* Cygwin64: allocating too much memory causes a crash (corrected)
@ 2013-09-10 16:09 Bengt Larsson
2013-10-15 8:18 ` Corinna Vinschen
0 siblings, 1 reply; 6+ messages in thread
From: Bengt Larsson @ 2013-09-10 16:09 UTC (permalink / raw)
To: cygwin
[-- Attachment #1: Type: text/plain, Size: 188 bytes --]
(I'm sorry I attached the wrong file. This should be right.)
On Cygwin64, if I malloc too much memory I get a stackdump, instead of a
NULL in return (for example testmalloc 5000000000).
[-- Attachment #2: testmalloc.c --]
[-- Type: application/octet-stream, Size: 339 bytes --]
#include <stdlib.h>
#include <stdio.h>
int
main(int argc, char *argv[])
{
size_t size = 1000000;
if (argc > 1) {
if (sscanf(argv[1], "%zu", &size) != 1) {
printf("Not a number\n");
return 1;
}
}
printf("size = %zu\n", size);
if (malloc(size) != NULL) {
printf("OK!\n");
} else {
printf("NULL!\n");
}
return 0;
}
[-- Attachment #3: testmalloc.exe.stackdump --]
[-- Type: application/octet-stream, Size: 1286 bytes --]
Exception: STATUS_ACCESS_VIOLATION at rip=00180144795
rax=000006FFD5FA0000 rbx=000000012A060000 rcx=000000012A060000
rdx=000006FFD5FA0000 rsi=000000012A05F210 rdi=000000000022AB26
r8 =000000012A05FFE2 r9 =0000000000000001 r10=0000000000000000
r11=0000000000000206 r12=0000000000000001 r13=0000000000000000
r14=0000000000000000 r15=000000000022AB26
rbp=000000000022AB80 rsp=000000000022A990
program=C:\Eget\src\mysrc\testmalloc.exe, pid 4236, thread main
cs=0033 ds=002B es=002B fs=0053 gs=002B ss=002B
Stack trace:
Frame Function Args
0000022AB80 00180144795 (00000000000, 0000022AB26, 0018017F9EC, 00180173AE0)
0000022AB80 001800C0169 (0012A05F200, 00100403033, 00000000001, 0000022AB80)
0000022AB80 001801130AB (00100403033, 00000000001, 0000022AB80, 0012A05F200)
0000022AB80 00600039F80 (00000000001, 0000022AB80, 0012A05F200, 00000000000)
0000022AB80 0012A05F200 (0000022AB80, 0012A05F200, 00000000000, 0000022AAF0)
0000022AB80 00100403033 (0012A05F200, 00000000000, 0000022AAF0, 00600039F80)
0000022AB80 00000000001 (00000000000, 0000022AAF0, 00600039F80, 0018004835B)
0000022AB80 0000022AB80 (0000022AAF0, 00600039F80, 0018004835B, 00000000000)
0000022AB80 0012A05F200 (0000022AAF0, 00600039F80, 0018004835B, 00000000000)
End of stack trace
[-- Attachment #4: cygcheck.out --]
[-- Type: application/octet-stream, Size: 15804 bytes --]
Cygwin Configuration Diagnostics
Current System Time: Tue Sep 10 17:56:11 2013
Windows 7 Home Premium Ver 6.1 Build 7601 Service Pack 1
Path: C:\Users\Bengt\Documents\Command
C:\Eget\Command
C:\Eget\Perl64\bin
C:\Eget\cygwin64\bin
C:\Windows\system32
C:\Windows
C:\Windows\System32\Wbem
C:\Windows\System32\WindowsPowerShell\v1.0\
