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Add some debug features to gen_wasm

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Brian Carroll 2021-12-11 18:58:03 +00:00
parent 96380d5bfe
commit 9594b05c96
4 changed files with 62 additions and 7 deletions
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13
compiler/gen_wasm/src/wasm_module/code_builder.rs
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@ -901,4 +901,17 @@ impl<'a> CodeBuilder<'a> {
instruction_no_args!(i64_reinterpret_f64, I64REINTERPRETF64, 1, true);
instruction_no_args!(f32_reinterpret_i32, F32REINTERPRETI32, 1, true);
instruction_no_args!(f64_reinterpret_i64, F64REINTERPRETI64, 1, true);
/// Generate a debug assertion for an expected i32 value
pub fn _debug_assert_i32(&mut self, expected: i32) {
self.i32_const(expected);
self.i32_eq();
self.i32_eqz();
self.if_(BlockType::NoResult);
self.unreachable_(); // Tell Wasm runtime to throw an exception
self.end();
// It matches. Restore the original value to the VM stack and continue the program.
// We know it matched the expected value, so just use that!
self.i32_const(expected);
}
}