1*38fd1498Szrj /* Routines required for instrumenting a program. */
2*38fd1498Szrj /* Compile this one with gcc. */
3*38fd1498Szrj /* Copyright (C) 1989-2018 Free Software Foundation, Inc.
4*38fd1498Szrj
5*38fd1498Szrj This file is part of GCC.
6*38fd1498Szrj
7*38fd1498Szrj GCC is free software; you can redistribute it and/or modify it under
8*38fd1498Szrj the terms of the GNU General Public License as published by the Free
9*38fd1498Szrj Software Foundation; either version 3, or (at your option) any later
10*38fd1498Szrj version.
11*38fd1498Szrj
12*38fd1498Szrj GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13*38fd1498Szrj WARRANTY; without even the implied warranty of MERCHANTABILITY or
14*38fd1498Szrj FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15*38fd1498Szrj for more details.
16*38fd1498Szrj
17*38fd1498Szrj Under Section 7 of GPL version 3, you are granted additional
18*38fd1498Szrj permissions described in the GCC Runtime Library Exception, version
19*38fd1498Szrj 3.1, as published by the Free Software Foundation.
20*38fd1498Szrj
21*38fd1498Szrj You should have received a copy of the GNU General Public License and
22*38fd1498Szrj a copy of the GCC Runtime Library Exception along with this program;
23*38fd1498Szrj see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
24*38fd1498Szrj <http://www.gnu.org/licenses/>. */
25*38fd1498Szrj
26*38fd1498Szrj #include "libgcov.h"
27*38fd1498Szrj
28*38fd1498Szrj #if defined(inhibit_libc)
29*38fd1498Szrj /* If libc and its header files are not available, provide dummy functions. */
30*38fd1498Szrj
31*38fd1498Szrj #if defined(L_gcov)
__gcov_init(struct gcov_info * p)32*38fd1498Szrj void __gcov_init (struct gcov_info *p __attribute__ ((unused))) {}
33*38fd1498Szrj #endif
34*38fd1498Szrj
35*38fd1498Szrj #else /* inhibit_libc */
36*38fd1498Szrj
37*38fd1498Szrj #include <string.h>
38*38fd1498Szrj #if GCOV_LOCKED
39*38fd1498Szrj #include <fcntl.h>
40*38fd1498Szrj #include <errno.h>
41*38fd1498Szrj #include <sys/stat.h>
42*38fd1498Szrj #endif
43*38fd1498Szrj
44*38fd1498Szrj #ifdef L_gcov
45*38fd1498Szrj
46*38fd1498Szrj /* A utility function for outputting errors. */
47*38fd1498Szrj static int gcov_error (const char *, ...);
48*38fd1498Szrj
49*38fd1498Szrj #if !IN_GCOV_TOOL
50*38fd1498Szrj static void gcov_error_exit (void);
51*38fd1498Szrj #endif
52*38fd1498Szrj
53*38fd1498Szrj #include "gcov-io.c"
54*38fd1498Szrj
55*38fd1498Szrj struct gcov_fn_buffer
56*38fd1498Szrj {
57*38fd1498Szrj struct gcov_fn_buffer *next;
58*38fd1498Szrj unsigned fn_ix;
59*38fd1498Szrj struct gcov_fn_info info;
60*38fd1498Szrj /* note gcov_fn_info ends in a trailing array. */
61*38fd1498Szrj };
62*38fd1498Szrj
63*38fd1498Szrj struct gcov_summary_buffer
64*38fd1498Szrj {
65*38fd1498Szrj struct gcov_summary_buffer *next;
66*38fd1498Szrj struct gcov_summary summary;
67*38fd1498Szrj };
68*38fd1498Szrj
69*38fd1498Szrj /* A struct that bundles all the related information about the
70*38fd1498Szrj gcda filename. */
71*38fd1498Szrj
72*38fd1498Szrj struct gcov_filename
73*38fd1498Szrj {
74*38fd1498Szrj char *filename; /* filename buffer */
75*38fd1498Szrj size_t max_length; /* maximum filename length */
76*38fd1498Szrj int strip; /* leading chars to strip from filename */
