| 1 | //===-- smoke tests for RPC -----------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "src/__support/RPC/rpc.h" |
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| 10 | |
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| 11 | #include "test/UnitTest/Test.h" |
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| 12 | |
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| 13 | namespace { |
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| 14 | enum { lane_size = 8, port_count = 4 }; |
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| 15 | |
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| 16 | using ProcAType = LIBC_NAMESPACE::rpc::Process<false>; |
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| 17 | using ProcBType = LIBC_NAMESPACE::rpc::Process<true>; |
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| 18 | |
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| 19 | static_assert(ProcAType::inbox_offset(port_count) == |
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| 20 | ProcBType::outbox_offset(port_count)); |
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| 21 | |
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| 22 | static_assert(ProcAType::outbox_offset(port_count) == |
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| 23 | ProcBType::inbox_offset(port_count)); |
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| 24 | |
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| 25 | enum { alloc_size = ProcAType::allocation_size(port_count, lane_size: 1) }; |
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| 26 | |
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| 27 | alignas(64) char buffer[alloc_size] = {0}; |
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| 28 | } // namespace |
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| 29 | |
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| 30 | TEST(LlvmLibcRPCSmoke, SanityCheck) { |
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| 31 | |
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| 32 | ProcAType ProcA(port_count, buffer); |
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| 33 | ProcBType ProcB(port_count, buffer); |
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| 34 | |
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| 35 | uint64_t index = 0; // any < port_count |
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| 36 | uint64_t lane_mask = 1; |
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| 37 | |
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| 38 | // Each process has its own local lock for index |
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| 39 | EXPECT_TRUE(ProcA.try_lock(lane_mask, index)); |
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| 40 | EXPECT_TRUE(ProcB.try_lock(lane_mask, index)); |
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| 41 | |
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| 42 | // All zero to begin with |
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| 43 | EXPECT_EQ(ProcA.load_inbox(lane_mask, index), 0u); |
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| 44 | EXPECT_EQ(ProcB.load_inbox(lane_mask, index), 0u); |
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| 45 | EXPECT_EQ(ProcA.load_outbox(lane_mask, index), 0u); |
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| 46 | EXPECT_EQ(ProcB.load_outbox(lane_mask, index), 0u); |
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| 47 | |
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| 48 | // Available for ProcA and not for ProcB |
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| 49 | EXPECT_FALSE(ProcA.buffer_unavailable(ProcA.load_inbox(lane_mask, index), |
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| 50 | ProcA.load_outbox(lane_mask, index))); |
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| 51 | EXPECT_TRUE(ProcB.buffer_unavailable(ProcB.load_inbox(lane_mask, index), |
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| 52 | ProcB.load_outbox(lane_mask, index))); |
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| 53 | |
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| 54 | // ProcA write to outbox |
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| 55 | uint32_t ProcAOutbox = ProcA.load_outbox(lane_mask, index); |
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| 56 | EXPECT_EQ(ProcAOutbox, 0u); |
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| 57 | ProcAOutbox = ProcA.invert_outbox(index, current_outbox: ProcAOutbox); |
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| 58 | EXPECT_EQ(ProcAOutbox, 1u); |
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| 59 | |
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| 60 | // No longer available for ProcA |
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| 61 | EXPECT_TRUE(ProcA.buffer_unavailable(ProcA.load_inbox(lane_mask, index), |
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| 62 | ProcAOutbox)); |
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| 63 | |
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| 64 | // Outbox is still zero, hasn't been written to |
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| 65 | EXPECT_EQ(ProcB.load_outbox(lane_mask, index), 0u); |
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| 66 | |
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| 67 | // Wait for ownership will terminate because load_inbox returns 1 |
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| 68 | EXPECT_EQ(ProcB.load_inbox(lane_mask, index), 1u); |
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| 69 | ProcB.wait_for_ownership(lane_mask, index, outbox: 0u, in: 0u); |
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| 70 | |
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| 71 | // and B now has the buffer available |
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| 72 | EXPECT_FALSE(ProcB.buffer_unavailable(ProcB.load_inbox(lane_mask, index), |
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| 73 | ProcB.load_outbox(lane_mask, index))); |
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| 74 | |
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| 75 | // Enough checks for one test, close the locks |
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| 76 | ProcA.unlock(lane_mask, index); |
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| 77 | ProcB.unlock(lane_mask, index); |
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| 78 | } |
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| 79 | |
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