Index: /trunk/include/iprt/err.h
===================================================================
--- /trunk/include/iprt/err.h	(revision 69010)
+++ /trunk/include/iprt/err.h	(revision 69011)
@@ -554,4 +554,117 @@
  */
 RTDECL(int)         RTErrInfoAddV(PRTERRINFO pErrInfo, int rc, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(3, 0);
+
+/** @name RTERRINFO_LOG_F_XXX
+ * @{ */
+/** Both debug and release log.   */
+#define RTERRINFO_LOG_F_RELEASE         RT_BIT_32(0)
+/** @} */
+
+/**
+ * Fills in the error info details.
+ *
+ * @returns @a rc.
+ *
+ * @param   pErrInfo            The error info structure to fill in.
+ * @param   rc                  The status code to return.
+ * @param   iLogGroup           The logging group.
+ * @param   fFlags              RTERRINFO_LOG_F_XXX.
+ * @param   pszMsg              The error message string.
+ */
+RTDECL(int)         RTErrInfoLogAndSet(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszMsg);
+
+/**
+ * Fills in the error info details, with a sprintf style message.
+ *
+ * @returns @a rc.
+ *
+ * @param   pErrInfo            The error info structure to fill in.
+ * @param   rc                  The status code to return.
+ * @param   iLogGroup           The logging group.
+ * @param   fFlags              RTERRINFO_LOG_F_XXX.
+ * @param   pszFormat           The format string.
+ * @param   ...                 The format arguments.
+ */
+RTDECL(int)         RTErrInfoLogAndSetF(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(5, 6);
+
+/**
+ * Fills in the error info details, with a vsprintf style message.
+ *
+ * @returns @a rc.
+ *
+ * @param   pErrInfo            The error info structure to fill in.
+ * @param   rc                  The status code to return.
+ * @param   iLogGroup           The logging group.
+ * @param   fFlags              RTERRINFO_LOG_F_XXX.
+ * @param   pszFormat           The format string.
+ * @param   va                  The format arguments.
+ */
+RTDECL(int)         RTErrInfoLogAndSetV(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(5, 0);
+
+/**
+ * Adds more error info details.
+ *
+ * @returns @a rc.
+ *
+ * @param   pErrInfo            The error info structure to fill in.
+ * @param   rc                  The status code to return.
+ * @param   iLogGroup           The logging group.
+ * @param   fFlags              RTERRINFO_LOG_F_XXX.
+ * @param   pszMsg              The error message string to add.
+ */
+RTDECL(int)         RTErrInfoLogAndAdd(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszMsg);
+
+/**
+ * Adds more error info details, with a sprintf style message.
+ *
+ * @returns @a rc.
+ *
+ * @param   pErrInfo            The error info structure to fill in.
+ * @param   rc                  The status code to return.
+ * @param   iLogGroup           The logging group.
+ * @param   fFlags              RTERRINFO_LOG_F_XXX.
+ * @param   pszFormat           The format string to add.
+ * @param   ...                 The format arguments.
+ */
+RTDECL(int)         RTErrInfoLogAndAddF(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszFormat, ...) RT_IPRT_FORMAT_ATTR(5, 6);
+
+/**
+ * Adds more error info details, with a vsprintf style message.
+ *
+ * @returns @a rc.
+ *
+ * @param   pErrInfo            The error info structure to fill in.
+ * @param   rc                  The status code to return.
+ * @param   iLogGroup           The logging group.
+ * @param   fFlags              RTERRINFO_LOG_F_XXX.
+ * @param   pszFormat           The format string to add.
+ * @param   va                  The format arguments.
+ */
+RTDECL(int)         RTErrInfoLogAndAddV(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszFormat, va_list va) RT_IPRT_FORMAT_ATTR(5, 0);
+
+/** @name Macros wrapping the RTErrInfoLog* functions.
