This:
1) Defines the ABI hash of a package (as the SHA1 of the __.PKGDEF)
2) Defines the ABI hash of a shared library (sort the packages by import
path, concatenate the hashes of the packages and SHA1 that)
3) When building a shared library, compute the above value and define a
global symbol that points to a go string that has the hash as its value.
4) When linking against a shared library, read the abi hash from the
library and put both the value seen at link time and a reference
to the global symbol into the moduledata.
5) During runtime initialization, check that the hash seen at link time
still matches the hash the global symbol points to.
Change-Id: Iaa54c783790e6dde3057a2feadc35473d49614a5
Reviewed-on: https://go-review.googlesource.com/8773
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Michael Hudson-Doyle <michael.hudson@canonical.com>
addmoduledata is called from a .init_array function and need to follow the
platform ABI. It contains accesses to global data which are rewritten to use
R15 by the assembler, and as R15 is callee-save we need to save it.
Change-Id: I03893efb1576aed4f102f2465421f256f3bb0f30
Reviewed-on: https://go-review.googlesource.com/9941
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The trace-viewer doesn't use the Go license, so it makes sense
to include the license text into the README.md file.
While we're at here, reformat existing text using real Markdown
syntax.
Change-Id: I13e42d3cc6a0ca7e64e3d46ad460dc0460f7ed09
Reviewed-on: https://go-review.googlesource.com/9882
Reviewed-by: Rob Pike <r@golang.org>
When
using -buildmode=c-archive or c-shared, and
when installing packages that use cgo, and
when those packages export some functions via //export comments,
then
for each such package, install a pkg.h header file that declares the
functions.
This permits C code to #include the header when calling the Go
functions.
This is a little awkward to use when there are multiple packages that
export functions, as you have to "go install" your c-archive/c-shared
object and then pull it out of the package directory. When compiling
your C code you have to -I pkg/$GOOS_$GOARCH. I haven't thought of
any more convenient approach. It's simpler when only the main package
has exported functions.
When using c-shared you currently have to use a _shared suffix in the
-I option; it would be nice to fix that somehow.
Change-Id: I5d8cf08914b7d3c2b194120c77791d2732ffd26e
Reviewed-on: https://go-review.googlesource.com/9798
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This changes the action graph when shared libraries are involved to always have
an action for the shared library (which does nothing when the shared library
is up to date).
Change-Id: Ibbc70fd01cbb3f4e8c0ef96e62a151002d446144
Reviewed-on: https://go-review.googlesource.com/8934
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Fix several warnings generated on the linux-amd64-clang builder
and make it clear to clang that -znow is a linker only flag.
Tested with
env CC=clang-3.5 ./all.bash
env CC=gcc-4.8 ./all.bash
Change-Id: I5ca7366ba8bf6221a36d25a2157dda4b4f3e16fa
Reviewed-on: https://go-review.googlesource.com/9523
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Just a first basic test, I'll extend this to test more but want to get an
opinion on basic approach first.
Change-Id: Idab9ebd7d9960b000b81a01a1e53258bf4bce755
Reviewed-on: https://go-review.googlesource.com/9386
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
This doesn't test much with gccgo, but at least it builds now, and the
test does, unsurprisingly, pass. A proper test would require adding
assembly files in GCC syntax for all platforms that gccgo supports,
which would be infeasible.
Also added copyright headers to the asm files.
Change-Id: Icea5af29d7d521a0681506ddb617a79705b76d33
Reviewed-on: https://go-review.googlesource.com/9417
Reviewed-by: Minux Ma <minux@golang.org>
Instead of comparing against the entire output that may include
verbose warning messages, use the last line of the output and check
it includes the expected success message (PASS).
Change-Id: Iafd583ee5529a8aef5439b9f1f6ce0185e4b1331
Reviewed-on: https://go-review.googlesource.com/9304
Reviewed-by: David Crawshaw <crawshaw@golang.org>
- main3.c tests main.main is exported when compiled for GOOS=android.
- wait longer for main2.c (it's slow on android/arm)
- rearranged test.bash
Fixes#10070.
Change-Id: I6e5a98d1c5fae776afa54ecb5da633b59b269316
Reviewed-on: https://go-review.googlesource.com/9296
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
Forward signals to signal handlers installed before Go installs its own,
under certain circumstances. In particular, as iant@ suggests, signals are
forwarded iff:
(1) a non-SIG_DFL signal handler existed before Go, and
(2) signal is synchronous (i.e., one of SIGSEGV, SIGBUS, SIGFPE), and
(3a) signal occured on a non-Go thread, or
(3b) signal occurred on a Go thread but in CGo code.
Supported only on Linux, for now.
Change-Id: I403219ee47b26cf65da819fb86cf1ec04d3e25f5
Reviewed-on: https://go-review.googlesource.com/8712
Reviewed-by: Ian Lance Taylor <iant@golang.org>
The purpose of this test is to make sure that -buildmode=c-shared
works even when the shared library can be built without invoking cgo.
Change-Id: Id6f95af755992b209aff770440ca9819b74113ab
Reviewed-on: https://go-review.googlesource.com/9166
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Change-Id: I0d3f9841500e0a41f1c427244869bf3736a31e18
Reviewed-on: https://go-review.googlesource.com/9075
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Followed the same test pattern in misc/cgo/testcarchive.
Change-Id: I2f863b5c24a28f0b38b0128ed3e8a92c17fb5b9f
Reviewed-on: https://go-review.googlesource.com/8985
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This memory is untyped and can't be used anymore.
The next version of SWIG won't need it.
Change-Id: I592b287c5f5186975ee09a9b28d8efe3b57134e7
Reviewed-on: https://go-review.googlesource.com/8956
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This is a follow-up to CL 8910.
This is the version that I have tested and which works
when appID and teamID are not the same (which they appear
to be for the builder).
