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unwind-ia64.c: Include ia64intrin.h.
* config/ia64/unwind-ia64.c: Include ia64intrin.h.
(atomic_alloc, atomic_free): New.
(SIZE, MASK_FOR, PTR_IN): New.
(emergency_reg_state, emergency_reg_state_free): New.
(emergency_labeled_state, emergency_labeled_state_free): New.
(reg_state_alloced, labeled_state_alloced): New.
(alloc_reg_state, free_reg_state): New.
(alloc_label_state, free_label_state, free_label_states): New.
(push, pop, dup_state_stack, free_state_stack): Use them.
(desc_label_state): Likewise.
(uw_frame_state_for): Free label states and state stack.
(uw_update_reg_address): Eliminate warnings.
From-SVN: r51722
This commit is contained in:
Richard Henderson
Richard Henderson
parent
84d760747e
commit
72e3287637
@ -1,3 +1,18 @@
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2002-04-01 Richard Henderson <rth@redhat.com>
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* config/ia64/unwind-ia64.c: Include ia64intrin.h.
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(atomic_alloc, atomic_free): New.
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(SIZE, MASK_FOR, PTR_IN): New.
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(emergency_reg_state, emergency_reg_state_free): New.
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(emergency_labeled_state, emergency_labeled_state_free): New.
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(reg_state_alloced, labeled_state_alloced): New.
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(alloc_reg_state, free_reg_state): New.
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(alloc_label_state, free_label_state, free_label_states): New.
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(push, pop, dup_state_stack, free_state_stack): Use them.
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(desc_label_state): Likewise.
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(uw_frame_state_for): Free label states and state stack.
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(uw_update_reg_address): Eliminate warnings.
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2002-04-01 Vladimir Makarov <vmakarov@redhat.com>
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* config/pa/pa-pro-end.h (ASM_OUTPUT_ALIGNED_COMMON,
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@ -35,6 +35,10 @@
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#include "tsystem.h"
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#include "unwind.h"
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#include "unwind-ia64.h"
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#include "ia64intrin.h"
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/* This isn't thread safe, but nice for occasional tests. */
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#undef ENABLE_MALLOC_CHECKING
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#ifndef __USING_SJLJ_EXCEPTIONS__
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#define UNW_VER(x) ((x) >> 48)
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@ -237,14 +241,128 @@ static unsigned char const save_order[] =
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#define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
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/* MASK is a bitmap describing the allocation state of emergency buffers,
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with bit set indicating free. Return >= 0 if allocation is successful;
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< 0 if failure. */
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static inline int
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atomic_alloc (unsigned int *mask)
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{
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unsigned int old = *mask, ret, new;
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while (1)
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{
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if (old == 0)
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return -1;
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ret = old & -old;
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new = old & ~ret;
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new = __sync_val_compare_and_swap (mask, old, new);
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if (old == new)
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break;
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old = new;
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}
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return __builtin_ffs (ret) - 1;
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}
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/* Similarly, free an emergency buffer. */
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static inline void
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atomic_free (unsigned int *mask, int bit)
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{
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__sync_xor_and_fetch (mask, 1 << bit);
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}
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#define SIZE(X) (sizeof(X) / sizeof(*(X)))
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#define MASK_FOR(X) ((2U << (SIZE (X) - 1)) - 1)
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#define PTR_IN(X, P) ((P) >= (X) && (P) < (X) + SIZE (X))
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static struct unw_reg_state emergency_reg_state[32];
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static int emergency_reg_state_free = MASK_FOR (emergency_reg_state);
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static struct unw_labeled_state emergency_labeled_state[8];
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static int emergency_labeled_state_free = MASK_FOR (emergency_labeled_state);
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#ifdef ENABLE_MALLOC_CHECKING
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static int reg_state_alloced;
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static int labeled_state_alloced;
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#endif
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/* Allocation and deallocation of structures. */
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static struct unw_reg_state *
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alloc_reg_state (void)
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{
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struct unw_reg_state *rs;
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#ifdef ENABLE_MALLOC_CHECKING
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reg_state_alloced++;
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#endif
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rs = malloc (sizeof (struct unw_reg_state));
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if (!rs)
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{
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int n = atomic_alloc (&emergency_reg_state_free);
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if (n >= 0)
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rs = &emergency_reg_state[n];
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}
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return rs;
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}
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static void
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free_reg_state (struct unw_reg_state *rs)
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{
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#ifdef ENABLE_MALLOC_CHECKING
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reg_state_alloced--;
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#endif
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if (PTR_IN (emergency_reg_state, rs))
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atomic_free (&emergency_reg_state_free, rs - emergency_reg_state);
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else
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free (rs);
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}
