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26e553d0ed
disable stack overflow check for every stack pushing as default. * vm_exec.c (vm_stack_overflow_for_insn): ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44275 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
182 lines
4 KiB
C
182 lines
4 KiB
C
/**********************************************************************
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vm.h -
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$Author$
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created at: 04/01/01 16:56:59 JST
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Copyright (C) 2004-2007 Koichi Sasada
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**********************************************************************/
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#ifndef RUBY_VM_EXEC_H
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#define RUBY_VM_EXEC_H
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typedef long OFFSET;
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typedef unsigned long lindex_t;
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typedef VALUE GENTRY;
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typedef rb_iseq_t *ISEQ;
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#ifdef __GCC__
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/* TODO: machine dependent prefetch instruction */
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#define PREFETCH(pc)
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#else
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#define PREFETCH(pc)
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#endif
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#if VMDEBUG > 0
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#define debugs printf
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#define DEBUG_ENTER_INSN(insn) \
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rb_vmdebug_debug_print_pre(th, GET_CFP(),GET_PC());
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#if OPT_STACK_CACHING
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#define SC_REGS() , reg_a, reg_b
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#else
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#define SC_REGS()
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#endif
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#define DEBUG_END_INSN() \
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rb_vmdebug_debug_print_post(th, GET_CFP() SC_REGS());
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#else
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#define debugs
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#define DEBUG_ENTER_INSN(insn)
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#define DEBUG_END_INSN()
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#endif
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#define throwdebug if(0)printf
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/* #define throwdebug printf */
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/************************************************/
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#if defined(DISPATCH_XXX)
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error !
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/************************************************/
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#elif OPT_CALL_THREADED_CODE
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#define LABEL(x) insn_func_##x
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#define ELABEL(x)
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#define LABEL_PTR(x) &LABEL(x)
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#define INSN_ENTRY(insn) \
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static rb_control_frame_t * \
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FUNC_FASTCALL(LABEL(insn))(rb_thread_t *th, rb_control_frame_t *reg_cfp) {
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#define END_INSN(insn) return reg_cfp;}
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#define NEXT_INSN() return reg_cfp;
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/************************************************/
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#elif OPT_TOKEN_THREADED_CODE || OPT_DIRECT_THREADED_CODE
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/* threaded code with gcc */
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#define LABEL(x) INSN_LABEL_##x
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#define ELABEL(x) INSN_ELABEL_##x
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#define LABEL_PTR(x) &&LABEL(x)
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#define INSN_ENTRY_SIG(insn)
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#define INSN_DISPATCH_SIG(insn)
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#define INSN_ENTRY(insn) \
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LABEL(insn): \
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INSN_ENTRY_SIG(insn); \
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/* dispatcher */
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#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__)) && __GNUC__ == 3
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#define DISPATCH_ARCH_DEPEND_WAY(addr) \
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__asm__ __volatile__("jmp *%0;\t# -- inserted by vm.h\t[length = 2]" : : "r" (addr))
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#else
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#define DISPATCH_ARCH_DEPEND_WAY(addr) \
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/* do nothing */
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#endif
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/**********************************/
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#if OPT_DIRECT_THREADED_CODE
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/* for GCC 3.4.x */
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#define TC_DISPATCH(insn) \
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INSN_DISPATCH_SIG(insn); \
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goto *(void const *)GET_CURRENT_INSN(); \
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;
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#else
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/* token threaded code */
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#define TC_DISPATCH(insn) \
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DISPATCH_ARCH_DEPEND_WAY(insns_address_table[GET_CURRENT_INSN()]); \
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INSN_DISPATCH_SIG(insn); \
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goto *insns_address_table[GET_CURRENT_INSN()]; \
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rb_bug("tc error");
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#endif /* DISPATCH_DIRECT_THREADED_CODE */
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#define END_INSN(insn) \
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DEBUG_END_INSN(); \
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TC_DISPATCH(insn);
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#define INSN_DISPATCH() \
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TC_DISPATCH(__START__) \
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{
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#define END_INSNS_DISPATCH() \
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rb_bug("unknown insn: %"PRIdVALUE, GET_CURRENT_INSN()); \
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} /* end of while loop */ \
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#define NEXT_INSN() TC_DISPATCH(__NEXT_INSN__)
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/************************************************/
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#else /* no threaded code */
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/* most common method */
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#define INSN_ENTRY(insn) \
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case BIN(insn):
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#define END_INSN(insn) \
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DEBUG_END_INSN(); \
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break;
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#define INSN_DISPATCH() \
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while (1) { \
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switch (GET_CURRENT_INSN()) {
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#define END_INSNS_DISPATCH() \
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default: \
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SDR(); \
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rb_bug("unknown insn: %ld", GET_CURRENT_INSN()); \
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} /* end of switch */ \
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} /* end of while loop */ \
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#define NEXT_INSN() goto first
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#endif
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#define VM_SP_CNT(th, sp) ((sp) - (th)->stack)
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#if OPT_CALL_THREADED_CODE
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#define THROW_EXCEPTION(exc) do { \
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th->errinfo = (VALUE)(exc); \
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return 0; \
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} while (0)
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#else
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#define THROW_EXCEPTION(exc) return (VALUE)(exc)
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#endif
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#define SCREG(r) (reg_##r)
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#define VM_DEBUG_STACKOVERFLOW 0
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#if VM_DEBUG_STACKOVERFLOW
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#define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin) \
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WHEN_VM_STACK_OVERFLOWED(cfp, (cfp)->sp, margin) vm_stack_overflow_for_insn()
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#else
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#define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin)
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#endif
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#endif /* RUBY_VM_EXEC_H */
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