Xcode Debugger SIGSEGV

Xcode Debugger SIGSEGV

I have condensed this problem to the following sequence of code. When I debug and step line by line through the code using Xcode, I get aSIGSEGV error message ( shown below ) when I step into Test_Function. The program runs without errors if I just run the program or while in debug mode if I select Continue without any break points. I am running Mac OS 10.6.2, Xcode, 3.2.1,and Intel FortranVersion 11.1 Build 20091130Package ID: m_cprof_p_11.1.080. Any ideas?

Update1: Further information from idb:

Program received signal SIGBUS
dyld_stub_binder () in /usr/lib/libSystem.B.dylib

Update2: Information from console has been added to the bottom of this message.

---------- Code ----------

PROGRAM Main

IMPLICIT NONE

C ..

C .. Local Scalars ..

DOUBLE PRECISION results

CHARACTER*4 aString

C ..

C .. External Function ..

DOUBLE PRECISION Test_Function

C ..

C .. Executable Statements ..

aString='abcd'

results = Test_Function(aString)

STOP

END

DOUBLE PRECISION Function Test_Function(aString)

IMPLICIT NONE

C ..

C .. Scalar Arguments ..

CHARACTER*4 aString

C ..

C .. Local Scalars ..

DOUBLE PRECISION var3

C ..

C .. Executable Statements ..

IF (aString.EQ.'abcd') THEN

var3 = 650.0D0

END IF

Test_Function = var3

RETURN

END

-------- Console Error Message ----------

[Session started at 2009-12-31 12:32:41 -0800.]

GNU gdb 6.3.50-20050815 (Apple version gdb-1346) (Fri Sep 18 20:40:51 UTC 2009)

Copyright 2004 Free Software Foundation, Inc.

GDB is free software, covered by the GNU General Public License, and you are

welcome to change it and/or distribute copies of it under certain conditions.

Type "show copying" to see the conditions.

There is absolutely no warranty for GDB. Type "show warranty" for details.

This GDB was configured as "x86_64-apple-darwin".tty /dev/ttys016

sharedlibrary apply-load-rules all

Loading program into debugger

Program loaded.

run

[Switching to process 1332]

Running

Data Formatters temporarily unavailable, will re-try after a 'continue'. (Attempt to take address of value not located in memory.)

Current language: auto; currently fortran

The Debugger has exited due to signal 11 (SIGSEGV).The Debugger has exited due to signal 11 (SIGSEGV).

(gdb)


---------------- Console-----------------

Process: gdb-i386-apple-darwin [1307]

Path: /Developer/usr/libexec/gdb/gdb-i386-apple-darwin

Identifier: gdb-i386-apple-darwin

Version: ??? (???)

Code Type: X86-64 (Native)

Parent Process: Xcode [546]

Date/Time: 2009-12-31 12:31:49.415 -0800

OS Version: Mac OS X 10.6.2 (10C540)

Report Version: 6

Exception Type: EXC_BAD_ACCESS (SIGSEGV)

Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000018

Crashed Thread: 0 gdb main thread Dispatch queue: com.apple.main-thread

Thread 0 Crashed: gdb main thread Dispatch queue: com.apple.main-thread

0 gdb-i386-apple-darwin 0x000000010004129b symbol_natural_name + 4

1 gdb-i386-apple-darwin 0x000000010000e02c print_syms_for_block + 600

2 gdb-i386-apple-darwin 0x000000010000eb00 list_args_or_locals + 411

3 gdb-i386-apple-darwin 0x000000010000ecc1 mi_cmd_stack_list_args + 335

4 gdb-i386-apple-darwin 0x00000001000138c5 captured_mi_execute_command + 367

5 gdb-i386-apple-darwin 0x000000010006e6f9 catch_exception + 57

6 gdb-i386-apple-darwin 0x000000010001140a mi_execute_command + 140

7 gdb-i386-apple-darwin 0x0000000100073357 process_event + 133

8 gdb-i386-apple-darwin 0x000000010007406b gdb_do_one_event + 1049

9 gdb-i386-apple-darwin 0x000000010006e7e0 catch_errors + 70

10 gdb-i386-apple-darwin 0x0000000100073819 start_event_loop + 60

11 gdb-i386-apple-darwin 0x000000010007083c captured_command_loop + 9

12 gdb-i386-apple-darwin 0x000000010006e7e0 catch_errors + 70

13 gdb-i386-apple-darwin 0x0000000100070831 captured_main + 4851

14 gdb-i386-apple-darwin 0x000000010006e7e0 catch_errors + 70

15 gdb-i386-apple-darwin 0x000000010006f537 gdb_main + 43

16 gdb-i386-apple-darwin 0x0000000100000f29 main + 61

17 gdb-i386-apple-darwin 0x0000000100000ee4 start + 52

Thread 1:

