/* Implements exception handling.
- Copyright (C) 1989-2013 Free Software Foundation, Inc.
+ Copyright (C) 1989-2014 Free Software Foundation, Inc.
Contributed by Mike Stump <mrs@cygnus.com>.
This file is part of GCC.
#include "insn-config.h"
#include "except.h"
#include "hard-reg-set.h"
-#include "basic-block.h"
#include "output.h"
#include "dwarf2asm.h"
#include "dwarf2out.h"
#include "toplev.h"
#include "hash-table.h"
#include "intl.h"
-#include "ggc.h"
#include "tm_p.h"
#include "target.h"
#include "common/common-target.h"
#include "diagnostic.h"
#include "tree-pretty-print.h"
#include "tree-pass.h"
-#include "gimple.h"
#include "cfgloop.h"
+#include "builtins.h"
/* Provide defaults for stuff that may not be defined when using
sjlj exceptions. */
return entry->filter == data->filter && entry->next == data->next;
}
-typedef hash_table
<action_record_hasher> action_hash_type;
+typedef hash_table<action_record_hasher> action_hash_type;
\f
static bool get_eh_region_and_lp_from_rtx (const_rtx, eh_region *,
eh_landing_pad *);
static void dw2_build_landing_pads (void);
-static int collect_one_action_chain (action_hash_type, eh_region);
+static int collect_one_action_chain (action_hash_type *, eh_region);
static int add_call_site (rtx, int, int);
static void push_uleb128 (vec<uchar, va_gc> **, unsigned int);
tmp = size_int (FIRST_PSEUDO_REGISTER + 2 - 1);
#endif
#else
- /* builtin_setjmp takes a pointer to 5 words. */
- tmp = size_int (5 * BITS_PER_WORD / POINTER_SIZE - 1);
+ /* Compute a minimally sized jump buffer. We need room to store at
+ least 3 pointers - stack pointer, frame pointer and return address.
+ Plus for some targets we need room for an extra pointer - in the
+ case of MIPS this is the global pointer. This makes a total of four
+ pointers, but to be safe we actually allocate room for 5.
+
+ If pointers are smaller than words then we allocate enough room for
+ 5 words, just in case the backend needs this much room. For more
+ discussion on this issue see:
+ http://gcc.gnu.org/ml/gcc-patches/2014-05/msg00313.html. */
+ if (POINTER_SIZE > BITS_PER_WORD)
+ tmp = size_int (5 - 1);
+ else
+ tmp = size_int ((5 * BITS_PER_WORD / POINTER_SIZE) - 1);
#endif
+
tmp = build_index_type (tmp);
tmp = build_array_type (ptr_type_node, tmp);
f_jbuf = build_decl (BUILTINS_LOCATION,
void
init_eh_for_function (void)
{
- cfun->eh = ggc_alloc_cleared_eh_status ();
+ cfun->eh = ggc_cleared_alloc<eh_status> ();
/* Make sure zero'th entries are used. */
vec_safe_push (cfun->eh->region_array, (eh_region)0);
eh_region new_eh;
/* Insert a new blank region as a leaf in the tree. */
- new_eh = ggc_alloc_cleared_eh_region_d ();
+ new_eh = ggc_cleared_alloc<eh_region_d> ();
new_eh->type = type;
new_eh->outer = outer;
if (outer)
add_type_for_runtime (TREE_VALUE (type_node));
}
- c = ggc_alloc_cleared_eh_catch_d ();
+ c = ggc_cleared_alloc<eh_catch_d> ();
c->type_list = type_list;
l = t->u.eh_try.last_catch;
c->prev_catch = l;
eh_landing_pad
gen_eh_landing_pad (eh_region region)
{
- eh_landing_pad lp = ggc_alloc_cleared_eh_landing_pad_d ();
+ eh_landing_pad lp = ggc_cleared_alloc<eh_landing_pad_d> ();
lp->next_lp = region->landing_pads;
lp->region = region;
{
duplicate_eh_regions_map label_map;
void *label_map_data;
