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nest-open-source / nest-learning-thermostat / 5.0 / boost / 317601cb979f96545d0e892ce7cfdf59f676ee0a / . / boost_1_45_0 / tools / build / v2 / engine / src / boehm_gc / misc.c
blob: 37e509336a75f36ece673dfab9f3dbb0345528d3 [file] [log] [blame]
/*
* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
* Copyright (c) 1999-2001 by Hewlett-Packard Company. All rights reserved.
*
* 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.
*/
/* Boehm, July 31, 1995 5:02 pm PDT */
#include <stdio.h>
#include <limits.h>
#include <stdarg.h>
#ifndef _WIN32_WCE
#include <signal.h>
#endif
#define I_HIDE_POINTERS /* To make GC_call_with_alloc_lock visible */
#include "private/gc_pmark.h"
#ifdef GC_SOLARIS_THREADS
# include <sys/syscall.h>
#endif
#if defined(MSWIN32) || defined(MSWINCE)
# define WIN32_LEAN_AND_MEAN
# define NOSERVICE
# include <windows.h>
# include <tchar.h>
#endif
#ifdef UNIX_LIKE
# include <fcntl.h>
# include <sys/types.h>
# include <sys/stat.h>
int GC_log; /* Forward decl, so we can set it. */
#endif
#ifdef NONSTOP
# include <floss.h>
#endif
#if defined(THREADS) && defined(PCR)
# include "il/PCR_IL.h"
PCR_Th_ML GC_allocate_ml;
#endif
/* For other platforms with threads, the lock and possibly */
/* GC_lock_holder variables are defined in the thread support code. */
#if defined(NOSYS) || defined(ECOS)
#undef STACKBASE
#endif
/* Dont unnecessarily call GC_register_main_static_data() in case */
/* dyn_load.c isn't linked in. */
#ifdef DYNAMIC_LOADING
# define GC_REGISTER_MAIN_STATIC_DATA() GC_register_main_static_data()
#else
# define GC_REGISTER_MAIN_STATIC_DATA() TRUE
#endif
GC_FAR struct _GC_arrays GC_arrays /* = { 0 } */;
GC_bool GC_debugging_started = FALSE;
/* defined here so we don't have to load debug_malloc.o */
void (*GC_check_heap) (void) = (void (*) (void))0;
void (*GC_print_all_smashed) (void) = (void (*) (void))0;
void (*GC_start_call_back) (void) = (void (*) (void))0;
ptr_t GC_stackbottom = 0;
#ifdef IA64
ptr_t GC_register_stackbottom = 0;
#endif
GC_bool GC_dont_gc = 0;
GC_bool GC_dont_precollect = 0;
GC_bool GC_quiet = 0;
#ifndef SMALL_CONFIG
GC_bool GC_print_stats = 0;
#endif
GC_bool GC_print_back_height = 0;
#ifndef NO_DEBUGGING
GC_bool GC_dump_regularly = 0; /* Generate regular debugging dumps. */
#endif
#ifdef KEEP_BACK_PTRS
long GC_backtraces = 0; /* Number of random backtraces to */
/* generate for each GC. */
#endif
#ifdef FIND_LEAK
int GC_find_leak = 1;
#else
int GC_find_leak = 0;
#endif
#ifdef ALL_INTERIOR_POINTERS
int GC_all_interior_pointers = 1;
#else
int GC_all_interior_pointers = 0;
#endif
long GC_large_alloc_warn_interval = 5;
/* Interval between unsuppressed warnings. */
long GC_large_alloc_warn_suppressed = 0;
/* Number of warnings suppressed so far. */
/*ARGSUSED*/
void * GC_default_oom_fn(size_t bytes_requested)
{
return(0);
}
void * (*GC_oom_fn) (size_t bytes_requested) = GC_default_oom_fn;
void * GC_project2(void *arg1, void *arg2)
{
return arg2;
}
/* Set things up so that GC_size_map[i] >= granules(i), */
/* but not too much bigger */
/* and so that size_map contains relatively few distinct entries */
/* This was originally stolen from Russ Atkinson's Cedar */
/* quantization alogrithm (but we precompute it). */
void GC_init_size_map(void)
{
int i;
/* Map size 0 to something bigger. */
/* This avoids problems at lower levels. */
GC_size_map[0] = 1;
for (i = 1; i <= GRANULES_TO_BYTES(TINY_FREELISTS-1) - EXTRA_BYTES; i++) {
GC_size_map[i] = ROUNDED_UP_GRANULES(i);
GC_ASSERT(GC_size_map[i] < TINY_FREELISTS);
}
/* We leave the rest of the array to be filled in on demand. */
}
