source-engine/public/tier0/minidump.h

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: 
//
//=============================================================================//

#ifndef MINIDUMP_H
#define MINIDUMP_H
#ifdef _WIN32
#pragma once
#endif

#include "tier0/platform.h"

// Set prefix to use for minidump files.  If you don't set one, it is defaulted for you,
// using the current module name
PLATFORM_INTERFACE void SetMinidumpFilenamePrefix( const char *pszPrefix );

// Set comment to put into minidump file upon next call of WriteMiniDump.  (Most common use is the assert text.)
PLATFORM_INTERFACE void SetMinidumpComment( const char *pszComment );

// writes out a minidump of the current stack trace with a unique filename
PLATFORM_INTERFACE void WriteMiniDump( const char *pszFilenameSuffix = NULL );

typedef void (*FnWMain)( int , tchar *[] );
typedef void (*FnVoidPtrFn)( void * );

#if defined(_WIN32) && !defined(_X360)

// calls the passed in function pointer and catches any exceptions/crashes thrown by it, and writes a minidump
// use from wmain() to protect the whole program
typedef void (*FnWMain)( int , tchar *[] );
typedef int (*FnWMainIntRet)( int , tchar *[] );
typedef void (*FnVoidPtrFn)( void * );

enum ECatchAndWriteMinidumpAction
{
	k_ECatchAndWriteMiniDumpAbort = 0,
	k_ECatchAndWriteMiniDumpReThrow = 1,
	k_ECatchAndWriteMiniDumpIgnore = 2,
};

PLATFORM_INTERFACE void CatchAndWriteMiniDump( FnWMain pfn, int argc, tchar *argv[] ); // action = Abort
PLATFORM_INTERFACE void CatchAndWriteMiniDumpForVoidPtrFn( FnVoidPtrFn pfn, void *pv, bool bExitQuietly ); // action = abort if bExitQuietly, Rethrow otherwise

PLATFORM_INTERFACE void CatchAndWriteMiniDumpEx( FnWMain pfn, int argc, tchar *argv[], ECatchAndWriteMinidumpAction eAction );
PLATFORM_INTERFACE int CatchAndWriteMiniDumpExReturnsInt( FnWMainIntRet pfn, int argc, tchar *argv[], ECatchAndWriteMinidumpAction eAction );
PLATFORM_INTERFACE void CatchAndWriteMiniDumpExForVoidPtrFn( FnVoidPtrFn pfn, void *pv, ECatchAndWriteMinidumpAction eAction );

// Let's not include this.  We'll use forwards instead.
//#include <dbghelp.h>
struct _EXCEPTION_POINTERS;

// Replaces the current function pointer with the one passed in.
// Returns the previously-set function.
// The function is called internally by WriteMiniDump() and CatchAndWriteMiniDump()
// The default is the built-in function that uses DbgHlp.dll's MiniDumpWriteDump function
typedef void (*FnMiniDump)( unsigned int uStructuredExceptionCode, _EXCEPTION_POINTERS * pExceptionInfo, const char *pszFilenameSuffix );
PLATFORM_INTERFACE FnMiniDump SetMiniDumpFunction( FnMiniDump pfn );

// Use this to write a minidump explicitly.
// Some of the tools choose to catch the minidump themselves instead of using CatchAndWriteMinidump
// so they can show their own dialog.
//
// ptchMinidumpFileNameBuffer if not-NULL should be a writable tchar buffer of length at
// least _MAX_PATH and on return will contain the name of the minidump file written.
// If ptchMinidumpFileNameBuffer is NULL the name of the minidump file written will not
// be available after the function returns.
//
PLATFORM_INTERFACE bool WriteMiniDumpUsingExceptionInfo( 
	unsigned int uStructuredExceptionCode,
	_EXCEPTION_POINTERS * pExceptionInfo, 
	int /* MINIDUMP_TYPE */ minidumpType,
	const char *pszFilenameSuffix = NULL,
	tchar *ptchMinidumpFileNameBuffer = NULL
	);

// Call this to enable a handler for unhandled exceptions.
PLATFORM_INTERFACE void MinidumpSetUnhandledExceptionFunction( FnMiniDump pfn );

// Call this to prevent crashes in kernel callbacks such as window procs from
// being silently swallowed. We should always call this at startup.
PLATFORM_INTERFACE void EnableCrashingOnCrashes();

#endif // defined(_WIN32) && !defined(_X360)

//
// Minidump User Stream Info Comments.
//
// There currently is a single header string, and an array of 64 comment strings.
//	MinidumpUserStreamInfoSetHeader() will set the single header string.
//	MinidumpUserStreamInfoAppend() will round robin through and array and set the comment strings, overwriting old.
PLATFORM_INTERFACE void MinidumpUserStreamInfoSetHeader( const char *pFormat, ... );
PLATFORM_INTERFACE void MinidumpUserStreamInfoAppend( const char *pFormat, ... );

// Retrieve the StreamInfo strings.
//  Index 0: header string
//  Index 1..: comment string
//  Returns NULL when you've reached the end of the comment string array
//  Empty strings ("\0") can be returned if comment hasn't been set
PLATFORM_INTERFACE const char *MinidumpUserStreamInfoGet( int Index );

#endif // MINIDUMP_H