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154 lines
7.2 KiB
C++
154 lines
7.2 KiB
C++
//========= Copyright <20> 1996-2008, Valve Corporation, All rights reserved. ============//
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//
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// Purpose: Tools for grabbing/dumping the stack at runtime
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//
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// $NoKeywords: $
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//=============================================================================//
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#ifndef TIER0_STACKTOOLS_H
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#define TIER0_STACKTOOLS_H
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#ifdef _WIN32
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#pragma once
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#endif
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#include "tier0/platform.h"
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#if (defined( PLATFORM_WINDOWS ) || defined( PLATFORM_X360 )) && !defined( STEAM ) && !defined( _CERT ) && defined( TCHAR_IS_CHAR ) //designed for windows/x360, not built/tested with wide characters, not intended for release builds (but probably wouldn't damage anything)
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# define ENABLE_RUNTIME_STACK_TRANSLATION //uncomment to enable runtime stack translation tools. All of which use on-demand loading of necessary dll's and pdb's
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#endif
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#if defined( ENABLE_RUNTIME_STACK_TRANSLATION )
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//#define ENABLE_THREAD_PARENT_STACK_TRACING 1 //uncomment to actually enable tracking stack traces from threads and jobs to their parent thread. Must also define THREAD_PARENT_STACK_TRACE_SUPPORTED in threadtools.h
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# if defined( ENABLE_THREAD_PARENT_STACK_TRACING )
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# define THREAD_PARENT_STACK_TRACE_LENGTH 32
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# endif
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#endif
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PLATFORM_INTERFACE int GetCallStack( void **pReturnAddressesOut, int iArrayCount, int iSkipCount );
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//ONLY WORKS IF THE CRAWLED PORTION OF THE STACK DISABLES FRAME POINTER OMISSION (/Oy-) "vpc /nofpo"
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PLATFORM_INTERFACE int GetCallStack_Fast( void **pReturnAddressesOut, int iArrayCount, int iSkipCount );
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typedef int (*FN_GetCallStack)( void **pReturnAddressesOut, int iArrayCount, int iSkipCount );
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//where we'll find our PDB's for win32.
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PLATFORM_INTERFACE void SetStackTranslationSymbolSearchPath( const char *szSemicolonSeparatedList = NULL );
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PLATFORM_INTERFACE void StackToolsNotify_LoadedLibrary( const char *szLibName );
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//maximum output sample "tier0.dll!TranslateStackInfo - u:\Dev\L4D\src\tier0\stacktools.cpp(162) + 4 bytes"
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enum TranslateStackInfo_StyleFlags_t
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{
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TSISTYLEFLAG_NONE = 0,
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TSISTYLEFLAG_MODULENAME = (1<<0), //start with module Sample: "tier0.dll!"
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TSISTYLEFLAG_SYMBOLNAME = (1<<1), //include the symbol name Sample: "TranslateStackInfo"
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TSISTYLEFLAG_FULLPATH = (1<<2), //include full path Sample: "u:\Dev\L4D\src\tier0\stacktools.cpp"
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TSISTYLEFLAG_SHORTPATH = (1<<3), //only include 2 directories Sample: "\src\tier0\stacktools.cpp"
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TSISTYLEFLAG_LINE = (1<<4), //file line number Sample: "(162)"
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TSISTYLEFLAG_LINEANDOFFSET = (1<<5), //file line + offset Sample: "(162) + 4 bytes"
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TSISTYLEFLAG_LAST = TSISTYLEFLAG_LINEANDOFFSET,
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TSISTYLEFLAG_DEFAULT = (TSISTYLEFLAG_MODULENAME | TSISTYLEFLAG_SYMBOLNAME | TSISTYLEFLAG_FULLPATH | TSISTYLEFLAG_LINEANDOFFSET), //produces sample above
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};
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//Generates a formatted list of function information, returns number of translated entries
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//On 360 this generates a string that can be decoded by VXConsole in print functions. Optimal path for translation because it's one way. Other paths require multiple transactions.
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PLATFORM_INTERFACE int TranslateStackInfo( const void * const *pCallStack, int iCallStackCount, tchar *szOutput, int iOutBufferSize, const tchar *szEntrySeparator, TranslateStackInfo_StyleFlags_t style = TSISTYLEFLAG_DEFAULT );
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PLATFORM_INTERFACE void PreloadStackInformation( void * const *pAddresses, int iAddressCount ); //caches data and reduces communication with VXConsole to speed up 360 decoding when using any of the Get***FromAddress() functions. Nop on PC.