/* Fill in additional entries in GC_size_map, including the ith one */
/* We assume the ith entry is currently 0. */
/* Note that a filled in section of the array ending at n always */
/* has length at least n/4. */
void GC_extend_size_map(size_t i)
{
size_t orig_granule_sz = ROUNDED_UP_GRANULES(i);
size_t granule_sz = orig_granule_sz;
size_t byte_sz = GRANULES_TO_BYTES(granule_sz);
/* The size we try to preserve. */
/* Close to i, unless this would */
/* introduce too many distinct sizes. */
size_t smaller_than_i = byte_sz - (byte_sz >> 3);
size_t much_smaller_than_i = byte_sz - (byte_sz >> 2);
size_t low_limit; /* The lowest indexed entry we */
/* initialize. */
size_t j;
if (GC_size_map[smaller_than_i] == 0) {
low_limit = much_smaller_than_i;
while (GC_size_map[low_limit] != 0) low_limit++;
} else {
low_limit = smaller_than_i + 1;
while (GC_size_map[low_limit] != 0) low_limit++;
granule_sz = ROUNDED_UP_GRANULES(low_limit);
granule_sz += granule_sz >> 3;
if (granule_sz < orig_granule_sz) granule_sz = orig_granule_sz;
}
/* For these larger sizes, we use an even number of granules. */
/* This makes it easier to, for example, construct a 16byte-aligned */
/* allocator even if GRANULE_BYTES is 8. */
granule_sz += 1;
granule_sz &= ~1;
if (granule_sz > MAXOBJGRANULES) {
granule_sz = MAXOBJGRANULES;
}
/* If we can fit the same number of larger objects in a block, */
/* do so. */
{
size_t number_of_objs = HBLK_GRANULES/granule_sz;
granule_sz = HBLK_GRANULES/number_of_objs;
granule_sz &= ~1;
}
byte_sz = GRANULES_TO_BYTES(granule_sz);
/* We may need one extra byte; */
/* don't always fill in GC_size_map[byte_sz] */
byte_sz -= EXTRA_BYTES;
for (j = low_limit; j <= byte_sz; j++) GC_size_map[j] = granule_sz;
}
/*
* The following is a gross hack to deal with a problem that can occur
* on machines that are sloppy about stack frame sizes, notably SPARC.
* Bogus pointers may be written to the stack and not cleared for
* a LONG time, because they always fall into holes in stack frames
* that are not written. We partially address this by clearing
* sections of the stack whenever we get control.
*/
word GC_stack_last_cleared = 0; /* GC_no when we last did this */
# ifdef THREADS
# define BIG_CLEAR_SIZE 2048 /* Clear this much now and then. */
# define SMALL_CLEAR_SIZE 256 /* Clear this much every time. */
# endif
# define CLEAR_SIZE 213 /* Granularity for GC_clear_stack_inner */
# define DEGRADE_RATE 50
ptr_t GC_min_sp; /* Coolest stack pointer value from which we've */
/* already cleared the stack. */
ptr_t GC_high_water;
/* "hottest" stack pointer value we have seen */
/* recently. Degrades over time. */
word GC_bytes_allocd_at_reset;
#if defined(ASM_CLEAR_CODE)
extern void *GC_clear_stack_inner(void *, ptr_t);
#else
/* Clear the stack up to about limit. Return arg. */
/*ARGSUSED*/
void * GC_clear_stack_inner(void *arg, ptr_t limit)
{
word dummy[CLEAR_SIZE];
BZERO(dummy, CLEAR_SIZE*sizeof(word));
if ((ptr_t)(dummy) COOLER_THAN limit) {
(void) GC_clear_stack_inner(arg, limit);
}
/* Make sure the recursive call is not a tail call, and the bzero */
/* call is not recognized as dead code. */
GC_noop1((word)dummy);
return(arg);
}
#endif
/* Clear some of the inaccessible part of the stack. Returns its */
/* argument, so it can be used in a tail call position, hence clearing */
/* another frame. */
void * GC_clear_stack(void *arg)
{
ptr_t sp = GC_approx_sp(); /* Hotter than actual sp */
# ifdef THREADS
word dummy[SMALL_CLEAR_SIZE];
static unsigned random_no = 0;
/* Should be more random than it is ... */
/* Used to occasionally clear a bigger */
/* chunk. */
# endif
ptr_t limit;
