| /* |
| * 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) 2000-2004 Hewlett-Packard Development Company, L.P. |
| * |
| * 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; |
| # include <stddef.h> /* For size_t etc. */ |
| # 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__) || defined(__DragonFly__) || \ |
| defined(__FreeBSD_kernel__)) && !defined(FREEBSD) |
| # define FREEBSD |
| # endif |
| |
| /* Determine the machine type: */ |
| # if defined(__arm__) || defined(__thumb__) |
| # define ARM32 |
| # if !defined(LINUX) && !defined(NETBSD) |
| # define NOSYS |
| # define mach_type_known |
| # endif |
| # endif |
| # if defined(sun) && defined(mc68000) |
| # error SUNOS4 no longer supported |
| # endif |
| # if defined(hp9000s300) |
| # error M68K based HP machines no longer supported. |
| # 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) || 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__) || defined(__arm__)) |
| # define ARM32 |
| # define mach_type_known |
| # endif |
| # if defined(NETBSD) && defined(__sh__) |
| # define SH |
| # 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(__NetBSD__) && defined(__vax__) |
| # define VAX |
| # 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) && !defined(NETBSD) |
| # if defined(ultrix) || defined(__ultrix) |
| # define ULTRIX |
| # else |
| # define IRIX5 /* or IRIX 6.X */ |
| # 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 SOLARIS |
| # define mach_type_known |
| # endif |
| # if defined(sun) && defined(__amd64) |
| # define X86_64 |
| # define SOLARIS |
| # define mach_type_known |
| # endif |
| # if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__) |
| # define I386 |
| # define OS2 |
| # define mach_type_known |
| # endif |
| # if defined(ibm032) |
| # error IBM PC/RT no longer supported. |
| # endif |
| # if defined(sun) && (defined(sparc) || defined(__sparc)) |
| # define SPARC |
| /* Test for SunOS 5.x */ |
| # include <errno.h> |
| # define SOLARIS |
| # define mach_type_known |
| # endif |
| # if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \ |
| && !defined(__OpenBSD__) && !defined(__NetBSD__) && !defined(__FreeBSD__) \ |
| && !defined(__DragonFly__) |
| # define SPARC |
| # define DRSNX |
| # define mach_type_known |
| # endif |
| # if defined(_IBMR2) |
| # define POWERPC |
| # define AIX |
| # 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) |
| # error A/UX no longer supported |
| # endif |
| # if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \ |
| || defined(hppa) || defined(__hppa__) |
| # define HP_PA |
| # if !defined(LINUX) && !defined(HPUX) |
| # define HPUX |
| # endif |
| # define mach_type_known |
| # endif |
| # if defined(__ia64) && defined(_HPUX_SOURCE) |
| # define IA64 |
| # ifndef HPUX |
| # define HPUX |
| # endif |
| # 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(__cris__) |
| # ifndef CRIS |
| # define CRIS |
| # endif |
| # 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(FREEBSD) && (defined(powerpc) || defined(__powerpc__)) |
| # 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(LINUX) && defined(__m32r__) |
| # define M32R |
| # 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__)) |
| # define DARWIN |
| # if defined(__ppc__) || defined(__ppc64__) |
| # define POWERPC |
| # define mach_type_known |
| # elif defined(__x86_64__) |
| # define X86_64 |
| # define mach_type_known |
| # elif defined(__i386__) |
| # define I386 |
| # define mach_type_known |
| # endif |
| # 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(FREEBSD) && defined(__x86_64__) |
| # define X86_64 |
| # define mach_type_known |
| # endif |
| # if defined(__NetBSD__) && (defined(i386) || defined(__i386__)) |
| # define I386 |
| # define mach_type_known |
| # endif |
| # if defined(__NetBSD__) && defined(__x86_64__) |
| # define X86_64 |
