mirror of https://github.com/grpc/grpc.git
Kerrick Staley
7 years ago
commit
f44f0bc592
70 changed files with 1263 additions and 184 deletions
@ -0,0 +1,28 @@ |
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/*
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* |
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* Copyright 2018 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#ifndef GRPC_CORE_LIB_GPR_ALLOC_H |
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#define GRPC_CORE_LIB_GPR_ALLOC_H |
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#include <grpc/support/port_platform.h> |
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/// Given a size, round up to the next multiple of sizeof(void*).
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#define GPR_ROUND_UP_TO_ALIGNMENT_SIZE(x) \ |
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(((x) + GPR_MAX_ALIGNMENT - 1u) & ~(GPR_MAX_ALIGNMENT - 1u)) |
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#endif /* GRPC_CORE_LIB_GPR_ALLOC_H */ |
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# gRPC iOS Network Transition Behaviors |
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Network connectivity on an iOS device may transition between cellular, WIFI, or |
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no network connectivity. This document describes how these network changes |
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should be handled by gRPC and current known issues. |
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## Expected Network Transition Behaviors |
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The expected gRPC iOS channel and network transition behaviors are: |
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* Channel connection to a particular host is established at the time of |
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starting the first call to the channel and remains connected for future calls |
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to the same host. |
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* If the underlying connection to the remote host is broken, the channel is |
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disconnected and enters TRANSIENT\_FAILURE state. |
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* A channel is broken if the channel connection is no longer viable. This |
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happens when |
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* The network interface is no longer available, e.g. WiFi or cellular |
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interface is turned off or goes offline, airplane mode turned on, etc; |
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* The underlying TCP connection is no longer valid, e.g. WiFi connects to |
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another hotspot, cellular data switched from LTE to 4G, etc; |
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* A network interface more preferable by the OS is valid, e.g. WiFi gets |
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connected when the channel is already connected via cellular. |
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* A channel in TRANSIENT\_FAILURE state attempts reconnection on start of the |
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next call to the same host, but only after a certain backoff period (see |
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corresponding |
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[doc](https://github.com/grpc/grpc/blob/master/doc/connection-backoff.md)). |
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During the backoff period, any call to the same host will wait until the |
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first of the following events occur: |
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* Connection succeeded; calls will be made using this channel; |
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* Conncetion failed; calls will be failed and return UNAVAILABLE status code; |
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* The call's deadline is reached; the call will fail and return |
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DEADLINE\_EXCEEDED status code. |
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The length of backoff period of a channel is reset whenever a connection |
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attempt is successful. |
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## Implementations |
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### gRPC iOS with TCP Sockets |
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gRPC's default implementation is to use TCP sockets for networking. It turns |
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out that although Apple supports this type of usage, it is [not recommended by |
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Apple](https://developer.apple.com/library/archive/documentation/NetworkingInternetWeb/Conceptual/NetworkingOverview/SocketsAndStreams/SocketsAndStreams.html) |
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and has some issues described below. |
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#### Issues with TCP Sockets |
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The TCP sockets on iOS is flawed in that it does not reflect the viability of |
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the channel connection. Particularly, we observed the following issues when |
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using TCP sockets: |
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* When a TCP socket connection is established on cellular data and WiFi |
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becomes available, the TCP socket neither return an error event nor continue |
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sending/receiving data on it, but still accepts write on it. |
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* A TCP socket does not report certain events that happen in the |
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background. When a TCP connection breaks in the background for the reason |
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like WiFi connects to another hotspot, the socket neither return an error nor |
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continue sending/receiving data on it, but still accepts write on it. |
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In both situations, the user will see the call hang for an extended period of |
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time before the TCP socket times out. |
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#### gRPC iOS library's resolution to TCP socket issues |
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We introduced |