77*38fd1498Szrj size_t prefix; /* chars to prepend to filename */
78*38fd1498Szrj };
79*38fd1498Szrj
80*38fd1498Szrj static struct gcov_fn_buffer *
free_fn_data(const struct gcov_info * gi_ptr,struct gcov_fn_buffer * buffer,unsigned limit)81*38fd1498Szrj free_fn_data (const struct gcov_info *gi_ptr, struct gcov_fn_buffer *buffer,
82*38fd1498Szrj unsigned limit)
83*38fd1498Szrj {
84*38fd1498Szrj struct gcov_fn_buffer *next;
85*38fd1498Szrj unsigned ix, n_ctr = 0;
86*38fd1498Szrj
87*38fd1498Szrj if (!buffer)
88*38fd1498Szrj return 0;
89*38fd1498Szrj next = buffer->next;
90*38fd1498Szrj
91*38fd1498Szrj for (ix = 0; ix != limit; ix++)
92*38fd1498Szrj if (gi_ptr->merge[ix])
93*38fd1498Szrj free (buffer->info.ctrs[n_ctr++].values);
94*38fd1498Szrj free (buffer);
95*38fd1498Szrj return next;
96*38fd1498Szrj }
97*38fd1498Szrj
98*38fd1498Szrj static struct gcov_fn_buffer **
buffer_fn_data(const char * filename,const struct gcov_info * gi_ptr,struct gcov_fn_buffer ** end_ptr,unsigned fn_ix)99*38fd1498Szrj buffer_fn_data (const char *filename, const struct gcov_info *gi_ptr,
100*38fd1498Szrj struct gcov_fn_buffer **end_ptr, unsigned fn_ix)
101*38fd1498Szrj {
102*38fd1498Szrj unsigned n_ctrs = 0, ix = 0;
103*38fd1498Szrj struct gcov_fn_buffer *fn_buffer;
104*38fd1498Szrj unsigned len;
105*38fd1498Szrj
106*38fd1498Szrj for (ix = GCOV_COUNTERS; ix--;)
107*38fd1498Szrj if (gi_ptr->merge[ix])
108*38fd1498Szrj n_ctrs++;
109*38fd1498Szrj
110*38fd1498Szrj len = sizeof (*fn_buffer) + sizeof (fn_buffer->info.ctrs[0]) * n_ctrs;
111*38fd1498Szrj fn_buffer = (struct gcov_fn_buffer *) xmalloc (len);
112*38fd1498Szrj
113*38fd1498Szrj if (!fn_buffer)
114*38fd1498Szrj goto fail;
115*38fd1498Szrj
116*38fd1498Szrj fn_buffer->next = 0;
117*38fd1498Szrj fn_buffer->fn_ix = fn_ix;
118*38fd1498Szrj fn_buffer->info.ident = gcov_read_unsigned ();
119*38fd1498Szrj fn_buffer->info.lineno_checksum = gcov_read_unsigned ();
120*38fd1498Szrj fn_buffer->info.cfg_checksum = gcov_read_unsigned ();
121*38fd1498Szrj
122*38fd1498Szrj for (n_ctrs = ix = 0; ix != GCOV_COUNTERS; ix++)
123*38fd1498Szrj {
124*38fd1498Szrj gcov_unsigned_t length;
125*38fd1498Szrj gcov_type *values;
126*38fd1498Szrj
127*38fd1498Szrj if (!gi_ptr->merge[ix])
128*38fd1498Szrj continue;
129*38fd1498Szrj
130*38fd1498Szrj if (gcov_read_unsigned () != GCOV_TAG_FOR_COUNTER (ix))
131*38fd1498Szrj {
132*38fd1498Szrj len = 0;
133*38fd1498Szrj goto fail;
134*38fd1498Szrj }
135*38fd1498Szrj
136*38fd1498Szrj length = GCOV_TAG_COUNTER_NUM (gcov_read_unsigned ());
137*38fd1498Szrj len = length * sizeof (gcov_type);
138*38fd1498Szrj values = (gcov_type *) xmalloc (len);
139*38fd1498Szrj if (!values)
140*38fd1498Szrj goto fail;
141*38fd1498Szrj
142*38fd1498Szrj fn_buffer->info.ctrs[n_ctrs].num = length;
143*38fd1498Szrj fn_buffer->info.ctrs[n_ctrs].values = values;
144*38fd1498Szrj
145*38fd1498Szrj while (length--)
146*38fd1498Szrj *values++ = gcov_read_counter ();
147*38fd1498Szrj n_ctrs++;
148*38fd1498Szrj }
149*38fd1498Szrj
150*38fd1498Szrj *end_ptr = fn_buffer;
151*38fd1498Szrj return &fn_buffer->next;
152*38fd1498Szrj
153*38fd1498Szrj fail:
154*38fd1498Szrj gcov_error ("profiling:%s:Function %u %s %u \n", filename, fn_ix,