I am unsure how I submitted it with the wrong code.
Change-Id: I186e34e91953d082b507390c1cd2042e5419c4c9
Reviewed-on: https://go-review.googlesource.com/8943
Reviewed-by: David Crawshaw <crawshaw@golang.org>
Because there is no libgcc.
Change-Id: I3b3f80791a1db4c2b7318f81a115972cd2237f07
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/8786
Reviewed-by: David Crawshaw <crawshaw@golang.org>
We no longer need the EXC_BAD_ACCESS watcher as runtime/cgo contains
a mach exception handler that catches it. And now lldb only
intermittently reports process connection and exiting, so instead
just look for the PASS from Go.
Change-Id: I403266558f5a900e0b87ec1019d9baec88148d23
Reviewed-on: https://go-review.googlesource.com/8957
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Use environment variables to allow set-and-forget.
Add a script to attempt to autodetect codesign info.
Change-Id: Ic56b9c5f097b1a4117ebb89c408bc333d91f581d
Reviewed-on: https://go-review.googlesource.com/8910
Reviewed-by: David Crawshaw <crawshaw@golang.org>
With the new buildmodes c-archive and c-shared, it is possible for a
cgo call to come in early in the lifecycle of a Go program. Calls
before the runtime has been initialized are caught by
_cgo_wait_runtime_init_done. However a call can come in after the
runtime has initialized, but before the program's package init
functions have finished running.
To avoid this cgocallback checks m.ncgo to see if we are on a thread
running Go. If not, we may be a foreign thread and it blocks until
main_init is complete.
Change-Id: I7a9f137fa2a40c322a0b93764261f9aa17fcf5b8
Reviewed-on: https://go-review.googlesource.com/8897
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
The -lldb flag makes it easy to use go run and end up in a debugging
session on darwin/arm.
Change-Id: I556f93e950086a7dff4839f301b9c55f7579f87b
Reviewed-on: https://go-review.googlesource.com/8024
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
This reverts commit 9fa9f966e9.
The change has broken darwin and netbsd builders. It needs to be tested properly.
Change-Id: Id9e2d30caa8764c362c9f33890015dfc1aae0dab
Reviewed-on: https://go-review.googlesource.com/8527
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
After moving the darwin/arm builder to new hardware several new flaky
error messages appeared. This provided enough information to Google
to make it clear that iOS build systems have been flaky for many
years, and that is unlikely to change any time soon.
However, all of the pain of lldb and using a breakpoint early in
program initialization gives us an advantage: all install and
initialization flakiness appears to happen before the Go program ever
gets going. So if we see an error or we timeout before we reach our
breakpoint (before any test code has executed), we can assume it is
the fault of the builder and restart without risking hiding a flaky
Go test.
This code has successfully processed the last 8 builds. I am hopeful.
Change-Id: Ide24aaae4fa7bdab9d8f4432bb85d8f2256c7606
Reviewed-on: https://go-review.googlesource.com/8241
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
The clever partial timer I added interacts badly with iOS app launch
timeout termination. A fixed timeout will be easier to debug.
Change-Id: I6eb4ee5f1431539f00fa707e8cde6f3cf86983fc
Reviewed-on: https://go-review.googlesource.com/8083
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Split out from cl/8024 for clarity and improved approach.
Rarely, "stop reason = breakpoint" does not appear in the lldb stop
text. However the program is ready to proceed. To be a little more
robust about those cases, we wait for two seconds, and if that text
doesn't appear but a prompt does we continue and hope for the best.
Worst case, this results in a harder to read failure message.
Change-Id: Ib20aa92564cdccefd2b7260417c647cd44122b66
Reviewed-on: https://go-review.googlesource.com/8080
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
The SecureRandom named service was removed in
https://codereview.chromium.org/550523002. And the new syscall
was introduced in https://codereview.chromium.org/537543003.
Accepting this will remove the support for older version of
sel_ldr. I've confirmed that both pepper_40 and current
pepper_canary have this syscall.
After this change, we need sel_ldr from pepper_39 or above to
work.
Fixes#9261
Change-Id: I096973593aa302ade61f259a3a71ebc7c1a57913
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/1755
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
The test used to import ../callback. I forget why that ever worked,
but it probably had something to do with the shared libraries we used
to use with SWIG. It doesn't work today.
Change-Id: Ib83d6c398aa46bf2fc66320b47b6e6d9897ee0b7
Reviewed-on: https://go-review.googlesource.com/7004
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This will enable test sharding over multiple VMs, to speed trybot answers.
Update #10029
Change-Id: Ie277c6459bc38005e4d6af14d22effeaa0a4667e
Reviewed-on: https://go-review.googlesource.com/6531
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
We now wait until we see the completed prompt from a command before
proceeding. This seems to cut down on a spurious error I have seen
this afternoon.
Change-Id: Ic0a3481d8c265c3c3b4449ec7ac1c2752b85b0b6
Reviewed-on: https://go-review.googlesource.com/6691
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
See golang.org/cl/6511.
Change-Id: I2145a42877ed6b78400f29c2ef18969870dab5c3
Reviewed-on: https://go-review.googlesource.com/6512
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
This script is getting very close to complete, and is complex enough
that I'd like to get what's there so far reviewed. With it the builder
is left failing on eight packages. Two of those involve correcting
GOROOT which may need modifications to this script, the others are
either a unix sockets bug I have to hunt down or are caused by lldb
getting stuck on SIGSEGV, a TODO.
Change-Id: I5ff933800167b6764b51ad195da7dcda61d59ff8
Reviewed-on: https://go-review.googlesource.com/6404
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>
Trace command allows to visualize and analyze traces.
Run as:
$ go tool trace binary trace.file
The commands opens web browser with the main page,
which contains links for trace visualization,
blocking profiler, network IO profiler and per-goroutine
traces.
