In Linux, when pressing key '.' on db2top welcome page in
interactive mode, db2top will crash.
<StackTrace>
---FUNC-ADDR---- ------FUNCTION + OFFSET------
0000002A96F6DF7F ossDumpStackTraceEx + 0x01f7
(/view/db2_v95fp4_linuxamd64_s090429/vbs/INST/lib/libdb2osse.so.
1)
0000002A96F69ABA _ZN11OSSTrapFile6dumpExEmiP7siginfoPvm + 0x00b4
(/view/db2_v95fp4_linuxamd64_s090429/vbs/INST/lib/libdb2osse.so.
1)
0000002A96F69B81 _ZN11OSSTrapFile4dumpEmiP7siginfoPv + 0x0009
(/view/db2_v95fp4_linuxamd64_s090429/vbs/INST/lib/libdb2osse.so.
1)
0000002A9618733B sqlo_trce + 0x03f3
(/view/db2_v95fp4_linuxamd64_s090429/vbs/INST/lib/libdb2.so.1)
000000000044E1E7 interrupt + 0x00ef
(db2top)
0000002A97AAE380 address: 0x0000002A97AAE380 ; dladdress:
0x0000002A97A80000 ; offset in lib: 0x000000000002E380 ;
(/lib64/tls/libc.so.6)
0000002A97AA840E isdigit + 0x001e
(/lib64/tls/libc.so.6)
0000000000442BCB do_foreground + 0x03af
(db2top)
0000000000441BED main + 0x00d9
(db2top)
0000002A97A9CACD __libc_start_main + 0x00fd
(/lib64/tls/libc.so.6)
00000000004173AA __gxx_personality_v0 + 0x007a
(db2top)
</StackTrace>
that is because in main.c - > do_foreground() -> isdigit(ch),
when pressing char '.', ch will be assigned to old_ch, where
old_ch was declared as " int old_ch " without initialization. On
welcome page, old_ch hasn't be assigned to any value, yet.
Hence,
In Linux, isdigit(ch) will triger SIGSEGV, In AIX, this is fine,
though.
Fix: Initialize ch and old_chr to 0 when declaring variables. |