+ * @{ */
+#define RTERRINFO_LOG_SET(  a_pErrInfo, a_rc, a_pszMsg)             RTErrInfoLogAndSet( a_pErrInfo, a_rc, LOG_GROUP, 0, a_pszMsg)
+#define RTERRINFO_LOG_SET_V(a_pErrInfo, a_rc, a_pszMsg, a_va)       RTErrInfoLogAndSetV(a_pErrInfo, a_rc, LOG_GROUP, 0, a_pszMsg, a_va)
+#define RTERRINFO_LOG_ADD(  a_pErrInfo, a_rc, a_pszMsg)             RTErrInfoLogAndAdd( a_pErrInfo, a_rc, LOG_GROUP, 0, a_pszMsg)
+#define RTERRINFO_LOG_ADD_V(a_pErrInfo, a_rc, a_pszMsg, a_va)       RTErrInfoLogAndAddV(a_pErrInfo, a_rc, LOG_GROUP, 0, a_pszMsg, a_va)
+#ifdef RT_COMPILER_SUPPORTS_VA_ARGS
+# define RTERRINFO_LOG_ADD_F(a_pErrInfo, a_rc, ...)                 RTErrInfoLogAndAddF(a_pErrInfo, a_rc, LOG_GROUP, 0, __VA_ARGS__)
+# define RTERRINFO_LOG_SET_F(a_pErrInfo, a_rc, ...)                 RTErrInfoLogAndSetF(a_pErrInfo, a_rc, LOG_GROUP, 0, __VA_ARGS__)
+#endif
+
+#define RTERRINFO_LOG_REL_SET(  a_pErrInfo, a_rc, a_pszMsg)         RTErrInfoLogAndSet( a_pErrInfo, a_rc, LOG_GROUP, RTERRINFO_LOG_F_RELEASE, a_pszMsg)
+#define RTERRINFO_LOG_REL_SET_V(a_pErrInfo, a_rc, a_pszMsg, a_va)   RTErrInfoLogAndSetV(a_pErrInfo, a_rc, LOG_GROUP, RTERRINFO_LOG_F_RELEASE, a_pszMsg, a_va)
+#define RTERRINFO_LOG_REL_ADD(  a_pErrInfo, a_rc, a_pszMsg)         RTErrInfoLogAndAdd( a_pErrInfo, a_rc, LOG_GROUP, RTERRINFO_LOG_F_RELEASE, a_pszMsg)
+#define RTERRINFO_LOG_REL_ADD_V(a_pErrInfo, a_rc, a_pszMsg, a_va)   RTErrInfoLogAndAddV(a_pErrInfo, a_rc, LOG_GROUP, RTERRINFO_LOG_F_RELEASE, a_pszMsg, a_va)
+#ifdef RT_COMPILER_SUPPORTS_VA_ARGS
+# define RTERRINFO_LOG_REL_ADD_F(a_pErrInfo, a_rc, ...)             RTErrInfoLogAndAddF(a_pErrInfo, a_rc, LOG_GROUP, RTERRINFO_LOG_F_RELEASE, __VA_ARGS__)
+# define RTERRINFO_LOG_REL_SET_F(a_pErrInfo, a_rc, ...)             RTErrInfoLogAndSetF(a_pErrInfo, a_rc, LOG_GROUP, RTERRINFO_LOG_F_RELEASE, __VA_ARGS__)
+#else
+# define RTERRINFO_LOG_REL_ADD_F                                    RTErrInfoSetF
+# define RTERRINFO_LOG_REL_SET_F                                    RTErrInfoAddF
+#endif
+/** @} */
+
 
 /**
Index: /trunk/include/iprt/mangling.h
===================================================================
--- /trunk/include/iprt/mangling.h	(revision 69010)
+++ /trunk/include/iprt/mangling.h	(revision 69011)
@@ -839,4 +839,10 @@
 # define RTErrInfoSetF                                  RT_MANGLER(RTErrInfoSetF)
 # define RTErrInfoSetV                                  RT_MANGLER(RTErrInfoSetV)
+# define RTErrInfoLogAndSet                             RT_MANGLER(RTErrInfoLogAndSet)
+# define RTErrInfoLogAndSetF                            RT_MANGLER(RTErrInfoLogAndSetF)
+# define RTErrInfoLogAndSetV                            RT_MANGLER(RTErrInfoLogAndSetV)
+# define RTErrInfoLogAndAdd                             RT_MANGLER(RTErrInfoLogAndAdd)
+# define RTErrInfoLogAndAddF                            RT_MANGLER(RTErrInfoLogAndAddF)
+# define RTErrInfoLogAndAddV                            RT_MANGLER(RTErrInfoLogAndAddV)
 # define RTErrVarsAreEqual                              RT_MANGLER(RTErrVarsAreEqual)
 # define RTErrVarsHaveChanged                           RT_MANGLER(RTErrVarsHaveChanged)
Index: /trunk/src/VBox/Runtime/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Runtime/Makefile.kmk	(revision 69010)
+++ /trunk/src/VBox/Runtime/Makefile.kmk	(revision 69011)
@@ -424,4 +424,5 @@
 	common/dvm/dvmvfs.cpp \
 	common/err/errinfo.cpp \
+	common/err/errinfolog.cpp \
 	common/err/errinfo-alloc.cpp \
 	common/err/errmsg.cpp \
@@ -2329,4 +2330,5 @@
 	common/checksum/sha512t256str.cpp \
 	common/err/errinfo.cpp \
+	common/err/errinfolog.cpp \
 	common/path/RTPathChangeToUnixSlashes.cpp \
 	common/math/bignum.cpp \
Index: /trunk/src/VBox/Runtime/common/err/errinfolog.cpp
===================================================================
--- /trunk/src/VBox/Runtime/common/err/errinfolog.cpp	(revision 69011)
+++ /trunk/src/VBox/Runtime/common/err/errinfolog.cpp	(revision 69011)
@@ -0,0 +1,185 @@
+/* $Id$ */
+/** @file
+ * IPRT - Error Info, Setters.
