From the issue, which describes it as well as I could:
database/sql assumes that driver.Stmt.Close does not need the
connection.
see database/sql/sql.go:1308:
This puts the Rows' connection back into the idle pool, and
then calls the driver.Stmt.Close method of the Stmt it belongs
to. In the postgresql driver implementation
(https://github.com/lib/pq), Stmt.Close communicates with the
server (on the connection that was just put back into the idle
pool). Most of the time, this causes no problems, but if
another goroutine makes a query at the right (wrong?) time,
chaos results.
In any case, traffic is being sent on "free" connections
shortly after they are freed, leading to race conditions that
kill the driver code.
Fixes#5283
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8633044
They caused internal compiler errors and they're expensive enough that inlining them doesn't make sense.
Fixes#5259.
R=golang-dev, r, iant, remyoudompheng
CC=golang-dev
https://golang.org/cl/8636043
Debug output from go test -x may contain empty arguments.
This CL quotes arguments if needed. E.g. the output of
go test -x is now
.../6g -o ./_go_.6 -p testmain -complete -D "" -I . -I $WORK ./_testmain.go
which is easier to grasp.
R=golang-dev, bradfitz, minux.ma, r
CC=golang-dev
https://golang.org/cl/8633043
Debug output from go test -x may contain empty arguments.
This CL quotes arguments if needed. E.g. the output of
go test -x is now
.../6g -o ./_go_.6 -p testmain -complete -D "" -I . -I $WORK ./_testmain.go
which is easier to grasp.
R=golang-dev, bradfitz, minux.ma, r
CC=golang-dev
https://golang.org/cl/8633043
This will let us ask people to rebuild the Go system without
precise GC, and then rebuild and retest their program, to see
if precise GC is causing whatever problem they are having.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/8700043
UMTX_OP_WAIT expects that the address points to a uintptr, but
the code in lock_futex.c uses a uint32. UMTX_OP_WAIT_UINT is
just like UMTX_OP_WAIT, but the address points to a uint32.
This almost certainly makes no difference on a little-endian
system, but since the kernel supports it we should do the
right thing. And, who knows, maybe it matters.
R=golang-dev, bradfitz, r, ality
CC=golang-dev
https://golang.org/cl/8699043
Although one may argue that they should be legal, gc (at least)
disallows byte order marks that are not the first code point
in the file. Added a sentence to the "Implementation restriction"
clause in the "Source code representation" section to document
this better.
Lifting this restriction (again - the rule has changed at least
twice already) would not break any existing programs, should
we later decide yet again to fiddle the rules about these little
fly specks.
R=golang-dev, dsymonds, gri
CC=golang-dev
https://golang.org/cl/8649043
This change removes processing of #cgo directives from cmd/cgo,
pushing the onus back on cmd/go to pass all necessary flags.
Fixes#5224. See comments for rationale.
R=golang-dev, iant, r
CC=golang-dev
https://golang.org/cl/8610044
All symbols are currently marked with global scope.
The correct behavior was lost when the symbol table
format was changed.
R=golang-dev, iant, r
CC=golang-dev
https://golang.org/cl/8625043
The String method is called whenever the printing operation wants a string,
not just for %s and %v.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/8638043
If there are no tags, the rules are the same as before.
If there is a tagged field, choose it if there is exactly one
at the top level of all fields.
More tests. The old tests were clearly inadequate, since
they all pass as is. The new tests only work with the new code.
R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/8617044
Some variables declared in C could end up as undefined symbols
in the final binary and have null address.
Fixes#5114.
Fixes#5227.
R=golang-dev, iant, ajstarks, dave, r
CC=golang-dev
https://golang.org/cl/8602044
The old code was incorrect and also broken. It passed the tests by accident.
The new algorithm is:
1) Sort the fields in order of names.
2) For all fields with the same name, sort in increasing depth.
3) Choose the single field with shortest depth.
If any of the fields of a given name has a tag, do the above using
tagged fields of that name only.
Fixes#5245.
R=iant
CC=golang-dev
https://golang.org/cl/8583044
Makes it possible to return the spent runtime.PollDesc to
runtime.pollcache descriptor pool when netFD.connect or
syscall.Listen fails.
Fixes#5219.
R=dvyukov, dave, bradfitz, adg
CC=golang-dev
https://golang.org/cl/8318044
If the build key contains -race, the builder will invoke to the race.{bat,bash} build command. This allows {darwin,linux,windows}-amd64 builders to do race and non race builds in sequence.
R=adg, dvyukov, fullung
CC=golang-dev
https://golang.org/cl/8266046
cgo stores cgo LDFLAGS in _cgo_flags and _cgo_defun.c.
The _cgo_defun.c records the flags via
"#pragma cgo_ldflag <flag>", which external linking
relies upon for passing libraries (and search paths)
to the host linker.
The go command will allow LDFLAGS for cgo to be passed
through the environment (CGO_LDFLAGS); cgo ignores
this environment variable, and so its value doesn't
make it into the above mentioned files. This CL changes
cgo to record CGO_LDFLAGS also.
Fixes#5205.
R=iant, minux.ma
CC=golang-dev
https://golang.org/cl/8465043
The race detector uses a global lock to analyze atomic
operations. A panic in the middle of the code leaves the
lock acquired.
Similarly, the sync package may leave the race detectro
inconsistent when methods are called on nil pointers.
R=golang-dev, r, minux.ma, dvyukov, rsc, adg
CC=golang-dev
https://golang.org/cl/7981043
It's not trivial to make a comprehensive check
due to inferior pointers, reflect, gob, etc.
But this is essentially what I've used to debug
the GC issues.
Update #5193.
R=golang-dev, iant, 0xe2.0x9a.0x9b, r
CC=golang-dev
https://golang.org/cl/8455043