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static struct unw_labeled_state *
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alloc_label_state (void)
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{
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struct unw_labeled_state *ls;
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#ifdef ENABLE_MALLOC_CHECKING
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labeled_state_alloced++;
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#endif
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ls = malloc(sizeof(struct unw_labeled_state));
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if (!ls)
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{
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int n = atomic_alloc (&emergency_labeled_state_free);
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if (n >= 0)
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ls = &emergency_labeled_state[n];
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}
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return ls;
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}
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static void
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free_label_state (struct unw_labeled_state *ls)
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{
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#ifdef ENABLE_MALLOC_CHECKING
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labeled_state_alloced--;
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#endif
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if (PTR_IN (emergency_labeled_state, ls))
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atomic_free (&emergency_labeled_state_free, emergency_labeled_state - ls);
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else
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free (ls);
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}
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/* Routines to manipulate the state stack. */
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static void
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push (struct unw_state_record *sr)
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{
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struct unw_reg_state *rs;
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rs = malloc (sizeof (struct unw_reg_state));
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struct unw_reg_state *rs = alloc_reg_state ();
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memcpy (rs, &sr->curr, sizeof (*rs));
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sr->curr.next = rs;
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}
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@ -255,12 +373,13 @@ pop (struct unw_state_record *sr)
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struct unw_reg_state *rs = sr->curr.next;
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if (!rs)
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abort();
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memcpy(&sr->curr, rs, sizeof(*rs));
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free (rs);
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abort ();
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memcpy (&sr->curr, rs, sizeof(*rs));
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free_reg_state (rs);
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}
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/* Make a copy of the state stack. Non-recursive to avoid stack overflows. */
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static struct unw_reg_state *
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dup_state_stack (struct unw_reg_state *rs)
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{
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@ -268,8 +387,8 @@ dup_state_stack (struct unw_reg_state *rs)
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while (rs)
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{
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copy = malloc(sizeof(struct unw_state_record));
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memcpy(copy, rs, sizeof(*copy));
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copy = alloc_reg_state ();
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memcpy (copy, rs, sizeof(*copy));
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if (first)
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prev->next = copy;
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else
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@ -277,6 +396,7 @@ dup_state_stack (struct unw_reg_state *rs)
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rs = rs->next;
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prev = copy;
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}
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return first;
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}
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@ -289,10 +409,26 @@ free_state_stack (struct unw_reg_state *rs)
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for (p = rs->next; p != NULL; p = next)
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{
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next = p->next;
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free(p);
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free_reg_state (p);
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}
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rs->next = NULL;
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}
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/* Free all labeled states. */
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static void
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free_label_states (struct unw_labeled_state *ls)
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{
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struct unw_labeled_state *next;
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for (; ls ; ls = next)
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{
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next = ls->next;
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free_state_stack (&ls->saved_state);
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free_label_state (ls);
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}
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}
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/* Unwind decoder routines */
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@ -377,7 +513,7 @@ finish_prologue (struct unw_state_record *sr)
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/* First, resolve implicit register save locations
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(see Section "11.4.2.3 Rules for Using Unwind Descriptors", rule 3). */
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for (i = 0; i < (int) sizeof(save_order); ++i)
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for (i = 0; i < (int) sizeof (save_order); ++i)
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{
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reg = sr->curr.reg + save_order[i];
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if (reg->where == UNW_WHERE_GR_SAVE)
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@ -410,8 +546,8 @@ finish_prologue (struct unw_state_record *sr)
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mask = *cp++;
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kind = (mask >> 2*(3-(t & 3))) & 3;
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if (kind > 0)
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spill_next_when(®s[kind - 1], sr->curr.reg + limit[kind - 1],
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sr->region_start + t);
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spill_next_when (®s[kind - 1], sr->curr.reg + limit[kind - 1],
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sr->region_start + t);
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}
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}
