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Unified Diff: test/unittests/wasm/control-transfer-unittest.cc

Issue 1972153002: [wasm] Implement an interpreter for WASM. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Rebase Created 4 years, 7 months ago
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Index: test/unittests/wasm/control-transfer-unittest.cc
diff --git a/test/unittests/wasm/control-transfer-unittest.cc b/test/unittests/wasm/control-transfer-unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2b67f12ef5152c295c5515be1baf2e1a5cd25b09
--- /dev/null
+++ b/test/unittests/wasm/control-transfer-unittest.cc
@@ -0,0 +1,402 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "test/unittests/test-utils.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+#include "src/v8.h"
+
+#include "src/wasm/wasm-interpreter.h"
+#include "src/wasm/wasm-macro-gen.h"
+
+using testing::MakeMatcher;
+using testing::Matcher;
+using testing::MatcherInterface;
+using testing::MatchResultListener;
+using testing::StringMatchResultListener;
+
+namespace v8 {
+namespace internal {
+namespace wasm {
+
+#define B1(a) kExprBlock, a, kExprEnd
+#define B2(a, b) kExprBlock, a, b, kExprEnd
+#define B3(a, b, c) kExprBlock, a, b, c, kExprEnd
+
+struct ExpectedTarget {
+ pc_t pc;
+ ControlTransfer expected;
+};
+
+// For nicer error messages.
+class ControlTransferMatcher : public MatcherInterface<const ControlTransfer&> {
+ public:
+ explicit ControlTransferMatcher(pc_t pc, const ControlTransfer& expected)
+ : pc_(pc), expected_(expected) {}
+
+ void DescribeTo(std::ostream* os) const override {
+ *os << "@" << pc_ << " {pcdiff = " << expected_.pcdiff
+ << ", spdiff = " << expected_.spdiff
+ << ", action = " << expected_.action << "}";
+ }
+
+ bool MatchAndExplain(const ControlTransfer& input,
+ MatchResultListener* listener) const override {
+ if (input.pcdiff != expected_.pcdiff || input.spdiff != expected_.spdiff ||
+ input.action != expected_.action) {
+ *listener << "@" << pc_ << " {pcdiff = " << input.pcdiff
+ << ", spdiff = " << input.spdiff
+ << ", action = " << input.action << "}";
+ return false;
+ }
+ return true;
+ }
+
+ private:
+ pc_t pc_;
+ const ControlTransfer& expected_;
+};
+
+class ControlTransferTest : public TestWithZone {
+ public:
+ void CheckControlTransfers(const byte* start, const byte* end,
+ ExpectedTarget* expected_targets,
+ size_t num_targets) {
+ ControlTransferMap map =
+ WasmInterpreter::ComputeControlTransfersForTesting(zone(), start, end);
+ // Check all control targets in the map.
+ for (size_t i = 0; i < num_targets; i++) {
+ pc_t pc = expected_targets[i].pc;
+ auto it = map.find(pc);
+ if (it == map.end()) {
+ printf("expected control target @ +%zu\n", pc);
+ EXPECT_TRUE(false);
+ } else {
+ ControlTransfer& expected = expected_targets[i].expected;
+ ControlTransfer& target = it->second;
+ EXPECT_THAT(target,
+ MakeMatcher(new ControlTransferMatcher(pc, expected)));
+ }
+ }
+
+ // Check there are no other control targets.
+ for (pc_t pc = 0; start + pc < end; pc++) {
+ bool found = false;
+ for (size_t i = 0; i < num_targets; i++) {
+ if (expected_targets[i].pc == pc) {
+ found = true;
+ break;
+ }
+ }
+ if (found) continue;
+ if (map.find(pc) != map.end()) {
+ printf("expected no control @ +%zu\n", pc);
+ EXPECT_TRUE(false);
+ }
+ }
+ }
+};
+
+// Macro for simplifying tests below.