Also move trace parser from runtime/pprof/trace_parser_test.go
to internal/trace/parser.go, so that it can be shared between
tests and the command.
Change-Id: Ic97ed59ad6e4c7e1dc9eca5e979701a2b4aed7cf
Reviewed-on: https://go-review.googlesource.com/3601
Reviewed-by: Andrew Gerrand <adg@golang.org>
Only documentation / comment changes. Update references to
point to golang.org permalinks or go.googlesource.com/go.
References in historical release notes under doc are left as is.
Change-Id: Icfc14e4998723e2c2d48f9877a91c5abef6794ea
Reviewed-on: https://go-review.googlesource.com/4060
Reviewed-by: Ian Lance Taylor <iant@golang.org>
On Darwin/ARM, because libSystem doesn't provide functions for
__sync_fetch_and_add, and only clang can inline that function,
skip the test when building with GCC.
Change-Id: Id5e9d8f9bbe1e6bcb2f381f0f66cf68aa95277c7
Reviewed-on: https://go-review.googlesource.com/2125
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This dashboard is no longer in use, and doesn't work with Gerrit.
Change-Id: Ib7c367dcad97322566610157b15e23db5bec58ff
Reviewed-on: https://go-review.googlesource.com/3028
Reviewed-by: David Symonds <dsymonds@golang.org>
This change includes the cleanup of temporary files created during
the binary execution as well.
Change-Id: Ic01a0a537d1daafcaa3acda1ec344aff5dcddfc2
Reviewed-on: https://go-review.googlesource.com/2903
Reviewed-by: David Crawshaw <crawshaw@golang.org>
This test requires external linking, but we don't yet implement
external linking on ppc64 (tracked in issue #8912). Disable the test
on ppc64 until external linking is implemented.
This makes all.bash pass on ppc64le.
Change-Id: I741498d4d9321607e7a65792a33faf8187bd18e4
Reviewed-on: https://go-review.googlesource.com/2908
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Git marks some of its files read only, so os.RemoveAll isn't sufficient
to remove them from the ".git" directory.
Change-Id: I3150596931d1c77e7cf9fb8da1a999d2c6730121
Reviewed-on: https://go-review.googlesource.com/2930
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
While we're here, rename TestIssue7234 to Test7234 for consistency
with other tests.
Fixes#9557.
Change-Id: I22b0a212b31e7b4f199f6a70deb73374beb80f84
Reviewed-on: https://go-review.googlesource.com/2654
Reviewed-by: Ian Lance Taylor <iant@golang.org>
SWIG has always returned a typed interface value for a C++ class,
so the interface value will never be nil even if the pointer itself
is NULL. ptr == NULL in C/C++ should be ptr.Swigcptr() == 0 in Go.
Fixes#9514.
Change-Id: I3778b91acf54d2ff22d7427fbf2b6ec9b9ce3b43
Reviewed-on: https://go-review.googlesource.com/2440
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Now that there's no 6c compiler anymore, there's no need for cgo to
generate C headers that are compatible with it.
Fixes#9528
Change-Id: I43f53869719eb9a6065f1b39f66f060e604cbee0
Reviewed-on: https://go-review.googlesource.com/2482
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This test is doing pointer graph manipulation from C, and we
cannot support that with concurrent GC. The wbshadow mode
correctly diagnoses missing write barriers.
Disable the test in that mode for now. There is a bigger issue
behind it, namely SWIG, but for now we are focused on making
all.bash pass with wbshadow enabled.
Change-Id: I55891596d4c763e39b74082191d4a5fac7161642
Reviewed-on: https://go-review.googlesource.com/2346
Reviewed-by: Minux Ma <minux@golang.org>
Reviewed-by: Rick Hudson <rlh@golang.org>
Use typedmemmove, typedslicecopy, and adjust reflect.call
to execute the necessary write barriers.
Found with GODEBUG=wbshadow=2 mode.
Eventually that will run automatically, but right now
it still detects other missing write barriers.
Change-Id: Iec5b5b0c1be5589295e28e5228e37f1a92e07742
Reviewed-on: https://go-review.googlesource.com/2312
Reviewed-by: Keith Randall <khr@golang.org>
For Go 1.5, we can use go:linkname rather than assembly thunk for gc.
Gccgo already has support for //extern.
Change-Id: I5505aa247dd5b555112f7261ed2f192c81cf0bdf
Signed-off-by: Shenghou Ma <minux@golang.org>
Reviewed-on: https://go-review.googlesource.com/1888
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
issue9400_linux.go did not build on 386 because it used a constant
that was larger than a 32-bit int in a ... argument. Fix this by
casting the constant to uint64 (to match how the constant is being
used).
Change-Id: Ie8cb64c3910382a41c7852be7734a62f0b2d5a21
Reviewed-on: https://go-review.googlesource.com/2060
Reviewed-by: Ian Lance Taylor <iant@golang.org>
These signals are used by glibc to broadcast setuid/setgid to all
threads and to send pthread cancellations. Unlike other signals, the
Go runtime does not intercept these because they must invoke the libc
handlers (see issues #3871 and #6997). However, because 1) these
signals may be issued asynchronously by a thread running C code to
another thread running Go code and 2) glibc does not set SA_ONSTACK
for its handlers, glibc's signal handler may be run on a Go stack.
Signal frames range from 1.5K on amd64 to many kilobytes on ppc64, so
this may overflow the Go stack and corrupt heap (or other stack) data.
Fix this by ensuring that these signal handlers have the SA_ONSTACK
flag (but not otherwise taking over the handler).
This has been a problem since Go 1.1, but it's likely that people
haven't encountered it because it only affects setuid/setgid and
pthread_cancel.
Fixes#9600.
