dump/fdump is a reflection-based data structure dumper slightly
customized for the compiler's Node data structure. It dumps the
transitivle closure of Node (and other) data structures using a
recursive descent depth first traversal and permits filtering
options (recursion depth limitation, filtering of struct fields).
I have been using it to diagnose compiler bugs and found it more
useful than the existing node printing code in some cases because
field filtering reduces the output to the interesting parts.
No impact on rest of compiler if functions are not called (which
they only should during a debugging session).
Change-Id: I79d7227f10dd78dbd4bbcdf204db236102fc97a7
Reviewed-on: https://go-review.googlesource.com/136397
Reviewed-by: Alan Donovan <adonovan@google.com>
Previously, some of output from gdb matched with literal string, while
gdb v8.2 print the address of variable (e.g. map key and value) in
output.
This commit fix the regex in testing the output.
Fixes#27608
Change-Id: Ic3fe8280b9f93fda2799116804822616caa66beb
Reviewed-on: https://go-review.googlesource.com/135055
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This reverts commit 067bb443af.
Reason for revert:
Failing Darwin-arm builds because that testing environment does not access testdata
from sibling directories. A future change will likely be made to move this testdata
out of src/testdata to create a solution that doesn't require the single-file directory.
Updates #27151
Change-Id: I8dbf5dd9512c94a605ee749ff4655cb00b0de686
Reviewed-on: https://go-review.googlesource.com/138737
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
R0 isn't the zero register any more. Oops.
Update #27695.
Change-Id: I46a975ed37d5e570afe2e228d3edf74949e08ad7
Reviewed-on: https://go-review.googlesource.com/138580
Reviewed-by: Michael Munday <mike.munday@ibm.com>
During a call to a reflect-generated function or method (via
makeFuncStub or methodValueCall), when should we scan the return
values?
When we're starting a reflect call, the space on the stack for the
return values is not initialized yet, as it contains whatever junk was
on the stack of the caller at the time. The return space must not be
scanned during a GC.
When we're finishing a reflect call, the return values are
initialized, and must be scanned during a GC to make sure that any
pointers in the return values are found and their referents retained.
When the GC stack walk comes across a reflect call in progress on the
stack, it needs to know whether to scan the results or not. It doesn't
know the progress of the reflect call, so it can't decide by
itself. The reflect package needs to tell it.
This CL adds another slot in the frame of makeFuncStub and
methodValueCall so we can put a boolean in there which tells the
runtime whether to scan the results or not.
This CL also adds the args length to reflectMethodValue so the
runtime can restrict its scanning to only the args section (not the
results) if the reflect package says the results aren't ready yet.
Do a delicate dance in the reflect package to set the "results are
valid" bit. We need to make sure we set the bit only after we've
copied the results back to the stack. But we must set the bit before
we drop reflect's copy of the results. Otherwise, we might have a
state where (temporarily) no one has a live copy of the results.
That's the state we were observing in issue #27695 before this CL.
The bitmap used by the runtime currently contains only the args.
(Actually, it contains all the bits, but the size is set so we use
only the args portion.) This is safe for early in a reflect call, but
unsafe late in a reflect call. The test issue27695.go demonstrates
this unsafety. We change the bitmap to always include both args
and results, and decide at runtime which portion to use.
issue27695.go only has a test for method calls. Function calls were ok
because there wasn't a safepoint between when reflect dropped its copy
of the return values and when the caller is resumed. This may change
when we introduce safepoints everywhere.
This truncate-to-only-the-args was part of CL 9888 (in 2015). That
part of the CL fixed the problem demonstrated in issue27695b.go but
introduced the problem demonstrated in issue27695.go.
TODO, in another CL: simplify FuncLayout and its test. stack return
value is now identical to frametype.ptrdata + frametype.gcdata.
Fixes#27695
Change-Id: I2d49b34e34a82c6328b34f02610587a291b25c5f
Reviewed-on: https://go-review.googlesource.com/137440
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Edge supports WASM but not TextEncoder or TextDecoder.
This PR adds a polyfill to `misc/wasm/wasm_exec.js` to fix this.
Fixes#27295
Change-Id: Ie35ee5604529b170a5dc380eb286f71bdd691d3e
GitHub-Last-Rev: a587edae28
GitHub-Pull-Request: golang/go#27296
Reviewed-on: https://go-review.googlesource.com/131718
Reviewed-by: Agniva De Sarker <agniva.quicksilver@gmail.com>
Reviewed-by: Richard Musiol <neelance@gmail.com>
SameFile opens file to discover identifier and volume serial
number that uniquely identify the file. SameFile uses Windows
CreateFile API to open the file, and that works well for files
and directories. But CreateFile always follows symlinks, so
SameFile always opens symlink target instead of symlink itself.
This CL uses FILE_FLAG_OPEN_REPARSE_POINT flag to adjust
CreateFile behavior when handling symlinks.
