Add missing write barrier when initializing state
for newly created goroutine. Add write barrier for
same slot when preempting a goroutine.
Disable write barrier during goroutine death,
because dopanic does pointer writes.
With concurrent mark enabled (not in this CL), all.bash passed once.
The second time, TestGoexitCrash-2 failed.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://golang.org/cl/167610043
To turn concurrent gc on alter the if false in func gogc
currently at line 489 in malloc.go
LGTM=rsc
R=rsc
CC=golang-codereviews, rlh
https://golang.org/cl/172190043
Manifested as increased memory usage in a Google production system.
Not an unbounded leak, but can significantly increase the number
of sudogs allocated between garbage collections.
I checked all the other calls to acquireSudog.
This is the only one that was missing a releaseSudog.
LGTM=r, dneil
R=dneil, r
CC=golang-codereviews
https://golang.org/cl/169260043
These are being built into the runtime/cgo for every
operating system. It doesn't seem to matter, but
restore the Go 1.3 behavior anyway.
LGTM=r
R=r, dave
CC=golang-codereviews
https://golang.org/cl/171290043
This was a mistake. The cmd/api tool
depends on an old version of go/types.
««« original CL description
cmd/api: use golang.org/x/... import paths
LGTM=bradfitz, rsc
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/169000043
»»»
TBR=rsc, bradfitz
R=bradfitz, rsc
CC=golang-codereviews
https://golang.org/cl/169320043
This was a mistake; the cmd/api tool
depends on an old version of go/types.
««« original CL description
cmd/api: bump go.tools golden CL hash
TBR=bradfitz
R=rsc
CC=golang-codereviews
https://golang.org/cl/166380043
»»»
TBR=bradfitz, rsc
R=bradfitz, rsc
CC=golang-codereviews
https://golang.org/cl/167430043
I've Mercurial version 3.2 and hg submit fails with:
File "/home/agl/devel/go/lib/codereview/codereview.py", line 3567, in get_hg_status
ret = hg_commands.status(fui, self.repo, *[], **{'rev': [rev], 'copies': True})
File "/usr/lib/python2.7/site-packages/mercurial/commands.py", line 5714, in status
fm = ui.formatter('status', opts)
File "/home/agl/devel/go/lib/codereview/codereview.py", line 3464, in formatter
return plainformatter(self, topic, opts)
File "/usr/lib/python2.7/site-packages/mercurial/formatter.py", line 57, in __init__
if ui.debugflag:
AttributeError: 'FakeMercurialUI' object has no attribute 'debugflag'
This change dumbly adds a boolean debugflag and that seems to work.
LGTM=minux
R=rsc, minux
CC=golang-codereviews
https://golang.org/cl/167410043
New detection because of net/http now using TestMain.
Fixes#9033
LGTM=iant
R=golang-codereviews, iant
CC=adg, golang-codereviews, rsc
https://golang.org/cl/170210043
This was missing from CL 167320043.
Happy to apply comments in a followup.
TBR to fix build.
TBR=r
CC=golang-codereviews
https://golang.org/cl/171260043
Moving so that new Go 1.4 pprof can use it.
The old 'GNU objdump workalike' mode for 'go tool objdump'
is now gone, as are the tests for that mode. It was used only
by pre-Go 1.4 pprof. You can still specify an address range on
the command line; you just get the same output format as
you do when dumping the entire binary (without an address
limitation).
LGTM=r
R=r
CC=golang-codereviews, iant
https://golang.org/cl/167320043
People viewing this locally will not have a /s/ on their local godoc.
tip.golang.org doesn't have one either.
Also change all golang.org links to https, to avoid mixed content
warnings when viewing https://golang.org/.
Fixes#9028.
LGTM=bradfitz, r
R=r, bradfitz
CC=adg, golang-codereviews
https://golang.org/cl/168250043
The remaining run-only tests will be migrated to run.go in another CL.
This CL will break the build due to issues 8746 and 8806.
Update #4139
Update #8746
Update #8806
LGTM=rsc
R=rsc, bradfitz, iant
CC=golang-codereviews
https://golang.org/cl/144630044
Stack bitmaps need to be scanned past any BitsDead entries.
Object bitmaps will not have any BitsDead in them (bitmap extraction stops at
the first BitsDead entry in makeheapobjbv). data/bss bitmaps also have no BitsDead entries.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/168270043
For some reason lsof is now hanging on my workstation
without the -b (avoid blocking in the kernel) option.
Adding -b makes the test pass and shouldn't hurt.
I don't know how recent the -b option is. If the builders
are ok with it, it's probably ok.
