/
vm_core.h
1976 lines (1639 loc) · 54.4 KB
/
vm_core.h
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/**********************************************************************
vm_core.h -
$Author$
created at: 04/01/01 19:41:38 JST
Copyright (C) 2004-2007 Koichi Sasada
**********************************************************************/
#ifndef RUBY_VM_CORE_H
#define RUBY_VM_CORE_H
/*
* 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/config.h"
#include <stddef.h>
#include <signal.h>
#ifdef HAVE_STDARG_PROTOTYPES
#include <stdarg.h>
#define va_init_list(a,b) va_start((a),(b))
#else
#include <varargs.h>
#define va_init_list(a,b) va_start((a))
#endif
#include "ruby_assert.h"
#if VM_CHECK_MODE > 0
#define VM_ASSERT(expr) RUBY_ASSERT_MESG_WHEN(VM_CHECK_MODE > 0, expr, #expr)
#define VM_UNREACHABLE(func) rb_bug(#func ": unreachable")
#else
#define VM_ASSERT(expr) ((void)0)
#define VM_UNREACHABLE(func) UNREACHABLE
#endif
#include <setjmp.h>
#include "id.h"
#include "internal.h"
#include "internal/array.h"
#include "internal/serial.h"
#include "internal/stdbool.h"
#include "ccan/list/list.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"
#if defined(_WIN32)
#include "thread_win32.h"
#elif defined(HAVE_PTHREAD_H)
#include "thread_pthread.h"
#endif
#define RUBY_VM_THREAD_MODEL 2
/*
* 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)
#else
# define RUBY_SIGCHLD (0)
#endif
/* platforms with broken or non-existent SIGCHLD work by polling */
#if defined(__APPLE__)
# define SIGCHLD_LOSSY (1)
#else
# define SIGCHLD_LOSSY (0)
#endif
/* define to 0 to test old code path */
#define WAITPID_USE_SIGCHLD (RUBY_SIGCHLD || SIGCHLD_LOSSY)
#if defined(SIGSEGV) && defined(HAVE_SIGALTSTACK) && defined(SA_SIGINFO) && !defined(__NetBSD__)
# define USE_SIGALTSTACK
void *rb_register_sigaltstack(void);
# define RB_ALTSTACK_INIT(var) var = rb_register_sigaltstack()
# define RB_ALTSTACK_FREE(var) xfree(var)
# define RB_ALTSTACK(var) var
#else /* noop */
# define RB_ALTSTACK_INIT(var)
# define RB_ALTSTACK_FREE(var)
# define RB_ALTSTACK(var) (0)
#endif
/*****************/
/* 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 */
#if OPT_STACK_CACHING
#undef OPT_STACK_CACHING
#endif /* OPT_STACK_CACHING */
#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;
struct iseq_inline_cache_entry {
rb_serial_t ic_serial;
const rb_cref_t *ic_cref;
VALUE value;
};
struct iseq_inline_iv_cache_entry {
rb_serial_t ic_serial;
size_t index;
};
union iseq_inline_storage_entry {
struct {
struct rb_thread_struct *running_thread;
VALUE value;
} once;
struct iseq_inline_cache_entry cache;
struct iseq_inline_iv_cache_entry iv_cache;
};
struct rb_call_info_kw_arg {
int keyword_len;
VALUE keywords[1];
};
struct rb_call_info_with_kwarg {
struct rb_call_info ci;
struct rb_call_info_kw_arg *kw_arg;
};
struct rb_calling_info {
VALUE block_handler;
VALUE recv;
int argc;
int kw_splat;
};
struct rb_kwarg_call_data {
struct rb_call_cache cc;
struct rb_call_info_with_kwarg ci_kw;
};
struct rb_execution_context_struct;
typedef VALUE (*vm_call_handler)(struct rb_execution_context_struct *ec, struct rb_control_frame_struct *cfp, struct rb_calling_info *calling, struct rb_call_data *cd);
#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 */
VALUE first_lineno; /* TODO: may be unsigned short */
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_mjit_unit;
struct rb_iseq_constant_body {
enum 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
} type; /* instruction sequence 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;
} 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;
struct rb_call_data *call_data; /* A buffer for two arrays:
* struct rb_call_data calls[ci_size];
* struct rb_kwarg_call_data kw_calls[ci_kw_size];
* Such that:
* struct rb_kwarg_call_data *kw_calls = &body->call_data[ci_size];
*/
struct {
rb_snum_t flip_count;
VALUE coverage;
VALUE pc2branchindex;
VALUE *original_iseq;
} variable;
unsigned int local_table_size;
unsigned int is_size;
unsigned int ci_size;
unsigned int ci_kw_size;