Output from C:\Eget\cygwin64\bin\id.exe
UID: 1001(Bengt) GID: 545(Users)
545(Users) 513(None)
SysDir: C:\Windows\system32
WinDir: C:\Windows
CYGWIN = 'glob:ignorecase'
HOME = 'C:\Eget\Home\Bengt'
Path = 'C:\Users\Bengt\Documents\Command;C:\Eget\Command;C:\Eget\Perl64\bin;C:\Eget\cygwin64\bin;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\'
ALLUSERSPROFILE = 'C:\ProgramData'
APPDATA = 'C:\Users\Bengt\AppData\Roaming'
BINDDIR = 'C:\Eget\bind'
CommonProgramFiles = 'C:\Program Files\Common Files'
CommonProgramFiles(x86) = 'C:\Program Files (x86)\Common Files'
CommonProgramW6432 = 'C:\Program Files\Common Files'
COMPUTERNAME = 'LAPTOP2'
ComSpec = 'C:\Windows\system32\cmd.exe'
CYGBIN = 'C:\Eget\cygwin64\bin'
CYGBIN32 = 'C:\Eget\cygwin\bin'
FP_NO_HOST_CHECK = 'NO'
GZIP = '-9'
HOMEDRIVE = 'C:'
HOMEPATH = '\Users\Bengt'
INFOPATH = '/usr/local/info:/usr/share/info:/usr/info'
LANG = 'C.UTF-8'
LESS = '-eMc -j.5'
LOCALAPPDATA = 'C:\Users\Bengt\AppData\Local'
LOGONSERVER = '\\LAPTOP2'
MANPATH = '/c/Eget/man:/usr/local/man:/usr/share/man:/usr/man:/usr/ssl/man'
MYCOMMAND = 'C:\Users\Bengt\Documents\Command'
MYDESKTOP = 'C:\Users\Bengt\Desktop'
MYDOCUMENTS = 'C:\Users\Bengt\Documents'
NUMBER_OF_PROCESSORS = '2'
OS = 'Windows_NT'
PATHEXT = '.COM;.EXE;.BAT;.CMD;.PCMD;.SHCMD;.BASHCMD'
PROCESSOR_ARCHITECTURE = 'AMD64'
PROCESSOR_IDENTIFIER = 'Intel64 Family 6 Model 42 Stepping 7, GenuineIntel'
PROCESSOR_LEVEL = '6'
PROCESSOR_REVISION = '2a07'
ProgramData = 'C:\ProgramData'
ProgramFiles = 'C:\Program Files'
ProgramFiles(x86) = 'C:\Program Files (x86)'
ProgramW6432 = 'C:\Program Files'
PROMPT = '$P$G'
PSModulePath = 'C:\Windows\system32\WindowsPowerShell\v1.0\Modules\'
PUBLIC = 'C:\Users\Public'
SESSIONNAME = 'Console'
SHELL = '/bin/bash'
SystemDrive = 'C:'
SystemRoot = 'C:\Windows'
TEMP = 'C:\Users\Bengt\AppData\Local\Temp'
TMP = 'C:\Users\Bengt\AppData\Local\Temp'
UNZIP = '-C'
USERDOMAIN = 'Laptop2'
USERNAME = 'Bengt'
USERPROFILE = 'C:\Users\Bengt'
windir = 'C:\Windows'
windows_tracing_flags = '3'
windows_tracing_logfile = 'C:\BVTBin\Tests\installpackage\csilogfile.log'
HKEY_CURRENT_USER\Software\Cygwin
HKEY_CURRENT_USER\Software\Cygwin\Installations
(default) = '\??\C:\Eget\cygwin'
f65bc92163f7c37a = '\??\C:\Eget\cygwin64'
HKEY_CURRENT_USER\Software\Cygwin\Program Options
HKEY_CURRENT_USER\Software\Cygwin\setup
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mg-cygwin
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mg-cygwin\OpenWithList
(default) = 'win32pad.exe'
MRUList = 'a'
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mg-cygwin\OpenWithProgids
(default) = (unsupported type)