- struct pointer_map_t *eh_map;
+ hash_map<void *, void *> *eh_map;
};
static void
{
eh_landing_pad old_lp, new_lp;
eh_region new_r;
- void **slot;
new_r = gen_eh_region (old_r->type, outer);
- slot = pointer_map_insert (data->eh_map, (void *)old_r);
- gcc_assert (*slot == NULL);
- *slot = (void *)new_r;
+ gcc_assert (!data->eh_map->put (old_r, new_r));
switch (old_r->type)
{
continue;
new_lp = gen_eh_landing_pad (new_r);
- slot = pointer_map_insert (data->eh_map, (void *)old_lp);
- gcc_assert (*slot == NULL);
- *slot = (void *)new_lp;
+ gcc_assert (!data->eh_map->put (old_lp, new_lp));
new_lp->post_landing_pad
= data->label_map (old_lp->post_landing_pad, data->label_map_data);
that allows the caller to remap uses of both EH regions and
EH landing pads. */
-struct pointer_map_t *
+hash_map<void *, void *> *
duplicate_eh_regions (struct function *ifun,
eh_region copy_region, int outer_lp,
duplicate_eh_regions_map map, void *map_data)
data.label_map = map;
data.label_map_data = map_data;
- data.eh_map = pointer_map_create ();
+ data.eh_map = new hash_map<void *, void *>;
outer_region = get_eh_region_from_lp_number (outer_lp);
return TREE_HASH (entry->t);
}
-typedef hash_table <ttypes_filter_hasher> ttypes_hash_type;
+typedef hash_table<ttypes_filter_hasher> ttypes_hash_type;
/* Helper for ehspec hashing. */
return h;
}
-typedef hash_table <ehspec_hasher> ehspec_hash_type;
+typedef hash_table<ehspec_hasher> ehspec_hash_type;
/* Add TYPE (which may be NULL) to cfun->eh->ttype_data, using TYPES_HASH
to speed up the search. Return the filter value to be used. */
static int
-add_ttypes_entry (ttypes_hash_type ttypes_hash, tree type)
+add_ttypes_entry (ttypes_hash_type *ttypes_hash, tree type)
{
struct ttypes_filter **slot, *n;
- slot = ttypes_hash.find_slot_with_hash (type, (hashval_t) TREE_HASH (type),
+ slot = ttypes_hash->find_slot_with_hash (type, (hashval_t) TREE_HASH (type),
INSERT);
if ((n = *slot) == NULL)
to speed up the search. Return the filter value to be used. */
static int
-add_ehspec_entry (ehspec_hash_type ehspec_hash, ttypes_hash_type ttypes_hash,
+add_ehspec_entry (ehspec_hash_type *ehspec_hash, ttypes_hash_type *ttypes_hash,
tree list)
{
struct ttypes_filter **slot, *n;
struct ttypes_filter dummy;
dummy.t = list;
- slot = ehspec_hash.find_slot (&dummy, INSERT);
+ slot = ehspec_hash->find_slot (&dummy, INSERT);
if ((n = *slot) == NULL)
{
assign_filter_values (void)
{
int i;
- ttypes_hash_type ttypes;
- ehspec_hash_type ehspec;
eh_region r;
eh_catch c;
else
vec_alloc (cfun->eh->ehspec_data.other, 64);
- ttypes.create (31);
- ehspec.create (31);
+ ehspec_hash_type ehspec (31);
+ ttypes_hash_type ttypes (31);
for (i = 1; vec_safe_iterate (cfun->eh->region_array, i, &r); ++i)
{
for ( ; tp_node; tp_node = TREE_CHAIN (tp_node))
{
- int flt = add_ttypes_entry (ttypes, TREE_VALUE (tp_node));
+ int flt
+ = add_ttypes_entry (&ttypes, TREE_VALUE (tp_node));
tree flt_node = build_int_cst (integer_type_node, flt);
c->filter_list
{
/* Get a filter value for the NULL list also since it
will need an action record anyway. */
- int flt = add_ttypes_entry (ttypes, NULL);
+ int flt = add_ttypes_entry (&ttypes, NULL);
tree flt_node = build_int_cst (integer_type_node, flt);
c->filter_list
case ERT_ALLOWED_EXCEPTIONS:
r->u.allowed.filter
- = add_ehspec_entry (ehspec, ttypes, r->u.allowed.type_list);
+ = add_ehspec_entry (&ehspec, &ttypes, r->u.allowed.type_list);
break;
default:
break;
}
}
-
- ttypes.dispose ();
- ehspec.dispose ();
}
/* Emit SEQ into basic block just before INSN (that is assumed to be
first instruction of some existing BB and return the newly
produced block. */
static basic_block
-emit_to_new_bb_before (rtx seq, rtx insn)
+emit_to_new_bb_before (rtx_insn *seq, rtx insn)
{
- rtx last;
- basic_block bb, prev_bb;
+ rtx_insn *last;
+ basic_block bb;
edge e;
edge_iterator ei;
last = emit_insn_before (seq, insn);
if (BARRIER_P (last))
last = PREV_INSN (last);
- prev_bb = BLOCK_FOR_INSN (insn)->prev_bb;
- bb = create_basic_block (seq, last, prev_bb);
+ bb = create_basic_block (seq, last, BLOCK_FOR_INSN (insn)->prev_bb);
update_bb_for_insn (bb);
bb->flags |= BB_SUPERBLOCK;
return bb;
for (i = 1; vec_safe_iterate (cfun->eh->lp_array, i, &lp); ++i)
{
basic_block bb;
- rtx seq;
+ rtx_insn *seq;
edge e;
if (lp == NULL || lp->post_landing_pad == NULL)
static int
sjlj_assign_call_site_values (void)
{
- action_hash_type ar_hash;
+ action_hash_type ar_hash (31);
int i, disp_index;
eh_landing_pad lp;
vec_alloc (crtl->eh.action_record_data, 64);
- ar_hash.create (31);
disp_index = 0;
call_site_base = 1;
int action, call_site;
/* First: build the action table. */
- action = collect_one_action_chain (ar_hash, lp->region);
+ action = collect_one_action_chain (&ar_hash, lp->region);
/* Next: assign call-site values. If dwarf2 terms, this would be
the region number assigned by convert_to_eh_region_ranges, but
disp_index++;
}
- ar_hash.dispose ();
-
return disp_index;
}
sjlj_mark_call_sites (void)
{
int last_call_site = -2;
- rtx insn, mem;
+ rtx_insn *insn;
+ rtx mem;
for (insn = get_insns (); insn ; insn = NEXT_INSN (insn))
{
eh_region r;
bool nothrow;
int this_call_site;
- rtx before, p;
+ rtx_insn *before, *p;
/* Reset value tracking at extended basic block boundaries. */
if (LABEL_P (insn))
/* Construct the SjLj_Function_Context. */
static void
-sjlj_emit_function_enter (rtx dispatch_label)
+sjlj_emit_function_enter (rtx_code_label *dispatch_label)
{
- rtx fn_begin, fc, mem, seq;
+ rtx_insn *fn_begin, *seq;
+ rtx fc, mem;
bool fn_begin_outside_block;
rtx personality = get_personality_function (current_function_decl);
}
if (fn_begin_outside_block)
- insert_insn_on_edge (seq, single_succ_edge (ENTRY_BLOCK_PTR));
+ insert_insn_on_edge (seq, single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun)));
else
emit_insn_after (seq, fn_begin);
}
the call to unwind_sjlj_unregister_libfunc if needed. */
void
-sjlj_emit_function_exit_after (rtx after)
+sjlj_emit_function_exit_after (rtx_insn *after)
{
crtl->eh.sjlj_exit_after = after;
}
static void
sjlj_emit_function_exit (void)
{
- rtx seq, insn;
+ rtx_insn *seq, *insn;
start_sequence ();
}
static void
-sjlj_emit_dispatch_table (rtx dispatch_label, int num_dispatch)
+sjlj_emit_dispatch_table (rtx_code_label *dispatch_label, int num_dispatch)
{
enum machine_mode unwind_word_mode = targetm.unwind_word_mode ();
enum machine_mode filter_mode = targetm.eh_return_filter_mode ();
eh_landing_pad lp;
- rtx mem, seq, fc, before, exc_ptr_reg, filter_reg;
+ rtx mem, fc, before, exc_ptr_reg, filter_reg;
