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Remove the trick of pushing an extra N+1 entry to function_offsets. It's bug-prone.

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Brian Carroll 2022-11-17 07:43:26 +00:00
parent 0c81063c68
commit 24e6e8445d
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2 changed files with 24 additions and 20 deletions
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14
crates/wasm_module/src/lib.rs
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@ -267,7 +267,7 @@ impl<'a> WasmModule<'a> {
self.names.function_names[old_index].1 = new_name;
}
// Relocate calls from to JS imports
// Relocate calls to JS imports
// This must happen *before* we run dead code elimination on the code section,
// so that byte offsets in the linking data will still be valid.
for (new_index, &old_index) in live_import_fns.iter().enumerate() {
@ -291,7 +291,11 @@ impl<'a> WasmModule<'a> {
for (i, fn_index) in (fn_index_min..fn_index_max).enumerate() {
if live_flags[fn_index as usize] {
let code_start = self.code.function_offsets[i] as usize;
let code_end = self.code.function_offsets[i + 1] as usize;
let code_end = if i < self.code.function_offsets.len() - 1 {
self.code.function_offsets[i + 1] as usize
} else {
self.code.bytes.len()
};
buffer.extend_from_slice(&self.code.bytes[code_start..code_end]);
} else {
DUMMY_FUNCTION.serialize(&mut buffer);
@ -367,7 +371,11 @@ impl<'a> WasmModule<'a> {
// Find where the function body is
let offset_index = fn_index - fn_index_min as usize;
let code_start = self.code.function_offsets[offset_index];
let code_end = self.code.function_offsets[offset_index + 1];
let code_end = if offset_index < self.code.function_offsets.len() - 1 {
self.code.function_offsets[offset_index + 1]
} else {
self.code.bytes.len() as u32
};
// For each call in the body
for (offset, symbol) in call_offsets_and_symbols.iter() {