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mg-cygwin-alt
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.mg-cygwin-alt\OpenWithList
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\RecentDocs\.mg-cygwin
(default) = (unsupported type)
MRUListEx = (unsupported type)
HKEY_CURRENT_USER\Software\Classes\.mg-cygwin
(default) = 'mg-cygwin_auto_file'
HKEY_CURRENT_USER\Software\Classes\mg-cygwin_auto_file
(default) = 'Mg Cygwin init file'
HKEY_CURRENT_USER\Software\Classes\mg-cygwin_auto_file\shell
HKEY_CURRENT_USER\Software\Classes\mg-cygwin_auto_file\shell\open
HKEY_CURRENT_USER\Software\Classes\mg-cygwin_auto_file\shell\open\command
(default) = '"C:\Eget\Win32Pad\win32pad.exe" "%1"'
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Installations
(default) = '\??\C:\Eget\cygwin64'
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Program Options
HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\setup
(default) = 'C:\Eget\cygwin64'
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Cygwin
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Cygwin\Installations
(default) = '\??\C:\Eget\cygwin'
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Cygwin\Program Options
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Cygwin\setup
(default) = 'C:\Eget\cygwin'
obcaseinsensitive set to 1
Cygwin installations found in the registry:
System: Key: f65bc92163f7c37a Path: C:\Eget\cygwin64
User: Key: 7957b66a3659267c Path: C:\Eget\cygwin
User: Key: f65bc92163f7c37a Path: C:\Eget\cygwin64
c: hd NTFS 288758Mb 49% CP CS UN PA FC Acer
C:\Users\Bengt\Documents /docs user binary,notexec,noacl
C:\Eget\cygwin64 / system binary,auto
C: /c system binary,notexec,noacl
D: /d system binary,notexec,noacl
C:\Eget\Home /home system binary,noacl
C:\Users /users system binary,notexec,noacl
C:\Eget\cygwin64\bin /usr/bin system binary,auto
C:\Eget\cygwin64\lib /usr/lib system binary,auto
cygdrive prefix /cygdrive user binary,posix=0,auto
Found: C:\Eget\cygwin64\bin\awk
-> C:\Eget\cygwin64\bin\gawk.exe
Found: C:\Eget\cygwin64\bin\bash.exe
Found: C:\Eget\cygwin64\bin\cat.exe
Found: C:\Eget\cygwin64\bin\cp.exe
Found: C:\Eget\cygwin64\bin\cpp.exe
Not Found: crontab
Found: C:\Eget\cygwin64\bin\find.exe
Found: C:\Windows\system32\find.exe
Warning: C:\Eget\cygwin64\bin\find.exe hides C:\Windows\system32\find.exe
Found: C:\Eget\cygwin64\bin\gcc.exe
Not Found: gdb
Found: C:\Eget\cygwin64\bin\grep.exe
Found: C:\Eget\cygwin64\bin\kill.exe
Found: C:\Eget\cygwin64\bin\ld.exe
Found: C:\Eget\cygwin64\bin\ls.exe
Found: C:\Eget\cygwin64\bin\make.exe
Found: C:\Eget\cygwin64\bin\mv.exe
Not Found: patch
Found: C:\Eget\Perl64\bin\perl.exe
