2010-12-06 22:27:47 +00:00
README libgo/README: Minor updates. 2015-03-13 18:53:13 +00:00
README.gcc libgo/README.gcc: Mention GCCGO_RUN_ALL_TESTS. 2011-03-09 19:17:56 +00:00
VERSION libgo: update to Go 1.11.1 release 2018-10-08 14:21:30 +00:00
aclocal.m4 re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
check-packages.txt libgo: update to Go 1.11 2018-09-24 21:46:21 +00:00
config.h.in internal/bytealg: support systems that don't have memmem 2018-10-02 16:45:51 +00:00
configure re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
configure.ac re PR bootstrap/82856 (--enable-maintainter-mode broken by incompatiblity of gcc's required automake and modern Perl) 2018-10-31 20:46:17 +00:00
goarch.sh libgo: support x32 as GOARCH=amd64p32 GOOS=linux 2018-10-01 20:17:11 +00:00
godeps.sh libgo: update to Go1.10beta1 2018-01-09 01:23:08 +00:00
gotool-packages.txt libgo: update to Go 1.11 2018-09-24 21:46:21 +00:00
libgo-packages.txt libgo: update to Go 1.11 2018-09-24 21:46:21 +00:00
libgo.imp Big merge of changes to gofrontend repo that were postponed due to the 2017-05-10 17:26:09 +00:00
match.sh libgo: update to Go 1.11 2018-09-24 21:46:21 +00:00
merge.sh libgo: update to Go 1.11 2018-09-24 21:46:21 +00:00
mkrsysinfo.sh libgo: adapt Solaris 12 references 2017-11-14 14:26:04 +00:00
mkruntimeinc.sh libgo: refactor code to enumerate stdlib packages 2018-05-02 21:57:35 +00:00
mksigtab.sh libgo: don't use grep -q in mksigtab.sh 2017-11-22 00:27:29 +00:00
mksysinfo.sh syscall: always define WEXITED and WNOWAIT on GNU/Linux 2018-11-26 23:58:34 +00:00
mvifdiff.sh runtime: introduce mvifdiff.sh script to replace GCC's move-if-change 2014-12-01 01:06:29 +00:00
sysinfo.c syscall: remove Ustat 2018-06-22 14:25:52 +00:00

README

See ../README.

This is the runtime support library for the Go programming language.
This library is intended for use with the Go frontend.

This library should not be stripped when it is installed.  Go code
relies on being able to look up file/line information, which comes
from the debugging info using the libbacktrace library.

The library has only been tested on GNU/Linux using glibc, and on
Solaris.  It should not be difficult to port to other operating
systems.

Directories:

go
  A copy of the Go library from http://golang.org/, with several
  changes for gccgo.

runtime
  Runtime functions, written in C, which are called directly by the
  compiler or by the library.

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.