Change-Id: I6cf5f5c2d3aa48998d632f61f1ddc2778dcfd300
Reviewed-on: https://go-review.googlesource.com/1887
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Gccgo can only get a backtrace for the currently running thread, which
means that it can only get a backtrace for goroutines currently running
Go code. When a goroutine is running C code, gccgo has no way to stop
it and get the backtrace. This test is all about getting a backtrace
of goroutines running C code, so it can't work for gccgo.
Change-Id: I2dff4403841fb544da7396562ab1193875fc14c3
Reviewed-on: https://go-review.googlesource.com/1904
Reviewed-by: Minux Ma <minux@golang.org>
Also: checkout sub-repos from Mercurial manually
instead of using "go get". (for the 1.4 release)
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/190720043
Turns out it *is* needed because the cmd/link tests expect to find their own files.
««« original CL description
misc/nacl: exclude cmd/link from the test zip.
It does not appear to be necessary, and cmd/link does not appear in release branches.
LGTM=rsc
R=adg, rsc
CC=golang-codereviews
https://golang.org/cl/176900044
»»»
TBR=rsc
R=adg, rsc
CC=golang-codereviews
https://golang.org/cl/175870045
It does not appear to be necessary, and cmd/link does not appear in release branches.
LGTM=rsc
R=adg, rsc
CC=golang-codereviews
https://golang.org/cl/176900044
(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
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
ARPHELPLINK yields 404; update the URL.
While here, also prefix the ARPREADME and ARPURLINFOABOUT URL's with the HTTP scheme to make 'em clickable links in the Add or Remove Programs listing.
LGTM=adg
R=golang-codereviews
CC=adg, golang-codereviews
https://golang.org/cl/154580045
Set correct version number at Windows installer based on
Go's Mercurial tag.
Name | Version
------------------------------------------------
Go Programming Language amd64 go1.3.3 | 1.3.3
Go Programming Language amd64 go1.2rc3 | 1.2
Go Programming Language amd64 go1.2beta1 | 1.2
Fixes#8239.
LGTM=adg
R=adg, c.emil.hessman, alex.brainman
CC=golang-codereviews
https://golang.org/cl/160950044
Our current pe object reader assumes that every symbol starting with
'.' is section. It appeared to be true, until now gcc 4.9.1 generates
some symbols with '.' at the front. Change that logic to check other
symbol fields in addition to checking for '.'. I am not an expert
here, but it seems reasonable to me.
Added test, but it is only good, if tested with gcc 4.9.1. Otherwise
the test PASSes regardless.
Fixes#8811.
Fixes#8856.
LGTM=jfrederich, iant, stephen.gutekanst
R=golang-codereviews, jfrederich, stephen.gutekanst, iant
CC=alex.brainman, golang-codereviews
https://golang.org/cl/152410043
The test doesn't work with GOTRACEBACK != 2.
Diagnose that failure mode.
LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews, r
https://golang.org/cl/152970043
+ static test
NB: there's a preexisting (dynamic) failure of test issue7978.go.
LGTM=iant
R=rsc, iant
CC=golang-codereviews
https://golang.org/cl/144650045
During a cgo call, the stack can be copied. This copy invalidates
the pointer that cgo has into the return value area. To fix this
problem, pass the address of the location containing the stack
top value (which is in the G struct). For cgo functions which
return values, read the stktop before and after the cgo call to
compute the adjustment necessary to write the return value.
Fixes#8771
LGTM=iant, rsc
R=iant, rsc, khr
CC=golang-codereviews
https://golang.org/cl/144130043
Those C files would have been compiled with 6c.
It's close to impossible to use C correctly anymore,
and the C compilers are going away eventually.
Make them unavailable now.
go1.4.txt change in CL 145890046
LGTM=iant
R=iant
CC=golang-codereviews, r
https://golang.org/cl/149720043
Normally, the caller to runtime.entersyscall() must not return before
calling runtime.exitsyscall(), lest g->syscallsp become a dangling
pointer. runtime.cgocallbackg() violates this constraint. To work around
this, save g->syscallsp and g->syscallpc around cgo->Go callbacks, then
restore them after calling runtime.entersyscall(), which restores the
syscall stack frame pointer saved by cgocall. This allows the GC to
correctly trace a goroutine that is currently returning from a
Go->cgo->Go chain.
This also adds a check to proc.c that panics if g->syscallsp is clearly
invalid. It is not 100% foolproof, as it will not catch a case where the
stack was popped then pushed back beyond g->syscallsp, but it does catch
the present cgo issue and makes existing tests fail without the bugfix.
Fixes#7978.
LGTM=dvyukov, rsc
R=golang-codereviews, dvyukov, minux, bradfitz, iant, gobot, rsc
CC=golang-codereviews, rsc
https://golang.org/cl/131910043
Now it's two allocations. I don't see much downside to that,
since the two pieces were in different cache lines anyway.
Rename 'conservative' to 'cgo_conservative_type' and make
clear that _cgo_allocate is the only allowed user.
This depends on CL 141490043, which removes the other
use of conservative (in defer).
LGTM=dvyukov, iant
R=khr, dvyukov, iant
CC=golang-codereviews, rlh
https://golang.org/cl/139610043
This CL adjusts code referring to src/pkg to refer to src.
Immediately after submitting this CL, I will submit
a change doing 'hg mv src/pkg/* src'.
That change will be too large to review with Rietveld
but will contain only the 'hg mv'.
This CL will break the build.
The followup 'hg mv' will fix it.
For more about the move, see golang.org/s/go14nopkg.
LGTM=r
R=r
CC=golang-codereviews
https://golang.org/cl/134570043
testSchedLocal* tests need to malloc now because their
stack frames are too big to fit on the G0 stack.
LGTM=iant
R=golang-codereviews, iant, khr
CC=golang-codereviews
https://golang.org/cl/133660043
newstackcall creates a new stack segment, and we want to
be able to throw away all that code.
