* 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. */
/* First a unified test for Linux: */
# if defined(linux) || defined(__linux__)
+# ifndef LINUX
# define LINUX
+# endif
# endif
/* And one for NetBSD: */
# define OPENBSD
# endif
+/* And one for FreeBSD: */
+# if defined(__FreeBSD__)
+# define FREEBSD
+# endif
+
/* Determine the machine type: */
-# if defined(__XSCALE__)
+# if defined(__arm__) || defined(__thumb__)
# define ARM32
-# if !defined(LINUX)
+# if !defined(LINUX) && !defined(NETBSD)
# define NOSYS
# define mach_type_known
# endif
# define SPARC
# define mach_type_known
# endif
-# if defined(NETBSD) && defined(m68k)
+# if defined(NETBSD) && (defined(m68k) || defined(__m68k__))
# define M68K
# define mach_type_known
# endif
# define POWERPC
# define mach_type_known
# endif
-# if defined(NETBSD) && defined(__arm32__)
+# if defined(NETBSD) && (defined(__arm32__) || defined(__arm__))
# define ARM32
# define mach_type_known
# endif
# endif
# define mach_type_known
# endif
-# if defined(mips) || defined(__mips)
+# if defined(__NetBSD__) && defined(__vax__)
+# define VAX
+# define mach_type_known
+# endif
+# if defined(mips) || defined(__mips) || defined(_mips)
# define MIPS
-# if !defined(LINUX)
-# if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
+# if defined(nec_ews) || defined(_nec_ews)
+# define EWS4800
+# endif
+# if !defined(LINUX) && !defined(EWS4800) && !defined(NETBSD)
+# if defined(ultrix) || defined(__ultrix)
# define ULTRIX
# else
# if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \
# endif
# endif
# endif /* !LINUX */
-# if defined(__NetBSD__) && defined(__MIPSEL__)
-# undef ULTRIX
+# 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
# 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(powerpc) || defined(__powerpc__))
+# 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
# endif
# if defined(__alpha) || defined(__alpha__)
# define ALPHA
-# if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD)
+# if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) && !defined(FREEBSD)
# define OSF1 /* a.k.a Digital Unix */
# endif
# define mach_type_known
# define MACOS
# define mach_type_known
# endif
-# if defined(__MWERKS__) && defined(__powerc)
+# 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 MACOSX
+# define DARWIN
# define POWERPC
# define mach_type_known
# endif
# if defined(__APPLE__) && defined(__MACH__) && defined(__i386__)
-# define MACOSX
+# define DARWIN
# define I386
--> Not really supported, but at least we recognize it.
# endif
# define OPENBSD
# define mach_type_known
# endif
-# if defined(__FreeBSD__) && (defined(i386) || defined(__i386__))
+# if defined(FREEBSD) && (defined(i386) || defined(__i386__))
# define I386
-# define FREEBSD
# define mach_type_known
# endif
# if defined(__NetBSD__) && (defined(i386) || defined(__i386__))
# define CX_UX
# define mach_type_known
# endif
-# if defined(DGUX)
+# if defined(DGUX) && defined(m88k)
# define M88K
/* DGUX defined */
# define mach_type_known
# define mach_type_known
# endif
# if defined(__s390__) && defined(LINUX)
-# define S370
+# define S390
# define mach_type_known
# endif
# if defined(__GNU__)
/* (CX_UX and DGUX) */
/* S370 ==> 370-like machine */
/* running Amdahl UTS4 */
- /* or a 390 running LINUX */
+ /* S390 ==> 390-like machine */
+ /* running LINUX */
/* ARM32 ==> Intel StrongARM */
/* IA64 ==> Intel IPF */
/* (e.g. Itanium) */
/* (LINUX and HPUX) */
- /* IA64_32 ==> IA64 w/32 bit ABI */
- /* (HPUX) */
/* SH ==> Hitachi SuperH */
/* (LINUX & MSWINCE) */
+ /* X86_64 ==> AMD x86-64 */
+ /* POWERPC ==> IBM/Apple PowerPC */
+ /* (MACOS(<=9),DARWIN(incl.MACOSX),*/
+ /* LINUX, NETBSD, NOSYS variants) */
/*
* defining it to be 1 will always work, but perform poorly.
*
* DATASTART is the beginning of the data segment.
- * On UNIX systems, the collector will scan the area between DATASTART
+ * 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.
