TestReadStdin always fill up buffer provided by ReadFile caller full.
But we do not know if real ReadFile does the same. Add tests where
buffer is only filled with limited data.

Change-Id: I0fc776325c2b1fe60511126c439f4b0560e9d653
Reviewed-on: https://go-review.googlesource.com/33030Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

CIDRMask just returns a mask which corresponds to an address
prefix in CIDR nonation. A subnet for an IPv6 mask sounds a bit
confusing.

Change-Id: Ic7859ce992bc2de4043d3b25caf9a1051d118b0e
Reviewed-on: https://go-review.googlesource.com/33262Reviewed-by: Ian Lance Taylor <iant@golang.org>

If a program has had its text section split into multiple
sections then the ftab that is built is based on addresses
prior to splitting.  That means all the function addresses
are there and correct because of relocation but the
but the computed idx won't always match up quite right and
in some cases go beyond the end of the table, causing a panic.

To resolve this, determine if the idx is too large and if it is,
set it to the last index in ftab.  Then search backward to find the
matching function address.

Fixes #17854

Change-Id: I6940e76a5238727b0a9ac23dc80000996db2579a
Reviewed-on: https://go-review.googlesource.com/32972Reviewed-by: David Chase <drchase@google.com>

For #13057.

Change-Id: Idbc50d5b08e055a23ab7cc9eb62dbc47b65b1815
Reviewed-on: https://go-review.googlesource.com/29050Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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It's possible for the pkgPath of a field to be different than that of
the struct type as a whole. In that case, store the field's pkgPath in
the name field. Use the field's pkgPath when setting PkgPath and when
checking for type identity.

Fixes #17952.

Change-Id: Iebaf92f0054b11427c8f6e4158c3bebcfff06f45
Reviewed-on: https://go-review.googlesource.com/33333
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: David Crawshaw <crawshaw@golang.org>

Fixes #16934.

Change-Id: I725704e4c4aae7023fd89edc42af7ba0d242fec8
Reviewed-on: https://go-review.googlesource.com/33327Reviewed-by: Rob Pike <r@golang.org>

Updates #17243

Change-Id: Iaa737874e75fdac73452f1fc13a5749e8df78ebe
Reviewed-on: https://go-review.googlesource.com/33332
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Reviewed-by: Ian Lance Taylor <iant@golang.org>
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Failing to create the output file would give confusing errors such as:

	cover: invalid argument

Also do out.Close() even if Execute() errored.

Fixes #17951.

Change-Id: I897e1d31f7996871c54fde7cb09614cafbf6c3fc
Reviewed-on: https://go-review.googlesource.com/33278Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>

The previous documentation purported to convert underlying strings to
[]byte, which it did not do. This adds support for underlying bool,
string, and []byte, which convert directly to their underlying type.

Fixes #15174.

Change-Id: I7fc4e2520577f097a48f39c9ff6c8160fdfb7be4
Reviewed-on: https://go-review.googlesource.com/27812Reviewed-by: Daniel Theophanes <kardianos@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>

I had trouble translating the documentation language into a subnet
- e.g. whether /31 was CIDRMask(1, 31) or CIDRMask(1, 32) or
CIDRMask(31, 32) so I thought I'd add a short example showing how to
create the right masks.

Change-Id: Ia6a6de08c5c30b6d2249b3194cced2d3c383e317
Reviewed-on: https://go-review.googlesource.com/32677Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Zero out the sigaction structs, in case the sa_restorer field is set.

Clear the SA_RESTORER flag; it is part of the kernel interface, not the
libc interface.

Fixes #17947.

Change-Id: I610348ce3c196d3761cf2170f06c24ecc3507cf7
Reviewed-on: https://go-review.googlesource.com/33331
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Bryan Mills <bcmills@google.com>

It's too flaky and doing more harm than good.

Disable it until it can be made reliable.

Updates #17948
Updates #17927

Change-Id: Iaab7f09a4060da377fcd3ca2262527fef50c558d
Reviewed-on: https://go-review.googlesource.com/33330Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Do not retain a lock when driver.Stmt.Close panic as the rest
of the sql package ensures.

Updates #16019

Change-Id: Idc7ea9258ae23f491e79cce3efc365684a708428
Reviewed-on: https://go-review.googlesource.com/33328
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

This is a followup to CL 33257.

