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/*
* Copyright (C) 2025 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "TestUtilities.h"
#if ENABLE(WEBASSEMBLY)
#include <wtf/DataLog.h>
#include <wtf/text/MakeString.h>
using namespace JSC;
using namespace JSC::Wasm;
namespace WasmDebugInfoTest {
static bool testI32ConstOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x2a, // [0] i32.const 42
0x1a, // [2] drop
0x0b // [3] end
};
SourceModule module = createWasmModuleWithBytecode(functionBody);
return module.parseAndVerifyDebugInfo(opcode, { { 0, { 2 } } });
}
static bool testI64ConstOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x42, 0x2a, // [0] i64.const 42
0x1a, // [2] drop
0x0b // [3] end
};
SourceModule module = createWasmModuleWithBytecode(functionBody);
return module.parseAndVerifyDebugInfo(opcode, { { 0, { 2 } } });
}
static bool testF32ConstOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x43, 0x00, 0x00, 0x80, 0x3f, // [0] f32.const 1.0
0x1a, // [5] drop
0x0b // [6] end
};
SourceModule module = createWasmModuleWithBytecode(functionBody);
return module.parseAndVerifyDebugInfo(opcode, { { 0, { 5 } } });
}
static bool testF64ConstOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x44, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x3f, // [0] f64.const 1.0
0x1a, // [9] drop
0x0b // [10] end
};
SourceModule module = createWasmModuleWithBytecode(functionBody);
return module.parseAndVerifyDebugInfo(opcode, { { 0, { 9 } } });
}
static bool testGetLocalOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x2a, // [0] i32.const 42
0x21, 0x00, // [2] local.set 0
0x20, 0x00, // [4] local.get 0
0x1a, // [6] drop
0x0b // [7] end
};
SourceModule module = createWasmModuleWithLocals(functionBody);
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } },
{ 4, { 6 } }
});
}
static bool testSetLocalOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x2a, // [0] i32.const 42
0x21, 0x00, // [2] local.set 0
0x0b // [4] end
};
SourceModule module = createWasmModuleWithLocals(functionBody);
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } }
});
}
static bool testTeeLocalOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x2a, // [0] i32.const 42
0x22, 0x00, // [2] local.tee 0
0x1a, // [4] drop
0x0b // [5] end
};
SourceModule module = createWasmModuleWithLocals(functionBody);
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } }
});
}
static bool testGetGlobalOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x23, 0x00, // [0] global.get 0
0x1a, // [2] drop
0x0b // [3] end
};
SourceModule module = createWasmModuleWithGlobals(functionBody);
return module.parseAndVerifyDebugInfo(opcode, { { 0, { 2 } } });
}
static bool testSetGlobalOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x2a, // [0] i32.const 42
0x24, 0x00, // [2] global.set 0
0x0b // [4] end
};
SourceModule module = createWasmModuleWithGlobals(functionBody);
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } }
});
}
static bool testTableGetOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x00, // [0] i32.const 0
0x25, 0x00, // [2] table.get 0
0x1a, // [4] drop
0x0b // [5] end
};
SourceModule module = createWasmModuleWithTable(functionBody);
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } }
});
}
static bool testTableSetOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x00, // [0] i32.const 0 (index)
0xd0, 0x70, // [2] ref.null func
0x26, 0x00, // [4] table.set 0
0x0b // [6] end
};
SourceModule module = createWasmModuleWithTable(functionBody);
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } },
{ 4, { 6 } }
});
}
static bool testCurrentMemoryOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x3f, 0x00, // [0] memory.size
0x1a, // [2] drop
0x0b // [3] end
};
SourceModule module = createWasmModuleWithMemory(functionBody);
return module.parseAndVerifyDebugInfo(opcode, { { 0, { 2 } } });
}
static bool testGrowMemoryOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x01, // [0] i32.const 1
0x40, 0x00, // [2] memory.grow
0x1a, // [4] drop
0x0b // [5] end
};
SourceModule module = createWasmModuleWithMemory(functionBody);
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } }
});
}
static bool testRefNullOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0xd0, 0x70, // [0] ref.null func
0x1a, // [2] drop
0x0b // [3] end
};
SourceModule module = createWasmModuleWithBytecode(functionBody);
return module.parseAndVerifyDebugInfo(opcode, { { 0, { 2 } } });
}
static bool testRefIsNullOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0xd0, 0x70, // [0] ref.null func
0xd1, // [2] ref.is_null
0x1a, // [3] drop
0x0b // [4] end
};
SourceModule module = createWasmModuleWithBytecode(functionBody);
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 3 } },
});
}
static bool testRefFuncOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0xd2, 0x00, // [0] ref.func 0
0x0b // [2] end
};
SourceModule module = SourceModule::create()
.withFunctionType({ }, { toLEB128(TypeKind::Funcref) })
.withFunctionBody(functionBody)
.build();
return module.parseAndVerifyDebugInfo(opcode, { { 0, { 2 } } });
}
static bool testRefEqOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0xd0, 0x6d, // [0] ref.null eq
0xd0, 0x6d, // [2] ref.null eq
0xd3, // [4] ref.eq
0x0b // [5] end
};
SourceModule module = SourceModule::create()
.withFunctionType({ }, { toLEB128(TypeKind::I32) })
.withFunctionBody(functionBody)
.build();
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } },
{ 4, { 5 } },
});
}
static bool testRefAsNonNullOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x20, 0x00, // [0] local.get 0
0xd4, // [2] ref.as_non_null
0x0b // [3] end
};
SourceModule module = SourceModule::create()
.withFunctionType({ toLEB128(TypeKind::Funcref) }, { toLEB128(TypeKind::Funcref) })
.withFunctionBody(functionBody)
.build();
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 3 } },
});
}
// Note: Call instructions have two debugging behaviors:
// 1. Step-over: Maps call instruction -> next instruction (tested here via offsetToNextInstructions)
// 2. Step-into: Handled at runtime in ExecutionHandler::step() when target is IPInt mode
// This test verifies the step-over case where we map the call to the next instruction.