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[`ConnectivityMonitor`](https://developer.apple.com/library/archive/documentation/NetworkingInternetWeb/Conceptual/NetworkingOverview/SocketsAndStreams/SocketsAndStreams.html) |
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in gRPC iOS library v0.14.0 to alleviate these issues in TCP sockets, |
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which changes the network transition behaviors a bit. |
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We classify network connectivity state of the device into three categories |
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based on flags obtained from `SCNetworkReachability` API: |
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| Reachable | ConnectionRequired | IsWWAN | **Category** | |
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|:---------:|:------------------:|:------:|:------------:| |
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| 0 | X | X | None | |
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| X | 1 | X | None | |
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| 1 | 0 | 0 | WiFi | |
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| 1 | 0 | 1 | Cellular | |
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Whenever there is a transition of network between two of these categories, all |
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previously existing channels are assumed to be broken and are actively |
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destroyed. If there is an unfinished call, the call should return with status |
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code `UNAVAILABLE`. |
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`ConnectivityMonitor` is able to detect the scenario of the first issue above |
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and actively destroy the channels. However, the second issue is not resolvable. |
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To solve that issue the best solution is to switch to CFStream implementation |
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which eliminates all of them. |
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### gRPC iOS with CFStream |
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gRPC iOS with CFStream implementation (introduced in v1.13.0) uses Apple's |
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networking API to make connections. It resolves the issues with TCP sockets |
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mentioned above. Users are recommended to use this implementation rather than |
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TCP socket implementation. The detailed behavior of streams in CFStream is not |
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documented by Apple, but our experiments show that it accords to the expected |
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behaviors. With CFStream implementation, an event is always received when the |
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underlying connection is no longer viable. For more detailed information and |
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usages of CFStream implementation, refer to the |
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[user guide](https://github.com/grpc/grpc/blob/master/src/objective-c/README-CFSTREAM.md). |
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[](https://cocoapods.org/pods/gRPC) |
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# gRPC Objective-C with CFStream |
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gRPC Objective-C library now provides the option to use Apple's CFStream API (rather than TCP |
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sockets) for networking. Using CFStream resolves a bunch of network connectivity transition issues |
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(see the [doc](https://github.com/grpc/grpc/blob/master/src/objective-c/NetworkTransitionBehavior.md) |
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for more information). |
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CFStream integration is now in experimental state. You will need explicit opt-in to use it to get |
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the benefits of resolving the issues above. We expect to make CFStream the default networking |
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interface that gRPC uses when it is ready for production. |
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## Usage |
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If you use gRPC following the instructions in |
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[README.md](https://github.com/grpc/grpc/blob/master/src/objective-c/README.md): |
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- Simply replace the |
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dependency on `gRPC-ProtoRPC` with `gRPC-ProtoRPC/CFStream`. The build system will take care of |
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everything else and switch networking to CFStream. |
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If your project directly depends on podspecs other than `gRPC-ProtoRPC` (e.g. `gRPC` or |
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`gRPC-Core`): |
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- Make your projects depend on subspecs corresponding to CFStream in each gRPC podspec. For |
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`gRPC-Core`, you will need to make sure that the completion queue you create is of type |
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`GRPC_CQ_NON_POLLING`. This is expected to be fixed soon so that you do not have to modify the |
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completion queue type. |
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## Notes |
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- Currently we do not support platforms other than iOS, although it is likely that this integration |
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can run on MacOS targets with Apple's compiler. |
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- Let us know if you meet any issue by filing issue and ping @muxi. |
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@ -0,0 +1,19 @@ |
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/*
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* |
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* Copyright 2015 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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int main(void) {} |
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@ -0,0 +1,19 @@ |
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/*
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* |
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* Copyright 2015 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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int main(void) {} |
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@ -0,0 +1,19 @@ |