+#define EXPECT_TARGETS(...) \
+ do { \
+ ExpectedTarget pairs[] = {__VA_ARGS__}; \
+ CheckControlTransfers(code, code + sizeof(code), pairs, arraysize(pairs)); \
+ } while (false)
+
+TEST_F(ControlTransferTest, SimpleIf) {
+ byte code[] = {
+ kExprI32Const, // @0
+ 0, // +1
+ kExprIf, // @2
+ kExprEnd // @3
+ };
+ EXPECT_TARGETS({2, {2, 0, ControlTransfer::kPushVoid}}, // --
+ {3, {1, 0, ControlTransfer::kPushVoid}});
+}
+
+TEST_F(ControlTransferTest, SimpleIf1) {
+ byte code[] = {
+ kExprI32Const, // @0
+ 0, // +1
+ kExprIf, // @2
+ kExprNop, // @3
+ kExprEnd // @4
+ };
+ EXPECT_TARGETS({2, {3, 0, ControlTransfer::kPushVoid}}, // --
+ {4, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, SimpleIf2) {
+ byte code[] = {
+ kExprI32Const, // @0
+ 0, // +1
+ kExprIf, // @2
+ kExprNop, // @3
+ kExprNop, // @4
+ kExprEnd // @5
+ };
+ EXPECT_TARGETS({2, {4, 0, ControlTransfer::kPushVoid}}, // --
+ {5, {1, 2, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, SimpleIfElse) {
+ byte code[] = {
+ kExprI32Const, // @0
+ 0, // +1
+ kExprIf, // @2
+ kExprElse, // @3
+ kExprEnd // @4
+ };
+ EXPECT_TARGETS({2, {2, 0, ControlTransfer::kNoAction}}, // --
+ {3, {2, 0, ControlTransfer::kPushVoid}}, // --
+ {4, {1, 0, ControlTransfer::kPushVoid}});
+}
+
+TEST_F(ControlTransferTest, SimpleIfElse1) {
+ byte code[] = {
+ kExprI32Const, // @0
+ 0, // +1
+ kExprIf, // @2
+ kExprNop, // @3
+ kExprElse, // @4
+ kExprNop, // @5
+ kExprEnd // @6
+ };
+ EXPECT_TARGETS({2, {3, 0, ControlTransfer::kNoAction}}, // --
+ {4, {3, 1, ControlTransfer::kPopAndRepush}}, // --
+ {6, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, IfBr) {
+ byte code[] = {
+ kExprI32Const, // @0
+ 0, // +1
+ kExprIf, // @2
+ kExprBr, // @3
+ ARITY_0, // +1
+ 0, // +1
+ kExprEnd // @6
+ };
+ EXPECT_TARGETS({2, {5, 0, ControlTransfer::kPushVoid}}, // --
+ {3, {4, 0, ControlTransfer::kPushVoid}}, // --
+ {6, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, IfBrElse) {
+ byte code[] = {
+ kExprI32Const, // @0
+ 0, // +1
+ kExprIf, // @2
+ kExprBr, // @3
+ ARITY_0, // +1
+ 0, // +1
+ kExprElse, // @6
+ kExprEnd // @7
+ };
+ EXPECT_TARGETS({2, {5, 0, ControlTransfer::kNoAction}}, // --
+ {3, {5, 0, ControlTransfer::kPushVoid}}, // --
+ {6, {2, 1, ControlTransfer::kPopAndRepush}}, // --
+ {7, {1, 0, ControlTransfer::kPushVoid}});
+}
+
+TEST_F(ControlTransferTest, IfElseBr) {
+ byte code[] = {
+ kExprI32Const, // @0
+ 0, // +1
+ kExprIf, // @2
+ kExprNop, // @3
+ kExprElse, // @4
+ kExprBr, // @5
+ ARITY_0, // +1
+ 0, // +1
+ kExprEnd // @8
+ };
+ EXPECT_TARGETS({2, {3, 0, ControlTransfer::kNoAction}}, // --
+ {4, {5, 1, ControlTransfer::kPopAndRepush}}, // --
+ {5, {4, 0, ControlTransfer::kPushVoid}}, // --
+ {8, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, BlockEmpty) {
+ byte code[] = {
+ kExprBlock, // @0
+ kExprEnd // @1
+ };
+ EXPECT_TARGETS({1, {1, 0, ControlTransfer::kPushVoid}});
+}
+
+TEST_F(ControlTransferTest, Br0) {
+ byte code[] = {
+ kExprBlock, // @0
+ kExprBr, // @1
+ ARITY_0, // +1
+ 0, // +1
+ kExprEnd // @4
+ };
+ EXPECT_TARGETS({1, {4, 0, ControlTransfer::kPushVoid}},
+ {4, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, Br1) {
+ byte code[] = {
+ kExprBlock, // @0
+ kExprNop, // @1
+ kExprBr, // @2
+ ARITY_0, // +1
+ 0, // +1
+ kExprEnd // @5
+ };