LGTM=khr
R=khr, iant
CC=dvyukov, golang-codereviews, r
https://golang.org/cl/139270043
If there is doubt about passing arguments correctly
(as there is in this test), there should be doubt about
getting the results back intact too. Using 0 and 1
(especially 0 for success) makes it easy to get a PASS
accidentally when the return value is not actually
being propagated. Use less common values.
LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews, r
https://golang.org/cl/141110043
Instead of making asmcgocall call asmcgocall_errno,
make both load args into registers and call a shared
assembly function.
On amd64, this costs 1 word in the asmcgocall_errno path
but saves 3 words in the asmcgocall path, and the latter
is what happens on critical nosplit paths on Windows.
On arm, this fixes build failures: asmcgocall was writing
the arguments for asmcgocall_errno into the wrong
place on the stack. Passing them in registers avoids the
decision entirely.
On 386, this isn't really needed, since the nosplit paths
have twice as many words to work with, but do it for consistency.
Update #8635
Fixes arm build (except GOARM=5).
TBR=iant
CC=golang-codereviews
https://golang.org/cl/134390043
The [568]c compilers no longer support packed structs, so
using them with -cdefs no longer works. Just commenting out
the test, rather than removing it, in case this needs to be
handled. It may be that -cdefs can go away entirely in the
future, in which case so can this directory.
LGTM=mdempsky
R=rsc, mdempsky
CC=golang-codereviews
https://golang.org/cl/136030043
Clang 3.2 and older (as shipped with OS X Mountain Lion and older)
outputs ambiguous DWARF debug info that makes it impossible for us to
reconstruct accurate type information as required for this test.
Fixes#8611.
LGTM=rsc
R=r, rsc, minux
CC=golang-codereviews
https://golang.org/cl/135990043
Add gofmt.go and gofmt_test.go as they are part of the test data set.
See CL 130440043.
LGTM=dvyukov
R=golang-codereviews, dvyukov
CC=golang-codereviews
https://golang.org/cl/132820044
E.g., here's the new "go build" output:
$ go build misc/cgo/errors/issue8442.go
# command-line-arguments
could not determine kind of name for C.issue8442foo
gcc errors for preamble:
misc/cgo/errors/issue8442.go:11:19: error: unknown type name 'UNDEF'
Fixes#8442.
LGTM=iant
R=iant, alex.brainman
CC=golang-codereviews
https://golang.org/cl/129160043
In cgo, now that recursive calls to typeConv.Type() always work,
we can more robustly calculate the array sizes based on the size
of our element type.
Also, in debug/dwarf, the decision to call zeroType is made
based on a type's usage within a particular struct, but dwarf.Type
values are cached in typeCache, so the modification might affect
uses of the type in other structs. Current compilers don't appear
to share DWARF type entries for "[]foo" and "[0]foo", but they also
don't consistently share type entries in other cases. Arguably
modifying the types is an improvement in some cases, but varying
translated types according to compiler whims seems like a bad idea.
Lastly, also in debug/dwarf, zeroType only needs to rewrite the
top-level dimension, and only if the rest of the array size is
non-zero.
Fixes#8428.
LGTM=iant
R=iant
CC=golang-codereviews
https://golang.org/cl/127980043
Some systems, like Ubuntu, pass --build-id when linking. The
effect is to put a note in the output file. This is not
useful when generating an object file with the -r option, as
it eventually causes multiple build ID notes in the final
executable, all but one of which are for tiny portions of the
file and are therefore useless.
Disable that by passing an explicit --build-id=none when
linking with -r on systems that might do this.
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/119460043
Instead of immediately completing pointer type mappings, add them to
a queue to allow them to be completed later. This fixes issues caused
by Type() returning arbitrary in-progress type mappings.
Fixes#8368.
Fixes#8441.
LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/122850043
Instead of including <sys/types.h> to get size_t, instead include
the ISO C standard <stddef.h> header, which defines fewer additional
types at risk of colliding with the user code. In particular, this
prevents collisions between <sys/types.h>'s userspace definitions with
the kernel definitions needed by defs_linux.go.
Also, -cdefs mode uses #pragma pack, so we can keep misaligned fields.
Fixes#8477.
LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/120610043
Update #6677
When a struct contains an anonymous union, use the type and
name of the first field in the union.
This should make the glibc <sys/resource.h> file work; in that
file struct rusage has fields like
__extension__ union
{
long int ru_maxrss;
__syscall_slong_t __ru_maxrss_word;
};
in which the field that matters is ru_maxrss and
__ru_maxrss_word just exists to advance to the next field on
systems where the kernel uses long long fields but userspace
expects long fields.
LGTM=mikioh.mikioh
R=golang-codereviews, mikioh.mikioh
CC=golang-codereviews
https://golang.org/cl/106260044
Breaks build for FreeBSD. Probably clang related?
««« original CL description
cmd/cgo: disable inappropriate warnings when the gcc struct is empty
package main
//#cgo CFLAGS: -Wall
//void test() {}
import "C"
func main() {
C.test()
}
This code will cause gcc issuing warnings about unused variable.
This commit use offset of the second return value of
Packages.structType to detect whether the gcc struct is empty,
and if it's directly invoke the C function instead of writing an
unused code.
LGTM=dave, minux
R=golang-codereviews, iant, minux, dave
CC=golang-codereviews
https://golang.org/cl/109640045
»»»
TBR=dfc
R=dave
CC=golang-codereviews
https://golang.org/cl/114990044
package main
//#cgo CFLAGS: -Wall
//void test() {}
import "C"
func main() {
C.test()
}
This code will cause gcc issuing warnings about unused variable.
This commit use offset of the second return value of
Packages.structType to detect whether the gcc struct is empty,
and if it's directly invoke the C function instead of writing an
unused code.
LGTM=dave, minux
R=golang-codereviews, iant, minux, dave
CC=golang-codereviews
https://golang.org/cl/109640045
On amd64, the real time is reduced from 176.76s to 140.26s.
