Yes you can do this with LLDB. If you load a binary and dump its symbol table,
you will see the information you want. For symbols that are lazily bound, you
can look for "Trampoline" symbols:
cd lldb/test/lang/objc/foundation
make
lldb a.out
(lldb) target modules dump symtab a.out
Symtab, file = .../lldb/test/lang/objc/foundation/a.out, num_symbols = 54:
Debug symbol
|Synthetic symbol
||Externally Visible
|||
Index UserID DSX Type File Address/Value Load Address Size
Flags Name
------- ------ --- ------------ ------------------ ------------------
------------------ ---------- ----------------------------------
[ 0] 0 D SourceFile 0x0000000000000000 Sibling
-> [ 15] 0x00640000
/Volumes/work/gclayton/Documents/src/lldb/test/lang/objc/foundation/main.m
[ 1] 2 D ObjectFile 0x000000004f79f1ca
0x0000000000000000 0x00660001
/Volumes/work/gclayton/Documents/src/lldb/test/lang/objc/foundation/main.o
[ 2] 4 D Code 0x00000001000010f0
0x00000000000000c0 0x000e0000 -[MyString initWithNSString:]
[ 3] 8 D Code 0x00000001000011b0
0x0000000000000090 0x000e0000 -[MyString dealloc]
[ 4] 12 D Code 0x0000000100001240
0x00000000000000a0 0x000e0000 -[MyString description]
[ 5] 16 D Code 0x00000001000012e0
0x0000000000000020 0x000e0000 -[MyString descriptionPauses]
[ 6] 20 D Code 0x0000000100001300
0x0000000000000030 0x000e0000 -[MyString setDescriptionPauses:]
[ 7] 24 D Code 0x0000000100001330
0x0000000000000030 0x000e0000 -[MyString str_property]
[ 8] 28 D Code 0x0000000100001360
0x0000000000000050 0x000e0000 -[MyString setStr_property:]
[ 9] 32 D Code 0x00000001000013b0
0x0000000000000040 0x000f0000 Test_Selector
[ 10] 36 D Code 0x00000001000013f0
0x0000000000000130 0x000f0000 Test_NSString
[ 11] 40 D Code 0x0000000100001520
0x0000000000000120 0x000f0000 Test_MyString
[ 12] 44 D Code 0x0000000100001640
0x00000000000001b0 0x000f0000 Test_NSArray
[ 13] 48 D Code 0x00000001000017f0
0x00000000000000e1 0x000f0000 main
[ 14] 56 D X Data 0x0000000100002680
0x0000000000000000 0x00200000 my_global_str
[ 15] 58 D SourceFile 0x0000000000000000 Sibling
-> [ 19] 0x00640000
/Volumes/work/gclayton/Documents/src/lldb/test/lang/objc/foundation/my-base.m
[ 16] 60 D ObjectFile 0x000000004f79f1ca
0x0000000000000000 0x00660001
/Volumes/work/gclayton/Documents/src/lldb/test/lang/objc/foundation/my-base.o
[ 17] 62 D Code 0x00000001000018e0
0x0000000000000020 0x000e0000 -[MyBase propertyMovesThings]
[ 18] 66 D Code 0x0000000100001900
0x000000000000001f 0x000e0000 -[MyBase setPropertyMovesThings:]
[ 19] 82 Data 0x0000000100002000
0x0000000000000460 0x000e0000 pvars
[ 20] 83 ObjCIVar 0x0000000100002518
0x0000000000000148 0x001e0000 MyBase.propertyMovesThings
[ 21] 84 X Data 0x0000000100002660
0x0000000000000008 0x000f0000 NXArgc
[ 22] 85 X Data 0x0000000100002668
0x0000000000000008 0x000f0000 NXArgv
[ 23] 86 X ObjCClass 0x00000001000024d8
0x0000000000000028 0x000f0000 MyBase
[ 24] 87 X ObjCClass 0x0000000100002460
0x0000000000000028 0x000f0000 MyString
[ 25] 88 X ObjCIVar 0x0000000100002510
0x0000000000000008 0x000f0000 MyString._desc_pauses
[ 26] 89 X ObjCIVar 0x0000000100002508
