global.h

一个操作系统源代码 用于嵌入式设备 在Vc++环境下仿真 成功移植到多款处理器上

extern bool_t JamRepeat;

/*=========================================================================
 * Macros for controlling global execution tracing modes
 *=======================================================================*/

/* The following isn't really intended to be unreadable, but it simplifies
 * the maintenance of the various execution tracing flags.
 * 
 * NOTE: Logically these operations belong to VmExtra directory,
 * since this code is not useful for those ports that do not support
 * command line operation.  However, since this code is intimately
 * tied with the tracing capabilities of the core KVM, we'll keep
 * these definitions in this file for the time being.
 *
 * The intent is that you can call
 *    FOR_EACH_TRACE_FLAG(Macro_Of_Two_Arguments)
 * where Macro_Of_Two_Arguments is a two-argument macro whose first argument
 * is the name of a variable, and the second argument is the string the user
 * enters to turn on that flag.
 */
#define FOR_EACH_TRACE_FLAG(Macro) \
     FOR_EACH_ORDINARY_TRACE_FLAG(Macro) \
     FOR_EACH_DEBUGGER_TRACE_FLAG(Macro) \
     FOR_EACH_JAM_TRACE_FLAG(Macro) 

/* The ordinary trace flags are those included in any debugging build */
#if INCLUDEDEBUGCODE
#   define FOR_EACH_ORDINARY_TRACE_FLAG(Macro)  \
         Macro(tracememoryallocation,         "-traceallocation") \
         Macro(tracegarbagecollection,        "-tracegc") \
         Macro(tracegarbagecollectionverbose, "-tracegcverbose") \
         Macro(traceclassloading,             "-traceclassloading") \
         Macro(traceclassloadingverbose,      "-traceclassloadingverbose") \
         Macro(traceverifier,                 "-traceverifier") \
         Macro(tracestackmaps,                "-tracestackmaps") \
         Macro(tracebytecodes,                "-tracebytecodes") \
         Macro(tracemethodcalls,              "-tracemethods") \
         Macro(tracemethodcallsverbose,       "-tracemethodsverbose") \
         Macro(tracestackchunks,              "-tracestackchunks") \
         Macro(traceframes,                   "-traceframes") \
         Macro(traceexceptions,               "-traceexceptions") \
         Macro(traceevents,                   "-traceevents") \
         Macro(tracemonitors,                 "-tracemonitors") \
         Macro(tracethreading,                "-tracethreading") \
         Macro(tracenetworking,               "-tracenetworking") 
#else 
#    define FOR_EACH_ORDINARY_TRACE_FLAG(Macro)
#endif

/* The debugger tracing flags are those included only if we support KWDP */
#if INCLUDEDEBUGCODE && ENABLE_JAVA_DEBUGGER
#  define FOR_EACH_DEBUGGER_TRACE_FLAG(Macro)  \
               Macro(tracedebugger, "-tracedebugger") 
#else 
#  define FOR_EACH_DEBUGGER_TRACE_FLAG(Macro)
#endif

/* The debugger tracing flags are those included only if we support KWDP */
#if INCLUDEDEBUGCODE && USE_JAM
#  define FOR_EACH_JAM_TRACE_FLAG(Macro)  \
               Macro(tracejam, "-tracejam") 
#else 
#  define FOR_EACH_JAM_TRACE_FLAG(Macro)
#endif

/* Declare each of the trace flags to be external.  Note that we define
 * a two-variable macro, then use that macro as an argument to
 * FOR_EACH_TRACE_FLAG 
 */

#define DECLARE_TRACE_VAR_EXTERNAL(varName, userName) \
    extern int varName;
FOR_EACH_TRACE_FLAG(DECLARE_TRACE_VAR_EXTERNAL)

/*=========================================================================
 * Most frequently called functions are "inlined" here
 *=======================================================================*/

/*=========================================================================
 * Quick operations for stack manipulation (for manipulating stack
 * frames and operands).
 *=======================================================================*/

#define topStack                        (*getSP())
#define secondStack                     (*(getSP()-1))
#define thirdStack                      (*(getSP()-2))
#define fourthStack                     (*(getSP()-3))

#define topStackAsType(_type_)          (*(_type_ *)(getSP()))
#define secondStackAsType(_type_)       (*(_type_ *)(getSP() - 1))
#define thirdStackAsType(_type_)        (*(_type_ *)(getSP() - 2))
#define fourthStackAsType(_type_)       (*(_type_ *)(getSP() - 3))

