360 lines
12 KiB
C
360 lines
12 KiB
C
/*********************************************************
|
|
* Copyright (C) 1998-2015 VMware, Inc. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published
|
|
* by the Free Software Foundation version 2.1 and no later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
* or FITNESS FOR A PARTICULAR PURPOSE. See the Lesser GNU General Public
|
|
* License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*
|
|
*********************************************************/
|
|
|
|
/*********************************************************
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
*********************************************************/
|
|
|
|
/*********************************************************
|
|
* The contents of this file are subject to the terms of the Common
|
|
* Development and Distribution License (the "License") version 1.0
|
|
* and no later version. You may not use this file except in
|
|
* compliance with the License.
|
|
*
|
|
* You can obtain a copy of the License at
|
|
* http://www.opensource.org/licenses/cddl1.php
|
|
*
|
|
* See the License for the specific language governing permissions
|
|
* and limitations under the License.
|
|
*
|
|
*********************************************************/
|
|
|
|
/*
|
|
* vm_assert.h --
|
|
*
|
|
* The basic assertion facility for all VMware code.
|
|
*
|
|
* For proper use, see bora/doc/assert and
|
|
* http://vmweb.vmware.com/~mts/WebSite/guide/programming/asserts.html.
|
|
*/
|
|
|
|
#ifndef _VM_ASSERT_H_
|
|
#define _VM_ASSERT_H_
|
|
|
|
// XXX not necessary except some places include vm_assert.h improperly
|
|
#include "vm_basic_types.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
* Some bits of vmcore are used in VMKernel code and cannot have
|
|
* the VMKERNEL define due to other header dependencies.
|
|
*/
|
|
#if defined(VMKERNEL) && !defined(VMKPANIC)
|
|
#define VMKPANIC 1
|
|
#endif
|
|
|
|
/*
|
|
* Internal macros, functions, and strings
|
|
*
|
|
* The monitor wants to save space at call sites, so it has specialized
|
|
* functions for each situation. User level wants to save on implementation
|
|
* so it uses generic functions.
|
|
*/
|
|
|
|
#if !defined VMM || defined MONITOR_APP // {
|
|
|
|
#if defined VMKPANIC
|
|
|
|
#include "vmk_assert.h"
|
|
|
|
#else /* !VMKPANIC */
|
|
#define _ASSERT_PANIC(name) \
|
|
Panic(_##name##Fmt "\n", __FILE__, __LINE__)
|
|
#define _ASSERT_PANIC_BUG(bug, name) \
|
|
Panic(_##name##Fmt " bugNr=%d\n", __FILE__, __LINE__, bug)
|
|
#define _ASSERT_PANIC_NORETURN(name) \
|
|
Panic(_##name##Fmt "\n", __FILE__, __LINE__)
|
|
#define _ASSERT_PANIC_BUG_NORETURN(bug, name) \
|
|
Panic(_##name##Fmt " bugNr=%d\n", __FILE__, __LINE__, bug)
|
|
#endif /* VMKPANIC */
|
|
|
|
#endif // }
|
|
|
|
|
|
// These strings don't have newline so that a bug can be tacked on.
|
|
#define _AssertPanicFmt "PANIC %s:%d"
|
|
#define _AssertAssertFmt "ASSERT %s:%d"
|
|
#define _AssertVerifyFmt "VERIFY %s:%d"
|
|
#define _AssertNotImplementedFmt "NOT_IMPLEMENTED %s:%d"
|
|
#define _AssertNotReachedFmt "NOT_REACHED %s:%d"
|
|
#define _AssertMemAllocFmt "MEM_ALLOC %s:%d"
|
|
#define _AssertNotTestedFmt "NOT_TESTED %s:%d"
|
|
|
|
|
|
/*
|
|
* Panic and log functions
|
|
*/
|
|
|
|
void Log(const char *fmt, ...) PRINTF_DECL(1, 2);
|
|
void Warning(const char *fmt, ...) PRINTF_DECL(1, 2);
|
|
#if defined VMKPANIC
|
|
void Panic_SaveRegs(void);
|
|
|
|
#ifdef VMX86_DEBUG
|
|
void Panic_NoSave(const char *fmt, ...) PRINTF_DECL(1, 2);
|
|
#else
|
|
NORETURN void Panic_NoSave(const char *fmt, ...) PRINTF_DECL(1, 2);
|
|
#endif
|
|
|
|
NORETURN void Panic_NoSaveNoReturn(const char *fmt, ...) PRINTF_DECL(1, 2);
|
|
|
|
#define Panic(fmt...) do { \
|
|
Panic_SaveRegs(); \
|
|
Panic_NoSave(fmt); \
|
|
} while(0)
|
|
|
|
#define Panic_NoReturn(fmt...) do { \
|
|
Panic_SaveRegs(); \
|
|
Panic_NoSaveNoReturn(fmt); \
|
|
} while(0)
|
|
|
|
#else
|
|
NORETURN void Panic(const char *fmt, ...) PRINTF_DECL(1, 2);
|
|
#endif
|
|
|
|
void LogThrottled(uint32 *count, const char *fmt, ...) PRINTF_DECL(2, 3);
|
|
void WarningThrottled(uint32 *count, const char *fmt, ...) PRINTF_DECL(2, 3);
|
|
|
|
|
|
#ifndef ASSERT_IFNOT
|
|
/*
|
|
* PR 271512: When compiling with gcc, catch assignments inside an ASSERT.