Found: C:\Eget\cygwin64\bin\perl.exe
Warning: C:\Eget\Perl64\bin\perl.exe hides C:\Eget\cygwin64\bin\perl.exe
Found: C:\Eget\cygwin64\bin\rm.exe
Found: C:\Eget\cygwin64\bin\sed.exe
Not Found: ssh
Found: C:\Eget\cygwin64\bin\sh.exe
Found: C:\Eget\cygwin64\bin\tar.exe
Found: C:\Eget\cygwin64\bin\test.exe
Found: C:\Eget\cygwin64\bin\vi.exe
Not Found: vim
87k 2013/07/27 C:\Eget\cygwin64\bin\cygatomic-1.dll - os=4.0 img=0.0 sys=5.2
"cygatomic-1.dll" v0.0 ts=2013-07-27 13:20
16k 2013/03/26 C:\Eget\cygwin64\bin\cygattr-1.dll - os=4.0 img=0.0 sys=5.2
"cygattr-1.dll" v0.0 ts=2013-03-26 18:26
64k 2013/03/07 C:\Eget\cygwin64\bin\cygbz2-1.dll - os=4.0 img=0.0 sys=5.2
"cygbz2-1.dll" v0.0 ts=2013-03-07 03:54
117k 2013/05/05 C:\Eget\cygwin64\bin\cygcloog-isl-4.dll - os=4.0 img=0.0 sys=5.2
"cygcloog-isl-4.dll" v0.0 ts=2013-05-05 17:41
9k 2013/03/07 C:\Eget\cygwin64\bin\cygcrypt-0.dll - os=4.0 img=0.0 sys=5.2
"cygcrypt-0.dll" v0.0 ts=2013-03-07 10:29
1526k 2013/03/08 C:\Eget\cygwin64\bin\cygdb-5.3.dll - os=4.0 img=0.0 sys=5.2
"cygdb-5.3.dll" v0.0 ts=2013-03-08 08:55
111k 2013/03/08 C:\Eget\cygwin64\bin\cygdb_cxx-5.3.dll - os=4.0 img=0.0 sys=5.2
"cygdb_cxx-5.3.dll" v0.0 ts=2013-03-08 08:56
472k 2013/03/08 C:\Eget\cygwin64\bin\cygdb_sql-5.3.dll - os=4.0 img=0.0 sys=5.2
"cygdb_sql-5.3.dll" v0.0 ts=2013-03-08 08:58
147k 2013/07/31 C:\Eget\cygwin64\bin\cygexpat-1.dll - os=4.0 img=0.0 sys=5.2
"cygexpat-1.dll" v0.0 ts=2013-07-31 23:53
53k 2013/05/06 C:\Eget\cygwin64\bin\cygformw-10.dll - os=4.0 img=0.0 sys=5.2
"cygformw-10.dll" v0.0 ts=2013-05-06 09:10
67k 2013/07/27 C:\Eget\cygwin64\bin\cyggcc_s-seh-1.dll - os=4.0 img=0.0 sys=5.2
"cyggcc_s-seh-1.dll" v0.0 ts=2013-07-27 12:45
29k 2013/03/11 C:\Eget\cygwin64\bin\cyggdbm-4.dll - os=4.0 img=0.0 sys=5.2
"cyggdbm-4.dll" v0.0 ts=2013-03-11 05:00
12k 2013/03/11 C:\Eget\cygwin64\bin\cyggdbm_compat-4.dll - os=4.0 img=0.0 sys=5.2
"cyggdbm_compat-4.dll" v0.0 ts=2013-03-11 05:01
443k 2013/08/04 C:\Eget\cygwin64\bin\cyggmp-10.dll - os=4.0 img=0.0 sys=5.2
"cyggmp-10.dll" v0.0 ts=2013-08-04 21:58
46k 2013/07/27 C:\Eget\cygwin64\bin\cyggomp-1.dll - os=4.0 img=0.0 sys=5.2
"cyggomp-1.dll" v0.0 ts=2013-07-27 12:48
29k 2013/03/14 C:\Eget\cygwin64\bin\cyghistory7.dll - os=4.0 img=0.0 sys=5.2
"cyghistory7.dll" v0.0 ts=2013-03-14 11:14
998k 2013/03/07 C:\Eget\cygwin64\bin\cygiconv-2.dll - os=4.0 img=0.0 sys=5.2
"cygiconv-2.dll" v0.0 ts=2013-03-07 04:03
38k 2013/06/24 C:\Eget\cygwin64\bin\cygintl-8.dll - os=4.0 img=0.0 sys=5.2
"cygintl-8.dll" v0.0 ts=2013-06-24 05:36
888k 2013/05/05 C:\Eget\cygwin64\bin\cygisl-10.dll - os=4.0 img=0.0 sys=5.2
"cygisl-10.dll" v0.0 ts=2013-05-05 17:36
