Question

如何使用内联框架解析DEBUG_STACK_FRAME_EX的符号？

我知道DEBUG_STACK_FRAME_EX及其ULONG InlineFrameContext，但我不明白如何将InlineFrameContext解析为相应的符号。

FrameSignature中的FrameId和INLINE_FRAME_CONTEXT是什么？

Answer 1

InLineFrameContext只是一个联合FrameType已定义，这是ContextValue DWORD

中的第二个字节

对于内联框架，这通常是25ed0200（在大多数情况下我注意到虽然在某些系统dll的内嵌框架中它也可能是b5b80200

输出与kvf and .inline 1 (.inline enable )

相同

如果禁用内联
InlineFrameContext would be 0xffffffff

其中ff is STACK_FRAME_TYPE_IGNORE

25ed / b5b8，ffff等帧签名和00帧ID 从符号中提取

（如果你真的想知道调查加载符号并从pdb中获取此签名的dia sdk com sorcery（dbghelp！g + 0xxxx（win10 dbghelp.dll中的2360））

无论它们是什么，它们似乎对符号的任何相关性都没有用，并且签名在每次调用或windbg会话时都有所不同和每个.reload / f上的iirc

即使OutputContextStackTraceEx函数似乎也没有使用签名和Id（如果类型为02，则类型用于表示内联）

如果您想进行实验，可以检查此代码（它是一个engextcpp扩展，以便您编译并在windbg中加载它并运行命令它将与您issued kvf

一样打印堆栈以及一些喷出

#include <codeanalysis\warnings.h>
#pragma warning( push )
#pragma warning ( disable : ALL_CODE_ANALYSIS_WARNINGS )
#include <engextcpp.cpp>
#pragma warning( pop )
class EXT_CLASS : public ExtExtension {
public:
    EXT_COMMAND_METHOD(gcsex);
};
EXT_DECLARE_GLOBALS();
ULONG64 InstructionOffset; DEBUG_STACK_FRAME ScopeFrame; CONTEXT ScopeContext; 
DEBUG_STACK_FRAME_EX FrameEx[0x20];CONTEXT FrameContext[0x20];ULONG FramesFilled; 
INLINE_FRAME_CONTEXT Inlineframectx;
EXT_COMMAND( gcsex, "", "" ) {
    InstructionOffset = NULL; FramesFilled = NULL;
    memset(&ScopeFrame,0,sizeof(ScopeFrame));memset(&ScopeContext,0,sizeof(ScopeContext));
    memset(&FrameEx, 0, sizeof(FrameEx)); memset(&FrameContext,0,sizeof(FrameContext));
    memset(&Inlineframectx,0,sizeof(Inlineframectx));
    m_Symbols->GetScope(&InstructionOffset,&ScopeFrame,&ScopeContext,sizeof(ScopeContext));
    Out("%I64X%I64x %X\n",InstructionOffset,ScopeFrame.InstructionOffset,ScopeContext.Eip);
    m_Control5->GetContextStackTraceEx( &ScopeContext,sizeof(ScopeContext),
    FrameEx,0x20,FrameContext,0x20*sizeof(CONTEXT),sizeof(CONTEXT),&FramesFilled );
    Out("Frames Filled = %x\n" , FramesFilled);
    for(ULONG i = 0 ; i < FramesFilled; i++) {
        Inlineframectx.ContextValue = FrameEx[i].InlineFrameContext;
        Out("Inline Frame Context for frame %d=%x\n" , i , FrameEx[i].InlineFrameContext);
        Out("Frameid = %x FrameType = %x Frame Signature = %x\n" ,
        Inlineframectx.FrameId , Inlineframectx.FrameType , Inlineframectx.FrameSignature);
    }
    m_Control5->OutputContextStackTraceEx ( DEBUG_OUTCTL_ALL_CLIENTS,FrameEx,FramesFilled,
    &FrameContext,FramesFilled*sizeof(CONTEXT),sizeof(CONTEXT),0x1fff );
}