+ rtx_insn *seq;
rtx first_reachable_label;
basic_block bb;
eh_region r;
CFG edges more exactly, we can use the forced_labels list instead. */
LABEL_PRESERVE_P (dispatch_label) = 1;
forced_labels
- = gen_rtx_EXPR_LIST (VOIDmode, dispatch_label, forced_labels);
+ = gen_rtx_INSN_LIST (VOIDmode, dispatch_label, forced_labels);
#endif
/* Load up exc_ptr and filter values from the function context. */
for (i = 1; vec_safe_iterate (cfun->eh->lp_array, i, &lp); ++i)
if (lp && lp->post_landing_pad)
{
- rtx seq2, label;
+ rtx_insn *seq2;
+ rtx label;
start_sequence ();
num_dispatch = sjlj_assign_call_site_values ();
if (num_dispatch > 0)
{
- rtx dispatch_label = gen_label_rtx ();
+ rtx_code_label *dispatch_label = gen_label_rtx ();
int align = STACK_SLOT_ALIGNMENT (sjlj_fc_type_node,
TYPE_MODE (sjlj_fc_type_node),
TYPE_ALIGN (sjlj_fc_type_node));
align);
sjlj_mark_call_sites ();
- sjlj_emit_function_enter (NULL_RTX);
+ sjlj_emit_function_enter (NULL);
sjlj_emit_function_exit ();
}
if (targetm_common.except_unwind_info (&global_options) == UI_SJLJ
/* Kludge for Alpha (see alpha_gp_save_rtx). */
- || single_succ_edge (ENTRY_BLOCK_PTR)->insns.r)
+ || single_succ_edge (ENTRY_BLOCK_PTR_FOR_FN (cfun))->insns.r)
commit_edge_insertions ();
/* Redirect all EH edges from the post_landing_pad to the landing pad. */
- FOR_EACH_BB (bb)
+ FOR_EACH_BB_FN (bb, cfun)
{
eh_landing_pad lp;
edge_iterator ei;
to look for a note, or the note itself. */
void
-copy_reg_eh_region_note_forward (rtx note_or_insn, rtx first, rtx last)
+copy_reg_eh_region_note_forward (rtx note_or_insn, rtx_insn *first, rtx last)
{
- rtx insn, note = note_or_insn;
+ rtx_insn *insn;
+ rtx note = note_or_insn;
if (INSN_P (note_or_insn))
{
/* Likewise, but iterate backward. */
void
-copy_reg_eh_region_note_backward (rtx note_or_insn, rtx last, rtx first)
+copy_reg_eh_region_note_backward (rtx note_or_insn, rtx_insn *last, rtx first)
{
- rtx insn, note = note_or_insn;
+ rtx_insn *insn;
+ rtx note = note_or_insn;
if (INSN_P (note_or_insn))
{
if (NONJUMP_INSN_P (insn)
&& GET_CODE (PATTERN (insn)) == SEQUENCE)
{
- rtx seq = PATTERN (insn);
- int i, n = XVECLEN (seq, 0);
+ rtx_sequence *seq = as_a <rtx_sequence *> (PATTERN (insn));
+ int i, n = seq->len ();
for (i = 0; i < n; i++)
- if (can_throw_external (XVECEXP (seq, 0, i)))
+ if (can_throw_external (seq->element (i)))
return true;
return false;
if (NONJUMP_INSN_P (insn)
&& GET_CODE (PATTERN (insn)) == SEQUENCE)
{
- rtx seq = PATTERN (insn);
- int i, n = XVECLEN (seq, 0);
+ rtx_sequence *seq = as_a <rtx_sequence *> (PATTERN (insn));
+ int i, n = seq->len ();
for (i = 0; i < n; i++)
- if (!insn_nothrow_p (XVECEXP (seq, 0, i)))
+ if (!insn_nothrow_p (seq->element (i)))
return false;
return true;
static unsigned int
set_nothrow_function_flags (void)
{
- rtx insn;
+ rtx_insn *insn;
crtl->nothrow = 1;
}
if (crtl->nothrow
- && (cgraph_function_body_availability (cgraph_get_node
- (current_function_decl))
+ && (cgraph_node::get (current_function_decl)->get_availability ()
>= AVAIL_AVAILABLE))
{
- struct cgraph_node *node = cgraph_get_node (current_function_decl);
+ struct cgraph_node *node = cgraph_node::get (current_function_decl);
struct cgraph_edge *e;
for (e = node->callers; e; e = e->next_caller)
