[Gambas-user] [Fwd: Gambas3 Pointers example] signal #6
Demosthenes Koptsis
demosthenesk at ...626...
Sun Jan 9 14:59:08 CET 2011
this example on pointers raises signal #6.
Gambas3 svn3432 Ubuntu 10.04, AMD64
---------------------------
' Gambas module file
'char *getwd(char *buf);
Extern getwd(buf As Pointer) As Pointer In "libc:6"
Public Sub Main()
Dim pBuf As Pointer
Dim pFunc As Pointer
Dim sWorkingDirectory As String
'getwd
pBuf = Alloc(SizeOf(gb.String))
pFunc = Alloc(SizeOf(gb.String))
pFunc = getwd(pBuf)
sWorkingDirectory = Str@(pFunc)
Free(pFunc)
Free(pBuf)
Print sWorkingDirectory
End
---------------------------
output:
---------------------------
*** glibc detected *** Pointers86: free(): invalid next size (fast):
0x0000000001af39a0 ***
======= Backtrace: =========
/lib/libc.so.6(+0x775b6)[0x7f4d6a2495b6]
/lib/libc.so.6(cfree+0x73)[0x7f4d6a24fe83]
Pointers86[0x405308]
Pointers86[0x422f50]
/lib/libc.so.6(__libc_start_main+0xfd)[0x7f4d6a1f0c4d]
Pointers86[0x4043f9]
======= Memory map: ========
00400000-00445000 r-xp 00000000 08:14
2377106 /usr/local/bin/gbx3
00644000-00645000 r--p 00044000 08:14
2377106 /usr/local/bin/gbx3
00645000-0064f000 rw-p 00045000 08:14
2377106 /usr/local/bin/gbx3
0064f000-00651000 rw-p 00000000 00:00 0
01ade000-01aff000 rw-p 00000000 00:00 0
[heap]
7f4d64000000-7f4d64021000 rw-p 00000000 00:00 0
7f4d64021000-7f4d68000000 ---p 00000000 00:00 0
7f4d69fbb000-7f4d69fd1000 r-xp 00000000 08:14
1179728 /lib/libgcc_s.so.1
7f4d69fd1000-7f4d6a1d0000 ---p 00016000 08:14
1179728 /lib/libgcc_s.so.1
7f4d6a1d0000-7f4d6a1d1000 r--p 00015000 08:14
1179728 /lib/libgcc_s.so.1
7f4d6a1d1000-7f4d6a1d2000 rw-p 00016000 08:14
1179728 /lib/libgcc_s.so.1
7f4d6a1d2000-7f4d6a34c000 r-xp 00000000 08:14
1180003 /lib/libc-2.11.1.so
7f4d6a34c000-7f4d6a54b000 ---p 0017a000 08:14
1180003 /lib/libc-2.11.1.so
7f4d6a54b000-7f4d6a54f000 r--p 00179000 08:14
1180003 /lib/libc-2.11.1.so
7f4d6a54f000-7f4d6a550000 rw-p 0017d000 08:14
1180003 /lib/libc-2.11.1.so
7f4d6a550000-7f4d6a555000 rw-p 00000000 00:00 0
7f4d6a555000-7f4d6a55c000 r-xp 00000000 08:14
2231491 /usr/lib/libffi.so.5.0.10
7f4d6a55c000-7f4d6a75b000 ---p 00007000 08:14
2231491 /usr/lib/libffi.so.5.0.10
7f4d6a75b000-7f4d6a75c000 r--p 00006000 08:14
2231491 /usr/lib/libffi.so.5.0.10
7f4d6a75c000-7f4d6a75d000 rw-p 00007000 08:14
2231491 /usr/lib/libffi.so.5.0.10
7f4d6a75d000-7f4d6a775000 r-xp 00000000 08:14
1180001 /lib/libpthread-2.11.1.so
7f4d6a775000-7f4d6a974000 ---p 00018000 08:14
1180001 /lib/libpthread-2.11.1.so
7f4d6a974000-7f4d6a975000 r--p 00017000 08:14
1180001 /lib/libpthread-2.11.1.so
7f4d6a975000-7f4d6a976000 rw-p 00018000 08:14
1180001 /lib/libpthread-2.11.1.so
