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ID |
Category |
Severity |
Reproducibility |
Date Submitted |
Last Update |
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0000215 |
[Squeak] VM |
crash |
always |
10-04-04 20:02 |
01-09-11 22:52 |
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Reporter |
Nick Briggs |
View Status |
public |
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Assigned To |
lewis |
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Priority |
normal |
Resolution |
open |
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Status |
assigned |
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Product Version |
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Summary |
0000215: JPEGReadWriter2Plugin seg faults on SPARC system because 'double' in structure not 8-byte aligned |
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Description |
Attempting to view a web page from the squeak web browser results in a segmentation fault from the Squeak VM.
Ian Piumarta diagnosed the problem (paraphrased):
The plugin code fails to respect the minimum alignment restrictions on the "cinfo" strcture (8-bytes on SPARC because of 'double' members). The glue code for the plugin allocates the space for the struct in a ByteArray, which only guarantees 4-byte alignment, and would be moveable by GC so padding is not a solution to this problem.
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Additional Information |
If the author of the JPEGReadWriter2Plugin is still around to fix it: the code needs to copy the info structure out of the ByteArray into a local buffer before passing it to the JPEG library routines, and then copy back, if it is modified, on the way out. |
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Attached Files |
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Notes 
