[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Emacs-diffs] Changes to emacs/gc/include/private/gcconfig.h [Boehm-ver
|
From: |
Dave Love |
|
Subject: |
[Emacs-diffs] Changes to emacs/gc/include/private/gcconfig.h [Boehm-versions] |
|
Date: |
Mon, 16 Jun 2003 11:20:00 -0400 |
Index: emacs/gc/include/private/gcconfig.h
diff -c /dev/null emacs/gc/include/private/gcconfig.h:1.2.2.1.2.1
*** /dev/null Mon Jun 16 11:20:00 2003
--- emacs/gc/include/private/gcconfig.h Mon Jun 16 11:19:53 2003
***************
*** 0 ****
--- 1,2114 ----
+ /*
+ * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
+ * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
+ * Copyright (c) 1996 by Silicon Graphics. All rights reserved.
+ * Copyright (c) 2000 by Hewlett-Packard Company. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+
+ /*
+ * This header is private to the gc. It is almost always included from
+ * gc_priv.h. However it is possible to include it by itself if just the
+ * configuration macros are needed. In that
+ * case, a few declarations relying on types declared in gc_priv.h will be
+ * omitted.
+ */
+
+ #ifndef GCCONFIG_H
+
+ # define GCCONFIG_H
+
+ # ifndef GC_PRIVATE_H
+ /* Fake ptr_t declaration, just to avoid compilation errors. */
+ /* This avoids many instances if "ifndef GC_PRIVATE_H" below. */
+ typedef struct GC_undefined_struct * ptr_t;
+ # endif
+
+ /* Machine dependent parameters. Some tuning parameters can be found */
+ /* near the top of gc_private.h. */
+
+ /* Machine specific parts contributed by various people. See README file. */
+
+ /* First a unified test for Linux: */
+ # if defined(linux) || defined(__linux__)
+ # ifndef LINUX
+ # define LINUX
+ # endif
+ # endif
+
+ /* And one for NetBSD: */
+ # if defined(__NetBSD__)
+ # define NETBSD
+ # endif
+
+ /* And one for OpenBSD: */
+ # if defined(__OpenBSD__)
+ # define OPENBSD
+ # endif
+
+ /* And one for FreeBSD: */
+ # if defined(__FreeBSD__)
+ # define FREEBSD
+ # endif
+
+ /* Determine the machine type: */
+ # if defined(__XSCALE__)
+ # define ARM32
+ # if !defined(LINUX)
+ # define NOSYS
+ # define mach_type_known
+ # endif
+ # endif
+ # if defined(sun) && defined(mc68000)
+ # define M68K
+ # define SUNOS4
+ # define mach_type_known
+ # endif
+ # if defined(hp9000s300)
+ # define M68K
+ # define HP
+ # define mach_type_known
+ # endif
+ # if defined(OPENBSD) && defined(m68k)
+ # define M68K
+ # define mach_type_known
+ # endif
+ # if defined(OPENBSD) && defined(__sparc__)
+ # define SPARC
+ # define mach_type_known
+ # endif
+ # if defined(NETBSD) && defined(m68k)
+ # define M68K
+ # define mach_type_known
+ # endif
+ # if defined(NETBSD) && defined(__powerpc__)
+ # define POWERPC
+ # define mach_type_known
+ # endif
+ # if defined(NETBSD) && defined(__arm32__)
+ # define ARM32
+ # define mach_type_known
+ # endif
+ # if defined(vax)
+ # define VAX
+ # ifdef ultrix
+ # define ULTRIX
+ # else
+ # define BSD
+ # endif
+ # define mach_type_known
+ # endif
+ # if defined(mips) || defined(__mips) || defined(_mips)
+ # define MIPS
+ # if defined(nec_ews) || defined(_nec_ews)
+ # define EWS4800
+ # endif
+ # if !defined(LINUX) && !defined(EWS4800)
+ # if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
+ # define ULTRIX
+ # else
+ # if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \
+ || defined(__SYSTYPE_SVR4__)
+ # define IRIX5 /* or IRIX 6.X */
+ # else
+ # define RISCOS /* or IRIX 4.X */
+ # endif
+ # endif
+ # endif /* !LINUX */
+ # if defined(__NetBSD__) && defined(__MIPSEL__)
+ # undef ULTRIX
+ # endif
+ # define mach_type_known
+ # endif
+ # if defined(DGUX) && (defined(i386) || defined(__i386__))
+ # define I386
+ # ifndef _USING_DGUX
+ # define _USING_DGUX
+ # endif
+ # define mach_type_known
+ # endif
+ # if defined(sequent) && (defined(i386) || defined(__i386__))
+ # define I386
+ # define SEQUENT
+ # define mach_type_known
+ # endif
+ # if defined(sun) && (defined(i386) || defined(__i386__))
+ # define I386
+ # define SUNOS5
+ # define mach_type_known
+ # endif
+ # if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
+ # define I386
+ # define OS2
+ # define mach_type_known
+ # endif
+ # if defined(ibm032)
+ # define RT
+ # define mach_type_known
+ # endif
+ # if defined(sun) && (defined(sparc) || defined(__sparc))
+ # define SPARC
+ /* Test for SunOS 5.x */
+ # include <errno.h>
+ # ifdef ECHRNG
+ # define SUNOS5
+ # else
+ # define SUNOS4
+ # endif
+ # define mach_type_known
+ # endif
+ # if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
+ && !defined(__OpenBSD__) && !(__NetBSD__)
+ # define SPARC
+ # define DRSNX
+ # define mach_type_known
+ # endif
+ # if defined(_IBMR2)
+ # define RS6000
+ # define mach_type_known
+ # endif
+ # if defined(__NetBSD__) && defined(__sparc__)
+ # define SPARC
+ # define mach_type_known
+ # endif
+ # if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
+ /* The above test may need refinement */
+ # define I386
+ # if defined(_SCO_ELF)
+ # define SCO_ELF
+ # else
+ # define SCO
+ # endif
+ # define mach_type_known
+ # endif
+ # if defined(_AUX_SOURCE)
+ # define M68K
+ # define SYSV
+ # define mach_type_known
+ # endif
+ # if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
+ || defined(hppa) || defined(__hppa__)
+ # define HP_PA
+ # ifndef LINUX
+ # define HPUX
+ # endif
+ # define mach_type_known
+ # endif
+ # if defined(__ia64) && defined(_HPUX_SOURCE)
+ # define IA64
+ # define HPUX
+ # define mach_type_known
+ # endif
+ # if defined(__BEOS__) && defined(_X86_)
+ # define I386
+ # define BEOS
+ # define mach_type_known
+ # endif
+ # if defined(LINUX) && (defined(i386) || defined(__i386__))
+ # define I386
+ # define mach_type_known
+ # endif
+ # if defined(LINUX) && defined(__x86_64__)
+ # define X86_64
+ # define mach_type_known
+ # endif
+ # if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
+ # define IA64
+ # define mach_type_known
+ # endif
+ # if defined(LINUX) && defined(__arm__)
+ # define ARM32
+ # define mach_type_known
+ # endif
+ # if defined(LINUX) && (defined(powerpc) || defined(__powerpc__) ||
defined(powerpc64) || defined(__powerpc64__))
+ # define POWERPC
+ # define mach_type_known
+ # endif
+ # if defined(LINUX) && defined(__mc68000__)
+ # define M68K
+ # define mach_type_known
+ # endif
+ # if defined(LINUX) && (defined(sparc) || defined(__sparc__))
+ # define SPARC
+ # define mach_type_known
+ # endif
+ # if defined(LINUX) && defined(__arm__)
+ # define ARM32
+ # define mach_type_known
+ # endif
+ # if defined(LINUX) && defined(__sh__)
+ # define SH
+ # define mach_type_known
+ # endif
+ # if defined(__alpha) || defined(__alpha__)
+ # define ALPHA
+ # if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) &&
!defined(FREEBSD)
+ # define OSF1 /* a.k.a Digital Unix */
+ # endif
+ # define mach_type_known
+ # endif
+ # if defined(_AMIGA) && !defined(AMIGA)
+ # define AMIGA
+ # endif
+ # ifdef AMIGA
+ # define M68K
+ # define mach_type_known
+ # endif
+ # if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)
+ # define M68K
+ # define MACOS
+ # define mach_type_known
+ # endif
+ # if defined(__MWERKS__) && defined(__powerc) && !defined(__MACH__)
+ # define POWERPC
+ # define MACOS
+ # define mach_type_known
+ # endif
+ # if defined(macosx) || \
+ defined(__APPLE__) && defined(__MACH__) && defined(__ppc__)
+ # define DARWIN
+ # define POWERPC
+ # define mach_type_known
+ # endif
+ # if defined(__APPLE__) && defined(__MACH__) && defined(__i386__)
+ # define DARWIN
+ # define I386
+ --> Not really supported, but at least we recognize it.
