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Diffstat (limited to '')
| -rw-r--r-- | include/iprt/trace.h | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/include/iprt/trace.h b/include/iprt/trace.h new file mode 100644 index 00000000..6fdc2200 --- /dev/null +++ b/include/iprt/trace.h @@ -0,0 +1,218 @@ +/** @file + * IPRT - Tracing. + */ + +/* + * Copyright (C) 2011-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + +#ifndef IPRT_INCLUDED_trace_h +#define IPRT_INCLUDED_trace_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/cdefs.h> +#include <iprt/types.h> +#include <iprt/stdarg.h> + +RT_C_DECLS_BEGIN + +/** @defgroup grp_rt_trace RTTrace - Tracing + * @ingroup grp_rt + * + * The tracing facility is somewhat similar to a stripped down logger that + * outputs to a circular buffer. Part of the idea here is that it can the + * overhead is much smaller and that it can be done without involving any + * locking or other thing that could throw off timing. + * + * @{ + */ + + +#ifdef DOXYGEN_RUNNING +# define RTTRACE_DISABLED +# define RTTRACE_ENABLED +#endif + +/** @def RTTRACE_DISABLED + * Use this compile time define to disable all tracing macros. This trumps + * RTTRACE_ENABLED. + */ + +/** @def RTTRACE_ENABLED + * Use this compile time define to enable tracing when not in debug mode + */ + +/* + * Determine whether tracing is enabled and forcefully normalize the indicators. + */ +#if (defined(DEBUG) || defined(RTTRACE_ENABLED)) && !defined(RTTRACE_DISABLED) +# undef RTTRACE_DISABLED +# undef RTTRACE_ENABLED +# define RTTRACE_ENABLED +#else +# undef RTTRACE_DISABLED +# undef RTTRACE_ENABLED +# define RTTRACE_DISABLED +#endif + + +/** @name RTTRACEBUF_FLAGS_XXX - RTTraceBufCarve and RTTraceBufCreate flags. + * @{ */ +/** Free the memory block on release using RTMemFree(). */ +#define RTTRACEBUF_FLAGS_FREE_ME RT_BIT_32(0) +/** Whether the trace buffer is disabled or enabled. */ +#define RTTRACEBUF_FLAGS_DISABLED RT_BIT_32(RTTRACEBUF_FLAGS_DISABLED_BIT) +/** The bit number corresponding to the RTTRACEBUF_FLAGS_DISABLED mask. */ +#define RTTRACEBUF_FLAGS_DISABLED_BIT 1 +/** Mask of the valid flags. */ +#define RTTRACEBUF_FLAGS_MASK UINT32_C(0x00000003) +/** @} */ + + +RTDECL(int) RTTraceBufCreate(PRTTRACEBUF hTraceBuf, uint32_t cEntries, uint32_t cbEntry, uint32_t fFlags); +RTDECL(int) RTTraceBufCarve(PRTTRACEBUF hTraceBuf, uint32_t cEntries, uint32_t cbEntry, uint32_t fFlags, + void *pvBlock, size_t *pcbBlock); +RTDECL(uint32_t) RTTraceBufRetain(RTTRACEBUF hTraceBuf); +RTDECL(uint32_t) RTTraceBufRelease(RTTRACEBUF hTraceBuf); +RTDECL(int) RTTraceBufDumpToLog(RTTRACEBUF hTraceBuf); +RTDECL(int) RTTraceBufDumpToAssert(RTTRACEBUF hTraceBuf); + +/** + * Trace buffer callback for processing one entry. + * + * Used by RTTraceBufEnumEntries. + * + * @returns IPRT status code. Any status code but VINF_SUCCESS will abort the + * enumeration and be returned by RTTraceBufEnumEntries. + * @param hTraceBuf The trace buffer handle. + * @param iEntry The entry number. + * @param NanoTS The timestamp of the entry. + * @param idCpu The ID of the CPU which added the entry. + * @param pszMsg The message text. + * @param pvUser The user argument. + */ +typedef DECLCALLBACK(int) FNRTTRACEBUFCALLBACK(RTTRACEBUF hTraceBuf, uint32_t iEntry, uint64_t NanoTS, + RTCPUID idCpu, const char *pszMsg, void *pvUser); +/** Pointer to trace buffer enumeration callback function. */ +typedef