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2019-11-01Merge release-20190806.1-358-ga99d347 (automated)gVisor bot
2019-10-31Add context to state.Adin Scannell
PiperOrigin-RevId: 277840416
2019-10-29Merge release-20190806.1-342-gd7f5e82 (automated)gVisor bot
2019-10-29Fix grammar in comment.Dean Deng
Missing "for". PiperOrigin-RevId: 277358513
2019-10-29Merge release-20190806.1-333-g29273b0 (automated)gVisor bot
2019-10-29Disallow execveat on interpreter scripts with fd opened with O_CLOEXEC.Dean Deng
When an interpreter script is opened with O_CLOEXEC and the resulting fd is passed into execveat, an ENOENT error should occur (the script would otherwise be inaccessible to the interpreter). This matches the actual behavior of Linux's execveat. PiperOrigin-RevId: 277306680
2019-10-28Merge release-20190806.1-330-g198f1cd (automated)gVisor bot
2019-10-28Update commentMichael Pratt
FDTable.GetFile doesn't exist. PiperOrigin-RevId: 277089842
2019-10-26Merge release-20190806.1-329-g1c480ab (automated)gVisor bot
2019-10-25Aggregate arguments for loading executables into a single struct.Dean Deng
This change simplifies the function signatures of functions related to loading executables, such as LoadTaskImage, Load, loadBinary. PiperOrigin-RevId: 276821187
2019-10-24Merge release-20190806.1-318-gd9fd536 (automated)gVisor bot
2019-10-24Handle AT_SYMLINK_NOFOLLOW flag for execveat.Dean Deng
PiperOrigin-RevId: 276441249
2019-10-23Merge release-20190806.1-309-gfbe6b50 (automated)gVisor bot
2019-10-23Keep minimal available fd to accelerate fd allocationDarcySail
Use fd.next to store the iteration start position, which can be used to accelerate allocating new FDs. And adding the corresponding gtest benchmark to measure performance. @tanjianfeng COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/758 from DarcySail:master 96685ec7886dfe1a64988406831d3bc002b438cc PiperOrigin-RevId: 276351250
2019-10-21Merge release-20190806.1-296-ga9358ce (automated)gVisor bot
2019-10-19Merge release-20190806.1-294-g652f7b1 (automated)gVisor bot
2019-10-19Add support for pipes in VFS2.Kevin Krakauer
PiperOrigin-RevId: 275650307
2019-10-17Merge release-20190806.1-286-gdfdbdf1 (automated)gVisor bot
2019-10-17Refactor pipe to support VFS2.Kevin Krakauer
* Pulls common functionality (IO and locking on open) into pipe_util.go. * Adds pipe/vfs.go, which implements a subset of vfs.FileDescriptionImpl. A subsequent change will add support for pipes in memfs. PiperOrigin-RevId: 275322385
2019-10-16Reorder BUILD license and load functions in gvisor.Kevin Krakauer
PiperOrigin-RevId: 275139066
2019-10-10Merge release-20190806.1-259-gf8b1859 (automated)gVisor bot
2019-10-10Fix signalfd polling.Adin Scannell
The signalfd descriptors otherwise always show as available. This can lead programs to spin, assuming they are looking to see what signals are pending. Updates #139 PiperOrigin-RevId: 274017890
2019-10-08Merge release-20190806.1-246-g1de0cf3 (automated)gVisor bot
2019-10-07Remove unnecessary context parameter for new pipes.Kevin Krakauer
PiperOrigin-RevId: 273421634
2019-10-01Merge release-20190806.1-225-g0d48398 (automated)gVisor bot
2019-10-01Include AT_SECURE in the aux vectorMichael Pratt
gVisor does not currently implement the functionality that would result in AT_SECURE = 1, but Linux includes AT_SECURE = 0 in the normal case, so we should do the same. PiperOrigin-RevId: 272311488
2019-10-01Merge release-20190806.1-221-gdd69b49 (automated)gVisor bot
2019-10-01Disable cpuClockTicker when app is idleMichael Pratt