+ # endif
+ # if defined(NeXT) && defined(mc68000)
+ # define M68K
+ # define NEXT
+ # define mach_type_known
+ # endif
+ # if defined(NeXT) && (defined(i386) || defined(__i386__))
+ # define I386
+ # define NEXT
+ # define mach_type_known
+ # endif
+ # if defined(__OpenBSD__) && (defined(i386) || defined(__i386__))
+ # define I386
+ # define OPENBSD
+ # define mach_type_known
+ # endif
+ # if defined(FREEBSD) && (defined(i386) || defined(__i386__))
+ # define I386
+ # define mach_type_known
+ # endif
+ # if defined(__NetBSD__) && (defined(i386) || defined(__i386__))
+ # define I386
+ # define mach_type_known
+ # endif
+ # if defined(bsdi) && (defined(i386) || defined(__i386__))
+ # define I386
+ # define BSDI
+ # define mach_type_known
+ # endif
+ # if !defined(mach_type_known) && defined(__386BSD__)
+ # define I386
+ # define THREE86BSD
+ # define mach_type_known
+ # endif
+ # if defined(_CX_UX) && defined(_M88K)
+ # define M88K
+ # define CX_UX
+ # define mach_type_known
+ # endif
+ # if defined(DGUX) && defined(m88k)
+ # define M88K
+ /* DGUX defined */
+ # define mach_type_known
+ # endif
+ # if defined(_WIN32_WCE)
+ /* SH3, SH4, MIPS already defined for corresponding architectures */
+ # if defined(SH3) || defined(SH4)
+ # define SH
+ # endif
+ # if defined(x86)
+ # define I386
+ # endif
+ # if defined(ARM)
+ # define ARM32
+ # endif
+ # define MSWINCE
+ # define mach_type_known
+ # else
+ # if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
+ || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
+ # define I386
+ # define MSWIN32 /* or Win32s */
+ # define mach_type_known
+ # endif
+ # endif
+ # if defined(__DJGPP__)
+ # define I386
+ # ifndef DJGPP
+ # define DJGPP /* MSDOS running the DJGPP port of GCC */
+ # endif
+ # define mach_type_known
+ # endif
+ # if defined(__CYGWIN32__) || defined(__CYGWIN__)
+ # define I386
+ # define CYGWIN32
+ # define mach_type_known
+ # endif
+ # if defined(__MINGW32__)
+ # define I386
+ # define MSWIN32
+ # define mach_type_known
+ # endif
+ # if defined(__BORLANDC__)
+ # define I386
+ # define MSWIN32
+ # define mach_type_known
+ # endif
+ # if defined(_UTS) && !defined(mach_type_known)
+ # define S370
+ # define UTS4
+ # define mach_type_known
+ # endif
+ # if defined(__pj__)
+ # define PJ
+ # define mach_type_known
+ # endif
+ # if defined(__embedded__) && defined(PPC)
+ # define POWERPC
+ # define NOSYS
+ # define mach_type_known
+ # endif
+ /* Ivan Demakov */
+ # if defined(__WATCOMC__) && defined(__386__)
+ # define I386
+ # if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
+ # if defined(__OS2__)
+ # define OS2
+ # else
+ # if defined(__WINDOWS_386__) || defined(__NT__)
+ # define MSWIN32
+ # else
+ # define DOS4GW
+ # endif
+ # endif
+ # endif
+ # define mach_type_known
+ # endif
+ # if defined(__s390__) && defined(LINUX)
+ # define S390
+ # define mach_type_known
+ # endif
+ # if defined(__GNU__)
+ # if defined(__i386__)
+ /* The Debian Hurd running on generic PC */
+ # define HURD
+ # define I386
+ # define mach_type_known
+ # endif
+ # endif
+
+ /* Feel free to add more clauses here */
+
+ /* Or manually define the machine type here. A machine type is */
+ /* characterized by the architecture. Some */
+ /* machine types are further subdivided by OS.
*/
+ /* the macros ULTRIX, RISCOS, and BSD to distinguish. */
+ /* Note that SGI IRIX is treated identically to RISCOS.
*/
+ /* SYSV on an M68K actually means A/UX.
*/
+ /* The distinction in these cases is usually the stack starting address */
+ # ifndef mach_type_known
+ --> unknown machine type
+ # endif
+ /* Mapping is: M68K ==> Motorola 680X0 */
+ /* (SUNOS4,HP,NEXT, and SYSV (A/UX), */
+ /* MACOS and AMIGA variants) */
+ /* I386 ==> Intel 386 */
+ /* (SEQUENT, OS2, SCO, LINUX, NETBSD, */
+ /* FREEBSD, THREE86BSD, MSWIN32, */
+ /* BSDI,SUNOS5, NEXT, other variants) */
+ /* NS32K ==> Encore Multimax */
+ /* MIPS ==> R2000 or R3000 */
+ /* (RISCOS, ULTRIX variants)
*/
+ /* VAX ==> DEC VAX
*/
+ /* (BSD, ULTRIX variants)
*/
+ /* RS6000 ==> IBM RS/6000 AIX3.X
*/
+ /* RT ==> IBM PC/RT
*/
+ /* HP_PA ==> HP9000/700 & /800
*/
+ /* HP/UX, LINUX
*/
+ /* SPARC ==> SPARC v7/v8/v9 */
+ /* (SUNOS4, SUNOS5, LINUX, */
+ /* DRSNX variants) */
+ /* ALPHA ==> DEC Alpha */
+ /* (OSF1 and LINUX variants) */
+ /* M88K ==> Motorola 88XX0 */
+ /* (CX_UX and DGUX) */
+ /* S370 ==> 370-like machine */
+ /* running Amdahl UTS4 */
+ /* S390 ==> 390-like machine */
+ /* running LINUX */
+ /* ARM32 ==> Intel StrongARM */
+ /* IA64 ==> Intel IPF */
+ /* (e.g. Itanium) */
+ /* (LINUX and HPUX) */
+ /* SH ==> Hitachi SuperH */
+ /* (LINUX & MSWINCE) */
+ /* X86_64 ==> AMD x86-64 */
+ /* POWERPC ==> IBM/Apple PowerPC */
+ /* (MACOS(<=9),DARWIN(incl.MACOSX),*/
+ /* LINUX, NETBSD, NOSYS variants) */
+
+
+ /*
+ * For each architecture and OS, the following need to be defined:
+ *
+ * CPP_WORD_SZ is a simple integer constant representing the word size.
+ * in bits. We assume byte addressibility, where a byte has 8 bits.
+ * We also assume CPP_WORD_SZ is either 32 or 64.
+ * (We care about the length of pointers, not hardware
+ * bus widths. Thus a 64 bit processor with a C compiler that uses
+ * 32 bit pointers should use CPP_WORD_SZ of 32, not 64. Default is 32.)
+ *
+ * MACH_TYPE is a string representation of the machine type.
+ * OS_TYPE is analogous for the OS.
+ *
+ * ALIGNMENT is the largest N, such that
+ * all pointer are guaranteed to be aligned on N byte boundaries.
+ * defining it to be 1 will always work, but perform poorly.
+ *
+ * DATASTART is the beginning of the data segment.
+ * On some platforms SEARCH_FOR_DATA_START is defined.
+ * SEARCH_FOR_DATASTART will cause GC_data_start to
+ * be set to an address determined by accessing data backwards from _end
+ * until an unmapped page is found. DATASTART will be defined to be
+ * GC_data_start.
+ * On UNIX-like systems, the collector will scan the area between DATASTART
+ * and DATAEND for root pointers.
+ *
+ * DATAEND, if not `end' where `end' is defined as ``extern int end[];''.
+ * RTH suggests gaining access to linker script synth'd values with
+ * this idiom instead of `&end' where `end' is defined as ``extern int end;''
.
+ *
+ * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice
+ * the pointer size.
+ *
+ * STACKBOTTOM is the cool end of the stack, which is usually the
+ * highest address in the stack.
+ * Under PCR or OS/2, we have other ways of finding thread stacks.
+ * For each machine, the following should:
+ * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
+ * 2) define exactly one of
+ * STACKBOTTOM (should be defined to be an expression)
+ * LINUX_STACKBOTTOM
+ * HEURISTIC1
+ * HEURISTIC2
+ * If STACKBOTTOM is defined, then it's value will be used directly as the
+ * stack base. If LINUX_STACKBOTTOM is defined, then it will be determined
+ * with a method appropriate for most Linux systems. Currently we look
+ * first for __libc_stack_end, and if that fails read it from /proc.
+ * If either of the last two macros are defined, then STACKBOTTOM is computed
+ * during collector startup using one of the following two heuristics:
+ * HEURISTIC1: Take an address inside GC_init's frame, and round it up to
+ * the next multiple of STACK_GRAN.
+ * HEURISTIC2: Take an address inside GC_init's frame, increment it
repeatedly
+ * in small steps (decrement if STACK_GROWS_UP), and read the value
+ * at each location. Remember the value when the first
+ * Segmentation violation or Bus error is signalled. Round that
+ * to the nearest plausible page boundary, and use that instead
+ * of STACKBOTTOM.
+ *
+ * Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines,
+ * the value of environ is a pointer that can serve as STACKBOTTOM.
+ * I expect that HEURISTIC2 can be replaced by this approach, which
+ * interferes far less with debugging. However it has the disadvantage
+ * that it's confused by a putenv call before the collector is initialized.
+ * This could be dealt with by intercepting putenv ...
+ *
+ * If no expression for STACKBOTTOM can be found, and neither of the above
+ * heuristics are usable, the collector can still be used with all of the
above
+ * undefined, provided one of the following is done:
+ * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
+ * without reference to STACKBOTTOM. This is appropriate for use in
+ * conjunction with thread packages, since there will be multiple stacks.
+ * (Allocating thread stacks in the heap, and treating them as ordinary
+ * heap data objects is also possible as a last resort. However, this is
+ * likely to introduce significant amounts of excess storage retention
+ * unless the dead parts of the thread stacks are periodically cleared.)
+ * 2) Client code may set GC_stackbottom before calling any GC_ routines.
+ * If the author of the client code controls the main program, this is
+ * easily accomplished by introducing a new main program, setting
+ * GC_stackbottom to the address of a local variable, and then calling
+ * the original main program. The new main program would read something
+ * like:
+ *
+ * # include "gc_private.h"
+ *
+ * main(argc, argv, envp)
+ * int argc;
+ * char **argv, **envp;
+ * {
+ * int dummy;
+ *
+ * GC_stackbottom = (ptr_t)(&dummy);
+ * return(real_main(argc, argv, envp));
+ * }
+ *
+ *
+ * Each architecture may also define the style of virtual dirty bit
+ * implementation to be used:
+ * MPROTECT_VDB: Write protect the heap and catch faults.
+ * PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
+ *
+ * An architecture may define DYNAMIC_LOADING if dynamic_load.c
+ * defined GC_register_dynamic_libraries() for the architecture.
+ *
+ * An architecture may define PREFETCH(x) to preload the cache with *x.
+ * This defaults to a no-op.
+ *
+ * PREFETCH_FOR_WRITE(x) is used if *x is about to be written.
+ *
+ * An architecture may also define CLEAR_DOUBLE(x) to be a fast way to
+ * clear the two words at GC_malloc-aligned address x. By default,
+ * word stores of 0 are used instead.