+ * 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;'' .
+ * Otherwise, ``GCC will assume these are in .sdata/.sbss'' and it will, e.g.,
+ * cause failures on alpha*-*-* with ``-msmall-data or -fpic'' or mips-*-*
+ * without any special options.
*
* ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice
* the pointer size.
* 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
* 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()
# ifdef OPENBSD
# define OS_TYPE "OPENBSD"
# define HEURISTIC2
- extern char etext;
-# define DATASTART ((ptr_t)(&etext))
+ 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))
+# ifdef __ELF__
+# define DATASTART GC_data_start
+# define DYNAMIC_LOADING
+# else
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
+# endif
# endif
# ifdef LINUX
# define OS_TYPE "LINUX"
# define STACKBOTTOM ((ptr_t)0xf0000000)
+# define USE_GENERIC_PUSH_REGS
+# define USE_MMAP
+ /* We never got around to the assembly version. */
/* # define MPROTECT_VDB - Reported to not work 9/17/01 */
# ifdef __ELF__
# define DYNAMIC_LOADING
# include <features.h>
# if defined(__GLIBC__)&& __GLIBC__>=2
-# define LINUX_DATA_START
+# define SEARCH_FOR_DATA_START
# else /* !GLIBC2 */
extern char **__environ;
# define DATASTART ((ptr_t)(&__environ))
/* contain large read-only data tables */
/* that we'd rather not scan. */
# endif /* !GLIBC2 */
- extern int _end;
-# define DATAEND (&_end)
+ extern int _end[];
+# define DATAEND (_end)
# else
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
+ 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))
+ 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))
+ extern char etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
# define STACKBOTTOM ((ptr_t) 0xffeffffc)
/* empirically determined. seems to work. */
# include <unistd.h>
# endif
# ifdef SYSV
# define OS_TYPE "SYSV"
- extern etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
+ extern etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
& ~0x3fffff) \
- +((word)&etext & 0x1fff))
+ +((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,
+ in which case the default of etext would work. Unfortunately,
handling both would require having the magic-number available.
-- Parag
*/
# define DATAEND /* not needed */
# endif
# ifdef LINUX
-# define ALIGNMENT 4 /* Guess. Can someone verify? */
- /* This was 2, but that didn't sound right. */
+# if (defined (powerpc64) || defined(__powerpc64__))
+# define ALIGNMENT 8
+# define CPP_WORDSZ 64
+# else
+# define ALIGNMENT 4
+# endif
# define OS_TYPE "LINUX"
-# define HEURISTIC1
+ /* HEURISTIC1 has been reliably reported to fail for a 32-bit */
+ /* executable on a 64 bit kernel. */
+# define LINUX_STACKBOTTOM
# define DYNAMIC_LOADING
-# undef STACK_GRAN
-# define STACK_GRAN 0x10000000
- /* Stack usually starts at 0x80000000 */
-# define LINUX_DATA_START
- extern int _end;
-# define DATAEND (&_end)
+# define SEARCH_FOR_DATA_START
+ extern int _end[];
+# define DATAEND (_end)
# endif
-# ifdef MACOSX
- /* There are reasons to suspect this may not be reliable. */
+# ifdef DARWIN
# define ALIGNMENT 4
-# define OS_TYPE "MACOSX"
+# 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 DATAEND /* not needed */
+# 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;
+ 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)
+ 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
# 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))
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
# ifdef BSD
# define OS_TYPE "BSD"
# define HEURISTIC1
# 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 char * GC_SysVGetDataStart();
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
-# define DATAEND (&_end)
-# ifndef USE_MMAP
+ 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
# 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)) */
+/* # 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. */
+ /* 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 */
# define DYNAMIC_LOADING
# endif
# ifdef DRSNX
-# define CPP_WORDSZ 32
# define OS_TYPE "DRSNX"
- extern char * GC_SysVGetDataStart();
- extern int etext;
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
+ 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
# else
Linux Sparc/a.out not supported
# endif
- extern int _end;
- extern int _etext;
-# define DATAEND (&_end)
