/
runtime.c
9192 lines (6959 loc) · 216 KB
/
runtime.c
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/* runtime.c - Runtime code for compiler generated executables
;
; Copyright (c) 2000-2007, Felix L. Winkelmann
; Copyright (c) 2008-2009, The Chicken Team
; All rights reserved.
;
; Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following
; conditions are met:
;
; Redistributions of source code must retain the above copyright notice, this list of conditions and the following
; disclaimer.
; Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following
; disclaimer in the documentation and/or other materials provided with the distribution.
; Neither the name of the author nor the names of its contributors may be used to endorse or promote
; products derived from this software without specific prior written permission.
;
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
; OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
; AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
; OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
; POSSIBILITY OF SUCH DAMAGE.
*/
#include "chicken.h"
#include <errno.h>
#include <signal.h>
#include <assert.h>
#include <limits.h>
#include <math.h>
#ifdef HAVE_SYSEXITS_H
# include <sysexits.h>
#endif
#if !defined(PIC)
# define NO_DLOAD2
#endif
#ifndef NO_DLOAD2
# ifdef HAVE_DLFCN_H
# include <dlfcn.h>
# endif
# ifdef HAVE_DL_H
# include <dl.h>
# endif
#endif
#ifndef EX_SOFTWARE
# define EX_SOFTWARE 70
#endif
#if !defined(C_NONUNIX)
# include <sys/types.h>
# include <sys/stat.h>
# include <sys/time.h>
# include <sys/resource.h>
# include <sys/wait.h>
#else
# include <sys/types.h>
# include <sys/stat.h>
#ifdef ECOS
#include <cyg/kernel/kapi.h>
static C_TLS int timezone;
#define NSIG 32
#endif
#endif
#ifndef RTLD_GLOBAL
# define RTLD_GLOBAL 0
#endif
#ifndef RTLD_NOW
# define RTLD_NOW 0
#endif
#ifndef RTLD_LOCAL
# define RTLD_LOCAL 0
#endif
#ifndef RTLD_LAZY
# define RTLD_LAZY 0
#endif
#ifdef HAVE_WINDOWS_H
# include <windows.h>
#endif
#ifdef HAVE_CONFIG_H
# ifdef PACKAGE
# undef PACKAGE
# endif
# ifdef VERSION
# undef VERSION
# endif
# include <chicken-config.h>
# ifndef HAVE_ALLOCA
# error this package requires "alloca()"
# endif
#endif
#ifdef _MSC_VER
# define S_IFMT _S_IFMT
# define S_IFDIR _S_IFDIR
# define timezone _timezone
# if defined(_M_IX86)
# ifndef C_HACKED_APPLY
# define C_HACKED_APPLY
# endif
# endif
#else
# ifdef C_HACKED_APPLY
# if defined(__MACH__) || defined(__MINGW32__) || defined(__CYGWIN__)
extern void C_do_apply_hack(void *proc, C_word *args, int count) C_noret;
# else
extern void _C_do_apply_hack(void *proc, C_word *args, int count) C_noret;
# define C_do_apply_hack _C_do_apply_hack
# endif
# endif
#endif
#if defined(C_NO_HACKED_APPLY) && defined(C_HACKED_APPLY)
# undef C_HACKED_APPLY
#endif
/* Parameters: */
#define RELAX_MULTIVAL_CHECK
#define DEFAULT_STACK_SIZE 64000
#define DEFAULT_SYMBOL_TABLE_SIZE 2999
#define DEFAULT_HEAP_SIZE 500000
#define MINIMAL_HEAP_SIZE 500000
#define DEFAULT_MAXIMAL_HEAP_SIZE 0x7ffffff0
#define DEFAULT_HEAP_GROWTH 200
#define DEFAULT_HEAP_SHRINKAGE 50
#define DEFAULT_HEAP_SHRINKAGE_USED 25
#define DEFAULT_FORWARDING_TABLE_SIZE 32
