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vm_core.h
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vm_core.h
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#ifndef RUBY_VM_CORE_H
#define RUBY_VM_CORE_H
/**********************************************************************
vm_core.h -
$Author$
created at: 04/01/01 19:41:38 JST
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
/*
* Enable check mode.
* 1: enable local assertions.
*/
#ifndef VM_CHECK_MODE
// respect RUBY_DUBUG: if given n is 0, then use RUBY_DEBUG
#define N_OR_RUBY_DEBUG(n) (((n) > 0) ? (n) : RUBY_DEBUG)
#define VM_CHECK_MODE N_OR_RUBY_DEBUG(0)
#endif
/**
* VM Debug Level
*
* debug level:
* 0: no debug output
* 1: show instruction name
* 2: show stack frame when control stack frame is changed
* 3: show stack status
* 4: show register
* 5:
* 10: gc check
*/
#ifndef VMDEBUG
#define VMDEBUG 0
#endif
#if 0
#undef VMDEBUG
#define VMDEBUG 3
#endif
#include "ruby/internal/config.h"
#include <stddef.h>
#include <signal.h>
#include <stdarg.h>
#include "ruby_assert.h"
#define RVALUE_SIZE (sizeof(struct RBasic) + sizeof(VALUE[RBIMPL_RVALUE_EMBED_LEN_MAX]))
#if VM_CHECK_MODE > 0
#define VM_ASSERT(/*expr, */...) RUBY_ASSERT_WHEN(VM_CHECK_MODE > 0, __VA_ARGS__)
#define VM_UNREACHABLE(func) rb_bug(#func ": unreachable")
#define RUBY_ASSERT_CRITICAL_SECTION
#define RUBY_DEBUG_THREAD_SCHEDULE() rb_thread_schedule()
#else
#define VM_ASSERT(/*expr, */...) ((void)0)
#define VM_UNREACHABLE(func) UNREACHABLE
#define RUBY_DEBUG_THREAD_SCHEDULE()
#endif
#define RUBY_ASSERT_MUTEX_OWNED(mutex) VM_ASSERT(rb_mutex_owned_p(mutex))
#if defined(RUBY_ASSERT_CRITICAL_SECTION)
// TODO add documentation
extern int ruby_assert_critical_section_entered;
#define RUBY_ASSERT_CRITICAL_SECTION_ENTER() do{ruby_assert_critical_section_entered += 1;}while(false)
#define RUBY_ASSERT_CRITICAL_SECTION_LEAVE() do{VM_ASSERT(ruby_assert_critical_section_entered > 0);ruby_assert_critical_section_entered -= 1;}while(false)
#else
#define RUBY_ASSERT_CRITICAL_SECTION_ENTER()
#define RUBY_ASSERT_CRITICAL_SECTION_LEAVE()
#endif
#if defined(__wasm__) && !defined(__EMSCRIPTEN__)
# include "wasm/setjmp.h"
#else
# include <setjmp.h>
#endif
#if defined(__linux__) || defined(__FreeBSD__)
# define RB_THREAD_T_HAS_NATIVE_ID
#endif
#include "ruby/internal/stdbool.h"
#include "ccan/list/list.h"
#include "id.h"
#include "internal.h"
#include "internal/array.h"
#include "internal/basic_operators.h"
#include "internal/sanitizers.h"
#include "internal/serial.h"
#include "internal/vm.h"
#include "method.h"
#include "node.h"
#include "ruby/ruby.h"
#include "ruby/st.h"
#include "ruby_atomic.h"
#include "vm_opts.h"
#include "ruby/thread_native.h"
/*
* implementation selector of get_insn_info algorithm
* 0: linear search
* 1: binary search
* 2: succinct bitvector
*/
#ifndef VM_INSN_INFO_TABLE_IMPL
# define VM_INSN_INFO_TABLE_IMPL 2
#endif
#if defined(NSIG_MAX) /* POSIX issue 8 */
# undef NSIG
# define NSIG NSIG_MAX
#elif defined(_SIG_MAXSIG) /* FreeBSD */
# undef NSIG
# define NSIG _SIG_MAXSIG
#elif defined(_SIGMAX) /* QNX */