unsigned int stack_max; /* for stack overflow check */
char catch_except_p; /* If a frame of this ISeq may catch exception, set TRUE */
#if USE_MJIT
/* The following fields are MJIT related info. */
VALUE (*jit_func)(struct rb_execution_context_struct *,
struct rb_control_frame_struct *); /* function pointer for loaded native code */
long unsigned total_calls; /* number of total calls with `mjit_exec()` */
struct rb_mjit_unit *jit_unit;
#endif
uintptr_t iseq_unique_id; /* -- Remove In 3.0 -- */
};
/* 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;
};
#ifndef USE_LAZY_LOAD
#define USE_LAZY_LOAD 0
#endif
#if USE_LAZY_LOAD
const rb_iseq_t *rb_iseq_complete(const rb_iseq_t *iseq);
#endif
static inline const rb_iseq_t *
rb_iseq_check(const rb_iseq_t *iseq)
{
#if USE_LAZY_LOAD
if (iseq->body == NULL) {
rb_iseq_complete((rb_iseq_t *)iseq);
}
#endif
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
};
enum ruby_basic_operators {
BOP_PLUS,
BOP_MINUS,
BOP_MULT,
BOP_DIV,
BOP_MOD,
BOP_EQ,
BOP_EQQ,
BOP_LT,
BOP_LE,
BOP_LTLT,
BOP_AREF,
BOP_ASET,
BOP_LENGTH,
BOP_SIZE,
BOP_EMPTY_P,
BOP_NIL_P,
BOP_SUCC,
BOP_GT,
BOP_GE,
BOP_NOT,
BOP_NEQ,
BOP_MATCH,
BOP_FREEZE,
BOP_UMINUS,
BOP_MAX,
BOP_MIN,
BOP_CALL,
BOP_AND,
BOP_OR,
BOP_LAST_
};
#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 need_clean;
unsigned int running;
} rb_hook_list_t;
// see builtin.h for definition
typedef const struct rb_builtin_function *RB_BUILTIN;
typedef struct rb_vm_struct {
VALUE self;
rb_global_vm_lock_t gvl;
struct rb_thread_struct *main_thread;
/* persists across uncontended GVL release/acquire for time slice */
const struct rb_thread_struct *running_thread;
#ifdef USE_SIGALTSTACK
void *main_altstack;
#endif
rb_serial_t fork_gen;
rb_nativethread_lock_t waitpid_lock;
struct list_head waiting_pids; /* PID > 0: <=> struct waitpid_state */
struct list_head waiting_grps; /* PID <= 0: <=> struct waitpid_state */
struct list_head waiting_fds; /* <=> struct waiting_fd */
struct list_head living_threads;
VALUE thgroup_default;
int living_thread_num;
/* 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 safe_level_: 1;
int sleeper;
/* object management */
VALUE mark_object_ary;
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;
struct st_table *loaded_features_index;
struct st_table *loading_table;
/* signal */
struct {
VALUE cmd[RUBY_NSIG];
} trap_list;
/* hook */
rb_hook_list_t global_hooks;
/* relation table of ensure - rollback for callcc */
struct st_table *ensure_rollback_table;
/* postponed_job (async-signal-safe, NOT thread-safe) */
struct rb_postponed_job_struct *postponed_job_buffer;
int postponed_job_index;
int src_encoding_index;
/* workqueue (thread-safe, NOT async-signal-safe) */
struct list_head workqueue; /* <=> rb_workqueue_job.jnode */
rb_nativethread_lock_t workqueue_lock;
VALUE verbose, debug, orig_progname, progname;
VALUE coverages;
int coverage_mode;
st_table * defined_module_hash;
struct rb_objspace *objspace;
rb_at_exit_list *at_exit;
VALUE *defined_strings;
st_table *frozen_strings;
const struct rb_builtin_function *builtin_function_table;
int builtin_inline_index;
/* 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;
short redefined_flag[BOP_LAST_];
} 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__)
#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
/* optimize insn */
#define INTEGER_REDEFINED_OP_FLAG (1 << 0)
#define FLOAT_REDEFINED_OP_FLAG (1 << 1)
#define STRING_REDEFINED_OP_FLAG (1 << 2)
#define ARRAY_REDEFINED_OP_FLAG (1 << 3)
#define HASH_REDEFINED_OP_FLAG (1 << 4)
/* #define BIGNUM_REDEFINED_OP_FLAG (1 << 5) */
#define SYMBOL_REDEFINED_OP_FLAG (1 << 6)
#define TIME_REDEFINED_OP_FLAG (1 << 7)
#define REGEXP_REDEFINED_OP_FLAG (1 << 8)
#define NIL_REDEFINED_OP_FLAG (1 << 9)
#define TRUE_REDEFINED_OP_FLAG (1 << 10)
#define FALSE_REDEFINED_OP_FLAG (1 << 11)
#define PROC_REDEFINED_OP_FLAG (1 << 12)
#define BASIC_OP_UNREDEFINED_P(op, klass) (LIKELY((GET_VM()->redefined_flag[(op)]&(klass)) == 0))
#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 or ifunc or forwarded block handler */