0 libSystem.B.dylib 0x00007fff81b1c9da __workq_kernreturn + 10

1 libSystem.B.dylib 0x00007fff81b1cdec _pthread_wqthread + 917

2 libSystem.B.dylib 0x00007fff81b1ca55 start_wqthread + 13

Thread 2: Dispatch queue: com.apple.libdispatch-manager

0 libSystem.B.dylib 0x00007fff81b1bbba kevent + 10

1 libSystem.B.dylib 0x00007fff81b1da85 _dispatch_mgr_invoke + 154

2 libSystem.B.dylib 0x00007fff81b1d75c _dispatch_queue_invoke + 185

3 libSystem.B.dylib 0x00007fff81b1d286 _dispatch_worker_thread2 + 244

4 libSystem.B.dylib 0x00007fff81b1cbb8 _pthread_wqthread + 353

5 libSystem.B.dylib 0x00007fff81b1ca55 start_wqthread + 13

Thread 3:

0 libSystem.B.dylib 0x00007fff81b02e3a mach_msg_trap + 10

1 libSystem.B.dylib 0x00007fff81b034ad mach_msg + 59

2 com.apple.CoreFoundation 0x00007fff88b227a2 __CFRunLoopRun + 1698

3 com.apple.CoreFoundation 0x00007fff88b21c2f CFRunLoopRunSpecific + 575

4 com.apple.DebugSymbols 0x00007fff806974ac SpotlightQueryThread(void*) + 380

5 libSystem.B.dylib 0x00007fff81b3bf8e _pthread_start + 331

6 libSystem.B.dylib 0x00007fff81b3be41 thread_start + 13

Thread 4:

0 libSystem.B.dylib 0x00007fff81b1c9da __workq_kernreturn + 10

1 libSystem.B.dylib 0x00007fff81b1cdec _pthread_wqthread + 917

2 libSystem.B.dylib 0x00007fff81b1ca55 start_wqthread + 13

Thread 5: signal thread

0 libSystem.B.dylib 0x00007fff81b51022 __wait4 + 10

1 gdb-i386-apple-darwin 0x000000010015ef08 macosx_signal_thread + 189

2 libSystem.B.dylib 0x00007fff81b3bf8e _pthread_start + 331

3 libSystem.B.dylib 0x00007fff81b3be41 thread_start + 13

Thread 6: exception thread

0 libSystem.B.dylib 0x00007fff81b0d426 read + 10

1 gdb-i386-apple-darwin 0x000000010015fc31 macosx_exception_thread + 1200

2 libSystem.B.dylib 0x00007fff81b3bf8e _pthread_start + 331

3 libSystem.B.dylib 0x00007fff81b3be41 thread_start + 13

Thread 0 crashed with X86 Thread State (64-bit):

rax: 0x0000000000000000 rbx: 0x0000000000000014 rcx: 0x0000000000000000 rdx: 0x00007fff70455560

rdi: 0x0000000000000000 rsi: 0x0000000000000001 rbp: 0x00007fff5fbff110 rsp: 0x00007fff5fbff110

r8: 0x00007fff5fbff0d0 r9: 0x0000000000000000 r10: 0x00000001015051e0 r11: 0x0000000100055230

r12: 0x00000001019e10a0 r13: 0x0000000000000000 r14: 0x00000001015064b0 r15: 0x0000000000000000

rip: 0x000000010004129b rfl: 0x0000000000010246 cr2: 0x0000000000000018

Binary Images:

0x100000000 - 0x1002a8fe7 +gdb-i386-apple-darwin ??? (???) <29E83524-92E9-6D66-329F-63BDA31D8644> /Developer/usr/libexec/gdb/gdb-i386-apple-darwin

0x7fff5fc00000 - 0x7fff5fc3bdef dyld 132.1 (???) /usr/lib/dyld

0x7fff8022c000 - 0x7fff802e2fff libobjc.A.dylib ??? (???) /usr/lib/libobjc.A.dylib

0x7fff80333000 - 0x7fff80349fef libbsm.0.dylib ??? (???) <42D3023A-A1F7-4121-6417-FCC6B51B3E90> /usr/lib/libbsm.0.dylib

0x7fff80692000 - 0x7fff806d0fef com.apple.DebugSymbols 1.1 (70) /System/Library/PrivateFrameworks/DebugSymbols.framework/Versions/A/DebugSymbols

0x7fff813bc000 - 0x7fff813bcff7 com.apple.CoreServices 44 (44) <210A4C56-BECB-E3E4-B6EE-7EC53E02265D> /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices

0x7fff81748000 - 0x7fff81783ff7 com.apple.AE 496.1 (496.1) <27D2D2E9-B309-7E65-8C3F-7FF01148F0DE> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/AE.framework/Versions/A/AE

0x7fff81b02000 - 0x7fff81cc0ff7 libSystem.B.dylib ??? (???) <526DD3E5-2A8B-4512-ED97-01B832369959> /usr/lib/libSystem.B.dylib

0x7fff81d8e000 - 0x7fff820c0fef com.apple.CoreServices.CarbonCore 861.2 (861.2) <39F3B259-AC2A-792B-ECFE-4F3E72F2D1A5> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CarbonCore.framework/Versions/A/CarbonCore