0x0000000000000008 0x000f0000 MyString.date
[ 27] 90 X ObjCIVar 0x0000000100002500
0x0000000000000008 0x000f0000 MyString.str
[ 28] 91 X ObjCMetaClass 0x00000001000024b0
0x0000000000000028 0x000f0000 MyBase
[ 29] 92 X ObjCMetaClass 0x0000000100002488
0x0000000000000028 0x000f0000 MyString
[ 30] 97 X Data 0x0000000100002678
0x0000000000000008 0x000f0000 __progname
[ 31] 98 X Data 0x0000000100000000
0x00000000000010b0 0x000f0010 _mh_execute_header
[ 32] 99 X Data 0x0000000100002670
0x0000000000000008 0x000f0000 environ
[ 33] 101 X Data 0x0000000100002680
0x0000000000000000 0x000f0000 my_global_str
[ 34] 102 X Code 0x00000001000010b0
0x0000000000000040 0x000f0000 start
[ 35] 103 Trampoline 0x0000000100001938
0x0000000000000006 0x00010200 NSLog
[ 36] 104 X Undefined 0x0000000000000000
0x0000000000000000 0x00010400 OBJC_CLASS_$_NSArray
[ 37] 105 X Undefined 0x0000000000000000
0x0000000000000000 0x00010200 OBJC_CLASS_$_NSAutoreleasePool
[ 38] 106 X Undefined 0x0000000000000000
0x0000000000000000 0x00010400 OBJC_CLASS_$_NSDate
[ 39] 107 X Undefined 0x0000000000000000
0x0000000000000000 0x00010400 OBJC_CLASS_$_NSObject
[ 40] 108 X Undefined 0x0000000000000000
0x0000000000000000 0x00010200 OBJC_CLASS_$_NSString
[ 41] 109 X Undefined 0x0000000000000000
0x0000000000000000 0x00010400 OBJC_METACLASS_$_NSObject
[ 42] 110 X Undefined 0x0000000000000000
0x0000000000000000 0x00010400 __CFConstantStringClassReference
[ 43] 111 X Undefined 0x0000000000000000
0x0000000000000000 0x00010100 _objc_empty_cache
[ 44] 112 X Undefined 0x0000000000000000
0x0000000000000000 0x00010100 _objc_empty_vtable
[ 45] 113 Trampoline 0x000000010000193e
0x0000000000000006 0x00010300 exit
[ 46] 114 Trampoline 0x0000000100001920
0x0000000000000006 0x00010100 objc_getProperty
[ 47] 115 Trampoline 0x0000000100001926
0x0000000000000006 0x00010100 objc_msgSend
[ 48] 116 Trampoline 0x000000010000192c
0x0000000000000006 0x00010100 objc_msgSendSuper2
[ 49] 117 X Undefined 0x0000000000000000
0x0000000000000000 0x00010100 objc_msgSend_fixup
[ 50] 118 Trampoline 0x0000000100001932
0x0000000000000006 0x00010100 objc_setProperty
[ 51] 119 Trampoline 0x0000000100001944
0x0000000000000006 0x00010300 printf
[ 52] 120 Trampoline 0x000000010000194a
0x0000000000000006 0x00010300 usleep
[ 53] 121 X Undefined 0x0000000000000000
0x0000000000000000 0x00010300 dyld_stub_binder
(lldb)
All lazily bound symbols will have type Trampoline:
[ 45] 113 Trampoline 0x000000010000193e
0x0000000000000006 0x00010300 exit
[ 46] 114 Trampoline 0x0000000100001920
0x0000000000000006 0x00010100 objc_getProperty
[ 47] 115 Trampoline 0x0000000100001926
0x0000000000000006 0x00010100 objc_msgSend
[ 48] 116 Trampoline 0x000000010000192c
0x0000000000000006 0x00010100 objc_msgSendSuper2
[ 50] 118 Trampoline 0x0000000100001932
0x0000000000000006 0x00010100 objc_setProperty
[ 51] 119 Trampoline 0x0000000100001944
0x0000000000000006 0x00010300 printf
[ 52] 120 Trampoline 0x000000010000194a
0x0000000000000006 0x00010300 usleep
The other symbols that are exernal are marked with an "X" (which is a boolean
flag on each symbol).