#define oneMore                         getSP()++
#define oneLess                         getSP()--
#define moreStack(n)                    getSP() += (n)
#define lessStack(n)                    getSP() -= (n)

#define popStack()                      (*getSP()--)
#define popStackAsType(_type_)          (*(_type_ *)(getSP()--))

#define pushStack(data)                 *++getSP() = (data)
#define pushStackAsType(_type_, data)   *(_type_ *)(++getSP()) = (data)

/*=========================================================================
 * The equivalent macros to the above for use when the stack being
 * manipulated is not for the currently executing thread. In all cases
 * the additional parameter is the THREAD pointer.
 *=======================================================================*/

#define topStackForThread(t)         (*((t)->spStore))
#define secondStackForThread(t)      (*((t)->spStore - 1))
#define thirdStackForThread(t)       (*((t)->spStore - 2))
#define fourthStackForThread(t)      (*((t)->spStore - 3))

#define popStackForThread(t)         (*((t)->spStore--))
#define pushStackForThread(t, data)  (*(++(t)->spStore) = (data))
#define popStackAsTypeForThread(t, _type_) \
                                     (*(_type_*)((t)->spStore--))
#define pushStackAsTypeForThread(t, _type_, data)    \
                                     (*(_type_ *)(++(t)->spStore) = (data))
#define moreStackForThread(t, n)     ((t)->spStore += (n))
#define lessStackForThread(t, n)     ((t)->spStore -= (n))
#define oneMoreForThread(t)          ((t)->spStore++)
#define oneLessForThread(t)          ((t)->spStore--)

#define spForThread(t)               ((t)->spStore)

/*=========================================================================
 * Error handling definitions
 *=======================================================================*/
/*
#ifndef ERROR_TRY
#  include <setjmp.h>
#  define ERROR_TRY  \
    {  jmp_buf *__prev__ = topJumpBuffer;                       \
           int *__prev__value = topJumpBuffer_value;            \
           jmp_buf __jmp_buf__;                                 \
           int __value__;                                       \
       int __state__;                                           \
       topJumpBuffer = &__jmp_buf__;                            \
       topJumpBuffer_value = &__value__;                        \
       if ((__state__ = setjmp(__jmp_buf__)) == 0) {

#  define ERROR_CATCH(var)                                      \
        }                                                       \
        topJumpBuffer = __prev__;                               \
        topJumpBuffer_value = __prev__value;                    \
        if (__state__ != 0) {                                   \
            long var = __value__;

#  define ERROR_END_CATCH     } }

#  define ERROR_THROW(i)                                        \
        *topJumpBuffer_value = i;                               \
        longjmp(*topJumpBuffer, i)

extern jmp_buf *topJumpBuffer;
extern int     *topJumpBuffer_value;

#define NEED_GLOBAL_JUMPBUFFER 1
#endif /* ERROR_TRY */
#define MB_CUR_MAX 2
#define ERROR_TRY
#define ERROR_END_CATCH
 #  define ERROR_THROW(i) 
 #  define ERROR_CATCH(var) 

#ifndef FATAL_ERROR_EXIT_CODE
#define FATAL_ERROR_EXIT_CODE 127
#endif

/*=========================================================================
 * Operations for handling memory fetches and stores
 *=======================================================================*/

/*=========================================================================
 * These macros define Java-specific memory read/write operations
 * for reading high-endian numbers.
 *=======================================================================*/

/* Get a 32-bit value from the given memory location */
#define getCell(addr) \
                  ((((long)(((unsigned char *)(addr))[0])) << 24) |  \
                   (((long)(((unsigned char *)(addr))[1])) << 16) |  \
                   (((long)(((unsigned char *)(addr))[2])) << 8)  |  \
                   (((long)(((unsigned char *)(addr))[3])) << 0)) 

#if BIG_ENDIAN
#define getAlignedCell(addr) (*(long *)(addr))
#else 
#define getAlignedCell(addr) getCell(addr)
#endif

/* Get an unsigned 16-bit value from the given memory location */
#define getUShort(addr) \
                  ((((unsigned short)(((unsigned char *)(addr))[0])) << 8)  | \
                   (((unsigned short)(((unsigned char *)(addr))[1])) << 0))

/* Get a 16-bit value from the given memory location */
#define getShort(addr) ((short)(getUShort(addr)))

/* Store a 16-bit value in the given memory location */ 
#define putShort(addr, value) \
              ((unsigned char *)(addr))[0] = (unsigned char)((value) >> 8); \
              ((unsigned char *)(addr))[1] = (unsigned char)((value) & 0xFF)