|
|
*
|
|
* 'UNLIKELY' is defined with __builtin_expect, which does not warn when
|
|
* passed an assignment (gcc bug 36050). To get around this, we put 'cond'
|
|
* in an 'if' statement and make sure it never gets executed by putting
|
|
* that inside of 'if (0)'. We use gcc's statement expression syntax to
|
|
* make ASSERT an expression because some code uses it that way.
|
|
*
|
|
* Since statement expression syntax is a gcc extension and since it's
|
|
* not clear if this is a problem with other compilers, the ASSERT
|
|
* definition was not changed for them. Using a bare 'cond' with the
|
|
* ternary operator may provide a solution.
|
|
*/
|
|
|
|
#ifdef __GNUC__
|
|
#define ASSERT_IFNOT(cond, panic) \
|
|
({if (UNLIKELY(!(cond))) { panic; if (0) { if (cond) {;}}} (void)0;})
|
|
#else
|
|
#define ASSERT_IFNOT(cond, panic) \
|
|
(UNLIKELY(!(cond)) ? (panic) : (void)0)
|
|
#endif
|
|
#endif
|
|
|
|
|
|
/*
|
|
* Assert, panic, and log macros
|
|
*
|
|
* Some of these are redefined below undef !VMX86_DEBUG.
|
|
* ASSERT() is special cased because of interaction with Windows DDK.
|
|
*/
|
|
|
|
#if defined VMX86_DEBUG
|
|
#undef ASSERT
|
|
#define ASSERT(cond) ASSERT_IFNOT(cond, _ASSERT_PANIC(AssertAssert))
|
|
#define ASSERT_BUG(bug, cond) \
|
|
ASSERT_IFNOT(cond, _ASSERT_PANIC_BUG(bug, AssertAssert))
|
|
#endif
|
|
|
|
#undef VERIFY
|
|
#define VERIFY(cond) \
|
|
ASSERT_IFNOT(cond, _ASSERT_PANIC_NORETURN(AssertVerify))
|
|
#define VERIFY_BUG(bug, cond) \
|
|
ASSERT_IFNOT(cond, _ASSERT_PANIC_BUG_NORETURN(bug, AssertVerify))
|
|
|
|
#define PANIC() _ASSERT_PANIC(AssertPanic)
|
|
#define PANIC_BUG(bug) _ASSERT_PANIC_BUG(bug, AssertPanic)
|
|
|
|
#define ASSERT_NOT_IMPLEMENTED(cond) \
|
|
ASSERT_IFNOT(cond, NOT_IMPLEMENTED())
|
|
#define ASSERT_NOT_IMPLEMENTED_BUG(bug, cond) \
|
|
ASSERT_IFNOT(cond, NOT_IMPLEMENTED_BUG(bug))
|
|
|
|
#if defined VMKPANIC || defined VMM
|
|
#define NOT_IMPLEMENTED() _ASSERT_PANIC_NORETURN(AssertNotImplemented)
|
|
#else
|
|
#define NOT_IMPLEMENTED() _ASSERT_PANIC(AssertNotImplemented)
|
|
#endif
|
|
|
|
#if defined VMM
|
|
#define NOT_IMPLEMENTED_BUG(bug) \
|
|
_ASSERT_PANIC_BUG_NORETURN(bug, AssertNotImplemented)
|
|
#else
|
|
#define NOT_IMPLEMENTED_BUG(bug) _ASSERT_PANIC_BUG(bug, AssertNotImplemented)
|
|
#endif
|
|
|
|
#if defined VMKPANIC || defined VMM
|
|
#define NOT_REACHED() _ASSERT_PANIC_NORETURN(AssertNotReached)
|
|
#else
|
|
#define NOT_REACHED() _ASSERT_PANIC(AssertNotReached)
|
|
#endif
|
|
|
|
#define ASSERT_MEM_ALLOC(cond) \
|
|
ASSERT_IFNOT(cond, _ASSERT_PANIC(AssertMemAlloc))
|
|
|
|
#ifdef VMX86_DEVEL
|
|
#define ASSERT_DEVEL(cond) ASSERT(cond)
|
|
#define NOT_TESTED() Warning(_AssertNotTestedFmt "\n", __FILE__, __LINE__)
|
|
#else
|
|
#define ASSERT_DEVEL(cond) ((void)0)
|
|
#define NOT_TESTED() Log(_AssertNotTestedFmt "\n", __FILE__, __LINE__)
|
|
#endif
|
|
|
|
#define ASSERT_NO_INTERRUPTS() ASSERT(!INTERRUPTS_ENABLED())
|
|
#define ASSERT_HAS_INTERRUPTS() ASSERT(INTERRUPTS_ENABLED())
|
|
|
|
#define ASSERT_NOT_TESTED(cond) (UNLIKELY(!(cond)) ? NOT_TESTED() : (void)0)
|
|
#define NOT_TESTED_ONCE() DO_ONCE(NOT_TESTED())
|
|
|
|
#define NOT_TESTED_1024() \
|
|
do { \
|
|
static uint16 count = 0; \
|
|
if (UNLIKELY(count == 0)) { NOT_TESTED(); } \
|
|
count = (count + 1) & 1023; \
|
|
} while (0)
|
|
|
|
#define LOG_ONCE(_s) DO_ONCE(Log _s)
|
|
|
|
|
|
/*
|
|
* Redefine macros that are only in debug versions
|
|
*/
|
|
|
|
#if !defined VMX86_DEBUG // {
|
|
|
|
#undef ASSERT
|
|
#define ASSERT(cond) ((void)0)
|
|
#define ASSERT_BUG(bug, cond) ((void)0)
|
|
|
|
/*
|
|
* Expand NOT_REACHED() as appropriate for each situation.