# define NSIG (_SIGMAX + 1)
#elif defined(NSIG) /* 99% of everything else */
# /* take it */
#else /* Last resort */
# define NSIG (sizeof(sigset_t) * CHAR_BIT + 1)
#endif
#define RUBY_NSIG NSIG
#if defined(SIGCLD)
# define RUBY_SIGCHLD (SIGCLD)
#elif defined(SIGCHLD)
# define RUBY_SIGCHLD (SIGCHLD)
#endif
#if defined(SIGSEGV) && defined(HAVE_SIGALTSTACK) && defined(SA_SIGINFO) && !defined(__NetBSD__)
# define USE_SIGALTSTACK
void *rb_allocate_sigaltstack(void);
void *rb_register_sigaltstack(void *);
# define RB_ALTSTACK_INIT(var, altstack) var = rb_register_sigaltstack(altstack)
# define RB_ALTSTACK_FREE(var) free(var)
# define RB_ALTSTACK(var) var
#else /* noop */
# define RB_ALTSTACK_INIT(var, altstack)
# define RB_ALTSTACK_FREE(var)
# define RB_ALTSTACK(var) (0)
#endif
#include THREAD_IMPL_H
#define RUBY_VM_THREAD_MODEL 2
/*****************/
/* configuration */
/*****************/
/* gcc ver. check */
#if defined(__GNUC__) && __GNUC__ >= 2
#if OPT_TOKEN_THREADED_CODE
#if OPT_DIRECT_THREADED_CODE
#undef OPT_DIRECT_THREADED_CODE
#endif
#endif
#else /* defined(__GNUC__) && __GNUC__ >= 2 */
/* disable threaded code options */
#if OPT_DIRECT_THREADED_CODE
#undef OPT_DIRECT_THREADED_CODE
#endif
#if OPT_TOKEN_THREADED_CODE
#undef OPT_TOKEN_THREADED_CODE
#endif
#endif
/* call threaded code */
#if OPT_CALL_THREADED_CODE
#if OPT_DIRECT_THREADED_CODE
#undef OPT_DIRECT_THREADED_CODE
#endif /* OPT_DIRECT_THREADED_CODE */
#endif /* OPT_CALL_THREADED_CODE */
void rb_vm_encoded_insn_data_table_init(void);
typedef unsigned long rb_num_t;
typedef signed long rb_snum_t;
enum ruby_tag_type {
RUBY_TAG_NONE = 0x0,
RUBY_TAG_RETURN = 0x1,
RUBY_TAG_BREAK = 0x2,
RUBY_TAG_NEXT = 0x3,
RUBY_TAG_RETRY = 0x4,
RUBY_TAG_REDO = 0x5,
RUBY_TAG_RAISE = 0x6,
RUBY_TAG_THROW = 0x7,
RUBY_TAG_FATAL = 0x8,
RUBY_TAG_MASK = 0xf
};
#define TAG_NONE RUBY_TAG_NONE
#define TAG_RETURN RUBY_TAG_RETURN
#define TAG_BREAK RUBY_TAG_BREAK
#define TAG_NEXT RUBY_TAG_NEXT
#define TAG_RETRY RUBY_TAG_RETRY
#define TAG_REDO RUBY_TAG_REDO
#define TAG_RAISE RUBY_TAG_RAISE
#define TAG_THROW RUBY_TAG_THROW
#define TAG_FATAL RUBY_TAG_FATAL
#define TAG_MASK RUBY_TAG_MASK
enum ruby_vm_throw_flags {
VM_THROW_NO_ESCAPE_FLAG = 0x8000,
VM_THROW_STATE_MASK = 0xff
};
/* forward declarations */
struct rb_thread_struct;
struct rb_control_frame_struct;
/* iseq data type */
typedef struct rb_compile_option_struct rb_compile_option_t;
union ic_serial_entry {
rb_serial_t raw;
VALUE data[2];
};
// imemo_constcache
struct iseq_inline_constant_cache_entry {
VALUE flags;
VALUE value; // v0
VALUE _unused1; // v1
VALUE _unused2; // v2
const rb_cref_t *ic_cref; // v3
};
STATIC_ASSERT(sizeof_iseq_inline_constant_cache_entry,
(offsetof(struct iseq_inline_constant_cache_entry, ic_cref) +
sizeof(const rb_cref_t *)) <= RVALUE_SIZE);
struct iseq_inline_constant_cache {
struct iseq_inline_constant_cache_entry *entry;
/**
* A null-terminated list of ids, used to represent a constant's path
* idNULL is used to represent the :: prefix, and 0 is used to donate the end
* of the list.