e->can_throw_external = false;
- cgraph_set_nothrow_flag (node, true);
+ node->set_nothrow_flag (true);
if (dump_file)
fprintf (dump_file, "Marking function nothrow: %s\n\n",
RTL_PASS, /* type */
"nothrow", /* name */
OPTGROUP_NONE, /* optinfo_flags */
- false, /* has_gate */
- true, /* has_execute */
TV_NONE, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
{}
/* opt_pass methods: */
- unsigned int execute () { return set_nothrow_function_flags (); }
+ virtual unsigned int execute (function *)
+ {
+ return set_nothrow_function_flags ();
+ }
}; // class pass_set_nothrow_function_flags
void
expand_eh_return (void)
{
- rtx around_label;
+ rtx_code_label *around_label;
if (! crtl->eh.ehr_label)
return;
}
\f
static int
-add_action_record (action_hash_type ar_hash, int filter, int next)
+add_action_record (action_hash_type *ar_hash, int filter, int next)
{
struct action_record **slot, *new_ar, tmp;
tmp.filter = filter;
tmp.next = next;
- slot = ar_hash.find_slot (&tmp, INSERT);
+ slot = ar_hash->find_slot (&tmp, INSERT);
if ((new_ar = *slot) == NULL)
{
}
static int
-collect_one_action_chain (action_hash_type ar_hash, eh_region region)
+collect_one_action_chain (action_hash_type *ar_hash, eh_region region)
{
int next;
{
call_site_record record;
- record = ggc_alloc_call_site_record_d ();
+ record = ggc_alloc<call_site_record_d> ();
record->landing_pad = landing_pad;
record->action = action;
return call_site_base + crtl->eh.call_site_record_v[section]->length () - 1;
}
+static rtx_note *
+emit_note_eh_region_end (rtx insn)
+{
+ rtx_insn *next = NEXT_INSN (insn);
+
+ /* Make sure we do not split a call and its corresponding
+ CALL_ARG_LOCATION note. */
+ if (next && NOTE_P (next)
+ && NOTE_KIND (next) == NOTE_INSN_CALL_ARG_LOCATION)
+ insn = next;
+
+ return emit_note_after (NOTE_INSN_EH_REGION_END, insn);
+}
+
/* Turn REG_EH_REGION notes back into NOTE_INSN_EH_REGION notes.
The new note numbers will not refer to region numbers, but
instead to call site entries. */
static unsigned int
convert_to_eh_region_ranges (void)
{
- rtx insn, iter, note;
- action_hash_type ar_hash;
+ rtx insn;
+ rtx_insn *iter;
+ rtx_note *note;
+ action_hash_type ar_hash (31);
int last_action = -3;
- rtx last_action_insn = NULL_RTX;
+ rtx_insn *last_action_insn = NULL;
rtx last_landing_pad = NULL_RTX;
- rtx first_no_action_insn = NULL_RTX;
+ rtx_insn *first_no_action_insn = NULL;
int call_site = 0;
int cur_sec = 0;
rtx section_switch_note = NULL_RTX;
- rtx first_no_action_insn_before_switch = NULL_RTX;
- rtx last_no_action_insn_before_switch = NULL_RTX;
+ rtx_insn *first_no_action_insn_before_switch = NULL;
+ rtx_insn *last_no_action_insn_before_switch = NULL;
int saved_call_site_base = call_site_base;
vec_alloc (crtl->eh.action_record_data, 64);
- ar_hash.create (31);
-
for (iter = get_insns (); iter ; iter = NEXT_INSN (iter))
if (INSN_P (iter))
{
if (nothrow)
continue;
if (region)
- this_action = collect_one_action_chain (ar_hash, region);
+ this_action = collect_one_action_chain (&ar_hash, region);
else
this_action = -1;
note = emit_note_before (NOTE_INSN_EH_REGION_BEG,
first_no_action_insn_before_switch);
NOTE_EH_HANDLER (note) = call_site;
- note = emit_note_after (NOTE_INSN_EH_REGION_END,
- last_no_action_insn_before_switch);