# define SLOP 400
/* Extra bytes we clear every time. This clears our own */
/* activation record, and should cause more frequent */
/* clearing near the cold end of the stack, a good thing. */
# define GC_SLOP 4000
/* We make GC_high_water this much hotter than we really saw */
/* saw it, to cover for GC noise etc. above our current frame. */
# define CLEAR_THRESHOLD 100000
/* We restart the clearing process after this many bytes of */
/* allocation. Otherwise very heavily recursive programs */
/* with sparse stacks may result in heaps that grow almost */
/* without bounds. As the heap gets larger, collection */
/* frequency decreases, thus clearing frequency would decrease, */
/* thus more junk remains accessible, thus the heap gets */
/* larger ... */
# ifdef THREADS
if (++random_no % 13 == 0) {
limit = sp;
MAKE_HOTTER(limit, BIG_CLEAR_SIZE*sizeof(word));
limit = (ptr_t)((word)limit & ~0xf);
/* Make it sufficiently aligned for assembly */
/* implementations of GC_clear_stack_inner. */
return GC_clear_stack_inner(arg, limit);
} else {
BZERO(dummy, SMALL_CLEAR_SIZE*sizeof(word));
return arg;
}
# else
if (GC_gc_no > GC_stack_last_cleared) {
/* Start things over, so we clear the entire stack again */
if (GC_stack_last_cleared == 0) GC_high_water = (ptr_t)GC_stackbottom;
GC_min_sp = GC_high_water;
GC_stack_last_cleared = GC_gc_no;
GC_bytes_allocd_at_reset = GC_bytes_allocd;
}
/* Adjust GC_high_water */
MAKE_COOLER(GC_high_water, WORDS_TO_BYTES(DEGRADE_RATE) + GC_SLOP);
if (sp HOTTER_THAN GC_high_water) {
GC_high_water = sp;
}
MAKE_HOTTER(GC_high_water, GC_SLOP);
limit = GC_min_sp;
MAKE_HOTTER(limit, SLOP);
if (sp COOLER_THAN limit) {
limit = (ptr_t)((word)limit & ~0xf);
/* Make it sufficiently aligned for assembly */
/* implementations of GC_clear_stack_inner. */
GC_min_sp = sp;
return(GC_clear_stack_inner(arg, limit));
} else if (GC_bytes_allocd - GC_bytes_allocd_at_reset > CLEAR_THRESHOLD) {
/* Restart clearing process, but limit how much clearing we do. */
GC_min_sp = sp;
MAKE_HOTTER(GC_min_sp, CLEAR_THRESHOLD/4);
if (GC_min_sp HOTTER_THAN GC_high_water) GC_min_sp = GC_high_water;
GC_bytes_allocd_at_reset = GC_bytes_allocd;
}
return(arg);
# endif
}
/* Return a pointer to the base address of p, given a pointer to a */
/* an address within an object. Return 0 o.w. */
void * GC_base(void * p)
{
ptr_t r;
struct hblk *h;
bottom_index *bi;
hdr *candidate_hdr;
ptr_t limit;
r = p;
if (!GC_is_initialized) return 0;
h = HBLKPTR(r);
GET_BI(r, bi);
candidate_hdr = HDR_FROM_BI(bi, r);
if (candidate_hdr == 0) return(0);
/* If it's a pointer to the middle of a large object, move it */
/* to the beginning. */
while (IS_FORWARDING_ADDR_OR_NIL(candidate_hdr)) {
h = FORWARDED_ADDR(h,candidate_hdr);
r = (ptr_t)h;
candidate_hdr = HDR(h);
}
if (HBLK_IS_FREE(candidate_hdr)) return(0);
/* Make sure r points to the beginning of the object */
r = (ptr_t)((word)r & ~(WORDS_TO_BYTES(1) - 1));
{
size_t offset = HBLKDISPL(r);
signed_word sz = candidate_hdr -> hb_sz;
size_t obj_displ = offset % sz;
r -= obj_displ;
limit = r + sz;
if (limit > (ptr_t)(h + 1) && sz <= HBLKSIZE) {
return(0);
}
if ((ptr_t)p >= limit) return(0);
}
return((void *)r);
}
/* Return the size of an object, given a pointer to its base. */
/* (For small obects this also happens to work from interior pointers, */
/* but that shouldn't be relied upon.) */
size_t GC_size(void * p)
{
hdr * hhdr = HDR(p);
return hhdr -> hb_sz;
}
size_t GC_get_heap_size(void)
{
return GC_heapsize;
}
size_t GC_get_free_bytes(void)
{
return GC_large_free_bytes;
}
size_t GC_get_bytes_since_gc(void)
{
return GC_bytes_allocd;
}
size_t GC_get_total_bytes(void)
{