155*38fd1498Szrj len ? "cannot allocate" : "counter mismatch", len ? len : ix);
156*38fd1498Szrj
157*38fd1498Szrj return (struct gcov_fn_buffer **)free_fn_data (gi_ptr, fn_buffer, ix);
158*38fd1498Szrj }
159*38fd1498Szrj
160*38fd1498Szrj /* Add an unsigned value to the current crc */
161*38fd1498Szrj
162*38fd1498Szrj static gcov_unsigned_t
crc32_unsigned(gcov_unsigned_t crc32,gcov_unsigned_t value)163*38fd1498Szrj crc32_unsigned (gcov_unsigned_t crc32, gcov_unsigned_t value)
164*38fd1498Szrj {
165*38fd1498Szrj unsigned ix;
166*38fd1498Szrj
167*38fd1498Szrj for (ix = 32; ix--; value <<= 1)
168*38fd1498Szrj {
169*38fd1498Szrj unsigned feedback;
170*38fd1498Szrj
171*38fd1498Szrj feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0;
172*38fd1498Szrj crc32 <<= 1;
173*38fd1498Szrj crc32 ^= feedback;
174*38fd1498Szrj }
175*38fd1498Szrj
176*38fd1498Szrj return crc32;
177*38fd1498Szrj }
178*38fd1498Szrj
179*38fd1498Szrj /* Check if VERSION of the info block PTR matches libgcov one.
180*38fd1498Szrj Return 1 on success, or zero in case of versions mismatch.
181*38fd1498Szrj If FILENAME is not NULL, its value used for reporting purposes
182*38fd1498Szrj instead of value from the info block. */
183*38fd1498Szrj
184*38fd1498Szrj static int
gcov_version(struct gcov_info * ptr,gcov_unsigned_t version,const char * filename)185*38fd1498Szrj gcov_version (struct gcov_info *ptr, gcov_unsigned_t version,
186*38fd1498Szrj const char *filename)
187*38fd1498Szrj {
188*38fd1498Szrj if (version != GCOV_VERSION)
189*38fd1498Szrj {
190*38fd1498Szrj char v[4], e[4];
191*38fd1498Szrj
192*38fd1498Szrj GCOV_UNSIGNED2STRING (v, version);
193*38fd1498Szrj GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
194*38fd1498Szrj
195*38fd1498Szrj gcov_error ("profiling:%s:Version mismatch - expected %.4s got %.4s\n",
196*38fd1498Szrj filename? filename : ptr->filename, e, v);
197*38fd1498Szrj return 0;
198*38fd1498Szrj }
199*38fd1498Szrj return 1;
200*38fd1498Szrj }
201*38fd1498Szrj
202*38fd1498Szrj /* Insert counter VALUE into HISTOGRAM. */
203*38fd1498Szrj
204*38fd1498Szrj static void
gcov_histogram_insert(gcov_bucket_type * histogram,gcov_type value)205*38fd1498Szrj gcov_histogram_insert(gcov_bucket_type *histogram, gcov_type value)
206*38fd1498Szrj {
207*38fd1498Szrj unsigned i;
208*38fd1498Szrj
209*38fd1498Szrj i = gcov_histo_index(value);
210*38fd1498Szrj histogram[i].num_counters++;
211*38fd1498Szrj histogram[i].cum_value += value;
212*38fd1498Szrj if (value < histogram[i].min_value)
213*38fd1498Szrj histogram[i].min_value = value;
214*38fd1498Szrj }
215*38fd1498Szrj
216*38fd1498Szrj /* Computes a histogram of the arc counters to place in the summary SUM. */
217*38fd1498Szrj
218*38fd1498Szrj static void
gcov_compute_histogram(struct gcov_info * list,struct gcov_summary * sum)219*38fd1498Szrj gcov_compute_histogram (struct gcov_info *list, struct gcov_summary *sum)
220*38fd1498Szrj {
221*38fd1498Szrj struct gcov_info *gi_ptr;
222*38fd1498Szrj const struct gcov_fn_info *gfi_ptr;
223*38fd1498Szrj const struct gcov_ctr_info *ci_ptr;
224*38fd1498Szrj struct gcov_ctr_summary *cs_ptr;
225*38fd1498Szrj unsigned t_ix, f_ix, ctr_info_ix, ix;
226*38fd1498Szrj int h_ix;
227*38fd1498Szrj
228*38fd1498Szrj /* This currently only applies to arc counters. */
