[Fx2lib-devel] [ fx2lib-Issues-2909385 ] segmentation fault

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Issues item #2909385, was opened at 2009-12-05 14:45
Message generated for change (Comment added) made by chiszp
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: segmentation fault

Initial Comment:
Receive segmentation fault from sdcclib due to a bad memory access when making fx2.lib.

Using sdcclib v1.2 and sdcc v2.9.0 on Mac OS X i386 (Snow Leopard v10.6.2).

Do not receive this error when using sdcclib for building other libraries, also for the FX2.

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Comment By: Chris Hiszpanski (chiszp)
Date: 2009-12-05 15:37

Message:
Correction on my last post, should be:

sdcc fx2.lib build/serial.rel build/i2c.rel ...

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Comment By: Chris Hiszpanski (chiszp)
Date: 2009-12-05 15:34

Message:
This is a problem with sdcclib, not fx2lib. In particular, line 61 in
version 1.2 of sdcclib is:

for(; (path[i]!='\\')&&(path[i]!='/')&&(i>=0); i--);

When i = -1, path[-1] will be accessed before the i>=0 check exits the
loop. A work around is to generate a temporary build directory for your
.rel files and call sdcclib as:

sdcclib fx2.lib build/serial.rel i2c.rel ...

The loop will terminate when it reaches the '/', before i == -1.

However, to fix the bug in sdcclib, change the line to:

for(; (i>=0)&&(path[i]!='\\')&&(path[i]!='/'); i--);

This is patch #2788108 in the sdcc project:

http://sourceforge.net/tracker/?func=detail&aid=2788108&group_id=599&atid=300599

We should see it in the next version.

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You can respond by visiting: 
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