On ARM, the real time is reduced from 921.61s to 726.30s.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/101580043
We are not the right people to support editor plugins, and the profusion
of editors in this CL demonstrates the unreality of pretending to do so.
People are free to create and advertise their own repos with support.
For discussion: https://groups.google.com/forum/#!topic/golang-dev/SA7fD470FxU
LGTM=rminnich, kamil.kisiel, gri, rsc, dave, josharian, ruiu
R=golang-codereviews, rminnich, kamil.kisiel, gri, rsc, dominik.honnef, dave, josharian, ruiu, ajstarks
CC=golang-codereviews
https://golang.org/cl/105470043
Using flet to replace kill-region with delete-region was a hack,
flet is now (GNU Emacs 24.3) deprecated and at least two people
have reported an issue where using go--delete-whole-line would
permanently break their kill ring. While that issue is probably
caused by faulty third party code (possibly prelude), it's easier
to write a clean implementation than to tweak the hack.
LGTM=ruiu, adonovan
R=adonovan, ruiu
CC=adg, golang-codereviews
https://golang.org/cl/106010043
If we see a typedef to an anonymous struct more than once,
presumably in two different Go files that import "C", use the
same Go type name.
Fixes#8133.
LGTM=rsc
R=rsc
CC=golang-codereviews
https://golang.org/cl/102080043
This program has barely been touched since it was first committed,
and in its current state it opens a code execution vector similar
to the one that was recently fixed in go.tools/playground/socket.
Rather than try to make it secure, remove it.
LGTM=minux, rsc
R=rsc, minux
CC=golang-codereviews
https://golang.org/cl/102030047
For incomplete struct S, C.T and C.struct_S were interchangeable in Go 1.2
and earlier, because all incomplete types were interchangeable
(even C.struct_S1 and C.struct_S2).
CL 76450043, which fixed issue 7409, made different incomplete types
different from Go's point of view, so that they were no longer completely
interchangeable.
However, imprecision about C.T and C.struct_S - really the same
underlying C type - is the one behavior enabled by the bug that
is most likely to be depended on by existing cgo code.
Explicitly allow it, to keep that code working.
Fixes#7786.
LGTM=iant, r
R=golang-codereviews, iant, r
CC=golang-codereviews
https://golang.org/cl/98580046
Add nacl.bash, the NaCl version of all.bash.
It's a separate script because it builds a variant of package syscall
with a large zip file embedded in it, containing all the input files
needed for tests.
Disable various tests new since the last round, mostly the ones using os/exec.
Fixes#7945.
LGTM=dave
R=golang-codereviews, remyoudompheng, dave, bradfitz
CC=golang-codereviews
https://golang.org/cl/100590044
If you write:
var x = 3
then the compiler arranges for x to be initialized in the linker
with an actual 3 from the data segment, rather than putting
x in the bss and emitting init-time "x = 3" assignment code.
If you write:
var y = x
var x = 3
then the compiler is clever and treats this the same as if
the code said 'y = 3': they both end up in the data segment
with no init-time assignments.
If you write
var y = x
var x int
then the compiler was treating this the same as if the
code said 'x = 0', making both x and y zero and avoiding
any init-time assignment.
This copying optimization to avoid init-time assignment of y
is incorrect if 'var x int' doesn't mean 'x = 0' but instead means
'x is initialized in C or assembly code'. The program ends up
with 'y = 0' instead of 'y = the value specified for x in that other code'.
Disable the propagation if there is no initializer for x.
This comes up in some uses of cgo, because cgo generates
Go globals that are initialized in accompanying C files.
Fixes#7665.
LGTM=iant
R=golang-codereviews, iant
CC=golang-codereviews
https://golang.org/cl/93200044
The vi bundled with OS X has a weird bug in that if you turn off
filetype in .vimrc when it's not turned on, even a clean exit of
vi will return 1 which breaks almost everything.
While we're at it, add hint to change $GOROOT to its actual value
in .vimrc.
Fixes#7865.
LGTM=robert.hencke, dsymonds
R=golang-codereviews, robert.hencke, gobot, dsymonds
CC=golang-codereviews
https://golang.org/cl/96800046
For the gc compiler the Go function Issue7695 is defined in
runtime.c, but there is no way to do that for gccgo, because
there is no way to get the correct pkgpath. The test is not
important for gccgo in any case.
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/93870044
Cgo writes C function declarations pretending every arg is a pointer.
If the C function is deferred, it does not inhibit stack copying on split.
The stack copying code believes the C declaration, possibly misinterpreting
integers as pointers.
Probably the right fix for Go 1.3 is to make deferred C functions inhibit
stack copying.
For Go 1.4 and beyond we probably need to make cgo generate Go code
for 6g here, not C code for 6c.
Update #7695
LGTM=khr
R=khr
CC=golang-codereviews
https://golang.org/cl/83820043
go-mode on Emacs 23 wrongly recognizes a backquote in a comment or
a string as a start of a raw string literal. Below is an example
that go-mode does not work well. This patch is to fix that issue.
// `
var x = 1
// `
LGTM=dominik.honnef
R=golang-codereviews, dominik.honnef, adonovan
CC=golang-codereviews
https://golang.org/cl/84900043
People (like me!) will still try to run misc/benchcmp
and wonder where it went. Tell them.
LGTM=bradfitz
R=golang-codereviews, bradfitz, dave
CC=adg, golang-codereviews, r
https://golang.org/cl/82710043
Name of built-in function is not reserved word in Go, and you can
use it as variable name. "new" is often used as local variable, for
instance.
This patch is to apply font-lock-builtin-face only when built-in
function name is followed by '(', so that it doesn't highlight
non-function variable that happen to have the same name as built-in
function.
