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2004-02-29  Paolo Bonzini  <bonzini@gnu.org>

	* posix/regexec.c (transit_state): Don't handle state == NULL.
	Move state log and backreference management...
	(merge_state_with_log): ... to this function.
	(find_recover_state): New function.
	(check_matching): Use find_recover_state to get a non-NULL
	state when an invalid state is reached.  Compute the amount
	of initial characters to be skipped less conservatively when
	multi-byte character sets are in use.  Do not check
	dfa->nbackref if the state log is NULL.  Initialize err.
	(acquire_init_state_context): Expect err to be initialized.
	Fix spacing.

2004-03-05  Jakub Jelinek  <jakub@redhat.com>

	* sysdeps/sparc/sparc32/elf/start.S: Handle PIEs.
	* sysdeps/sparc/sparc64/elf/start.S: Likewise.
This commit is contained in:
Ulrich Drepper 2004-03-04 23:28:06 +00:00
parent f2fcb018ad
commit 4c595adb60
4 changed files with 218 additions and 140 deletions
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19
ChangeLog
View File

@ -1,3 +1,22 @@
2004-02-29 Paolo Bonzini <bonzini@gnu.org>
* posix/regexec.c (transit_state): Don't handle state == NULL.
Move state log and backreference management...
(merge_state_with_log): ... to this function.
(find_recover_state): New function.
(check_matching): Use find_recover_state to get a non-NULL
state when an invalid state is reached. Compute the amount
of initial characters to be skipped less conservatively when
multi-byte character sets are in use. Do not check
dfa->nbackref if the state log is NULL. Initialize err.
(acquire_init_state_context): Expect err to be initialized.
Fix spacing.
2004-03-05 Jakub Jelinek <jakub@redhat.com>
* sysdeps/sparc/sparc32/elf/start.S: Handle PIEs.
* sysdeps/sparc/sparc64/elf/start.S: Likewise.
2004-03-04 Jakub Jelinek <jakub@redhat.com>
* iconv/iconv_prog.c (process_block): Handle omit_invalid.

