by Patrick C. Beard.
*/
-/* Boehm, July 28, 1994 10:35 am PDT */
+/* Boehm, November 17, 1995 11:50 am PST */
#include <Resources.h>
#include <Memory.h>
char data[];
};
-TemporaryMemoryHandle theTemporaryMemory = NULL;
+static TemporaryMemoryHandle theTemporaryMemory = NULL;
+static Boolean firstTime = true;
-static void GC_MacFreeTemporaryMemory(void);
+void GC_MacFreeTemporaryMemory(void);
Ptr GC_MacTemporaryNewPtr(Size size, Boolean clearMemory)
{
return tempPtr;
}
-static void GC_MacFreeTemporaryMemory()
+void GC_MacFreeTemporaryMemory()
{
long totalMemoryUsed = 0;
TemporaryMemoryHandle tempMemBlock = theTemporaryMemory;
Test version.
+ <Revision History>
+
+ 11/16/95 pcb Updated compilation flags to reflect latest 4.6 Makefile.
+
by Patrick C. Beard.
*/
+/* Boehm, November 17, 1995 12:05 pm PST */
#ifdef __MWERKS__
#if defined(__powerc)
#undef TRUE
#undef FALSE
-#define ALL_INTERIOR_POINTERS // follows interior pointers.
-//#define SILENT // no collection messages.
-//#define DONT_ADD_BYTE_AT_END // no padding.
-//#define SMALL_CONFIG // use a smaller heap.
-#define USE_TEMPORARY_MEMORY // use Macintosh temporary memory.
+#define ALL_INTERIOR_POINTERS // follows interior pointers.
+//#define SILENT // want collection messages.
+//#define DONT_ADD_BYTE_AT_END // no padding.
+//#define SMALL_CONFIG // whether to a smaller heap.
+#define NO_SIGNALS // signals aren't real on the Macintosh.
+#define USE_TEMPORARY_MEMORY // use Macintosh temporary memory.
-// CFLAGS= -O -DALL_INTERIOR_POINTERS -DSILENT
+// CFLAGS= -O -DNO_SIGNALS -DALL_INTERIOR_POINTERS -DSILENT
+//
+//LIBGC_CFLAGS= -O -DNO_SIGNALS -DSILENT \
+// -DREDIRECT_MALLOC=GC_malloc_uncollectable \
+// -DDONT_ADD_BYTE_AT_END -DALL_INTERIOR_POINTERS
+// Flags for building libgc.a -- the last two are required.
+//
// Setjmp_test may yield overly optimistic results when compiled
// without optimization.
// -DSILENT disables statistics printing, and improves performance.
// -DCHECKSUMS reports on erroneously clear dirty bits, and unexpectedly
// altered stubborn objects, at substantial performance cost.
+// Use only for incremental collector debugging.
// -DFIND_LEAK causes the collector to assume that all inaccessible
-// objects should have been explicitly deallocated, and reports exceptions
+// objects should have been explicitly deallocated, and reports exceptions.
+// Finalization and the test program are not usable in this mode.
// -DSOLARIS_THREADS enables support for Solaris (thr_) threads.
// (Clients should also define SOLARIS_THREADS and then include
// gc.h before performing thr_ or GC_ operations.)
+// This is broken on nonSPARC machines.
// -DALL_INTERIOR_POINTERS allows all pointers to the interior
-// of objects to be recognized. (See gc_private.h for consequences.)
+// of objects to be recognized. (See gc_priv.h for consequences.)
// -DSMALL_CONFIG tries to tune the collector for small heap sizes,
// usually causing it to use less space in such situations.
// Incremental collection no longer works in this case.
+// -DLARGE_CONFIG tunes the collector for unusually large heaps.
+// Necessary for heaps larger than about 500 MB on most machines.
+// Recommended for heaps larger than about 64 MB.
// -DDONT_ADD_BYTE_AT_END is meaningful only with
// -DALL_INTERIOR_POINTERS. Normally -DALL_INTERIOR_POINTERS
// causes all objects to be padded so that pointers just past the end of
// an object can be recognized. This can be expensive. (The padding
// is normally more than one byte due to alignment constraints.)
// -DDONT_ADD_BYTE_AT_END disables the padding.
+// -DNO_SIGNALS does not disable signals during critical parts of
+// the GC process. This is no less correct than many malloc
+// implementations, and it sometimes has a significant performance
+// impact. However, it is dangerous for many not-quite-ANSI C
+// programs that call things like printf in asynchronous signal handlers.