+ *
+ * HEAP_START may be defined as the initial address hint for mmap-based
+ * allocation.
+ */
+
+ /* If we are using a recent version of gcc, we can use __builtin_unwind_init()
+ * to push the relevant registers onto the stack. This generally makes
+ * USE_GENERIC_PUSH_REGS the preferred approach for marking from registers.
+ */
+ # if defined(__GNUC__) && ((__GNUC__ >= 3) || \
+ (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
+ # define HAVE_BUILTIN_UNWIND_INIT
+ # endif
+
+ # define STACK_GRAN 0x1000000
+ # ifdef M68K
+ # define MACH_TYPE "M68K"
+ # define ALIGNMENT 2
+ # ifdef OPENBSD
+ # define OS_TYPE "OPENBSD"
+ # define HEURISTIC2
+ extern char etext[];
+ # define DATASTART ((ptr_t)(etext))
+ # endif
+ # ifdef NETBSD
+ # define OS_TYPE "NETBSD"
+ # define HEURISTIC2
+ extern char etext[];
+ # define DATASTART ((ptr_t)(etext))
+ # endif
+ # ifdef LINUX
+ # define OS_TYPE "LINUX"
+ # define STACKBOTTOM ((ptr_t)0xf0000000)
+ /* # define MPROTECT_VDB - Reported to not work 9/17/01 */
+ # ifdef __ELF__
+ # define DYNAMIC_LOADING
+ # include <features.h>
+ # if defined(__GLIBC__)&& __GLIBC__>=2
+ # define SEARCH_FOR_DATA_START
+ # else /* !GLIBC2 */
+ extern char **__environ;
+ # define DATASTART ((ptr_t)(&__environ))
+ /* hideous kludge: __environ is the first */
+ /* word in crt0.o, and delimits the start */
+ /* of the data segment, no matter which */
+ /* ld options were passed through. */
+ /* We could use _etext instead, but that */
+ /* would include .rodata, which may */
+ /* contain large read-only data tables */
+ /* that we'd rather not scan. */
+ # endif /* !GLIBC2 */
+ extern int _end[];
+ # define DATAEND (_end)
+ # else
+ extern int etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+ # endif
+ # endif
+ # ifdef SUNOS4
+ # define OS_TYPE "SUNOS4"
+ extern char etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0x1ffff) & ~0x1ffff))
+ # define HEURISTIC1 /* differs */
+ # define DYNAMIC_LOADING
+ # endif
+ # ifdef HP
+ # define OS_TYPE "HP"
+ extern char etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+ # define STACKBOTTOM ((ptr_t) 0xffeffffc)
+ /* empirically determined. seems to work. */
+ # include <unistd.h>
+ # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
+ # endif
+ # ifdef SYSV
+ # define OS_TYPE "SYSV"
+ extern etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
+ & ~0x3fffff) \
+ +((word)etext & 0x1fff))
+ /* This only works for shared-text binaries with magic number 0413.
+ The other sorts of SysV binaries put the data at the end of the text,
+ in which case the default of etext would work. Unfortunately,
+ handling both would require having the magic-number available.
+ -- Parag
+ */
+ # define STACKBOTTOM ((ptr_t)0xFFFFFFFE)
+ /* The stack starts at the top of memory, but */
+ /* 0x0 cannot be used as setjump_test complains */
+ /* that the stack direction is incorrect. Two */
+ /* bytes down from 0x0 should be safe enough. */
+ /* --Parag */
+ # include <sys/mmu.h>
+ # define GETPAGESIZE() PAGESIZE /* Is this still right? */
+ # endif
+ # ifdef AMIGA
+ # define OS_TYPE "AMIGA"
+ /* STACKBOTTOM and DATASTART handled specially */
+ /* in os_dep.c */
+ # define DATAEND /* not needed */
+ # define GETPAGESIZE() 4096
+ # endif
+ # ifdef MACOS
+ # ifndef __LOWMEM__
+ # include <LowMem.h>
+ # endif
+ # define OS_TYPE "MACOS"
+ /* see os_dep.c for details of global data segments. */
+ # define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
+ # define DATAEND /* not needed */
+ # define GETPAGESIZE() 4096
+ # endif
+ # ifdef NEXT
+ # define OS_TYPE "NEXT"
+ # define DATASTART ((ptr_t) get_etext())
+ # define STACKBOTTOM ((ptr_t) 0x4000000)
+ # define DATAEND /* not needed */
+ # endif
+ # endif
+
+ # ifdef POWERPC
+ # define MACH_TYPE "POWERPC"
+ # ifdef MACOS
+ # define ALIGNMENT 2 /* Still necessary? Could it be 4? */
+ # ifndef __LOWMEM__
+ # include <LowMem.h>
+ # endif
+ # define OS_TYPE "MACOS"
+ /* see os_dep.c for details of global data segments. */
+ # define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
+ # define DATAEND /* not needed */
+ # endif
+ # ifdef LINUX
+ # if (defined (powerpc64) || defined(__powerpc64__))
+ # define ALIGNMENT 8
+ # define CPP_WORDSZ 64
+ # else
+ # define ALIGNMENT 4 /* Guess. Can someone verify? */
+ /* This was 2, but that didn't sound right. */
+ # endif
+ # define OS_TYPE "LINUX"
+ /* HEURISTIC1 has been reliably reported to fail for a 32-bit */
+ /* executable on a 64 bit kernel.
*/
+ # define LINUX_STACKBOTTOM
+ # define DYNAMIC_LOADING
+ # define SEARCH_FOR_DATA_START
+ extern int _end[];
+ # define DATAEND (_end)
+ # endif
+ # ifdef DARWIN
+ # define ALIGNMENT 4
+ # define OS_TYPE "DARWIN"
+ # define DYNAMIC_LOADING
+ /* XXX: see get_end(3), get_etext() and get_end() should not be used.
+ These aren't used when dyld support is enabled (it is by default) */
+ # define DATASTART ((ptr_t) get_etext())
+ # define DATAEND ((ptr_t) get_end())
+ # define STACKBOTTOM ((ptr_t) 0xc0000000)
+ # define USE_MMAP
+ # define USE_MMAP_ANON
+ # define USE_ASM_PUSH_REGS
+ /* This is potentially buggy. It needs more testing. See the comments in
+ os_dep.c */
+ # define MPROTECT_VDB
+ # include <unistd.h>
+ # define GETPAGESIZE() getpagesize()
+ # if defined(USE_PPC_PREFETCH) && defined(__GNUC__)
+ /* The performance impact of prefetches is untested */
+ # define PREFETCH(x) \
+ __asm__ __volatile__ ("dcbt 0,%0" : : "r" ((const void *) (x)))
+ # define PREFETCH_FOR_WRITE(x) \
+ __asm__ __volatile__ ("dcbtst 0,%0" : : "r" ((const void *) (x)))
+ # endif
+ /* There seems to be some issues with trylock hanging on darwin. This
+ should be looked into some more */
+ # define NO_PTHREAD_TRYLOCK
+ # endif
+ # ifdef NETBSD
+ # define ALIGNMENT 4
+ # define OS_TYPE "NETBSD"
+ # define HEURISTIC2
+ extern char etext[];
+ # define DATASTART GC_data_start
+ # define DYNAMIC_LOADING
+ # endif
+ # ifdef NOSYS
+ # define ALIGNMENT 4
+ # define OS_TYPE "NOSYS"
+ extern void __end[], __dso_handle[];
+ # define DATASTART (__dso_handle) /* OK, that's ugly. */
+ # define DATAEND (__end)
+ /* Stack starts at 0xE0000000 for the simulator. */
+ # undef STACK_GRAN
+ # define STACK_GRAN 0x10000000
+ # define HEURISTIC1
+ # endif
+ # endif
+
+ # ifdef VAX
+ # define MACH_TYPE "VAX"
+ # define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C
compiler */
+ extern char etext[];
+ # define DATASTART ((ptr_t)(etext))
+ # ifdef BSD
+ # define OS_TYPE "BSD"
+ # define HEURISTIC1
+ /* HEURISTIC2 may be OK, but it's hard to test. */
+ # endif
+ # ifdef ULTRIX
+ # define OS_TYPE "ULTRIX"
+ # define STACKBOTTOM ((ptr_t) 0x7fffc800)
+ # endif
+ # endif
+
+ # ifdef RT
+ # define MACH_TYPE "RT"
+ # define ALIGNMENT 4
+ # define DATASTART ((ptr_t) 0x10000000)
+ # define STACKBOTTOM ((ptr_t) 0x1fffd800)
+ # endif
+
+ # ifdef SPARC
+ # define MACH_TYPE "SPARC"
+ # if defined(__arch64__) || defined(__sparcv9)
+ # define ALIGNMENT 8
+ # define CPP_WORDSZ 64
+ # define ELF_CLASS ELFCLASS64
+ # else
+ # define ALIGNMENT 4 /* Required by hardware */
+ # define CPP_WORDSZ 32
+ # endif
+ # define ALIGN_DOUBLE
+ # ifdef SUNOS5
+ # define OS_TYPE "SUNOS5"
+ extern int _etext[];
+ extern int _end[];
+ extern ptr_t GC_SysVGetDataStart();
+ # define DATASTART GC_SysVGetDataStart(0x10000, _etext)
+ # define DATAEND (_end)
+ # if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
+ # define USE_MMAP
+ /* Otherwise we now use calloc. Mmap may result in the */
+ /* heap interleaved with thread stacks, which can result in */
+ /* excessive blacklisting. Sbrk is unusable since it */
+ /* doesn't interact correctly with the system malloc. */
+ # endif
+ # ifdef USE_MMAP
+ # define HEAP_START (ptr_t)0x40000000
+ # else
+ # define HEAP_START DATAEND
+ # endif
+ # define PROC_VDB
+ /* HEURISTIC1 reportedly no longer works under 2.7. */
+ /* HEURISTIC2 probably works, but this appears to be preferable. */
+ /* Apparently USRSTACK is defined to be USERLIMIT, but in some */
