[Flac-dev] 1.0 source candidate

[Josh Coalson]

--- Matt Zimmerman <mdz at debian.org> wrote:
> On Fri, Jul 20, 2001 at 08:14:55PM -0700, Josh Coalson wrote:
> 
> > --- Matt Zimmerman <mdz at debian.org> wrote:
> > > On Fri, Jul 20, 2001 at 10:51:11PM -0400, Matt Zimmerman wrote:
> > > 
> > > > This version seems to work at least partially on ia64.  I am
> > > able
> > > to encode my
> > > > usual test WAV file now, but I still get a segfault during the
> > > self-tests.
> > > 
> > > Interestingly enough, when I recompiled with --enable-debug to
> > > get a
> > > stack
> > > trace, it worked.  Any ideas how to track down the problem?
> > 
> > don't you just hate those?  maybe just manually turning
> > on basic debug info in the release build would get you
> > enough to narrow it down.
> 
> OK, here's the stack trace:
> 
> (gdb) bt
> #0  FLAC__bitbuffer_read_raw_uint32 (bb=0x20000000008c8048, 
>     val=0x80000fffffffa498, bits=24,
> read_callback=0x20000000003b1008, 
>     client_data=0x60000000002beb20) at bitbuffer.c:1107
> #1  0x2000000000123dc0 in stream_decoder_read_metadata_ (
>     decoder=0x60000000002beb20) at stream_decoder.c:633
> #2  0x2000000000123300 in FLAC__stream_decoder_process_metadata (
>     decoder=0x60000000002beb20) at stream_decoder.c:427
> #3  0x4000000000010320 in write_callback (encoder=0x60000000002b8290,
> 
>     buffer=0x60000000002f9df0 "fLaC", bytes=64, samples=0,
> current_frame=0, 
>     client_data=0x80000fffffffa5c0) at encode.c:964
> #4  0x200000000012bc60 in FLAC__stream_encoder_init (
>     encoder=0x60000000002b8290) at stream_encoder.c:467
> #5  0x400000000000d840 in init_encoder (lax=0, do_mid_side=0, 
>     loose_mid_side=0, do_exhaustive_model_search=0,
> do_escape_coding=0, 
>     do_qlp_coeff_prec_search=0, min_residual_partition_order=3, 
>     max_residual_partition_order=3, rice_parameter_search_dist=0, 
>     max_lpc_order=8, blocksize=4608, qlp_coeff_precision=0,
> channels=1, 
>     bps=16, sample_rate=44100, padding=0, 
>     requested_seek_points=0x60000000002ab138 "100x", 
>     num_requested_seek_points=-1, encoder_wrapper=0x80000fffffffa5c0)
>     at encode.c:711
> #6  0x2000000000123dc0 in stream_decoder_read_metadata_ (
>     decoder=0x60000000002b7dd0) at stream_decoder.c:633
> ---Type <return> to continue, or q <return> to quit---
> #7  0x80000fffffffa5e4 in ?? ()
> #8  0x2000000000123dc0 in stream_decoder_read_metadata_
> (decoder=Cannot access memory at address 0x80000fff7fffff00
> 
> Do you consider this important enough to take care of for 1.0, or do
> you want
> to get 1.0 out and worry about porting later?

I looked at the offending line.  It would be pretty hard
for me to debug this one without a IA64 machine.

One thing you could try is #define FLAC__NO_MANUAL_INLINING
in bitbuffer.c.  That would at least use the slower version
of the crashing function.

Josh


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