+// -DOPERATOR_NEW_ARRAY declares that the C++ compiler supports the
+// new syntax "operator new[]" for allocating and deleting arrays.
+// See gc_cpp.h for details. No effect on the C part of the collector.
+// This is defined implicitly in a few environments.
+// -DREDIRECT_MALLOC=X causes malloc, realloc, and free to be defined
+// as aliases for X, GC_realloc, and GC_free, respectively.
+// Calloc is redefined in terms of the new malloc. X should
+// be either GC_malloc or GC_malloc_uncollectable.
+// The former is occasionally useful for working around leaks in code
+// you don't want to (or can't) look at. It may not work for
+// existing code, but it often does. Neither works on all platforms,
+// since some ports use malloc or calloc to obtain system memory.
+// (Probably works for UNIX, and win32.)
+// -DNO_DEBUG removes GC_dump and the debugging routines it calls.
+// Reduces code size slightly at the expense of debuggability.
\ No newline at end of file
Configuration flags for Macintosh development systems.
+ <Revision History>
+
+ 11/16/95 pcb Updated compilation flags to reflect latest 4.6 Makefile.
+
by Patrick C. Beard.
*/
+/* Boehm, November 17, 1995 12:10 pm PST */
#ifdef __MWERKS__
#if defined(__powerc)
#undef TRUE
#undef FALSE
-#define ALL_INTERIOR_POINTERS // follows interior pointers.
-#define SILENT // no collection messages.
-//#define DONT_ADD_BYTE_AT_END // no padding.
-//#define SMALL_CONFIG // use a smaller heap.
-#define USE_TEMPORARY_MEMORY // use Macintosh temporary memory.
+#define ALL_INTERIOR_POINTERS // follows interior pointers.
+#define SILENT // no collection messages.
+//#define DONT_ADD_BYTE_AT_END // no padding.
+//#define SMALL_CONFIG // whether to use a smaller heap.
+#define NO_SIGNALS // signals aren't real on the Macintosh.
+#define USE_TEMPORARY_MEMORY // use Macintosh temporary memory.
-// CFLAGS= -O -DALL_INTERIOR_POINTERS -DSILENT
+// CFLAGS= -O -DNO_SIGNALS -DSILENT -DALL_INTERIOR_POINTERS
+//
+//LIBGC_CFLAGS= -O -DNO_SIGNALS -DSILENT \
+// -DREDIRECT_MALLOC=GC_malloc_uncollectable \
+// -DDONT_ADD_BYTE_AT_END -DALL_INTERIOR_POINTERS
+// Flags for building libgc.a -- the last two are required.
+//
// Setjmp_test may yield overly optimistic results when compiled
// without optimization.
// -DSILENT disables statistics printing, and improves performance.
// -DCHECKSUMS reports on erroneously clear dirty bits, and unexpectedly
// altered stubborn objects, at substantial performance cost.
+// Use only for incremental collector debugging.
// -DFIND_LEAK causes the collector to assume that all inaccessible
-// objects should have been explicitly deallocated, and reports exceptions
+// objects should have been explicitly deallocated, and reports exceptions.
+// Finalization and the test program are not usable in this mode.
// -DSOLARIS_THREADS enables support for Solaris (thr_) threads.
// (Clients should also define SOLARIS_THREADS and then include
// gc.h before performing thr_ or GC_ operations.)
+// This is broken on nonSPARC machines.
// -DALL_INTERIOR_POINTERS allows all pointers to the interior
-// of objects to be recognized. (See gc_private.h for consequences.)
+// of objects to be recognized. (See gc_priv.h for consequences.)
// -DSMALL_CONFIG tries to tune the collector for small heap sizes,
// usually causing it to use less space in such situations.
// Incremental collection no longer works in this case.
+// -DLARGE_CONFIG tunes the collector for unusually large heaps.
+// Necessary for heaps larger than about 500 MB on most machines.
+// Recommended for heaps larger than about 64 MB.
// -DDONT_ADD_BYTE_AT_END is meaningful only with
// -DALL_INTERIOR_POINTERS. Normally -DALL_INTERIOR_POINTERS
// causes all objects to be padded so that pointers just past the end of
// an object can be recognized. This can be expensive. (The padding
// is normally more than one byte due to alignment constraints.)
// -DDONT_ADD_BYTE_AT_END disables the padding.
+// -DNO_SIGNALS does not disable signals during critical parts of
+// the GC process. This is no less correct than many malloc
+// implementations, and it sometimes has a significant performance
+// impact. However, it is dangerous for many not-quite-ANSI C
+// programs that call things like printf in asynchronous signal handlers.
+// -DOPERATOR_NEW_ARRAY declares that the C++ compiler supports the
+// new syntax "operator new[]" for allocating and deleting arrays.
+// See gc_cpp.h for details. No effect on the C part of the collector.
+// This is defined implicitly in a few environments.
+// -DREDIRECT_MALLOC=X causes malloc, realloc, and free to be defined
+// as aliases for X, GC_realloc, and GC_free, respectively.
+// Calloc is redefined in terms of the new malloc. X should
+// be either GC_malloc or GC_malloc_uncollectable.
+// The former is occasionally useful for working around leaks in code
+// you don't want to (or can't) look at. It may not work for
+// existing code, but it often does. Neither works on all platforms,
+// since some ports use malloc or calloc to obtain system memory.
+// (Probably works for UNIX, and win32.)
+// -DNO_DEBUG removes GC_dump and the debugging routines it calls.
+// Reduces code size slightly at the expense of debuggability.
\ No newline at end of file
provided the above notices are retained, and a notice that the code was
modified is included with the above copyright notice.
-This is version 4.6 of a conservative garbage collector for C and C++.
+This is version 4.7 of a conservative garbage collector for C and C++.
HISTORY -
first renames ALL "GC_xxx" identifiers as "_GC_xxx". The second is the
inverse transformation. Note that doing this is guaranteed to break all
clients written for the other names.
- - descriptor field for kinf NORMAL in GC_obj_kinds with ADD_BYTE_AT_END
+ - descriptor field for kind NORMAL in GC_obj_kinds with ADD_BYTE_AT_END
defined should be -ALIGNMENT not WORDS_TO_BYTES(-1). This is
a serious bug on machines with pointer alignment of less than a word.
- GC_ignore_self_finalize_mark_proc didn't handle pointers to very near the
- gc_inl.h still had problems. Partially fixed. Added warnings at the
beginning to hopefully specify the remaining dangers.
- Added DATAEND definition to config.h.
- - Fixed some of the .h file organization. Fixed "make floppy".
\ No newline at end of file
+ - Fixed some of the .h file organization. Fixed "make floppy".
+
+Since version 4.6:
+ - Fixed some compilation problems with -DCHECKSUMS (thanks to Ian Searle)
+ - Updated some Mac specific files to synchronize with Patrick Beard.
+ - Fixed a serious bug for machines with non-word-aligned pointers.
+ (Thanks to Patrick Beard for pointing out the problem. The collector
+ should fail almost any conceivable test immediately on such machines.)
}
GC_printf2("GC_bytes_in_used_blocks = %ld, bytes_in_free_blocks = %ld ",
GC_bytes_in_used_blocks, bytes_in_free_blocks);
- GC_printf("GC_heapsize = %ld\n", GC_heapsize);
+ GC_printf1("GC_heapsize = %ld\n", GC_heapsize);
if (GC_bytes_in_used_blocks + bytes_in_free_blocks != GC_heapsize) {
- GC_printf("LOST SOME BLOCKS!!\n");
+ GC_printf0("LOST SOME BLOCKS!!\n");
}
}
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*/
-/* Boehm, September 14, 1995 12:42 pm PDT */
+/* Boehm, November 17, 1995 12:13 pm PST */
# include "gc_priv.h"
# include <stdio.h>
# include <setjmp.h>
jsr GC_push_one
move.l a4,(sp)
jsr GC_push_one
- // <pcb> perhaps a6 should be pushed if stack frames arent being used.
- move.l a6,(sp)
- jsr GC_push_one
- // skip a5 (globals), and a7 (stack pointer)
+# if !__option(a6frames)
+ // <pcb> perhaps a6 should be pushed if stack frames aren't being used.
+ move.l a6,(sp)
+ jsr GC_push_one
+# endif
+ // skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
move.l d2,(sp)
jsr GC_push_one
move.l d3,(sp)
/* PTRFREE */ { &GC_aobjfreelist[0], 0 /* filled in dynamically */,
0 | DS_LENGTH, FALSE, FALSE },
/* NORMAL */ { &GC_objfreelist[0], 0,
-# ifdef ADD_BYTE_AT_END
+# if defined(ADD_BYTE_AT_END) && ALIGNMENT > DS_TAGS
(word)(-ALIGNMENT) | DS_LENGTH,
# else
0 | DS_LENGTH,
projects / gc / commitdiff