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8sa1-gcc/gcc/function.h
Teemu Torma 154bba13a4 [multiple changes] 
Thu Dec 11 20:42:18 1997  Teemu Torma  <tot@trema.com>

	Thread-safe EH support for pthreads, DCE threads and Solaris threads.

	* integrate.c (expand_inline_function): If the inline fn uses eh
	context, make sure that the current fn has one.
	* toplev.c (rest_of_compilation): Call emit_eh_context.
	* except.c (use_eh_context): New fn.
	(get_eh_context_once): New fn.
	(call_get_eh_context): New fn.
	(emit_eh_context): New fn.
	(get_eh_context): Call either get_eh_context_once or
	call_get_eh_context, depending on what we have.
	(get_dynamic_handler_chain): Call get_eh_context_once.
	* except.h: Prototypes for fns above.
	* optabs.c (get_eh_context_libfunc): Removed.
	(init_optabs): Don't initialize it.
	* expr.h (get_eh_context_libfunc): Removed.
	* rtl.h, rtl.c: New reg_note REG_EH_CONTEXT.
	* config/pa/pa.h (CPP_SPEC): Support for -threads.
	* config/pa/pa-hpux10.h (LIB_SPEC): Ditto.
	* config/pa/t-pa (MULTILIB_OPTIONS, MULTILIB_DIRNAMES):
	New multilib for -threads.
	* config/sparc/t-sol2: Added multilibs for -threads and
	made -pthreads alias to it.
	* config/sparc/sol2.h (CPP_SPEC, LIB_SPEC):
	Added -threads and -pthreads options.
	* libgcc-thr.h: New file.
	* libgcc2.c: (__get_cpp_eh_context): Removed.
	(struct cpp_eh_context): Removed.
	(struct eh_context): Replaced cpp_eh_context with generic language
	specific pointer.
	(__get_eh_info): New function.
	(__throw): Check eh_context::info.
	(__sjthrow): Ditto.
	* libgcc2.c: Include libgcc-thr.h.
	(new_eh_context, __get_eh_context,
	eh_pthread_initialize, eh_context_initialize, eh_context_static,
	eh_context_specific, eh_context_free): New functions.
	(get_eh_context, eh_context_key): New variables.
	(__sjthrow, __sjpopnthrow, __eh_pcnthrow, __throw): Use
	get_eh_context to get the context.
	(longjmp): Move the declaration inside
	#ifdef DONT_USE_BUILTIN_SETJMP.
	* frame.c: Include libgcc-thr.h.
	(object_mutex): Mutex to protect the object list.
	(find_fde, __register_frame, __register_frame_table,
	__deregister_frame): Hold the lock while accessing objects.
	* except.h (get_eh_context): Declare.
	* except.c (current_function_ehc): Define.
	(current_function_dhc, current_function_dcc): Removed.
	(get_eh_context): New function.
	(get_dynamic_handler_chain): Use get_eh_context.
	(get_saved_pc_ref): Ditto.
	(get_dynamic_cleanup_chain): Removed references to
	current_function_dcc.
	(save_eh_status, restore_eh_status): Save and restore
	current_function_ehc instead.
	* optabs.c (get_eh_context_libfunc): New variable.
	(init_optabs): Initialize it.
	* expr.h: Declare get_eh_context_libfunc.
	* function.h (struct function): Replaced dhc and dcc with ehc.
	* except.c (get_saved_pc_ref): New functions.
	(eh_saved_pc_rtx, eh_saved_pc): Deleted.
	(expand_internal_throw_indirect): Use get_saved_pc_ref() instead
	of eh_saved_pc.
	(end_eh_unwinder): Likewise.
	(init_eh): Remove initialization of eh_saved_pc.
	* optabs.c (get_saved_pc_libfunc): New variable.
	(init_optabs): Initialize it.
	* expr.h: Declare get_saved_pc_libfunc.
	* except.h (eh_saved_pc_rtx): Deleted.
	(get_saved_pc_ref): Declared.