return GC_bytes_allocd+GC_bytes_allocd_before_gc;
}
GC_bool GC_is_initialized = FALSE;
# if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
extern void GC_init_parallel(void);
# endif /* PARALLEL_MARK || THREAD_LOCAL_ALLOC */
void GC_init(void)
{
DCL_LOCK_STATE;
#if defined(GC_WIN32_THREADS) && !defined(GC_PTHREADS)
if (!GC_is_initialized) {
BOOL (WINAPI *pfn) (LPCRITICAL_SECTION, DWORD) = NULL;
HMODULE hK32 = GetModuleHandleA("kernel32.dll");
if (hK32)
pfn = (BOOL (WINAPI *) (LPCRITICAL_SECTION, DWORD))
GetProcAddress (hK32,
"InitializeCriticalSectionAndSpinCount");
if (pfn)
pfn(&GC_allocate_ml, 4000);
else
InitializeCriticalSection (&GC_allocate_ml);
}
#endif /* MSWIN32 */
LOCK();
GC_init_inner();
UNLOCK();
# if defined(PARALLEL_MARK) || defined(THREAD_LOCAL_ALLOC)
/* Make sure marker threads and started and thread local */
/* allocation is initialized, in case we didn't get */
/* called from GC_init_parallel(); */
{
GC_init_parallel();
}
# endif /* PARALLEL_MARK || THREAD_LOCAL_ALLOC */
# if defined(DYNAMIC_LOADING) && defined(DARWIN)
{
/* This must be called WITHOUT the allocation lock held
and before any threads are created */
extern void GC_init_dyld();
GC_init_dyld();
}
# endif
}
#if defined(MSWIN32) || defined(MSWINCE)
CRITICAL_SECTION GC_write_cs;
#endif
#ifdef MSWIN32
extern void GC_init_win32(void);
#endif
extern void GC_setpagesize();
#ifdef MSWIN32
extern GC_bool GC_no_win32_dlls;
#else
# define GC_no_win32_dlls FALSE
#endif
void GC_exit_check(void)
{
GC_gcollect();
}
#ifdef SEARCH_FOR_DATA_START
extern void GC_init_linux_data_start(void);
#endif
#ifdef UNIX_LIKE
extern void GC_set_and_save_fault_handler(void (*handler)(int));
static void looping_handler(sig)
int sig;
{
GC_err_printf("Caught signal %d: looping in handler\n", sig);
for(;;);
}
static GC_bool installed_looping_handler = FALSE;
static void maybe_install_looping_handler()
{
/* Install looping handler before the write fault handler, so we */
/* handle write faults correctly. */
if (!installed_looping_handler && 0 != GETENV("GC_LOOP_ON_ABORT")) {
GC_set_and_save_fault_handler(looping_handler);
installed_looping_handler = TRUE;
}
}
#else /* !UNIX_LIKE */
# define maybe_install_looping_handler()
#endif
void GC_init_inner()
{
# if !defined(THREADS) && defined(GC_ASSERTIONS)
word dummy;
# endif
word initial_heap_sz = (word)MINHINCR;
if (GC_is_initialized) return;
# if defined(MSWIN32) || defined(MSWINCE)
InitializeCriticalSection(&GC_write_cs);
# endif
# if (!defined(SMALL_CONFIG))
if (0 != GETENV("GC_PRINT_STATS")) {
GC_print_stats = 1;
}
if (0 != GETENV("GC_PRINT_VERBOSE_STATS")) {
GC_print_stats = VERBOSE;
}
# if defined(UNIX_LIKE)
{
char * file_name = GETENV("GC_LOG_FILE");
if (0 != file_name) {
int log_d = open(file_name, O_CREAT|O_WRONLY|O_APPEND, 0666);
if (log_d < 0) {
GC_log_printf("Failed to open %s as log file\n", file_name);
} else {
GC_log = log_d;
}
}
}
# endif
# endif
# ifndef NO_DEBUGGING
if (0 != GETENV("GC_DUMP_REGULARLY")) {
GC_dump_regularly = 1;
}
# endif
# ifdef KEEP_BACK_PTRS
{
char * backtraces_string = GETENV("GC_BACKTRACES");
if (0 != backtraces_string) {
GC_backtraces = atol(backtraces_string);
if (backtraces_string[0] == '\0') GC_backtraces = 1;
}
}
# endif
if (0 != GETENV("GC_FIND_LEAK")) {
GC_find_leak = 1;
atexit(GC_exit_check);
}
if (0 != GETENV("GC_ALL_INTERIOR_POINTERS")) {
GC_all_interior_pointers = 1;
}
if (0 != GETENV("GC_DONT_GC")) {
GC_dont_gc = 1;
}
if (0 != GETENV("GC_PRINT_BACK_HEIGHT")) {
GC_print_back_height = 1;
}
if (0 != GETENV("GC_NO_BLACKLIST_WARNING")) {
GC_large_alloc_warn_interval = LONG_MAX;
}
{
char * addr_string = GETENV("GC_TRACE");
if (0 != addr_string) {