303
posix/regexec.c
View File

@ -123,9 +123,14 @@ static reg_errcode_t clean_state_log_if_needed (re_match_context_t *mctx,
int next_state_log_idx) internal_function;
static reg_errcode_t merge_state_array (re_dfa_t *dfa, re_dfastate_t **dst,
re_dfastate_t **src, int num) internal_function;
static re_dfastate_t *find_recover_state (reg_errcode_t *err,
re_match_context_t *mctx) internal_function;
static re_dfastate_t *transit_state (reg_errcode_t *err,
re_match_context_t *mctx,
re_dfastate_t *state) internal_function;
static re_dfastate_t *merge_state_with_log (reg_errcode_t *err,
re_match_context_t *mctx,
re_dfastate_t *next_state) internal_function;
static reg_errcode_t check_subexp_matching_top (re_match_context_t *mctx,
re_node_set *cur_nodes,
int str_idx) internal_function;
@ -936,7 +941,6 @@ acquire_init_state_context (err, mctx, idx)
int idx;
{
re_dfa_t *const dfa = mctx->dfa;
*err = REG_NOERROR;
if (dfa->init_state->has_constraint)
{
unsigned int context;
@ -952,9 +956,9 @@ acquire_init_state_context (err, mctx, idx)
else if (IS_BEGBUF_CONTEXT (context))
{
/* It is relatively rare case, then calculate on demand. */
return re_acquire_state_context (err, dfa,
dfa->init_state->entrance_nodes,
context);
return re_acquire_state_context (err, dfa,
dfa->init_state->entrance_nodes,
context);
}
else
/* Must not happen? */
@ -985,29 +989,37 @@ check_matching (mctx, fl_longest_match, p_match_first)
int match_last = -1;
int cur_str_idx = re_string_cur_idx (&mctx->input);
re_dfastate_t *cur_state;
int at_init_state = p_match_first != NULL, skipped = 0;
int at_init_state = p_match_first != NULL;
int next_start_idx = cur_str_idx;
err = REG_NOERROR;
cur_state = acquire_init_state_context (&err, mctx, cur_str_idx);
/* An initial state must not be NULL(invalid state). */
/* An initial state must not be NULL (invalid). */
if (BE (cur_state == NULL, 0))
return -2;
if (mctx->state_log != NULL)
mctx->state_log[cur_str_idx] = cur_state;
/* Check OP_OPEN_SUBEXP in the initial state in case that we use them
later. E.g. Processing back references. */
if (BE (dfa->nbackref, 0))
{
at_init_state = 0;
err = check_subexp_matching_top (mctx, &cur_state->nodes, 0);
if (BE (err != REG_NOERROR, 0))
return err;
assert (err == REG_ESPACE);
return -2;
}
if (cur_state->has_backref)
if (mctx->state_log != NULL)
{
mctx->state_log[cur_str_idx] = cur_state;
/* Check OP_OPEN_SUBEXP in the initial state in case that we use them
later. E.g. Processing back references. */
if (BE (dfa->nbackref, 0))
{
err = transit_state_bkref (mctx, &cur_state->nodes);
at_init_state = 0;
err = check_subexp_matching_top (mctx, &cur_state->nodes, 0);
if (BE (err != REG_NOERROR, 0))
return err;
if (cur_state->has_backref)
{
err = transit_state_bkref (mctx, &cur_state->nodes);
if (BE (err != REG_NOERROR, 0))
return err;
}
}
}
@ -1031,40 +1043,34 @@ check_matching (mctx, fl_longest_match, p_match_first)
{
re_dfastate_t *old_state = cur_state;
cur_state = transit_state (&err, mctx, cur_state);
if (mctx->state_log != NULL)
cur_state = merge_state_with_log (&err, mctx, cur_state);
if (cur_state == NULL)
{
/* Reached the invalid state or an error. Try to recover a valid
state using the state log, if available and if we have not
already found a valid (even if not the longest) match. */
if (BE (err != REG_NOERROR, 0))
return -2;
if (mctx->state_log == NULL
|| (match && !fl_longest_match)
|| (cur_state = find_recover_state (&err, mctx)) == NULL)
break;
}
if (at_init_state)
{
if (old_state == cur_state)
skipped++;
next_start_idx = re_string_cur_idx (&mctx->input);
else
at_init_state = 0;
}
if (cur_state == NULL) /* Reached at the invalid state or an error. */
if (cur_state->halt)
{
cur_str_idx = re_string_cur_idx (&mctx->input);
if (BE (err != REG_NOERROR, 0))
return -2;
if (!fl_longest_match && match)
break;
else
{
if (mctx->state_log == NULL)
break;
else
{
int max = mctx->state_log_top;
for (; cur_str_idx <= max; ++cur_str_idx)
if (mctx->state_log[cur_str_idx] != NULL)
break;
if (cur_str_idx > max)
break;
}
}
}
if (cur_state != NULL && cur_state->halt)
{
/* Reached at a halt state.
/* Reached a halt state.
Check the halt state can satisfy the current context. */
if (!cur_state->has_constraint
|| check_halt_state_context (mctx, cur_state,
@ -1079,8 +1085,8 @@ check_matching (mctx, fl_longest_match, p_match_first)
}
}
if (match_last == -1 && skipped)
*p_match_first += skipped;
if (match_last == -1 && p_match_first)
*p_match_first += next_start_idx;
return match_last;
}
@ -2134,7 +2140,6 @@ transit_state (err, mctx, state)
re_dfa_t *const dfa = mctx->dfa;
re_dfastate_t **trtable, *next_state;
unsigned char ch;
int cur_idx;
if (re_string_cur_idx (&mctx->input) + 1 >= mctx->input.bufs_len
|| (re_string_cur_idx (&mctx->input) + 1 >= mctx->input.valid_len
@ -2145,14 +2150,6 @@ transit_state (err, mctx, state)
return NULL;
}
*err = REG_NOERROR;
if (state == NULL)
{
next_state = state;
re_string_skip_bytes (&mctx->input, 1);
}
else
{
#ifdef RE_ENABLE_I18N
/* If the current state can accept multibyte. */
if (state->accept_mb)
@ -2163,95 +2160,96 @@ transit_state (err, mctx, state)
}
#endif /* RE_ENABLE_I18N */
/* Then decide the next state with the single byte. */