你应该在执行扩展

时看到这样的事情

0:000> kb
 # ChildEBP RetAddr  Args to Child              
00 (Inline) -------- -------- -------- -------- runasm!helper [e:\test\runasm\runasm.cpp @ 4]
01 0029fd44 0124159a 00000001 0008c5f0 00091a70 runasm!main+0x20 [e:\test\runasm\runasm.cpp @ 32]
02 (Inline) -------- -------- -------- -------- runasm!invoke_main+0x1d [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl @ 74]
03 0029fd90 75d53c45 7ffdf000 0029fddc 778037f5 runasm!__scrt_common_main_seh+0xff [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl @ 264]
04 0029fd9c 778037f5 7ffdf000 75826e8f 00000000 kernel32!BaseThreadInitThunk+0xe
05 0029fddc 778037c8 01241652 7ffdf000 00000000 ntdll!__RtlUserThreadStart+0x70
06 0029fdf4 00000000 01241652 7ffdf000 00000000 ntdll!_RtlUserThreadStart+0x1b
0:000> !gcsex
12412F0 12412f0 12412F0
Frames Filled = 7
Inline Frame Context = for frame 0 = 25ed0200
Frameid = 0 FrameType = 2 Frame Signature = 25ed
Inline Frame Context = for frame 1 = 25ed0100
Frameid = 0 FrameType = 1 Frame Signature = 25ed
Inline Frame Context = for frame 2 = 25ed8200
Frameid = 0 FrameType = 82 Frame Signature = 25ed
Inline Frame Context = for frame 3 = 25ed8100
Frameid = 0 FrameType = 81 Frame Signature = 25ed
Inline Frame Context = for frame 4 = 25ed8100
Frameid = 0 FrameType = 81 Frame Signature = 25ed
Inline Frame Context = for frame 5 = 25ed8100
Frameid = 0 FrameType = 81 Frame Signature = 25ed
Inline Frame Context = for frame 6 = 25ed8100
Frameid = 0 FrameType = 81 Frame Signature = 25ed
 #   Memory  ChildEBP RetAddr  Args to Child              
00           (Inline) -------- -------- -------- -------- runasm!helper (Inline Function @ 012412f0) (CONV: cdecl) [e:\test\runasm\runasm.cpp @ 4]
01           0029fd44 0124159a 00000001 0008c5f0 00091a70 runasm!main(void)+0x20 (FPO: [0,1,4]) (CONV: cdecl) [e:\test\runasm\runasm.cpp @ 32]
02        4c (Inline) -------- -------- -------- -------- runasm!invoke_main+0x1d (Inline Function @ 0124159a) (CONV: cdecl) [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl @ 74]
03         0 0029fd90 75d53c45 7ffdf000 0029fddc 778037f5 runasm!__scrt_common_main_seh(void)+0xff (FPO: [Non-Fpo]) (CONV: cdecl) [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl @ 264]
04         c 0029fd9c 778037f5 7ffdf000 75826e8f 00000000 kernel32!BaseThreadInitThunk+0xe (FPO: [Non-Fpo])
05        40 0029fddc 778037c8 01241652 7ffdf000 00000000 ntdll!__RtlUserThreadStart+0x70 (FPO: [Non-Fpo])
06        18 0029fdf4 00000000 01241652 7ffdf000 00000000 ntdll!_RtlUserThreadStart+0x1b (FPO: [Non-Fpo])
0:000> .inline 
Include inline function queries is "enabled".
0:000> .inline 0
Include inline function queries is "disabled".
0:000> kb
 # ChildEBP RetAddr  Args to Child              
00 0029fd44 0124159a 00000001 0008c5f0 00091a70 runasm!main+0x20 [e:\test\runasm\runasm.cpp @ 32]
01 0029fd90 75d53c45 7ffdf000 0029fddc 778037f5 runasm!__scrt_common_main_seh+0xff [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl @ 264]
02 0029fd9c 778037f5 7ffdf000 75826e8f 00000000 kernel32!BaseThreadInitThunk+0xe
03 0029fddc 778037c8 01241652 7ffdf000 00000000 ntdll!__RtlUserThreadStart+0x70
04 0029fdf4 00000000 01241652 7ffdf000 00000000 ntdll!_RtlUserThreadStart+0x1b
0:000> !gcsex
12412F0 12412f0 12412F0
Frames Filled = 5
Inline Frame Context = for frame 0 = ffffffff
Frameid = ff FrameType = ff Frame Signature = ffff
Inline Frame Context = for frame 1 = ffffffff
Frameid = ff FrameType = ff Frame Signature = ffff
Inline Frame Context = for frame 2 = ffffffff
Frameid = ff FrameType = ff Frame Signature = ffff
Inline Frame Context = for frame 3 = ffffffff
Frameid = ff FrameType = ff Frame Signature = ffff
Inline Frame Context = for frame 4 = ffffffff
Frameid = ff FrameType = ff Frame Signature = ffff
 #   Memory  ChildEBP RetAddr  Args to Child              
00           0029fd44 0124159a 00000001 0008c5f0 00091a70 runasm!main(void)+0x20 (FPO: [0,1,4]) (CONV: cdecl) [e:\test\runasm\runasm.cpp @ 32]
01        4c 0029fd90 75d53c45 7ffdf000 0029fddc 778037f5 runasm!__scrt_common_main_seh(void)+0xff (FPO: [Non-Fpo]) (CONV: cdecl) [f:\dd\vctools\crt\vcstartup\src\startup\exe_common.inl @ 264]
02         c 0029fd9c 778037f5 7ffdf000 75826e8f 00000000 kernel32!BaseThreadInitThunk+0xe (FPO: [Non-Fpo])
03        40 0029fddc 778037c8 01241652 7ffdf000 00000000 ntdll!__RtlUserThreadStart+0x70 (FPO: [Non-Fpo])
04        18 0029fdf4 00000000 01241652 7ffdf000 00000000 ntdll!_RtlUserThreadStart+0x1b (FPO: [Non-Fpo])