+ /* installations that's undefined. We work around this with a */
+ /* gross hack: */
+ # include <sys/vmparam.h>
+ # ifdef USERLIMIT
+ /* This should work everywhere, but doesn't. */
+ # define STACKBOTTOM USRSTACK
+ # else
+ # define HEURISTIC2
+ # endif
+ # include <unistd.h>
+ # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
+ /* getpagesize() appeared to be missing from at least one */
+ /* Solaris 5.4 installation. Weird. */
+ # define DYNAMIC_LOADING
+ # endif
+ # ifdef SUNOS4
+ # define OS_TYPE "SUNOS4"
+ /* [If you have a weak stomach, don't read this.] */
+ /* We would like to use: */
+ /* # define DATASTART ((ptr_t)((((word) (etext)) + 0x1fff) & ~0x1fff))
*/
+ /* This fails occasionally, due to an ancient, but very */
+ /* persistent ld bug. etext is set 32 bytes too high. */
+ /* We instead read the text segment size from the a.out */
+ /* header, which happens to be mapped into our address space */
+ /* at the start of the text segment. The detective work here */
+ /* was done by Robert Ehrlich, Manuel Serrano, and Bernard */
+ /* Serpette of INRIA. */
+ /* This assumes ZMAGIC, i.e. demand-loadable executables. */
+ # define TEXTSTART 0x2000
+ # define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART))
+ # define MPROTECT_VDB
+ # define HEURISTIC1
+ # define DYNAMIC_LOADING
+ # endif
+ # ifdef DRSNX
+ # define OS_TYPE "DRSNX"
+ extern ptr_t GC_SysVGetDataStart();
+ extern int etext[];
+ # define DATASTART GC_SysVGetDataStart(0x10000, etext)
+ # define MPROTECT_VDB
+ # define STACKBOTTOM ((ptr_t) 0xdfff0000)
+ # define DYNAMIC_LOADING
+ # endif
+ # ifdef LINUX
+ # define OS_TYPE "LINUX"
+ # ifdef __ELF__
+ # define DYNAMIC_LOADING
+ # else
+ Linux Sparc/a.out not supported
+ # endif
+ extern int _end[];
+ extern int _etext[];
+ # define DATAEND (_end)
+ # define SVR4
+ extern ptr_t GC_SysVGetDataStart();
+ # ifdef __arch64__
+ # define DATASTART GC_SysVGetDataStart(0x100000, _etext)
+ /* libc_stack_end is not set reliably for sparc64 */
+ # define STACKBOTTOM ((ptr_t) 0x80000000000ULL)
+ # else
+ # define DATASTART GC_SysVGetDataStart(0x10000, _etext)
+ # define LINUX_STACKBOTTOM
+ # endif
+ # endif
+ # ifdef OPENBSD
+ # define OS_TYPE "OPENBSD"
+ # define STACKBOTTOM ((ptr_t) 0xf8000000)
+ extern int etext[];
+ # define DATASTART ((ptr_t)(etext))
+ # endif
+ # ifdef NETBSD
+ # define OS_TYPE "NETBSD"
+ # define HEURISTIC2
+ # ifdef __ELF__
+ # define DATASTART GC_data_start
+ # define DYNAMIC_LOADING
+ # else
+ extern char etext[];
+ # define DATASTART ((ptr_t)(etext))
+ # endif
+ # endif
+ # endif
+
+ # ifdef I386
+ # define MACH_TYPE "I386"
+ # define ALIGNMENT 4 /* Appears to hold for all "32 bit" compilers
*/
+ /* except Borland. The -a4 option fixes */
+ /* Borland. */
+ /* Ivan Demakov: For Watcom the option is -zp4. */
+ # ifndef SMALL_CONFIG
+ # define ALIGN_DOUBLE /* Not strictly necessary, but may give speed */
+ /* improvement on Pentiums. */
+ # endif
+ # ifdef HAVE_BUILTIN_UNWIND_INIT
+ # define USE_GENERIC_PUSH_REGS
+ # endif
+ # ifdef SEQUENT
+ # define OS_TYPE "SEQUENT"
+ extern int etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+ # define STACKBOTTOM ((ptr_t) 0x3ffff000)
+ # endif
+ # ifdef BEOS
+ # define OS_TYPE "BEOS"
+ # include <OS.h>
+ # define GETPAGESIZE() B_PAGE_SIZE
+ extern int etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+ # endif
+ # ifdef SUNOS5
+ # define OS_TYPE "SUNOS5"
+ extern int _etext[], _end[];
+ extern ptr_t GC_SysVGetDataStart();
+ # define DATASTART GC_SysVGetDataStart(0x1000, _etext)
+ # define DATAEND (_end)
+ /* # define STACKBOTTOM ((ptr_t)(_start)) worked through 2.7, */
+ /* but reportedly breaks under 2.8. It appears that the stack */
+ /* base is a property of the executable, so this should not break */
+ /* old executables. */
+ /* HEURISTIC2 probably works, but this appears to be preferable. */
+ # include <sys/vm.h>
+ # define STACKBOTTOM USRSTACK
+ /* At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
+ /* It appears to be fixed in 2.8 and 2.9. */
+ # ifdef SOLARIS25_PROC_VDB_BUG_FIXED
+ # define PROC_VDB
+ # endif
+ # define DYNAMIC_LOADING
+ # if !defined(USE_MMAP) && defined(REDIRECT_MALLOC)
+ # define USE_MMAP
+ /* Otherwise we now use calloc. Mmap may result in the */
+ /* heap interleaved with thread stacks, which can result in */
+ /* excessive blacklisting. Sbrk is unusable since it */
+ /* doesn't interact correctly with the system malloc. */
+ # endif
+ # ifdef USE_MMAP
+ # define HEAP_START (ptr_t)0x40000000
+ # else
+ # define HEAP_START DATAEND
+ # endif
+ # endif
+ # ifdef SCO
+ # define OS_TYPE "SCO"
+ extern int etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
+ & ~0x3fffff) \
+ +((word)etext & 0xfff))
+ # define STACKBOTTOM ((ptr_t) 0x7ffffffc)
+ # endif
+ # ifdef SCO_ELF
+ # define OS_TYPE "SCO_ELF"
+ extern int etext[];
+ # define DATASTART ((ptr_t)(etext))
+ # define STACKBOTTOM ((ptr_t) 0x08048000)
+ # define DYNAMIC_LOADING
+ # define ELF_CLASS ELFCLASS32
+ # endif
+ # ifdef DGUX
+ # define OS_TYPE "DGUX"
+ extern int _etext, _end;
+ extern ptr_t GC_SysVGetDataStart();
+ # define DATASTART GC_SysVGetDataStart(0x1000, &_etext)
+ # define DATAEND (&_end)
+ # define STACK_GROWS_DOWN
+ # define HEURISTIC2
+ # include <unistd.h>
+ # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
+ # define DYNAMIC_LOADING
+ # ifndef USE_MMAP
+ # define USE_MMAP
+ # endif /* USE_MMAP */
+ # define MAP_FAILED (void *) -1
+ # ifdef USE_MMAP
+ # define HEAP_START (ptr_t)0x40000000
+ # else /* USE_MMAP */
+ # define HEAP_START DATAEND
+ # endif /* USE_MMAP */
+ # endif /* DGUX */
+
+ # ifdef LINUX
+ # ifndef __GNUC__
+ /* The Intel compiler doesn't like inline assembly */
+ # define USE_GENERIC_PUSH_REGS
+ # endif
+ # define OS_TYPE "LINUX"
+ # define LINUX_STACKBOTTOM
+ # if 0
+ # define HEURISTIC1
+ # undef STACK_GRAN
+ # define STACK_GRAN 0x10000000
+ /* STACKBOTTOM is usually 0xc0000000, but this changes with */
+ /* different kernel configurations. In particular, systems */
+ /* with 2GB physical memory will usually move the user */
+ /* address space limit, and hence initial SP to 0x80000000. */
+ # endif
+ # if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)
+ # define MPROTECT_VDB
+ # else
+ /* We seem to get random errors in incremental mode, */
+ /* possibly because Linux threads is itself a malloc client */
+ /* and can't deal with the signals. */
+ # endif
+ # define HEAP_START 0x1000
+ /* This encourages mmap to give us low addresses, */
+ /* thus allowing the heap to grow to ~3GB */
+ # ifdef __ELF__
+ # define DYNAMIC_LOADING
+ # ifdef UNDEFINED /* includes ro data */
+ extern int _etext[];
+ # define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) &
~0xfff))
+ # endif
+ # include <features.h>
+ # if defined(__GLIBC__) && __GLIBC__ >= 2
+ # define SEARCH_FOR_DATA_START
+ # else
+ extern char **__environ;
+ # define DATASTART ((ptr_t)(&__environ))
+ /* hideous kludge: __environ is the first */
+ /* word in crt0.o, and delimits the start */
+ /* of the data segment, no matter which */
+ /* ld options were passed through. */
+ /* We could use _etext instead, but that */
+ /* would include .rodata, which may */
+ /* contain large read-only data tables */
+ /* that we'd rather not scan. */
+ # endif
+ extern int _end[];
+ # define DATAEND (_end)
+ # else
+ extern int etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+ # endif
+ # ifdef USE_I686_PREFETCH
+ # define PREFETCH(x) \
+ __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char
*)(x)))
+ /* Empirically prefetcht0 is much more effective at reducing
*/
+ /* cache miss stalls for the targetted load instructions. But it
*/
+ /* seems to interfere enough with other cache traffic that the net
*/
+ /* result is worse than prefetchnta.
*/
+ # if 0
+ /* Using prefetches for write seems to have a slight negative
*/
+ /* impact on performance, at least for a PIII/500.