VALUE *__bp__; /* cfp[6] */ /* outside vm_push_frame, use vm_base_ptr instead. */
#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
/*
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_jmpbuf_t buf;
struct rb_vm_tag *prev;
enum ruby_tag_type state;
};
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_jmpbuf_t) <
sizeof(struct rb_vm_tag));
struct rb_vm_protect_tag {
struct rb_vm_protect_tag *prev;
};
struct rb_unblock_callback {
rb_unblock_function_t *func;
void *arg;
};
struct rb_mutex_struct;
typedef struct rb_thread_list_struct{
struct rb_thread_list_struct *next;
struct rb_thread_struct *th;
} rb_thread_list_t;
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 char rb_thread_id_string_t[sizeof(rb_nativethread_id_t) * 2 + 3];
typedef struct rb_fiber_struct rb_fiber_t;
typedef 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;
struct rb_vm_protect_tag *protect_tag;
/* interrupt flags */
rb_atomic_t interrupt_flag;
rb_atomic_t interrupt_mask; /* size should match flag */
rb_fiber_t *fiber_ptr;
struct rb_thread_struct *thread_ptr;
/* storage (ec (fiber) local) */
st_table *local_storage;
VALUE local_storage_recursive_hash;
VALUE local_storage_recursive_hash_for_trace;
/* eval env */
const VALUE *root_lep;
VALUE root_svar;
/* ensure & callcc */
rb_ensure_list_t *ensure_list;
/* trace information */
struct rb_trace_arg_struct *trace_arg;
/* temporary places */
VALUE errinfo;
VALUE passed_block_handler; /* for rb_iterate */
uint8_t raised_flag; /* only 3 bits needed */
/* n.b. only 7 bits needed, really: */
BITFIELD(enum method_missing_reason, method_missing_reason, 8);
VALUE private_const_reference;
/* for GC */
struct {
VALUE *stack_start;
VALUE *stack_end;
size_t stack_maxsize;
RUBY_ALIGNAS(SIZEOF_VALUE) jmp_buf regs;
} machine;
} rb_execution_context_t;
// for builtin.h
#define VM_CORE_H_EC_DEFINED 1
// Set the vm_stack pointer in the execution context.
void rb_ec_set_vm_stack(rb_execution_context_t *ec, VALUE *stack, size_t size);
// Initialize the vm_stack pointer in the execution context and push the initial stack frame.
// @param ec the execution context to update.
// @param stack a pointer to the stack to use.
// @param size the size of the stack, as in `VALUE stack[size]`.
void rb_ec_initialize_vm_stack(rb_execution_context_t *ec, VALUE *stack, size_t size);
// Clear (set to `NULL`) the vm_stack pointer.
// @param ec the execution context to update.
void rb_ec_clear_vm_stack(rb_execution_context_t *ec);
typedef struct rb_thread_struct {
struct list_node vmlt_node;
VALUE self;
rb_vm_t *vm;
rb_execution_context_t *ec;
VALUE last_status; /* $? */
/* for cfunc */
struct rb_calling_info *calling;
/* for load(true) */
VALUE top_self;
VALUE top_wrapper;
/* thread control */
rb_nativethread_id_t thread_id;
#ifdef NON_SCALAR_THREAD_ID
rb_thread_id_string_t thread_id_string;
#endif
BITFIELD(enum rb_thread_status, status, 2);
/* bit flags */
unsigned int to_kill : 1;
unsigned int abort_on_exception: 1;
unsigned int report_on_exception: 1;
unsigned int pending_interrupt_queue_checked: 1;
int8_t priority; /* -3 .. 3 (RUBY_THREAD_PRIORITY_{MIN,MAX}) */
uint32_t running_time_us; /* 12500..800000 */
native_thread_data_t native_thread_data;
void *blocking_region_buffer;
VALUE thgroup;
VALUE value;
/* temporary place of retval on OPT_CALL_THREADED_CODE */
#if OPT_CALL_THREADED_CODE
VALUE retval;
#endif
/* async errinfo queue */
VALUE pending_interrupt_queue;
VALUE pending_interrupt_mask_stack;
/* interrupt management */
rb_nativethread_lock_t interrupt_lock;
struct rb_unblock_callback unblock;
VALUE locking_mutex;
struct rb_mutex_struct *keeping_mutexes;
rb_thread_list_t *join_list;
union {
struct {
VALUE proc;
VALUE args;
int kw_splat;
} proc;
struct {
VALUE (*func)(void *);
void *arg;
} func;
} invoke_arg;
enum {
thread_invoke_type_none = 0,
thread_invoke_type_proc,
thread_invoke_type_func
} invoke_type;
/* statistics data for profiler */
VALUE stat_insn_usage;
/* fiber */
rb_fiber_t *root_fiber;
rb_jmpbuf_t root_jmpbuf;
/* misc */
VALUE name;
} rb_thread_t;