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PLATFORM_INTERFACE bool GetFileAndLineFromAddress( const void *pAddress, tchar *pFileNameOut, int iMaxFileNameLength, uint32 &iLineNumberOut, uint32 *pDisplacementOut = NULL );
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PLATFORM_INTERFACE bool GetSymbolNameFromAddress( const void *pAddress, tchar *pSymbolNameOut, int iMaxSymbolNameLength, uint64 *pDisplacementOut = NULL );
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PLATFORM_INTERFACE bool GetModuleNameFromAddress( const void *pAddress, tchar *pModuleNameOut, int iMaxModuleNameLength );
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class PLATFORM_CLASS CCallStackStorage //a helper class to grab a stack trace as close to the leaf code surface as possible, then pass it on to deeper functions intact with less unpredictable inlining pollution
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{
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public:
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CCallStackStorage( FN_GetCallStack GetStackFunction = GetCallStack, uint32 iSkipCalls = 0 );
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CCallStackStorage( const CCallStackStorage ©From )
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{
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iValidEntries = copyFrom.iValidEntries;
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memcpy( pStack, copyFrom.pStack, sizeof( void * ) * copyFrom.iValidEntries );
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}
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void *pStack[128]; //probably too big, possibly too small for some applications. Don't want to spend the time figuring out how to generalize this without templatizing pollution or mallocs
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uint32 iValidEntries;
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};
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//Hold onto one of these to denote the top of a functional stack trace. Also allows us to string together threads to their parents
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class PLATFORM_CLASS CStackTop_Base
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{
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protected:
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#if defined( ENABLE_RUNTIME_STACK_TRANSLATION )
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CStackTop_Base *m_pPrevTop;
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void *m_pStackBase;
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void *m_pReplaceAddress;
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void * const *m_pParentStackTrace;
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int m_iParentStackTraceLength;
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#endif
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};
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//makes a copy of the parent stack
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class PLATFORM_CLASS CStackTop_CopyParentStack : public CStackTop_Base
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{
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public:
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CStackTop_CopyParentStack( void * const * pParentStackTrace, int iParentStackTraceLength );
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~CStackTop_CopyParentStack( void );
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};
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//just references the parent stack. Assuming that you'll keep that memory around as long as you're keeping this Stack Top marker.
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class PLATFORM_CLASS CStackTop_ReferenceParentStack : public CStackTop_Base
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{
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public:
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CStackTop_ReferenceParentStack( void * const * pParentStackTrace = NULL, int iParentStackTraceLength = 0 );
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~CStackTop_ReferenceParentStack( void );
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void ReleaseParentStackReferences( void ); //in case you need to delete the parent stack trace before this class goes out of scope
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};
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//Encodes data so that every byte's most significant bit is a 1. Ensuring no null terminators.
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//This puts the encoded data in the 128-255 value range. Leaving all standard ascii characters for control.
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//Returns string length (not including the written null terminator as is standard).
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//Or if the buffer is too small. Returns negative of necessary buffer size (including room needed for null terminator)
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PLATFORM_INTERFACE int EncodeBinaryToString( const void *pToEncode, int iDataLength, char *pEncodeOut, int iEncodeBufferSize );
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//Decodes a string produced by EncodeBinaryToString(). Safe to decode in place if you don't mind trashing your string, binary byte count always less than string byte count.
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//Returns:
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// >= 0 is the decoded data size
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// INT_MIN (most negative value possible) indicates an improperly formatted string (not our data)
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// all other negative values are the negative of how much dest buffer size is necessary.
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PLATFORM_INTERFACE int DecodeBinaryFromString( const char *pString, void *pDestBuffer, int iDestBufferSize, char **ppParseFinishOut = NULL );
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// 360<->VXConsole specific communication definitions
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#define XBX_CALLSTACKDECODEPREFIX ":CSDECODE["
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enum StackTranslation_BinaryHandler_Command_t
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{
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ST_BHC_LOADEDLIBARY,
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ST_BHC_GETTRANSLATIONINFO,
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};
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#pragma pack(push)
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#pragma pack(1)
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struct FullStackInfo_t
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{
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const void *pAddress;
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char szModuleName[24];
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char szFileName[MAX_PATH/2];
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char szSymbol[64];
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uint32 iLine;
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uint32 iSymbolOffset;
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};
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#pragma pack(pop)
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#endif //#ifndef TIER0_STACKTOOLS_H
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