*/
+ # define PREFETCH_FOR_WRITE(x) \
+ __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char
*)(x)))
+ # endif
+ # endif
+ # ifdef USE_3DNOW_PREFETCH
+ # define PREFETCH(x) \
+ __asm__ __volatile__ (" prefetch %0": : "m"(*(char
*)(x)))
+ # define PREFETCH_FOR_WRITE(x) \
+ __asm__ __volatile__ (" prefetchw %0": : "m"(*(char
*)(x)))
+ # endif
+ # endif
+ # ifdef CYGWIN32
+ # define OS_TYPE "CYGWIN32"
+ extern int _data_start__[];
+ extern int _data_end__[];
+ extern int _bss_start__[];
+ extern int _bss_end__[];
+ /* For binutils 2.9.1, we have */
+ /* DATASTART = _data_start__ */
+ /* DATAEND = _bss_end__ */
+ /* whereas for some earlier versions it was */
+ /* DATASTART = _bss_start__ */
+ /* DATAEND = _data_end__ */
+ /* To get it right for both, we take the */
+ /* minumum/maximum of the two. */
+ # ifndef MAX
+ # define MAX(x,y) ((x) > (y) ? (x) : (y))
+ # endif
+ # ifndef MIN
+ # define MIN(x,y) ((x) < (y) ? (x) : (y))
+ # endif
+ # define DATASTART ((ptr_t) MIN(_data_start__, _bss_start__))
+ # define DATAEND ((ptr_t) MAX(_data_end__, _bss_end__))
+ # undef STACK_GRAN
+ # define STACK_GRAN 0x10000
+ # define HEURISTIC1
+ # endif
+ # ifdef OS2
+ # define OS_TYPE "OS2"
+ /* STACKBOTTOM and DATASTART are handled specially in */
+ /* os_dep.c. OS2 actually has the right */
+ /* system call! */
+ # define DATAEND /* not needed */
+ # define USE_GENERIC_PUSH_REGS
+ # endif
+ # ifdef MSWIN32
+ # define OS_TYPE "MSWIN32"
+ /* STACKBOTTOM and DATASTART are handled specially in */
+ /* os_dep.c. */
+ # ifndef __WATCOMC__
+ # define MPROTECT_VDB
+ # endif
+ # define DATAEND /* not needed */
+ # endif
+ # ifdef MSWINCE
+ # define OS_TYPE "MSWINCE"
+ # define DATAEND /* not needed */
+ # endif
+ # ifdef DJGPP
+ # define OS_TYPE "DJGPP"
+ # include "stubinfo.h"
+ extern int etext[];
+ extern int _stklen;
+ extern int __djgpp_stack_limit;
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0x1ff) & ~0x1ff))
+ /* # define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \
+ + _stklen)) */
+ # define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))
+ /* This may not be right. */
+ # endif
+ # ifdef OPENBSD
+ # define OS_TYPE "OPENBSD"
+ # endif
+ # ifdef FREEBSD
+ # define OS_TYPE "FREEBSD"
+ # ifndef GC_FREEBSD_THREADS
+ # define MPROTECT_VDB
+ # endif
+ # define SIG_SUSPEND SIGUSR1
+ # define SIG_THR_RESTART SIGUSR2
+ # define FREEBSD_STACKBOTTOM
+ # ifdef __ELF__
+ # define DYNAMIC_LOADING
+ # endif
+ extern char etext[];
+ extern char * GC_FreeBSDGetDataStart();
+ # define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext)
+ # endif
+ # ifdef NETBSD
+ # define OS_TYPE "NETBSD"
+ # ifdef __ELF__
+ # define DYNAMIC_LOADING
+ # endif
+ # endif
+ # ifdef THREE86BSD
+ # define OS_TYPE "THREE86BSD"
+ # endif
+ # ifdef BSDI
+ # define OS_TYPE "BSDI"
+ # endif
+ # if defined(OPENBSD) || defined(NETBSD) \
+ || defined(THREE86BSD) || defined(BSDI)
+ # define HEURISTIC2
+ extern char etext[];
+ # define DATASTART ((ptr_t)(etext))
+ # endif
+ # ifdef NEXT
+ # define OS_TYPE "NEXT"
+ # define DATASTART ((ptr_t) get_etext())
+ # define STACKBOTTOM ((ptr_t)0xc0000000)
+ # define DATAEND /* not needed */
+ # endif
+ # ifdef DOS4GW
+ # define OS_TYPE "DOS4GW"
+ extern long __nullarea;
+ extern char _end;
+ extern char *_STACKTOP;
+ /* Depending on calling conventions Watcom C either precedes
+ or does not precedes with undescore names of C-variables.
+ Make sure startup code variables always have the same names. */
+ #pragma aux __nullarea "*";
+ #pragma aux _end "*";
+ # define STACKBOTTOM ((ptr_t) _STACKTOP)
+ /* confused? me too. */
+ # define DATASTART ((ptr_t) &__nullarea)
+ # define DATAEND ((ptr_t) &_end)
+ # endif
+ # ifdef HURD
+ # define OS_TYPE "HURD"
+ # define STACK_GROWS_DOWN
+ # define HEURISTIC2
+ extern int __data_start[];
+ # define DATASTART ( (ptr_t) (__data_start))
+ extern int _end[];
+ # define DATAEND ( (ptr_t) (_end))
+ /* # define MPROTECT_VDB Not quite working yet? */
+ # define DYNAMIC_LOADING
+ # endif
+ # endif
+
+ # ifdef NS32K
+ # define MACH_TYPE "NS32K"
+ # define ALIGNMENT 4
+ extern char **environ;
+ # define DATASTART ((ptr_t)(&environ))
+ /* hideous kludge: environ is the first */
+ /* word in crt0.o, and delimits the start */
+ /* of the data segment, no matter which */
+ /* ld options were passed through. */
+ # define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
+ # endif
+
+ # ifdef MIPS
+ # define MACH_TYPE "MIPS"
+ # ifdef LINUX
+ /* This was developed for a linuxce style platform. Probably */
+ /* needs to be tweaked for workstation class machines. */
+ # define OS_TYPE "LINUX"
+ # define DYNAMIC_LOADING
+ extern int _end[];
+ # define DATAEND (_end)
+ extern int __data_start[];
+ # define DATASTART ((ptr_t)(__data_start))
+ # define ALIGNMENT 4
+ # define USE_GENERIC_PUSH_REGS
+ # if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 || __GLIBC__ > 2
+ # define LINUX_STACKBOTTOM
+ # else
+ # define STACKBOTTOM 0x80000000
+ # endif
+ # endif /* Linux */
+ # ifdef EWS4800
+ # define HEURISTIC2
+ # if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)
+ extern int _fdata[], _end[];
+ # define DATASTART ((ptr_t)_fdata)
+ # define DATAEND ((ptr_t)_end)
+ # define CPP_WORDSZ _MIPS_SZPTR
+ # define ALIGNMENT (_MIPS_SZPTR/8)
+ # else
+ extern int etext[], edata[], end[];
+ extern int _DYNAMIC_LINKING[], _gp[];
+ # define DATASTART ((ptr_t)((((word)etext + 0x3ffff) & ~0x3ffff) \
+ + ((word)etext & 0xffff)))
+ # define DATAEND (edata)
+ # define DATASTART2 (_DYNAMIC_LINKING \
+ ? (ptr_t)(((word)_gp + 0x8000 + 0x3ffff) & ~0x3ffff) \
+ : (ptr_t)edata)
+ # define DATAEND2 (end)
+ # define ALIGNMENT 4
+ # endif
+ # define OS_TYPE "EWS4800"
+ # define USE_GENERIC_PUSH_REGS 1
+ # endif
+ # ifdef ULTRIX
+ # define HEURISTIC2
+ # define DATASTART (ptr_t)0x10000000
+ /* Could probably be slightly higher since */
+ /* startup code allocates lots of stuff. */
+ # define OS_TYPE "ULTRIX"
+ # define ALIGNMENT 4
+ # endif
+ # ifdef RISCOS
+ # define HEURISTIC2
+ # define DATASTART (ptr_t)0x10000000
+ # define OS_TYPE "RISCOS"
+ # define ALIGNMENT 4 /* Required by hardware */
+ # endif
+ # ifdef IRIX5
+ # define HEURISTIC2
+ extern int _fdata[];
+ # define DATASTART ((ptr_t)(_fdata))
+ # ifdef USE_MMAP
+ # define HEAP_START (ptr_t)0x30000000
+ # else
+ # define HEAP_START DATASTART
+ # endif
+ /* Lowest plausible heap address. */
+ /* In the MMAP case, we map there. */
+ /* In either case it is used to identify */
+ /* heap sections so they're not */
+ /* considered as roots. */
+ # define OS_TYPE "IRIX5"
+ /*# define MPROTECT_VDB DOB: this should work, but there is evidence */
+ /* of recent breakage. */
+ # ifdef _MIPS_SZPTR
+ # define CPP_WORDSZ _MIPS_SZPTR
+ # define ALIGNMENT (_MIPS_SZPTR/8)
+ # if CPP_WORDSZ != 64
+ # define ALIGN_DOUBLE
+ # endif
+ # else
+ # define ALIGNMENT 4
+ # define ALIGN_DOUBLE
+ # endif
+ # define DYNAMIC_LOADING
+ # endif
+ # ifdef MSWINCE
+ # define OS_TYPE "MSWINCE"
+ # define ALIGNMENT 4
+ # define DATAEND /* not needed */
+ # endif
+ # if defined(NETBSD)
+ /* This also checked for __MIPSEL__ . Why? NETBSD recognition */
+ /* should be handled at the top of the file. */
+ # define ALIGNMENT 4
+ # define OS_TYPE "NETBSD"
+ # define HEURISTIC2
+ # define USE_GENERIC_PUSH_REGS
+ # ifdef __ELF__
+ extern int etext[];
+ # define DATASTART GC_data_start
+ # define NEED_FIND_LIMIT
+ # define DYNAMIC_LOADING
+ # else
+ # define DATASTART ((ptr_t) 0x10000000)
+ # define STACKBOTTOM ((ptr_t) 0x7ffff000)
+ # endif /* _ELF_ */
+ # endif
+ # endif
+
+ # ifdef RS6000
+ # define MACH_TYPE "RS6000"
+ # ifdef ALIGNMENT
+ # undef ALIGNMENT
+ # endif
+ # ifdef IA64
+ # undef IA64 /* DOB: some AIX installs stupidly define IA64 in
/usr/include/sys/systemcfg.h */
+ # endif
+ # ifdef __64BIT__
+ # define ALIGNMENT 8
+ # define CPP_WORDSZ 64
+ # define STACKBOTTOM ((ptr_t)0x1000000000000000)
+ # else
+ # define ALIGNMENT 4
+ # define CPP_WORDSZ 32
+ # define STACKBOTTOM ((ptr_t)((ulong)&errno))
+ # endif
+ /* From AIX linker man page:
+ _text Specifies the first location of the program.