	From Scott Snyder <snyder@d0sgif.fnal.gov>:
	* libgcc2.c (__get_saved_pc): New.
	(__eh_type, __eh_pc): Deleted.
	(__eh_pcnthrow): Use __get_saved_pc() instead of __eh_pc.
	(__get_dynamic_handler_chain): Move __dynamic_handler_chain inside
	this fcn.

cp/:
Thu Dec 11 20:43:33 1997  Teemu Torma  <tot@trema.com>

	* decl.c (ptr_ptr_type_node): Define.
	(init_decl_processing): Initialize it.
	* cp-tree.h: Declare it.
	* exception.cc (__cp_exception_info): Use __get_eh_info.
	(__cp_push_exception): Ditto.
	(__cp_pop_exception): Ditto.

	From Scott Snyder <snyder@d0sgif.fnal.gov>:
        * except.c (expand_builtin_throw): Use get_saved_pc_ref instead of
	saved_pc.
	(init_exception_processing): Removed saved_pc initialization.

From-SVN: r17052
1997-12-11 23:53:20 -05:00

263 lines
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/* Structure for saving state for a nested function.
Copyright (C) 1989, 92, 93, 94, 95, 96, 1997 Free Software Foundation, Inc.
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef NULL_TREE
#define tree int *
#endif
#ifndef GET_CODE
#define rtx int *
#endif
struct var_refs_queue
{
rtx modified;
enum machine_mode promoted_mode;
int unsignedp;
struct var_refs_queue *next;
};
/* Stack of pending (incomplete) sequences saved by `start_sequence'.
Each element describes one pending sequence.
The main insn-chain is saved in the last element of the chain,
unless the chain is empty. */
struct sequence_stack
{
/* First and last insns in the chain of the saved sequence. */
rtx first, last;
tree sequence_rtl_expr;
struct sequence_stack *next;
};
extern struct sequence_stack *sequence_stack;
/* Stack of single obstacks. */
struct simple_obstack_stack
{
struct obstack *obstack;
struct simple_obstack_stack *next;
};
/* This structure can save all the important global and static variables
describing the status of the current function. */
struct function
{
struct function *next;
/* For function.c. */
char *name;
tree decl;
int pops_args;
int returns_struct;
int returns_pcc_struct;
int returns_pointer;
int needs_context;
int calls_setjmp;
int calls_longjmp;
int calls_alloca;
int has_nonlocal_label;
int has_nonlocal_goto;
int contains_functions;
int is_thunk;
rtx nonlocal_goto_handler_slot;
rtx nonlocal_goto_stack_level;
tree nonlocal_labels;
int args_size;
int pretend_args_size;
rtx arg_offset_rtx;
int varargs;
int stdarg;
int max_parm_reg;
rtx *parm_reg_stack_loc;
int outgoing_args_size;
rtx return_rtx;
rtx cleanup_label;
rtx return_label;
rtx save_expr_regs;
rtx stack_slot_list;
rtx parm_birth_insn;
HOST_WIDE_INT frame_offset;
rtx tail_recursion_label;
rtx tail_recursion_reentry;
rtx internal_arg_pointer;
rtx arg_pointer_save_area;
tree rtl_expr_chain;
rtx last_parm_insn;
tree context_display;
tree trampoline_list;
int function_call_count;
struct temp_slot *temp_slots;
int temp_slot_level;
/* This slot is initialized as 0 and is added to
during the nested function. */
struct var_refs_queue *fixup_var_refs_queue;
CUMULATIVE_ARGS args_info;
/* For stmt.c */
struct nesting *block_stack;
struct nesting *stack_block_stack;
struct nesting *cond_stack;
struct nesting *loop_stack;
struct nesting *case_stack;
struct nesting *nesting_stack;
int nesting_depth;
int block_start_count;
tree last_expr_type;
rtx last_expr_value;
int expr_stmts_for_value;
char *emit_filename;
int emit_lineno;
struct goto_fixup *goto_fixup_chain;
/* For exception handling information. */
struct eh_stack ehstack;
struct eh_queue ehqueue;
rtx catch_clauses;
struct label_node *false_label_stack;
struct label_node *caught_return_label_stack;
tree protect_list;
rtx ehc;
/* For expr.c. */
int pending_stack_adjust;
int inhibit_defer_pop;
rtx saveregs_value;
rtx apply_args_value;
rtx forced_labels;
/* For emit-rtl.c. */
int reg_rtx_no;
