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-rw-r--r--boehm-gc/gcconfig.h239
1 files changed, 189 insertions, 50 deletions
diff --git a/boehm-gc/gcconfig.h b/boehm-gc/gcconfig.h
index 25178d095ec..47398a6deba 100644
--- a/boehm-gc/gcconfig.h
+++ b/boehm-gc/gcconfig.h
@@ -69,15 +69,18 @@
# endif
# if defined(mips) || defined(__mips)
# define MIPS
-# if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
-# define ULTRIX
-# else
-# if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) || defined(__SYSTYPE_SVR4__)
-# define IRIX5 /* or IRIX 6.X */
-# else
-# define RISCOS /* or IRIX 4.X */
-# endif
-# endif
+# if !defined(LINUX)
+# if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
+# define ULTRIX
+# else
+# if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \
+ || defined(__SYSTYPE_SVR4__)
+# define IRIX5 /* or IRIX 6.X */
+# else
+# define RISCOS /* or IRIX 4.X */
+# endif
+# endif
+# endif /* !LINUX */
# define mach_type_known
# endif
# if defined(sequent) && defined(i386)
@@ -159,10 +162,14 @@
# define M68K
# define mach_type_known
# endif
-# if defined(LINUX) && defined(sparc)
+# 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(__alpha) || defined(__alpha__)
# define ALPHA
# if !defined(LINUX)
@@ -255,6 +262,11 @@
# 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
@@ -323,6 +335,9 @@
/* (CX_UX and DGUX) */
/* S370 ==> 370-like machine */
/* running Amdahl UTS4 */
+ /* ARM32 ==> Intel StrongARM */
+ /* IA64 ==> Intel IA64 */
+ /* (e.g. Itanium) */
/*
@@ -408,6 +423,15 @@
*
* 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.
*/
@@ -532,11 +556,9 @@
# undef STACK_GRAN
# define STACK_GRAN 0x10000000
/* Stack usually starts at 0x80000000 */
- extern int data_start;
-# define DATASTART (&data_start)
+# define LINUX_DATA_START
extern int _end;
# define DATAEND (&_end)
-# define DYNAMIC_LOADING
# endif
# ifdef MACOSX
# define ALIGNMENT 4
@@ -633,8 +655,8 @@
# ifdef LINUX
# define OS_TYPE "LINUX"
# ifdef __ELF__
-# define DATASTART GC_data_start
-# define DYNAMIC_LOADING
+# define LINUX_DATA_START
+# define DYNAMIC_LOADING
# else
Linux Sparc non elf ?
# endif
@@ -702,13 +724,16 @@
# endif
# ifdef LINUX
# define OS_TYPE "LINUX"
-# 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. */
+# 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(LINUX_THREADS) || !defined(REDIRECT_MALLOC)
/* libgcj: Linux threads don't interact well with the read() wrapper.
Not defining MPROTECT_VDB fixes this. */
@@ -726,8 +751,7 @@
# endif
# include <features.h>
# if defined(__GLIBC__) && __GLIBC__ >= 2
- extern int __data_start;
-# define DATASTART ((ptr_t)(&__data_start))
+# define LINUX_DATA_START
# else
extern char **__environ;
# define DATASTART ((ptr_t)(&__environ))
@@ -746,6 +770,26 @@
extern int etext;
# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
# endif
+# ifdef USE_I686_PREFETCH
+# define PREFETCH(x) \
+ __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(x)))
+ /* Empirically prefetcht0 is much more effective at reducing */
+ /* cache miss stalls for the targetted load instructions. But it */
+ /* seems to interfere enough with other cache traffic that the net */
+ /* result is worse than prefetchnta. */
+# if 0
+ /* Using prefetches for write seems to have a slight negative */
+ /* impact on performance, at least for a PIII/500. */
+# define PREFETCH_FOR_WRITE(x) \
+ __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char *)(x)))
+# endif
+# endif
+# ifdef USE_3DNOW_PREFETCH
+# define PREFETCH(x) \
+ __asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x)))
+# define PREFETCH_FOR_WRITE(x)
+ __asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x)))
+# endif
# endif
# ifdef CYGWIN32
# define OS_TYPE "CYGWIN32"
@@ -862,36 +906,48 @@
extern int _etext;
# define DATASTART ((ptr_t)(&_etext))
# else
-# ifndef IRIX5
+/* # define STACKBOTTOM ((ptr_t)0x7fff8000) sometimes also works. */
+# ifdef LINUX
+ /* 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 ALIGNMENT 4
+# define USE_GENERIC_PUSH_REGS 1
+# define STACKBOTTOM 0x80000000
+ /* In many cases, this should probably use LINUX_STACKBOTTOM */
+ /* instead. But some kernel versions seem to give the wrong */
+ /* value from /proc. */