As per https://docs.microsoft.com/en-us/windows/desktop/FileIO/symbolic-link-effects-on-file-systems-functions#createfile-and-createfiletransacted
"... If FILE_FLAG_OPEN_REPARSE_POINT is specified and:
If an existing file is opened and it is a symbolic link, the handle
returned is a handle to the symbolic link. ...".
I also added new tests for both issue #21854 and #27225.
Issue #27225 is still to be fixed, so skipping the test on
windows for the moment.
Fixes#21854
Updates #27225
Change-Id: I8aaa13ad66ce3b4074991bb50994d2aeeeaa7c95
Reviewed-on: https://go-review.googlesource.com/134195
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This text is used mainly for benchmark compression testing, and in one
net test. The text was prevoiusly in a src/testdata directory, but since
that directory would only include one file, the text is moved to the
existing src/compression/testdata directory.
This does not cause any change to the benchmark results.
Updates #27151
Change-Id: I38ab5089dfe744189a970947d15be50ef1d48517
Reviewed-on: https://go-review.googlesource.com/138495
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
mcache.refill doesn't need to run on the system stack; it just needs
to be non-preemptible. Its only caller, mcache.nextFree, also needs to
be non-preemptible, so we can remove the unnecessary systemstack
switch.
Change-Id: Iba5b3f4444855f1dc134485ba588efff3b54c426
Reviewed-on: https://go-review.googlesource.com/138196
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Rick Hudson <rlh@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
mcache.refill acquires g.m.locks, which is pointless because the
caller itself absolutely must have done so already to prevent
ownership of mcache from shifting.
Also, mcache.refill's documentation is generally a bit out-of-date, so
this cleans this up.
Change-Id: Idc8de666fcaf3c3d96006bd23a8f307539587d6c
Reviewed-on: https://go-review.googlesource.com/138195
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>
This hasn't been true at least since 1.4. Until golang.org/cl/137235
they were lumped together into a random compile unit, now they are
assigned to the correct one.
Change-Id: Ib66539bd67af3e9daeecac8bf5f32c10e62e11b1
Reviewed-on: https://go-review.googlesource.com/138415
Reviewed-by: Than McIntosh <thanm@google.com>
Reviewed-by: David Chase <drchase@google.com>
This is the first commit of a series that will add AIX as an
operating system target for ppc64 architecture.
Updates #25893
Change-Id: I865b67a9c98277c11c1a56107be404ac5253277d
Reviewed-on: https://go-review.googlesource.com/138115
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
A simple grep over the codebase for "the the" which is often
missed by humans.
Change-Id: Ie4b4f07abfc24c73dcd51c8ef1edf4f73514a21c
Reviewed-on: https://go-review.googlesource.com/138335
Reviewed-by: Dave Cheney <dave@cheney.net>
This benchmark is odd currently because it uses inconsistent cases
between benchmark iterations, and each iteration actually does a bit of
testing.
This separates the two benchmark cases into two separate benchmarks and
removes the testing done on each iteration. The unit tests above
suffice.
The benchmark being more succinct will make it easier to gauge the
benefits of any future MIME header reading changes.
Change-Id: I2399fab28067f1aeec3d9b16951d39d787f8b39c
Reviewed-on: https://go-review.googlesource.com/134225
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Ending a loop with a break is confusing. Rewrite the loop so the
default behavior is to loop and then do the "post-loop" work outside
of the loop.
Change-Id: Ie49b4132541dfb5124c31a8163f2c883aa4abc75
Reviewed-on: https://go-review.googlesource.com/138155
Run-TryBot: Austin Clements <austin@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>
When go resolver was changed to use dnsmessage.Parser, LookupTXT
returned two strings in one record as two different records. This change
reverts back to concatenating multiple strings in a single
TXT record.
Fixes#27763
Change-Id: Ice226fcb2be4be58853de34ed35b4627acb429ea
Reviewed-on: https://go-review.googlesource.com/136955
Reviewed-by: Ian Gudger <igudger@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Ian Gudger <igudger@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Also includes a small tweak to test/run.go to allow package names
with Unicode letters (as opposed to just ASCII chars).
Updates #27836
Change-Id: Idbf0bdea24174808cddcb69974dab820eb13e521
Reviewed-on: https://go-review.googlesource.com/138075
Reviewed-by: Cherry Zhang <cherryyz@google.com>
The DIEs for global variables were all assigned to the first emitted
compile unit in debug_info, regardless of what it was. Move them
instead to their respective compile units.
Change-Id: If794fa0ba4702f5b959c6e8c16119b16e7ecf6d8
Reviewed-on: https://go-review.googlesource.com/137235
Reviewed-by: Than McIntosh <thanm@google.com>
Follow-up on https://go-review.googlesource.com/c/go/+/137857/4
which didn't remove this test file after it was removed from the
list of importer tests in importer_test.go.
Change-Id: Ib89cb3a6d976115da42c33443529ea27bd1ce838
Reviewed-on: https://go-review.googlesource.com/137975
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
ggcgo's export format numbers types consecutively, starting at 1.
