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view lwasm/pass7.c @ 583:000381ee2d5c default tip
Guard against single operand multiplication when detecting like terms
This *shouldn't* happen, but it apparently does in some pathological cases
so guard against a single operand multiplication to prevent a crash.
author | William Astle <lost@l-w.ca> |
---|---|
date | Mon, 04 Nov 2024 23:48:23 -0700 |
parents | 71f507f404f1 |
children |
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/* pass7.c Copyright © 2010 William Astle This file is part of LWTOOLS. LWTOOLS is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <stdio.h> #include <string.h> #include <lw_alloc.h> #include <lw_string.h> #include "lwasm.h" #include "instab.h" /* emit pass Generate object code */ void do_pass7(asmstate_t *as) { line_t *cl; for (cl = as -> line_head; cl; cl = cl -> next) { as -> cl = cl; if (cl -> insn != -1) { if (instab[cl -> insn].emit) { (instab[cl -> insn].emit)(as, cl); } if (CURPRAGMA(cl, PRAGMA_TESTMODE)) { char* buf; int len; lwasm_testflags_t flags; lwasm_errorcode_t err; lwasm_parse_testmode_comment(cl, &flags, &err, &len, &buf); if (flags == TF_ERROR && cl -> err_testmode == 0) { char s[128]; sprintf(s, "expected %d but assembled OK", err); lwasm_error_testmode(cl, s, 0); } if (flags == TF_EMIT) { if (cl -> len != len) lwasm_error_testmode(cl, "incorrect assembly (wrong length)", 0); if (memcmp(buf, cl -> output, len) != 0) lwasm_error_testmode(cl, "incorrect assembly", 0); lw_free(buf); } } } } }