+ */
+
+/*
+ * Copyright (C) 2010-2016 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.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "internal/iprt.h"
+#include <iprt/err.h>
+
+#include <iprt/assert.h>
+#include <iprt/string.h>
+#include <iprt/log.h>
+
+
+RTDECL(int) RTErrInfoLogAndSet(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszMsg)
+{
+    /* The logging: */
+    if (fFlags & RTERRINFO_LOG_F_RELEASE)
+    {
+        PRTLOGGER pLogger = RTLogRelGetDefaultInstanceEx(RT_MAKE_U32(RTLOGGRPFLAGS_LEVEL_1, iLogGroup));
+        if (pLogger)
+            RTLogLoggerEx(pLogger, RTLOGGRPFLAGS_LEVEL_1, iLogGroup, "RTErrInfoSet(%Rrc): %s\n", rc, pszMsg);
+    }
+
+    PRTLOGGER pLogger = RTLogGetDefaultInstanceEx(RT_MAKE_U32(RTLOGGRPFLAGS_LEVEL_1, iLogGroup));
+    if (pLogger)
+        RTLogLoggerEx(pLogger, RTLOGGRPFLAGS_LEVEL_1, iLogGroup, "RTErrInfoSet(%Rrc): %s\n", rc, pszMsg);
+
+    /* The setting: */
+    if (pErrInfo)
+    {
+        AssertPtr(pErrInfo);
+        Assert((pErrInfo->fFlags & RTERRINFO_FLAGS_MAGIC_MASK) == RTERRINFO_FLAGS_MAGIC);
+
+        RTStrCopy(pErrInfo->pszMsg, pErrInfo->cbMsg, pszMsg);
+        pErrInfo->rc      = rc;
+        pErrInfo->fFlags |= RTERRINFO_FLAGS_SET;
+    }
+    return rc;
+}
+
+
+RTDECL(int) RTErrInfoLogAndSetF(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszFormat, ...)
+{
+    va_list va;
+    va_start(va, pszFormat);
+    RTErrInfoLogAndSetV(pErrInfo, rc, iLogGroup, fFlags, pszFormat, va);
+    va_end(va);
+    return rc;
+}
+
+
+RTDECL(int) RTErrInfoLogAndSetV(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszFormat, va_list va)
+{
+    /* The logging: */
+    if (fFlags & RTERRINFO_LOG_F_RELEASE)
+    {
+        PRTLOGGER pLogger = RTLogRelGetDefaultInstanceEx(RT_MAKE_U32(RTLOGGRPFLAGS_LEVEL_1, iLogGroup));
+        if (pLogger)
+            RTLogLoggerEx(pLogger, RTLOGGRPFLAGS_LEVEL_1, iLogGroup, "RTErrInfoSet(%Rrc): %N\n", rc, pszFormat, &va);
+    }
+
+    PRTLOGGER pLogger = RTLogGetDefaultInstanceEx(RT_MAKE_U32(RTLOGGRPFLAGS_LEVEL_1, iLogGroup));
+    if (pLogger)
+        RTLogLoggerEx(pLogger, RTLOGGRPFLAGS_LEVEL_1, iLogGroup, "RTErrInfoSet(%Rrc): %N\n", rc, pszFormat, &va);
+
+    /* The setting: */
+    if (pErrInfo)
+    {
+        AssertPtr(pErrInfo);
+        Assert((pErrInfo->fFlags & RTERRINFO_FLAGS_MAGIC_MASK) == RTERRINFO_FLAGS_MAGIC);
+
+        RTStrPrintfV(pErrInfo->pszMsg, pErrInfo->cbMsg, pszFormat, va);
+        pErrInfo->rc      = rc;
+        pErrInfo->fFlags |= RTERRINFO_FLAGS_SET;
+    }
+    return rc;
+}
+
+
+RTDECL(int) RTErrInfoLogAndAdd(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszMsg)