+# endif /* Linux */
+# ifdef ULTRIX
+# define HEURISTIC2
# define DATASTART (ptr_t)0x10000000
/* Could probably be slightly higher since */
/* startup code allocates lots of stuff. */
-# else
+# define OS_TYPE "ULTRIX"
+# define ALIGNMENT 4
+# endif
+# ifdef RISCOS
+# define HEURISTIC2
+# define DATASTART (ptr_t)0x10000000
+# define OS_TYPE "RISCOS"
+# define ALIGNMENT 4 /* Required by hardware */
+# endif
+# ifdef IRIX5
+# define HEURISTIC2
extern int _fdata;
# define DATASTART ((ptr_t)(&_fdata))
# ifdef USE_MMAP
-# define HEAP_START (ptr_t)0x30000000
+# define HEAP_START (ptr_t)0x30000000
# else
-# define HEAP_START DATASTART
+# 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. */
-# endif /* IRIX5 */
-# endif /* DATASTART_IS_ETEXT */
-# define HEURISTIC2
-/* # define STACKBOTTOM ((ptr_t)0x7fff8000) sometimes also works. */
-# ifdef ULTRIX
-# define OS_TYPE "ULTRIX"
-# define ALIGNMENT 4
-# endif
-# ifdef RISCOS
-# define OS_TYPE "RISCOS"
-# define ALIGNMENT 4 /* Required by hardware */
-# endif
-# ifdef IRIX5
# define OS_TYPE "IRIX5"
# define MPROTECT_VDB
# ifdef _MIPS_SZPTR
@@ -906,6 +962,7 @@
# endif
# define DYNAMIC_LOADING
# endif
+# endif /* DATASTART_IS_ETEXT */
# endif /* ECOS */
# ifdef ECOS
extern char __ram_data_start;
@@ -963,12 +1020,16 @@
# endif
# include <unistd.h>
# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
- /* They misspelled the Posix macro? */
# endif
# ifdef ALPHA
# define MACH_TYPE "ALPHA"
# define ALIGNMENT 8
+# 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. */
# ifdef OSF1
# define OS_TYPE "OSF1"
# define DATASTART ((ptr_t) 0x140000000)
@@ -989,12 +1050,9 @@
# define CPP_WORDSZ 64
# define STACKBOTTOM ((ptr_t) 0x120000000)
# ifdef __ELF__
- /* glibc for Linux/Alpha no longer provides a symbol marking
- the start of the data segment. So libgcj defines
- data_start on its own (in libgcjdata.a). */
- extern int data_start;
-# define DATASTART &data_start
-# define DYNAMIC_LOADING
+# define LINUX_DATA_START
+# define DYNAMIC_LOADING
+ /* This doesn't work if the collector is in a dynamic library. */
# else
# define DATASTART ((ptr_t) 0x140000000)
# endif
@@ -1011,6 +1069,9 @@
# define ALIGN_DOUBLE
/* Requires 16 byte alignment for malloc */
# define ALIGNMENT 8
+# define USE_GENERIC_PUSH_REGS
+ /* We need to get preserved registers in addition to register windows. */
+ /* That's easiest to do with setjmp. */
# ifdef HPUX
--> needs work
# endif
@@ -1024,10 +1085,25 @@
/* backing store. There is probably a better way to */
/* get that, too ... */
# define BACKING_STORE_BASE ((ptr_t) 0x9fffffff80000000l)
-# define DATASTART GC_data_start
+# if 1
+# define SEARCH_FOR_DATA_START
+# define DATASTART GC_data_start
+# else
+ extern int data_start;
+# define DATASTART ((ptr_t)(&data_start))
+# endif
# define DYNAMIC_LOADING
+# define MPROTECT_VDB
+ /* Requires Linux 2.3.47 or later. */
extern int _end;
# define DATAEND (&_end)
+ /* PREFETCH appears to have a large performance impact. */
+# define PREFETCH(x) \
+ __asm__ (" lfetch [%0]": : "r"((void *)(x)))
+# define PREFETCH_FOR_WRITE(x) \
+ __asm__ (" lfetch.excl [%0]": : "r"((void *)(x)))
+# define CLEAR_DOUBLE(x) \
+ __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x)))
# endif
# endif
@@ -1079,6 +1155,49 @@
# define DATASTART ((ptr_t)(&etext))
# define USE_GENERIC_PUSH_REGS
# endif
+# ifdef LINUX
+# define OS_TYPE "LINUX"
+# define HEURISTIC1
+# undef STACK_GRAN
+# define STACK_GRAN 0x10000000
+# define USE_GENERIC_PUSH_REGS
+# ifdef __ELF__
+# define DYNAMIC_LOADING
+# include <features.h>
+# if defined(__GLIBC__) && __GLIBC__ >= 2
+# define LINUX_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
+#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
# ifndef STACK_GROWS_UP
@@ -1161,6 +1280,26 @@
# 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
+
+# ifndef CLEAR_DOUBLE
+# define CLEAR_DOUBLE(x) \
+ ((word*)x)[0] = 0; \
+ ((word*)x)[1] = 0;
+# endif /* CLEAR_DOUBLE */
+
# if defined(_SOLARIS_PTHREADS) && !defined(SOLARIS_THREADS)
# define SOLARIS_THREADS
# endif
@@ -1197,4 +1336,4 @@
/* include assembly code to do it well. */
# endif
-# endif
+# endif /* GCCONFIG_H */
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