[#6319] latency benchmark on xenomai built into shared flat binary exits with NULL pointer access
Submitted By: Sonic Zhang
Open Date
2010-10-26 22:38:23
Priority:
Medium Assignee:
Aaron Wu
Status:
Open Fixed In Release:
N/A
Found In Release:
2010R1 Release:
Category:
N/A Board:
STAMP
Processor:
BF537 Silicon Revision:
Is this bug repeatable?:
Yes Resolution:
Assigned (Not Start)
Uboot version or rev.:
Toolchain version or rev.:
2010R1-RC4
App binary format:
N/A
Summary: latency benchmark on xenomai built into shared flat binary exits with NULL pointer access
Details:
After apply Mike's patch in bug 6195 and built xenomai into shared flat binary, latency benchmark crashes with NULL pointer access.
No this problem in FLAT and FDPIC binary formats.
root:/> latency -h
Xenomai: WARNING, this version of Xenomai kernel is anterior to 2.5.2.NULL pointer access
Deferred Exception context
CURRENT PROCESS:
COMM=latency PID=244 CPU=0
TEXT = 0x02b30040-0x02b3af60 DATA = 0x02af0020-0x02af1dc8
BSS = 0x02af1dc8-0x02af82a0 USER-STACK = 0x02af9f70
return address: [0x02b3786e]; contents of:
0x02b37840: 6008 6002 0062 e52a 01b1 e428 008f 6001
0x02b37850: 0062 e801 0000 05ab 0010 0000 05fb e800
0x02b37860: 002b e52d ffff 6008 e52a 0093 9152 [9310]
0x02b37870: e52a 0145 9110 0c00 1404 e52a 0090 0062
ADSP-BF537-0.2 500(MHz CCLK) 125(MHz SCLK) (mpu off)
Linux version 2.6.34.7-ADI-2010R1-svn9290 (root@eight) (gcc version 4.3.5 (ADI-2010R1-RC4) ) #4 Tue Oct 26 10:19:21 CST 2010
SEQUENCER STATUS: Not tainted
SEQSTAT: 00060027 IPEND: 0008 IMASK: ffff SYSCFG: 0006
EXCAUSE : 0x27
physical IVG3 asserted : <0xffa007e0> { _trap + 0x0 }
RETE: <0x00000000> /* Maybe null pointer? */
RETN: <0x02b24000> /* kernel dynamic memory */
RETX: <0x00000480> /* Maybe fixed code section */
RETS: <0x02b37a40> [ /usr/bin/latency + 0x7a00 ]
PC : <0x02b3786e> [ /usr/bin/latency + 0x782e ]
DCPLB_FAULT_ADDR: <0x00000000> /* Maybe null pointer? */
ICPLB_FAULT_ADDR: <0x02b3786e> [ /usr/bin/latency + 0x782e ]
PROCESSOR STATE:
R0 : 00000001 R1 : 02af9dd0 R2 : 02b3228c R3 : 00000003
R4 : 00000000 R5 : 02af9e10 R6 : 02b3228c R7 : 02af9dd0
P0 : 02af9ddc P1 : 02b32418 P2 : 00000000 P3 : 00000000
P4 : 02af9dd0 P5 : 02af0020 FP : 02af8c54 SP : 02b23f24
LB0: 02952fc9 LT0: 02952fc6 LC0: 00000000
LB1: 0294fd95 LT1: 0294fd94 LC1: 00000000
B0 : 00000000 L0 : 00000000 M0 : 00000000 I0 : 02b048c4
B1 : 00000000 L1 : 00000000 M1 : 00000000 I1 : 00000002
B2 : 00000000 L2 : 00000000 M2 : 00000000 I2 : 00000000
B3 : 00000000 L3 : 00000000 M3 : 00000000 I3 : 00000000
A0.w: 00000000 A0.x: 00000000 A1.w: 00000000 A1.x: 00000000
USP : 02af8ba8 ASTAT: 02003066
Hardware Trace:
0 Target : <0x00003f18> { _trap_c + 0x0 }
Source : <0xffa00774> { _exception_to_level5 + 0xa4 } CALL pcrel
1 Target : <0xffa006d0> { _exception_to_level5 + 0x0 }
Source : <0xffa00584> { _bfin_return_from_exception + 0x20 } RTX
2 Target : <0xffa00564> { _bfin_return_from_exception + 0x0 }
Source : <0xffa00628> { _ex_trap_c + 0x74 } JUMP.S
3 Target : <0xffa005b4> { _ex_trap_c + 0x0 }
Source : <0xffa0048c> { _ex_workaround_261 + 0x1c } JUMP.S
4 Target : <0xffa00470> { _ex_workaround_261 + 0x0 }
Source : <0xffa00848> { _trap + 0x68 } JUMP (P4)
5 Target : <0xffa007fe> { _trap + 0x1e }
Source : <0xffa007fa> { _trap + 0x1a } IF CC JUMP pcrel
6 Target : <0xffa007e0> { _trap + 0x0 }
FAULT : <0x02b3786e> [ /usr/bin/latency + 0x782e ] [P2] = R0
Source : <0xffa00584> { _bfin_return_from_exception + 0x20 } RTX
7 Target : <0xffa00564> { _bfin_return_from_exception + 0x0 }
Source : <0xffa00482> { _ex_workaround_261 + 0x12 } IF !CC JUMP pcrel
8 Target : <0xffa00470> { _ex_workaround_261 + 0x0 }
Source : <0xffa00848> { _trap + 0x68 } JUMP (P4)
9 Target : <0xffa007fe> { _trap + 0x1e }
Source : <0xffa007fa> { _trap + 0x1a } IF CC JUMP pcrel