LGTM=dominik.honnef
R=golang-codereviews, dominik.honnef, adonovan
CC=golang-codereviews
https://golang.org/cl/79260043
cgo represents all 0-sized and unsized types internally as [0]byte. This means that pointers to incomplete types would be interchangable, even if given a name by typedef.
Fixes#7409.
LGTM=iant
R=golang-codereviews, bradfitz, iant
CC=golang-codereviews
https://golang.org/cl/76450043
Go-mode in Emacs 23 does not recognize a backslash followed
by a backquote as end of raw string literal, as it does not
support syntax-propertize-function which Go-mode uses to
remove special meaning from backslashes in ``.
This patch provides a fallback mechanism to do the same thing
using font-lock-syntactic-keywords, which is supported by
Emacs 23.
LGTM=dominik.honnef
R=golang-codereviews, dominik.honnef
CC=adonovan, golang-codereviews
https://golang.org/cl/78730048
This patch includes fixes pointed out in CL 52140043, which was
originally written by john.gosset.
LGTM=minux.ma
R=golang-codereviews, minux.ma
CC=golang-codereviews
https://golang.org/cl/80320043
If someone configures a 'textwidth' in go files, vim will by default insert
newlines into long lines as you type, which breaks syntax and doesn't really
make sense for go code. This fixes the default.
LGTM=dsymonds
R=golang-codereviews, gobot, dsymonds
CC=golang-codereviews
https://golang.org/cl/76890046
"env" is a valid go command. This patch is to make bash to autocomplete it.
LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/74660045
This broke when we renamed the tool, and I missed this fix when I
fixed darwin last week.
LGTM=minux.ma, bradfitz
R=golang-codereviews, minux.ma, bradfitz
CC=golang-codereviews
https://golang.org/cl/70670043
We're about to commit some wide-sweeping changes to the go-tour and I
would rather not include them in Go 1.2.1, which is due in the next
week or so.
Also fix the makerelease tool; it has been broken since it was
renamed from bindist.
LGTM=campoy
R=campoy
CC=golang-codereviews
https://golang.org/cl/68780043
Fix build for 10.6 Darwin builders and OpenBSD builers.
LGTM=jsing
R=golang-codereviews, dave, jsing
CC=golang-codereviews
https://golang.org/cl/67710043
c-mode classically uses ff-find-other-file to toggle between headers
and implementation. For Go it seemingly makes sense to jump between
implementation and test.
While there's no enforced mapping of file names for tests, the mapping
in this CL seems to be very common at least throughout the standard
library, and ff-find-other-file fails gracefully when the mapping
doesn't apply.
LGTM=adonovan
R=adonovan
CC=golang-codereviews
https://golang.org/cl/65750044
Better sampling of objects that are close in size to sampling rate.
See the comment for details.
LGTM=rsc
R=golang-codereviews, rsc
CC=golang-codereviews
https://golang.org/cl/43830043
In external link mode the linker explicitly adds the string
constant "runtime/cgo". It adds the string constant using the
same symbol name as the compiler, but a different format. The
compiler assumes that the string data immediately follows the
string header, but the linker puts the two in different
sections. The result is bad string data when the compiler
sees "runtime/cgo" used as a string constant.
The compiler assumption is in datastring in [568]g/gobj.c.
The linker layout is in addstrdata in ld/data.c. The compiler
assumption is valid for string literals. The linker is not
creating a string literal, so its assumption is also valid.
There are a few ways to avoid this problem. This patch fixes
it by only doing the fake import of runtime/cgo if necessary,
and by only creating the string symbol if necessary.
Fixes#7234.
LGTM=dvyukov
R=golang-codereviews, dvyukov, bradfitz
CC=golang-codereviews
https://golang.org/cl/58410043
NPTL uses SIGRTMIN (signal 32) to effect thread cancellation.
Go's runtime replaces NPTL's signal handler with its own, and
ends up aborting if a C library that ends up calling
pthread_cancel is used.
This patch prevents runtime from replacing NPTL's handler.
Fixes#6997.
R=golang-codereviews, iant, dvyukov
CC=golang-codereviews
https://golang.org/cl/47540043
Require at least one space after "type" and do not fontify closing
parenthesis of type switch as a type.
R=adonovan
CC=golang-codereviews
https://golang.org/cl/37720050
Since version 6.5, npp change the Function List syntax for User Defined Languages.
We need use userDefinedLangName syntax in association tag in Notepad++ 6.5.
Fix issue 6735.
R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/22770043
This step makes it possible to upload the -osx10.x binaries
separately to their construction (after signing, for example).
R=golang-dev, dsymonds
CC=golang-dev
https://golang.org/cl/28160043
- Use #' for function symbols
- Remove unused variables
- Use declare-function to shut up byte compiler
This is identical to CL 19010044 with one exception: Making sure
it doesn't break on Emacs 22.1
R=adonovan, bradfitz, shendaras
CC=golang-dev
https://golang.org/cl/20100043
Clang does not record the "size" field for pointer types,
so we must insert the size ourselves. We were already
doing this, but only for the case of pointer types.
For an array of pointer types, the setting of the size for
the nested pointer type was happening after the computation
of the size of the array type, meaning that the array type
was always computed as 0 bytes. Delay the size computation.
This bug happens on all Clang systems, not just FreeBSD.
Our test checked that cgo wrote something, not that it was correct.
FreeBSD's default clang rejects array[0] as a C struct field,
so it noticed the incorrect sizes. But the sizes were incorrect
everywhere.
Update testcdefs to check the output has the right semantics.
Fixes#6292.
R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/22840043
bradfitz reports:
> It breaks go-mode on GNU Emacs 22.1.1 as ships with OS X 10.8.6.
