Hi all,
I have some code that is written and compiled in Visual Studio 2008. This is a
console application. When running under mono on Linux, with the same input, 1
out of 5 times or so I get a segmentation fault. I’m not sure what’s
generating this, so I looked at the instructions online for debugging mono
which led me to these questions.
1. Can gdb / mono_mip view debugging symbols within C# if the code was
compiled with VS and not with mcs? Currently the code won’t compile with mcs
due to unknown values in the project/solution files and possibly because one of
the projects in the solution is a c++ project (although it seems to handle the
dll ok).
2. Does this gdb backtrace mean anything to anyone:
(gdb) mono_backtrace 15
You can't do that without a process to debug.
(gdb) backtrace
#0 0x0000000001cb6940 in ?? ()
#1 0x0000000000628e62 in monoeg_g_hash_table_lookup_extended (hash=0x9d0690,
key=
0x587130 <mono_thread_get_undeniable_exception>, orig_key=0x7fffd82fff68,
value=0x7fffd82fff60)
at ghashtable.c:328
#2 0x0000000000628ddd in monoeg_g_hash_table_lookup (hash=0x9d0690, key=
0x587130 <mono_thread_get_undeniable_exception>) at ghashtable.c:311
#3 0x000000000053fa27 in mono_find_jit_icall_by_addr (addr=
0x587130 <mono_thread_get_undeniable_exception>) at icall.c:7694
#4 0x00000000004311d2 in mono_emit_jit_icall (cfg=0x1be03d0, func=<optimized
out>, args=0x0)
at method-to-ir.c:2918
#5 0x000000000043e390 in mono_method_to_ir (cfg=cfg@entry=0x1be03d0,
method=method@entry=
<error reading variable: Address 0x7fffd786afe8 out of bounds>,
start_bblock=<optimized out>,
start_bblock@entry=0x0, end_bblock=<optimized out>, end_bblock@entry=0x0,
return_var=return_var@entry=
0x0, inline_args=inline_args@entry=0x0, inline_offset=0, is_virtual_call=0)
at method-to-ir.c:11941
#6 0x00000000005032f9 in mini_method_compile (method=method@entry=
<error reading variable: Address 0x7fffd786afe8 out of bounds>,
opts=opts@entry=370239999,
domain=domain@entry=0x9b80a0, flags=flags@entry=JIT_FLAG_RUN_CCTORS,
parts=parts@entry=0,
aot_method_index=aot_method_index@entry=-1) at mini.c:3467
#7 0x0000000000504625 in mono_jit_compile_method_inner (method=method@entry=
<error reading variable: Address 0x7fffd786afe8 out of bounds>,
target_domain=target_domain@entry=
0x9b80a0, opt=opt@entry=370239999, jit_ex=jit_ex@entry=0x7fffd83006d8) at
mini.c:4063
#8 0x00000000004274fc in mono_jit_compile_method_with_opt (method=method@entry=
<error reading variable: Address 0x7fffd786afe8 out of bounds>,
opt=370239999, ex=ex@entry=
0x7fffd83006d8) at mini-runtime.c:1904
#9 0x0000000000427a4b in mono_jit_compile_method (method=
<error reading variable: Address 0x7fffd786afe8 out of bounds>) at
mini-runtime.c:1941
#10 0x00000000004a3483 in common_call_trampoline_inner (regs=0x7fffd83008a8,
code=0x402528e4 "\270\001", m=
<error reading variable: Address 0x7fffd786afe8 out of bounds>, vt=0x0,
vtable_slot=<optimized out>)
at mini-trampolines.c:570
#11 0x000000004000217d in ?? ()
#12 0x0000000000000001 in ?? ()
#13 0x0000000000a11585 in ?? ()
#14 0x00000000402528e4 in ?? ()
#15 0x0000000000a11585 in ?? ()
#16 0x00007fffd83009e0 in ?? ()
#17 0x00007fffd83008a8 in ?? ()
#18 0x00007fffd8301698 in ?? ()
#19 0x00007fffd833ade0 in ?? ()
#20 0x00007fffd833adf8 in ?? ()
#21 0x0000000000000000 in ?? ()
This doesn’t seem to be in the GC. Where would I go next?
— — —
Glover E. George
Computer Scientist
Information Technology Laboratory
US Army Engineer Research and Development Center
Vicksburg, MS 39180
601-634-4730
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