229*38fd1498Szrj t_ix = GCOV_COUNTER_ARCS;
230*38fd1498Szrj
231*38fd1498Szrj /* First check if there are any counts recorded for this counter. */
232*38fd1498Szrj cs_ptr = &(sum->ctrs[t_ix]);
233*38fd1498Szrj if (!cs_ptr->num)
234*38fd1498Szrj return;
235*38fd1498Szrj
236*38fd1498Szrj for (h_ix = 0; h_ix < GCOV_HISTOGRAM_SIZE; h_ix++)
237*38fd1498Szrj {
238*38fd1498Szrj cs_ptr->histogram[h_ix].num_counters = 0;
239*38fd1498Szrj cs_ptr->histogram[h_ix].min_value = cs_ptr->run_max;
240*38fd1498Szrj cs_ptr->histogram[h_ix].cum_value = 0;
241*38fd1498Szrj }
242*38fd1498Szrj
243*38fd1498Szrj /* Walk through all the per-object structures and record each of
244*38fd1498Szrj the count values in histogram. */
245*38fd1498Szrj for (gi_ptr = list; gi_ptr; gi_ptr = gi_ptr->next)
246*38fd1498Szrj {
247*38fd1498Szrj if (!gi_ptr->merge[t_ix])
248*38fd1498Szrj continue;
249*38fd1498Szrj
250*38fd1498Szrj /* Find the appropriate index into the gcov_ctr_info array
251*38fd1498Szrj for the counter we are currently working on based on the
252*38fd1498Szrj existence of the merge function pointer for this object. */
253*38fd1498Szrj for (ix = 0, ctr_info_ix = 0; ix < t_ix; ix++)
254*38fd1498Szrj {
255*38fd1498Szrj if (gi_ptr->merge[ix])
256*38fd1498Szrj ctr_info_ix++;
257*38fd1498Szrj }
258*38fd1498Szrj for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++)
259*38fd1498Szrj {
260*38fd1498Szrj gfi_ptr = gi_ptr->functions[f_ix];
261*38fd1498Szrj
262*38fd1498Szrj if (!gfi_ptr || gfi_ptr->key != gi_ptr)
263*38fd1498Szrj continue;
264*38fd1498Szrj
265*38fd1498Szrj ci_ptr = &gfi_ptr->ctrs[ctr_info_ix];
266*38fd1498Szrj for (ix = 0; ix < ci_ptr->num; ix++)
267*38fd1498Szrj gcov_histogram_insert (cs_ptr->histogram, ci_ptr->values[ix]);
268*38fd1498Szrj }
269*38fd1498Szrj }
270*38fd1498Szrj }
271*38fd1498Szrj
272*38fd1498Szrj /* buffer for the fn_data from another program. */
273*38fd1498Szrj static struct gcov_fn_buffer *fn_buffer;
274*38fd1498Szrj /* buffer for summary from other programs to be written out. */
275*38fd1498Szrj static struct gcov_summary_buffer *sum_buffer;
276*38fd1498Szrj
277*38fd1498Szrj /* This function computes the program level summary and the histo-gram.
278*38fd1498Szrj It computes and returns CRC32 and stored summary in THIS_PRG.
279*38fd1498Szrj Also determines the longest filename length of the info files. */
280*38fd1498Szrj
281*38fd1498Szrj #if !IN_GCOV_TOOL
282*38fd1498Szrj static
283*38fd1498Szrj #endif
284*38fd1498Szrj gcov_unsigned_t
compute_summary(struct gcov_info * list,struct gcov_summary * this_prg,size_t * max_length)285*38fd1498Szrj compute_summary (struct gcov_info *list, struct gcov_summary *this_prg,
286*38fd1498Szrj size_t *max_length)
287*38fd1498Szrj {
288*38fd1498Szrj struct gcov_info *gi_ptr;
289*38fd1498Szrj const struct gcov_fn_info *gfi_ptr;
290*38fd1498Szrj struct gcov_ctr_summary *cs_ptr;
291*38fd1498Szrj const struct gcov_ctr_info *ci_ptr;
292*38fd1498Szrj int f_ix;
293*38fd1498Szrj unsigned t_ix;
294*38fd1498Szrj gcov_unsigned_t c_num;
295*38fd1498Szrj gcov_unsigned_t crc32 = 0;
296*38fd1498Szrj
297*38fd1498Szrj /* Find the totals for this execution. */
298*38fd1498Szrj memset (this_prg, 0, sizeof (*this_prg));