+{
+    if (pErrInfo)
+    {
+        AssertPtr(pErrInfo);
+        if (pErrInfo->fFlags & RTERRINFO_FLAGS_SET)
+            RTStrCat(pErrInfo->pszMsg, pErrInfo->cbMsg, pszMsg);
+        else
+        {
+            while (*pszMsg == ' ')
+                pszMsg++;
+            return RTErrInfoSet(pErrInfo, rc, pszMsg);
+        }
+    }
+
+    /* The logging: */
+    if (fFlags & RTERRINFO_LOG_F_RELEASE)
+    {
+        PRTLOGGER pLogger = RTLogRelGetDefaultInstanceEx(RT_MAKE_U32(RTLOGGRPFLAGS_LEVEL_1, iLogGroup));
+        if (pLogger)
+            RTLogLoggerEx(pLogger, RTLOGGRPFLAGS_LEVEL_1, iLogGroup, "RTErrInfoAdd(%Rrc): %s\n", rc, pszMsg);
+    }
+
+    PRTLOGGER pLogger = RTLogGetDefaultInstanceEx(RT_MAKE_U32(RTLOGGRPFLAGS_LEVEL_1, iLogGroup));
+    if (pLogger)
+        RTLogLoggerEx(pLogger, RTLOGGRPFLAGS_LEVEL_1, iLogGroup, "RTErrInfoAdd(%Rrc): %s\n", rc, pszMsg);
+
+    return rc;
+}
+
+
+RTDECL(int) RTErrInfoLogAndAddF(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszFormat, ...)
+{
+    va_list va;
+    va_start(va, pszFormat);
+    RTErrInfoLogAndAddV(pErrInfo, rc, iLogGroup, fFlags, pszFormat, va);
+    va_end(va);
+    return rc;
+}
+
+
+RTDECL(int) RTErrInfoLogAndAddV(PRTERRINFO pErrInfo, int rc, uint32_t iLogGroup, uint32_t fFlags, const char *pszFormat, va_list va)
+{
+    if (pErrInfo)
+    {
+        AssertPtr(pErrInfo);
+        Assert((pErrInfo->fFlags & RTERRINFO_FLAGS_MAGIC_MASK) == RTERRINFO_FLAGS_MAGIC);
+        if (pErrInfo->fFlags & RTERRINFO_FLAGS_SET)
+        {
+            char *pszOut = (char *)memchr(pErrInfo->pszMsg, '\0', pErrInfo->cbMsg - 2);
+            if (pszOut)
+            {
+                va_list va2;
+                va_copy(va2, va);
+                RTStrPrintfV(pszOut, &pErrInfo->pszMsg[pErrInfo->cbMsg] - pszOut, pszFormat, va2);
+                va_end(va2);
+            }
+        }
+        else
+        {
+            while (*pszFormat == ' ')
+                pszFormat++;
+            return RTErrInfoSetV(pErrInfo, rc, pszFormat, va);
+        }
+    }
+
+    /* The logging: */
+    if (fFlags & RTERRINFO_LOG_F_RELEASE)
+    {
+        PRTLOGGER pLogger = RTLogRelGetDefaultInstanceEx(RT_MAKE_U32(RTLOGGRPFLAGS_LEVEL_1, iLogGroup));
+        if (pLogger)
+            RTLogLoggerEx(pLogger, RTLOGGRPFLAGS_LEVEL_1, iLogGroup, "RTErrInfoAdd(%Rrc): %N\n", rc, pszFormat, &va);
+    }
+
+    PRTLOGGER pLogger = RTLogGetDefaultInstanceEx(RT_MAKE_U32(RTLOGGRPFLAGS_LEVEL_1, iLogGroup));
+    if (pLogger)
+        RTLogLoggerEx(pLogger, RTLOGGRPFLAGS_LEVEL_1, iLogGroup, "RTErrInfoAdd(%Rrc): %N\n", rc, pszFormat, &va);
+
+    return rc;
+}
+