| # define mach_type_known |
| # endif |
| # if defined(FREEBSD) && defined(__sparc__) |
| # define SPARC |
| # 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__) |
| # if defined(__LP64__) || defined(_WIN64) |
| # define X86_64 |
| # else |
| # define I386 |
| # endif |
| # define MSWIN32 /* or Win64 */ |
| # define mach_type_known |
| # endif |
| # if defined(_MSC_VER) && defined(_M_IA64) |
| # define IA64 |
| # define MSWIN32 /* Really win64, but we don't treat 64-bit */ |
| /* variants as a differnt platform. */ |
| # 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__) |
| # error PicoJava no longer supported |
| /* The implementation had problems, and I haven't heard of users */ |
| /* in ages. If you want it resurrected, let me know. */ |
| # 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 |
| # if defined(__TANDEM) |
| /* Nonstop S-series */ |
| /* FIXME: Should recognize Integrity series? */ |
| # define MIPS |
| # define NONSTOP |
| # define mach_type_known |
| # 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. */ |
| /* Macros such as LINUX, FREEBSD, etc. distinguish them. */ |
| /* SYSV on an M68K actually means A/UX. */ |
| /* The distinction in these cases is usually the stack starting address */ |
| # ifndef mach_type_known |
| # error "The collector has not been ported to this machine/OS combination." |
| # endif |
| /* Mapping is: M68K ==> Motorola 680X0 */ |
| /* (NEXT, and SYSV (A/UX), */ |
| /* MACOS and AMIGA variants) */ |
| /* I386 ==> Intel 386 */ |
| /* (SEQUENT, OS2, SCO, LINUX, NETBSD, */ |
| /* FREEBSD, THREE86BSD, MSWIN32, */ |
| /* BSDI,SOLARIS, NEXT, other variants) */ |
| /* NS32K ==> Encore Multimax */ |
| /* MIPS ==> R2000 through R14K */ |
| /* (many variants) */ |
| /* VAX ==> DEC VAX */ |
| /* (BSD, ULTRIX variants) */ |
| /* HP_PA ==> HP9000/700 & /800 */ |
| /* HP/UX, LINUX */ |
| /* SPARC ==> SPARC v7/v8/v9 */ |
| /* (SOLARIS, 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, AIX, NOSYS */ |
| /* variants) */ |
| /* Handles 32 and 64-bit variants. */ |
| /* CRIS ==> Axis Etrax */ |
| /* M32R ==> Renesas M32R */ |
| |
| |
| /* |
| * For each architecture and OS, the following need to be defined: |
| * |
| * CPP_WORDSZ 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_WORDSZ 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_WORDSZ 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;'' . |
| * 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. |
| * |
| * 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. |
| * GWW_VDB: Use win32 GetWriteWatch primitive. |
| * PROC_VDB: Use the SVR4 /proc primitives to read dirty bits. |
| * |
| * The first and second one may be combined, in which case a runtime |
| * selection will be made, based on GetWriteWatch availability. |
| * |
| * 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. |
| */ |
| # if defined(__GNUC__) && ((__GNUC__ >= 3) || \ |
| (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)) \ |
| && !defined(__INTEL_COMPILER) && !defined(__PATHCC__) |
| # 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 |
| # ifdef __ELF__ |
| # define DATASTART GC_data_start |
| # define DYNAMIC_LOADING |
| # else |
| extern char etext[]; |
| # define DATASTART ((ptr_t)(etext)) |
| # endif |
| # 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 |
| # ifdef LINUX |
| # define OS_TYPE "LINUX" |
| # define LINUX_STACKBOTTOM |
| # define MPROTECT_VDB |
| # 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 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 |
| |
| # if defined(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__) |
| # define ALIGNMENT 8 |
| # define CPP_WORDSZ 64 |
| # ifndef HBLKSIZE |
| # define HBLKSIZE 4096 |
| # endif |
| # else |
| # define ALIGNMENT 4 |
| # 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 OS_TYPE "DARWIN" |