6k 2013/08/31 C:\Eget\cygwin64\bin\cyglsa64.dll - os=4.0 img=0.0 sys=5.2
"cyglsa64.dll" v0.0 ts=2013-08-31 20:36
129k 2013/03/07 C:\Eget\cygwin64\bin\cyglzma-5.dll - os=4.0 img=0.0 sys=5.2
"cyglzma-5.dll" v0.0 ts=2013-03-07 11:20
102k 2013/03/19 C:\Eget\cygwin64\bin\cygmagic-1.dll - os=4.0 img=0.0 sys=5.2
"cygmagic-1.dll" v0.0 ts=2013-03-19 14:27
28k 2013/05/06 C:\Eget\cygwin64\bin\cygmenuw-10.dll - os=4.0 img=0.0 sys=5.2
"cygmenuw-10.dll" v0.0 ts=2013-05-06 09:10
85k 2013/05/05 C:\Eget\cygwin64\bin\cygmpc-3.dll - os=4.0 img=0.0 sys=5.2
"cygmpc-3.dll" v0.0 ts=2013-05-05 14:46
319k 2013/05/05 C:\Eget\cygwin64\bin\cygmpfr-4.dll - os=4.0 img=0.0 sys=5.2
"cygmpfr-4.dll" v0.0 ts=2013-05-05 14:40
52k 2013/05/06 C:\Eget\cygwin64\bin\cygncurses++w-10.dll - os=4.0 img=0.0 sys=5.2
"cygncurses++w-10.dll" v0.0 ts=2013-05-06 09:14
295k 2013/05/06 C:\Eget\cygwin64\bin\cygncursesw-10.dll - os=4.0 img=0.0 sys=5.2
"cygncursesw-10.dll" v0.0 ts=2013-05-06 09:08
13k 2013/05/06 C:\Eget\cygwin64\bin\cygpanelw-10.dll - os=4.0 img=0.0 sys=5.2
"cygpanelw-10.dll" v0.0 ts=2013-05-06 09:09
289k 2013/08/04 C:\Eget\cygwin64\bin\cygpcre-1.dll - os=4.0 img=0.0 sys=5.2
"cygpcre-1.dll" v0.0 ts=2013-08-05 00:51
1580k 2013/03/11 C:\Eget\cygwin64\bin\cygperl5_14.dll - os=4.0 img=0.0 sys=5.2
"cygperl5_14.dll" v0.0 ts=2013-03-12 00:25
40k 2013/03/07 C:\Eget\cygwin64\bin\cygpopt-0.dll - os=4.0 img=0.0 sys=5.2
"cygpopt-0.dll" v0.0 ts=2013-03-07 13:01
302k 2013/07/27 C:\Eget\cygwin64\bin\cygquadmath-0.dll - os=4.0 img=0.0 sys=5.2
"cygquadmath-0.dll" v0.0 ts=2013-07-27 13:20
193k 2013/03/14 C:\Eget\cygwin64\bin\cygreadline7.dll - os=4.0 img=0.0 sys=5.2
"cygreadline7.dll" v0.0 ts=2013-03-14 11:14
11k 2013/07/27 C:\Eget\cygwin64\bin\cygssp-0.dll - os=4.0 img=0.0 sys=5.2
"cygssp-0.dll" v0.0 ts=2013-07-27 13:18
892k 2013/07/27 C:\Eget\cygwin64\bin\cygstdc++-6.dll - os=4.0 img=0.0 sys=5.2
"cygstdc++-6.dll" v0.0 ts=2013-07-27 13:02
51k 2013/05/06 C:\Eget\cygwin64\bin\cygticw-10.dll - os=4.0 img=0.0 sys=5.2
"cygticw-10.dll" v0.0 ts=2013-05-06 09:08
79k 2013/05/09 C:\Eget\cygwin64\bin\cygz.dll - os=4.0 img=0.0 sys=5.2
"cygz.dll" v0.0 ts=2013-05-09 23:20
3071k 2013/08/31 C:\Eget\cygwin64\bin\cygwin1.dll - os=4.0 img=0.0 sys=5.2
"cygwin1.dll" v0.0 ts=2013-08-31 20:37
Cygwin DLL version info:
DLL version: 1.7.25
DLL epoch: 19
DLL old termios: 5
DLL malloc env: 28
Cygwin conv: 181
API major: 0
API minor: 270
Shared data: 5
DLL identifier: cygwin1
Mount registry: 3
Cygwin registry name: Cygwin
Program options name: Program Options
Installations name: Installations
Cygdrive default prefix:
Build date:
Shared id: cygwin1S5
Can't find the cygrunsrv utility, skipping services check.