*
* For example
* FOO {rb_intern("FOO"), 0}
* FOO::BAR {rb_intern("FOO"), rb_intern("BAR"), 0}
* ::FOO {idNULL, rb_intern("FOO"), 0}
* ::FOO::BAR {idNULL, rb_intern("FOO"), rb_intern("BAR"), 0}
*/
const ID *segments;
};
struct iseq_inline_iv_cache_entry {
uintptr_t value; // attr_index in lower bits, dest_shape_id in upper bits
ID iv_set_name;
};
struct iseq_inline_cvar_cache_entry {
struct rb_cvar_class_tbl_entry *entry;
};
union iseq_inline_storage_entry {
struct {
struct rb_thread_struct *running_thread;
VALUE value;
} once;
struct iseq_inline_constant_cache ic_cache;
struct iseq_inline_iv_cache_entry iv_cache;
};
struct rb_calling_info {
const struct rb_call_data *cd;
const struct rb_callcache *cc;
VALUE block_handler;
VALUE recv;
int argc;
bool kw_splat;
VALUE heap_argv;
};
#ifndef VM_ARGC_STACK_MAX
#define VM_ARGC_STACK_MAX 128
#endif
# define CALLING_ARGC(calling) ((calling)->heap_argv ? RARRAY_LENINT((calling)->heap_argv) : (calling)->argc)
struct rb_execution_context_struct;
#if 1
#define CoreDataFromValue(obj, type) (type*)DATA_PTR(obj)
#else
#define CoreDataFromValue(obj, type) (type*)rb_data_object_get(obj)
#endif
#define GetCoreDataFromValue(obj, type, ptr) ((ptr) = CoreDataFromValue((obj), type))
typedef struct rb_iseq_location_struct {
VALUE pathobj; /* String (path) or Array [path, realpath]. Frozen. */
VALUE base_label; /* String */
VALUE label; /* String */
int first_lineno;
int node_id;
rb_code_location_t code_location;
} rb_iseq_location_t;
#define PATHOBJ_PATH 0
#define PATHOBJ_REALPATH 1
static inline VALUE
pathobj_path(VALUE pathobj)
{
if (RB_TYPE_P(pathobj, T_STRING)) {
return pathobj;
}
else {
VM_ASSERT(RB_TYPE_P(pathobj, T_ARRAY));
return RARRAY_AREF(pathobj, PATHOBJ_PATH);
}
}
static inline VALUE
pathobj_realpath(VALUE pathobj)
{
if (RB_TYPE_P(pathobj, T_STRING)) {
return pathobj;
}
else {
VM_ASSERT(RB_TYPE_P(pathobj, T_ARRAY));
return RARRAY_AREF(pathobj, PATHOBJ_REALPATH);
}
}
/* Forward declarations */
struct rb_rjit_unit;
typedef uintptr_t iseq_bits_t;
#define ISEQ_IS_SIZE(body) (body->ic_size + body->ivc_size + body->ise_size + body->icvarc_size)
/* [ TS_IVC | TS_ICVARC | TS_ISE | TS_IC ] */
#define ISEQ_IS_IC_ENTRY(body, idx) (body->is_entries[(idx) + body->ise_size + body->icvarc_size + body->ivc_size].ic_cache);
/* instruction sequence type */
enum rb_iseq_type {
ISEQ_TYPE_TOP,
ISEQ_TYPE_METHOD,
ISEQ_TYPE_BLOCK,
ISEQ_TYPE_CLASS,
ISEQ_TYPE_RESCUE,
ISEQ_TYPE_ENSURE,
ISEQ_TYPE_EVAL,
ISEQ_TYPE_MAIN,
ISEQ_TYPE_PLAIN
};
// Attributes specified by Primitive.attr!
enum rb_builtin_attr {
// The iseq does not call methods.
