330 lines
12 KiB
C
330 lines
12 KiB
C
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsDebug_h___
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#define nsDebug_h___
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#include "nscore.h"
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#include "nsError.h"
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#include "nsXPCOM.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/glue/Debug.h"
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#include "mozilla/DbgMacro.h"
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#include "mozilla/Likely.h"
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#include <stdarg.h>
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#ifdef DEBUG
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# include "mozilla/ErrorNames.h"
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# include "mozilla/IntegerPrintfMacros.h"
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# include "mozilla/Printf.h"
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#endif
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/**
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* Warn if the given condition is true. The condition is evaluated in both
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* release and debug builds, and the result is an expression which can be
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* used in subsequent expressions, such as:
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*
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* if (NS_WARN_IF(NS_FAILED(rv)) {
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* return rv;
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* }
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*
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* This explicit warning and return is preferred to the NS_ENSURE_* macros
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* which hide the warning and the return control flow.
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*
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* This macro can also be used outside of conditions just to issue a warning,
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* like so:
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*
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* Unused << NS_WARN_IF(NS_FAILED(FnWithSideEffects());
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*
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* (The |Unused <<| is necessary because of the [[nodiscard]] annotation.)
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*
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* However, note that the argument to this macro is evaluated in all builds. If
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* you just want a warning assertion, it is better to use NS_WARNING_ASSERTION
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* (which evaluates the condition only in debug builds) like so:
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*
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* NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "operation failed");
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*
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* @note This is C++-only
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*/
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#ifdef __cplusplus
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# ifdef DEBUG
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[[nodiscard]] inline bool NS_warn_if_impl(bool aCondition, const char* aExpr,
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const char* aFile, int32_t aLine) {
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if (MOZ_UNLIKELY(aCondition)) {
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NS_DebugBreak(NS_DEBUG_WARNING, nullptr, aExpr, aFile, aLine);
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}
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return aCondition;
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}
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# define NS_WARN_IF(condition) \
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NS_warn_if_impl(condition, #condition, __FILE__, __LINE__)
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# else
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# define NS_WARN_IF(condition) (bool)(condition)
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# endif
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#endif
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/**
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* Test an assertion for truth. If the expression is not true then
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* emit a warning.
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*
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* Program execution continues past the usage of this macro.
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*
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* Note also that the non-debug version of this macro does <b>not</b>
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* evaluate the message argument.
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*/
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#ifdef DEBUG
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# define NS_WARNING_ASSERTION(_expr, _msg) \
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do { \
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if (!(_expr)) { \
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NS_DebugBreak(NS_DEBUG_WARNING, _msg, #_expr, __FILE__, __LINE__); \
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} \
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} while (false)
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#else
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# define NS_WARNING_ASSERTION(_expr, _msg) \
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do { /* nothing */ \
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} while (false)
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#endif
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/**
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* Test an assertion for truth. If the expression is not true then
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* trigger a program failure.
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*
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* Note that the non-debug version of this macro does <b>not</b>
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* evaluate the message argument.
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*/
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#ifdef DEBUG
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inline void MOZ_PretendNoReturn() MOZ_PRETEND_NORETURN_FOR_STATIC_ANALYSIS {}
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# define NS_ASSERTION(expr, str) \
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do { \
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if (!(expr)) { \
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NS_DebugBreak(NS_DEBUG_ASSERTION, str, #expr, __FILE__, __LINE__); \
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MOZ_PretendNoReturn(); \
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} \
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} while (0)
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#else
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# define NS_ASSERTION(expr, str) \
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do { /* nothing */ \
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} while (0)
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#endif
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/**
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* Log an error message.
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*/
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#ifdef DEBUG
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# define NS_ERROR(str) \
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do { \
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NS_DebugBreak(NS_DEBUG_ASSERTION, str, "Error", __FILE__, __LINE__); \
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MOZ_PretendNoReturn(); \
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} while (0)
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#else
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# define NS_ERROR(str) \
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do { /* nothing */ \
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} while (0)
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#endif
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/**
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* Log a warning message.