| # define DYNAMIC_LOADING |
| # if defined(__ppc64__) |
| # define ALIGNMENT 8 |
| # define CPP_WORDSZ 64 |
| # define STACKBOTTOM ((ptr_t) 0x7fff5fc00000) |
| # define CACHE_LINE_SIZE 64 |
| # ifndef HBLKSIZE |
| # define HBLKSIZE 4096 |
| # endif |
| # else |
| # define ALIGNMENT 4 |
| # define STACKBOTTOM ((ptr_t) 0xc0000000) |
| # endif |
| /* 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 USE_MMAP |
| # define USE_MMAP_ANON |
| # ifdef GC_DARWIN_THREADS |
| # define MPROTECT_VDB |
| # endif |
| # 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 FREEBSD |
| # define ALIGNMENT 4 |
| # 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 ALIGNMENT 4 |
| # define OS_TYPE "NETBSD" |
| # define HEURISTIC2 |
| extern char etext[]; |
| # define DATASTART GC_data_start |
| # define DYNAMIC_LOADING |
| # endif |
| # ifdef AIX |
| # define OS_TYPE "AIX" |
| # undef ALIGNMENT /* in case it's defined */ |
| # 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 |
| # define USE_MMAP |
| # define USE_MMAP_ANON |
| /* 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 DYNAMIC_LOADING |
| /* For really old versions of AIX, this may have to be removed. */ |
| # 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 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 |
| /* Don't define USE_ASM_PUSH_REGS. We do use an asm helper, but */ |
| /* not to push the registers on the mark stack. */ |
| # ifdef SOLARIS |
| # define OS_TYPE "SOLARIS" |
| extern int _etext[]; |
| extern int _end[]; |
| extern ptr_t GC_SysVGetDataStart(size_t, ptr_t); |
| # define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)_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 DRSNX |
| # define OS_TYPE "DRSNX" |
| extern ptr_t GC_SysVGetDataStart(size_t, ptr_t); |
| extern int etext[]; |
| # define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)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(size_t, ptr_t); |
| # ifdef __arch64__ |
| # define DATASTART GC_SysVGetDataStart(0x100000, (ptr_t)_etext) |
| # else |
| # define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)_etext) |
| # endif |
| # define LINUX_STACKBOTTOM |
| # 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 |
| # ifdef FREEBSD |
| # define OS_TYPE "FREEBSD" |
| # define SIG_SUSPEND SIGUSR1 |
| # define SIG_THR_RESTART SIGUSR2 |
| # define FREEBSD_STACKBOTTOM |
| # ifdef __ELF__ |
| # define DYNAMIC_LOADING |
| # endif |
| 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 |
| # endif |
| |
| # ifdef I386 |
| # define MACH_TYPE "I386" |
| # if defined(__LP64__) || defined(_WIN64) |
| # error This should be handled as X86_64 |
| # else |
| # define CPP_WORDSZ 32 |
| # 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. */ |
| # 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 SOLARIS |
| # define OS_TYPE "SOLARIS" |
| extern int _etext[], _end[]; |
| extern ptr_t GC_SysVGetDataStart(size_t, ptr_t); |
| # define DATASTART GC_SysVGetDataStart(0x1000, (ptr_t)_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(size_t, ptr_t); |
| # define DATASTART GC_SysVGetDataStart(0x1000, (ptr_t)(&_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 |
| # 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 (ptr_t)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 |
| /* FIXME: Thus should use __builtin_prefetch, but we'll leave that */ |
| /* for the next rtelease. */ |
| # 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" |
| # define DATASTART ((ptr_t)GC_DATASTART) /* From gc.h */ |
| # define DATAEND ((ptr_t)GC_DATAEND) |
| # 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 */ |
| # endif |
| # ifdef MSWIN32 |
| # define OS_TYPE "MSWIN32" |
| /* STACKBOTTOM and DATASTART are handled specially in */ |
| /* os_dep.c. */ |
| # if !defined(__WATCOMC__) |
| # define MPROTECT_VDB |
| /* We also avoided doing this in the past with GC_WIN32_THREADS */ |