0x7fff82380000 - 0x7fff823ddfef com.apple.framework.IOKit 2.0 (???) /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit

0x7fff823de000 - 0x7fff82497fff libsqlite3.dylib ??? (???) <5A15E12A-AE8F-1A36-BBC7-564E7D7AD0FB> /usr/lib/libsqlite3.dylib

0x7fff82498000 - 0x7fff82528fff com.apple.SearchKit 1.3.0 (1.3.0) <4175DC31-1506-228A-08FD-C704AC9DF642> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/SearchKit.framework/Versions/A/SearchKit

0x7fff825d6000 - 0x7fff825e5fff com.apple.NetFS 3.2.1 (3.2.1) /System/Library/Frameworks/NetFS.framework/Versions/A/NetFS

0x7fff826fe000 - 0x7fff82729ff7 libxslt.1.dylib ??? (???) <87A0B228-B24A-C426-C3FB-B40D7258DD49> /usr/lib/libxslt.1.dylib

0x7fff82acb000 - 0x7fff82ad1ff7 com.apple.DiskArbitration 2.3 (2.3) <857F6E43-1EF4-7D53-351B-10DE0A8F992A> /System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration

0x7fff82ae8000 - 0x7fff82b32ff7 com.apple.Metadata 10.6.2 (507.4) /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/Metadata.framework/Versions/A/Metadata

0x7fff82f2c000 - 0x7fff831b1ff7 com.apple.security 6.0 (36910) <67DF686D-B991-D0D6-20B6-9EA668018466> /System/Library/Frameworks/Security.framework/Versions/A/Security

0x7fff83ddc000 - 0x7fff83e98ff7 com.apple.CoreServices.OSServices 352 (352) /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/OSServices.framework/Versions/A/OSServices

0x7fff84182000 - 0x7fff841fffef libstdc++.6.dylib ??? (???) <35ECA411-2C08-FD7D-11B1-1B7A04921A5C> /usr/lib/libstdc++.6.dylib

0x7fff84348000 - 0x7fff84356ff7 libkxld.dylib ??? (???) <568C35E7-B101-3F1E-0361-3E1E9F15C90B> /usr/lib/system/libkxld.dylib

0x7fff84de5000 - 0x7fff84fa3fff libicucore.A.dylib ??? (???) <5BD16988-545F-6A8C-9A6F-FB18ACDCAEC2> /usr/lib/libicucore.A.dylib

0x7fff85067000 - 0x7fff850b3fff libauto.dylib ??? (???) <072804DF-36AD-2DBE-7EF8-639CFB79077F> /usr/lib/libauto.dylib

0x7fff850ef000 - 0x7fff85117fff com.apple.DictionaryServices 1.1.1 (1.1.1) <9FD709FC-23F0-F270-EAC1-C590CD516A36> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/DictionaryServices.framework/Versions/A/DictionaryServices

0x7fff85ac4000 - 0x7fff85ad5fef libz.1.dylib ??? (???) <3A7A4C48-A4C8-A78A-8B87-C0DDF6601AC8> /usr/lib/libz.1.dylib

0x7fff85b09000 - 0x7fff85ba9fff com.apple.LaunchServices 362 (362) /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/LaunchServices.framework/Versions/A/LaunchServices

0x7fff8613a000 - 0x7fff86251fef libxml2.2.dylib ??? (???) /usr/lib/libxml2.2.dylib

0x7fff865b9000 - 0x7fff86685fff com.apple.CFNetwork 454.5 (454.5) <319C7138-2839-DA5E-413A-618248BD4A32> /System/Library/Frameworks/CoreServices.framework/Versions/A/Frameworks/CFNetwork.framework/Versions/A/CFNetwork

0x7fff8676c000 - 0x7fff86770ff7 libmathCommon.A.dylib ??? (???) <95718673-FEEE-B6ED-B127-BCDBDB60D4E5> /usr/lib/system/libmathCommon.A.dylib

0x7fff86db6000 - 0x7fff86df7ff7 com.apple.SystemConfiguration 1.10.1 (1.10.1) /System/Library/Frameworks/SystemConfiguration.framework/Versions/A/SystemConfiguration

0x7fff8793c000 - 0x7fff87a34fe7 libiconv.2.dylib ??? (???) /usr/lib/libiconv.2.dylib

0x7fff880d4000 - 0x7fff88113fef libncurses.5.4.dylib ??? (???) /usr/lib/libncurses.5.4.dylib

0x7fff88ad7000 - 0x7fff88c4aff7 com.apple.CoreFoundation 6.6.1 (550.13) <1E952BD9-37C6-16BE-B2F0-CD92A6283D37> /System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation

0x7fffffe00000 - 0x7fffffe01fff libSystem.B.dylib ??? (???) <526DD3E5-2A8B-4512-ED97-01B832369959> /usr/lib/libSystem.B.dylib

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