10 Target : <0xffa007e0> { _trap + 0x0 }
Source : <0x02b3786c> [ /usr/bin/latency + 0x782c ] P2 = [P2]
11 Target : <0x02b3785c> [ /usr/bin/latency + 0x781c ]
Source : <0x02b37a3e> [ /usr/bin/latency + 0x79fe ] CALL (P2)
12 Target : <0x02b37a20> [ /usr/bin/latency + 0x79e0 ]
Source : <0x02b329fc> [ /usr/bin/latency + 0x29bc ] JUMP (P2)
13 Target : <0x02b329e8> [ /usr/bin/latency + 0x29a8 ]
Source : <0x02b32524> [ /usr/bin/latency + 0x24e4 ] CALL (P2)
14 Target : <0x02b3250c> [ /usr/bin/latency + 0x24cc ]
Source : <0x02b325ac> [ /usr/bin/latency + 0x256c ] JUMP.S
15 Target : <0x02b325ac> [ /usr/bin/latency + 0x256c ]
Source : <0x02b34166> [ /usr/bin/latency + 0x4126 ] RTS
Userspace Stack
Stack info:
SP: [0x02af8ba8] <0x02af8ba8> [ latency + 0x8ba8 ]
Memory from 0x02af8ba0 to 02af9000
02af8ba0: 02b049bc 00000095 [00000095] 00000001 02af1578 00000000 0000ee6b 00040000
02af8bc0:<02b38a5a> 02952424 02b00020 02b049bc 02b383f8 02b38494 00000000 02af945c
02af8be0:<02b33c62> 02af0020 00000001 02af8c04 0004022b 00000000 02af8c1c 02af8c34
02af8c00:<02b33e2e> 00000000 4b82fa09 02af1f74 02af8c3c <02b37ca8> 02af8c3c <02b37cb6>
02af8c20: 02af0020 02af1fb8 00000000 00000001 02af1fb0 02b33cd0 00000001 02af8c74
02af8c40:<02b35a02> 02af0020 02af1f54 02b33cd0 00000001 02af8d0c <02b37a40> 02af0020
02af8c60: 02af9dd0 00000000 02af9dd0 00000000 00000000 02af94f4 <02b33c62> 02af0020
02af8c80: 00000003 02af8c9c 0004022b 00000000 00000000 00000000 00000000 00000000
02af8ca0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8cc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8ce0: 00000000 00000000 00000000 00000000 00000000 00000000 02af8d14 <02b34334>
02af8d00: 02af0020 02af9e14 <02b34286> 02af9e18 <02b32526> 02af0020 02af9dd0 00000000
02af8d20: 00005000 00008000 02af9588 00000000 00000000 00000000 02af9df4 02af9e08
02af8d40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8d60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8d80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8da0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8dc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8de0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8e00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8e20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8e40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8e60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8e80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8ea0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8ec0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8ee0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8f00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8f20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8f40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8f60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8f80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8fa0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
02af8fe0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Return addresses in stack:
address : <0x02b38a5a> [ /usr/bin/latency + 0x8a1a ]
address : <0x02b33c62> [ /usr/bin/latency + 0x3c22 ]
address : <0x02b33e2e> [ /usr/bin/latency + 0x3dee ]
address : <0x02b37ca8> [ /usr/bin/latency + 0x7c68 ]
address : <0x02b37cb6> [ /usr/bin/latency + 0x7c76 ]
address : <0x02b35a02> [ /usr/bin/latency + 0x59c2 ]
address : <0x02b37a40> [ /usr/bin/latency + 0x7a00 ]
address : <0x02b33c62> [ /usr/bin/latency + 0x3c22 ]
address : <0x02b34334> [ /usr/bin/latency + 0x42f4 ]
address : <0x02b34286> [ /usr/bin/latency + 0x4246 ]
address : <0x02b32526> [ /usr/bin/latency + 0x24e6 ]
It can cause memory corruption on thread termination.
Upgrade is recommended.
SEGV
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