if (1)
{
/* Use transition table */
ch = re_string_fetch_byte (&mctx->input);
trtable = state->trtable;
if (trtable == NULL)
{
trtable = build_trtable (dfa, state);
if (trtable == NULL)
{
*err = REG_ESPACE;
return NULL;
}
}
if (BE (state->word_trtable, 0))
{
unsigned int context;
context
= re_string_context_at (&mctx->input,
re_string_cur_idx (&mctx->input) - 1,
mctx->eflags);
if (IS_WORD_CONTEXT (context))
next_state = trtable[ch + SBC_MAX];
else
next_state = trtable[ch];
}
else
next_state = trtable[ch];
}
#if 0
else
{
/* don't use transition table */
next_state = transit_state_sb (err, mctx, state);
if (BE (next_state == NULL && *err != REG_NOERROR, 0))
return NULL;
}
#endif
}
cur_idx = re_string_cur_idx (&mctx->input);
/* Update the state_log if we need. */
if (mctx->state_log != NULL)
/* Then decide the next state with the single byte. */
if (1)
{
if (cur_idx > mctx->state_log_top)
{
mctx->state_log[cur_idx] = next_state;
mctx->state_log_top = cur_idx;
/* Use transition table */
ch = re_string_fetch_byte (&mctx->input);
trtable = state->trtable;
if (trtable == NULL)
{
trtable = build_trtable (dfa, state);
if (trtable == NULL)
{
*err = REG_ESPACE;
return NULL;
}
}
else if (mctx->state_log[cur_idx] == 0)
{
mctx->state_log[cur_idx] = next_state;
if (BE (state->word_trtable, 0))
{
unsigned int context;
context
= re_string_context_at (&mctx->input,
re_string_cur_idx (&mctx->input) - 1,
mctx->eflags);
if (IS_WORD_CONTEXT (context))
return trtable[ch + SBC_MAX];
else
return trtable[ch];
}
else
{
re_dfastate_t *pstate;
unsigned int context;
re_node_set next_nodes, *log_nodes, *table_nodes = NULL;
/* If (state_log[cur_idx] != 0), it implies that cur_idx is
the destination of a multibyte char/collating element/
back reference. Then the next state is the union set of
these destinations and the results of the transition table. */
pstate = mctx->state_log[cur_idx];
log_nodes = pstate->entrance_nodes;
if (next_state != NULL)
{
table_nodes = next_state->entrance_nodes;
*err = re_node_set_init_union (&next_nodes, table_nodes,
return trtable[ch];
}
#if 0
else
/* don't use transition table */
return transit_state_sb (err, mctx, state);
#endif
}
/* Update the state_log if we need */
re_dfastate_t *
merge_state_with_log (err, mctx, next_state)
reg_errcode_t *err;
re_match_context_t *mctx;
re_dfastate_t *next_state;
{
re_dfa_t *const dfa = mctx->dfa;
int cur_idx = re_string_cur_idx (&mctx->input);
if (cur_idx > mctx->state_log_top)
{
mctx->state_log[cur_idx] = next_state;
mctx->state_log_top = cur_idx;
}
else if (mctx->state_log[cur_idx] == 0)
{
mctx->state_log[cur_idx] = next_state;
}
else
{
re_dfastate_t *pstate;
unsigned int context;
re_node_set next_nodes, *log_nodes, *table_nodes = NULL;
/* If (state_log[cur_idx] != 0), it implies that cur_idx is
the destination of a multibyte char/collating element/
back reference. Then the next state is the union set of
these destinations and the results of the transition table. */
pstate = mctx->state_log[cur_idx];
log_nodes = pstate->entrance_nodes;
if (next_state != NULL)
{
table_nodes = next_state->entrance_nodes;
*err = re_node_set_init_union (&next_nodes, table_nodes,
log_nodes);
if (BE (*err != REG_NOERROR, 0))
return NULL;
}
else
next_nodes = *log_nodes;
/* Note: We already add the nodes of the initial state,
then we don't need to add them here. */
if (BE (*err != REG_NOERROR, 0))
return NULL;
}
else
next_nodes = *log_nodes;
/* Note: We already add the nodes of the initial state,
then we don't need to add them here. */
context = re_string_context_at (&mctx->input,
re_string_cur_idx (&mctx->input) - 1,
mctx->eflags);
next_state = mctx->state_log[cur_idx]
= re_acquire_state_context (err, dfa, &next_nodes, context);
/* We don't need to check errors here, since the return value of
this function is next_state and ERR is already set. */
context = re_string_context_at (&mctx->input,
re_string_cur_idx (&mctx->input) - 1,
mctx->eflags);
next_state = mctx->state_log[cur_idx]
= re_acquire_state_context (err, dfa, &next_nodes, context);
/* We don't need to check errors here, since the return value of
this function is next_state and ERR is already set. */
if (table_nodes != NULL)
re_node_set_free (&next_nodes);
}
if (table_nodes != NULL)
re_node_set_free (&next_nodes);
}
if (BE (dfa->nbackref, 0) && next_state != NULL)
@ -2273,9 +2271,38 @@ transit_state (err, mctx, state)
next_state = mctx->state_log[cur_idx];
}
}
return next_state;
}
/* Skip bytes in the input that correspond to part of a
multi-byte match, then look in the log for a state
from which to restart matching. */
re_dfastate_t *
find_recover_state (err, mctx)
reg_errcode_t *err;
re_match_context_t *mctx;
{
re_dfastate_t *cur_state = NULL;
do
{
int max = mctx->state_log_top;
int cur_str_idx = re_string_cur_idx (&mctx->input);
do
{
if (++cur_str_idx > max)
return NULL;
re_string_skip_bytes (&mctx->input, 1);
}
while (mctx->state_log[cur_str_idx] == NULL);
cur_state = merge_state_with_log (err, mctx, NULL);
}
while (err == REG_NOERROR && cur_state == NULL);
return cur_state;
}
/* Helper functions for transit_state. */
/* From the node set CUR_NODES, pick up the nodes whose types are