BUILTIN_ATTR_LEAF = 0x01,
// This iseq only contains single `opt_invokebuiltin_delegate_leave` instruction with 0 arguments.
BUILTIN_ATTR_SINGLE_NOARG_LEAF = 0x02,
// This attribute signals JIT to duplicate the iseq for each block iseq so that its `yield` will be monomorphic.
BUILTIN_ATTR_INLINE_BLOCK = 0x04,
};
typedef VALUE (*rb_jit_func_t)(struct rb_execution_context_struct *, struct rb_control_frame_struct *);
struct rb_iseq_constant_body {
enum rb_iseq_type type;
unsigned int iseq_size;
VALUE *iseq_encoded; /* encoded iseq (insn addr and operands) */
/**
* parameter information
*
* def m(a1, a2, ..., aM, # mandatory
* b1=(...), b2=(...), ..., bN=(...), # optional
* *c, # rest
* d1, d2, ..., dO, # post
* e1:(...), e2:(...), ..., eK:(...), # keyword
* **f, # keyword_rest
* &g) # block
* =>
*
* lead_num = M
* opt_num = N
* rest_start = M+N
* post_start = M+N+(*1)
* post_num = O
* keyword_num = K
* block_start = M+N+(*1)+O+K
* keyword_bits = M+N+(*1)+O+K+(&1)
* size = M+N+O+(*1)+K+(&1)+(**1) // parameter size.
*/
struct {
struct {
unsigned int has_lead : 1;
unsigned int has_opt : 1;
unsigned int has_rest : 1;
unsigned int has_post : 1;
unsigned int has_kw : 1;
unsigned int has_kwrest : 1;
unsigned int has_block : 1;
unsigned int ambiguous_param0 : 1; /* {|a|} */
unsigned int accepts_no_kwarg : 1;
unsigned int ruby2_keywords: 1;
unsigned int anon_rest: 1;
unsigned int anon_kwrest: 1;
} flags;
unsigned int size;
int lead_num;
int opt_num;
int rest_start;
int post_start;
int post_num;
int block_start;
const VALUE *opt_table; /* (opt_num + 1) entries. */
/* opt_num and opt_table:
*
* def foo o1=e1, o2=e2, ..., oN=eN
* #=>
* # prologue code
* A1: e1
* A2: e2
* ...
* AN: eN
* AL: body
* opt_num = N
* opt_table = [A1, A2, ..., AN, AL]
*/
const struct rb_iseq_param_keyword {
int num;
int required_num;
int bits_start;
int rest_start;
const ID *table;
VALUE *default_values;
} *keyword;
} param;
rb_iseq_location_t location;
/* insn info, must be freed */
struct iseq_insn_info {
const struct iseq_insn_info_entry *body;
unsigned int *positions;
unsigned int size;
#if VM_INSN_INFO_TABLE_IMPL == 2
struct succ_index_table *succ_index_table;
#endif
} insns_info;
const ID *local_table; /* must free */
/* catch table */
struct iseq_catch_table *catch_table;
/* for child iseq */
const struct rb_iseq_struct *parent_iseq;
struct rb_iseq_struct *local_iseq; /* local_iseq->flip_cnt can be modified */
union iseq_inline_storage_entry *is_entries; /* [ TS_IVC | TS_ICVARC | TS_ISE | TS_IC ] */
struct rb_call_data *call_data; //struct rb_call_data calls[ci_size];
struct {
rb_snum_t flip_count;
VALUE script_lines;
VALUE coverage;
VALUE pc2branchindex;
VALUE *original_iseq;
} variable;
unsigned int local_table_size;
unsigned int ic_size; // Number of IC caches
unsigned int ise_size; // Number of ISE caches
unsigned int ivc_size; // Number of IVC caches
unsigned int icvarc_size; // Number of ICVARC caches
unsigned int ci_size;
unsigned int stack_max; /* for stack overflow check */
unsigned int builtin_attrs; // Union of rb_builtin_attr
bool prism; // ISEQ was generated from prism compiler
union {
iseq_bits_t * list; /* Find references for GC */
iseq_bits_t single;
} mark_bits;
struct rb_id_table *outer_variables;
const rb_iseq_t *mandatory_only_iseq;
#if USE_RJIT || USE_YJIT
// Function pointer for JIT code on jit_exec()
rb_jit_func_t jit_entry;
// Number of calls on jit_exec()
long unsigned jit_entry_calls;
#endif
#if USE_YJIT
// Function pointer for JIT code on jit_exec_exception()
rb_jit_func_t jit_exception;
// Number of calls on jit_exec_exception()
long unsigned jit_exception_calls;
#endif
#if USE_RJIT
// RJIT stores some data on each iseq.