««« original CL description
misc/emacs: various cleanups
- Use #' for function symbols
- Remove unused variables
- Use declare-function to shut up byte compiler
R=adonovan
CC=golang-dev
https://golang.org/cl/19010044
»»»
R=bradfitz
CC=golang-dev
https://golang.org/cl/19640043
- Use #' for function symbols
- Remove unused variables
- Use declare-function to shut up byte compiler
R=adonovan
CC=golang-dev
https://golang.org/cl/19010044
The newest version of godef supports jumping to a package's source
directory if point is on an import statement.
R=adonovan
CC=golang-dev
https://golang.org/cl/18230043
Prevent linkcheck from following redirects that lead beyond the outside
the root URL.
Return a non-zero exit code when there are problems.
Some minor refactoring for clarity.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/14425049
The old approach to determining whether "name" was a type, constant,
or expression was to compile the C program
name;
and scan the errors and warnings generated by the compiler.
This requires looking for specific substrings in the errors and warnings,
which ties the implementation to specific compiler versions.
As compilers change their errors or drop warnings, cgo breaks.
This happens slowly but it does happen.
Clang in particular (now required on OS X) has a significant churn rate.
The new approach compiles a slightly more complex program
that is either valid C or not valid C depending on what kind of
thing "name" is. It uses only the presence or absence of an error
message on a particular line, not the error text itself. The program is:
// error if and only if name is undeclared
void f1(void) { typeof(name) *x; }
// error if and only if name is not a type
void f2(void) { name *x; }
// error if and only if name is not an integer constant
void f3(void) { enum { x = (name)*1 }; }
I had not been planning to do this until Go 1.3, because it is a
non-trivial change, but it fixes a real Xcode 5 problem in Go 1.2,
and the new code is easier to understand than the old code.
It should be significantly more robust.
Fixes#6596.
Fixes#6612.
R=golang-dev, r, james, iant
CC=golang-dev
https://golang.org/cl/15070043
Ensure that clang always exits with a non-zero status by
giving it something that it always warns about (the statement "1;").
Fixes#6128.
R=golang-dev, iant, minux.ma
CC=golang-dev
https://golang.org/cl/14702043
Also add the action's object directory to the list of
directories we use to find SWIG shared libraries.
Fixes#6521.
R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/14369043
Fixes a bug in cgo on OS X using clang.
See golang.org/issue/6472 for details.
Fixes#6472.
R=golang-dev, iant
CC=golang-dev
https://golang.org/cl/14575043
The Go compiler emits extra information for this case:
imported and not used: "sandbox/foo_bar" as bar
R=adonovan
CC=golang-dev
https://golang.org/cl/14111043
so that we don't need worry about specifying the required
libc version (note: as cmd/go will still be dynamically
linked to libc, we still need to perform the build on OSes
with an old enough libc. But as cmd/go doesn't rely on many
libc symbols, the situation should be significantly better).
Fixes#3564.
R=golang-dev, adg
CC=golang-dev
https://golang.org/cl/14261043
notepadplus can only support some normal golang's hex and imaginary numbers.
it can't detect some special number, eg. 1./1.e/1.i/1+0.1i (omit "0" in ".0").
R=golang-dev, gvdschoot
CC=ajstarks, golang-dev
https://golang.org/cl/13401047
This will allow us to cut binaries with names like:
go1.2rc1.darwin-amd64-osx10.6.pkg
go1.2rc1.darwin-amd64-osx10.8.pkg
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/13629045
Because we can, and because it otherwise might crash
the program if we think we're out of memory.
Fixes#6390.
R=golang-dev, iant, minux.ma
CC=golang-dev
https://golang.org/cl/13345048
This is not quite what that issue reports,
because this does not involve a DLL.
But I wanted to make sure this much was working.
Update #4339
R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/13653043
Use either LWP::UserAgent or curl to make HTTP requests so it
works on Windows (most Perl distros include LWP::UserAgent),
and also on OS X (whose Perl at least sometimes doesn't
include LWP::UserAgent).
Fixes#6273
R=golang-dev, alex.brainman, cldorian
CC=golang-dev
https://golang.org/cl/13330044
Removed posix assumptions in temporary file generation
Removed curl dependence
Changed opening of svg file
These must now work including symbol resolution.
[1] go tool pprof <prog_name> http://.../debug/pprof/profile
[2] go tool pprof http://.../debug/pprof/profile
Fixes 6177.
R=golang-dev, alex.brainman, bradfitz, kamil.kisiel
CC=golang-dev
https://golang.org/cl/13085043
Some users have multiple Go development trees and invoke the
'go' tool via a wrapper that sets GOROOT and GOPATH based on
the current directory. Such users should customize go-command
to point to the wrapper script.
R=dominik.honnef
CC=golang-dev
https://golang.org/cl/13233043
If xcode-select is available, use it to determine the path to the
DVTFoundation.xcplugindata file.
Fixes#5997.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/12741047
When the coverage report file is older than the file we're
showing the coverage report for, then we show a simple message
to state this fact.
R=adonovan, dominik.honnef, bradfitz
CC=golang-dev
https://golang.org/cl/12919044
When identifying structs or interfaces we really want to know
their makeup, not just their name.
R=adonovan
CC=golang-dev
https://golang.org/cl/13042043
Jumps to the same file will use the original buffer, not the
coverage buffer. Making it work for the coverage buffer isn't
worth the trouble, especially because it would break as soon as
you jump to a different file and back.
Use error instead of message so it actually terminates
R=adonovan
CC=golang-dev
https://golang.org/cl/13041043
* Add a new kind of Name, "fpvar" which stands for function pointer variable
* When walking the AST, find functions used as expressions and create a new Name object for them
* Track functions which are only used in expr contexts, and avoid generating bridge code for them
R=golang-dev, minux.ma, fullung, rsc, iant
CC=golang-dev
https://golang.org/cl/9835047
Use the same algorithm that go tool cover uses when producing HTML
output to render coverage intensity.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/12712043
