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path: root/pkg/sentry/kernel/futex
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2020-01-09New sync package.Ian Gudger
* Rename syncutil to sync. * Add aliases to sync types. * Replace existing usage of standard library sync package. This will make it easier to swap out synchronization primitives. For example, this will allow us to use primitives from github.com/sasha-s/go-deadlock to check for lock ordering violations. Updates #1472 PiperOrigin-RevId: 289033387
2019-11-21Import and structure cleanup.Adin Scannell
PiperOrigin-RevId: 281795269
2019-10-16Reorder BUILD license and load functions in gvisor.Kevin Krakauer
PiperOrigin-RevId: 275139066
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
2019-07-09build: add nogo for static validationAdin Scannell
PiperOrigin-RevId: 257297820
2019-07-03futex: compare keys for equality when doing a FUTEX_UNLOCK_PI.Neel Natu
PiperOrigin-RevId: 256453827
2019-06-13Update canonical repository.Adin Scannell
This can be merged after: https://github.com/google/gvisor-website/pull/77 or https://github.com/google/gvisor-website/pull/78 PiperOrigin-RevId: 253132620
2019-04-29Change copyright notice to "The gVisor Authors"Michael Pratt
Based on the guidelines at https://opensource.google.com/docs/releasing/authors/. 1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./' 2. Manual fixup of "Google Inc" references. 3. Add AUTHORS file. Authors may request to be added to this file. 4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS. Fixes #209 PiperOrigin-RevId: 245823212 Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
2019-03-05Priority-inheritance futex implementationFabricio Voznika
It is Implemented without the priority inheritance part given that gVisor defers scheduling decisions to Go runtime and doesn't have control over it. PiperOrigin-RevId: 236989545 Change-Id: I714c8ca0798743ecf3167b14ffeb5cd834302560
2019-01-31Move package sync to third_partyMichael Pratt
PiperOrigin-RevId: 231889261 Change-Id: I482f1df055bcedf4edb9fe3fe9b8e9c80085f1a0
2019-01-31Remove license commentsMichael Pratt
Nothing reads them and they can simply get stale. Generated with: $ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD PiperOrigin-RevId: 231818945 Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
2018-11-20Update futex to use usermem abstractions.Adin Scannell
This eliminates the indirection that existed in task_futex. PiperOrigin-RevId: 221832498 Change-Id: Ifb4c926d493913aa6694e193deae91616a29f042
2018-10-19Use correct company name in copyright headerIan Gudger
PiperOrigin-RevId: 217951017 Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
2018-10-08Implement shared futexes.Jamie Liu
- Shared futex objects on shared mappings are represented by Mappable + offset, analogous to Linux's use of inode + offset. Add type futex.Key, and change the futex.Manager bucket API to use futex.Keys instead of addresses. - Extend the futex.Checker interface to be able to return Keys for memory mappings. It returns Keys rather than just mappings because whether the address or the target of the mapping is used in the Key depends on whether the mapping is MAP_SHARED or MAP_PRIVATE; this matters because using mapping target for a futex on a MAP_PRIVATE mapping causes it to stop working across COW-breaking. - futex.Manager.WaitComplete depends on atomic updates to futex.Waiter.addr to determine when it has locked the right bucket, which is much less straightforward for struct futex.Waiter.key. Switch to an atomically-accessed futex.Waiter.bucket pointer. - futex.Manager.Wake now needs to take a futex.Checker to resolve addresses for shared futexes. CLONE_CHILD_CLEARTID requires the exit path to perform a shared futex wakeup (Linux: kernel/fork.c:mm_release() => sys_futex(tsk->clear_child_tid, FUTEX_WAKE, ...)). This is a problem because futexChecker is in the syscalls/linux package. Move it to kernel. PiperOrigin-RevId: 216207039 Change-Id: I708d68e2d1f47e526d9afd95e7fed410c84afccf
2018-09-04Distinguish Element and Linker for ilist.Adin Scannell
Furthermore, allow for the specification of an ElementMapper. This allows a single "Element" type to exist on multiple inline lists, and work without having to embed the entry type. This is a requisite change for supporting a per-Inode list of Dirents. PiperOrigin-RevId: 211467497 Change-Id: If2768999b43e03fdaecf8ed15f435fe37518d163
2018-08-02Automated rollback of changelist 207037226Zhaozhong Ni
PiperOrigin-RevId: 207125440 Change-Id: I6c572afb4d693ee72a0c458a988b0e96d191cd49
2018-08-01Automated rollback of changelist 207007153Michael Pratt
PiperOrigin-RevId: 207037226 Change-Id: I8b5f1a056d4f3eab17846f2e0193bb737ecb5428
2018-08-01stateify: convert all packages to use explicit mode.Zhaozhong Ni
PiperOrigin-RevId: 207007153 Change-Id: Ifedf1cc3758dc18be16647a4ece9c840c1c636c9
2018-07-27stateify: support explicit annotation mode; convert refs and stack packages.Zhaozhong Ni
We have been unnecessarily creating too many savable types implicitly. PiperOrigin-RevId: 206334201 Change-Id: Idc5a3a14bfb7ee125c4f2bb2b1c53164e46f29a8
2018-06-19sentry: futex S/R optimization.Zhaozhong Ni
No need to save thousands of zerovalue buckets. PiperOrigin-RevId: 201258598 Change-Id: I5d3ea7b6a5345117ab4f610332d5288ca550be33
2018-04-28Check in gVisor.Googler
PiperOrigin-RevId: 194583126 Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
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