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Issue #527
segmentation fault in Preproc.so
| Status: | NotEnoughInfo | Start date: | 06/28/2012 | |
|---|---|---|---|---|
| Priority: | High | Due date: | ||
| Assignee: | Wilson Snyder | % Done: | 0% | |
| Category: | - | |||
| Target version: | - |
Description
I am using Perl 5 version 16. This was compiled, installed and ran on a machine running RedHat 5.6 64 bit.
I have Verilog::Perl 3.315 installed.
The line $self->_open($filename); from the subroutine open in the file Preproc.pm causes a segmentation fault. I am attaching a valgrind trace that shows where the segmentation fault occurred. What could be causing this?
I would like to add that everything works fine if I use Perl 5.8.8 and Verilog::Perl 3.221.
valgrind.txt 
(4 KB)
History
#1 Updated by Wilson Snyder 11 months ago
- Status changed from New to AskedReporter
- Assignee set to Wilson Snyder
Sorry for the delay. Is the version of "flex" the same in both cases?
Based on the valgrind report, try this:
diff --git a/Preproc/VPreLex.l b/Preproc/VPreLex.l
--- a/Preproc/VPreLex.l
+++ b/Preproc/VPreLex.l
@ -505,7 +505,8 @ void VPreLex::scanBytesBack(const string& str) {
+ if (!currentBuffer()) return "";
ssize_t left = (yy_n_chars - (yy_c_buf_p - currentBuffer()->yy_ch_buf));
if (left > 0) { // left may be -1 at EOS
*(yy_c_buf_p) = (yy_hold_char);
return string(yy_c_buf_p, left);
string VPreLex::currentUnreadChars() {
// WARNING - Peeking at internals#2 Updated by Wilson Snyder 21 days ago
- Status changed from AskedReporter to NotEnoughInfo
Closing due to age / no response.