VALUE rjit_blocks;
#endif
#if USE_YJIT
// YJIT stores some data on each iseq.
void *yjit_payload;
// Used to estimate how frequently this ISEQ gets called
uint64_t yjit_calls_at_interv;
#endif
};
/* T_IMEMO/iseq */
/* typedef rb_iseq_t is in method.h */
struct rb_iseq_struct {
VALUE flags; /* 1 */
VALUE wrapper; /* 2 */
struct rb_iseq_constant_body *body; /* 3 */
union { /* 4, 5 words */
struct iseq_compile_data *compile_data; /* used at compile time */
struct {
VALUE obj;
int index;
} loader;
struct {
struct rb_hook_list_struct *local_hooks;
rb_event_flag_t global_trace_events;
} exec;
} aux;
};
#define ISEQ_BODY(iseq) ((iseq)->body)
#if !defined(USE_LAZY_LOAD) || !(USE_LAZY_LOAD+0)
#define USE_LAZY_LOAD 0
#endif
#if !USE_LAZY_LOAD
static inline const rb_iseq_t *rb_iseq_complete(const rb_iseq_t *iseq) {return 0;}
#endif
const rb_iseq_t *rb_iseq_complete(const rb_iseq_t *iseq);
static inline const rb_iseq_t *
rb_iseq_check(const rb_iseq_t *iseq)
{
if (USE_LAZY_LOAD && ISEQ_BODY(iseq) == NULL) {
rb_iseq_complete((rb_iseq_t *)iseq);
}
return iseq;
}
static inline const rb_iseq_t *
def_iseq_ptr(rb_method_definition_t *def)
{
//TODO: re-visit. to check the bug, enable this assertion.
#if VM_CHECK_MODE > 0
if (def->type != VM_METHOD_TYPE_ISEQ) rb_bug("def_iseq_ptr: not iseq (%d)", def->type);
#endif
return rb_iseq_check(def->body.iseq.iseqptr);
}
enum ruby_special_exceptions {
ruby_error_reenter,
ruby_error_nomemory,
ruby_error_sysstack,
ruby_error_stackfatal,
ruby_error_stream_closed,
ruby_special_error_count
};
#define GetVMPtr(obj, ptr) \
GetCoreDataFromValue((obj), rb_vm_t, (ptr))
struct rb_vm_struct;
typedef void rb_vm_at_exit_func(struct rb_vm_struct*);
typedef struct rb_at_exit_list {
rb_vm_at_exit_func *func;
struct rb_at_exit_list *next;
} rb_at_exit_list;
struct rb_objspace;
struct rb_objspace *rb_objspace_alloc(void);
void rb_objspace_free(struct rb_objspace *);
void rb_objspace_call_finalizer(struct rb_objspace *);
typedef struct rb_hook_list_struct {
struct rb_event_hook_struct *hooks;
rb_event_flag_t events;
unsigned int running;
bool need_clean;
bool is_local;
} rb_hook_list_t;
// see builtin.h for definition
typedef const struct rb_builtin_function *RB_BUILTIN;
struct global_object_list {
VALUE *varptr;
struct global_object_list *next;
};
typedef struct rb_vm_struct {
VALUE self;
struct {
struct ccan_list_head set;
unsigned int cnt;
unsigned int blocking_cnt;
struct rb_ractor_struct *main_ractor;
struct rb_thread_struct *main_thread; // == vm->ractor.main_ractor->threads.main
struct {
// monitor
rb_nativethread_lock_t lock;
struct rb_ractor_struct *lock_owner;
unsigned int lock_rec;
// join at exit
rb_nativethread_cond_t terminate_cond;
bool terminate_waiting;
#ifndef RUBY_THREAD_PTHREAD_H
bool barrier_waiting;
unsigned int barrier_cnt;
rb_nativethread_cond_t barrier_cond;