FNRTTRACEBUFCALLBACK *PFNRTTRACEBUFCALLBACK; + +/** + * Enumerates the used trace buffer entries, calling @a pfnCallback for each. + * + * @returns IPRT status code. Should the callback (@a pfnCallback) return + * anything other than VINF_SUCCESS, then the enumeration will be + * aborted and the status code will be returned by this function. + * @retval VINF_SUCCESS + * @retval VERR_INVALID_HANDLE + * @retval VERR_INVALID_PARAMETER + * @retval VERR_INVALID_POINTER + * + * @param hTraceBuf The trace buffer handle. Special handles are + * accepted. + * @param pfnCallback The callback to call for each entry. + * @param pvUser The user argument for the callback. + */ +RTDECL(int) RTTraceBufEnumEntries(RTTRACEBUF hTraceBuf, PFNRTTRACEBUFCALLBACK pfnCallback, void *pvUser); + +/** + * Gets the entry size used by the specified trace buffer. + * + * @returns The size on success, 0 if the handle is invalid. + * + * @param hTraceBuf The trace buffer handle. Special handles are + * accepted. + */ +RTDECL(uint32_t) RTTraceBufGetEntrySize(RTTRACEBUF hTraceBuf); + +/** + * Gets the number of entries in the specified trace buffer. + * + * @returns The entry count on success, 0 if the handle is invalid. + * + * @param hTraceBuf The trace buffer handle. Special handles are + * accepted. + */ +RTDECL(uint32_t) RTTraceBufGetEntryCount(RTTRACEBUF hTraceBuf); + + +/** + * Disables tracing. + * + * @returns @c true if tracing was enabled prior to this call, @c false if + * disabled already. + * + * @param hTraceBuf The trace buffer handle. Special handles are + * accepted. + */ +RTDECL(bool) RTTraceBufDisable(RTTRACEBUF hTraceBuf); + +/** + * Enables tracing. + * + * @returns @c true if tracing was enabled prior to this call, @c false if + * disabled already. + * + * @param hTraceBuf The trace buffer handle. Special handles are + * accepted. + */ +RTDECL(bool) RTTraceBufEnable(RTTRACEBUF hTraceBuf); + + +RTDECL(int) RTTraceBufAddMsg( RTTRACEBUF hTraceBuf, const char *pszMsg); +RTDECL(int) RTTraceBufAddMsgF( RTTRACEBUF hTraceBuf, const char *pszMsgFmt, ...) RT_IPRT_FORMAT_ATTR(2, 3); +RTDECL(int) RTTraceBufAddMsgV( RTTRACEBUF hTraceBuf, const char *pszMsgFmt, va_list va) RT_IPRT_FORMAT_ATTR(2, 0); +RTDECL(int) RTTraceBufAddMsgEx( RTTRACEBUF hTraceBuf, const char *pszMsg, size_t cbMaxMsg); + +RTDECL(int) RTTraceBufAddPos( RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL); +RTDECL(int) RTTraceBufAddPosMsg( RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL, const char *pszMsg); +RTDECL(int) RTTraceBufAddPosMsgEx( RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL, const char *pszMsg, size_t cbMaxMsg); +RTDECL(int) RTTraceBufAddPosMsgF( RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL, const char *pszMsgFmt, ...) RT_IPRT_FORMAT_ATTR(5, 6); +RTDECL(int) RTTraceBufAddPosMsgV( RTTRACEBUF hTraceBuf, RT_SRC_POS_DECL, const char *pszMsgFmt, va_list va) RT_IPRT_FORMAT_ATTR(5, 0); + + +RTDECL(int) RTTraceSetDefaultBuf(RTTRACEBUF hTraceBuf); +RTDECL(RTTRACEBUF) RTTraceGetDefaultBuf(void); + + +/** @def RTTRACE_BUF + * The trace buffer used by the macros. + */ +#ifndef RTTRACE_BUF +# define RTTRACE_BUF NULL +#endif + +/** + * Record the current source position. + */ +#ifdef RTTRACE_ENABLED +# define RTTRACE_POS() do { RTTraceBufAddPos(RTTRACE_BUF, RT_SRC_POS); } while (0) +#else +# define RTTRACE_POS() do { } while (0) +#endif + + +/** @} */ + +RT_C_DECLS_END + +#endif /* !IPRT_INCLUDED_trace_h */ + |