#define DEFAULT_LOCATIVE_TABLE_SIZE 32
#define DEFAULT_COLLECTIBLES_SIZE 1024
#define DEFAULT_TRACE_BUFFER_SIZE 8
#define MAX_HASH_PREFIX 64
#define WEAK_TABLE_SIZE 997
#define WEAK_HASH_ITERATIONS 4
#define WEAK_HASH_DISPLACEMENT 7
#define WEAK_COUNTER_MASK 3
#define WEAK_COUNTER_MAX 2
#define TEMPORARY_STACK_SIZE 2048
#define STRING_BUFFER_SIZE 4096
#define DEFAULT_MUTATION_STACK_SIZE 1024
#define MUTATION_STACK_GROWTH 1024
#define FILE_INFO_SIZE 7
#ifdef C_DOUBLE_IS_32_BITS
# define FLONUM_PRINT_PRECISION 7
#else
# define FLONUM_PRINT_PRECISION 15
#endif
#define WORDS_PER_FLONUM C_SIZEOF_FLONUM
#define MAXIMAL_NUMBER_OF_COMMAND_LINE_ARGUMENTS 32
#define INITIAL_TIMER_INTERRUPT_PERIOD 10000
/* Constants: */
#ifdef C_SIXTY_FOUR
# define ALIGNMENT_HOLE_MARKER ((C_word)0xfffffffffffffffeL)
# define FORWARDING_BIT_SHIFT 63
# define UWORD_FORMAT_STRING "0x%lx"
# define UWORD_COUNT_FORMAT_STRING "%ld"
#else
# define ALIGNMENT_HOLE_MARKER ((C_word)0xfffffffe)
# define FORWARDING_BIT_SHIFT 31
# define UWORD_FORMAT_STRING "0x%x"
# define UWORD_COUNT_FORMAT_STRING "%d"
#endif
#define GC_MINOR 0
#define GC_MAJOR 1
#define GC_REALLOC 2
/* Macros: */
#ifdef PARANOIA
# define check_alignment(p) assert(((C_word)(p) & 3) == 0)
#else
# ifndef NDEBUG
# define NDEBUG
# endif
# define check_alignment(p)
#endif
#define aligned8(n) ((((C_word)(n)) & 7) == 0)
#define nmax(x, y) ((x) > (y) ? (x) : (y))
#define nmin(x, y) ((x) < (y) ? (x) : (y))
#define percentage(n, p) ((long)(((double)(n) * (double)p) / 100))
#define is_fptr(x) (((x) & C_GC_FORWARDING_BIT) != 0)
#define ptr_to_fptr(x) ((((x) >> FORWARDING_BIT_SHIFT) & 1) | C_GC_FORWARDING_BIT | ((x) & ~1))
#define fptr_to_ptr(x) (((x) << FORWARDING_BIT_SHIFT) | ((x) & ~(C_GC_FORWARDING_BIT | 1)))
#ifdef C_UNSAFE_RUNTIME
# define C_check_flonum(x, w)
# define C_check_real(x, w, v) if(((x) & C_FIXNUM_BIT) != 0) v = C_unfix(x); \
else v = C_flonum_magnitude(x);
# define resolve_procedure(x, w) (x)
#else
# define C_check_flonum(x, w) if(C_immediatep(x) || C_block_header(x) != C_FLONUM_TAG) \
barf(C_BAD_ARGUMENT_TYPE_NO_FLONUM_ERROR, w, x);
# define C_check_real(x, w, v) if(((x) & C_FIXNUM_BIT) != 0) v = C_unfix(x); \
else if(C_immediatep(x) || C_block_header(x) != C_FLONUM_TAG) \
barf(C_BAD_ARGUMENT_TYPE_NO_NUMBER_ERROR, w, x); \
else v = C_flonum_magnitude(x);
#endif
#define C_isnan(f) (!((f) == (f)))
#define C_isinf(f) ((f) == (f) + (f) && (f) != 0.0)
/* these could be shorter in unsafe mode: */
#define C_check_int(x, f, n, w) if(((x) & C_FIXNUM_BIT) != 0) n = C_unfix(x); \
else if(C_immediatep(x) || C_block_header(x) != C_FLONUM_TAG) \
barf(C_BAD_ARGUMENT_TYPE_NO_NUMBER_ERROR, w, x); \
else { double _m; \
f = C_flonum_magnitude(x); \
if(modf(f, &_m) != 0.0 || f < C_WORD_MIN || f > C_WORD_MAX) \
barf(C_BAD_ARGUMENT_TYPE_NO_INTEGER_ERROR, w, x); \
else n = (C_word)f; \
}
#ifdef BITWISE_UINT_ONLY
#define C_check_uint(x, f, n, w) if(((x) & C_FIXNUM_BIT) != 0) n = C_unfix(x); \
else if(C_immediatep(x) || C_block_header(x) != C_FLONUM_TAG) \
barf(C_BAD_ARGUMENT_TYPE_NO_NUMBER_ERROR, w, x); \
else { double _m; \
f = C_flonum_magnitude(x); \
if(modf(f, &_m) != 0.0 || f < 0 || f > C_UWORD_MAX) \