#endif
} sync;
// ractor scheduling
struct {
rb_nativethread_lock_t lock;
struct rb_ractor_struct *lock_owner;
bool locked;
rb_nativethread_cond_t cond; // GRQ
unsigned int snt_cnt; // count of shared NTs
unsigned int dnt_cnt; // count of dedicated NTs
unsigned int running_cnt;
unsigned int max_cpu;
struct ccan_list_head grq; // // Global Ready Queue
unsigned int grq_cnt;
// running threads
struct ccan_list_head running_threads;
// threads which switch context by timeslice
struct ccan_list_head timeslice_threads;
struct ccan_list_head zombie_threads;
// true if timeslice timer is not enable
bool timeslice_wait_inf;
// barrier
rb_nativethread_cond_t barrier_complete_cond;
rb_nativethread_cond_t barrier_release_cond;
bool barrier_waiting;
unsigned int barrier_waiting_cnt;
unsigned int barrier_serial;
} sched;
} ractor;
#ifdef USE_SIGALTSTACK
void *main_altstack;
#endif
rb_serial_t fork_gen;
struct ccan_list_head waiting_fds; /* <=> struct waiting_fd */
/* set in single-threaded processes only: */
volatile int ubf_async_safe;
unsigned int running: 1;
unsigned int thread_abort_on_exception: 1;
unsigned int thread_report_on_exception: 1;
unsigned int thread_ignore_deadlock: 1;
/* object management */
VALUE mark_object_ary;
struct global_object_list *gloabl_object_list;
const VALUE special_exceptions[ruby_special_error_count];
/* load */
VALUE top_self;
VALUE load_path;
VALUE load_path_snapshot;
VALUE load_path_check_cache;
VALUE expanded_load_path;
VALUE loaded_features;
VALUE loaded_features_snapshot;
VALUE loaded_features_realpaths;
VALUE loaded_features_realpath_map;
struct st_table *loaded_features_index;
struct st_table *loading_table;
// For running the init function of statically linked
// extensions when they are loaded
struct st_table *static_ext_inits;
/* signal */
struct {
VALUE cmd[RUBY_NSIG];
} trap_list;
/* relation table of ensure - rollback for callcc */
struct st_table *ensure_rollback_table;
/* postponed_job (async-signal-safe, and thread-safe) */
struct rb_postponed_job_queue *postponed_job_queue;
int src_encoding_index;
/* workqueue (thread-safe, NOT async-signal-safe) */
struct ccan_list_head workqueue; /* <=> rb_workqueue_job.jnode */
rb_nativethread_lock_t workqueue_lock;
VALUE orig_progname, progname;
VALUE coverages, me2counter;
int coverage_mode;
struct rb_objspace *objspace;
rb_at_exit_list *at_exit;
st_table *frozen_strings;
const struct rb_builtin_function *builtin_function_table;
st_table *ci_table;
struct rb_id_table *negative_cme_table;
st_table *overloaded_cme_table; // cme -> overloaded_cme
// This id table contains a mapping from ID to ICs. It does this with ID
// keys and nested st_tables as values. The nested tables have ICs as keys
// and Qtrue as values. It is used when inline constant caches need to be
// invalidated or ISEQs are being freed.