# ifndef ENABLE_TRACE
WARN("Tracing not enabled: Ignoring GC_TRACE value\n", 0);
# else
# ifdef STRTOULL
long long addr = strtoull(addr_string, NULL, 16);
# else
long addr = strtoul(addr_string, NULL, 16);
# endif
if (addr < 0x1000)
WARN("Unlikely trace address: 0x%lx\n", (GC_word)addr);
GC_trace_addr = (ptr_t)addr;
# endif
}
}
{
char * time_limit_string = GETENV("GC_PAUSE_TIME_TARGET");
if (0 != time_limit_string) {
long time_limit = atol(time_limit_string);
if (time_limit < 5) {
WARN("GC_PAUSE_TIME_TARGET environment variable value too small "
"or bad syntax: Ignoring\n", 0);
} else {
GC_time_limit = time_limit;
}
}
}
{
char * interval_string = GETENV("GC_LARGE_ALLOC_WARN_INTERVAL");
if (0 != interval_string) {
long interval = atol(interval_string);
if (interval <= 0) {
WARN("GC_LARGE_ALLOC_WARN_INTERVAL environment variable has "
"bad value: Ignoring\n", 0);
} else {
GC_large_alloc_warn_interval = interval;
}
}
}
maybe_install_looping_handler();
/* Adjust normal object descriptor for extra allocation. */
if (ALIGNMENT > GC_DS_TAGS && EXTRA_BYTES != 0) {
GC_obj_kinds[NORMAL].ok_descriptor = ((word)(-ALIGNMENT) | GC_DS_LENGTH);
}
GC_setpagesize();
GC_exclude_static_roots(beginGC_arrays, endGC_arrays);
GC_exclude_static_roots(beginGC_obj_kinds, endGC_obj_kinds);
# ifdef SEPARATE_GLOBALS
GC_exclude_static_roots(beginGC_objfreelist, endGC_objfreelist);
GC_exclude_static_roots(beginGC_aobjfreelist, endGC_aobjfreelist);
# endif
# ifdef MSWIN32
GC_init_win32();
# endif
# if defined(USE_PROC_FOR_LIBRARIES) && defined(GC_LINUX_THREADS)
WARN("USE_PROC_FOR_LIBRARIES + GC_LINUX_THREADS performs poorly.\n", 0);
/* If thread stacks are cached, they tend to be scanned in */
/* entirety as part of the root set. This wil grow them to */
/* maximum size, and is generally not desirable. */
# endif
# if defined(SEARCH_FOR_DATA_START)
GC_init_linux_data_start();
# endif
# if (defined(NETBSD) || defined(OPENBSD)) && defined(__ELF__)
GC_init_netbsd_elf();
# endif
# if !defined(THREADS) || defined(GC_PTHREADS) || defined(GC_WIN32_THREADS) \
|| defined(GC_SOLARIS_THREADS)
if (GC_stackbottom == 0) {
GC_stackbottom = GC_get_main_stack_base();
# if (defined(LINUX) || defined(HPUX)) && defined(IA64)
GC_register_stackbottom = GC_get_register_stack_base();
# endif
} else {
# if (defined(LINUX) || defined(HPUX)) && defined(IA64)
if (GC_register_stackbottom == 0) {
WARN("GC_register_stackbottom should be set with GC_stackbottom\n", 0);
/* The following may fail, since we may rely on */
/* alignment properties that may not hold with a user set */
/* GC_stackbottom. */
GC_register_stackbottom = GC_get_register_stack_base();
}
# endif
}
# endif
/* Ignore gcc -Wall warnings on the following. */
GC_STATIC_ASSERT(sizeof (ptr_t) == sizeof(word));
GC_STATIC_ASSERT(sizeof (signed_word) == sizeof(word));
GC_STATIC_ASSERT(sizeof (struct hblk) == HBLKSIZE);
# ifndef THREADS
# ifdef STACK_GROWS_DOWN
GC_ASSERT((word)(&dummy) <= (word)GC_stackbottom);
# else
GC_ASSERT((word)(&dummy) >= (word)GC_stackbottom);
# endif
# endif
# if !defined(_AUX_SOURCE) || defined(__GNUC__)
GC_ASSERT((word)(-1) > (word)0);
/* word should be unsigned */
# endif
GC_ASSERT((ptr_t)(word)(-1) > (ptr_t)0);
/* Ptr_t comparisons should behave as unsigned comparisons. */
GC_ASSERT((signed_word)(-1) < (signed_word)0);
# if !defined(SMALL_CONFIG)
if (GC_incremental || 0 != GETENV("GC_ENABLE_INCREMENTAL")) {
/* This used to test for !GC_no_win32_dlls. Why? */
GC_setpagesize();
/* For GWW_MPROTECT on Win32, this needs to happen before any */
/* heap memory is allocated. */
GC_dirty_init();
GC_ASSERT(GC_bytes_allocd == 0)
GC_incremental = TRUE;
}