|
|
*
|
|
* Mainly, we want the compiler to infer the same control-flow
|
|
* information as it would from Panic(). Otherwise, different
|
|
* compilation options will lead to different control-flow-derived
|
|
* errors, causing some make targets to fail while others succeed.
|
|
*
|
|
* VC++ has the __assume() built-in function which we don't trust
|
|
* (see bug 43485); gcc has no such construct; we just panic in
|
|
* userlevel code. The monitor doesn't want to pay the size penalty
|
|
* (measured at 212 bytes for the release vmm for a minimal infinite
|
|
* loop; panic would cost even more) so it does without and lives
|
|
* with the inconsistency.
|
|
*/
|
|
|
|
#if defined VMKPANIC || defined VMM
|
|
#undef NOT_REACHED
|
|
#if defined __GNUC__ && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 5)
|
|
#define NOT_REACHED() (__builtin_unreachable())
|
|
#else
|
|
#define NOT_REACHED() ((void)0)
|
|
#endif
|
|
#else
|
|
// keep debug definition
|
|
#endif
|
|
|
|
#undef LOG_UNEXPECTED
|
|
#define LOG_UNEXPECTED(bug) ((void)0)
|
|
|
|
#undef ASSERT_NOT_TESTED
|
|
#define ASSERT_NOT_TESTED(cond) ((void)0)
|
|
#undef NOT_TESTED
|
|
#define NOT_TESTED() ((void)0)
|
|
#undef NOT_TESTED_ONCE
|
|
#define NOT_TESTED_ONCE() ((void)0)
|
|
#undef NOT_TESTED_1024
|
|
#define NOT_TESTED_1024() ((void)0)
|
|
|
|
#endif // !VMX86_DEBUG }
|
|
|
|
|
|
/*
|
|
* Compile-time assertions.
|
|
*
|
|
* ASSERT_ON_COMPILE does not use the common
|
|
* switch (0) { case 0: case (e): ; } trick because some compilers (e.g. MSVC)
|
|
* generate code for it.
|
|
*
|
|
* The implementation uses both enum and typedef because the typedef alone is
|
|
* insufficient; gcc allows arrays to be declared with non-constant expressions
|
|
* (even in typedefs, where it makes no sense).
|
|
*
|
|
* NOTE: if GCC ever changes so that it ignores unused types altogether, this
|
|
* assert might not fire! We explicitly mark it as unused because GCC 4.8+
|
|
* uses -Wunused-local-typedefs as part of -Wall, which means the typedef will
|
|
* generate a warning.
|
|
*/
|
|
|
|
#define ASSERT_ON_COMPILE(e) \
|
|
do { \
|
|
enum { AssertOnCompileMisused = ((e) ? 1 : -1) }; \
|
|
UNUSED_TYPE(typedef char AssertOnCompileFailed[AssertOnCompileMisused]); \
|
|
} while (0)
|
|
|
|
|
|
/*
|
|
* To put an ASSERT_ON_COMPILE() outside a function, wrap it
|
|
* in MY_ASSERTS(). The first parameter must be unique in
|
|
* each .c file where it appears. For example,
|
|
*
|
|
* MY_ASSERTS(FS3_INT,
|
|
* ASSERT_ON_COMPILE(sizeof(FS3_DiskLock) == 128);
|
|
* ASSERT_ON_COMPILE(sizeof(FS3_DiskLockReserved) == DISK_BLOCK_SIZE);
|
|
* ASSERT_ON_COMPILE(sizeof(FS3_DiskBlock) == DISK_BLOCK_SIZE);
|
|
* ASSERT_ON_COMPILE(sizeof(Hardware_DMIUUID) == 16);
|
|
* )
|
|
*
|
|
* Caution: ASSERT() within MY_ASSERTS() is silently ignored.
|
|
* The same goes for anything else not evaluated at compile time.
|
|
*/
|
|
|
|
#define MY_ASSERTS(name, assertions) \
|
|
static INLINE void name(void) { \
|
|
assertions \
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
#endif /* ifndef _VM_ASSERT_H_ */
|