Cygwin Package Information
Last downloaded files to: C:\Eget\cygwin-package
Last downloaded files from: http://ftp.heanet.ie/pub/cygwin/
Package Version Status
alternatives 1.3.30c-10 OK
base-cygwin 3.3-1 OK
base-files 4.1-1 OK
bash 4.1.11-2 OK
binutils 2.23.52-5 OK
bzip2 1.0.6-2 OK
coreutils 8.15-3 OK
cygutils 1.4.14-1 OK
cygwin 1.7.25-1 OK
dash 0.5.7-4 OK
diffutils 3.3-1 OK
editrights 1.02-1 OK
file 5.13-1 OK
findutils 4.5.11-1 OK
gawk 4.1.0-1 OK
gcc-core 4.8.1-3 OK
grep 2.14-2 OK
groff 1.22.2-1 OK
gzip 1.4-1 OK
hostname 3.13-1 OK
ipc-utils 1.0-2 OK
less 458-1 OK
libatomic1 4.8.1-3 OK
libattr1 2.4.46-1 OK
libbz2_1 1.0.6-2 OK
libcloog-isl4 0.18.0-2 OK
libcrypt0 1.1-1 OK
libdb5.3 5.3.21-1 OK
libexpat-devel 2.1.0-3 OK
libexpat1 2.1.0-3 OK
Empty package libexpat1-devel
libexpat1-devel 2.1.0-3 OK
libgcc1 4.8.1-3 OK
libgdbm4 1.10-2 OK
libgmp10 5.1.2-1 OK
libgomp1 4.8.1-3 OK
libiconv2 1.14-1 OK
libintl8 0.18.1.1-3 OK
libisl10 0.11.1-2 OK
liblzma5 5.0.4-1 OK
libmpc3 1.0.1-2 OK
libmpfr4 3.1.2-1 OK
libncursesw-devel 5.9-4 OK
libncursesw10 5.9-4 OK
libpcre1 8.33-1 OK
libpopt0 1.16-1 OK
libquadmath0 4.8.1-3 OK
libreadline-devel 6.2-1 OK
libreadline7 6.2-1 OK
libssp0 4.8.1-3 OK
libstdc++6 4.8.1-3 OK
login 1.10-10 OK
make 3.82.90-1 OK
man 1.6g-2 OK
mintty 1.2-beta1-1 OK
ncurses 5.9-4 OK
perl 5.14.4-1 OK
rebase 4.4.0.1-1 OK
run 1.3.0-1 OK
sed 4.2.2-3 OK
tar 1.26-1 OK
terminfo 5.9-4 OK
texinfo 4.13-1 OK
tzcode 2013c-1 OK
unzip 6.0-1 OK
vim-minimal 7.3.1152-1 OK
w32api-headers 3.0b_svn5962-1 OK
w32api-runtime 3.0b_svn5962-2 OK
which 2.20-2 OK
xz 5.0.4-1 OK
zlib0 1.2.8-1 OK
Use -h to see help about each section
[-- Attachment #5: Type: text/plain, Size: 218 bytes --]
--
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Cygwin64: allocating too much memory causes a crash (corrected)
2013-09-10 16:09 Cygwin64: allocating too much memory causes a crash (corrected) Bengt Larsson
@ 2013-10-15 8:18 ` Corinna Vinschen
2013-10-15 13:53 ` Ryan Johnson
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: Corinna Vinschen @ 2013-10-15 8:18 UTC (permalink / raw)
To: cygwin
[-- Attachment #1: Type: text/plain, Size: 1109 bytes --]
On Sep 10 18:02, Bengt Larsson wrote:
> (I'm sorry I attached the wrong file. This should be right.)
>
> On Cygwin64, if I malloc too much memory I get a stackdump, instead of a
> NULL in return (for example testmalloc 5000000000).
Sorry for the late reply, I was abroad for a couple of weeks.
I just tried it myself and could easily reproduce the problem.
I found the culprit in mmap. It was using DWORD instead of size_t
for a variable which was used for rounding purposes. This accidentally
restricted the length of any allocation to < 4 Gigs(*). When called
from malloc, malloc would get a valid pointer, pointing to a too small
memory block. Writing the malloc fencepost then crashed.
Thanks for the report and especially the testcase! I applied a fix
and will provide a new developer snapshot with this fix on
http://cygwin.com/snapshots/ soon.
