[raster] Regress test failures on 32 bit

[strk]

Many tests fail on my 32bit system, they pretty much all look like precision issues. Maybe you could pass final output to round() ?

I'm attaching the full regress run dir

[strk]

regress results on 32bit as of r7171

[pracine]

I get the same. This is because test #4 make the server to crash in rt_band.sql:

123.4567
1234.567
1234.567
server closed the connection unexpectedly
	This probably means the server terminated abnormally
	before or while processing the request.
connection to server was lost

[pracine]

The following query make the server to crash:

SELECT	ST_AddBand(
		ST_AddBand(
			ST_AddBand(
				ST_MakeEmptyRaster(200, 200, 10, 10, 2, 2, 0, 0,-1)
				, 1, '64BF', 1234.5678, NULL
			)
			, '64BF', 987.654321, NULL
		)
		, '64BF', 9876.54321, NULL
	)

If I remove one ST_AddBand imbrication, no problem.

[pracine]

If I update everything to revision 7147, which was the first commited by Bborie, I get rt_band.sql to fail but the server does not crash:

*** rt_band_expected	Tue May 17 16:49:22 2011
--- /tmp/rtpgis_reg_6160/test_9_out	Tue May 17 16:51:50 2011
***************
*** 1,17 ****
  123.4567
  1234.567
  1234.567
! 1234.5678
! 987.654321
  9876.54321
! 1234.5678
! 987.654321
  9876.54321
! 1234.5678
! 1234.5678
  9876.54321
! 987.654321
! 1234.5678
  4
  3
  2
--- 1,17 ----
  123.4567
  1234.567
  1234.567
! 4.47593815953616e-91
! 4.47593815953616e-91
  9876.54321
! 4.47593815953616e-91
! 4.47593815953616e-91
  9876.54321
! 4.47593815953616e-91
! 4.47593815953616e-91
  9876.54321
! 4.47593815953616e-91
! 4.47593815953616e-91
  4
  3
  2

[pracine]

Apparently this query also crashes with the preceding revision (r7107). It's just that this 3 level ST_AddBand query was introduced by BBorie in r7147. Continue tracking…

[pracine]

I can confirm that this bug was introduced in r7106. The preceding query works fine with r7105 and not with r7106…

[strk]

I confirm the crash.

[Bborie Park]

Do either of you experience this crash in 64-bit? Or only in 32-bit?

[pracine]

I am on Windows 7 64-bit.

[Bborie Park]

32-bit or 64-bit PostgreSQL?

[pracine]

32 bit.

[Bborie Park]

I also confirm this in 32-bit PostgreSQL with r7201 in Slackware Linux 13.37. Time to dust off gdb and find out what is going on.

[Bborie Park]

A backtrace of the crash caused by the query.

#0  0xb74f10e4 in memcpy () from /lib/libc.so.6
#1  0xb4f440e3 in rt_raster_serialize (raster=0x8559760) at rt_api.c:4632
#2  0xb4f37617 in RASTER_addband () from /usr/local/pgsql/lib/rtpostgis-2.0.so
#3  0x0818c800 in ExecMakeFunctionResult ()
#4  0x0818ed73 in ExecProject ()
#5  0x0819d5b1 in ExecResult ()
#6  0x08187d39 in ExecProcNode ()
#7  0x081852d2 in standard_ExecutorRun ()
#8  0x081923f5 in fmgr_sql ()
#9  0x0818c800 in ExecMakeFunctionResult ()
#10 0x0818d779 in ExecEvalExprSwitchContext ()
#11 0x081f4647 in evaluate_expr ()
#12 0x081f6551 in simplify_function ()
#13 0x081f6b32 in eval_const_expressions_mutator ()
#14 0x081f6af6 in eval_const_expressions_mutator ()
#15 0x081f6af6 in eval_const_expressions_mutator ()
#16 0x081b699d in expression_tree_mutator ()
#17 0x081f69bb in eval_const_expressions_mutator ()
#18 0x081b6c9c in expression_tree_mutator ()
#19 0x081f69bb in eval_const_expressions_mutator ()
#20 0x081f848b in eval_const_expressions ()
#21 0x081e80c8 in preprocess_expression ()
#22 0x081eaef3 in subquery_planner ()
#23 0x081eb700 in standard_planner ()
#24 0x0823cb80 in pg_plan_query ()
#25 0x0823cc5d in pg_plan_queries ()
#26 0x0823d656 in PostgresMain ()
#27 0x0820c442 in BackendStartup ()
#28 0x0820ca19 in ServerLoop ()
#29 0x0820d3ec in PostmasterMain ()
#30 0x081b5056 in main ()

[strk]

a valgrind report would be more useful as it would tell you the point in which what looks like a short allocation were made.

[jorgearevalo]

Attached a valgrind report. I'm not sure about the meaning of the libcrypto related errors. There're no more errors. Did I forget any parameter in valgrind call? My line was:

valgrind --leak-check=full --track-origins=yes -v --trace-children=yes --log-file=st_band_valgrind.log perl /usr/bin/psql -d testing2 -c "select st_value(st_band(st_addband(st_addband(st_addband(st_makeemptyraster(200, 200, 10, 10, 2, 2, 0, 0, -1), 1, '64BF', 1234.5678, NULL), '64BF', 987.654321, NULL), '64BF', 9876.54321, NULL), ARRAY[1]), 3, 3)"

[jorgearevalo]

Valgrind report

[strk]

That call checks a run of perl ??

Even if you drop the perl part, you're testin the client, not the server. Checking the server requires running the backend in single-user mode and passing it the offending query.

[jorgearevalo]

Oh, what I've done… Of course. Absolutely stupid on my side. This is what happens when you do things quickly and without thinking. Attached the right log file. And I executed:

echo "select st_value(st_band(st_addband(st_addband(st_addband(st_makeemptyraster(200, 200, 10, 10, 2, 2, 0, 0, -1), 1, '64BF', 1234.5678, NULL), '64BF', 987.654321, NULL), '64BF', 9876.54321, NULL), ARRAY[1]), 3, 3)" | valgrind --leak-check=full --log-file=valgrind_stband.log --track-origins=yes -v --trace-children=yes /usr/lib/postgresql/8.4/bin/postgres --single -D /var/lib/postgresql/8.4/main/ -v 8.4 -c config-file=/etc/postgresql/8.4/main/postgresql.conf testing2

[jorgearevalo]

Valgrind output of postgres executing query that caused a crash

[jorgearevalo]

Ok, one missed PG_FREE_IF_COPY call in line 2034 was causing the memory issue. Now I've problems with regress tests rt_asgdalraster, rt_asjpeg and rt_aspng. Working of them. Attached the diff files.

[strk]

A missed PG_FREE can cause memory leaks, not segfaults, which is what this ticket is about now, right ?

[Bborie Park]

The ticket for the regression failures in rt_asgdalraster, rt_asjpeg, rt_aspng is #957. I'm working on it.

[jorgearevalo]

I'm getting the regress results of pgis_reg_27067 in a 32b Ubuntu 9.10 machine with r7202. No memory leaks neither segfaults. Only the failures of ticket #957.

Could you please give it a try?

[strk]

Ok, no more segfault, but in addition to the rt_asgdalraster (#957) I also have a failure in rt_asjpeg and rt_aspng. Let's close this one and use #957 for them.