barf(C_BAD_ARGUMENT_TYPE_NO_UINTEGER_ERROR, w, x); \
else n = (C_uword)f; \
}
#else
#define C_check_uint(x, f, n, w) if(((x) & C_FIXNUM_BIT) != 0) n = C_unfix(x); \
else if(C_immediatep(x) || C_block_header(x) != C_FLONUM_TAG) \
barf(C_BAD_ARGUMENT_TYPE_NO_NUMBER_ERROR, w, x); \
else { double _m; \
f = C_flonum_magnitude(x); \
if(modf(f, &_m) != 0.0 || f > C_UWORD_MAX) \
barf(C_BAD_ARGUMENT_TYPE_NO_UINTEGER_ERROR, w, x); \
else n = (C_uword)f; \
}
#endif
#ifdef C_SIXTY_FOUR
#define C_limit_fixnum(n) ((n) & C_MOST_POSITIVE_FIXNUM)
#else
#define C_limit_fixnum(n) (n)
#endif
#define C_pte(name) pt[ i ].id = #name; pt[ i++ ].ptr = (void *)name;
/* Type definitions: */
typedef void (*TOPLEVEL)(C_word c, C_word self, C_word k) C_noret;
typedef void (C_fcall *TRAMPOLINE)(void *proc) C_regparm C_noret;
typedef struct lf_list_struct
{
C_word *lf;
int count;
struct lf_list_struct *next, *prev;
C_PTABLE_ENTRY *ptable;
void *module_handle;
char *module_name;
} LF_LIST;
typedef struct weak_table_entry_struct
{
C_word item,
container;
} WEAK_TABLE_ENTRY;
typedef struct finalizer_node_struct
{
struct finalizer_node_struct
*next,
*previous;
C_word
item,
finalizer;
} FINALIZER_NODE;
typedef struct trace_info_struct
{
C_char *raw;
C_word cooked1, cooked2, thread;
} TRACE_INFO;
/* Variables: */
C_TLS C_word
*C_temporary_stack,
*C_temporary_stack_bottom,
*C_temporary_stack_limit,
*C_stack_limit;
C_TLS long
C_timer_interrupt_counter,
C_initial_timer_interrupt_period;
C_TLS C_byte
*C_fromspace_top,
*C_fromspace_limit;
C_TLS double C_temporary_flonum;
C_TLS jmp_buf C_restart;
C_TLS void *C_restart_address;
C_TLS int C_entry_point_status;
C_TLS int (*C_gc_mutation_hook)(C_word *slot, C_word val);
C_TLS void (*C_gc_trace_hook)(C_word *var, int mode);
C_TLS C_word(*C_get_unbound_variable_value_hook)(C_word sym);
C_TLS void (*C_panic_hook)(C_char *msg) = NULL;
C_TLS void (*C_pre_gc_hook)(int mode) = NULL;
C_TLS void (*C_post_gc_hook)(int mode, long ms) = NULL;
C_TLS void (C_fcall *C_restart_trampoline)(void *proc) C_regparm C_noret;
C_TLS int
C_abort_on_thread_exceptions,
C_enable_repl,
C_interrupts_enabled,
C_disable_overflow_check,
#ifdef C_COLLECT_ALL_SYMBOLS
C_enable_gcweak = 1,
#else
C_enable_gcweak = 0,
#endif
C_heap_size_is_fixed,
C_trace_buffer_size = DEFAULT_TRACE_BUFFER_SIZE,
C_max_pending_finalizers = C_DEFAULT_MAX_PENDING_FINALIZERS,
C_main_argc;
C_TLS C_uword
C_heap_growth,
C_heap_shrinkage;
C_TLS C_uword C_maximal_heap_size;
C_TLS time_t C_startup_time_seconds;
C_TLS char
**C_main_argv,
*C_dlerror;
static C_TLS TRACE_INFO
*trace_buffer,
*trace_buffer_limit,
*trace_buffer_top;
static C_TLS C_byte
*heapspace1,
*heapspace2,
*fromspace_start,
*tospace_start,
*tospace_top,
*tospace_limit,
*new_tospace_start,
*new_tospace_top,
*new_tospace_limit,
*heap_scan_top,
*timer_start_fromspace_top;
static C_TLS size_t
heapspace1_size,
heapspace2_size;
static C_TLS C_char
buffer[ STRING_BUFFER_SIZE ],
*current_module_name,
*save_string;
static C_TLS C_SYMBOL_TABLE
*symbol_table,
*symbol_table_list;
static C_TLS C_word
**collectibles,
**collectibles_top,
**collectibles_limit,
*saved_stack_limit,
**mutation_stack_bottom,
**mutation_stack_limit,
**mutation_stack_top,
*stack_bottom,
