Hello,

now that the Lazarus snapshots are including FPC 2.2.1 for OS X (i386), I am using this version. I had to add the -Cg- option because my old assembly code is not compatible with PIC.

Unfortunately the debugger crashes with the following crash report. Is there anything I can do to make it work? I am compiling a medium-sized application with LCL and the Carbon widgetset.

Thanks
Tobias

-------------------

Date/Time: 2008-05-31 11:27:52.612 +0200
OS Version: 10.4.11 (Build 8S2167)
Report Version: 4

Command: gdb-i386-apple-darwin
Path: /usr/libexec/gdb/gdb-i386-apple-darwin
Parent: lazarus [6600]

Version: ??? (???)

PID: 7572
Thread: 0

Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_INVALID_ADDRESS (0x0001) at 0x4d7f9dd4

Thread 0 Crashed:
0 gdb-i386-apple-darwin 0x0019f5ec d_substitution + 151 1 gdb-i386-apple-darwin 0x001a2ddd cplus_demangle_type + 885 2 gdb-i386-apple-darwin 0x001a2ec1 cplus_demangle_type + 1113 3 gdb-i386-apple-darwin 0x001a2f2e d_bare_function_type + 61 4 gdb-i386-apple-darwin 0x001a2ca4 cplus_demangle_type + 572 5 gdb-i386-apple-darwin 0x001a2f2e d_bare_function_type + 61 6 gdb-i386-apple-darwin 0x001a38ac d_encoding + 1007 7 gdb-i386-apple-darwin 0x001a3b1a d_demangle + 532 8 gdb-i386-apple-darwin 0x001a3c86 cplus_demangle_v3 + 20 9 gdb-i386-apple-darwin 0x000de332 cplus_demangle + 128 10 gdb-i386-apple-darwin 0x0002fa60 symbol_find_demangled_name + 99 11 gdb-i386-apple-darwin 0x0002fcca symbol_set_names + 567 12 gdb-i386-apple-darwin 0x000b0c61 prim_record_minimal_symbol_and_info + 395 13 gdb-i386-apple-darwin 0x0015284b record_minimal_symbol + 1209 14 gdb-i386-apple-darwin 0x001574bb read_dbx_symtab + 1358 15 gdb-i386-apple-darwin 0x0015a023 dbx_symfile_read + 593 16 gdb-i386-apple-darwin 0x00166c7a macho_build_psymtabs + 2601 17 gdb-i386-apple-darwin 0x00166dd5 macho_symfile_read + 263 18 gdb-i386-apple-darwin 0x0008d570 syms_from_objfile + 1282 19 gdb-i386-apple-darwin 0x000912af symbol_file_add_with_addrs_or_offsets + 647 20 gdb-i386-apple-darwin 0x00091a06 symbol_file_add_main_1 + 233 21 gdb-i386-apple-darwin 0x00091b27 symbol_file_command + 216 22 gdb-i386-apple-darwin 0x0009fce3 file_command + 44 23 gdb-i386-apple-darwin 0x00022bbd execute_command + 702 24 gdb-i386-apple-darwin 0x00015ff0 mi_execute_cli_command + 144 25 gdb-i386-apple-darwin 0x00017003 captured_mi_execute_command + 371 26 gdb-i386-apple-darwin 0x0003d661 catch_exception + 65 27 gdb-i386-apple-darwin 0x000163d8 mi_execute_command + 157 28 gdb-i386-apple-darwin 0x0001657f mi_execute_command_wrapper + 47 29 gdb-i386-apple-darwin 0x00040962 handle_file_event + 344 30 gdb-i386-apple-darwin 0x00040361 process_event + 132 31 gdb-i386-apple-darwin 0x0004123e gdb_do_one_event + 1159 32 gdb-i386-apple-darwin 0x0003d87f catch_errors + 76 33 gdb-i386-apple-darwin 0x000403bf start_event_loop + 81 34 gdb-i386-apple-darwin 0x00017abd captured_command_loop + 17 35 gdb-i386-apple-darwin 0x0003d87f catch_errors + 76 36 gdb-i386-apple-darwin 0x00018ddb captured_main + 4835 37 gdb-i386-apple-darwin 0x0003d87f catch_errors + 76 38 gdb-i386-apple-darwin 0x00018e1b gdb_main + 62 39 gdb-i386-apple-darwin 0x000024b9 main + 51
40 gdb-i386-apple-darwin 0x0000246a _start + 216 41 gdb-i386-apple-darwin 0x00002391 start + 41

I don't think the crash has anything to do with PIC vs no PIC, as it happens during the symbol reading. I don't know what does cause it though, and I've never heard of or seen this before. Did you rebuild all of your units using the new compiler?

Also, you could try using dwarf (-gw) instead of stabs (-g) debug information, as stabs is deprecated by Apple on Mac OS X. The downside is that some things don't still completely work with dwarf (e.g. shortstrings are truncated at 8 characters).

Another thing you could try is using a different version of gdb (if you're using the one from Xcode 2.5, try the one from Xcode 3.0 and vice versa; or download the iPhone SDK beta and use the gdb included there).

Jonas