+ 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)
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x100000, &_etext)
-# define CPP_WORDSZ 64
# else
-# define STACKBOTTOM ((ptr_t) 0xf0000000)
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
+# 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))
+ extern int etext[];
+# define DATASTART ((ptr_t)(etext))
# endif
# ifdef NETBSD
# define OS_TYPE "NETBSD"
# define DATASTART GC_data_start
# define DYNAMIC_LOADING
# else
- extern char etext;
-# define DATASTART ((ptr_t)(&etext))
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
# endif
# endif
# endif
# endif
# ifdef SEQUENT
# define OS_TYPE "SEQUENT"
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
+ 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))
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
# endif
# ifdef SUNOS5
# define OS_TYPE "SUNOS5"
- extern int _etext, _end;
- extern char * GC_SysVGetDataStart();
-# define DATASTART GC_SysVGetDataStart(0x1000, &_etext)
-# define DATAEND (&_end)
-/* # define STACKBOTTOM ((ptr_t)(&_start)) worked through 2.7, */
+ 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/vmparam.h>
+# include <sys/vm.h>
# define STACKBOTTOM USRSTACK
-/** At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
+/* 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
-# ifndef USE_MMAP
+# 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
# endif
# ifdef SCO
# define OS_TYPE "SCO"
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0x3fffff) \
& ~0x3fffff) \
- +((word)&etext & 0xfff))
+ +((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))
+ 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
/* 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))
+ extern int _etext[];
+# define DATASTART ((ptr_t)((((word) (_etext)) + 0xfff) & ~0xfff))
# endif
# include <features.h>
# if defined(__GLIBC__) && __GLIBC__ >= 2
-# define LINUX_DATA_START
+# define SEARCH_FOR_DATA_START
# else
extern char **__environ;
# define DATASTART ((ptr_t)(&__environ))
/* contain large read-only data tables */
/* that we'd rather not scan. */
# endif
- extern int _end;
-# define DATAEND (&_end)
+ extern int _end[];
+# define DATAEND (_end)
# else
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
# endif
# ifdef USE_I686_PREFETCH
# define PREFETCH(x) \
# endif
# ifdef CYGWIN32
# define OS_TYPE "CYGWIN32"
- extern int _data_start__;
- extern int _data_end__;
- extern int _bss_start__;
- extern int _bss_end__;
+ 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__ */
/* 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))
-# define DATASTART ((ptr_t) MIN(&_data_start__, &_bss_start__))
-# define DATAEND ((ptr_t) MAX(&_data_end__, &_bss_end__))
+# 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
# ifdef DJGPP
# define OS_TYPE "DJGPP"
# include "stubinfo.h"
- extern int etext;
+ extern int etext[];
extern int _stklen;
extern int __djgpp_stack_limit;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ff) & ~0x1ff))
+# 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))
# 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"
# ifdef BSDI
# define OS_TYPE "BSDI"
# endif
-# if defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \
+# if defined(OPENBSD) || defined(NETBSD) \
|| defined(THREE86BSD) || defined(BSDI)
# define HEURISTIC2
- extern char etext;
-# define DATASTART ((ptr_t)(&etext))
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
# endif
# ifdef NEXT
# define OS_TYPE "NEXT"
# 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))
+ 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
/* This was developed for a linuxce style platform. Probably */
/* needs to be tweaked for workstation class machines. */
# define OS_TYPE "LINUX"
- extern int __data_start;
-# define DATASTART ((ptr_t)(&__data_start))
+# 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
-# define STACKBOTTOM ((ptr_t)0x7fff8000)
- /* Older toolchains may need 0x80000000. */
- /* In many cases, this should probably use LINUX_STACKBOTTOM */
- /* instead. But some kernel versions seem to give the wrong */
- /* value from /proc. */
+# 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
# endif
# ifdef IRIX5
# define HEURISTIC2
- extern int _fdata;
-# define DATASTART ((ptr_t)(&_fdata))
+ extern int _fdata[];
+# define DATASTART ((ptr_t)(_fdata))