*locative_table,
error_location,
interrupt_hook_symbol,
current_thread_symbol,
error_hook_symbol,
invalid_procedure_call_hook_symbol,
unbound_variable_value_hook_symbol,
last_invalid_procedure_symbol,
identity_unbound_value_symbol,
apply_hook_symbol,
last_applied_procedure_symbol,
pending_finalizers_symbol,
callback_continuation_stack_symbol,
*forwarding_table;
static C_TLS int
trace_buffer_full,
forwarding_table_size,
return_to_host,
page_size,
show_trace,
fake_tty_flag,
debug_mode,
gc_bell,
gc_report_flag,
gc_mode,
gc_count_1,
gc_count_2,
timer_start_gc_count_1,
timer_start_gc_count_2,
interrupt_reason,
stack_size_changed,
dlopen_flags,
heap_size_changed,
chicken_is_running,
chicken_ran_once,
callback_continuation_level;
static C_TLS unsigned int
mutation_count,
stack_size,
heap_size,
timer_start_mutation_count;
static C_TLS int chicken_is_initialized;
static C_TLS jmp_buf gc_restart;
static C_TLS long
timer_start_ms,
timer_start_gc_ms,
timer_accumulated_gc_ms,
interrupt_time,
last_interrupt_latency;
static C_TLS LF_LIST
*lf_list,
*reload_lf;
static C_TLS int signal_mapping_table[ NSIG ];
static C_TLS int
locative_table_size,
locative_table_count,
live_finalizer_count,
allocated_finalizer_count,
pending_finalizer_count,
callback_returned_flag;
static C_TLS WEAK_TABLE_ENTRY *weak_item_table;
static C_TLS C_GC_ROOT *gc_root_list = NULL;
static C_TLS FINALIZER_NODE
*finalizer_list,
*finalizer_free_list,
**pending_finalizer_indices;
static C_TLS void *current_module_handle;
static C_TLS int flonum_print_precision = FLONUM_PRINT_PRECISION;
/* Prototypes: */
static void parse_argv(C_char *cmds);
static void initialize_symbol_table(void);
static void global_signal_handler(int signum);
static C_word arg_val(C_char *arg);
static void barf(int code, char *loc, ...) C_noret;
static void panic(C_char *msg) C_noret;
static void usual_panic(C_char *msg) C_noret;
static void horror(C_char *msg) C_noret;
static void C_fcall initial_trampoline(void *proc) C_regparm C_noret;
static C_ccall void termination_continuation(C_word c, C_word self, C_word result) C_noret;
static void C_fcall mark_system_globals(void) C_regparm;
static void C_fcall mark(C_word *x) C_regparm;
static WEAK_TABLE_ENTRY *C_fcall lookup_weak_table_entry(C_word item, C_word container) C_regparm;
static C_ccall void values_continuation(C_word c, C_word closure, C_word dummy, ...) C_noret;
static C_word add_symbol(C_word **ptr, C_word key, C_word string, C_SYMBOL_TABLE *stable);
static int C_fcall hash_string(int len, C_char *str, unsigned int m) C_regparm;
static C_word C_fcall lookup(C_word key, int len, C_char *str, C_SYMBOL_TABLE *stable) C_regparm;
static double compute_symbol_table_load(double *avg_bucket_len, int *total);
static C_word C_fcall convert_string_to_number(C_char *str, int radix, C_word *fix, double *flo) C_regparm;
static long C_fcall milliseconds(void);
static long C_fcall cpu_milliseconds(void);
static void C_fcall remark_system_globals(void) C_regparm;
static void C_fcall remark(C_word *x) C_regparm;
static C_word C_fcall intern0(C_char *name) C_regparm;
static void C_fcall update_locative_table(int mode) C_regparm;