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*/
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#ifdef DEBUG
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# define NS_WARNING(str) \
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NS_DebugBreak(NS_DEBUG_WARNING, str, nullptr, __FILE__, __LINE__)
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#else
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# define NS_WARNING(str) \
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do { /* nothing */ \
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} while (0)
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#endif
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/**
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* Trigger a debugger breakpoint, only in debug builds.
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*/
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#ifdef DEBUG
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# define NS_BREAK() \
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do { \
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NS_DebugBreak(NS_DEBUG_BREAK, nullptr, nullptr, __FILE__, __LINE__); \
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MOZ_PretendNoReturn(); \
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} while (0)
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#else
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# define NS_BREAK() \
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do { /* nothing */ \
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} while (0)
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#endif
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/******************************************************************************
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** Macros for static assertions. These are used by the sixgill tool.
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** When the tool is not running these macros are no-ops.
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******************************************************************************/
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/* Avoid name collision if included with other headers defining annotations. */
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#ifndef HAVE_STATIC_ANNOTATIONS
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# define HAVE_STATIC_ANNOTATIONS
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# ifdef XGILL_PLUGIN
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# define STATIC_PRECONDITION(COND) __attribute__((precondition(#COND)))
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# define STATIC_PRECONDITION_ASSUME(COND) \
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__attribute__((precondition_assume(#COND)))
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# define STATIC_POSTCONDITION(COND) __attribute__((postcondition(#COND)))
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# define STATIC_POSTCONDITION_ASSUME(COND) \
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__attribute__((postcondition_assume(#COND)))
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# define STATIC_INVARIANT(COND) __attribute__((invariant(#COND)))
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# define STATIC_INVARIANT_ASSUME(COND) \
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__attribute__((invariant_assume(#COND)))
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/* Used to make identifiers for assert/assume annotations in a function. */
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# define STATIC_PASTE2(X, Y) X##Y
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# define STATIC_PASTE1(X, Y) STATIC_PASTE2(X, Y)
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# define STATIC_ASSUME(COND) \
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do { \
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__attribute__((assume_static(#COND), unused)) int STATIC_PASTE1( \
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assume_static_, __COUNTER__); \
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} while (false)
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# define STATIC_ASSERT_RUNTIME(COND) \
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do { \
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__attribute__((assert_static_runtime(#COND), \
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unused)) int STATIC_PASTE1(assert_static_runtime_, \
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__COUNTER__); \
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} while (false)
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# else /* XGILL_PLUGIN */
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# define STATIC_PRECONDITION(COND) /* nothing */
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# define STATIC_PRECONDITION_ASSUME(COND) /* nothing */
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# define STATIC_POSTCONDITION(COND) /* nothing */
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# define STATIC_POSTCONDITION_ASSUME(COND) /* nothing */
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# define STATIC_INVARIANT(COND) /* nothing */
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# define STATIC_INVARIANT_ASSUME(COND) /* nothing */
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# define STATIC_ASSUME(COND) \
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do { /* nothing */ \
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} while (false)
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# define STATIC_ASSERT_RUNTIME(COND) \
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do { /* nothing */ \
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} while (false)
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# endif /* XGILL_PLUGIN */
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# define STATIC_SKIP_INFERENCE STATIC_INVARIANT(skip_inference())
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#endif /* HAVE_STATIC_ANNOTATIONS */
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/******************************************************************************
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** Macros for terminating execution when an unrecoverable condition is
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** reached. These need to be compiled regardless of the DEBUG flag.
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******************************************************************************/
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/* Macros for checking the trueness of an expression passed in within an
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* interface implementation. These need to be compiled regardless of the
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* DEBUG flag. New code should use NS_WARN_IF(condition) instead!