It looks like active close operation at passive open side sometimes
takes a bit long time on Darwin.

Fixes #17948.

Change-Id: Ida17639c4e66a43e1be1f74fd0ef3baddde25092
Reviewed-on: https://go-review.googlesource.com/33258
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Autotmp filtering was too aggressive and excluded types
necessary to make debuggers work properly.  Restore the
"late filter" in dwarf.go based on names to exclude autotmps,
and remove the "early filter" in pgen.go based on how the
name was introduced.  However, the updated naming scheme
with a dot prefix is retained to prevent accidental clashes
with legal Go identifier names.

Includes test (grouped with runtime gdb tests),
verified to fail without the fix.

Updates #17644.
Fixes #17830.

Change-Id: I7ec3f7230083889660236e5f6bc77ba5fe434e93
Reviewed-on: https://go-review.googlesource.com/33233
Run-TryBot: David Chase <drchase@google.com>
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Reviewed-by: Matthew Dempsky <mdempsky@google.com>

The assembler backend fixes too-far conditional branches, but only
for BEQ and like. Add a case for CBZ and like.

Fixes #17925.

Change-Id: Ie516e6c5ca165b582367283a0110f7081e00c214
Reviewed-on: https://go-review.googlesource.com/33304
Run-TryBot: Cherry Zhang <cherryyz@google.com>
Reviewed-by: David Chase <drchase@google.com>

Fixes #17936

Change-Id: I20d09712b7d7303257994356904052ba64bc5bf2
Reviewed-on: https://go-review.googlesource.com/33306
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

This change makes use of synchronization primitive instead of
context-based canceling not to depend on defer execution scheduling.

Fixes #17927.

Change-Id: I5ca9287a48bb5cdda6845a7f12757f95175c5db8
Reviewed-on: https://go-review.googlesource.com/33257Reviewed-by: Ian Lance Taylor <iant@golang.org>

Like GOARM=5 does.

Fixes #17944

Change-Id: Ica2a54a90fbd4a29471d1c6009ace2fcc5e82a73
Reviewed-on: https://go-review.googlesource.com/33326Reviewed-by: Cherry Zhang <cherryyz@google.com>

These don't use any flags in TestMain itself, so the call is redundant
as M.Run will do it.

Change-Id: I00f2ac7f846dc2c3ad3535eb8177616b2d900149
Reviewed-on: https://go-review.googlesource.com/33275Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

To generate the correct section offset the shared code path for
R_CALL, R_PCREL, and R_GOTPCREL on darwin when externally linking
walks up the symbol heirarchy adding the differences. This is fine,
except in the case where we are generating a GOT lookup, because
the topmost symbol is left in r.Xsym instead of the symbol we are
looking up. So all funcsym GOT lookups were looking up the outer
"go.func.*" symbol.

Fix this by separating out the R_GOTPCREL code path.

For #17828 (and may fix it).

Change-Id: I2c9f4d135e77c17270aa064d8c876dc6d485d659
Reviewed-on: https://go-review.googlesource.com/33211
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>

Fixes #16346.

Change-Id: Ie75a4ae7011036dd2c1f121a7a5e38d10177721e
Reviewed-on: https://go-review.googlesource.com/33296Reviewed-by: Daniel Theophanes <kardianos@gmail.com>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The use of these has been removed in recent commits.

Change-Id: Iff36a3ee4dcdfe39c40e93e2601f44d3c59f7024
Reviewed-on: https://go-review.googlesource.com/33274
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

The test requires tons of memory and results various failures, mainly
runtime errors and process termination by SIGKILL, caused by resource
exhaustion when the node under test doesn't have much resources.

This change makes use of -tcpbig flag to enable the test.

Change-Id: Id53fa5d88543e2e60ca9bb4f55a1914ccca844e1
Reviewed-on: https://go-review.googlesource.com/33254Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

This ensures that runtime's signal handlers pass through the TSAN and
MSAN libc interceptors and subsequent calls to the intercepted
sigaction function from C will correctly see them.

Fixes #17753.

