mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-11-30 13:20:30 +00:00
147 lines
7.5 KiB
C++
147 lines
7.5 KiB
C++
// trap.h - written and placed in public domain by Jeffrey Walton.
|
|
// Copyright assigned to Crypto++ project
|
|
|
|
//! \file trap.h
|
|
//! \brief Debugging and diagnostic assertions
|
|
//! \details <tt>CRYPTOPP_ASSERT</tt> is the library's debugging and diagnostic assertion. <tt>CRYPTOPP_ASSERT</tt>
|
|
//! is enabled by <tt>CRYPTOPP_DEBUG</tt>, <tt>DEBUG</tt> or <tt>_DEBUG</tt>.
|
|
//! \details <tt>CRYPTOPP_ASSERT</tt> raises a <tt>SIGTRAP</tt> (Unix) or calls <tt>__debugbreak()</tt> (Windows).
|
|
//! <tt>CRYPTOPP_ASSERT</tt> is only in effect when the user requests a debug configuration. Unlike Posix assert,
|
|
//! <tt>NDEBUG</tt> (or failure to define it) does not affect the library.
|
|
//! The traditional Posix define <tt>NDEBUG</tt> has no effect on <tt>CRYPTOPP_DEBUG</tt> or DebugTrapHandler.
|
|
//! \since Crypto++ 5.6.5
|
|
//! \sa DebugTrapHandler, <A HREF="http://github.com/weidai11/cryptopp/issues/277">Issue 277</A>,
|
|
//! <A HREF="http://seclists.org/oss-sec/2016/q3/520">CVE-2016-7420</A>
|
|
|
|
#ifndef CRYPTOPP_TRAP_H
|
|
#define CRYPTOPP_TRAP_H
|
|
|
|
#include "config.h"
|
|
|
|
#if defined(CRYPTOPP_DEBUG)
|
|
# include <iostream>
|
|
# include <sstream>
|
|
# if defined(UNIX_SIGNALS_AVAILABLE)
|
|
# include "ossig.h"
|
|
# elif defined(CRYPTOPP_WIN32_AVAILABLE) && !defined(__CYGWIN__)
|
|
# if (_MSC_VER >= 1400)
|
|
# include <intrin.h>
|
|
# endif
|
|
# endif
|
|
#endif // CRYPTOPP_DEBUG
|
|
|
|
// ************** run-time assertion ***************
|
|
|
|
#if defined(CRYPTOPP_DOXYGEN_PROCESSING)
|
|
//! \brief Debugging and diagnostic assertion
|
|
//! \details <tt>CRYPTOPP_ASSERT</tt> is the library's debugging and diagnostic assertion. <tt>CRYPTOPP_ASSERT</tt>
|
|
//! is enabled by the preprocessor macros <tt>CRYPTOPP_DEBUG</tt>, <tt>DEBUG</tt> or <tt>_DEBUG</tt>.
|
|
//! \details <tt>CRYPTOPP_ASSERT</tt> raises a <tt>SIGTRAP</tt> (Unix) or calls <tt>DebugBreak()</tt> (Windows).
|
|
//! <tt>CRYPTOPP_ASSERT</tt> is only in effect when the user explictly requests a debug configuration.
|
|
//! \details If you want to ensure <tt>CRYPTOPP_ASSERT</tt> is inert, then <em>do not</em> define
|
|
//! <tt>CRYPTOPP_DEBUG</tt>, <tt>DEBUG</tt> or <tt>_DEBUG</tt>. Avoiding the defines means <tt>CRYPTOPP_ASSERT</tt>
|
|
//! is processed into <tt>((void)(exp))</tt>.
|
|
//! \details The traditional Posix define <tt>NDEBUG</tt> has no effect on <tt>CRYPTOPP_DEBUG</tt>, <tt>CRYPTOPP_ASSERT</tt>
|
|
//! or DebugTrapHandler.
|
|
//! \details An example of using \ref CRYPTOPP_ASSERT "CRYPTOPP_ASSERT" and DebugTrapHandler is shown below. The library's
|
|
//! test program, <tt>cryptest.exe</tt> (from test.cpp), exercises the structure:
|
|
//! <pre>
|
|
//! #if defined(CRYPTOPP_DEBUG) && defined(UNIX_SIGNALS_AVAILABLE)
|
|
//! static const DebugTrapHandler g_dummyHandler;
|
|
//! #endif
|
|
//!
|
|
//! int main(int argc, char* argv[])
|
|
//! {
|
|
//! CRYPTOPP_ASSERT(argv != nullptr);
|
|
//! ...
