Decompress segfaults on Solaris Sparc #48

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claunia · 2026-01-29T20:29:57Z

claunia commented

2026-01-29 20:29:57 +00:00

Originally created by @jeroen on GitHub (Oct 4, 2015).

Possibly related to https://github.com/google/brotli/issues/203

> brotli_decompress(y)

 *** caught bus error ***
address ffbfc093, cause 'invalid alignment'

Traceback:
 1: .Call(R_brotli_decompress, buf)
 2: brotli_decompress(y)

Originally created by @jeroen on GitHub (Oct 4, 2015). Possibly related to https://github.com/google/brotli/issues/203 ``` > brotli_decompress(y) *** caught bus error *** address ffbfc093, cause 'invalid alignment' Traceback: 1: .Call(R_brotli_decompress, buf) 2: brotli_decompress(y) ```

claunia closed this issue

2026-01-29 20:29:59 +00:00

claunia commented

2026-01-29 20:30:02 +00:00

@eustas commented on GitHub (Oct 4, 2015):

Try to compile with -DBROTLI_BUILD_PORTABLE option.

@eustas commented on GitHub (Oct 4, 2015): Try to compile with -DBROTLI_BUILD_PORTABLE option.

claunia commented

2026-01-29 20:30:04 +00:00

@jeroen commented on GitHub (Oct 4, 2015):

This indeed seems to help. Does this flag have any side effects? Why is it not the default?

@jeroen commented on GitHub (Oct 4, 2015): This indeed seems to help. Does this flag have any side effects? Why is it not the default?

claunia commented

2026-01-29 20:30:05 +00:00

@eustas commented on GitHub (Oct 4, 2015):

We haven't taken Sparc CPUs into account.
I'll prepare patch that disables unaligned reads on Sparc CPUs.

@eustas commented on GitHub (Oct 4, 2015): We haven't taken Sparc CPUs into account. I'll prepare patch that disables unaligned reads on Sparc CPUs.

claunia commented

2026-01-29 20:30:06 +00:00

@eustas commented on GitHub (Oct 6, 2015):

Now SPARC and ARMv6 build in "portable" mode by default.

We're going to replace black-listing with white-listing, so unrecognized architectures would be built in "portable" mode.

Thank you for pointing the problem out.

@eustas commented on GitHub (Oct 6, 2015): Now SPARC and ARMv6 build in "portable" mode by default. We're going to replace black-listing with white-listing, so unrecognized architectures would be built in "portable" mode. Thank you for pointing the problem out.

claunia referenced this issue

2026-01-29 20:46:31 +00:00

[PR #48] [MERGED] Add a faster but less dense compression mode. #634

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Reference: starred/brotli#48