Change-Id: I9798bb50291a4b8fa20caa39c02a4465ec40bb8d
Reviewed-on: https://go-review.googlesource.com/33142Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>

Change-Id: I897237667ffe9e9b2a5f92251a6f665d29479fd2
Reviewed-on: https://go-review.googlesource.com/33255Reviewed-by: Ian Lance Taylor <iant@golang.org>

Add an explicit WriteString method to closeOnce that acquires the
writers lock.  This overrides the one promoted from the
embedded *os.File field.  The promoted one naturally does not acquire
the lock, and can therefore race with the Close method.

Fixes #17647.

Change-Id: I3460f2a0d503449481cfb2fd4628b4855ab0ecdf
Reviewed-on: https://go-review.googlesource.com/33298
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Both automated updates with a few tweaks.

Change-Id: I24579a8dcc32a84a4fff5c2212681ef30dda61d1
Reviewed-on: https://go-review.googlesource.com/33297Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Only exe buildmode without cgo supported.

Change-Id: Id104a79a99d3285c04db00fd98b8affa94ea3c37
Reviewed-on: https://go-review.googlesource.com/31487
Run-TryBot: Cherry Zhang <cherryyz@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>

Change-Id: Ie7512cc27436cde53b58686b32a0389849a365e4
Reviewed-on: https://go-review.googlesource.com/33249
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

These bind flags were removed by mistake in CL 2167.

Fixes #17921.

Change-Id: I1e8089dade30a212b8db0b216c8299946d924d4b
Reviewed-on: https://go-review.googlesource.com/33271Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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Change-Id: I05f31938f3736100bd8b20a150c9fe3a6ffcdeae
Reviewed-on: https://go-review.googlesource.com/33245Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

If a C union type (or a C++ class type) can contain a pointer field,
then run the cgo checks on pointers to that type. This will test the
pointer as though it were an unsafe.Pointer, and will crash if it points
to Go memory that contains a pointer.

Fixes #15942.

Change-Id: Ic2d07ed9648d4b27078ae7683e26196bcbc59fc9
Reviewed-on: https://go-review.googlesource.com/33237
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

Updates #17821

Change-Id: Iebd2e88b2d4f3d757ffad72456f4bfc0607d8110
Reviewed-on: https://go-review.googlesource.com/33162
Run-TryBot: David Crawshaw <crawshaw@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>

In plugins and every program that opens a plugin, include a hash of
every imported package.

There are two versions of each hash: one local and one exported.
As the program starts and plugins are loaded, the first exported
symbol for each package becomes the canonical version.

Any subsequent plugin's local package hash symbol has to match the
canonical version.

Fixes #17832

Change-Id: I4e62c8e1729d322e14b1673bada40fa7a74ea8bc
Reviewed-on: https://go-review.googlesource.com/33161Reviewed-by: Ian Lance Taylor <iant@golang.org>

Fixes #17900.

Change-Id: I42cda6ac9cf48ed739d3a015a90b3cb15edf8ddf
Reviewed-on: https://go-review.googlesource.com/33243
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>

I guess this was fixed at some point. Remove a skipped test in
net/http and add an explicit test in net.

Fixes #17695

Change-Id: Idb9f3e236b726bb45098474b830c95c1fce57529
Reviewed-on: https://go-review.googlesource.com/33242
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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Reviewed-by: Ian Lance Taylor <iant@golang.org>

Apparently when GOMAXPROCS == 1 a simple sched_yield in a tight loop is
not necessarily sufficient to permit a signal handler to run. Instead,
sleep for 1/1000 of a second.

Fixes #16649.

Change-Id: I83910144228556e742b7a92a441732ef61aa49d9
Reviewed-on: https://go-review.googlesource.com/33239
Run-TryBot: Ian Lance Taylor <iant@golang.org>
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This change redoes the fix for #16101 (CL 31092) in a different way by
making t.Clone return the template associated with the t.Name() while
allowing for the case that a template of the same name is define-d.

Fixes #17735.

Change-Id: I1e69672390a4c81aa611046a209008ae4a3bb723
Reviewed-on: https://go-review.googlesource.com/33210
Run-TryBot: Caleb Spare <cespare@gmail.com>
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Reviewed-by: Rob Pike <r@golang.org>

Change-Id: I9a42cb55544185ade20b2a4a9de5d39a6cfc6fc6
Reviewed-on: https://go-review.googlesource.com/33172Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>