struct rb_id_table *constant_cache;
#ifndef VM_GLOBAL_CC_CACHE_TABLE_SIZE
#define VM_GLOBAL_CC_CACHE_TABLE_SIZE 1023
#endif
const struct rb_callcache *global_cc_cache_table[VM_GLOBAL_CC_CACHE_TABLE_SIZE]; // vm_eval.c
#if defined(USE_VM_CLOCK) && USE_VM_CLOCK
uint32_t clock;
#endif
/* params */
struct { /* size in byte */
size_t thread_vm_stack_size;
size_t thread_machine_stack_size;
size_t fiber_vm_stack_size;
size_t fiber_machine_stack_size;
} default_params;
} rb_vm_t;
/* default values */
#define RUBY_VM_SIZE_ALIGN 4096
#define RUBY_VM_THREAD_VM_STACK_SIZE ( 128 * 1024 * sizeof(VALUE)) /* 512 KB or 1024 KB */
#define RUBY_VM_THREAD_VM_STACK_SIZE_MIN ( 2 * 1024 * sizeof(VALUE)) /* 8 KB or 16 KB */
#define RUBY_VM_THREAD_MACHINE_STACK_SIZE ( 128 * 1024 * sizeof(VALUE)) /* 512 KB or 1024 KB */
#define RUBY_VM_THREAD_MACHINE_STACK_SIZE_MIN ( 16 * 1024 * sizeof(VALUE)) /* 64 KB or 128 KB */
#define RUBY_VM_FIBER_VM_STACK_SIZE ( 16 * 1024 * sizeof(VALUE)) /* 64 KB or 128 KB */
#define RUBY_VM_FIBER_VM_STACK_SIZE_MIN ( 2 * 1024 * sizeof(VALUE)) /* 8 KB or 16 KB */
#define RUBY_VM_FIBER_MACHINE_STACK_SIZE ( 64 * 1024 * sizeof(VALUE)) /* 256 KB or 512 KB */
#if defined(__powerpc64__) || defined(__ppc64__) // macOS has __ppc64__
#define RUBY_VM_FIBER_MACHINE_STACK_SIZE_MIN ( 32 * 1024 * sizeof(VALUE)) /* 128 KB or 256 KB */
#else
#define RUBY_VM_FIBER_MACHINE_STACK_SIZE_MIN ( 16 * 1024 * sizeof(VALUE)) /* 64 KB or 128 KB */
#endif
#if __has_feature(memory_sanitizer) || __has_feature(address_sanitizer)
/* It seems sanitizers consume A LOT of machine stacks */
#undef RUBY_VM_THREAD_MACHINE_STACK_SIZE
#define RUBY_VM_THREAD_MACHINE_STACK_SIZE (1024 * 1024 * sizeof(VALUE))
#undef RUBY_VM_THREAD_MACHINE_STACK_SIZE_MIN
#define RUBY_VM_THREAD_MACHINE_STACK_SIZE_MIN ( 512 * 1024 * sizeof(VALUE))
#undef RUBY_VM_FIBER_MACHINE_STACK_SIZE
#define RUBY_VM_FIBER_MACHINE_STACK_SIZE ( 256 * 1024 * sizeof(VALUE))
#undef RUBY_VM_FIBER_MACHINE_STACK_SIZE_MIN
#define RUBY_VM_FIBER_MACHINE_STACK_SIZE_MIN ( 128 * 1024 * sizeof(VALUE))
#endif
#ifndef VM_DEBUG_BP_CHECK
#define VM_DEBUG_BP_CHECK 0
#endif
#ifndef VM_DEBUG_VERIFY_METHOD_CACHE
#define VM_DEBUG_VERIFY_METHOD_CACHE (VMDEBUG != 0)
#endif
struct rb_captured_block {
VALUE self;
const VALUE *ep;
union {
const rb_iseq_t *iseq;
const struct vm_ifunc *ifunc;
VALUE val;
} code;
};
enum rb_block_handler_type {
block_handler_type_iseq,
block_handler_type_ifunc,
block_handler_type_symbol,
block_handler_type_proc
};
enum rb_block_type {
block_type_iseq,
block_type_ifunc,
block_type_symbol,
block_type_proc
};
struct rb_block {
union {
struct rb_captured_block captured;
VALUE symbol;
VALUE proc;
} as;
enum rb_block_type type;
};
typedef struct rb_control_frame_struct {
const VALUE *pc; // cfp[0]
VALUE *sp; // cfp[1]
const rb_iseq_t *iseq; // cfp[2]
VALUE self; // cfp[3] / block[0]
const VALUE *ep; // cfp[4] / block[1]
const void *block_code; // cfp[5] / block[2] -- iseq, ifunc, or forwarded block handler
void *jit_return; // cfp[6] -- return address for JIT code
#if VM_DEBUG_BP_CHECK
VALUE *bp_check; // cfp[7]
#endif
} rb_control_frame_t;
extern const rb_data_type_t ruby_threadptr_data_type;
static inline struct rb_thread_struct *
rb_thread_ptr(VALUE thval)
{
return (struct rb_thread_struct *)rb_check_typeddata(thval, &ruby_threadptr_data_type);
}
enum rb_thread_status {
THREAD_RUNNABLE,
THREAD_STOPPED,
THREAD_STOPPED_FOREVER,
THREAD_KILLED
};
#ifdef RUBY_JMP_BUF
typedef RUBY_JMP_BUF rb_jmpbuf_t;
#else
typedef void *rb_jmpbuf_t[5];
#endif
/*
`rb_vm_tag_jmpbuf_t` type represents a buffer used to
long jump to a C frame associated with `rb_vm_tag`.
