luke/iverilog
1
0
Fork 0
mirror of https://github.com/steveicarus/iverilog.git synced 2026-08-31 18:04:38 +02:00
Code Issues Packages Projects Releases Wiki Activity

Fix new GCC warning when building ivlpp.

Browse Source 
Using the old buffer pointer value after a realloc to adjust the pointers
into that buffer is technically undefined behaviour.
This commit is contained in:
Martin Whitaker
2024-02-09 11:52:38 +00:00
parent 2948e9a89f
commit 855dd3a7e6
1 changed files with 7 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files
ivlpp/lexor.lex
+7 -5
View File
@@ -1,7 +1,7 @@
%option prefix="yy"
%{
/*
* Copyright (c) 1999-2023 Stephen Williams ([email protected])
* Copyright (c) 1999-2024 Stephen Williams ([email protected])
*
* This source code is free software; you can redistribute it
* and/or modify it in source code form under the terms of the GNU
@@ -1407,14 +1407,16 @@ static void do_define(void)
added_cnt += 2 - argl;
if (added_cnt > 0) {
char* base = define_text;
size_t head_idx = head - define_text;
size_t tail_idx = tail - define_text;
size_t cp_idx = cp - define_text;
define_cnt += added_cnt;
define_text = realloc(define_text, define_cnt + 1);
head = &define_text[head - base];
tail = &define_text[tail - base];
cp = &define_text[cp - base];
head = &define_text[head_idx];
tail = &define_text[tail_idx];
cp = &define_text[cp_idx];
added_cnt = 0;
}