# endif /* !SMALL_CONFIG */
/* Add initial guess of root sets. Do this first, since sbrk(0) */
/* might be used. */
if (GC_REGISTER_MAIN_STATIC_DATA()) GC_register_data_segments();
GC_init_headers();
GC_bl_init();
GC_mark_init();
{
char * sz_str = GETENV("GC_INITIAL_HEAP_SIZE");
if (sz_str != NULL) {
initial_heap_sz = atoi(sz_str);
if (initial_heap_sz <= MINHINCR * HBLKSIZE) {
WARN("Bad initial heap size %s - ignoring it.\n",
sz_str);
}
initial_heap_sz = divHBLKSZ(initial_heap_sz);
}
}
{
char * sz_str = GETENV("GC_MAXIMUM_HEAP_SIZE");
if (sz_str != NULL) {
word max_heap_sz = (word)atol(sz_str);
if (max_heap_sz < initial_heap_sz * HBLKSIZE) {
WARN("Bad maximum heap size %s - ignoring it.\n",
sz_str);
}
if (0 == GC_max_retries) GC_max_retries = 2;
GC_set_max_heap_size(max_heap_sz);
}
}
if (!GC_expand_hp_inner(initial_heap_sz)) {
GC_err_printf("Can't start up: not enough memory\n");
EXIT();
}
GC_initialize_offsets();
GC_register_displacement_inner(0L);
# if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC)
if (!GC_all_interior_pointers) {
/* TLS ABI uses pointer-sized offsets for dtv. */
GC_register_displacement_inner(sizeof(void *));
}
# endif
GC_init_size_map();
# ifdef PCR
if (PCR_IL_Lock(PCR_Bool_false, PCR_allSigsBlocked, PCR_waitForever)
!= PCR_ERes_okay) {
ABORT("Can't lock load state\n");
} else if (PCR_IL_Unlock() != PCR_ERes_okay) {
ABORT("Can't unlock load state\n");
}
PCR_IL_Unlock();
GC_pcr_install();
# endif
GC_is_initialized = TRUE;
# if defined(GC_PTHREADS) || defined(GC_WIN32_THREADS)
GC_thr_init();
# endif
COND_DUMP;
/* Get black list set up and/or incremental GC started */
if (!GC_dont_precollect || GC_incremental) GC_gcollect_inner();
# ifdef STUBBORN_ALLOC
GC_stubborn_init();
# endif
# if defined(GC_LINUX_THREADS) && defined(REDIRECT_MALLOC)
{
extern void GC_init_lib_bounds(void);
GC_init_lib_bounds();
}
# endif
/* Convince lint that some things are used */
# ifdef LINT
{
extern char * GC_copyright[];
extern int GC_read();
extern void GC_register_finalizer_no_order();
GC_noop(GC_copyright, GC_find_header,
GC_push_one, GC_call_with_alloc_lock, GC_read,
GC_dont_expand,
# ifndef NO_DEBUGGING
GC_dump,
# endif
GC_register_finalizer_no_order);
}
# endif
}
void GC_enable_incremental(void)
{
# if !defined(SMALL_CONFIG) && !defined(KEEP_BACK_PTRS)
/* If we are keeping back pointers, the GC itself dirties all */
/* pages on which objects have been marked, making */
/* incremental GC pointless. */
if (!GC_find_leak) {
DCL_LOCK_STATE;
LOCK();
if (GC_incremental) goto out;
GC_setpagesize();
/* if (GC_no_win32_dlls) goto out; Should be win32S test? */
maybe_install_looping_handler(); /* Before write fault handler! */
GC_incremental = TRUE;
if (!GC_is_initialized) {
GC_init_inner();
} else {
GC_dirty_init();
}
if (!GC_dirty_maintained) goto out;
if (GC_dont_gc) {
/* Can't easily do it. */
UNLOCK();
return;
}
if (GC_bytes_allocd > 0) {
/* There may be unmarked reachable objects */
GC_gcollect_inner();
} /* else we're OK in assuming everything's */
/* clean since nothing can point to an */
/* unmarked object. */
GC_read_dirty();
out:
UNLOCK();
} else {
GC_init();
}
# else
GC_init();
# endif
}
#if defined(MSWIN32) || defined(MSWINCE)
# if defined(_MSC_VER) && defined(_DEBUG)
# include <crtdbg.h>
# endif
# ifdef OLD_WIN32_LOG_FILE
# define LOG_FILE _T("gc.log")
# endif
HANDLE GC_stdout = 0;
void GC_deinit()
{
if (GC_is_initialized) {
DeleteCriticalSection(&GC_write_cs);
}
}
# ifndef THREADS
# define GC_need_to_lock 0 /* Not defined without threads */
# endif
int GC_write(const char *buf, size_t len)
{
BOOL tmp;
DWORD written;
if (len == 0)
return 0;