18
sysdeps/sparc/sparc32/elf/start.S
View File

@ -1,5 +1,5 @@
/* Startup code for elf32-sparc
Copyright (C) 1997, 1998, 2002 Free Software Foundation, Inc.
Copyright (C) 1997, 1998, 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
@ -23,10 +23,21 @@
.section ".text"
.align 4
#ifdef SHARED
.LLGETPC0:
retl
add %o7, %l7, %l7
#endif
.global _start
.type _start,#function
_start:
#ifdef SHARED
sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7
call .LLGETPC0
add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7
#endif
/* Terminate the stack frame, and reserve space for functions to
drop their arguments. */
mov %g0, %fp
@ -44,6 +55,11 @@ _start:
or %o0, %lo(main), %o0
or %o3, %lo(__libc_csu_init), %o3
or %o4, %lo(__libc_csu_fini), %o4
#ifdef SHARED
ld [%l7 + %o0], %o0
ld [%l7 + %o3], %o3
ld [%l7 + %o4], %o4
#endif
/* When starting a binary via the dynamic linker, %g1 contains the
address of the shared library termination function, which will be

18
sysdeps/sparc/sparc64/elf/start.S
View File

@ -1,5 +1,5 @@
/* Startup code for elf64-sparc
Copyright (C) 1997, 1998, 2002 Free Software Foundation, Inc.
Copyright (C) 1997, 1998, 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
@ -23,10 +23,21 @@
.section ".text"
.align 4
#ifdef SHARED
.LLGETPC0:
retl
add %o7, %l7, %l7
#endif
.global _start
.type _start,#function
_start:
#ifdef SHARED
sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7
call .LLGETPC0
add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7
#endif
/* Terminate the stack frame, and reserve space for functions to
drop their arguments. */
mov %g0, %fp
@ -45,6 +56,11 @@ _start:
or %o0, %lo(main), %o0
or %o3, %lo(__libc_csu_init), %o3
or %o4, %lo(__libc_csu_fini), %o4
#ifdef SHARED
ldx [%l7 + %o0], %o0
ldx [%l7 + %o3], %o3
ldx [%l7 + %o4], %o4
#endif
/* When starting a binary via the dynamic linker, %g1 contains the
address of the shared library termination function, which will be