This makes it trivially possible to use a slice (list) instead of
map for the internal types map.
Change-Id: Ib7814d7fabffac0ad2b56f04a5dad7d6d4c4dd0e
Reviewed-on: https://go-review.googlesource.com/137935
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The existing code uses a type map which associates a type number
with a type; references to existing types are expressed via the
type number in the export data.
Before this CL, type map entries were set when a type was read
in completely, which meant that recursive references to types
(i.e., type map entries) that were in the middle of construction
(i.e., where the type map was not yet updated) would lead to nil
types. Such cycles are usually created via defined types which
introduce a types.Named entry into the type map before the underlying
type is parsed; in this case the code worked. In case of type aliases,
no such "forwarder" exists and type cycles lead to nil types.
This CL fixes the problem by a) updating the type map as soon as
a type becomes available but before the type's components are parsed;
b) keeping track of a list of type map entries that may need to be
updated together (because of aliases that may all refer to the same
type); and c) adding (redundant) markers to the type map to detect
algorithmic errors.
Also:
- distinguish between parseInt and parseInt64
- added more test cases
Fixes#27856.
Change-Id: Iba701439ea3231aa435b7b80ea2d419db2af3be1
Reviewed-on: https://go-review.googlesource.com/137857
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Show a more specifc error message in the form of "%d variables but %v
returns %d values" if an assignment mismatch occurs with a function
or method call on the right.
Fixes#27595
Change-Id: Ibc97d070662b08f150ac22d686059cf224e012ab
Reviewed-on: https://go-review.googlesource.com/135575
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
DNS responses which do not contain answers of the requested type return
errNoSuchHost, the same error as rcode name error. Prior to
golang.org/cl/37879, both cases resulted in no additional name servers
being consulted for the question. That CL changed the behavior for both
cases. Issue #25336 was filed about the rcode name error case and
golang.org/cl/113815 fixed it. This CL fixes the no answers of requested
type case as well.
Fixes#27525
Change-Id: I52fadedcd195f16adf62646b76bea2ab3b15d117
Reviewed-on: https://go-review.googlesource.com/133675
Run-TryBot: Ian Gudger <igudger@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
I omitted vendor directories and anything necessary for bootstrapping.
(Tested by bootstrapping with Go 1.4)
Updates #27864
Change-Id: I7d9b68d0372d3a34dee22966cca323513ece7e8a
Reviewed-on: https://go-review.googlesource.com/137856
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Fix the code to use write barriers on heap memory, and no
write barriers on stack memory.
These errors were discoverd as part of fixing #27695. They may
have something to do with that issue, but hard to be sure.
The core cause is different, so this fix is a separate CL.
Update #27695
Change-Id: Ib005f6b3308de340be83c3d07d049d5e316b1e3c
Reviewed-on: https://go-review.googlesource.com/137438
Reviewed-by: Austin Clements <austin@google.com>
We already aliased mSpanInUse to _MSpanInUse. The dual constants are
getting annoying, so fix all of these to use the mSpan* naming
convention.
This was done automatically with:
sed -i -re 's/_?MSpan(Dead|InUse|Manual|Free)/mSpan\1/g' *.go
plus deleting the existing definition of mSpanInUse.
Change-Id: I09979d9d491d06c10689cea625dc57faa9cc6767
Reviewed-on: https://go-review.googlesource.com/137875
Run-TryBot: Austin Clements <austin@google.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This change updates the expected output of the gdb debugging session
in the TestNexting internal/ssa test, aligning it with the changes
introduced in CL 134555.
Fixes#27863
Change-Id: I29e747930c7668b429e8936ad230c4d6aa24fdac
Reviewed-on: https://go-review.googlesource.com/137455
Reviewed-by: Than McIntosh <thanm@google.com>
it looks like we should abort trying to configure the http2 transport
again, once it has been configured already.
Otherwise there will be no effect of these checks and changes, as they
will be overridden later again and the disable logic below will have no
effect, too.
So it really looks like we just forgot a return statement here.
Change-Id: Ic99b3bbc662a4e1e1bdbde77681bd1ae597255ad
Reviewed-on: https://go-review.googlesource.com/134795
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
It's possible for a local import path to refer to a standard library
package. This was not being correctly handled for gccgo. When using
gccgo, change the code to permit the existing lexical test, and to
accept a missing directory for a standard package found via a local
impor path.
Change-Id: Ia9829e55c0ff62e7d1f01a1d6dc9fcff521501ca
Reviewed-on: https://go-review.googlesource.com/137439
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
The module code in cmd/go sometimes needs to know whether it is
looking at a standard package, and currently uses gc-specific code for
that. This CL moves the existing isStandardPackage code in the
go/build package, which works for both gc and gccgo, into a new
internal/goroot package so that cmd/go can call it. The changes to
cmd/go will be in a subsequent CL.
Change-Id: Ic1ce4c022a932c6b3e99fa062631577085cc6ecb
Reviewed-on: https://go-review.googlesource.com/137435
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