static C_word get_unbound_variable_value(C_word sym);
static LF_LIST *find_module_handle(C_char *name);
static C_ccall void call_cc_wrapper(C_word c, C_word closure, C_word k, C_word result) C_noret;
static C_ccall void call_cc_values_wrapper(C_word c, C_word closure, C_word k, ...) C_noret;
static void cons_flonum_trampoline(void *dummy) C_noret;
static void gc_2(void *dummy) C_noret;
static void allocate_vector_2(void *dummy) C_noret;
static void get_argv_2(void *dummy) C_noret;
static void make_structure_2(void *dummy) C_noret;
static void generic_trampoline(void *dummy) C_noret;
static void file_info_2(void *dummy) C_noret;
static void get_environment_variable_2(void *dummy) C_noret;
static void handle_interrupt(void *trampoline, void *proc) C_noret;
static void callback_trampoline(void *dummy) C_noret;
static C_ccall void callback_return_continuation(C_word c, C_word self, C_word r) C_noret;
static void become_2(void *dummy) C_noret;
static void copy_closure_2(void *dummy) C_noret;
static C_PTABLE_ENTRY *create_initial_ptable();
#if !defined(NO_DLOAD2) && (defined(HAVE_DLFCN_H) || defined(HAVE_DL_H) || (defined(HAVE_LOADLIBRARY) && defined(HAVE_GETPROCADDRESS)))
static void dload_2(void *dummy) C_noret;
#endif
/* Startup code: */
int CHICKEN_main(int argc, char *argv[], void *toplevel)
{
C_word h, s, n;
#if defined(C_WINDOWS_GUI)
parse_argv(GetCommandLine());
argc = C_main_argc;
argv = C_main_argv;
#endif
CHICKEN_parse_command_line(argc, argv, &h, &s, &n);
if(!CHICKEN_initialize(h, s, n, toplevel))
panic(C_text("cannot initialize - out of memory"));
CHICKEN_run(NULL);
return 0;
}
/* Custom argv parser for Windoze: */
#ifdef C_WINDOWS_GUI
void parse_argv(C_char *cmds)
{
C_char *ptr = cmds,
*bptr0, *bptr, *aptr;
int n = 0;
C_main_argv = (C_char **)malloc(MAXIMAL_NUMBER_OF_COMMAND_LINE_ARGUMENTS * sizeof(C_char *));
if(C_main_argv == NULL)
panic(C_text("cannot allocate argument-list buffer"));
C_main_argc = 0;
for(;;) {
while(isspace(*ptr)) ++ptr;
if(*ptr == '\0') break;
for(bptr0 = bptr = buffer; !isspace(*ptr) && *ptr != '\0'; *(bptr++) = *(ptr++))
++n;
*bptr = '\0';
aptr = (C_char *)malloc(sizeof(C_char) * (n + 1));
if(aptr == NULL)
panic(C_text("cannot allocate argument buffer"));
C_strcpy(aptr, bptr0);
C_main_argv[ C_main_argc++ ] = aptr;
}
}
#endif
/* Initialize runtime system: */
int CHICKEN_initialize(int heap, int stack, int symbols, void *toplevel)
{
int i;
/*FIXME Should have C_tzset in chicken.h? */
#ifdef C_NONUNIX
C_startup_time_seconds = (time_t)0;
# if defined(_MSC_VER) || defined(__MINGW32__)
/* Make sure _tzname, _timezone, and _daylight are set */
_tzset();
# endif
#else
struct timeval tv;
C_gettimeofday(&tv, NULL);
C_startup_time_seconds = tv.tv_sec;
/* Make sure tzname, timezone, and daylight are set */
tzset();
#endif
if(chicken_is_initialized) return 1;
else chicken_is_initialized = 1;
if(debug_mode) C_printf(C_text("[debug] application startup...\n"));
C_panic_hook = usual_panic;
symbol_table_list = NULL;
if((symbol_table = C_new_symbol_table(".", symbols ? symbols : DEFAULT_SYMBOL_TABLE_SIZE)) == NULL)
return 0;
page_size = 0;
stack_size = stack ? stack : DEFAULT_STACK_SIZE;
