[Cin] patches 09 feb 2022

Phyllis Smith phylsmith2017 at gmail.com
Fri Mar 10 00:01:48 CET 2023

Can now reproduce the "auto fit" crash reliably on Fedora 37 when add to
CFLAGS in cinelerra/Makefile "-flto
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1" and on Fedora 36 under
different circumstances, which is CFLAGS addition of "-O2 -flto".  Not sure
why different CFLAGS are required on different O/S versions.

Anyway I get the same crash backtrace of:
(gdb) bt
#0  0x0000000000a0cad0 in Autos::get_next_auto(long, int, Auto*&, int) ()
#1  0x0000000000b04dde in FloatAutos::get_value(long, int, FloatAuto*&,
FloatAuto*&) ()
#2  0x0000000000b0530e in FloatAutos::get_extents(float*, float*, int*,
long, long) ()
#3  0x0000000000a0ae14 in Automation::get_extents(float*, float*, int*,
long, long, int) ()
#4  0x0000000000c5d092 in Tracks::get_automation_extents(float*, float*,
double, double, int) ()
#5  0x0000000000b6a30d in MWindow::fit_autos(int) ()
#6  0x0000000000a9f8c9 in EditFitAutos::handle_event() ()
#7  0x0000000000cebbf4 in BC_Button::button_release_event() ()
#8  0x0000000000d310fb in BC_WindowBase::dispatch_button_release() ()
#9  0x0000000000d310fb in BC_WindowBase::dispatch_button_release() ()
#10 0x0000000000d399ff in BC_WindowBase::dispatch_event() ()
#11 0x0000000000d3a288 in BC_WindowBase::run_window() ()
#12 0x0000000000b751bf in MWindow::run() ()
#13 0x00000000007f41be in main ()

But the PROBLEM is when I add a printf statement, it no longer crashes.
And when I compile to add a symbol table to use with GDB, it no longer
Applying the patch:
0011-EXPERIMENTAL-try-to-init-two-variables-to-0-in-gloat.patch, still
crashes too.
Any advice of how I can debug further? How can I view the value of
variables in GDB without a symbol table?

On Wed, Feb 15, 2023 at 6:29 PM Phyllis Smith <phylsmith2017 at gmail.com>

>> 09feb2022/0010-TMP-add-flto-to-cinelerra-Makefile.patch
>> localhack, trying to make it crash on "fit all autos" like in Fedora, no
>> luck so far!
> Working again on trying to reproduce this on Fedora 37 with default
> installed gcc.  Patched file with this + added LINKER = ld +flto  to the
> cinelerra/Makefile because read onlinethat flto has to be added to the
> compiler AND the linker.  But still no crash with "fit all autos".
> According to the RPM Fusion bug comment as quoted below, when they removed
> the lto, the crash was fixed.
> I saw the https://www.cinelerra-gg.org/bugtracker/view.php?id=632 mentioned
> lto, so I've tested and disabled lto on the build and now I'm not reproducing
> the issue. But it would be fine if a dedicated issue can be created so that
> cinelerra can work with lto...
> So I still have to find a way to make it crash, so a fix can be created.
> Will update when I succeed.
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