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* @status deprecated
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*/
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#define NS_ENSURE_TRUE(x, ret) \
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do { \
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if (MOZ_UNLIKELY(!(x))) { \
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NS_WARNING("NS_ENSURE_TRUE(" #x ") failed"); \
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return ret; \
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} \
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} while (false)
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#define NS_ENSURE_FALSE(x, ret) NS_ENSURE_TRUE(!(x), ret)
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#define NS_ENSURE_TRUE_VOID(x) \
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do { \
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if (MOZ_UNLIKELY(!(x))) { \
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NS_WARNING("NS_ENSURE_TRUE(" #x ") failed"); \
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return; \
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} \
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} while (false)
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#define NS_ENSURE_FALSE_VOID(x) NS_ENSURE_TRUE_VOID(!(x))
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/******************************************************************************
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** Macros for checking results
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******************************************************************************/
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#if defined(DEBUG) && !defined(XPCOM_GLUE_AVOID_NSPR)
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# define NS_ENSURE_SUCCESS_BODY(res, ret) \
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const char* name = mozilla::GetStaticErrorName(__rv); \
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mozilla::SmprintfPointer msg = mozilla::Smprintf( \
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"NS_ENSURE_SUCCESS(%s, %s) failed with " \
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"result 0x%" PRIX32 "%s%s%s", \
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#res, #ret, static_cast<uint32_t>(__rv), name ? " (" : "", \
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name ? name : "", name ? ")" : ""); \
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NS_WARNING(msg.get());
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# define NS_ENSURE_SUCCESS_BODY_VOID(res) \
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const char* name = mozilla::GetStaticErrorName(__rv); \
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mozilla::SmprintfPointer msg = mozilla::Smprintf( \
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"NS_ENSURE_SUCCESS_VOID(%s) failed with " \
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"result 0x%" PRIX32 "%s%s%s", \
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#res, static_cast<uint32_t>(__rv), name ? " (" : "", name ? name : "", \
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name ? ")" : ""); \
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NS_WARNING(msg.get());
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#else
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# define NS_ENSURE_SUCCESS_BODY(res, ret) \
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NS_WARNING("NS_ENSURE_SUCCESS(" #res ", " #ret ") failed");
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# define NS_ENSURE_SUCCESS_BODY_VOID(res) \
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NS_WARNING("NS_ENSURE_SUCCESS_VOID(" #res ") failed");
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#endif
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#define NS_ENSURE_SUCCESS(res, ret) \
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do { \
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nsresult __rv = res; /* Don't evaluate |res| more than once */ \
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if (NS_FAILED(__rv)) { \
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NS_ENSURE_SUCCESS_BODY(res, ret) \
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return ret; \
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} \
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} while (false)
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#define NS_ENSURE_SUCCESS_VOID(res) \
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do { \
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nsresult __rv = res; \
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if (NS_FAILED(__rv)) { \
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NS_ENSURE_SUCCESS_BODY_VOID(res) \
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return; \
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} \
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} while (false)
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/******************************************************************************
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** Macros for checking state and arguments upon entering interface boundaries
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******************************************************************************/
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#define NS_ENSURE_ARG(arg) NS_ENSURE_TRUE(arg, NS_ERROR_INVALID_ARG)
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#define NS_ENSURE_ARG_POINTER(arg) NS_ENSURE_TRUE(arg, NS_ERROR_INVALID_POINTER)
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#define NS_ENSURE_ARG_MIN(arg, min) \
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NS_ENSURE_TRUE((arg) >= min, NS_ERROR_INVALID_ARG)
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#define NS_ENSURE_ARG_MAX(arg, max) \
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NS_ENSURE_TRUE((arg) <= max, NS_ERROR_INVALID_ARG)
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#define NS_ENSURE_ARG_RANGE(arg, min, max) \
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NS_ENSURE_TRUE(((arg) >= min) && ((arg) <= max), NS_ERROR_INVALID_ARG)
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#define NS_ENSURE_STATE(state) NS_ENSURE_TRUE(state, NS_ERROR_UNEXPECTED)
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/*****************************************************************************/
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#if (defined(DEBUG) || (defined(NIGHTLY_BUILD) && !defined(MOZ_PROFILING))) && \
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!defined(XPCOM_GLUE_AVOID_NSPR)
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# define MOZ_THREAD_SAFETY_OWNERSHIP_CHECKS_SUPPORTED 1
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#endif
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#ifdef MOZILLA_INTERNAL_API
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void NS_ABORT_OOM(size_t aSize);
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#else
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inline void NS_ABORT_OOM(size_t) { MOZ_CRASH(); }
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#endif
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#endif /* nsDebug_h___ */
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