static bool testCallOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x2a, // [0] i32.const 42
0x10, 0x00, // [2] call 0 (recursive call)
0x1a, // [4] drop
0x0b // [5] end
};
SourceModule module = createWasmModuleWithBytecode(functionBody);
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } },
});
}
static bool testCallIndirectOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x2a, // [0] i32.const 42 (function argument)
0x41, 0x00, // [2] i32.const 0 (table index)
0x11, 0x00, 0x00, // [4] call_indirect type=0 table=0
0x0b // [7] end (function returns the i32 result)
};
SourceModule module = SourceModule::create()
.withFunctionType({ toLEB128(TypeKind::I32) }, { toLEB128(TypeKind::I32) })
.withTable()
.withFunctionBody(functionBody)
.build();
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } },
{ 4, { 7 } },
});
}
static bool testCallRefOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0xd2, 0x00, // [0] ref.func 0
0x14, 0x00, // [2] call_ref type=0
0x0b // [4] end
};
SourceModule module = SourceModule::create()
.withFunctionType({ }, { toLEB128(TypeKind::I32) })
.withFunctionBody(functionBody)
.build();
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } },
});
}
static bool testTailCallOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x2a, // [0] i32.const 42
0x12, 0x00, // [2] tail_call 0 (recursive tail call)
0x0b // [4] end
};
SourceModule module = createWasmModuleWithBytecode(functionBody);
// Tail calls return to caller's caller, not to the next instruction
// Step-over is handled at runtime by setting breakpoint at caller
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } }
});
}
static bool testTailCallIndirectOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0x41, 0x2a, // [0] i32.const 42 (function argument)
0x41, 0x00, // [2] i32.const 0 (table index)
0x13, 0x00, 0x00, // [4] tail_call_indirect type=0 table=0
0x0b // [7] end
};
SourceModule module = SourceModule::create()
.withFunctionType({ toLEB128(TypeKind::I32) }, { toLEB128(TypeKind::I32) })
.withTable()
.withFunctionBody(functionBody)
.build();
// Tail calls return to caller's caller, not to the next instruction
// Step-over is handled at runtime by setting breakpoint at caller
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } },
{ 2, { 4 } }
});
}
static bool testTailCallRefOpcode(OpType opcode)
{
Vector<uint8_t> functionBody = {
0xd2, 0x00, // [0] ref.func 0
0x15, 0x00, // [2] tail_call_ref type=0
0x0b // [4] end
};
SourceModule module = SourceModule::create()
.withFunctionType({ }, { toLEB128(TypeKind::I32) })
.withFunctionBody(functionBody)
.build();
// Tail calls return to caller's caller, not to the next instruction
// Step-over is handled at runtime by setting breakpoint at caller
return module.parseAndVerifyDebugInfo(opcode, {
{ 0, { 2 } }
});
}
void testAllSpecialOps()
{
dataLogLn("=== Testing All Special Ops Coverage ===");
dataLogLn("Total special opcodes in WasmOps.h: ", TOTAL_SPECIAL_OPS);
int opsTested = 0;
int opsSucceeded = 0;
#define TEST_SPECIAL_OP(name, id, b3, inc) \
do { \
opsTested++; \
testsRun++; \
if (test##name##Opcode(OpType::name)) { \
opsSucceeded++; \
testsPassed++; \
} else { \
testsFailed++; \
dataLogLn("FAILED: ", #name, " special opcode test"); \
} \
} while (0);
FOR_EACH_WASM_SPECIAL_OP(TEST_SPECIAL_OP)
#undef TEST_SPECIAL_OP
TEST_ASSERT(opsTested == TOTAL_SPECIAL_OPS,
makeString("Tested all "_s, String::number(TOTAL_SPECIAL_OPS), " special ops"_s).utf8().data());
TEST_ASSERT(opsSucceeded == TOTAL_SPECIAL_OPS,
makeString("All "_s, String::number(TOTAL_SPECIAL_OPS), " special ops completed"_s).utf8().data());
dataLogLn(" Successfully tested: ", opsSucceeded, " / ", opsTested, " special ops");
dataLogLn("All special ops coverage testing completed");
}
} // namespace WasmDebugInfoTest
#endif // ENABLE(WEBASSEMBLY)
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