if (GC_need_to_lock) EnterCriticalSection(&GC_write_cs);
if (GC_stdout == INVALID_HANDLE_VALUE) {
if (GC_need_to_lock) LeaveCriticalSection(&GC_write_cs);
return -1;
} else if (GC_stdout == 0) {
char * file_name = GETENV("GC_LOG_FILE");
char logPath[_MAX_PATH + 5];
if (0 == file_name) {
# ifdef OLD_WIN32_LOG_FILE
strcpy(logPath, LOG_FILE);
# else
GetModuleFileName(NULL, logPath, _MAX_PATH);
strcat(logPath, ".log");
# endif
file_name = logPath;
}
GC_stdout = CreateFile(logPath, GENERIC_WRITE,
FILE_SHARE_READ,
NULL, CREATE_ALWAYS, FILE_FLAG_WRITE_THROUGH,
NULL);
if (GC_stdout == INVALID_HANDLE_VALUE)
ABORT("Open of log file failed");
}
tmp = WriteFile(GC_stdout, buf, (DWORD)len, &written, NULL);
if (!tmp)
DebugBreak();
# if defined(_MSC_VER) && defined(_DEBUG)
_CrtDbgReport(_CRT_WARN, NULL, 0, NULL, "%.*s", len, buf);
# endif
if (GC_need_to_lock) LeaveCriticalSection(&GC_write_cs);
return tmp ? (int)written : -1;
}
# undef GC_need_to_lock
#endif
#if defined(OS2) || defined(MACOS)
FILE * GC_stdout = NULL;
FILE * GC_stderr = NULL;
FILE * GC_log = NULL;
int GC_tmp; /* Should really be local ... */
void GC_set_files()
{
if (GC_stdout == NULL) {
GC_stdout = stdout;
}
if (GC_stderr == NULL) {
GC_stderr = stderr;
}
if (GC_log == NULL) {
GC_log = stderr;
}
}
#endif
#if !defined(OS2) && !defined(MACOS) && !defined(MSWIN32) && !defined(MSWINCE)
int GC_stdout = 1;
int GC_stderr = 2;
int GC_log = 2;
# if !defined(AMIGA)
# include <unistd.h>
# endif
#endif
#if !defined(MSWIN32) && !defined(MSWINCE) && !defined(OS2) \
&& !defined(MACOS) && !defined(ECOS) && !defined(NOSYS)
int GC_write(fd, buf, len)
int fd;
const char *buf;
size_t len;
{
register int bytes_written = 0;
register int result;
while (bytes_written < len) {
# ifdef GC_SOLARIS_THREADS
result = syscall(SYS_write, fd, buf + bytes_written,
len - bytes_written);
# else
result = write(fd, buf + bytes_written, len - bytes_written);
# endif
if (-1 == result) return(result);
bytes_written += result;
}
return(bytes_written);
}
#endif /* UN*X */
#ifdef ECOS
int GC_write(fd, buf, len)
{
_Jv_diag_write (buf, len);
return len;
}
#endif
#ifdef NOSYS
int GC_write(fd, buf, len)
{
/* No writing. */
return len;
}
#endif
#if defined(MSWIN32) || defined(MSWINCE)
/* FIXME: This is pretty ugly ... */
# define WRITE(f, buf, len) GC_write(buf, len)
#else
# if defined(OS2) || defined(MACOS)
# define WRITE(f, buf, len) (GC_set_files(), \
GC_tmp = fwrite((buf), 1, (len), (f)), \
fflush(f), GC_tmp)
# else
# define WRITE(f, buf, len) GC_write((f), (buf), (len))
# endif
#endif
#define BUFSZ 1024
#ifdef _MSC_VER
# define vsnprintf _vsnprintf
#endif
/* A version of printf that is unlikely to call malloc, and is thus safer */
/* to call from the collector in case malloc has been bound to GC_malloc. */
/* Floating point arguments ans formats should be avoided, since fp */
/* conversion is more likely to allocate. */
/* Assumes that no more than BUFSZ-1 characters are written at once. */
void GC_printf(const char *format, ...)
{
va_list args;
char buf[BUFSZ+1];
va_start(args, format);
if (GC_quiet) return;
buf[BUFSZ] = 0x15;
(void) vsnprintf(buf, BUFSZ, format, args);
va_end(args);
if (buf[BUFSZ] != 0x15) ABORT("GC_printf clobbered stack");
if (WRITE(GC_stdout, buf, strlen(buf)) < 0) ABORT("write to stdout failed");
}
void GC_err_printf(const char *format, ...)
{
va_list args;
char buf[BUFSZ+1];
va_start(args, format);
buf[BUFSZ] = 0x15;
(void) vsnprintf(buf, BUFSZ, format, args);
va_end(args);
if (buf[BUFSZ] != 0x15) ABORT("GC_printf clobbered stack");
if (WRITE(GC_stderr, buf, strlen(buf)) < 0) ABORT("write to stderr failed");
}
void GC_log_printf(const char *format, ...)
