Change-Id: I583e167dac033037e82e55a9ae6c6f0c47a34c7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/428293
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Switch to the more Go-style name to match inlinedCall.nameOff.
Change-Id: I2115b27af8309e1ead7d61ecc65fe4fc966030f7
Reviewed-on: https://go-review.googlesource.com/c/go/+/428657
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The meaning of this field is unchanged, this CL simply gives it a more
descriptive name, as func_ makes it sound like a reference to the _func.
Change-Id: I70e54f34bede7636ce4d7b9dd0f7557308f02143
Reviewed-on: https://go-review.googlesource.com/c/go/+/427961
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If test would fail, the error message will have wrong error and its
type, because e is used after the failed type assertion.
To fix, use the original err.
While at it,
- combine the checks for error type and value into one statement;
- use the standard "got ..., want ..." format.
Fixes: 212d2f82e0 ("os: add ErrClosed, return for use of closed File")
Change-Id: I862a96607b461ab89cce6bed2443b28aa2c16468
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It was fixed by CL 422196, and have been already worked in unified IR.
Fixes#54911
Change-Id: Ie69044a64b296f6961e667e7661d8c4d1a24d84e
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Change-Id: Ie100a2a6f272b84fa2da6ac7b64452985242d788
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Change-Id: I2ed993a804dd830b9ff445c467eb224b7aaa3401
Reviewed-on: https://go-review.googlesource.com/c/go/+/428273
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This reverts commit CL 427140.
Reason for revert: Comments say that done should be the first field.
Change-Id: Id131da064146b44e1182289546aeb877867e63cc
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Change-Id: I610509aa35c345ff7fbb1fc94bf177ffbe934731
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Change-Id: I0d1195fcb4eceb12c4be3190b05a82079dc496a3
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Change-Id: I88b55f61eccb5764cac2a9397fd99a62f8735a9a
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In particular, (SEQZ (SNEZ x)) can arise from (Not (IsNonNil x)).
Change-Id: Ie249cd1934d71087e0f774cf8f6c937ceeed7ad5
Reviewed-on: https://go-review.googlesource.com/c/go/+/428215
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LoweredAtomicLoad8 is implemented using MOVBU, hence it is already zero
extended. LoweredAtomicCas32 and LoweredAtomicCas64 return a properly
typed boolean.
Change-Id: Ie0acbaa19403d59c7e5f76d060cc13ee51eb7834
Reviewed-on: https://go-review.googlesource.com/c/go/+/428214
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Implement Slicemask the same way every other architecture does - negate
then arithmetic right shift. This sets or clears the sign bit, before
extending it to the entire register.
Removes around 2,500 instructions from the Go binary on linux/riscv64.
Change-Id: I4d675b826e7eb23fe2b1e6e46b95dcd49ab49733
Reviewed-on: https://go-review.googlesource.com/c/go/+/426354
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Updates #54854
Change-Id: Ibaf4eea14a6259cdbca79e9e95db1602966f18e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/428176
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Updates #54854
Change-Id: Ie18665e93e477b6f220acf4c6c070b2af4343064
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Updates #54854
Change-Id: I9c14f9fa595f73eae44eb714abc5d486915893c1
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Change-Id: I840262eefff1073a452a243b9e31f61b53362fcf
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Change-Id: Ieb15b54d36f18d1fbccbafe5451a4758df797718
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Change-Id: If675277e17b97500100e46ec6fe471260131bafc
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Change-Id: I24fb36a0591782c07f26c3289265aa41a643666d
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Change-Id: Ic463bd6d52e7d1d50d2dbd2122b4d514e0b4af60
Reviewed-on: https://go-review.googlesource.com/c/go/+/428755
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Change-Id: I251f734adbaf83aa03e3f4f37add4e116f5af093
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Having an executable bit set for a binary is not enough for it to be
executable -- there might be more checks in the kernel. For example,
binaries on a filesystem mounted with "noexec" flag couldn't be
executed. There might be other scenarios involving ACLs, SELinux,
file capabilities, and so on.
As a result, LookPath might either find a non-executable (while going
over $PATH elements), or return a false positive that the argument
provided is an executable.
One possible fix would be to perform the check by using access(2)
syscall with X_OK flag.
Now, since access(2) uses real (rather than effective) uid and gid,
when used by a setuid or setgid binary, it checks permissions of the
(real) user who started the binary, rather than the actual effective
permissions. Therefore, using access with X_OK won't work as expected
for setuid/setgid binaries.
To fix this, modern platforms added ways to check against effective uid
and gid, with the most common being the faccessat(2) call with the
AT_EACCESS flag, as described by POSIX.1-2008 (in Linux, only
faccessat2(2) supports flags such as AT_EACCESS). Let's use it, and fall
back to checking permission bits if faccessat is not available.
Wrap the logic into unix.Eaccess, which is currently only implemented on
Linux. While many other OSes (Free/Net/OpenBSD, AIX, Solaris/Illumos, and
Darwin) do implement faccessat(2) with AT_EACCESS, it is not wired in
syscall package (except for AIX), so these platforms are left out for now.
In the future, eaccess can be implemented for these OSes, too.
Alas, a call to unix.Eaccess is not enough since we have to filter out
directories, so use both stat and Eaccess.
One minor change introduced by this commit is that LookPath and Command
now returns "is a directory" error when the argument contains a slash
and is a directory. This is similar to what e.g. bash does on Linux:
$ bash -c /etc
bash: line 1: /etc: Is a directory
Add a test case, which, unfortunately, requires root, is specific to
Linux, and needs a relatively new kernel (supporting faccessat2). Other
platforms either have different semantics for tmpfs with noexec, or have
different ways to set up a binary which has x bit set but nevertheless
could not be executed.
Change-Id: If49b6ef6bf4dd23b2c32bebec8832d83e511a4bb
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Change-Id: I754edcf21e003a3f4037fb2c5d8d06f2cd5f2fa3
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Change-Id: I3861a73d6b9d1d454c42bec50099b916bf30f1cd
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The parent, file, and line fields are no longer used now that we have
parentPc to find the parent and NOPs in the parent to attach file/line
pcdata to.
Removing these fields reduces the binary size of cmd/go on linux-amd64
by 1.1%.
Fixes#54849.
Change-Id: If58f08622736b2b322288608776f8bedf0c3fd17
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For defer/go calls, the function/method value are evaluated immediately.
So after devirtualizing, it may trigger a panic when implicitly deref
a nil pointer receiver, causing the program behaves unexpectedly.
It's safer to not devirtualizing defer/go calls at all.
Fixes#52072
Change-Id: I562c2860e3e577b36387dc0a12ae5077bc0766bf
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Change-Id: I5d4c89a8d87a8697d038bf91b17d7ffc847a49c7
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Change-Id: I9658c37a548a386c57d83dc13d5e9925a9c13211
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Change-Id: I05ebaf4e11b5b6ca7d9bbb0b2241def7773b11cc
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The writev syscall is available since at least Solaris 11.3.
Reuse the existing illumos writev wrapper on solaris to implement
internal/poll.writev for net.(*netFD).writeBuffers.
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Change-Id: I407d11b43349cd78b709deb7b0e774bd93922caa
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