LGTM=rsc
R=golang-codereviews, bradfitz, rsc
CC=golang-codereviews
https://golang.org/cl/166220043
Gentraceback may grow the stack.
One of the gentraceback wrappers may grow the stack.
One of the gentraceback callback calls may grow the stack.
Various stack pointers are stored in various stack locations
as type uintptr during the execution of these calls.
If the stack does grow, these stack pointers will not be
updated and will start trying to decode stack memory that
is no longer valid.
It may be possible to change the type of the stack pointer
variables to be unsafe.Pointer, but that's pretty subtle and
may still have problems, even if we catch every last one.
An easier, more obviously correct fix is to require that
gentraceback of the currently running goroutine must run
on the g0 stack, not on the goroutine's own stack.
Not doing this causes faults when you set
StackFromSystem = 1
StackFaultOnFree = 1
The new check in gentraceback will catch future lapses.
The more general problem is calling getcallersp but then
calling a function that might relocate the stack, which would
invalidate the result of getcallersp. Add note to stubs.go
declaration of getcallersp explaining the problem, and
check all existing calls to getcallersp. Most needed fixes.
This affects Callers, Stack, and nearly all the runtime
profiling routines. It does not affect stack copying directly
nor garbage collection.
LGTM=khr
R=khr, bradfitz
CC=golang-codereviews, r
https://golang.org/cl/167060043
The new rules for split functions mean that we are exposed
to the common bug of a function that loops forever at EOF.
Pick these off by shutting down the scanner if too many
consecutive empty tokens are delivered.
Fixes#9020.
LGTM=rsc, adg
R=golang-codereviews, rsc, adg, bradfitz
CC=golang-codereviews
https://golang.org/cl/169970043
The test intended to skip direct calls when creating
registerization variables was testing p->to.type instead of
p->to.name, so it always failed, causing regopt to create
unnecessary variables for these names.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/169110043
Now each C printf, Go print, or Go println is guaranteed
not to be interleaved with other calls of those functions.
This should help when debugging concurrent failures.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://golang.org/cl/169120043
- Some sequencing issues with stopping the first gc_m round
at the right place to set up correctly for the second round.
- atomicxor8 is not idempotent; avoid xor.
- Maintain BitsDead type bits correctly; see long comment added.
- Enable checkmark phase by default for now.
LGTM=rlh
R=rlh
CC=golang-codereviews
https://golang.org/cl/171090043
This adds an independent mark phase to the GC that can be used to
verify the the default concurrent mark phase has found all reachable
objects. It uses the upper 2 bits of the boundary nibble to encode
the mark leaving the lower bits to encode the boundary and the
normal mark bit.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/167130043
One failing case this removes is:
var bytes = []byte("hello, world")
var copy_bytes = bytes
We could handle this in the compiler, but it requires special
case for a variable that is initialized to the value of a
variable that is initialized to a string literal converted to
[]byte. This seems an unlikely case--it never occurs in the
standrd library--and it seems unnecessary to write the code to
handle it.
If we do want to support this case, one approach is
https://golang.org/cl/171840043.
The other failing cases are of the form
var bx bool
var copy_bx = bx
The compiler used to initialize copy_bx to false. However,
that led to issue 7665, since bx may be initialized in non-Go
code. The compiler no longer assumes that bx must be false,
so copy_bx can not be statically initialized.
We can fix these with https://golang.org/cl/169040043
if we also pass -complete to the compiler as part of this
test. This is OK but it's too late in the release cycle.
Fixes#8746.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/165400043
The check for unknown command line debug flags in gc was
incorrect: the loop over debugtab terminates when it reaches a
nil entry, but it was only reporting an error if the parser
had passed the last entry of debugtab (which it never did).
Fix this by reporting the usage error if the loop reaches a
nil entry.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/166110043
(The assertion depends on a per-package gensym counter whose
value varies based on what else is in the package.)
LGTM=khr
R=khr, rsc
CC=golang-codereviews
https://golang.org/cl/169930043
Previously, the flags argument to mallocgc was an int in Go,
but a uint32 in C. Change the Go type to use uint32 so these
agree. The largest flag value is 2 (and of course no flag
values are negative), so this won't change anything on little
endian architectures, but it matters on big endian.
LGTM=rsc
R=khr, rsc
CC=golang-codereviews
https://golang.org/cl/169920043
On heavily loaded build servers, a 5 second timeout is too aggressive,
which causes this test to fail spuriously.
LGTM=iant
R=iant
CC=golang-codereviews, sqweek
https://golang.org/cl/170850043
