1 /* Routines for saving various data types to a file stream. This deals
2 with various data types like strings, integers, enums, etc.
4 Copyright (C) 2011-2014 Free Software Foundation, Inc.
5 Contributed by Diego Novillo <dnovillo@google.com>
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
25 #include "coretypes.h"
33 #include "hard-reg-set.h"
36 #include "basic-block.h"
37 #include "tree-ssa-alias.h"
38 #include "internal-fn.h"
39 #include "gimple-expr.h"
43 #include "plugin-api.h"
46 #include "data-streamer.h"
49 /* Adds a new block to output stream OBS. */
52 lto_append_block (struct lto_output_stream
*obs
)
54 struct lto_char_ptr_base
*new_block
;
56 gcc_assert (obs
->left_in_block
== 0);
58 if (obs
->first_block
== NULL
)
60 /* This is the first time the stream has been written
62 obs
->block_size
= 1024;
63 new_block
= (struct lto_char_ptr_base
*) xmalloc (obs
->block_size
);
64 obs
->first_block
= new_block
;
68 struct lto_char_ptr_base
*tptr
;
69 /* Get a new block that is twice as big as the last block
70 and link it into the list. */
72 new_block
= (struct lto_char_ptr_base
*) xmalloc (obs
->block_size
);
73 /* The first bytes of the block are reserved as a pointer to
74 the next block. Set the chain of the full block to the
75 pointer to the new block. */
76 tptr
= obs
->current_block
;
77 tptr
->ptr
= (char *) new_block
;
80 /* Set the place for the next char at the first position after the
81 chain to the next block. */
83 = ((char *) new_block
) + sizeof (struct lto_char_ptr_base
);
84 obs
->current_block
= new_block
;
85 /* Null out the newly allocated block's pointer to the next block. */
86 new_block
->ptr
= NULL
;
87 obs
->left_in_block
= obs
->block_size
- sizeof (struct lto_char_ptr_base
);
91 /* Return index used to reference STRING of LEN characters in the string table
92 in OB. The string might or might not include a trailing '\0'.
93 Then put the index onto the INDEX_STREAM.
94 When PERSISTENT is set, the string S is supposed to not change during
95 duration of the OB and thus OB can keep pointer into it. */
98 streamer_string_index (struct output_block
*ob
, const char *s
, unsigned int len
,
101 struct string_slot
**slot
;
102 struct string_slot s_slot
;
108 slot
= ob
->string_hash_table
->find_slot (&s_slot
, INSERT
);
111 struct lto_output_stream
*string_stream
= ob
->string_stream
;
112 unsigned int start
= string_stream
->total_size
;
113 struct string_slot
*new_slot
= XOBNEW (&ob
->obstack
, struct string_slot
);
119 string
= tmp
= XOBNEWVEC (&ob
->obstack
, char, len
);
120 memcpy (tmp
, s
, len
);
125 new_slot
->s
= string
;
127 new_slot
->slot_num
= start
;
129 streamer_write_uhwi_stream (string_stream
, len
);
130 streamer_write_data_stream (string_stream
, string
, len
);
135 struct string_slot
*old_slot
= *slot
;
136 return old_slot
->slot_num
+ 1;
141 /* Output STRING of LEN characters to the string table in OB. The
142 string might or might not include a trailing '\0'. Then put the
143 index onto the INDEX_STREAM.
144 When PERSISTENT is set, the string S is supposed to not change during
145 duration of the OB and thus OB can keep pointer into it. */
148 streamer_write_string_with_length (struct output_block
*ob
,
149 struct lto_output_stream
*index_stream
,
150 const char *s
, unsigned int len
,
154 streamer_write_uhwi_stream (index_stream
,
155 streamer_string_index (ob
, s
, len
, persistent
));
157 streamer_write_char_stream (index_stream
, 0);
161 /* Output the '\0' terminated STRING to the string
162 table in OB. Then put the index onto the INDEX_STREAM.
163 When PERSISTENT is set, the string S is supposed to not change during
164 duration of the OB and thus OB can keep pointer into it. */
167 streamer_write_string (struct output_block
*ob
,
168 struct lto_output_stream
*index_stream
,
169 const char *string
, bool persistent
)
172 streamer_write_string_with_length (ob
, index_stream
, string
,
176 streamer_write_char_stream (index_stream
, 0);
180 /* Output STRING of LEN characters to the string table in OB. Then
181 put the index into BP.
182 When PERSISTENT is set, the string S is supposed to not change during
183 duration of the OB and thus OB can keep pointer into it. */
186 bp_pack_string_with_length (struct output_block
*ob
, struct bitpack_d
*bp
,
187 const char *s
, unsigned int len
, bool persistent
)
191 index
= streamer_string_index (ob
, s
, len
, persistent
);
192 bp_pack_var_len_unsigned (bp
, index
);
196 /* Output the '\0' terminated STRING to the string
197 table in OB. Then put the index onto the bitpack BP.