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@ -419,12 +555,12 @@ finish_prologue (struct unw_state_record *sr)
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if (sr->any_spills)
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{
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off = sr->spill_offset;
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alloc_spill_area(&off, 16, sr->curr.reg + UNW_REG_F2,
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sr->curr.reg + UNW_REG_F31);
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alloc_spill_area(&off, 8, sr->curr.reg + UNW_REG_B1,
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sr->curr.reg + UNW_REG_B5);
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alloc_spill_area(&off, 8, sr->curr.reg + UNW_REG_R4,
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sr->curr.reg + UNW_REG_R7);
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alloc_spill_area (&off, 16, sr->curr.reg + UNW_REG_F2,
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sr->curr.reg + UNW_REG_F31);
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alloc_spill_area (&off, 8, sr->curr.reg + UNW_REG_B1,
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sr->curr.reg + UNW_REG_B5);
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alloc_spill_area (&off, 8, sr->curr.reg + UNW_REG_R4,
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sr->curr.reg + UNW_REG_R7);
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}
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}
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@ -439,7 +575,7 @@ desc_prologue (int body, unw_word rlen, unsigned char mask,
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int i;
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if (!(sr->in_body || sr->first_region))
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finish_prologue(sr);
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finish_prologue (sr);
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sr->first_region = 0;
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/* Check if we're done. */
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@ -450,12 +586,13 @@ desc_prologue (int body, unw_word rlen, unsigned char mask,
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}
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for (i = 0; i < sr->epilogue_count; ++i)
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pop(sr);
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pop (sr);
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sr->epilogue_count = 0;
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sr->epilogue_start = UNW_WHEN_NEVER;
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if (!body)
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push(sr);
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push (sr);
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sr->region_start += sr->region_len;
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sr->region_len = rlen;
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@ -685,9 +822,9 @@ desc_copy_state (unw_word label, struct unw_state_record *sr)
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{
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if (ls->label == label)
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{
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free_state_stack(&sr->curr);
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memcpy(&sr->curr, &ls->saved_state, sizeof(sr->curr));
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sr->curr.next = dup_state_stack(ls->saved_state.next);
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free_state_stack (&sr->curr);
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memcpy (&sr->curr, &ls->saved_state, sizeof (sr->curr));
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sr->curr.next = dup_state_stack (ls->saved_state.next);
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return;
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}
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}
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@ -697,14 +834,13 @@ desc_copy_state (unw_word label, struct unw_state_record *sr)
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static inline void
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desc_label_state (unw_word label, struct unw_state_record *sr)
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{
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struct unw_labeled_state *ls;
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struct unw_labeled_state *ls = alloc_label_state ();
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ls = malloc(sizeof(struct unw_labeled_state));
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ls->label = label;
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memcpy(&ls->saved_state, &sr->curr, sizeof(ls->saved_state));
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ls->saved_state.next = dup_state_stack(sr->curr.next);
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memcpy (&ls->saved_state, &sr->curr, sizeof (ls->saved_state));
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ls->saved_state.next = dup_state_stack (sr->curr.next);
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/* insert into list of labeled states: */
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/* Insert into list of labeled states. */
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ls->next = sr->labeled_states;
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sr->labeled_states = ls;
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}
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@ -1574,6 +1710,14 @@ uw_frame_state_for (struct _Unwind_Context *context, _Unwind_FrameState *fs)
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while (!fs->done && insn < insn_end)
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insn = unw_decode (insn, fs->in_body, fs);
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free_label_states (fs->labeled_states);
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free_state_stack (&fs->curr);
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#ifdef ENABLE_MALLOC_CHECKING
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if (reg_state_alloced || labeled_state_alloced)
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abort ();
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#endif
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/* If we're in the epilogue, sp has been restored and all values
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on the memory stack below psp also have been restored. */
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if (fs->when_target > fs->epilogue_start)
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@ -1634,7 +1778,7 @@ uw_update_reg_address (struct _Unwind_Context *context,
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/* Note that while RVAL can only be 1-5 from normal descriptors,
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we can want to look at B0 due to having manually unwound a
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signal frame. */
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if (rval >= 0 && rval <= 5)
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if (rval <= 5)
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addr = context->br_loc[rval];
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else
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abort ();
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@ -1733,8 +1877,7 @@ uw_update_reg_address (struct _Unwind_Context *context,
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context->psp = *(unsigned long *)addr;
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break;
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case UNW_REG_RNAT:
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case UNW_NUM_REGS:
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default:
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abort ();
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}
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}
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