The symbols can be accessed via the SBModule:
size_t
SBModule::GetNumSymbols ();
lldb::SBSymbol
SBModule::GetSymbolAtIndex (size_t idx);
And then you can get the symbol type from each SBSymbol:
SymbolType
SBSymbol::GetType ();
I just added the ability to see if a symbol is externally visible:
% svn commit
Sending include/lldb/API/SBSymbol.h
Sending scripts/Python/interface/SBSymbol.i
Sending source/API/SBSymbol.cpp
Transmitting file data ...
Committed revision 153893.
bool
SBSymbol::IsExternal();
So your flow should be:
SBDebugger::Initialize();
SBDebugger debugger(SBDebugger::Create());
SBTarget target (debugger.CreateTarget (const char *filename,
const char *target_triple,
const char *platform_name,
bool add_dependent_modules,
lldb::SBError& error));
SBFileSpec exe_file_spec (filename);
SBModule exe_module (target.FindModule(exe_file_spec));
if (exe_module.IsValid()
{
const size_t num_symbols = exe_module. GetNumSymbols();
for (size_t i=0; i<num_symbols; ++i)
{
SBSymbol symbol (exe_module. GetSymbolAtIndex(i));
if (symbol.IsExternal())
{
}
if (symbol.GetType() == lldb::eSymbolTypeTrampoline)
{
}
}
}
On Mar 31, 2012, at 11:02 PM, Jason E. Aten wrote:
> Dear LLDB enthusiasts,
>
> I'm wondering if I can use the lldb library/libraries to replace the certain
> code running on OSX that now returns two lists of symbols-- similar to the
> output of (dyldinfo -lazy_bind -exports <bundlefile>); i.e. I need to list
> the symbols imported and exported by a binary shared object or bundle.
>
> My hope was that by using an lldb library, I would be able to use the same
> client code on OSX as on linux. (The linux version of the code currently uses
> libbfd and libdld to do the same thing, but the later is getting little
> love/maintenance).
>
> I'm looking through include/lldb/, as it seems like lldb would need this same
> info (imported symbol list, and exported symbol list for a Mach-O file) to
> function, but it's not clear which API to use. All suggestions/pointers to
> example code in lldb would be welcome!
>
> Thank you.
> Jason
>
> # In case it is unclear what dyldinfo does, here is an example: (but I only
> need the symbol names; not the addresses or segments or sections):
>
> $ file /tmp/sample_bundle
> /tmp/sample_bundle: Mach-O 64-bit bundle x86_64
>
> $dyldinfo -lazy_bind -export /tmp/sample_bundle
>
> lazy binding information (from lazy_bind part of dyld info):
> segment section address index dylib symbol
> __DATA __la_symbol_ptr 0x00001030 0x0000 flat-namespace __mm_pop_chunk
> __DATA __la_symbol_ptr 0x00001038 0x0015 flat-namespace _dh_define
> export information (from trie):
> 0x000008A0 _C_ipair
> 0x00000920 _init_ipair
> 0x00000BC0 _C_iprot
> 0x00000C40 _C_ipi2
> 0x00000CC0 _C_ipi1
> 0x00001040 _K_ipair_R43808f40
> 0x00001160 _K_ipi1_R5cb4475d
> 0x00001260 _K_ipi2_R5cb4475d
> 0x00001360 _K_iprot_Rfc8fe739
> 0x00001460 _majver_ipair
> 0x00001464 _minver_ipair
>
>
> _______________________________________________
> lldb-dev mailing list
> [email protected]
> http://lists.cs.uiuc.edu/mailman/listinfo/lldb-dev
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