198 When PERSISTENT is set, the string S is supposed to not change during
199 duration of the OB and thus OB can keep pointer into it. */
202 bp_pack_string (struct output_block
*ob
, struct bitpack_d
*bp
,
203 const char *s
, bool persistent
)
207 index
= streamer_string_index (ob
, s
, strlen (s
) + 1, persistent
);
208 bp_pack_var_len_unsigned (bp
, index
);
213 /* Write a zero to the output stream. */
216 streamer_write_zero (struct output_block
*ob
)
218 streamer_write_char_stream (ob
->main_stream
, 0);
222 /* Write an unsigned HOST_WIDE_INT value WORK to OB->main_stream. */
225 streamer_write_uhwi (struct output_block
*ob
, unsigned HOST_WIDE_INT work
)
227 streamer_write_uhwi_stream (ob
->main_stream
, work
);
231 /* Write a HOST_WIDE_INT value WORK to OB->main_stream. */
234 streamer_write_hwi (struct output_block
*ob
, HOST_WIDE_INT work
)
236 streamer_write_hwi_stream (ob
->main_stream
, work
);
239 /* Write a gcov counter value WORK to OB->main_stream. */
242 streamer_write_gcov_count (struct output_block
*ob
, gcov_type work
)
244 streamer_write_gcov_count_stream (ob
->main_stream
, work
);
247 /* Write an unsigned HOST_WIDE_INT value WORK to OBS. */
250 streamer_write_uhwi_stream (struct lto_output_stream
*obs
,
251 unsigned HOST_WIDE_INT work
)
253 if (obs
->left_in_block
== 0)
254 lto_append_block (obs
);
255 char *current_pointer
= obs
->current_pointer
;
256 unsigned int left_in_block
= obs
->left_in_block
;
257 unsigned int size
= 0;
260 unsigned int byte
= (work
& 0x7f);
263 /* More bytes to follow. */
266 *(current_pointer
++) = byte
;
270 while (work
!= 0 && left_in_block
> 0);
273 obs
->left_in_block
= 0;
274 lto_append_block (obs
);
275 current_pointer
= obs
->current_pointer
;
276 left_in_block
= obs
->left_in_block
;
279 unsigned int byte
= (work
& 0x7f);
282 /* More bytes to follow. */
285 *(current_pointer
++) = byte
;
291 obs
->current_pointer
= current_pointer
;
292 obs
->left_in_block
= left_in_block
;
293 obs
->total_size
+= size
;
297 /* Write a HOST_WIDE_INT value WORK to OBS. */
300 streamer_write_hwi_stream (struct lto_output_stream
*obs
, HOST_WIDE_INT work
)
302 if (obs
->left_in_block
== 0)
303 lto_append_block (obs
);
304 char *current_pointer
= obs
->current_pointer
;
305 unsigned int left_in_block
= obs
->left_in_block
;
306 unsigned int size
= 0;
310 unsigned int byte
= (work
& 0x7f);
311 /* If the lower 7-bits are sign-extended 0 or -1 we are finished. */
313 more
= !(work
== 0 || work
== -1);
316 /* More bits to follow. */
321 *(current_pointer
++) = byte
;
325 while (more
&& left_in_block
> 0);
328 obs
->left_in_block
= 0;
329 lto_append_block (obs
);
330 current_pointer
= obs
->current_pointer
;
331 left_in_block
= obs
->left_in_block
;
334 unsigned int byte
= (work
& 0x7f);
336 more
= !(work
== 0 || work
== -1);
343 *(current_pointer
++) = byte
;
349 obs
->current_pointer
= current_pointer
;
350 obs
->left_in_block
= left_in_block
;
351 obs
->total_size
+= size
;
354 /* Write a GCOV counter value WORK to OBS. */
357 streamer_write_gcov_count_stream (struct lto_output_stream
*obs
, gcov_type work
)
359 gcc_assert (work
>= 0);
360 gcc_assert ((HOST_WIDE_INT
) work
== work
);
361 streamer_write_hwi_stream (obs
, work
);
364 /* Write raw DATA of length LEN to the output block OB. */
367 streamer_write_data_stream (struct lto_output_stream
*obs
, const void *data
,
375 if (obs
->left_in_block
== 0)
376 lto_append_block (obs
);
378 /* Determine how many bytes to copy in this loop. */
379 if (len
<= obs
->left_in_block
)
382 copy
= obs
->left_in_block
;
384 /* Copy the data and do bookkeeping. */
385 memcpy (obs
->current_pointer
, data
, copy
);
386 obs
->current_pointer
+= copy
;
387 obs
->total_size
+= copy
;
388 obs
->left_in_block
-= copy
;
389 data
= (const char *) data
+ copy
;