+ EXPECT_TARGETS({2, {4, 1, ControlTransfer::kPopAndRepush}}, // --
+ {5, {1, 2, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, Br2) {
+ byte code[] = {
+ kExprBlock, // @0
+ kExprNop, // @1
+ kExprNop, // @2
+ kExprBr, // @3
+ ARITY_0, // +1
+ 0, // +1
+ kExprEnd // @6
+ };
+ EXPECT_TARGETS({3, {4, 2, ControlTransfer::kPopAndRepush}}, // --
+ {6, {1, 3, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, Br0b) {
+ byte code[] = {
+ kExprBlock, // @0
+ kExprBr, // @1
+ ARITY_0, // +1
+ 0, // +1
+ kExprNop, // @4
+ kExprEnd // @5
+ };
+ EXPECT_TARGETS({1, {5, 0, ControlTransfer::kPushVoid}}, // --
+ {5, {1, 2, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, Br0c) {
+ byte code[] = {
+ kExprBlock, // @0
+ kExprBr, // @1
+ ARITY_0, // +1
+ 0, // +1
+ kExprNop, // @4
+ kExprNop, // @5
+ kExprEnd // @6
+ };
+ EXPECT_TARGETS({1, {6, 0, ControlTransfer::kPushVoid}}, // --
+ {6, {1, 3, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, SimpleLoop1) {
+ byte code[] = {
+ kExprLoop, // @0
+ kExprBr, // @1
+ ARITY_0, // +1
+ 0, // +1
+ kExprEnd // @4
+ };
+ EXPECT_TARGETS({1, {-1, 0, ControlTransfer::kNoAction}}, // --
+ {4, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, SimpleLoop2) {
+ byte code[] = {
+ kExprLoop, // @0
+ kExprNop, // @1
+ kExprBr, // @2
+ ARITY_0, // +1
+ 0, // +1
+ kExprEnd // @5
+ };
+ EXPECT_TARGETS({2, {-2, 1, ControlTransfer::kNoAction}}, // --
+ {5, {1, 2, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, SimpleLoopExit1) {
+ byte code[] = {
+ kExprLoop, // @0
+ kExprBr, // @1
+ ARITY_0, // +1
+ 1, // +1
+ kExprEnd // @4
+ };
+ EXPECT_TARGETS({1, {4, 0, ControlTransfer::kPushVoid}}, // --
+ {4, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, SimpleLoopExit2) {
+ byte code[] = {
+ kExprLoop, // @0
+ kExprNop, // @1
+ kExprBr, // @2
+ ARITY_0, // +1
+ 1, // +1
+ kExprEnd // @5
+ };
+ EXPECT_TARGETS({2, {4, 1, ControlTransfer::kPopAndRepush}}, // --
+ {5, {1, 2, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, BrTable0) {
+ byte code[] = {
+ kExprBlock, // @0
+ kExprI8Const, // @1
+ 0, // +1
+ kExprBrTable, // @3
+ ARITY_0, // +1
+ 0, // +1
+ U32_LE(0), // +4
+ kExprEnd // @10
+ };
+ EXPECT_TARGETS({3, {8, 0, ControlTransfer::kPushVoid}}, // --
+ {10, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, BrTable1) {
+ byte code[] = {
+ kExprBlock, // @0
+ kExprI8Const, // @1
+ 0, // +1
+ kExprBrTable, // @3
+ ARITY_0, // +1
+ 1, // +1
+ U32_LE(0), // +4
+ U32_LE(0), // +4
+ kExprEnd // @14
+ };
+ EXPECT_TARGETS({3, {12, 0, ControlTransfer::kPushVoid}}, // --
+ {4, {11, 0, ControlTransfer::kPushVoid}}, // --
+ {14, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+TEST_F(ControlTransferTest, BrTable2) {
+ byte code[] = {
+ kExprBlock, // @0
+ kExprBlock, // @1
+ kExprI8Const, // @2
+ 0, // +1
+ kExprBrTable, // @4
+ ARITY_0, // +1
+ 2, // +1
+ U32_LE(0), // +4
+ U32_LE(0), // +4
+ U32_LE(1), // +4
+ kExprEnd, // @19
+ kExprEnd // @19
+ };
+ EXPECT_TARGETS({4, {16, 0, ControlTransfer::kPushVoid}}, // --
+ {5, {15, 0, ControlTransfer::kPushVoid}}, // --
+ {6, {15, 0, ControlTransfer::kPushVoid}}, // --
+ {19, {1, 1, ControlTransfer::kPopAndRepush}}, // --
+ {20, {1, 1, ControlTransfer::kPopAndRepush}});
+}
+
+} // namespace wasm
+} // namespace internal
+} // namespace v8
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