# ifdef USE_MMAP
# define HEAP_START (ptr_t)0x30000000
# else
/* heap sections so they're not */
/* considered as roots. */
# define OS_TYPE "IRIX5"
-# define MPROTECT_VDB
+/*# 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)
# 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 ALIGNMENT 4
# define HEURISTIC2
# define USE_GENERIC_PUSH_REGS
# ifdef __ELF__
- extern int etext;
+ extern int etext[];
# define DATASTART GC_data_start
# define NEED_FIND_LIMIT
# define DYNAMIC_LOADING
# 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
-# endif
- extern int _data, _end;
-# define DATASTART ((ptr_t)((ulong)&_data))
-# define DATAEND ((ptr_t)((ulong)&_end))
+# 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 STACKBOTTOM ((ptr_t)((ulong)&errno))
# define USE_GENERIC_PUSH_REGS
# define DYNAMIC_LOADING
/* For really old versions of AIX, this may have to be removed. */
# define STACK_GROWS_UP
# ifdef HPUX
# define OS_TYPE "HPUX"
- extern int __data_start;
-# define DATASTART ((ptr_t)(&__data_start))
+ 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 */
# define OS_TYPE "LINUX"
# define LINUX_STACKBOTTOM
# define DYNAMIC_LOADING
-# define LINUX_DATA_START
- extern int _end;
+# 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 ELFCLASS32 32
# define ELFCLASS64 64
# define ELF_CLASS ELFCLASS64
-# define CPP_WORDSZ 64
# define DYNAMIC_LOADING
# endif
# ifdef OPENBSD
# define OS_TYPE "OPENBSD"
# define HEURISTIC2
-# define CPP_WORDSZ 64
# ifdef __ELF__ /* since OpenBSD/Alpha 2.9 */
# define DATASTART GC_data_start
# define ELFCLASS32 32
# 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;
+ extern int _end[];
# define DATAEND ((ptr_t) &_end)
extern char ** environ;
/* round up from the value of environ to the nearest page boundary */
/* 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)))
-# define CPP_WORDSZ 64
-# define MPROTECT_VDB
+ 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 CPP_WORDSZ 64
# define STACKBOTTOM ((ptr_t) 0x120000000)
# ifdef __ELF__
# define SEARCH_FOR_DATA_START
-# define DATASTART GC_data_start
# define DYNAMIC_LOADING
# else
# define DATASTART ((ptr_t) 0x140000000)
# endif
- extern int _end;
-# define DATAEND (&_end)
+ extern int _end[];
+# define DATAEND (_end)
# define MPROTECT_VDB
/* Has only been superficially tested. May not */
/* work on all versions. */
# define ALIGNMENT 8
# endif
# define OS_TYPE "HPUX"
- extern int __data_start;
-# define DATASTART ((ptr_t)(&__data_start))
+ 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 * GC_register_stackbottom;
# define BACKING_STORE_BASE ((ptr_t)GC_register_stackbottom)
# define SEARCH_FOR_DATA_START
-# define DATASTART GC_data_start
-# define DYNAMIC_LOADING
+# 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)
+ extern int _end[];
+# define DATAEND (_end)
# ifdef __GNUC__
# define PREFETCH(x) \
__asm__ (" lfetch [%0]": : "r"((void *)(x)))
# define MACH_TYPE "M88K"
# define ALIGNMENT 4
# define ALIGN_DOUBLE
- extern int etext;
+ extern int etext[];
# ifdef CX_UX
# define OS_TYPE "CX_UX"
-# define DATASTART ((((word)&etext + 0x3fffff) & ~0x3fffff) + 0x10000)
+# define DATASTART ((((word)etext + 0x3fffff) & ~0x3fffff) + 0x10000)
# endif
# ifdef DGUX
# define OS_TYPE "DGUX"
- extern char * GC_SysVGetDataStart();
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
+ 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 char * GC_SysVGetDataStart();
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
-# define DATAEND (&_end)
+ 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 HEURISTIC1
+# define LINUX_STACKBOTTOM
# define DYNAMIC_LOADING
- extern int __data_start;
-# define DATASTART ((ptr_t)(&__data_start))
+ 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))
+ extern int _etext[];
+# define DATASTART ((ptr_t)(_etext))
# define HEURISTIC1
# endif
# ifdef NETBSD
# define OS_TYPE "NETBSD"
# define HEURISTIC2
- extern char etext;
-# define DATASTART ((ptr_t)(&etext))
+# ifdef __ELF__
+# define DATASTART GC_data_start
+# define DYNAMIC_LOADING
+# else
+ extern char etext[];
+# define DATASTART ((ptr_t)(etext))
+# endif
# define USE_GENERIC_PUSH_REGS
# endif
# ifdef LINUX
# define DYNAMIC_LOADING
# include <features.h>
# if defined(__GLIBC__) && __GLIBC__ >= 2
-# define LINUX_DATA_START
+# define SEARCH_FOR_DATA_START
# else
extern char **__environ;