Kernel.cpuClockTicker increments kernel.cpuClock, which tasks use as a clock to track their CPU usage. This improves latency in the syscall path by avoid expensive monotonic clock calls on every syscall entry/exit. However, this timer fires every 10ms. Thus, when all tasks are idle (i.e., blocked or stopped), this forces a sentry wakeup every 10ms, when we may otherwise be able to sleep until the next app-relevant event. These wakeups cause the sentry to utilize approximately 2% CPU when the application is otherwise idle. Updates to clock are not strictly necessary when the app is idle, as there are no readers of cpuClock. This commit reduces idle CPU by disabling the timer when tasks are completely idle, and computing its effects at the next wakeup. Rather than disabling the timer as soon as the app goes idle, we wait until the next tick, which provides a window for short sleeps to sleep and wakeup without doing the (relatively) expensive work of disabling and enabling the timer. PiperOrigin-RevId: 272265822
2019-09-27Merge release-20190806.1-204-g6a54aa1 (automated)gVisor bot
2019-09-23internal BUILD file cleanup.gVisor bot
PiperOrigin-RevId: 270680704
2019-09-19Merge release-20190806.1-159-g0a8a75f (automated)gVisor bot
2019-09-19Job control: controlling TTYs and foreground process groups.Kevin Krakauer
Adresses a deadlock with the rolled back change: https://github.com/google/gvisor/commit/b6a5b950d28e0b474fdad160b88bc15314cf9259 Creating a session from an orphaned process group was causing a lock to be acquired twice by a single goroutine. This behavior is addressed, and a test (OrphanRegression) has been added to pty.cc. Implemented the following ioctls: - TIOCSCTTY - set controlling TTY - TIOCNOTTY - remove controlling tty, maybe signal some other processes - TIOCGPGRP - get foreground process group. Also enables tcgetpgrp(). - TIOCSPGRP - set foreground process group. Also enabled tcsetpgrp(). Next steps are to actually turn terminal-generated control characters (e.g. C^c) into signals to the proper process groups, and to send SIGTTOU and SIGTTIN when appropriate. PiperOrigin-RevId: 270088599
2019-09-18Merge release-20190806.1-156-gc98e7f0 (automated)gVisor bot
2019-09-18Signalfd supportAdin Scannell
Note that the exact semantics for these signalfds are slightly different from Linux. These signalfds are bound to the process at creation time. Reads, polls, etc. are all associated with signals directed at that task. In Linux, all signalfd operations are associated with current, regardless of where the signalfd originated. In practice, this should not be an issue given how signalfds are used. In order to fix this however, we will need to plumb the context through all the event APIs. This gets complicated really quickly, because the waiter APIs are all netstack-specific, and not generally exposed to the context. Probably not worthwhile fixing immediately. PiperOrigin-RevId: 269901749
2019-09-13Merge release-20190806.1-142-g7c6ab6a (automated)gVisor bot
2019-09-12Implement splice methods for pipes and sockets.Adin Scannell
This also allows the tee(2) implementation to be enabled, since dup can now be properly supported via WriteTo. Note that this change necessitated some minor restructoring with the fs.FileOperations splice methods. If the *fs.File is passed through directly, then only public API methods are accessible, which will deadlock immediately since the locking is already done by fs.Splice. Instead, we pass through an abstract io.Reader or io.Writer, which elide locks and use the underlying fs.FileOperations directly. PiperOrigin-RevId: 268805207
2019-09-12Remove go_test from go_stateify and go_marshalMichael Pratt
They are no-ops, so the standard rule works fine. PiperOrigin-RevId: 268776264
2019-09-09Merge 9dfcd8b0 (automated)gVisor bot
2019-09-09Merge 3733b9b8 (automated)gVisor bot
2019-09-09Merge 6af9a985 (automated)gVisor bot
2019-09-06Merge 98f7fbb5 (automated)gVisor bot
2019-09-06Merge 0bfffbcb (automated)gVisor bot
2019-09-06Merge 7e94f171 (automated)gVisor bot
2019-09-04Merge 144127e5 (automated)gVisor bot
2019-09-03Merge 3789c34b (automated)gVisor bot
2019-09-03Merge eb94066e (automated)gVisor bot
2019-09-03Merge 648170f5 (automated)gVisor bot
2019-08-31Merge 0352cf58 (automated)gVisor bot
2019-08-31Merge f3dabdfc (automated)gVisor bot
2019-08-30Automated rollback of changelist 261387276Bhasker Hariharan
PiperOrigin-RevId: 266491264
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