|
|
//! }
|
|
//! </pre>
|
|
//! \since Crypto++ 5.6.5
|
|
//! \sa DebugTrapHandler, SignalHandler, <A HREF="http://github.com/weidai11/cryptopp/issues/277">Issue 277</A>,
|
|
//! <A HREF="http://seclists.org/oss-sec/2016/q3/520">CVE-2016-7420</A>
|
|
# define CRYPTOPP_ASSERT(exp) { ... }
|
|
#endif
|
|
|
|
#if defined(CRYPTOPP_DEBUG) && defined(UNIX_SIGNALS_AVAILABLE)
|
|
# define CRYPTOPP_ASSERT(exp) { \
|
|
if (!(exp)) { \
|
|
std::ostringstream oss; \
|
|
oss << "Assertion failed: " << (char*)(__FILE__) << "(" \
|
|
<< (int)(__LINE__) << "): " << (char*)(__func__) \
|
|
<< std::endl; \
|
|
std::cerr << oss.str(); \
|
|
raise(SIGTRAP); \
|
|
} \
|
|
}
|
|
#elif CRYPTOPP_DEBUG && defined(CRYPTOPP_WIN32_AVAILABLE) && !defined(__CYGWIN__)
|
|
# define CRYPTOPP_ASSERT(exp) { \
|
|
if (!(exp)) { \
|
|
std::ostringstream oss; \
|
|
oss << "Assertion failed: " << (char*)(__FILE__) << "(" \
|
|
<< (int)(__LINE__) << "): " << (char*)(__FUNCTION__) \
|
|
<< std::endl; \
|
|
std::cerr << oss.str(); \
|
|
__debugbreak(); \
|
|
} \
|
|
}
|
|
#endif // DEBUG and Unix or Windows
|
|
|
|
// Remove CRYPTOPP_ASSERT in non-debug builds.
|
|
// Can't use CRYPTOPP_UNUSED due to circular dependency
|
|
#ifndef CRYPTOPP_ASSERT
|
|
# define CRYPTOPP_ASSERT(exp) ((void)0)
|
|
#endif
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
// ************** SIGTRAP handler ***************
|
|
|
|
#if (CRYPTOPP_DEBUG && defined(UNIX_SIGNALS_AVAILABLE)) || defined(CRYPTOPP_DOXYGEN_PROCESSING)
|
|
//! \brief Default SIGTRAP handler
|
|
//! \details DebugTrapHandler() can be used by a program to install an empty SIGTRAP handler. If present,
|
|
//! the handler ensures there is a signal handler in place for <tt>SIGTRAP</tt> raised by
|
|
//! <tt>CRYPTOPP_ASSERT</tt>. If <tt>CRYPTOPP_ASSERT</tt> raises <tt>SIGTRAP</tt> <em>without</em>
|
|
//! a handler, then one of two things can occur. First, the OS might allow the program
|
|
//! to continue. Second, the OS might terminate the program. OS X allows the program to continue, while
|
|
//! some Linuxes terminate the program.
|
|
//! \details If DebugTrapHandler detects another handler in place, then it will not install a handler. This
|
|
//! ensures a debugger can gain control of the <tt>SIGTRAP</tt> signal without contention. It also allows multiple
|
|
//! DebugTrapHandler to be created without contentious or unusual behavior. Though muliple DebugTrapHandler can be
|
|
//! created, a program should only create one, if needed.
|
|
//! \details A DebugTrapHandler is subject to C++ static initialization [dis]order. If you need to install a handler
|
|
//! and it must be installed early, then reference the code associated with <tt>CRYPTOPP_INIT_PRIORITY</tt> in
|
|
//! cryptlib.cpp and cpu.cpp.
|
|
//! \details If you want to ensure <tt>CRYPTOPP_ASSERT</tt> is inert, then <em>do not</em> define
|
|
//! <tt>CRYPTOPP_DEBUG</tt>, <tt>DEBUG</tt> or <tt>_DEBUG</tt>. Avoiding the defines means <tt>CRYPTOPP_ASSERT</tt>
|
|
//! is processed into <tt>((void)(exp))</tt>.
|
|
//! \details The traditional Posix define <tt>NDEBUG</tt> has no effect on <tt>CRYPTOPP_DEBUG</tt>, <tt>CRYPTOPP_ASSERT</tt>
|
|
//! or DebugTrapHandler.
|
|
//! \details An example of using \ref CRYPTOPP_ASSERT "CRYPTOPP_ASSERT" and DebugTrapHandler is shown below. The library's
|
|
//! test program, <tt>cryptest.exe</tt> (from test.cpp), exercises the structure:
|
|
//! <pre>
|
|
//! #if defined(CRYPTOPP_DEBUG) && defined(UNIX_SIGNALS_AVAILABLE)
|
|
//! static const DebugTrapHandler g_dummyHandler;
|
|
//! #endif
|
|
//!
|
|
//! int main(int argc, char* argv[])
|
|
//! {
|
|
//! CRYPTOPP_ASSERT(argv != nullptr);
|
|
//! ...
|
|
//! }
|
|
//! </pre>
|
|
//! \since Crypto++ 5.6.5
|
|
//! \sa \ref CRYPTOPP_ASSERT "CRYPTOPP_ASSERT", SignalHandler, <A HREF="http://github.com/weidai11/cryptopp/issues/277">Issue 277</A>,
|
|
//! <A HREF="http://seclists.org/oss-sec/2016/q3/520">CVE-2016-7420</A>
|
|
|
|
#if defined(CRYPTOPP_DOXYGEN_PROCESSING)
|
|
class DebugTrapHandler : public SignalHandler<SIGILL, false> { };
|
|
#else
|
|
typedef SignalHandler<SIGILL, false> DebugTrapHandler;
|
|
#endif
|
|
|
|
#endif // Linux, Unix and Documentation
|
|
|
|
NAMESPACE_END
|
|
|
|
#endif // CRYPTOPP_TRAP_H
|