+ _etext Specifies the first location after the program.
+ _data Specifies the first location of the data.
+ _edata Specifies the first location after the initialized data
+ _end or end Specifies the first location after all data.
+ */
+ extern int _data[], _end[];
+ # define DATASTART ((ptr_t)((ulong)_data))
+ # define DATAEND ((ptr_t)((ulong)_end))
+ extern int errno;
+ # define USE_GENERIC_PUSH_REGS
+ # define DYNAMIC_LOADING
+ /* For really old versions of AIX, this may have to be removed. */
+ # endif
+
+ # ifdef HP_PA
+ # define MACH_TYPE "HP_PA"
+ # ifdef __LP64__
+ # define CPP_WORDSZ 64
+ # define ALIGNMENT 8
+ # else
+ # define CPP_WORDSZ 32
+ # define ALIGNMENT 4
+ # define ALIGN_DOUBLE
+ # endif
+ # if !defined(GC_HPUX_THREADS) && !defined(GC_LINUX_THREADS)
+ # ifndef LINUX /* For now. */
+ # define MPROTECT_VDB
+ # endif
+ # else
+ # define GENERIC_COMPARE_AND_SWAP
+ /* No compare-and-swap instruction. Use pthread mutexes */
+ /* when we absolutely have to. */
+ # ifdef PARALLEL_MARK
+ # define USE_MARK_BYTES
+ /* Minimize compare-and-swap usage. */
+ # endif
+ # endif
+ # define STACK_GROWS_UP
+ # ifdef HPUX
+ # define OS_TYPE "HPUX"
+ extern int __data_start[];
+ # define DATASTART ((ptr_t)(__data_start))
+ # if 0
+ /* The following appears to work for 7xx systems running HP/UX */
+ /* 9.xx Furthermore, it might result in much faster */
+ /* collections than HEURISTIC2, which may involve scanning */
+ /* segments that directly precede the stack. It is not the */
+ /* default, since it may not work on older machine/OS */
+ /* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */
+ /* this.) */
+ # define STACKBOTTOM ((ptr_t) 0x7b033000) /* from /etc/conf/h/param.h
*/
+ # else
+ /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
+ /* to this. Note that the GC must be initialized before the */
+ /* first putenv call. */
+ extern char ** environ;
+ # define STACKBOTTOM ((ptr_t)environ)
+ # endif
+ # define DYNAMIC_LOADING
+ # include <unistd.h>
+ # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
+ # ifndef __GNUC__
+ # define PREFETCH(x) { \
+ register long addr = (long)(x); \
+ (void) _asm ("LDW", 0, 0, addr, 0); \
+ }
+ # endif
+ # endif /* HPUX */
+ # ifdef LINUX
+ # define OS_TYPE "LINUX"
+ # define LINUX_STACKBOTTOM
+ # define DYNAMIC_LOADING
+ # define SEARCH_FOR_DATA_START
+ extern int _end[];
+ # define DATAEND (&_end)
+ # endif /* LINUX */
+ # endif /* HP_PA */
+
+ # ifdef ALPHA
+ # define MACH_TYPE "ALPHA"
+ # define ALIGNMENT 8
+ # define CPP_WORDSZ 64
+ # ifndef LINUX
+ # define USE_GENERIC_PUSH_REGS
+ /* Gcc and probably the DEC/Compaq compiler spill pointers to preserved
*/
+ /* fp registers in some cases when the target is a 21264. The assembly
*/
+ /* code doesn't handle that yet, and version dependencies make that a
*/
+ /* bit tricky. Do the easy thing for now.
*/
+ # endif
+ # ifdef NETBSD
+ # define OS_TYPE "NETBSD"
+ # define HEURISTIC2
+ # define DATASTART GC_data_start
+ # define ELFCLASS32 32
+ # define ELFCLASS64 64
+ # define ELF_CLASS ELFCLASS64
+ # define DYNAMIC_LOADING
+ # endif
+ # ifdef OPENBSD
+ # define OS_TYPE "OPENBSD"
+ # define HEURISTIC2
+ # ifdef __ELF__ /* since OpenBSD/Alpha 2.9 */
+ # define DATASTART GC_data_start
+ # define ELFCLASS32 32
+ # define ELFCLASS64 64
+ # define ELF_CLASS ELFCLASS64
+ # else /* ECOFF, until OpenBSD/Alpha 2.7 */
+ # define DATASTART ((ptr_t) 0x140000000)
+ # endif
+ # endif
+ # ifdef FREEBSD
+ # define OS_TYPE "FREEBSD"
+ /* MPROTECT_VDB is not yet supported at all on FreeBSD/alpha. */
+ # define SIG_SUSPEND SIGUSR1
+ # define SIG_THR_RESTART SIGUSR2
+ # define FREEBSD_STACKBOTTOM
+ # ifdef __ELF__
+ # define DYNAMIC_LOADING
+ # endif
+ /* Handle unmapped hole alpha*-*-freebsd[45]* puts between etext and edata. */
+ extern char etext[];
+ extern char edata[];
+ extern char end[];
+ # define NEED_FIND_LIMIT
+ # define DATASTART ((ptr_t)(&etext))
+ # define DATAEND (GC_find_limit (DATASTART, TRUE))
+ # define DATASTART2 ((ptr_t)(&edata))
+ # define DATAEND2 ((ptr_t)(&end))
+ # endif
+ # ifdef OSF1
+ # define OS_TYPE "OSF1"
+ # define DATASTART ((ptr_t) 0x140000000)
+ extern int _end[];
+ # define DATAEND ((ptr_t) &_end)
+ extern char ** environ;
+ /* round up from the value of environ to the nearest page boundary */
+ /* Probably breaks if putenv is called before collector */
+ /* initialization. */
+ # define STACKBOTTOM ((ptr_t)(((word)(environ) | (getpagesize()-1))+1))
+ /* # define HEURISTIC2 */
+ /* Normally HEURISTIC2 is too conervative, since */
+ /* the text segment immediately follows the stack. */
+ /* Hence we give an upper pound. */
+ /* This is currently unused, since we disabled HEURISTIC2 */
+ extern int __start[];
+ # define HEURISTIC2_LIMIT ((ptr_t)((word)(__start) & ~(getpagesize()-1)))
+ # ifndef GC_OSF1_THREADS
+ /* Unresolved signal issues with threads. */
+ # define MPROTECT_VDB
+ # endif
+ # define DYNAMIC_LOADING
+ # endif
+ # ifdef LINUX
+ # define OS_TYPE "LINUX"
+ # define STACKBOTTOM ((ptr_t) 0x120000000)
+ # ifdef __ELF__
+ # define SEARCH_FOR_DATA_START
+ # define DYNAMIC_LOADING
+ # else
+ # define DATASTART ((ptr_t) 0x140000000)
+ # endif
+ extern int _end[];
+ # define DATAEND (_end)
+ # define MPROTECT_VDB
+ /* Has only been superficially tested. May not */
+ /* work on all versions. */
+ # endif
+ # endif
+
+ # ifdef IA64
+ # define MACH_TYPE "IA64"
+ # define USE_GENERIC_PUSH_REGS
+ /* We need to get preserved registers in addition to register */
+ /* windows. That's easiest to do with setjmp. */
+ # ifdef PARALLEL_MARK
+ # define USE_MARK_BYTES
+ /* Compare-and-exchange is too expensive to use for */
+ /* setting mark bits. */
+ # endif
+ # ifdef HPUX
+ # ifdef _ILP32
+ # define CPP_WORDSZ 32
+ # define ALIGN_DOUBLE
+ /* Requires 8 byte alignment for malloc */
+ # define ALIGNMENT 4
+ # else
+ # ifndef _LP64
+ ---> unknown ABI
+ # endif
+ # define CPP_WORDSZ 64
+ # define ALIGN_DOUBLE
+ /* Requires 16 byte alignment for malloc */
+ # define ALIGNMENT 8
+ # endif
+ # define OS_TYPE "HPUX"
+ extern int __data_start[];
+ # define DATASTART ((ptr_t)(__data_start))
+ /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
+ /* to this. Note that the GC must be initialized before the */
+ /* first putenv call. */
+ extern char ** environ;
+ # define STACKBOTTOM ((ptr_t)environ)
+ # define DYNAMIC_LOADING
+ # include <unistd.h>
+ # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
+ /* The following was empirically determined, and is probably */
+ /* not very robust. */
+ /* Note that the backing store base seems to be at a nice */
+ /* address minus one page. */
+ # define BACKING_STORE_DISPLACEMENT 0x1000000
+ # define BACKING_STORE_ALIGNMENT 0x1000
+ # define BACKING_STORE_BASE \
+ (ptr_t)(((word)GC_stackbottom - BACKING_STORE_DISPLACEMENT - 1) \
+ & ~(BACKING_STORE_ALIGNMENT - 1))
+ # endif
+ # ifdef LINUX
+ # define CPP_WORDSZ 64
+ # define ALIGN_DOUBLE
+ /* Requires 16 byte alignment for malloc */
+ # define ALIGNMENT 8
+ # define OS_TYPE "LINUX"
+ /* The following works on NUE and older kernels: */
+ /* # define STACKBOTTOM ((ptr_t) 0xa000000000000000l) */
+ /* This does not work on NUE: */
+ # define LINUX_STACKBOTTOM
