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39 lines
1.3 KiB
Rust
39 lines
1.3 KiB
Rust
//! Helpers used to print a message and abort in case of certain panics and some detected UB.
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use crate::prelude::*;
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fn codegen_print(fx: &mut FunctionCx<'_, '_, '_>, msg: &str) {
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let puts = fx
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.module
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.declare_function(
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"puts",
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Linkage::Import,
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&Signature {
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call_conv: fx.target_config.default_call_conv,
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params: vec![AbiParam::new(fx.pointer_type)],
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returns: vec![AbiParam::new(types::I32)],
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},
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)
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.unwrap();
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let puts = fx.module.declare_func_in_func(puts, &mut fx.bcx.func);
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if fx.clif_comments.enabled() {
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fx.add_comment(puts, "puts");
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}
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let real_msg = format!("trap at {:?} ({}): {}\0", fx.instance, fx.symbol_name, msg);
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let msg_ptr = fx.anonymous_str(&real_msg);
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fx.bcx.ins().call(puts, &[msg_ptr]);
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}
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/// Use this when something is unimplemented, but `libcore` or `libstd` requires it to codegen.
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///
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/// Trap code: user65535
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pub(crate) fn trap_unimplemented(fx: &mut FunctionCx<'_, '_, '_>, msg: impl AsRef<str>) {
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codegen_print(fx, msg.as_ref());
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let one = fx.bcx.ins().iconst(types::I32, 1);
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fx.lib_call("exit", vec![AbiParam::new(types::I32)], vec![], &[one]);
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fx.bcx.ins().trap(TrapCode::user(3).unwrap());
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}
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