| /* Hopefully that's fixed. */ |
| # endif |
| # if _MSC_VER >= 1300 /* .NET, i.e. > VisualStudio 6 */ |
| # define GWW_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 |
| # ifdef __GLIBC__ |
| # define SIG_SUSPEND (32+6) |
| # define SIG_THR_RESTART (32+5) |
| extern int _end[]; |
| # define DATAEND (_end) |
| # else |
| # define SIG_SUSPEND SIGUSR1 |
| # define SIG_THR_RESTART SIGUSR2 |
| # endif |
| # define FREEBSD_STACKBOTTOM |
| # ifdef __ELF__ |
| # define DYNAMIC_LOADING |
| # endif |
| extern char etext[]; |
| extern char * GC_FreeBSDGetDataStart(size_t, ptr_t); |
| # define DATASTART GC_FreeBSDGetDataStart(0x1000, (ptr_t)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 |
| # define SIG_SUSPEND SIGUSR1 |
| # define SIG_THR_RESTART SIGUSR2 |
| # define SEARCH_FOR_DATA_START |
| extern int _end[]; |
| # define DATAEND ((ptr_t) (_end)) |
| /* # define MPROTECT_VDB Not quite working yet? */ |
| # define DYNAMIC_LOADING |
| # endif |
| # ifdef DARWIN |
| # define OS_TYPE "DARWIN" |
| # define DARWIN_DONT_PARSE_STACK |
| # 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 |
| # ifdef GC_DARWIN_THREADS |
| # define MPROTECT_VDB |
| # endif |
| # include <unistd.h> |
| # define GETPAGESIZE() getpagesize() |
| /* There seems to be some issues with trylock hanging on darwin. This |
| should be looked into some more */ |
| # define NO_PTHREAD_TRYLOCK |
| # endif /* DARWIN */ |
| # 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 |
| # 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" |
| # 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 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) |
| # else |
| # define ALIGNMENT 4 |
| # endif |
| # define DYNAMIC_LOADING |
| # endif |
| # ifdef MSWINCE |
| # define OS_TYPE "MSWINCE" |
| # define ALIGNMENT 4 |
| # define DATAEND /* not needed */ |
| # endif |
| # if defined(NETBSD) |
| # define OS_TYPE "NETBSD" |
| # define ALIGNMENT 4 |
| # define HEURISTIC2 |
| # 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 |
| # if defined(NONSTOP) |
| # define CPP_WORDSZ 32 |
| # define OS_TYPE "NONSTOP" |
| # define ALIGNMENT 4 |
| # define DATASTART ((ptr_t) 0x08000000) |
| extern char **environ; |
| # define DATAEND ((ptr_t)(environ - 0x10)) |
| # define STACKBOTTOM ((ptr_t) 0x4fffffff) |
| # endif |
| # 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 |
| # endif |
| # if !defined(GC_HPUX_THREADS) && !defined(GC_LINUX_THREADS) |
| # ifndef LINUX /* For now. */ |
| # define MPROTECT_VDB |
| # endif |
| # else |
| # 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 |
| # 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 LINUX_STACKBOTTOM |
| # 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" |
| # ifdef HPUX |
| # ifdef _ILP32 |
| # define CPP_WORDSZ 32 |
| /* Requires 8 byte alignment for malloc */ |
| # define ALIGNMENT 4 |
| # else |
| # ifndef _LP64 |
| ---> unknown ABI |
| # endif |
| # define CPP_WORDSZ 64 |
| /* 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 HPUX_STACKBOTTOM |
| # 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 |
| extern ptr_t GC_register_stackbottom; |
| # define BACKING_STORE_BASE GC_register_stackbottom |
| /* Known to be wrong for recent HP/UX versions!!! */ |
| # endif |
| # ifdef LINUX |
| # define CPP_WORDSZ 64 |
| # 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 ptr_t GC_register_stackbottom; |
| # define BACKING_STORE_BASE 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__ |
| # ifndef __INTEL_COMPILER |
| # define PREFETCH(x) \ |
| __asm__ (" lfetch [%0]": : "r"(x)) |
| # define PREFETCH_FOR_WRITE(x) \ |
| __asm__ (" lfetch.excl [%0]": : "r"(x)) |
| # define CLEAR_DOUBLE(x) \ |
| __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x))) |
| # else |
| # include <ia64intrin.h> |
| # define PREFETCH(x) \ |