C_set_or_change_heap_size(heap ? heap : DEFAULT_HEAP_SIZE, 0);
/* Allocate temporary stack: */
if((C_temporary_stack_limit = (C_word *)C_malloc(TEMPORARY_STACK_SIZE * sizeof(C_word))) == NULL)
return 0;
C_temporary_stack_bottom = C_temporary_stack_limit + TEMPORARY_STACK_SIZE;
C_temporary_stack = C_temporary_stack_bottom;
/* Allocate mutation stack: */
mutation_stack_bottom = (C_word **)C_malloc(DEFAULT_MUTATION_STACK_SIZE * sizeof(C_word *));
if(mutation_stack_bottom == NULL) return 0;
mutation_stack_top = mutation_stack_bottom;
mutation_stack_limit = mutation_stack_bottom + DEFAULT_MUTATION_STACK_SIZE;
C_gc_mutation_hook = NULL;
C_gc_trace_hook = NULL;
C_get_unbound_variable_value_hook = get_unbound_variable_value;
/* Allocate weak item table: */
if(C_enable_gcweak) {
if((weak_item_table = (WEAK_TABLE_ENTRY *)C_calloc(WEAK_TABLE_SIZE, sizeof(WEAK_TABLE_ENTRY))) == NULL)
return 0;
}
/* Initialize finalizer lists: */
finalizer_list = NULL;
finalizer_free_list = NULL;
pending_finalizer_indices =
(FINALIZER_NODE **)C_malloc(C_max_pending_finalizers * sizeof(FINALIZER_NODE *));
if(pending_finalizer_indices == NULL) return 0;
/* Initialize forwarding table: */
forwarding_table =
(C_word *)C_malloc((DEFAULT_FORWARDING_TABLE_SIZE + 1) * 2 * sizeof(C_word));
if(forwarding_table == NULL) return 0;
*forwarding_table = 0;
forwarding_table_size = DEFAULT_FORWARDING_TABLE_SIZE;
/* Initialize locative table: */
locative_table = (C_word *)C_malloc(DEFAULT_LOCATIVE_TABLE_SIZE * sizeof(C_word));
if(locative_table == NULL) return 0;
locative_table_size = DEFAULT_LOCATIVE_TABLE_SIZE;
locative_table_count = 0;
/* Setup collectibles: */
collectibles = (C_word **)C_malloc(sizeof(C_word *) * DEFAULT_COLLECTIBLES_SIZE);
if(collectibles == NULL) return 0;
collectibles_top = collectibles;
collectibles_limit = collectibles + DEFAULT_COLLECTIBLES_SIZE;
gc_root_list = NULL;
/* Initialize global variables: */
if(C_heap_growth == 0) C_heap_growth = DEFAULT_HEAP_GROWTH;
if(C_heap_shrinkage == 0) C_heap_shrinkage = DEFAULT_HEAP_SHRINKAGE;
if(C_maximal_heap_size == 0) C_maximal_heap_size = DEFAULT_MAXIMAL_HEAP_SIZE;
#if !defined(NO_DLOAD2) && defined(HAVE_DLFCN_H)
dlopen_flags = RTLD_LAZY | RTLD_GLOBAL;
#else
dlopen_flags = 0;
#endif
gc_report_flag = 0;
mutation_count = gc_count_1 = gc_count_2 = 0;
lf_list = NULL;
C_register_lf2(NULL, 0, create_initial_ptable());
C_restart_address = toplevel;
C_restart_trampoline = initial_trampoline;
trace_buffer = NULL;
C_clear_trace_buffer();
chicken_is_running = chicken_ran_once = 0;
interrupt_reason = 0;
last_interrupt_latency = 0;
C_interrupts_enabled = 1;
C_initial_timer_interrupt_period = INITIAL_TIMER_INTERRUPT_PERIOD;
C_timer_interrupt_counter = INITIAL_TIMER_INTERRUPT_PERIOD;
memset(signal_mapping_table, 0, sizeof(int) * NSIG);
initialize_symbol_table();
C_dlerror = "cannot load compiled code dynamically - this is a statically linked executable";
error_location = C_SCHEME_FALSE;
C_pre_gc_hook = NULL;
C_post_gc_hook = NULL;
live_finalizer_count = 0;
allocated_finalizer_count = 0;
current_module_name = NULL;
current_module_handle = NULL;
reload_lf = NULL;
callback_continuation_level = 0;
timer_start_gc_ms = 0;
#if defined(C_NONUNIX)
