Re: xsrc/58133: X server crashes; radeon 5450; modesetting

[Rhialto <rhialto%falu.nl@localhost>]

The following reply was made to PR xsrc/58133; it has been noted by GNATS.

From: Rhialto <rhialto%falu.nl@localhost>
To: matthew green <mrg%eterna23.net@localhost>
Cc: Rhialto <rhialto%falu.nl@localhost>, xsrc-manager%netbsd.org@localhost,
	gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost,
	gnats-bugs%netbsd.org@localhost
Subject: Re: xsrc/58133: X server crashes; radeon 5450; modesetting
Date: Sat, 11 May 2024 18:38:51 +0200

 I caught a different crash in gdb.
 
 In one xterm I had a lot of text output: ls -lR, repeated.  In another
 workspace (so the xterm window wasn't even mapped, that is how ctwm does
 workspaces): I was just starting geeqie to view some images, and a small
 subrectangle of the first one had already appeared.
 
 radl.1:~$ sudo gdb -p 429
 ...
 Thread 4 "" received signal SIGSEGV, Segmentation fault.
 [Switching to LWP 429 of process 429]
 0x000073c6f0b83b4f in memcpy () from /usr/lib/libc.so.12
 (gdb) bt
 #0  0x000073c6f0b83b4f in memcpy () from /usr/lib/libc.so.12
 #1  0x000073c6e4979b7b in store_shader ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/gallium/drivers/r600/r600_shader.c:152
 #2  0x000073c6e4984742 in store_shader ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/gallium/drivers/r600/r600_shader.c:209
 #3  r600_pipe_shader_create ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/gallium/drivers/r600/r600_shader.c:241
 #4  0x000073c6e495f70c in r600_shader_select ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/gallium/drivers/r600/r600_state_common.c:876
 #5  0x000073c6e49608ae in r600_update_derived_state ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/gallium/drivers/r600/r600_state_common.c:1766
 #6  r600_draw_vbo ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/gallium/drivers/r600/r600_state_common.c:2087
 #7  0x000073c6e458567e in st_draw_vbo ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/mesa/state_tracker/st_draw.c:268
 #8  0x000073c6e4729d32 in _mesa_draw_arrays ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/mesa/main/draw.c:374
 #9  _mesa_draw_arrays ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/mesa/main/draw.c:351
 #10 0x000073c6e4729ddb in _mesa_DrawArrays ()
     at /usr/xsrc/external/mit/MesaLib.old/dist/src/mesa/main/draw.c:531
 #11 0x000073c6e9c1e5ac in glamor_composite_with_shader (ca_state=CA_NONE,
     rects=0x7f7fffa6f3d0, nrect=1, dest_pixmap_priv=0x73c6f01b15d0,
     mask_pixmap_priv=0x0, source_pixmap_priv=0x73c6f01b1710,
     dest_pixmap=<optimized out>, mask_pixmap=0x0,
     source_pixmap=0x73c6f01b16c0, dest=0x73c6f0131380, mask=0x73c6f0131480,
     source=0x73c6f0131400, op=<optimized out>)
     at /usr/xsrc/external/mit/xorg-server/dist/glamor/glamor_render.c:1295
 --Type <RET> for more, q to quit, c to continue without paging--
 #12 glamor_composite_clipped_region (op=<optimized out>, op@entry=3 '\003', source=source@entry=0x73c6f0131400, mask=mask@entry=0x73c6f0131480,
     dest=dest@entry=0x73c6f0131380, source_pixmap=source_pixmap@entry=0x73c6f01b16c0, mask_pixmap=mask_pixmap@entry=0x0, dest_pixmap=dest_pixmap@entry=0x73c6f01b1580,
     region=region@entry=0x7f7fffa6f560, x_source=<optimized out>, x_source@entry=0, y_source=<optimized out>, y_source@entry=0, x_mask=<optimized out>, x_mask@entry=0,
     y_mask=<optimized out>, y_mask@entry=0, x_dest=x_dest@entry=0, y_dest=y_dest@entry=94) at /usr/xsrc/external/mit/xorg-server/dist/glamor/glamor_render.c:1578
 #13 0x000073c6e9c1f96e in glamor_composite (op=<optimized out>, source=0x73c6f0131400, mask=0x73c6f0131480, dest=0x73c6f0131380, x_source=<optimized out>,
     y_source=<optimized out>, x_mask=0, y_mask=0, x_dest=0, y_dest=94, width=6, height=195) at /usr/xsrc/external/mit/xorg-server/dist/glamor/glamor_render.c:1717
 #14 0x00000001d175f0dc in damageComposite (op=<optimized out>, pSrc=<optimized out>, pMask=<optimized out>, pDst=0x73c6f0131380, xSrc=<optimized out>,
     ySrc=<optimized out>, xMask=0, yMask=0, xDst=0, yDst=94, width=6, height=195) at /usr/xsrc/external/mit/xorg-server/dist/miext/damage/damage.c:513
 #15 0x00000001d174501b in ProcRenderComposite ()
 #16 0x00000001d1685c2e in Dispatch ()
 #17 0x00000001d1655e1f in dix_main ()
 #18 0x00000001d16559cd in ___start (cleanup=<optimized out>, ps_strings=0x7f7fffa70fe0) at /usr/src/lib/csu/common/crt0-common.c:350
 #19 0x00007f7f0020baf8 in ?? () from /usr/libexec/ld.elf_so
 #20 0x0000000000000005 in ?? ()
 #21 0x00007f7fffa6fdc8 in ?? ()
 #22 0x00007f7fffa6fdd9 in ?? ()
 #23 0x00007f7fffa6fddc in ?? ()
 #24 0x00007f7fffa6fde1 in ?? ()
 #25 0x00007f7fffa6fde7 in ?? ()
 #26 0x0000000000000000 in ?? ()
 (gdb)
 
 (gdb) list
 147                     if (R600_BIG_ENDIAN) {
 148                             for (i = 0; i < shader->shader.bc.ndw; ++i) {
 149                                     ptr[i] = util_cpu_to_le32(shader->shader.bc.bytecode[i]);
 150                             }
 151                     } else {
 152 -->>>                       memcpy(ptr, shader->shader.bc.bytecode, shader->shader.bc.ndw * sizeof(*ptr));
 153                     }
 154                     rctx->b.ws->buffer_unmap(shader->bo->buf);
 155             }
 156
 (gdb) info frame
 Stack level 1, frame at 0x7f7fffa6edb0:
  rip = 0x73c6e4979b7b in store_shader (/usr/xsrc/external/mit/MesaLib.old/dist/src/gallium/drivers/r600/r600_shader.c:152); saved rip = 0x73c6e4984742
  called by frame at 0x7f7fffa6ee50, caller of frame at 0x7f7fffa6ed60
  source language c.
  Arglist at 0x7f7fffa6eda0, args: 
  Locals at 0x7f7fffa6eda0, Previous frame's sp is 0x7f7fffa6edb0
  Saved registers:
   rbx at 0x7f7fffa6ed90, rbp at 0x7f7fffa6eda0, r12 at 0x7f7fffa6ed98, rip at 0x7f7fffa6eda8
 (gdb) info locals
 No locals.
 
 I'm not sure why gdb doesn't have debugging info here. It loaded a lot
 of debug info files but none with "mesa" in their name. I have the core
 file available for later inspection.