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Hash trap message symbol nameThis saves ~7% of disk space

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This commit is contained in:
bjorn3 2020-03-13 11:01:39 +01:00
parent 1c02e6c368
commit 4d226e8f17
1 changed files with 7 additions and 1 deletions
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8
src/trap.rs
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@ -1,3 +1,6 @@
use std::collections::hash_map::DefaultHasher;
use std::hash::{Hash, Hasher};
use crate::prelude::*;
fn codegen_print(fx: &mut FunctionCx<'_, '_, impl cranelift_module::Backend>, msg: &str) {
@ -21,12 +24,15 @@ fn codegen_print(fx: &mut FunctionCx<'_, '_, impl cranelift_module::Backend>, ms
let symbol_name = fx.tcx.symbol_name(fx.instance);
let real_msg = format!("trap at {:?} ({}): {}\0", fx.instance, symbol_name, msg);
let mut hasher = DefaultHasher::new();
real_msg.hash(&mut hasher);
let msg_hash = hasher.finish();
let mut data_ctx = DataContext::new();
data_ctx.define(real_msg.as_bytes().to_vec().into_boxed_slice());
let msg_id = fx
.module
.declare_data(
&(symbol_name.name.as_str().to_string() + msg),
&format!("__trap_{:08x}", msg_hash),
Linkage::Local,
false,
false,