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// |jit-test| skip-if: !wasmGcEnabled()
//
// Checks if null dereference works.
for (let [fieldType, signedness, defaultValue] of [
['i8', '_u', 'i32.const 42'],
['i8', '_s', 'i32.const -42'],
['i16', '_u', 'i32.const 1'],
['i16', '_s', 'i32.const -1'],
['i32', '', 'i32.const 3'],
['i64', '', 'i64.const -77777777777'],
['f32', '', 'f32.const 1.4'],
['f64', '', 'f64.const 3.14'],
['externref', '', 'ref.null extern'],
].concat(
wasmSimdEnabled() ? [['v128', '', 'v128.const i32x4 1 2 -3 4']] : []
)) {
// Check struct.get from null struct of a field of fieldType works
// Check struct.set similarly
testStructGetSet(fieldType, signedness, defaultValue, 4);
// - Also when the field is in the outline_ data area?
testStructGetSet(fieldType, signedness, defaultValue, 1000);
// Check array.get similarly
// Check array.set from null array with element of type fieldType
testArrayGetSet(fieldType, signedness, defaultValue, 100);
}
function testStructGetSet(fieldType, signedness, defaultValue, numFields) {
const ins = wasmEvalText(`
(module
(type $t (struct ${
Array(numFields).fill("(field (mut " + fieldType + "))").join(' ')
}))
(global $g (mut (ref null $t)) (ref.null $t))
(func (export "init-null")
ref.null $t
global.set $g
)
(func (export "init-non-null")
${ Array(numFields).fill(defaultValue).join('\n ') }
struct.new $t
global.set $g
)
(func (export "test_get_first")
global.get $g
struct.get${signedness} $t 0
drop
)
(func (export "test_set_first")
global.get $g
${defaultValue}
struct.set $t 0
)
(func (export "test_get_mid")
global.get $g
struct.get${signedness} $t ${numFields >> 1}
drop
)
(func (export "test_set_mid")
global.get $g
${defaultValue}
struct.set $t ${numFields >> 1}
)
(func (export "test_get_last")
global.get $g
struct.get${signedness} $t ${numFields - 1}
drop
)
(func (export "test_set_last")
global.get $g
${defaultValue}
struct.set $t ${numFields - 1}
)
)`);
ins.exports["init-non-null"]();
ins.exports["test_get_first"]();
ins.exports["test_get_mid"]();
ins.exports["test_get_last"]();
ins.exports["test_set_first"]();
ins.exports["test_set_mid"]();
ins.exports["test_set_last"]();
ins.exports["init-null"]();
assertDerefenceNull(() => ins.exports["test_get_first"]());
assertDerefenceNull(() => ins.exports["test_get_mid"]());
assertDerefenceNull(() => ins.exports["test_get_last"]());
assertDerefenceNull(() => ins.exports["test_set_first"]());
assertDerefenceNull(() => ins.exports["test_set_mid"]());
assertDerefenceNull(() => ins.exports["test_set_last"]());
ins.exports["init-non-null"]();
ins.exports["test_set_last"]();
ins.exports["test_get_first"]();
}
function testArrayGetSet(fieldType, signedness, defaultValue, numItems) {
const ins = wasmEvalText(`
(module
(type $t (array (mut ${fieldType})))
(global $g (mut (ref null $t)) (ref.null $t))
(func (export "init-null")
ref.null $t
global.set $g
)
(func (export "init-non-null")
${defaultValue}
i32.const ${numItems}
array.new $t
global.set $g
)
(func (export "test_get") (param i32)
global.get $g
local.get 0
array.get${signedness} $t
drop
)
(func (export "test_set") (param i32)
global.get $g
local.get 0
${defaultValue}
array.set $t
)
)`);
ins.exports["init-non-null"]();
ins.exports["test_get"](0);
ins.exports["test_get"](numItems >> 1);
ins.exports["test_get"](numItems - 1);
ins.exports["test_set"](0);
ins.exports["test_set"](numItems >> 1);
ins.exports["test_set"](numItems - 1);
ins.exports["init-null"]();
assertDerefenceNull(() => ins.exports["test_get"](0));
assertDerefenceNull(() => ins.exports["test_get"](numItems >> 1));
assertDerefenceNull(() => ins.exports["test_get"](numItems - 1));
assertDerefenceNull(() => ins.exports["test_set"](0));
assertDerefenceNull(() => ins.exports["test_set"](numItems >> 1));
assertDerefenceNull(() => ins.exports["test_set"](numItems - 1));
ins.exports["init-non-null"]();
ins.exports["test_set"](3);
ins.exports["test_get"](0);
}
function assertDerefenceNull(fun) {
assertErrorMessage(fun, WebAssembly.RuntimeError, /dereferencing null pointer/);
}
|