7f4d6a976000-7f4d6a97a000 rw-p 00000000 00:00 0
7f4d6a97a000-7f4d6a97c000 r-xp 00000000 08:14
1180008 /lib/libdl-2.11.1.so
7f4d6a97c000-7f4d6ab7c000 ---p 00002000 08:14
1180008 /lib/libdl-2.11.1.so
7f4d6ab7c000-7f4d6ab7d000 r--p 00002000 08:14
1180008 /lib/libdl-2.11.1.so
7f4d6ab7d000-7f4d6ab7e000 rw-p 00003000 08:14
1180008 /lib/libdl-2.11.1.so
7f4d6ab7e000-7f4d6ac00000 r-xp 00000000 08:14
1179958 /lib/libm-2.11.1.so
7f4d6ac00000-7f4d6adff000 ---p 00082000 08:14
1179958 /lib/libm-2.11.1.so
7f4d6adff000-7f4d6ae00000 r--p 00081000 08:14
1179958 /lib/libm-2.11.1.so
7f4d6ae00000-7f4d6ae01000 rw-p 00082000 08:14
1179958 /lib/libm-2.11.1.so
7f4d6ae01000-7f4d6ae21000 r-xp 00000000 08:14
1179985 /lib/ld-2.11.1.so
7f4d6ae95000-7f4d6ae96000 rw-p 00000000 00:00 0
7f4d6ae96000-7f4d6aed5000 r--p 00000000 08:14
2237984 /usr/lib/locale/en_US.utf8/LC_CTYPE
7f4d6aed5000-7f4d6aff3000 r--p 00000000 08:14
2239899 /usr/lib/locale/en_US.utf8/LC_COLLATE
7f4d6aff3000-7f4d6aff7000 rw-p 00000000 00:00 0
7f4d6b00b000-7f4d6b00c000 r--p 00000000 08:14
2237989 /usr/lib/locale/en_US.utf8/LC_NUMERIC
7f4d6b00c000-7f4d6b00d000 r--p 00000000 08:14
2232077 /usr/lib/locale/en_US.utf8/LC_TIME
7f4d6b00d000-7f4d6b00e000 r--p 00000000 08:14
2234328 /usr/lib/locale/en_US.utf8/LC_MONETARY
7f4d6b00e000-7f4d6b00f000 r--p 00000000 08:14
2235935 /usr/lib/locale/en_US.utf8/LC_MESSAGES/SYS_LC_MESSAGES
7f4d6b00f000-7f4d6b010000 r--p 00000000 08:14
2237938 /usr/lib/locale/en_US.utf8/LC_PAPER
7f4d6b010000-7f4d6b011000 r--p 00000000 08:14
2237858 /usr/lib/locale/en_US.utf8/LC_NAME
7f4d6b011000-7f4d6b012000 r--p 00000000 08:14
2235936 /usr/lib/locale/en_US.utf8/LC_ADDRESS
7f4d6b012000-7f4d6b013000 r--p 00000000 08:14
2235937 /usr/lib/locale/en_US.utf8/LC_TELEPHONE
7f4d6b013000-7f4d6b014000 r--p 00000000 08:14
2239858 /usr/lib/locale/en_US.utf8/LC_MEASUREMENT
7f4d6b014000-7f4d6b01b000 r--s 00000000 08:14
2233563 /usr/lib/gconv/gconv-modules.cache
7f4d6b01b000-7f4d6b01c000 r--p 00000000 08:14
2235940 /usr/lib/locale/en_US.utf8/LC_IDENTIFICATION
7f4d6b01c000-7f4d6b020000 rw-p 00000000 00:00 0
7f4d6b020000-7f4d6b021000 r--p 0001f000 08:14
1179985 /lib/ld-2.11.1.so
7f4d6b021000-7f4d6b022000 rw-p 00020000 08:14
1179985 /lib/ld-2.11.1.so
7f4d6b022000-7f4d6b023000 rw-p 00000000 00:00 0
7fff5c542000-7fff5c557000 rw-p 00000000 00:00 0
[stack]
7fff5c5ff000-7fff5c600000 r-xp 00000000 00:00 0
[vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0
[vsyscall]
/mnt/store/LINUX/DOCUMENTS/DEVELOPMENT/Gambas/Προγραμματισμός σε
Gambas/Το βιβλίο της Gambas3/Projects/Pointers86
---------------------------
the last line is in Greek some part, it is the name of current
directory.
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