C_randomize(time(NULL));
#elif defined(C_MACOSX) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
srandomdev();
#else
srandom(time(NULL));
#endif
return 1;
}
static C_PTABLE_ENTRY *create_initial_ptable()
{
C_PTABLE_ENTRY *pt = (C_PTABLE_ENTRY *)C_malloc(sizeof(C_PTABLE_ENTRY) * 66);
int i = 0;
if(pt == NULL)
panic(C_text("out of memory - cannot create initial ptable"));
C_pte(termination_continuation);
C_pte(callback_return_continuation);
C_pte(values_continuation);
C_pte(call_cc_values_wrapper);
C_pte(call_cc_wrapper);
C_pte(C_gc);
C_pte(C_allocate_vector);
C_pte(C_get_argv);
C_pte(C_make_structure);
C_pte(C_ensure_heap_reserve);
C_pte(C_return_to_host);
C_pte(C_file_info);
C_pte(C_get_symbol_table_info);
C_pte(C_get_memory_info);
C_pte(C_cpu_time);
C_pte(C_decode_seconds);
C_pte(C_get_environment_variable);
C_pte(C_stop_timer);
C_pte(C_dload);
C_pte(C_set_dlopen_flags);
C_pte(C_become);
C_pte(C_apply_values);
C_pte(C_times);
C_pte(C_minus);
C_pte(C_plus);
C_pte(C_divide);
C_pte(C_nequalp);
C_pte(C_greaterp);
C_pte(C_lessp);
C_pte(C_greater_or_equal_p);
C_pte(C_less_or_equal_p);
C_pte(C_flonum_floor);
C_pte(C_flonum_ceiling);
C_pte(C_flonum_truncate);
C_pte(C_flonum_round);
C_pte(C_quotient);
C_pte(C_cons_flonum);
C_pte(C_flonum_fraction);
C_pte(C_expt);
C_pte(C_exact_to_inexact);
C_pte(C_string_to_number);
C_pte(C_number_to_string);
C_pte(C_make_symbol);
C_pte(C_string_to_symbol);
C_pte(C_apply);
C_pte(C_call_cc);
C_pte(C_values);
C_pte(C_call_with_values);
C_pte(C_continuation_graft);
C_pte(C_open_file_port);
C_pte(C_software_type);
C_pte(C_machine_type);
C_pte(C_machine_byte_order);
C_pte(C_software_version);
C_pte(C_build_platform);
C_pte(C_c_runtime);
C_pte(C_make_pointer);
C_pte(C_make_tagged_pointer);
C_pte(C_peek_signed_integer);
C_pte(C_peek_unsigned_integer);
C_pte(C_context_switch);
C_pte(C_register_finalizer);
C_pte(C_locative_ref);
C_pte(C_call_with_cthulhu);
C_pte(C_dunload);
pt[ i ].id = NULL;
return pt;
}
void *CHICKEN_new_gc_root_2(int finalizable)
{
C_GC_ROOT *r = (C_GC_ROOT *)C_malloc(sizeof(C_GC_ROOT));
if(r == NULL)
panic(C_text("out of memory - cannot allocate GC root"));
r->value = C_SCHEME_UNDEFINED;
r->next = gc_root_list;
r->prev = NULL;
r->finalizable = finalizable;
if(gc_root_list != NULL) gc_root_list->prev = r;
gc_root_list = r;
return (void *)r;
}
void *CHICKEN_new_gc_root()
{
return CHICKEN_new_gc_root_2(0);
}
void *CHICKEN_new_finalizable_gc_root()
{
return CHICKEN_new_gc_root_2(1);
}
void CHICKEN_delete_gc_root(void *root)
{
C_GC_ROOT *r = (C_GC_ROOT *)root;
if(r->prev == NULL) gc_root_list = r->next;
else r->prev->next = r->next;
if(r->next != NULL) r->next->prev = r->prev;
C_free(root);
}
void *CHICKEN_global_lookup(char *name)
{
int
len = C_strlen(name),
key = hash_string(len, name, symbol_table->size);
C_word s;
void *root = CHICKEN_new_gc_root();
if(C_truep(s = lookup(key, len, name, symbol_table))) {
if(C_u_i_car(s) != C_SCHEME_UNBOUND) {
CHICKEN_gc_root_set(root, s);
return root;
}
}
return NULL;
}
int CHICKEN_is_running()
{
return chicken_is_running;
}
void CHICKEN_interrupt()
{
C_timer_interrupt_counter = 0;
}
C_regparm C_SYMBOL_TABLE *C_new_symbol_table(char *name, unsigned int size)