| __lfetch(__lfhint_none, (x)) |
| # define PREFETCH_FOR_WRITE(x) \ |
| __lfetch(__lfhint_nta, (x)) |
| # define CLEAR_DOUBLE(x) \ |
| __stf_spill((void *)(x), 0) |
| # endif // __INTEL_COMPILER |
| # endif |
| # endif |
| # ifdef MSWIN32 |
| /* FIXME: This is a very partial guess. There is no port, yet. */ |
| # define OS_TYPE "MSWIN32" |
| /* STACKBOTTOM and DATASTART are handled specially in */ |
| /* os_dep.c. */ |
| # define DATAEND /* not needed */ |
| # if defined(_WIN64) |
| # define CPP_WORDSZ 64 |
| # else |
| # define CPP_WORDSZ 32 /* Is this possible? */ |
| # endif |
| # define ALIGNMENT 8 |
| # define STRTOULL _strtoui64 |
| # endif |
| # endif |
| |
| # ifdef M88K |
| # define MACH_TYPE "M88K" |
| # define ALIGNMENT 4 |
| 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(size_t, ptr_t); |
| # define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)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 */ |
| # ifdef UTS4 |
| # define OS_TYPE "UTS4" |
| extern int etext[]; |
| extern int _etext[]; |
| extern int _end[]; |
| extern ptr_t GC_SysVGetDataStart(size_t, ptr_t); |
| # define DATASTART GC_SysVGetDataStart(0x10000, (ptr_t)_etext) |
| # define DATAEND (_end) |
| # define HEURISTIC2 |
| # endif |
| # endif |
| |
| # ifdef S390 |
| # define MACH_TYPE "S390" |
| # ifndef __s390x__ |
| # define ALIGNMENT 4 |
| # define CPP_WORDSZ 32 |
| # else |
| # define ALIGNMENT 8 |
| # define CPP_WORDSZ 64 |
| # ifndef HBLKSIZE |
| # define HBLKSIZE 4096 |
| # endif |
| # 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 |
| |
| # ifdef ARM32 |
| # define CPP_WORDSZ 32 |
| # define MACH_TYPE "ARM32" |
| # define ALIGNMENT 4 |
| # 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 |
| # ifdef LINUX |
| # define OS_TYPE "LINUX" |
| # define LINUX_STACKBOTTOM |
| # undef STACK_GRAN |
| # define STACK_GRAN 0x10000000 |
| # 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) |
| /* __stack_base__ is set in newlib/libc/sys/arm/crt0.S */ |
| extern void *__stack_base__; |
| # define STACKBOTTOM ((ptr_t) (__stack_base__)) |
| # endif |
| #endif |
| |
| # ifdef CRIS |
| # define MACH_TYPE "CRIS" |
| # define CPP_WORDSZ 32 |
| # define ALIGNMENT 1 |
| # define OS_TYPE "LINUX" |
| # define DYNAMIC_LOADING |
| # define LINUX_STACKBOTTOM |
| # define SEARCH_FOR_DATA_START |
| extern int _end[]; |
| # define DATAEND (_end) |
| # 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 LINUX_STACKBOTTOM |
| # define DYNAMIC_LOADING |
| # define SEARCH_FOR_DATA_START |
| extern int _end[]; |
| # define DATAEND (_end) |
| # endif |
| # ifdef NETBSD |
| # define OS_TYPE "NETBSD" |
| # define HEURISTIC2 |
| # define DATASTART GC_data_start |
| # define DYNAMIC_LOADING |
| # endif |
| # endif |
| |
| # ifdef SH4 |
| # define MACH_TYPE "SH4" |
| # define OS_TYPE "MSWINCE" |
| # define ALIGNMENT 4 |
| # define DATAEND /* not needed */ |
| # endif |
| |
| # ifdef M32R |
| # define CPP_WORDSZ 32 |
| # define MACH_TYPE "M32R" |
| # define ALIGNMENT 4 |
| # ifdef LINUX |
| # define OS_TYPE "LINUX" |
| # define LINUX_STACKBOTTOM |
| # undef STACK_GRAN |
| # define STACK_GRAN 0x10000000 |
| # define DYNAMIC_LOADING |
| # define SEARCH_FOR_DATA_START |
| extern int _end[]; |
| # define DATAEND (_end) |
| # endif |
| # 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 |
| # 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 |
| # if defined(__GNUC__) && __GNUC__ >= 3 |
| # define PREFETCH(x) __builtin_prefetch((x), 0, 0) |
| # define PREFETCH_FOR_WRITE(x) __builtin_prefetch((x), 1) |
| # endif |
| # endif |
| # ifdef DARWIN |
| # define OS_TYPE "DARWIN" |
| # define DARWIN_DONT_PARSE_STACK |
| # 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) 0x7fff5fc00000) |
| # define USE_MMAP |
| # define USE_MMAP_ANON |
| # ifdef GC_DARWIN_THREADS |
| # define MPROTECT_VDB |
| # endif |
| # include <unistd.h> |
