Adding upstream version 6.0.4-dfsg.upstream/6.0.4-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 */
+