299*38fd1498Szrj *max_length = 0;
300*38fd1498Szrj for (gi_ptr = list; gi_ptr; gi_ptr = gi_ptr->next)
301*38fd1498Szrj {
302*38fd1498Szrj size_t len = strlen (gi_ptr->filename);
303*38fd1498Szrj if (len > *max_length)
304*38fd1498Szrj *max_length = len;
305*38fd1498Szrj
306*38fd1498Szrj crc32 = crc32_unsigned (crc32, gi_ptr->stamp);
307*38fd1498Szrj crc32 = crc32_unsigned (crc32, gi_ptr->n_functions);
308*38fd1498Szrj
309*38fd1498Szrj for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++)
310*38fd1498Szrj {
311*38fd1498Szrj gfi_ptr = gi_ptr->functions[f_ix];
312*38fd1498Szrj
313*38fd1498Szrj if (gfi_ptr && gfi_ptr->key != gi_ptr)
314*38fd1498Szrj gfi_ptr = 0;
315*38fd1498Szrj
316*38fd1498Szrj crc32 = crc32_unsigned (crc32, gfi_ptr ? gfi_ptr->cfg_checksum : 0);
317*38fd1498Szrj crc32 = crc32_unsigned (crc32,
318*38fd1498Szrj gfi_ptr ? gfi_ptr->lineno_checksum : 0);
319*38fd1498Szrj if (!gfi_ptr)
320*38fd1498Szrj continue;
321*38fd1498Szrj
322*38fd1498Szrj ci_ptr = gfi_ptr->ctrs;
323*38fd1498Szrj for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++)
324*38fd1498Szrj {
325*38fd1498Szrj if (!gi_ptr->merge[t_ix])
326*38fd1498Szrj continue;
327*38fd1498Szrj
328*38fd1498Szrj cs_ptr = &(this_prg->ctrs[t_ix]);
329*38fd1498Szrj cs_ptr->num += ci_ptr->num;
330*38fd1498Szrj crc32 = crc32_unsigned (crc32, ci_ptr->num);
331*38fd1498Szrj
332*38fd1498Szrj for (c_num = 0; c_num < ci_ptr->num; c_num++)
333*38fd1498Szrj {
334*38fd1498Szrj cs_ptr->sum_all += ci_ptr->values[c_num];
335*38fd1498Szrj if (cs_ptr->run_max < ci_ptr->values[c_num])
336*38fd1498Szrj cs_ptr->run_max = ci_ptr->values[c_num];
337*38fd1498Szrj }
338*38fd1498Szrj ci_ptr++;
339*38fd1498Szrj }
340*38fd1498Szrj }
341*38fd1498Szrj }
342*38fd1498Szrj gcov_compute_histogram (list, this_prg);
343*38fd1498Szrj return crc32;
344*38fd1498Szrj }
345*38fd1498Szrj
346*38fd1498Szrj /* Including system dependent components. */
347*38fd1498Szrj #include "libgcov-driver-system.c"
348*38fd1498Szrj
349*38fd1498Szrj /* This function merges counters in GI_PTR to an existing gcda file.
350*38fd1498Szrj Return 0 on success.
351*38fd1498Szrj Return -1 on error. In this case, caller will goto read_fatal. */
352*38fd1498Szrj
353*38fd1498Szrj static int
merge_one_data(const char * filename,struct gcov_info * gi_ptr,struct gcov_summary * prg_p,struct gcov_summary * this_prg,gcov_position_t * summary_pos_p,gcov_position_t * eof_pos_p,gcov_unsigned_t crc32)354*38fd1498Szrj merge_one_data (const char *filename,
355*38fd1498Szrj struct gcov_info *gi_ptr,
356*38fd1498Szrj struct gcov_summary *prg_p,
357*38fd1498Szrj struct gcov_summary *this_prg,
358*38fd1498Szrj gcov_position_t *summary_pos_p,
359*38fd1498Szrj gcov_position_t *eof_pos_p,
360*38fd1498Szrj gcov_unsigned_t crc32)
361*38fd1498Szrj {
362*38fd1498Szrj gcov_unsigned_t tag, length;
363*38fd1498Szrj unsigned t_ix;
364*38fd1498Szrj int f_ix;
365*38fd1498Szrj int error = 0;
366*38fd1498Szrj struct gcov_fn_buffer **fn_tail = &fn_buffer;
367*38fd1498Szrj struct gcov_summary_buffer **sum_tail = &sum_buffer;
368*38fd1498Szrj
369*38fd1498Szrj length = gcov_read_unsigned ();
370*38fd1498Szrj if (!gcov_version (gi_ptr, length, filename))
371*38fd1498Szrj return -1;
372*38fd1498Szrj