{
va_list args;
char buf[BUFSZ+1];
va_start(args, format);
buf[BUFSZ] = 0x15;
(void) vsnprintf(buf, BUFSZ, format, args);
va_end(args);
if (buf[BUFSZ] != 0x15) ABORT("GC_printf clobbered stack");
if (WRITE(GC_log, buf, strlen(buf)) < 0) ABORT("write to log failed");
}
void GC_err_puts(const char *s)
{
if (WRITE(GC_stderr, s, strlen(s)) < 0) ABORT("write to stderr failed");
}
#if defined(LINUX) && !defined(SMALL_CONFIG)
void GC_err_write(buf, len)
const char *buf;
size_t len;
{
if (WRITE(GC_stderr, buf, len) < 0) ABORT("write to stderr failed");
}
#endif
void GC_default_warn_proc(char *msg, GC_word arg)
{
GC_err_printf(msg, arg);
}
GC_warn_proc GC_current_warn_proc = GC_default_warn_proc;
GC_warn_proc GC_set_warn_proc(GC_warn_proc p)
{
GC_warn_proc result;
# ifdef GC_WIN32_THREADS
GC_ASSERT(GC_is_initialized);
# endif
LOCK();
result = GC_current_warn_proc;
GC_current_warn_proc = p;
UNLOCK();
return(result);
}
GC_word GC_set_free_space_divisor (GC_word value)
{
GC_word old = GC_free_space_divisor;
GC_free_space_divisor = value;
return old;
}
#ifndef PCR
void GC_abort(const char *msg)
{
# if defined(MSWIN32)
(void) MessageBoxA(NULL, msg, "Fatal error in gc", MB_ICONERROR|MB_OK);
# else
GC_err_printf("%s\n", msg);
# endif
if (GETENV("GC_LOOP_ON_ABORT") != NULL) {
/* In many cases it's easier to debug a running process. */
/* It's arguably nicer to sleep, but that makes it harder */
/* to look at the thread if the debugger doesn't know much */
/* about threads. */
for(;;) {}
}
# if defined(MSWIN32) || defined(MSWINCE)
DebugBreak();
# else
(void) abort();
# endif
}
#endif
void GC_enable()
{
LOCK();
GC_dont_gc--;
UNLOCK();
}
void GC_disable()
{
LOCK();
GC_dont_gc++;
UNLOCK();
}
/* Helper procedures for new kind creation. */
void ** GC_new_free_list_inner()
{
void *result = GC_INTERNAL_MALLOC((MAXOBJGRANULES+1)*sizeof(ptr_t),
PTRFREE);
if (result == 0) ABORT("Failed to allocate freelist for new kind");
BZERO(result, (MAXOBJGRANULES+1)*sizeof(ptr_t));
return result;
}
void ** GC_new_free_list()
{
void *result;
LOCK();
result = GC_new_free_list_inner();
UNLOCK();
return result;
}
unsigned GC_new_kind_inner(void **fl, GC_word descr, int adjust, int clear)
{
unsigned result = GC_n_kinds++;
if (GC_n_kinds > MAXOBJKINDS) ABORT("Too many kinds");
GC_obj_kinds[result].ok_freelist = fl;
GC_obj_kinds[result].ok_reclaim_list = 0;
GC_obj_kinds[result].ok_descriptor = descr;
GC_obj_kinds[result].ok_relocate_descr = adjust;
GC_obj_kinds[result].ok_init = clear;
return result;
}
unsigned GC_new_kind(void **fl, GC_word descr, int adjust, int clear)
{
unsigned result;
LOCK();
result = GC_new_kind_inner(fl, descr, adjust, clear);
UNLOCK();
return result;
}
unsigned GC_new_proc_inner(GC_mark_proc proc)
{
unsigned result = GC_n_mark_procs++;
if (GC_n_mark_procs > MAX_MARK_PROCS) ABORT("Too many mark procedures");
GC_mark_procs[result] = proc;
return result;
}
unsigned GC_new_proc(GC_mark_proc proc)
{
unsigned result;
LOCK();
result = GC_new_proc_inner(proc);
UNLOCK();
return result;
}
void * GC_call_with_stack_base(GC_stack_base_func fn, void *arg)
{
int dummy;
struct GC_stack_base base;
base.mem_base = (void *)&dummy;
# ifdef IA64
base.reg_base = (void *)GC_save_regs_in_stack();
/* Unnecessarily flushes register stack, */
/* but that probably doesn't hurt. */
# endif
return fn(&base, arg);
}
#if !defined(NO_DEBUGGING)
void GC_dump()
{
GC_printf("***Static roots:\n");
GC_print_static_roots();
GC_printf("\n***Heap sections:\n");
GC_print_heap_sects();
GC_printf("\n***Free blocks:\n");
GC_print_hblkfreelist();
GC_printf("\n***Blocks in use:\n");
GC_print_block_list();
GC_printf("\n***Finalization statistics:\n");
GC_print_finalization_stats();
}
#endif /* NO_DEBUGGING */