Corinna
(*) Naturally the 32 bit version would never see this problem...
--
Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Cygwin64: allocating too much memory causes a crash (corrected)
2013-10-15 8:18 ` Corinna Vinschen
@ 2013-10-15 13:53 ` Ryan Johnson
2013-10-16 12:12 ` Bengt Larsson
2013-10-16 20:28 ` Bengt Larsson
2 siblings, 0 replies; 6+ messages in thread
From: Ryan Johnson @ 2013-10-15 13:53 UTC (permalink / raw)
To: cygwin
On 15/10/2013 4:18 AM, Corinna Vinschen wrote:
> On Sep 10 18:02, Bengt Larsson wrote:
>> (I'm sorry I attached the wrong file. This should be right.)
>>
>> On Cygwin64, if I malloc too much memory I get a stackdump, instead of a
>> NULL in return (for example testmalloc 5000000000).
> Sorry for the late reply, I was abroad for a couple of weeks.
>
> I just tried it myself and could easily reproduce the problem.
> I found the culprit in mmap. It was using DWORD instead of size_t
> for a variable which was used for rounding purposes.
You know, this might be only the second 32->64 migration hiccup I've
seen since the dust settled (the other being in gettimeofday or some such).
That's really impressive, given the number of places in the code where a
DWORD (or other 32-bit value) could make things go really wrong...
Ryan
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Cygwin64: allocating too much memory causes a crash (corrected)
2013-10-15 8:18 ` Corinna Vinschen
2013-10-15 13:53 ` Ryan Johnson
@ 2013-10-16 12:12 ` Bengt Larsson
2013-10-16 20:28 ` Bengt Larsson
2 siblings, 0 replies; 6+ messages in thread
From: Bengt Larsson @ 2013-10-16 12:12 UTC (permalink / raw)
To: cygwin
Corinna Vinschen wrote:
>Thanks for the report and especially the testcase! I applied a fix
>and will provide a new developer snapshot with this fix on
>http://cygwin.com/snapshots/ soon.
Thank you Corinna.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Cygwin64: allocating too much memory causes a crash (corrected)
2013-10-15 8:18 ` Corinna Vinschen
2013-10-15 13:53 ` Ryan Johnson
2013-10-16 12:12 ` Bengt Larsson
@ 2013-10-16 20:28 ` Bengt Larsson
2013-10-17 8:39 ` Corinna Vinschen
2 siblings, 1 reply; 6+ messages in thread
From: Bengt Larsson @ 2013-10-16 20:28 UTC (permalink / raw)
To: cygwin
Corinna Vinschen wrote:
>Thanks for the report and especially the testcase! I applied a fix
>and will provide a new developer snapshot with this fix on
>http://cygwin.com/snapshots/ soon.
I tested the snapshot and it works with my testprogram. It also works
with my other program where I detected it.
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Cygwin64: allocating too much memory causes a crash (corrected)
2013-10-16 20:28 ` Bengt Larsson
@ 2013-10-17 8:39 ` Corinna Vinschen
0 siblings, 0 replies; 6+ messages in thread
From: Corinna Vinschen @ 2013-10-17 8:39 UTC (permalink / raw)
To: cygwin
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On Oct 16 22:28, Bengt Larsson wrote:
> Corinna Vinschen wrote:
>
> >Thanks for the report and especially the testcase! I applied a fix
> >and will provide a new developer snapshot with this fix on
> >http://cygwin.com/snapshots/ soon.
>
> I tested the snapshot and it works with my testprogram. It also works
> with my other program where I detected it.
Thanks for your feedback!
Corinna
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Corinna Vinschen Please, send mails regarding Cygwin to
Cygwin Maintainer cygwin AT cygwin DOT com
Red Hat
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^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2013-10-17 8:39 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-09-10 16:09 Cygwin64: allocating too much memory causes a crash (corrected) Bengt Larsson
2013-10-15 8:18 ` Corinna Vinschen
2013-10-15 13:53 ` Ryan Johnson
2013-10-16 12:12 ` Bengt Larsson
2013-10-16 20:28 ` Bengt Larsson
2013-10-17 8:39 ` Corinna Vinschen
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