Method hook_malloc_exit

crates/cranelift/src/func_environ.rs:779–799

(&mut self, builder: &mut FunctionBuilder, retvals: &[ir::Value])

    }

    fn hook_malloc_exit(&mut self, builder: &mut FunctionBuilder, retvals: &[ir::Value]) {
        let check_malloc = self.builtin_functions.check_malloc(builder.func);
        let vmctx = self.vmctx_val(&mut builder.cursor());
        let func_args = builder
            .func
            .dfg
            .block_params(builder.func.layout.entry_block().unwrap());
        let len = if func_args.len() < 3 {
            return;
        } else {
            // If a function named `malloc` has at least one argument, we assume the
            // first argument is the requested allocation size.
            func_args[2]
        };
        let retval = if retvals.len() < 1 {
            return;
        } else {
            retvals[0]
        };
        builder.ins().call(check_malloc, &[vmctx, retval, len]);
    }

    fn hook_free_exit(&mut self, builder: &mut FunctionBuilder) {
        let check_free = self.builtin_functions.check_free(builder.func);