+ /* We also need the base address of the register stack */
+ /* backing store. This is computed in */
+ /* GC_linux_register_stack_base based on the following */
+ /* constants: */
+ # define BACKING_STORE_ALIGNMENT 0x100000
+ # define BACKING_STORE_DISPLACEMENT 0x80000000
+ extern char * GC_register_stackbottom;
+ # define BACKING_STORE_BASE ((ptr_t)GC_register_stackbottom)
+ # define SEARCH_FOR_DATA_START
+ # ifdef __GNUC__
+ # define DYNAMIC_LOADING
+ # else
+ /* In the Intel compiler environment, we seem to end up with */
+ /* statically linked executables and an undefined reference */
+ /* to _DYNAMIC */
+ # endif
+ # define MPROTECT_VDB
+ /* Requires Linux 2.3.47 or later. */
+ extern int _end[];
+ # define DATAEND (_end)
+ # ifdef __GNUC__
+ # define PREFETCH(x) \
+ __asm__ (" lfetch [%0]": : "r"((void *)(x)))
+ # define PREFETCH_FOR_WRITE(x) \
+ __asm__ (" lfetch.excl [%0]": : "r"((void *)(x)))
+ # define CLEAR_DOUBLE(x) \
+ __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x)))
+ # endif
+ # endif
+ # endif
+
+ # ifdef M88K
+ # define MACH_TYPE "M88K"
+ # define ALIGNMENT 4
+ # define ALIGN_DOUBLE
+ extern int etext[];
+ # ifdef CX_UX
+ # define OS_TYPE "CX_UX"
+ # define DATASTART ((((word)etext + 0x3fffff) & ~0x3fffff) + 0x10000)
+ # endif
+ # ifdef DGUX
+ # define OS_TYPE "DGUX"
+ extern ptr_t GC_SysVGetDataStart();
+ # define DATASTART GC_SysVGetDataStart(0x10000, etext)
+ # endif
+ # define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
+ # endif
+
+ # ifdef S370
+ /* If this still works, and if anyone cares, this should probably */
+ /* be moved to the S390 category. */
+ # define MACH_TYPE "S370"
+ # define ALIGNMENT 4 /* Required by hardware */
+ # define USE_GENERIC_PUSH_REGS
+ # ifdef UTS4
+ # define OS_TYPE "UTS4"
+ extern int etext[];
+ extern int _etext[];
+ extern int _end[];
+ extern ptr_t GC_SysVGetDataStart();
+ # define DATASTART GC_SysVGetDataStart(0x10000, _etext)
+ # define DATAEND (_end)
+ # define HEURISTIC2
+ # endif
+ # endif
+
+ # ifdef S390
+ # define MACH_TYPE "S390"
+ # define USE_GENERIC_PUSH_REGS
+ # ifndef __s390x__
+ # define ALIGNMENT 4
+ # define CPP_WORDSZ 32
+ # else
+ # define ALIGNMENT 8
+ # define CPP_WORDSZ 64
+ # define HBLKSIZE 4096
+ # endif
+ # ifdef LINUX
+ # define OS_TYPE "LINUX"
+ # define LINUX_STACKBOTTOM
+ # define DYNAMIC_LOADING
+ extern int __data_start[];
+ # define DATASTART ((ptr_t)(__data_start))
+ extern int _end[];
+ # define DATAEND (_end)
+ # define CACHE_LINE_SIZE 256
+ # define GETPAGESIZE() 4096
+ # endif
+ # endif
+
+ # if defined(PJ)
+ # define ALIGNMENT 4
+ extern int _etext[];
+ # define DATASTART ((ptr_t)(_etext))
+ # define HEURISTIC1
+ # endif
+
+ # ifdef ARM32
+ # define CPP_WORDSZ 32
+ # define MACH_TYPE "ARM32"
+ # define ALIGNMENT 4
+ # ifdef NETBSD
+ # define OS_TYPE "NETBSD"
+ # define HEURISTIC2
+ extern char etext[];
+ # define DATASTART ((ptr_t)(etext))
+ # define USE_GENERIC_PUSH_REGS
+ # endif
+ # ifdef LINUX
+ # define OS_TYPE "LINUX"
+ # define HEURISTIC1
+ # undef STACK_GRAN
+ # define STACK_GRAN 0x10000000
+ # define USE_GENERIC_PUSH_REGS
+ # ifdef __ELF__
+ # define DYNAMIC_LOADING
+ # include <features.h>
+ # if defined(__GLIBC__) && __GLIBC__ >= 2
+ # define SEARCH_FOR_DATA_START
+ # else
+ extern char **__environ;
+ # define DATASTART ((ptr_t)(&__environ))
+ /* hideous kludge: __environ is the first */
+ /* word in crt0.o, and delimits the start */
+ /* of the data segment, no matter which */
+ /* ld options were passed through. */
+ /* We could use _etext instead, but that */
+ /* would include .rodata, which may */
+ /* contain large read-only data tables */
+ /* that we'd rather not scan. */
+ # endif
+ extern int _end[];
+ # define DATAEND (_end)
+ # else
+ extern int etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+ # endif
+ # endif
+ # ifdef MSWINCE
+ # define OS_TYPE "MSWINCE"
+ # define DATAEND /* not needed */
+ # endif
+ # ifdef NOSYS
+ /* __data_start is usually defined in the target linker script. */
+ extern int __data_start[];
+ # define DATASTART (ptr_t)(__data_start)
+ # define USE_GENERIC_PUSH_REGS
+ /* __stack_base__ is set in newlib/libc/sys/arm/crt0.S */
+ extern void *__stack_base__;
+ # define STACKBOTTOM ((ptr_t) (__stack_base__))
+ # endif
+ #endif
+
+ # ifdef SH
+ # define MACH_TYPE "SH"
+ # define ALIGNMENT 4
+ # ifdef MSWINCE
+ # define OS_TYPE "MSWINCE"
+ # define DATAEND /* not needed */
+ # endif
+ # ifdef LINUX
+ # define OS_TYPE "LINUX"
+ # define STACKBOTTOM ((ptr_t) 0x7c000000)
+ # define USE_GENERIC_PUSH_REGS
+ # define DYNAMIC_LOADING
+ # define SEARCH_FOR_DATA_START
+ extern int _end[];
+ # define DATAEND (_end)
+ # endif
+ # endif
+
+ # ifdef SH4
+ # define MACH_TYPE "SH4"
+ # define OS_TYPE "MSWINCE"
+ # define ALIGNMENT 4
+ # define DATAEND /* not needed */
+ # endif
+
+ # ifdef X86_64
+ # define MACH_TYPE "X86_64"
+ # define ALIGNMENT 8
+ # define CPP_WORDSZ 64
+ # ifndef HBLKSIZE
+ # define HBLKSIZE 4096
+ # endif
+ # define CACHE_LINE_SIZE 64
+ # define USE_GENERIC_PUSH_REGS
+ # ifdef LINUX
+ # define OS_TYPE "LINUX"
+ # define LINUX_STACKBOTTOM
+ # if !defined(GC_LINUX_THREADS) || !defined(REDIRECT_MALLOC)
+ # define MPROTECT_VDB
+ # else
+ /* We seem to get random errors in incremental mode, */
+ /* possibly because Linux threads is itself a malloc client */
+ /* and can't deal with the signals. */
+ # endif
+ # ifdef __ELF__
+ # define DYNAMIC_LOADING
+ # ifdef UNDEFINED /* includes ro data */
+ extern int _etext[];
+ # define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) &
~0xfff))
+ # endif
+ # include <features.h>
+ # define SEARCH_FOR_DATA_START
+ extern int _end[];
+ # define DATAEND (_end)
+ # else
+ extern int etext[];
+ # define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
+ # endif
+ # define PREFETCH(x) \
+ __asm__ __volatile__ (" prefetch %0": : "m"(*(char
*)(x)))
+ # define PREFETCH_FOR_WRITE(x) \
+ __asm__ __volatile__ (" prefetchw %0": : "m"(*(char
*)(x)))
+ # endif
+ # endif
+
+ #if defined(LINUX) && defined(REDIRECT_MALLOC)
+ /* Rld appears to allocate some memory with its own allocator, and
*/
+ /* some through malloc, which might be redirected. To make this */
+ /* work with collectable memory, we have to scan memory allocated */
+ /* by rld's internal malloc. */
+ # define USE_PROC_FOR_LIBRARIES
+ #endif
+
+ # ifndef STACK_GROWS_UP
+ # define STACK_GROWS_DOWN
+ # endif
+
+ # ifndef CPP_WORDSZ
+ # define CPP_WORDSZ 32
+ # endif
+
+ # ifndef OS_TYPE
+ # define OS_TYPE ""
+ # endif
+
+ # ifndef DATAEND
+ extern int end[];
+ # define DATAEND (end)
+ # endif
+
+ # if defined(SVR4) && !defined(GETPAGESIZE)
+ # include <unistd.h>
+ # define GETPAGESIZE() sysconf(_SC_PAGESIZE)
+ # endif
+
+ # ifndef GETPAGESIZE
+ # if defined(SUNOS5) || defined(IRIX5)
+ # include <unistd.h>
+ # endif
+ # define GETPAGESIZE() getpagesize()
+ # endif
+
+ # if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)
+ /* OS has SVR4 generic features. Probably others also qualify.
*/
+ # define SVR4
+ # endif
+
+ # if defined(SUNOS5) || defined(DRSNX)
+ /* OS has SUNOS5 style semi-undocumented interface to dynamic
*/
+ /* loader.
*/
+ # define SUNOS5DL
+ /* OS has SUNOS5 style signal handlers.