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/*
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* |
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* Copyright 2015 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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int main(void) {} |
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@ -0,0 +1,115 @@ |
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/*
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* |
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* Copyright 2018 gRPC authors. |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
|
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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* |
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*/ |
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#include "src/core/lib/iomgr/port.h" |
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/* This test only relevant on linux systems where epoll() is available */ |
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#if defined(GRPC_LINUX_EPOLL_CREATE1) && defined(GRPC_LINUX_EVENTFD) |
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#include "src/core/lib/iomgr/ev_epollex_linux.h" |
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#include <grpc/grpc.h> |
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#include <string.h> |
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#include <sys/eventfd.h> |
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#include "test/core/util/test_config.h" |
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static void pollset_destroy(void* ps, grpc_error* error) { |
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grpc_pollset_destroy(static_cast<grpc_pollset*>(ps)); |
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gpr_free(ps); |
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} |
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// This test is added to cover the case found in bug:
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// https://github.com/grpc/grpc/issues/15760
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static void test_pollable_owner_fd() { |
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grpc_core::ExecCtx exec_ctx; |
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int ev_fd1; |
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int ev_fd2; |
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grpc_fd* grpc_fd1; |
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grpc_fd* grpc_fd2; |
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grpc_pollset* ps; |
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gpr_mu* mu; |
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// == Create two grpc_fds ==
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// All we need is two file descriptors. Doesn't matter what type. We use
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// eventfd type here for the purpose of this test
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ev_fd1 = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); |
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ev_fd2 = eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); |
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if (ev_fd1 < 0 || ev_fd2 < 0) { |
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gpr_log(GPR_ERROR, "Error in creating event fds for the test"); |
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return; |
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} |
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grpc_fd1 = grpc_fd_create(ev_fd1, "epollex-test-fd1", false); |
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grpc_fd2 = grpc_fd_create(ev_fd2, "epollex-test-fd2", false); |
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grpc_core::ExecCtx::Get()->Flush(); |
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// == Create a pollset ==
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ps = static_cast<grpc_pollset*>(gpr_zalloc(grpc_pollset_size())); |
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grpc_pollset_init(ps, &mu); |
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grpc_core::ExecCtx::Get()->Flush(); |
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// == Add fd1 to pollset ==
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grpc_pollset_add_fd(ps, grpc_fd1); |
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grpc_core::ExecCtx::Get()->Flush(); |
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// == Destroy fd1 ==
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grpc_fd_orphan(grpc_fd1, nullptr, nullptr, "test fd1 orphan"); |
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grpc_core::ExecCtx::Get()->Flush(); |
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// = Add fd2 to pollset ==
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//
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// Before https://github.com/grpc/grpc/issues/15760, the following line caused
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// unexpected behavior (The previous grpc_pollset_add_fd(ps, grpc_fd1) created
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// an underlying structure in epollex that held a reference to grpc_fd1 which
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// was being accessed here even after grpc_fd_orphan(grpc_fd1) was called
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grpc_pollset_add_fd(ps, grpc_fd2); |
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grpc_core::ExecCtx::Get()->Flush(); |
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// == Destroy fd2 ==
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grpc_fd_orphan(grpc_fd2, nullptr, nullptr, "test fd2 orphan"); |
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grpc_core::ExecCtx::Get()->Flush(); |
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|
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// == Destroy pollset
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grpc_closure ps_destroy_closure; |
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GRPC_CLOSURE_INIT(&ps_destroy_closure, pollset_destroy, ps, |
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grpc_schedule_on_exec_ctx); |
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grpc_pollset_shutdown(ps, &ps_destroy_closure); |
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grpc_core::ExecCtx::Get()->Flush(); |
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} |
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|
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int main(int argc, char** argv) { |
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const char* poll_strategy = nullptr; |
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grpc_test_init(argc, argv); |
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grpc_init(); |
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{ |
