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#ifndef __JIT_COMPILATION_UNIT_H
#define __JIT_COMPILATION_UNIT_H
#include "arch/registers.h"
#include "arch/stack-frame.h"
#include "jit/basic-block.h"
#include "lib/arena.h"
#include "lib/list.h"
#include "lib/radix-tree.h"
#include "lib/stack.h"
#include "vm/static.h"
#include "vm/types.h"
#include "vm/gc.h"
#include <stdbool.h>
#include <pthread.h>
#include <semaphore.h>
struct buffer;
struct vm_method;
struct insn;
enum machine_reg;
enum compilation_state {
COMPILATION_STATE_INITIAL,
COMPILATION_STATE_COMPILING,
COMPILATION_STATE_COMPILED,
};
enum {
CU_FLAG_ARRAY_OPC,
CU_FLAG_REGALLOC_DONE,
};
struct compilation_unit {
struct vm_method *method;
uint32_t flags;
unsigned long nr_bb;
struct list_head bb_list;
struct basic_block *entry_bb;
struct basic_block *exit_bb;
struct basic_block *unwind_bb;
struct basic_block **bb_df_array; /* depth-first postorder */
struct basic_block **doms;
struct var_info *var_infos;
unsigned long nr_vregs;
struct var_info *fixed_var_infos[NR_FIXED_REGISTERS];
struct buffer *objcode;
/* Mutex that protects ->state */
pthread_mutex_t compile_mutex;
/* See enum compilation_state for values */
unsigned long state;
pthread_mutex_t mutex;
/* The frame pointer for this method. */
struct var_info *frame_ptr;
/* The stack pointer for this method. */
struct var_info *stack_ptr;
/* The stack frame contains information of stack slots for stack-based
arguments, local variables, and spill/reload storage. */
struct stack_frame *stack_frame;
/* It's needed to spill exception object reference at eh entry */
struct stack_slot *exception_spill_slot;
/*
* Pointers inside exit block and unwind block after monitor
* unlocking code. The code is only present if method is
* synchronized. These pointers are used to skip unlocking
* when exception is thrown from that unlocking code.
*/
unsigned char *exit_past_unlock_ptr;
unsigned char *unwind_past_unlock_ptr;
/*
* These are native pointers to basic blocks.
*/
unsigned char *exit_bb_ptr;
unsigned char *unwind_bb_ptr;
/*
* These are used by the SSA part.
*/
struct {
/*
* ssa_var_infos represent renamed virtual registers.
* We need separate sets for this virtual registers to model
* the SSA renaming scheme.
* They will replace the virtual registers in var_infos
* after SSA deconstruction.
*/
struct var_info *ssa_var_infos;
unsigned long ssa_nr_vregs;
/*
* Hashmap that keeps the associations between an instruction
* and its third operand.
*/
struct hash_map *insn_add_ons;
};
struct list_head static_fixup_site_list;
struct list_head call_fixup_site_list;
struct list_head tableswitch_list;
struct list_head lookupswitch_list;
struct list_head ic_call_list;
/*
* Entry points to the method's code. These values are
* valid only when ->is_compiled is true.
* entry_point
* points to method's objcode.
* ic_entry_point
* points to inline_cache_check for this method.
* To be used only when calling from a call-site
* with an inline cache.
*/
void *entry_point;
void *ic_entry_point;
/*
* This maps bytecode offset to every native address
* inside JIT code.
*/
unsigned long *bc_offset_map;
/*
* This maps LIR offset to instruction.
*/
struct radix_tree *lir_insn_map;
unsigned long last_insn;
/*
* Contains native pointers of exception handlers. Indices to
* this table are the same as for exception table in code
* attribute.
*/
void **exception_handlers;
/*
* These stack slot for storing temporary results within one monoburg
* rule where we can not use a register.
*/
struct stack_slot *scratch_slot;
#ifdef CONFIG_ARGS_MAP
struct var_info **non_fixed_args;
#endif
struct arena *arena;
/*
* This is used for ARM where we have an immediate of less than 8 bit
* so, to store the larger immediate we use a constant literal pool
*/
struct lp_entry *pool_head;
unsigned int nr_entries_in_pool;
};
static inline unsigned long nr_bblocks(struct compilation_unit *cu)
{
return cu->nr_bb;
}
static inline void *cu_entry_point(struct compilation_unit *cu)
{
return cu->entry_point;
}
static inline void *cu_ic_entry_point(struct compilation_unit *cu)
{
return cu->ic_entry_point;
}
unsigned long compilation_unit_get_state(struct compilation_unit *cu);
static inline bool compilation_unit_is_compiled(struct compilation_unit *cu)
{
/* Optimistic unlocked check */
if (cu->state == COMPILATION_STATE_COMPILED)
return true;
/* Slowpath */
return compilation_unit_get_state(cu) == COMPILATION_STATE_COMPILED;
}
struct compilation_unit *compilation_unit_alloc(struct vm_method *);
int init_stack_slots(struct compilation_unit *cu);
void free_compilation_unit(struct compilation_unit *);
void shrink_compilation_unit(struct compilation_unit *);
void resolve_fixup_offsets(struct compilation_unit *);
struct var_info *get_var(struct compilation_unit *, enum vm_type);
struct var_info *get_fixed_var(struct compilation_unit *, enum machine_reg);
struct var_info *ssa_get_var(struct compilation_unit *, enum vm_type);
struct var_info *ssa_get_fixed_var(struct compilation_unit *, enum machine_reg);
struct basic_block *find_bb(struct compilation_unit *, unsigned long);
void compute_insn_positions(struct compilation_unit *);
struct stack_slot *get_scratch_slot(struct compilation_unit *);
#define for_each_variable(var, var_list) for (var = var_list; var != NULL; var = var->next)
#endif
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