结果证实了签名因会话而异的编辑

cdb -c "$$>a< gcsex.txt" runasm.exe | grep -i Sign
Frameid = 0 FrameType = 1 Frame Signature = 1e7e
Frameid = 0 FrameType = 82 Frame Signature = 1e7e
Frameid = 0 FrameType = 81 Frame Signature = 1e7e
Frameid = 0 FrameType = 81 Frame Signature = 1e7e
Frameid = 0 FrameType = 81 Frame Signature = 1e7e
Frameid = 0 FrameType = 81 Frame Signature = 1e7e

cdb -c "$$>a< gcsex.txt" runasm.exe | grep -i Sign
Frameid = 0 FrameType = 1 Frame Signature = b649
Frameid = 0 FrameType = 82 Frame Signature = b649
Frameid = 0 FrameType = 81 Frame Signature = b649
Frameid = 0 FrameType = 81 Frame Signature = b649
Frameid = 0 FrameType = 81 Frame Signature = b649
Frameid = 0 FrameType = 81 Frame Signature = b649

cdb -c "$$>a< gcsex.txt" runasm.exe | grep -i Sign
Frameid = 0 FrameType = 1 Frame Signature = decf
Frameid = 0 FrameType = 82 Frame Signature = decf
Frameid = 0 FrameType = 81 Frame Signature = decf
Frameid = 0 FrameType = 81 Frame Signature = decf
Frameid = 0 FrameType = 81 Frame Signature = decf
Frameid = 0 FrameType = 81 Frame Signature = decf

cat gcsex.txt
.load gcsex
bp runasm!main "!gcsex;q"
g

Answer 2

这是使用一些包装器，但意图应该是明确的。如果IDebugSymbols4::GetNameByInlineContext表示它是内联框架，则使用InlineFrameContext，否则使用IDebugSymbols4 :: GetSymbolNameByOffset。

下面的C＃示例：

ulong displacement;
var builder = new StringBuilder(256);
var isInlineFrame = frame.InlineFrameContext.FrameType.HasFlag(StackFrameType.Inline);
if (isInlineFrame)
{
    _symbols5.GetNameByInlineContext(frame.InstructionOffset, frame.InlineFrameContext.ContextValue, ref builder, out displacement);                
}
else {
    _symbols5.GetSymbolNameByOffset(frame.InstructionOffset, ref builder, out displacement);
}
var name = builder.ToString();

使用IDebugControl5.GetContextStackTraceEx的内联堆栈帧？

2 个答案: