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authorivmai <ivmai>2011-01-05 11:03:44 +0100
committerIvan Maidanski <ivmai@mail.ru>2011-07-26 19:06:55 +0200
commitbddc75fb8c2e9f59797c9f6fd25aaed3b1778fd8 (patch)
tree5c95014588f87728a3014587c92052515d5dc258 /os_dep.c
parentce1f87461b04c05f8502b502e387dd1130e7830c (diff)
2011-01-05 Ivan Maidanski <ivmai@mail.ru>
* misc.c (GC_write): Replace multiple "ifdef/endif" with "elif" (for ECOS and NOSYS). * os_dep.c (GC_get_main_stack_base): Ditto. * os_dep.c (GC_get_main_stack_base): Check USE_GET_STACKBASE_FOR_MAIN macro before checking STACKBOTTOM one; remove "dummy" variable (use result one instead); reformat the code. * doc/README.macros (SN_TARGET_PS3): Document. * extra/threadlibs.c (main): Don't output "-lpthread" (and "-ldl") for Android. * include/private/pthread_support.h: Fix comment for "endif".
Diffstat (limited to 'os_dep.c')
-rw-r--r--os_dep.c470
1 files changed, 227 insertions, 243 deletions
diff --git a/os_dep.c b/os_dep.c
index 3a66831..b7f0fe9 100644
--- a/os_dep.c
+++ b/os_dep.c
@@ -382,39 +382,39 @@ GC_bool GC_enclosing_mapping(ptr_t addr, ptr_t *startp, ptr_t *endp)
}
#if defined(REDIRECT_MALLOC)
-/* Find the text(code) mapping for the library whose name, after */
-/* stripping the directory part, starts with nm. */
-GC_INNER GC_bool GC_text_mapping(char *nm, ptr_t *startp, ptr_t *endp)
-{
- size_t nm_len = strlen(nm);
- char *prot;
- char *map_path;
- ptr_t my_start, my_end;
- unsigned int maj_dev;
- char *maps = GC_get_maps();
- char *buf_ptr = maps;
-
- if (0 == maps) return(FALSE);
- for (;;) {
- buf_ptr = GC_parse_map_entry(buf_ptr, &my_start, &my_end,
- &prot, &maj_dev, &map_path);
+ /* Find the text(code) mapping for the library whose name, after */
+ /* stripping the directory part, starts with nm. */
+ GC_INNER GC_bool GC_text_mapping(char *nm, ptr_t *startp, ptr_t *endp)
+ {
+ size_t nm_len = strlen(nm);
+ char *prot;
+ char *map_path;
+ ptr_t my_start, my_end;
+ unsigned int maj_dev;
+ char *maps = GC_get_maps();
+ char *buf_ptr = maps;
- if (buf_ptr == NULL) return FALSE;
- if (prot[0] == 'r' && prot[1] == '-' && prot[2] == 'x') {
- char *p = map_path;
- /* Set p to point just past last slash, if any. */
- while (*p != '\0' && *p != '\n' && *p != ' ' && *p != '\t') ++p;
- while (*p != '/' && p >= map_path) --p;
- ++p;
- if (strncmp(nm, p, nm_len) == 0) {
- *startp = my_start;
- *endp = my_end;
- return TRUE;
- }
+ if (0 == maps) return(FALSE);
+ for (;;) {
+ buf_ptr = GC_parse_map_entry(buf_ptr, &my_start, &my_end,
+ &prot, &maj_dev, &map_path);
+
+ if (buf_ptr == NULL) return FALSE;
+ if (prot[0] == 'r' && prot[1] == '-' && prot[2] == 'x') {
+ char *p = map_path;
+ /* Set p to point just past last slash, if any. */
+ while (*p != '\0' && *p != '\n' && *p != ' ' && *p != '\t') ++p;
+ while (*p != '/' && p >= map_path) --p;
+ ++p;
+ if (strncmp(nm, p, nm_len) == 0) {
+ *startp = my_start;
+ *endp = my_end;
+ return TRUE;
+ }
+ }
}
+ return FALSE;
}
- return FALSE;
-}
#endif /* REDIRECT_MALLOC */
#ifdef IA64
@@ -474,31 +474,31 @@ GC_INNER GC_bool GC_text_mapping(char *nm, ptr_t *startp, ptr_t *endp)
}
#endif
-# ifdef ECOS
+#ifdef ECOS
# ifndef ECOS_GC_MEMORY_SIZE
-# define ECOS_GC_MEMORY_SIZE (448 * 1024)
+# define ECOS_GC_MEMORY_SIZE (448 * 1024)
# endif /* ECOS_GC_MEMORY_SIZE */
-/* FIXME: This is a simple way of allocating memory which is */
-/* compatible with ECOS early releases. Later releases use a more */
-/* sophisticated means of allocating memory than this simple static */
-/* allocator, but this method is at least bound to work. */
-static char ecos_gc_memory[ECOS_GC_MEMORY_SIZE];
-static char *ecos_gc_brk = ecos_gc_memory;
+ /* FIXME: This is a simple way of allocating memory which is */
+ /* compatible with ECOS early releases. Later releases use a more */
+ /* sophisticated means of allocating memory than this simple static */
+ /* allocator, but this method is at least bound to work. */
+ static char ecos_gc_memory[ECOS_GC_MEMORY_SIZE];
+ static char *ecos_gc_brk = ecos_gc_memory;
-static void *tiny_sbrk(ptrdiff_t increment)
-{
- void *p = ecos_gc_brk;
- ecos_gc_brk += increment;
- if (ecos_gc_brk > ecos_gc_memory + sizeof(ecos_gc_memory)) {
- ecos_gc_brk -= increment;
- return NULL;
+ static void *tiny_sbrk(ptrdiff_t increment)
+ {
+ void *p = ecos_gc_brk;
+ ecos_gc_brk += increment;
+ if (ecos_gc_brk > ecos_gc_memory + sizeof(ecos_gc_memory)) {
+ ecos_gc_brk -= increment;
+ return NULL;
+ }
+ return p;
}
- return p;
-}
-#define sbrk tiny_sbrk
-# endif /* ECOS */
+# define sbrk tiny_sbrk
+#endif /* ECOS */
#if defined(NETBSD) && defined(__ELF__)
ptr_t GC_data_start = NULL;
@@ -512,7 +512,7 @@ static void *tiny_sbrk(ptrdiff_t increment)
/* some versions. */
GC_data_start = GC_find_limit((ptr_t)&environ, FALSE);
}
-#endif
+#endif /* NETBSD */
#ifdef OPENBSD
static struct sigaction old_segv_act;
@@ -743,99 +743,94 @@ GC_INNER word GC_page_size = 0;
}
# endif
-# if defined(MSWIN32) || defined(MSWINCE) || defined(CYGWIN32)
+#if defined(MSWIN32) || defined(MSWINCE) || defined(CYGWIN32)
-#ifndef CYGWIN32
+# ifndef CYGWIN32
-# define is_writable(prot) ((prot) == PAGE_READWRITE \
+# define is_writable(prot) ((prot) == PAGE_READWRITE \
|| (prot) == PAGE_WRITECOPY \
|| (prot) == PAGE_EXECUTE_READWRITE \
|| (prot) == PAGE_EXECUTE_WRITECOPY)
-/* Return the number of bytes that are writable starting at p. */
-/* The pointer p is assumed to be page aligned. */
-/* If base is not 0, *base becomes the beginning of the */
-/* allocation region containing p. */
-STATIC word GC_get_writable_length(ptr_t p, ptr_t *base)
-{
- MEMORY_BASIC_INFORMATION buf;
- word result;
- word protect;
-
- result = VirtualQuery(p, &buf, sizeof(buf));
- if (result != sizeof(buf)) ABORT("Weird VirtualQuery result");
- if (base != 0) *base = (ptr_t)(buf.AllocationBase);
- protect = (buf.Protect & ~(PAGE_GUARD | PAGE_NOCACHE));
- if (!is_writable(protect)) {
+ /* Return the number of bytes that are writable starting at p. */
+ /* The pointer p is assumed to be page aligned. */
+ /* If base is not 0, *base becomes the beginning of the */
+ /* allocation region containing p. */
+ STATIC word GC_get_writable_length(ptr_t p, ptr_t *base)
+ {
+ MEMORY_BASIC_INFORMATION buf;
+ word result;
+ word protect;
+
+ result = VirtualQuery(p, &buf, sizeof(buf));
+ if (result != sizeof(buf)) ABORT("Weird VirtualQuery result");
+ if (base != 0) *base = (ptr_t)(buf.AllocationBase);
+ protect = (buf.Protect & ~(PAGE_GUARD | PAGE_NOCACHE));
+ if (!is_writable(protect)) {
return(0);
+ }
+ if (buf.State != MEM_COMMIT) return(0);
+ return(buf.RegionSize);
}
- if (buf.State != MEM_COMMIT) return(0);
- return(buf.RegionSize);
-}
-GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *sb)
-{
- int dummy;
- ptr_t sp = (ptr_t)(&dummy);
- ptr_t trunc_sp = (ptr_t)((word)sp & ~(GC_page_size - 1));
- /* FIXME: This won't work if called from a deeply recursive */
- /* client code (and the committed stack space has grown). */
- word size = GC_get_writable_length(trunc_sp, 0);
- GC_ASSERT(size != 0);
- sb -> mem_base = trunc_sp + size;
- return GC_SUCCESS;
-}
+ GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *sb)
+ {
+ int dummy;
+ ptr_t sp = (ptr_t)(&dummy);
+ ptr_t trunc_sp = (ptr_t)((word)sp & ~(GC_page_size - 1));
+ /* FIXME: This won't work if called from a deeply recursive */
+ /* client code (and the committed stack space has grown). */
+ word size = GC_get_writable_length(trunc_sp, 0);
+ GC_ASSERT(size != 0);
+ sb -> mem_base = trunc_sp + size;
+ return GC_SUCCESS;
+ }
-#else /* CYGWIN32 */
+# else /* CYGWIN32 */
-/* An alternate version for Cygwin (adapted from Dave Korn's */
-/* gcc version of boehm-gc). */
- GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *sb)
- {
- extern void * _tlsbase __asm__ ("%fs:4");
- sb -> mem_base = _tlsbase;
- return GC_SUCCESS;
- }
-
-#endif /* CYGWIN32 */
+ /* An alternate version for Cygwin (adapted from Dave Korn's */
+ /* gcc version of boehm-gc). */
+ GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *sb)
+ {
+ extern void * _tlsbase __asm__ ("%fs:4");
+ sb -> mem_base = _tlsbase;
+ return GC_SUCCESS;
+ }
+# endif /* CYGWIN32 */
# define HAVE_GET_STACK_BASE
-/* This is always called from the main thread. */
-ptr_t GC_get_main_stack_base(void)
-{
+ /* This is always called from the main thread. */
+ ptr_t GC_get_main_stack_base(void)
+ {
struct GC_stack_base sb;
GC_get_stack_base(&sb);
GC_ASSERT((void *)&sb HOTTER_THAN sb.mem_base);
return (ptr_t)sb.mem_base;
-}
-
-# endif /* MS Windows */
-
-# ifdef BEOS
-# include <kernel/OS.h>
- ptr_t GC_get_main_stack_base(void)
- {
- thread_info th;
- get_thread_info(find_thread(NULL),&th);
- return th.stack_end;
- }
-# endif /* BEOS */
-
+ }
+#endif /* MS Windows */
-# ifdef OS2
+#ifdef BEOS
+# include <kernel/OS.h>
+ ptr_t GC_get_main_stack_base(void)
+ {
+ thread_info th;
+ get_thread_info(find_thread(NULL),&th);
+ return th.stack_end;
+ }
+#endif /* BEOS */
-ptr_t GC_get_main_stack_base(void)
-{
+#ifdef OS2
+ ptr_t GC_get_main_stack_base(void)
+ {
PTIB ptib;
PPIB ppib;
if (DosGetInfoBlocks(&ptib, &ppib) != NO_ERROR) {
- ABORT("DosGetInfoBlocks failed");
+ ABORT("DosGetInfoBlocks failed");
}
return((ptr_t)(ptib -> tib_pstacklimit));
-}
-
-# endif /* OS2 */
+ }
+#endif /* OS2 */
# ifdef AMIGA
# define GC_AMIGA_SB
@@ -848,10 +843,10 @@ ptr_t GC_get_main_stack_base(void)
typedef void (*GC_fault_handler_t)(int);
# if defined(SUNOS5SIGS) || defined(IRIX5) || defined(OSF1) \
- || defined(HURD) || defined(NETBSD)
+ || defined(HURD) || defined(NETBSD)
static struct sigaction old_segv_act;
# if defined(_sigargs) /* !Irix6.x */ || defined(HPUX) \
- || defined(HURD) || defined(NETBSD) || defined(FREEBSD)
+ || defined(HURD) || defined(NETBSD) || defined(FREEBSD)
static struct sigaction old_bus_act;
# endif
# else
@@ -861,7 +856,7 @@ ptr_t GC_get_main_stack_base(void)
GC_INNER void GC_set_and_save_fault_handler(GC_fault_handler_t h)
{
# if defined(SUNOS5SIGS) || defined(IRIX5) \
- || defined(OSF1) || defined(HURD) || defined(NETBSD)
+ || defined(OSF1) || defined(HURD) || defined(NETBSD)
struct sigaction act;
act.sa_handler = h;
@@ -874,20 +869,20 @@ ptr_t GC_get_main_stack_base(void)
(void) sigemptyset(&act.sa_mask);
# ifdef GC_IRIX_THREADS
- /* Older versions have a bug related to retrieving and */
- /* and setting a handler at the same time. */
- (void) sigaction(SIGSEGV, 0, &old_segv_act);
- (void) sigaction(SIGSEGV, &act, 0);
+ /* Older versions have a bug related to retrieving and */
+ /* and setting a handler at the same time. */
+ (void) sigaction(SIGSEGV, 0, &old_segv_act);
+ (void) sigaction(SIGSEGV, &act, 0);
# else
- (void) sigaction(SIGSEGV, &act, &old_segv_act);
-# if defined(IRIX5) && defined(_sigargs) /* Irix 5.x, not 6.x */ \
- || defined(HPUX) || defined(HURD) || defined(NETBSD) \
- || defined(FREEBSD)
- /* Under Irix 5.x or HP/UX, we may get SIGBUS. */
- /* Pthreads doesn't exist under Irix 5.x, so we */
- /* don't have to worry in the threads case. */
- (void) sigaction(SIGBUS, &act, &old_bus_act);
-# endif
+ (void) sigaction(SIGSEGV, &act, &old_segv_act);
+# if defined(IRIX5) && defined(_sigargs) /* Irix 5.x, not 6.x */ \
+ || defined(HPUX) || defined(HURD) || defined(NETBSD) \
+ || defined(FREEBSD)
+ /* Under Irix 5.x or HP/UX, we may get SIGBUS. */
+ /* Pthreads doesn't exist under Irix 5.x, so we */
+ /* don't have to worry in the threads case. */
+ (void) sigaction(SIGBUS, &act, &old_bus_act);
+# endif
# endif /* GC_IRIX_THREADS */
# else
old_segv_handler = signal(SIGSEGV, h);
@@ -976,13 +971,6 @@ ptr_t GC_get_main_stack_base(void)
}
# endif
-#if defined(ECOS) || defined(NOSYS)
- ptr_t GC_get_main_stack_base(void)
- {
- return STACKBOTTOM;
- }
-#endif
-
#ifdef HPUX_STACKBOTTOM
#include <sys/param.h>
@@ -1119,12 +1107,12 @@ ptr_t GC_get_main_stack_base(void)
#ifdef FREEBSD_STACKBOTTOM
-/* This uses an undocumented sysctl call, but at least one expert */
-/* believes it will stay. */
+ /* This uses an undocumented sysctl call, but at least one expert */
+ /* believes it will stay. */
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/sysctl.h>
+# include <unistd.h>
+# include <sys/types.h>
+# include <sys/sysctl.h>
STATIC ptr_t GC_freebsd_stack_base(void)
{
@@ -1137,101 +1125,100 @@ ptr_t GC_get_main_stack_base(void)
return base;
}
-
#endif /* FREEBSD_STACKBOTTOM */
-#if !defined(BEOS) && !defined(AMIGA) && !defined(MSWIN32) \
- && !defined(MSWINCE) && !defined(OS2) && !defined(NOSYS) && !defined(ECOS) \
- && !defined(CYGWIN32) && !defined(GC_OPENBSD_THREADS) \
- && (!defined(GC_SOLARIS_THREADS) || defined(_STRICT_STDC))
-
-ptr_t GC_get_main_stack_base(void)
-{
+#if defined(ECOS) || defined(NOSYS)
+ ptr_t GC_get_main_stack_base(void)
+ {
+ return STACKBOTTOM;
+ }
+#elif !defined(BEOS) && !defined(AMIGA) && !defined(OS2) \
+ && !defined(MSWIN32) && !defined(MSWINCE) && !defined(CYGWIN32) \
+ && !defined(GC_OPENBSD_THREADS) \
+ && (!defined(GC_SOLARIS_THREADS) || defined(_STRICT_STDC))
+ ptr_t GC_get_main_stack_base(void)
+ {
+# ifndef STACKBOTTOM
+ ptr_t result; /* also used as "dummy" to get the approx. sp value */
+# endif
+# if defined(GC_LINUX_THREADS) && defined(USE_GET_STACKBASE_FOR_MAIN)
+ {
+ pthread_attr_t attr;
+ void *stackaddr;
+ size_t size;
+ if (pthread_getattr_np(pthread_self(), &attr) == 0) {
+ if (pthread_attr_getstack(&attr, &stackaddr, &size) == 0
+ && stackaddr != NULL) {
+ pthread_attr_destroy(&attr);
+# ifdef STACK_GROWS_DOWN
+ stackaddr = (char *)stackaddr + size;
+# endif
+ return (ptr_t)stackaddr;
+ }
+ pthread_attr_destroy(&attr);
+ }
+ WARN("pthread_getattr_np or pthread_attr_getstack failed"
+ " for main thread\n", 0);
+ }
+# endif
# ifdef STACKBOTTOM
- return(STACKBOTTOM);
+ return(STACKBOTTOM);
# else
-# if defined(HEURISTIC1) || defined(HEURISTIC2)
- word dummy;
-# endif
- ptr_t result;
-# define STACKBOTTOM_ALIGNMENT_M1 ((word)STACK_GRAN - 1)
-# ifdef HEURISTIC1
-# ifdef STACK_GROWS_DOWN
- result = (ptr_t)((((word)(&dummy))
- + STACKBOTTOM_ALIGNMENT_M1)
- & ~STACKBOTTOM_ALIGNMENT_M1);
-# else
- result = (ptr_t)(((word)(&dummy))
- & ~STACKBOTTOM_ALIGNMENT_M1);
-# endif
-# endif /* HEURISTIC1 */
-# ifdef LINUX_STACKBOTTOM
-# if defined(THREADS) && defined(USE_GET_STACKBASE_FOR_MAIN)
- {
- pthread_attr_t attr;
- void *stackaddr;
- size_t size;
- if (pthread_getattr_np(pthread_self(), &attr) == 0) {
- if (pthread_attr_getstack(&attr, &stackaddr, &size) == 0
- && stackaddr != NULL) {
- pthread_attr_destroy(&attr);
-# ifdef STACK_GROWS_DOWN
- stackaddr = (char *)stackaddr + size;
-# endif
- return (ptr_t)stackaddr;
- }
- pthread_attr_destroy(&attr);
- }
- WARN("pthread_getattr_np/pthread_attr_getstack failed"
- " for main thread\n", 0);
- }
-# endif
- result = GC_linux_stack_base();
-# endif
-# ifdef FREEBSD_STACKBOTTOM
- result = GC_freebsd_stack_base();
+# define STACKBOTTOM_ALIGNMENT_M1 ((word)STACK_GRAN - 1)
+# ifdef HEURISTIC1
+# ifdef STACK_GROWS_DOWN
+ result = (ptr_t)((((word)(&result)) + STACKBOTTOM_ALIGNMENT_M1)
+ & ~STACKBOTTOM_ALIGNMENT_M1);
+# else
+ result = (ptr_t)(((word)(&result)) & ~STACKBOTTOM_ALIGNMENT_M1);
# endif
-# ifdef HEURISTIC2
-# ifdef STACK_GROWS_DOWN
- result = GC_find_limit((ptr_t)(&dummy), TRUE);
-# ifdef HEURISTIC2_LIMIT
- if (result > HEURISTIC2_LIMIT
- && (ptr_t)(&dummy) < HEURISTIC2_LIMIT) {
- result = HEURISTIC2_LIMIT;
- }
-# endif
-# else
- result = GC_find_limit((ptr_t)(&dummy), FALSE);
-# ifdef HEURISTIC2_LIMIT
- if (result < HEURISTIC2_LIMIT
- && (ptr_t)(&dummy) > HEURISTIC2_LIMIT) {
- result = HEURISTIC2_LIMIT;
- }
-# endif
-# endif
-
-# endif /* HEURISTIC2 */
+# endif /* HEURISTIC1 */
+# ifdef LINUX_STACKBOTTOM
+ result = GC_linux_stack_base();
+# endif
+# ifdef FREEBSD_STACKBOTTOM
+ result = GC_freebsd_stack_base();
+# endif
+# ifdef HEURISTIC2
# ifdef STACK_GROWS_DOWN
- if (result == 0) result = (ptr_t)(signed_word)(-sizeof(ptr_t));
+ result = GC_find_limit((ptr_t)(&result), TRUE);
+# ifdef HEURISTIC2_LIMIT
+ if (result > HEURISTIC2_LIMIT
+ && (ptr_t)(&result) < HEURISTIC2_LIMIT) {
+ result = HEURISTIC2_LIMIT;
+ }
+# endif
+# else
+ result = GC_find_limit((ptr_t)(&result), FALSE);
+# ifdef HEURISTIC2_LIMIT
+ if (result < HEURISTIC2_LIMIT
+ && (ptr_t)(&result) > HEURISTIC2_LIMIT) {
+ result = HEURISTIC2_LIMIT;
+ }
+# endif
# endif
- return(result);
-# endif /* STACKBOTTOM */
-}
-
-# endif /* ! AMIGA, !OS 2, ! MS Windows, !BEOS, !NOSYS, !ECOS */
+# endif /* HEURISTIC2 */
+# ifdef STACK_GROWS_DOWN
+ if (result == 0)
+ result = (ptr_t)(signed_word)(-sizeof(ptr_t));
+# endif
+ return(result);
+# endif
+ }
+#endif /* !AMIGA, !BEOS, !OPENBSD, !OS2, !Windows */
#if defined(GC_LINUX_THREADS) && !defined(HAVE_GET_STACK_BASE)
-#include <pthread.h>
-/* extern int pthread_getattr_np(pthread_t, pthread_attr_t *); */
+# include <pthread.h>
+ /* extern int pthread_getattr_np(pthread_t, pthread_attr_t *); */
-#ifdef IA64
- GC_INNER ptr_t GC_greatest_stack_base_below(ptr_t bound);
+# ifdef IA64
+ GC_INNER ptr_t GC_greatest_stack_base_below(ptr_t bound);
/* From pthread_support.c */
-#endif
+# endif
-GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *b)
-{
+ GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *b)
+ {
pthread_attr_t attr;
size_t size;
# ifdef IA64
@@ -1275,10 +1262,9 @@ GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *b)
UNLOCK();
# endif
return GC_SUCCESS;
-}
+ }
# define HAVE_GET_STACK_BASE
-
#endif /* GC_LINUX_THREADS */
#ifdef GC_OPENBSD_THREADS
@@ -1306,7 +1292,6 @@ GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *b)
GC_ASSERT((void *)&sb HOTTER_THAN sb.mem_base);
return (ptr_t)sb.mem_base;
}
-
#endif /* GC_OPENBSD_THREADS */
#if defined(GC_SOLARIS_THREADS) && !defined(_STRICT_STDC)
@@ -1369,19 +1354,18 @@ GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *b)
GC_get_stack_base(&sb);
return (ptr_t)sb.mem_base;
}
-
#endif /* GC_SOLARIS_THREADS */
#ifndef HAVE_GET_STACK_BASE
-/* Retrieve stack base. */
-/* Using the GC_find_limit version is risky. */
-/* On IA64, for example, there is no guard page between the */
-/* stack of one thread and the register backing store of the */
-/* next. Thus this is likely to identify way too large a */
-/* "stack" and thus at least result in disastrous performance. */
-/* FIXME - Implement better strategies here. */
-GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *b)
-{
+ /* Retrieve stack base. */
+ /* Using the GC_find_limit version is risky. */
+ /* On IA64, for example, there is no guard page between the */
+ /* stack of one thread and the register backing store of the */
+ /* next. Thus this is likely to identify way too large a */
+ /* "stack" and thus at least result in disastrous performance. */
+ /* FIXME - Implement better strategies here. */
+ GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *b)
+ {
# ifdef NEED_FIND_LIMIT
int dummy;
IF_CANCEL(int cancel_state;)
@@ -1403,8 +1387,8 @@ GC_API int GC_CALL GC_get_stack_base(struct GC_stack_base *b)
# else
return GC_UNIMPLEMENTED;
# endif
-}
-#endif
+ }
+#endif /* !HAVE_GET_STACK_BASE */
/*
* Register static data segment(s) as roots.