+ note
+ = emit_note_eh_region_end (last_no_action_insn_before_switch);
NOTE_EH_HANDLER (note) = call_site;
gcc_assert (last_action != -3
|| (last_action_insn
== last_no_action_insn_before_switch));
- first_no_action_insn_before_switch = NULL_RTX;
- last_no_action_insn_before_switch = NULL_RTX;
+ first_no_action_insn_before_switch = NULL;
+ last_no_action_insn_before_switch = NULL;
call_site_base++;
}
/* If we'd not seen a previous action (-3) or the previous
note = emit_note_before (NOTE_INSN_EH_REGION_BEG,
first_no_action_insn);
NOTE_EH_HANDLER (note) = call_site;
- first_no_action_insn = NULL_RTX;
+ first_no_action_insn = NULL;
}
- note = emit_note_after (NOTE_INSN_EH_REGION_END,
- last_action_insn);
+ note = emit_note_eh_region_end (last_action_insn);
NOTE_EH_HANDLER (note) = call_site;
}
{
first_no_action_insn_before_switch = first_no_action_insn;
last_no_action_insn_before_switch = last_action_insn;
- first_no_action_insn = NULL_RTX;
+ first_no_action_insn = NULL;
gcc_assert (last_action == -1);
last_action = -3;
}
if (last_action >= -1 && ! first_no_action_insn)
{
- note = emit_note_after (NOTE_INSN_EH_REGION_END, last_action_insn);
+ note = emit_note_eh_region_end (last_action_insn);
NOTE_EH_HANDLER (note) = call_site;
}
call_site_base = saved_call_site_base;
- ar_hash.dispose ();
return 0;
}
-static bool
-gate_convert_to_eh_region_ranges (void)
-{
- /* Nothing to do for SJLJ exceptions or if no regions created. */
- if (cfun->eh->region_tree == NULL)
- return false;
- if (targetm_common.except_unwind_info (&global_options) == UI_SJLJ)
- return false;
- return true;
-}
-
namespace {
const pass_data pass_data_convert_to_eh_region_ranges =
RTL_PASS, /* type */
"eh_ranges", /* name */
OPTGROUP_NONE, /* optinfo_flags */
- true, /* has_gate */
- true, /* has_execute */
TV_NONE, /* tv_id */
0, /* properties_required */
0, /* properties_provided */
{}
/* opt_pass methods: */
- bool gate () { return gate_convert_to_eh_region_ranges (); }
- unsigned int execute () { return convert_to_eh_region_ranges (); }
+ virtual bool gate (function *);
+ virtual unsigned int execute (function *)
+ {
+ return convert_to_eh_region_ranges ();
+ }
}; // class pass_convert_to_eh_region_ranges
+bool
+pass_convert_to_eh_region_ranges::gate (function *)
+{
+ /* Nothing to do for SJLJ exceptions or if no regions created. */
+ if (cfun->eh->region_tree == NULL)
+ return false;
+ if (targetm_common.except_unwind_info (&global_options) == UI_SJLJ)
+ return false;
+ return true;
+}
+
} // anon namespace
rtl_opt_pass *
#ifdef HAVE_LD_EH_GC_SECTIONS
if (flag_function_sections
- || (DECL_ONE_ONLY (current_function_decl) && HAVE_COMDAT_GROUP))
+ || (DECL_COMDAT_GROUP (current_function_decl) && HAVE_COMDAT_GROUP))
{
char *section_name = XNEWVEC (char, strlen (fnname) + 32);
/* The EH table must match the code section, so only mark
it linkonce if we have COMDAT groups to tie them together. */
- if (DECL_ONE_ONLY (current_function_decl) && HAVE_COMDAT_GROUP)
+ if (DECL_COMDAT_GROUP (current_function_decl) && HAVE_COMDAT_GROUP)
flags |= SECTION_LINKONCE;
sprintf (section_name, ".gcc_except_table.%s", fnname);
s = get_section (section_name, flags, current_function_decl);
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