{
C_SYMBOL_TABLE *stp;
int i;
if((stp = C_find_symbol_table(name)) != NULL) return stp;
if((stp = (C_SYMBOL_TABLE *)C_malloc(sizeof(C_SYMBOL_TABLE))) == NULL)
return NULL;
stp->name = name;
stp->size = size;
stp->next = symbol_table_list;
if((stp->table = (C_word *)C_malloc(size * sizeof(C_word))) == NULL)
return NULL;
for(i = 0; i < stp->size; stp->table[ i++ ] = C_SCHEME_END_OF_LIST);
symbol_table_list = stp;
return stp;
}
C_regparm void C_delete_symbol_table(C_SYMBOL_TABLE *st)
{
C_SYMBOL_TABLE *stp, *prev = NULL;
for(stp = symbol_table_list; stp != NULL; stp = stp->next)
if(stp == st) {
if(prev != NULL) prev->next = stp->next;
else symbol_table_list = stp->next;
return;
}
}
C_regparm void C_set_symbol_table(C_SYMBOL_TABLE *st)
{
symbol_table = st;
}
C_regparm C_SYMBOL_TABLE *C_find_symbol_table(char *name)
{
C_SYMBOL_TABLE *stp;
for(stp = symbol_table_list; stp != NULL; stp = stp->next)
if(!C_strcmp(name, stp->name)) return stp;
return NULL;
}
C_regparm C_word C_find_symbol(C_word str, C_SYMBOL_TABLE *stable)
{
char *sptr = C_c_string(str);
int
len = C_header_size(str),
key = hash_string(len, sptr, stable->size);
C_word s;
if(C_truep(s = lookup(key, len, sptr, stable))) return s;
else return C_SCHEME_FALSE;
}
C_regparm C_word C_enumerate_symbols(C_SYMBOL_TABLE *stable, C_word pos)
{
int i;
C_word
sym,
bucket = C_u_i_car(pos);
if(!C_truep(bucket)) return C_SCHEME_FALSE; /* end already reached */
else i = C_unfix(bucket);
bucket = C_u_i_cdr(pos);
while(bucket == C_SCHEME_END_OF_LIST) {
if(++i >= stable->size) {
C_set_block_item(pos, 0, C_SCHEME_FALSE); /* no more buckets */
return C_SCHEME_FALSE;
}
else bucket = stable->table[ i ];
}
sym = C_u_i_car(bucket);
C_set_block_item(pos, 0, C_fix(i));
C_mutate(&C_u_i_cdr(pos), C_u_i_cdr(bucket));
return sym;
}
/* Setup symbol-table with internally used symbols; */
void initialize_symbol_table(void)
{
int i;
for(i = 0; i < symbol_table->size; symbol_table->table[ i++ ] = C_SCHEME_END_OF_LIST);
/* Obtain reference to hooks for later: */
interrupt_hook_symbol = C_intern2(C_heaptop, C_text("\003sysinterrupt-hook"));
error_hook_symbol = C_intern2(C_heaptop, C_text("\003syserror-hook"));
callback_continuation_stack_symbol = C_intern3(C_heaptop, C_text("\003syscallback-continuation-stack"), C_SCHEME_END_OF_LIST);
pending_finalizers_symbol = C_intern2(C_heaptop, C_text("\003syspending-finalizers"));
invalid_procedure_call_hook_symbol = C_intern3(C_heaptop, C_text("\003sysinvalid-procedure-call-hook"), C_SCHEME_FALSE);
unbound_variable_value_hook_symbol = C_intern3(C_heaptop, C_text("\003sysunbound-variable-value-hook"), C_SCHEME_FALSE);
last_invalid_procedure_symbol = C_intern3(C_heaptop, C_text("\003syslast-invalid-procedure"), C_SCHEME_FALSE);
identity_unbound_value_symbol = C_intern3(C_heaptop, C_text("\003sysidentity-unbound-value"), C_SCHEME_FALSE);
current_thread_symbol = C_intern3(C_heaptop, C_text("\003syscurrent-thread"), C_SCHEME_FALSE);
apply_hook_symbol = C_intern3(C_heaptop, C_text("\003sysapply-hook"), C_SCHEME_FALSE);
last_applied_procedure_symbol = C_intern2(C_heaptop, C_text("\003syslast-applied-procedure"));
}
/* This is called from POSIX signals: */