int first_label_num;
rtx first_insn;
rtx last_insn;
tree sequence_rtl_expr;
struct sequence_stack *sequence_stack;
int cur_insn_uid;
int last_linenum;
char *last_filename;
char *regno_pointer_flag;
char *regno_pointer_align;
int regno_pointer_flag_length;
rtx *regno_reg_rtx;
/* For stor-layout.c. */
tree permanent_type_chain;
tree temporary_type_chain;
tree permanent_type_end;
tree temporary_type_end;
tree pending_sizes;
int immediate_size_expand;
/* For tree.c. */
int all_types_permanent;
struct momentary_level *momentary_stack;
char *maybepermanent_firstobj;
char *temporary_firstobj;
char *momentary_firstobj;
char *momentary_function_firstobj;
struct obstack *current_obstack;
struct obstack *function_obstack;
struct obstack *function_maybepermanent_obstack;
struct obstack *expression_obstack;
struct obstack *saveable_obstack;
struct obstack *rtl_obstack;
struct simple_obstack_stack *inline_obstacks;
/* For integrate.c. */
int uses_const_pool;
/* For md files. */
int uses_pic_offset_table;
/* tm.h can use this to store whatever it likes. */
struct machine_function *machine;
/* For reorg. */
rtx epilogue_delay_list;
/* For varasm. */
struct constant_descriptor **const_rtx_hash_table;
struct pool_sym **const_rtx_sym_hash_table;
struct pool_constant *first_pool, *last_pool;
int pool_offset;
rtx const_double_chain;
};
/* The FUNCTION_DECL for an inline function currently being expanded. */
extern tree inline_function_decl;
/* Label that will go on function epilogue.
Jumping to this label serves as a "return" instruction
on machines which require execution of the epilogue on all returns. */
extern rtx return_label;
/* List (chain of EXPR_LISTs) of all stack slots in this function.
Made for the sake of unshare_all_rtl. */
extern rtx stack_slot_list;
/* Given a function decl for a containing function,
return the `struct function' for it. */
struct function *find_function_data PROTO((tree));
/* Pointer to chain of `struct function' for containing functions. */
extern struct function *outer_function_chain;
/* Put all this function's BLOCK nodes into a vector and return it.
Also store in each NOTE for the beginning or end of a block
the index of that block in the vector. */
extern tree *identify_blocks PROTO((tree, rtx));
/* Return size needed for stack frame based on slots so far allocated.
This size counts from zero. It is not rounded to STACK_BOUNDARY;
the caller may have to do that. */
extern HOST_WIDE_INT get_frame_size PROTO((void));
/* These variables hold pointers to functions to
save and restore machine-specific data,
in push_function_context and pop_function_context. */
extern void (*save_machine_status) PROTO((struct function *));
extern void (*restore_machine_status) PROTO((struct function *));
/* Save and restore status information for a nested function. */
extern void save_tree_status PROTO((struct function *, tree));
extern void restore_tree_status PROTO((struct function *, tree));
extern void save_varasm_status PROTO((struct function *, tree));
extern void restore_varasm_status PROTO((struct function *));
extern void save_eh_status PROTO((struct function *));
extern void restore_eh_status PROTO((struct function *));
extern void save_stmt_status PROTO((struct function *));
extern void restore_stmt_status PROTO((struct function *));
extern void save_expr_status PROTO((struct function *));
extern void restore_expr_status PROTO((struct function *));
extern void save_emit_status PROTO((struct function *));
extern void restore_emit_status PROTO((struct function *));
extern void save_storage_status PROTO((struct function *));
extern void restore_storage_status PROTO((struct function *));
#ifdef rtx
#undef rtx
#endif
#ifdef tree
#undef tree
#endif
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