| # define GETPAGESIZE() getpagesize() |
| /* There seems to be some issues with trylock hanging on darwin. This |
| should be looked into some more */ |
| # define NO_PTHREAD_TRYLOCK |
| # endif |
| # ifdef FREEBSD |
| # define OS_TYPE "FREEBSD" |
| # ifndef GC_FREEBSD_THREADS |
| # define MPROTECT_VDB |
| # endif |
| # ifdef __GLIBC__ |
| # define SIG_SUSPEND (32+6) |
| # define SIG_THR_RESTART (32+5) |
| extern int _end[]; |
| # define DATAEND (_end) |
| # else |
| # define SIG_SUSPEND SIGUSR1 |
| # define SIG_THR_RESTART SIGUSR2 |
| # endif |
| # 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 |
| # define HEURISTIC2 |
| extern char etext[]; |
| # define SEARCH_FOR_DATA_START |
| # endif |
| # ifdef SOLARIS |
| # define OS_TYPE "SOLARIS" |
| # define ELF_CLASS ELFCLASS64 |
| extern int _etext[], _end[]; |
| extern ptr_t GC_SysVGetDataStart(size_t, ptr_t); |
| # define DATASTART GC_SysVGetDataStart(0x1000, (ptr_t)_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. */ |
| /* 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 |
| /* 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 MSWIN32 |
| # define OS_TYPE "MSWIN32" |
| /* STACKBOTTOM and DATASTART are handled specially in */ |
| /* os_dep.c. */ |
| # if !defined(__WATCOMC__) |
| # define MPROTECT_VDB |
| /* We also avoided doing this in the past with GC_WIN32_THREADS */ |
| /* Hopefully that's fixed. */ |
| # endif |
| # if _MSC_VER >= 1300 /* .NET, i.e. > VisualStudio 6 */ |
| # define GWW_VDB |
| # endif |
| # define DATAEND /* not needed */ |
| # endif |
| # endif |
| |
| #if defined(LINUX) && defined(USE_MMAP) |
| /* The kernel may do a somewhat better job merging mappings etc. */ |
| /* with anonymous mappings. */ |
| # define USE_MMAP_ANON |
| #endif |
| |
| #if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC) |
| /* Nptl allocates thread stacks with mmap, which is fine. But it */ |
| /* keeps a cache of thread stacks. Thread stacks contain the */ |
| /* thread control blocks. These in turn contain a pointer to */ |
| /* (sizeof (void *) from the beginning of) the dtv for thread-local */ |
| /* storage, which is calloc allocated. If we don't scan the cached */ |
| /* thread stacks, we appear to lose the dtv. This tends to */ |
| /* result in something that looks like a bogus dtv count, which */ |
| /* tends to result in a memset call on a block that is way too */ |
| /* large. Sometimes we're lucky and the process just dies ... */ |
| /* There seems to be a similar issue with some other memory */ |
| /* allocated by the dynamic loader. */ |
| /* This can be avoided by either: */ |
| /* - Defining USE_PROC_FOR_LIBRARIES here. */ |
| /* That performs very poorly, precisely because we end up */ |
| /* scanning cached stacks. */ |
| /* - Have calloc look at its callers. That is currently what we do.*/ |
| /* In spite of the fact that it is gross and disgusting. */ |
| /* # 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(SOLARIS) || defined(IRIX5) || defined(LINUX) \ |
| || defined(NETBSD) || defined(FREEBSD) || defined(HPUX) |
| # include <unistd.h> |
| # endif |
| # define GETPAGESIZE() getpagesize() |
| # endif |
| |
| # if defined(SOLARIS) || defined(DRSNX) || defined(UTS4) |
| /* OS has SVR4 generic features. */ |
| /* Probably others also qualify. */ |
| # define SVR4 |
| # endif |
| |
| # if defined(SOLARIS) || defined(DRSNX) |
| /* OS has SOLARIS style semi-undocumented interface */ |
| /* to dynamic loader. */ |
| # define SOLARISDL |
| /* OS has SOLARIS style signal handlers. */ |
| # define SUNOS5SIGS |
| # endif |
| |
| # if defined(HPUX) |
| # define SUNOS5SIGS |
| # endif |
| |
| # if defined(FREEBSD) && \ |
| (defined(__DragonFly__) || __FreeBSD__ >= 4 || (__FreeBSD_kernel__ >= 4)) |
| # define SUNOS5SIGS |
| # endif |
| |
| # ifdef GC_NETBSD_THREADS |
| # define SIGRTMIN 33 |