Use-site of `rb_vm_tag_jmpbuf_t` is responsible for calling the
following functions:
- `rb_vm_tag_jmpbuf_init` once `rb_vm_tag_jmpbuf_t` is allocated.
- `rb_vm_tag_jmpbuf_deinit` once `rb_vm_tag_jmpbuf_t` is no longer necessary.
`RB_VM_TAG_JMPBUF_GET` transforms a `rb_vm_tag_jmpbuf_t` into a
`rb_jmpbuf_t` to be passed to `rb_setjmp/rb_longjmp`.
*/
#if defined(__wasm__) && !defined(__EMSCRIPTEN__)
/*
WebAssembly target with Asyncify-based SJLJ needs
to capture the execution context by unwind/rewind-ing
call frames into a jump buffer. The buffer space tends
to be considerably large unlike other architectures'
register-based buffers.
Therefore, we allocates the buffer on the heap on such
environments.
*/
typedef rb_jmpbuf_t *rb_vm_tag_jmpbuf_t;
#define RB_VM_TAG_JMPBUF_GET(buf) (*buf)
static inline void
rb_vm_tag_jmpbuf_init(rb_vm_tag_jmpbuf_t *jmpbuf)
{
*jmpbuf = ruby_xmalloc(sizeof(rb_jmpbuf_t));
}
static inline void
rb_vm_tag_jmpbuf_deinit(const rb_vm_tag_jmpbuf_t *jmpbuf)
{
ruby_xfree(*jmpbuf);
}
#else
typedef rb_jmpbuf_t rb_vm_tag_jmpbuf_t;
#define RB_VM_TAG_JMPBUF_GET(buf) (buf)
static inline void
rb_vm_tag_jmpbuf_init(rb_vm_tag_jmpbuf_t *jmpbuf)
{
// no-op
}
static inline void
rb_vm_tag_jmpbuf_deinit(const rb_vm_tag_jmpbuf_t *jmpbuf)
{
// no-op
}
#endif
/*
the members which are written in EC_PUSH_TAG() should be placed at
the beginning and the end, so that entire region is accessible.
*/
struct rb_vm_tag {
VALUE tag;
VALUE retval;
rb_vm_tag_jmpbuf_t buf;
struct rb_vm_tag *prev;
enum ruby_tag_type state;
unsigned int lock_rec;
};
STATIC_ASSERT(rb_vm_tag_buf_offset, offsetof(struct rb_vm_tag, buf) > 0);
STATIC_ASSERT(rb_vm_tag_buf_end,
offsetof(struct rb_vm_tag, buf) + sizeof(rb_vm_tag_jmpbuf_t) <
sizeof(struct rb_vm_tag));
struct rb_unblock_callback {
rb_unblock_function_t *func;
void *arg;
};
struct rb_mutex_struct;
typedef struct rb_ensure_entry {
VALUE marker;
VALUE (*e_proc)(VALUE);
VALUE data2;
} rb_ensure_entry_t;
typedef struct rb_ensure_list {
struct rb_ensure_list *next;
struct rb_ensure_entry entry;
} rb_ensure_list_t;
typedef struct rb_fiber_struct rb_fiber_t;
struct rb_waiting_list {
struct rb_waiting_list *next;
struct rb_thread_struct *thread;
struct rb_fiber_struct *fiber;
};
struct rb_execution_context_struct {
/* execution information */
VALUE *vm_stack; /* must free, must mark */
size_t vm_stack_size; /* size in word (byte size / sizeof(VALUE)) */
rb_control_frame_t *cfp;
struct rb_vm_tag *tag;