# define DATASTART ((ptr_t)(&__environ))
/* contain large read-only data tables */
/* that we'd rather not scan. */
# endif
- extern int _end;
-# define DATAEND (&_end)
+ extern int _end[];
+# define DATAEND (_end)
# else
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
+ extern int etext[];
+# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff))
# endif
# endif
# ifdef MSWINCE
# endif
# ifdef NOSYS
/* __data_start is usually defined in the target linker script. */
- extern int __data_start;
-# define DATASTART (ptr_t)(&__data_start)
+ 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) 0x7c000000)
# define USE_GENERIC_PUSH_REGS
# define DYNAMIC_LOADING
-# define LINUX_DATA_START
- extern int _end;
-# define DATAEND (&_end)
+# define SEARCH_FOR_DATA_START
+ extern int _end[];
+# define DATAEND (_end)
# endif
# endif
# define DATAEND /* not needed */
# endif
-#ifdef LINUX_DATA_START
- /* Some Linux distributions arrange to define __data_start. Some */
- /* define data_start as a weak symbol. The latter is technically */
- /* broken, since the user program may define data_start, in which */
- /* case we lose. Nonetheless, we try both, prefering __data_start. */
- /* We assume gcc. */
-# pragma weak __data_start
- extern int __data_start;
-# pragma weak data_start
- extern int data_start;
-# define DATASTART ((ptr_t)(&__data_start != 0? &__data_start : &data_start))
-#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 */
# endif
# ifndef DATAEND
- extern int end;
-# define DATAEND (&end)
+ extern int end[];
+# define DATAEND (end)
# endif
# if defined(SVR4) && !defined(GETPAGESIZE)
# endif
# if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)
- /* OS has SVR4 generic features. Probably others also qualify. */
+ /* 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. */
+ /* OS has SUNOS5 style semi-undocumented interface to dynamic */
+ /* loader. */
# define SUNOS5DL
- /* OS has SUNOS5 style signal handlers. */
+ /* OS has SUNOS5 style signal handlers. */
# define SUNOS5SIGS
# endif
# endif
# if defined(SVR4) || defined(LINUX) || defined(IRIX) || defined(HPUX) \
- || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \
- || defined(BSD) || defined(_AIX) || defined(MACOSX) || defined(OSF1)
+ || 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
+ -> bad word size
# endif
# ifdef PCR
# endif
# ifdef SRC_M3
-/* Postponed for now. */
+ /* Postponed for now. */
# undef PROC_VDB
# undef MPROTECT_VDB
# endif
# ifdef SMALL_CONFIG
-/* Presumably not worth the space it takes. */
+ /* Presumably not worth the space it takes. */
# undef PROC_VDB
# undef MPROTECT_VDB
# endif
# 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;
+ ((word*)x)[0] = 0; \
+ ((word*)x)[1] = 0;
# endif /* CLEAR_DOUBLE */
-/* Internally we use GC_SOLARIS_THREADS to test for either old or pthreads. */
+ /* 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
+ --> inconsistent configuration
# endif
# if defined(GC_LINUX_THREADS) && !defined(LINUX)
---> inconsistent configuration
+ --> inconsistent configuration
# endif
# if defined(GC_SOLARIS_THREADS) && !defined(SUNOS5)
---> inconsistent configuration
+ --> inconsistent configuration
# endif
# if defined(GC_HPUX_THREADS) && !defined(HPUX)
---> inconsistent configuration
+ --> inconsistent configuration
+# endif
+# if defined(GC_AIX_THREADS) && !defined(_AIX)
+ --> inconsistent configuration
# endif
-# if defined(GC_WIN32_THREADS) && !defined(MSWIN32)
- /* Ideally CYGWIN32 should work, in addition to MSWIN32. I suspect */
- /* the necessary code is mostly there, but nobody has actually made */
- /* sure the right combination of pieces is compiled in, etc. */
---> inconsistent configuration
+# 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)
+ defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) || \
+ defined(GC_PTHREADS)
# define THREADS
# endif
-# if defined(HP_PA) || defined(M88K) || defined(POWERPC) && !defined(MACOSX) \
- || defined(LINT) || defined(MSWINCE) \
- || (defined(I386) && defined(__LCC__))
+# 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(I386) && 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. */
-# ifdef SAVE_CALL_COUNT
-# define SAVE_CALL_CHAIN
-# endif
-# endif
+
# if defined(SPARC)
-# define SAVE_CALL_CHAIN
# 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 */
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