| # define SIGRTMAX 63 |
| # endif |
| |
| # if defined(SVR4) || defined(LINUX) || defined(IRIX5) || defined(HPUX) \ |
| || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \ |
| || defined(DGUX) || defined(BSD) \ |
| || defined(AIX) || defined(DARWIN) || defined(OSF1) \ |
| || defined(HURD) |
| # 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 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) \ |
| && !defined(GWW_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 |
| |
| # if defined(LINUX) || defined(HURD) || defined(__GLIBC__) |
| # 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 */ |
| |
| # if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC) \ |
| && !defined(INCLUDE_LINUX_THREAD_DESCR) |
| /* Will not work, since libc and the dynamic loader use thread */ |
| /* locals, sometimes as the only reference. */ |
| # define INCLUDE_LINUX_THREAD_DESCR |
| # endif |
| |
| # if defined(GC_IRIX_THREADS) && !defined(IRIX5) |
| --> inconsistent configuration |
| # endif |
| # if defined(GC_LINUX_THREADS) && !defined(LINUX) |
| --> inconsistent configuration |
| # endif |
| # if defined(GC_NETBSD_THREADS) && !defined(NETBSD) |
| --> inconsistent configuration |
| # endif |
| # if defined(GC_SOLARIS_THREADS) && !defined(SOLARIS) |
| --> 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_GNU_THREADS) && !defined(HURD) |
| --> inconsistent configuration |
| # endif |
| # if defined(GC_WIN32_THREADS) && !defined(MSWIN32) && !defined(CYGWIN32) |
| --> inconsistent configuration |
| # endif |
| |
| # if defined(PCR) || defined(GC_WIN32_THREADS) || defined(GC_PTHREADS) |
| # define THREADS |
| # endif |
| |
| # if !defined(USE_MARK_BITS) && !defined(USE_MARK_BYTES) |
| # if defined(THREADS) && defined(PARALLEL_MARK) |
| # define USE_MARK_BYTES |
| # else |
| # define USE_MARK_BITS |
| # endif |
| # endif |
| |
| # if defined(MSWINCE) |
| # define NO_GETENV |
| # 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) || defined(__GLIBC__)) |
| /* 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 |
| |
| # if !defined(MARK_BIT_PER_GRANULE) && !defined(MARK_BIT_PER_OBJ) |
| # define MARK_BIT_PER_GRANULE /* Usually faster */ |
| # endif |
| |
| /* Some static sanity tests. */ |
| # if defined(MARK_BIT_PER_GRANULE) && defined(MARK_BIT_PER_OBJ) |
| # error Define only one of MARK_BIT_PER_GRANULE and MARK_BIT_PER_OBJ. |
| # endif |
| |
| # if defined(STACK_GROWS_UP) && defined(STACK_GROWS_DOWN) |
| # error "Only one of STACK_GROWS_UP and STACK_GROWS_DOWN should be defd." |
| # endif |
| # if !defined(STACK_GROWS_UP) && !defined(STACK_GROWS_DOWN) |
| # error "One of STACK_GROWS_UP and STACK_GROWS_DOWN should be defd." |
| # endif |
| |
| # if defined(REDIRECT_MALLOC) && defined(THREADS) && !defined(LINUX) |
| # error "REDIRECT_MALLOC with THREADS works at most on Linux." |
| # 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. */ |
| # if defined(PCR) |
| char * real_malloc(); |
| # define GET_MEM(bytes) HBLKPTR(real_malloc((size_t)bytes + GC_page_size) \ |
| + GC_page_size-1) |
| # elif defined(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) |
| # elif defined(NEXT) || defined(DOS4GW) || defined(NONSTOP) || \ |
| (defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) || \ |
| (defined(SOLARIS) && !defined(USE_MMAP)) |
| # define GET_MEM(bytes) HBLKPTR((size_t) calloc(1, (size_t)bytes + GC_page_size) \ |
| + GC_page_size-1) |
| # elif defined(MSWIN32) |
| extern ptr_t GC_win32_get_mem(); |
| # define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes) |
| # elif defined(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 |
| # elif defined(MSWINCE) |
| extern ptr_t GC_wince_get_mem(); |
| # define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes) |
| # elif 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 /* GC_PRIVATE_H */ |
| |
| # endif /* GCCONFIG_H */ |