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grpc_core::ExecCtx exec_ctx; |
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poll_strategy = grpc_get_poll_strategy_name(); |
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if (poll_strategy != nullptr && strcmp(poll_strategy, "epollex") == 0) { |
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test_pollable_owner_fd(); |
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} else { |
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gpr_log(GPR_INFO, |
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"Skipping the test. The test is only relevant for 'epollex' " |
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"strategy. and the current strategy is: '%s'", |
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poll_strategy); |
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|
} |
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|
} |
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|
|
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|
grpc_shutdown(); |
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return 0; |
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} |
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#else /* defined(GRPC_LINUX_EPOLL_CREATE1) && defined(GRPC_LINUX_EVENTFD) */ |
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int main(int argc, char** argv) { return 0; } |
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|
#endif |
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@ -0,0 +1 @@ |
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Subproject commit 6599cac0965be8e5a835ab7a5684bbef033d5ad0 |
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@ -0,0 +1 @@ |
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Subproject commit 9245d481eb3e890f708ff2d7dadf2a10c04748ba |
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@ -0,0 +1,19 @@ |
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|
#!/usr/bin/env bash |
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|
# Copyright 2017 gRPC authors. |
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|
# |
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|
# Licensed under the Apache License, Version 2.0 (the "License"); |
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|
# you may not use this file except in compliance with the License. |
||||||
|
# You may obtain a copy of the License at |
||||||
|
# |
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|
# http://www.apache.org/licenses/LICENSE-2.0 |
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|
# |
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|
# Unless required by applicable law or agreed to in writing, software |
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|
# distributed under the License is distributed on an "AS IS" BASIS, |
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|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
||||||
|
# See the License for the specific language governing permissions and |
||||||
|
# limitations under the License. |
||||||
|
|
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|
export UPLOAD_TEST_RESULTS=true |
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|
EXTRA_FLAGS="--copt=-gmlt --strip=never --copt=-fsanitize=address --linkopt=-fsanitize=address --test_timeout=3600" |
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|
github/grpc/tools/internal_ci/linux/grpc_bazel_on_foundry_base.sh "${EXTRA_FLAGS}" |
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|
|
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@ -0,0 +1,68 @@ |
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|
#!/usr/bin/env bash |
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|
# Copyright 2017 gRPC authors. |
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|
# |
||||||
|
# Licensed under the Apache License, Version 2.0 (the "License"); |
||||||
|
# you may not use this file except in compliance with the License. |
||||||
|
# You may obtain a copy of the License at |
||||||
|
# |
||||||
|
# http://www.apache.org/licenses/LICENSE-2.0 |
||||||
|
# |
||||||
|
# Unless required by applicable law or agreed to in writing, software |
||||||
|
# distributed under the License is distributed on an "AS IS" BASIS, |
||||||
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
||||||
|
# See the License for the specific language governing permissions and |
||||||
|
# limitations under the License. |
||||||
|
|
||||||
|
set -ex |
||||||
|
|
||||||
|
# A temporary solution to give Kokoro credentials. |
||||||
|
# The file name 4321_grpc-testing-service needs to match auth_credential in |
||||||
|
# the build config. |
||||||
|
# TODO: Use keystore. |
||||||
|
mkdir -p ${KOKORO_KEYSTORE_DIR} |
||||||
|
cp ${KOKORO_GFILE_DIR}/GrpcTesting-d0eeee2db331.json ${KOKORO_KEYSTORE_DIR}/4321_grpc-testing-service |
||||||
|
|
||||||
|
temp_dir=$(mktemp -d) |
||||||
|
ln -f "${KOKORO_GFILE_DIR}/bazel-rc-0.14.0rc5" ${temp_dir}/bazel |
||||||
|
chmod 755 "${KOKORO_GFILE_DIR}/bazel-rc-0.14.0rc5" |
||||||
|
export PATH="${temp_dir}:${PATH}" |
||||||
|
# This should show ${temp_dir}/bazel |
||||||
|
which bazel |
||||||
|
chmod +x "${KOKORO_GFILE_DIR}/bazel_wrapper.py" |
||||||
|
|
||||||
|
# change to grpc repo root |
||||||
|
cd $(dirname $0)/../../../.. |
||||||
|
|
||||||
|
source tools/internal_ci/helper_scripts/prepare_build_linux_rc |
||||||
|
|
||||||
|
"${KOKORO_GFILE_DIR}/bazel_wrapper.py" \ |
||||||
|
--host_jvm_args=-Dbazel.DigestFunction=SHA256 \ |
||||||
|
test --jobs="200" \ |
||||||
|
--test_timeout="3600,3600,3600,3600" \ |
||||||
|
--test_output=errors \ |
||||||
|
--verbose_failures=true \ |
||||||
|
--keep_going \ |
||||||
|
--remote_accept_cached=true \ |
||||||
|
--spawn_strategy=remote \ |
||||||
|
--remote_local_fallback=false \ |
||||||
|
--remote_timeout=3600 \ |
||||||
|
--strategy=Javac=remote \ |
||||||
|
--strategy=Closure=remote \ |
||||||
|
--genrule_strategy=remote \ |
||||||
|
--experimental_strict_action_env=true \ |
||||||
|
--experimental_remote_platform_override='properties:{name:"container-image" value:"docker://gcr.io/cloud-marketplace/google/rbe-ubuntu16-04@sha256:59bf0e191a6b5cc1ab62c2224c810681d1326bad5a27b1d36c9f40113e79da7f" }' \ |
||||||
|
--define GRPC_PORT_ISOLATED_RUNTIME=1 \ |
||||||
|
--copt=-gmlt \ |
||||||
|
--strip=never \ |
||||||
|
--copt=-fsanitize=undefined \ |
||||||
|
--linkopt=-fsanitize=undefined \ |
||||||
|
--crosstool_top=@com_github_bazelbuild_bazeltoolchains//configs/experimental/ubuntu16_04_clang/1.0/bazel_0.13.0/ubsan:toolchain \ |
||||||
|
--action_env=BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1 \ |
||||||
|
--extra_toolchains=@com_github_bazelbuild_bazeltoolchains//configs/ubuntu16_04_clang/1.0/bazel_0.13.0/cpp:cc-toolchain-clang-x86_64-default \ |
||||||
|
--extra_execution_platforms=@com_github_bazelbuild_bazeltoolchains//configs/ubuntu16_04_clang/1.0:rbe_ubuntu1604 \ |
||||||
|
-- //test/... || FAILED="true" |
||||||
|
|
||||||
|
if [ "$FAILED" != "" ] |
||||||
|
then |
||||||
|
exit 1 |
||||||
|
fi |
||||||
Loading…
Reference in new issue