*/
+ # define SUNOS5SIGS
+ # endif
+
+ # if defined(HPUX)
+ # define SUNOS5SIGS
+ # endif
+
+ # if defined(SVR4) || defined(LINUX) || defined(IRIX) || defined(HPUX) \
+ || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \
+ || defined(DGUX) || defined(BSD) \
+ || defined(_AIX) || defined(DARWIN) || defined(OSF1)
+ # define UNIX_LIKE /* Basic Unix-like system calls work. */
+ # endif
+
+ # if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
+ -> bad word size
+ # endif
+
+ # ifdef PCR
+ # undef DYNAMIC_LOADING
+ # undef STACKBOTTOM
+ # undef HEURISTIC1
+ # undef HEURISTIC2
+ # undef PROC_VDB
+ # undef MPROTECT_VDB
+ # define PCR_VDB
+ # endif
+
+ # ifdef SRC_M3
+ /* Postponed for now. */
+ # undef PROC_VDB
+ # undef MPROTECT_VDB
+ # endif
+
+ # ifdef SMALL_CONFIG
+ /* Presumably not worth the space it takes. */
+ # undef PROC_VDB
+ # undef MPROTECT_VDB
+ # endif
+
+ # ifdef USE_MUNMAP
+ # undef MPROTECT_VDB /* Can't deal with address space holes. */
+ # endif
+
+ # ifdef PARALLEL_MARK
+ # undef MPROTECT_VDB /* For now. */
+ # endif
+
+ # if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
+ # define DEFAULT_VDB
+ # endif
+
+ # ifndef PREFETCH
+ # define PREFETCH(x)
+ # define NO_PREFETCH
+ # endif
+
+ # ifndef PREFETCH_FOR_WRITE
+ # define PREFETCH_FOR_WRITE(x)
+ # define NO_PREFETCH_FOR_WRITE
+ # endif
+
+ # ifndef CACHE_LINE_SIZE
+ # define CACHE_LINE_SIZE 32 /* Wild guess */
+ # endif
+
+ # ifdef LINUX
+ # define REGISTER_LIBRARIES_EARLY
+ /* We sometimes use dl_iterate_phdr, which may acquire an internal
*/
+ /* lock. This isn't safe after the world has stopped. So we must
*/
+ /* call GC_register_dynamic_libraries before stopping the world. */
+ /* For performance reasons, this may be beneficial on other
*/
+ /* platforms as well, though it should be avoided in win32.
*/
+ # endif /* LINUX */
+
+ # if defined(SEARCH_FOR_DATA_START)
+ extern ptr_t GC_data_start;
+ # define DATASTART GC_data_start
+ # endif
+
+ # ifndef CLEAR_DOUBLE
+ # define CLEAR_DOUBLE(x) \
+ ((word*)x)[0] = 0; \
+ ((word*)x)[1] = 0;
+ # endif /* CLEAR_DOUBLE */
+
+ /* Internally we use GC_SOLARIS_THREADS to test for either old or
pthreads. */
+ # if defined(GC_SOLARIS_PTHREADS) && !defined(GC_SOLARIS_THREADS)
+ # define GC_SOLARIS_THREADS
+ # endif
+
+ # if defined(GC_IRIX_THREADS) && !defined(IRIX5)
+ --> inconsistent configuration
+ # endif
+ # if defined(GC_LINUX_THREADS) && !defined(LINUX)
+ --> inconsistent configuration
+ # endif
+ # if defined(GC_SOLARIS_THREADS) && !defined(SUNOS5)
+ --> inconsistent configuration
+ # endif
+ # if defined(GC_HPUX_THREADS) && !defined(HPUX)
+ --> inconsistent configuration
+ # endif
+ # if defined(GC_AIX_THREADS) && !defined(_AIX)
+ --> inconsistent configuration
+ # endif
+ # if defined(GC_WIN32_THREADS) && !defined(MSWIN32) && !defined(CYGWIN32)
+ --> inconsistent configuration
+ # endif
+
+ # if defined(PCR) || defined(SRC_M3) || \
+ defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) || \
+ defined(GC_PTHREADS)
+ # define THREADS
+ # endif
+
+ # if defined(HP_PA) || defined(M88K) || defined(POWERPC) && !defined(DARWIN) \
+ || defined(LINT) || defined(MSWINCE) || defined(ARM32) \
+ || (defined(I386) && defined(__LCC__))
+ /* Use setjmp based hack to mark from callee-save registers. */
+ /* The define should move to the individual platform */
+ /* descriptions. */
+ # define USE_GENERIC_PUSH_REGS
+ # endif
+
+ # if defined(SPARC)
+ # define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */
+ /* include assembly code to do it well. */
+ # endif
+
+ /* Can we save call chain in objects for debugging? */
+ /* SET NFRAMES (# of saved frames) and NARGS (#of args for each */
+ /* frame) to reasonable values for the platform. */
+ /* Set SAVE_CALL_CHAIN if we can. SAVE_CALL_COUNT can be specified
*/
+ /* at build time, though we feel free to adjust it slightly.
*/
+ /* Define NEED_CALLINFO if we either save the call stack or
*/
+ /* GC_ADD_CALLER is defined.
*/
+ /* GC_CAN_SAVE_CALL_STACKS is set in gc.h. */
+
+ #if defined(SPARC)
+ # define CAN_SAVE_CALL_ARGS
+ #endif
+ #if (defined(I386) || defined(X86_64)) && defined(LINUX)
+ /* SAVE_CALL_CHAIN is supported if the code is compiled to save
*/
+ /* frame pointers by default, i.e. no -fomit-frame-pointer flag.
*/
+ # define CAN_SAVE_CALL_ARGS
+ #endif
+
+ # if defined(SAVE_CALL_COUNT) && !defined(GC_ADD_CALLER) \
+ && defined(GC_CAN_SAVE_CALL_STACKS)
+ # define SAVE_CALL_CHAIN
+ # endif
+ # ifdef SAVE_CALL_CHAIN
+ # if defined(SAVE_CALL_NARGS) && defined(CAN_SAVE_CALL_ARGS)
+ # define NARGS SAVE_CALL_NARGS
+ # else
+ # define NARGS 0 /* Number of arguments to save for each call. */
+ # endif
+ # endif
+ # ifdef SAVE_CALL_CHAIN
+ # ifndef SAVE_CALL_COUNT
+ # define NFRAMES 6 /* Number of frames to save. Even for
*/
+ /* alignment reasons.
*/
+ # else
+ # define NFRAMES ((SAVE_CALL_COUNT + 1) & ~1)
+ # endif
+ # define NEED_CALLINFO
+ # endif /* SAVE_CALL_CHAIN */
+ # ifdef GC_ADD_CALLER
+ # define NFRAMES 1
+ # define NARGS 0
+ # define NEED_CALLINFO
+ # endif
+
+ # if defined(MAKE_BACK_GRAPH) && !defined(DBG_HDRS_ALL)
+ # define DBG_HDRS_ALL
+ # endif
+
+ # if defined(POINTER_MASK) && !defined(POINTER_SHIFT)
+ # define POINTER_SHIFT 0
+ # endif
+
+ # if defined(POINTER_SHIFT) && !defined(POINTER_MASK)
+ # define POINTER_MASK ((GC_word)(-1))
+ # endif
+
+ # if !defined(FIXUP_POINTER) && defined(POINTER_MASK)
+ # define FIXUP_POINTER(p) (p) = ((p) & (POINTER_MASK) << POINTER_SHIFT)
+ # endif
+
+ # if defined(FIXUP_POINTER)
+ # define NEED_FIXUP_POINTER 1
+ # else
+ # define NEED_FIXUP_POINTER 0
+ # define FIXUP_POINTER(p)
+ # endif
+
+ #ifdef GC_PRIVATE_H
+ /* This relies on some type definitions from gc_priv.h, from */
+ /* where it's normally included. */
+ /* */
+ /* How to get heap memory from the OS: */
+ /* Note that sbrk()-like allocation is preferred, since it */
+ /* usually makes it possible to merge consecutively allocated */
+ /* chunks. It also avoids unintented recursion with */
+ /* -DREDIRECT_MALLOC. */
+ /* GET_MEM() returns a HLKSIZE aligned chunk. */
+ /* 0 is taken to mean failure. */
+ /* In the case os USE_MMAP, the argument must also be a */
+ /* physical page size. */
+ /* GET_MEM is currently not assumed to retrieve 0 filled space, */
+ /* though we should perhaps take advantage of the case in which */
+ /* does. */
+ struct hblk; /* See gc_priv.h. */
+ # ifdef PCR
+ char * real_malloc();
+ # define GET_MEM(bytes) HBLKPTR(real_malloc((size_t)bytes + GC_page_size) \
+ + GC_page_size-1)
+ # else
+ # ifdef OS2
+ void * os2_alloc(size_t bytes);
+ # define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc((size_t)bytes \
+ + GC_page_size) \
+ + GC_page_size-1)
+ # else
+ # if defined(NEXT) || defined(DOS4GW) || \
+ (defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) || \
+ (defined(SUNOS5) && !defined(USE_MMAP))
+ # define GET_MEM(bytes) HBLKPTR((size_t) \
+ calloc(1, (size_t)bytes +
GC_page_size) \
+ + GC_page_size-1)
+ # else
+ # ifdef MSWIN32
+ extern ptr_t GC_win32_get_mem();
+ # define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes)
+ # else
+ # ifdef MACOS
+ # if defined(USE_TEMPORARY_MEMORY)
+ extern Ptr GC_MacTemporaryNewPtr(size_t size,
+ Boolean clearMemory);
+ # define GET_MEM(bytes) HBLKPTR( \
+ GC_MacTemporaryNewPtr(bytes + GC_page_size, true) \
+ + GC_page_size-1)
+ # else
+ # define GET_MEM(bytes) HBLKPTR( \
+ NewPtrClear(bytes + GC_page_size) +
GC_page_size-1)
+ # endif
+ # else
+ # ifdef MSWINCE
+ extern ptr_t GC_wince_get_mem();
+ # define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes)
+ # else
+ # if defined(AMIGA) && defined(GC_AMIGA_FASTALLOC)
+ extern void *GC_amiga_get_mem(size_t size);
+ define GET_MEM(bytes) HBLKPTR((size_t) \
+ GC_amiga_get_mem((size_t)bytes + GC_page_size) \
+ + GC_page_size-1)
+ # else
+ extern ptr_t GC_unix_get_mem();
+ # define GET_MEM(bytes) (struct hblk *)GC_unix_get_mem(bytes)
+ # endif
+ # endif
+ # endif
+ # endif
+ # endif
+ # endif
+ # endif
+
+ #endif /* GC_PRIVATE_H */
+
+ # endif /* GCCONFIG_H */
| [Prev in Thread] |
Current Thread |
[Next in Thread] |
- [Emacs-diffs] Changes to emacs/gc/include/private/gcconfig.h [Boehm-versions],
Dave Love <=