373*38fd1498Szrj length = gcov_read_unsigned ();
374*38fd1498Szrj if (length != gi_ptr->stamp)
375*38fd1498Szrj /* Read from a different compilation. Overwrite the file. */
376*38fd1498Szrj return 0;
377*38fd1498Szrj
378*38fd1498Szrj /* Look for program summary. */
379*38fd1498Szrj for (f_ix = 0;;)
380*38fd1498Szrj {
381*38fd1498Szrj struct gcov_summary tmp;
382*38fd1498Szrj
383*38fd1498Szrj *eof_pos_p = gcov_position ();
384*38fd1498Szrj tag = gcov_read_unsigned ();
385*38fd1498Szrj if (tag != GCOV_TAG_PROGRAM_SUMMARY)
386*38fd1498Szrj break;
387*38fd1498Szrj
388*38fd1498Szrj f_ix--;
389*38fd1498Szrj length = gcov_read_unsigned ();
390*38fd1498Szrj gcov_read_summary (&tmp);
391*38fd1498Szrj if ((error = gcov_is_error ()))
392*38fd1498Szrj goto read_error;
393*38fd1498Szrj if (*summary_pos_p)
394*38fd1498Szrj {
395*38fd1498Szrj /* Save all summaries after the one that will be
396*38fd1498Szrj merged into below. These will need to be rewritten
397*38fd1498Szrj as histogram merging may change the number of non-zero
398*38fd1498Szrj histogram entries that will be emitted, and thus the
399*38fd1498Szrj size of the merged summary. */
400*38fd1498Szrj (*sum_tail) = (struct gcov_summary_buffer *)
401*38fd1498Szrj xmalloc (sizeof(struct gcov_summary_buffer));
402*38fd1498Szrj (*sum_tail)->summary = tmp;
403*38fd1498Szrj (*sum_tail)->next = 0;
404*38fd1498Szrj sum_tail = &((*sum_tail)->next);
405*38fd1498Szrj goto next_summary;
406*38fd1498Szrj }
407*38fd1498Szrj if (tmp.checksum != crc32)
408*38fd1498Szrj goto next_summary;
409*38fd1498Szrj
410*38fd1498Szrj for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++)
411*38fd1498Szrj if (tmp.ctrs[t_ix].num != this_prg->ctrs[t_ix].num)
412*38fd1498Szrj goto next_summary;
413*38fd1498Szrj *prg_p = tmp;
414*38fd1498Szrj *summary_pos_p = *eof_pos_p;
415*38fd1498Szrj
416*38fd1498Szrj next_summary:;
417*38fd1498Szrj }
418*38fd1498Szrj
419*38fd1498Szrj /* Merge execution counts for each function. */
420*38fd1498Szrj for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions;
421*38fd1498Szrj f_ix++, tag = gcov_read_unsigned ())
422*38fd1498Szrj {
423*38fd1498Szrj const struct gcov_ctr_info *ci_ptr;
424*38fd1498Szrj const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix];
425*38fd1498Szrj
426*38fd1498Szrj if (tag != GCOV_TAG_FUNCTION)
427*38fd1498Szrj goto read_mismatch;
428*38fd1498Szrj
429*38fd1498Szrj length = gcov_read_unsigned ();
430*38fd1498Szrj if (!length)
431*38fd1498Szrj /* This function did not appear in the other program.
432*38fd1498Szrj We have nothing to merge. */
433*38fd1498Szrj continue;
434*38fd1498Szrj
435*38fd1498Szrj if (length != GCOV_TAG_FUNCTION_LENGTH)
436*38fd1498Szrj goto read_mismatch;
437*38fd1498Szrj
438*38fd1498Szrj if (!gfi_ptr || gfi_ptr->key != gi_ptr)
439*38fd1498Szrj {
440*38fd1498Szrj /* This function appears in the other program. We
441*38fd1498Szrj need to buffer the information in order to write
442*38fd1498Szrj it back out -- we'll be inserting data before
443*38fd1498Szrj this point, so cannot simply keep the data in the
444*38fd1498Szrj file. */
445*38fd1498Szrj fn_tail = buffer_fn_data (filename, gi_ptr, fn_tail, f_ix);
446*38fd1498Szrj if (!fn_tail)
447*38fd1498Szrj goto read_mismatch;
448*38fd1498Szrj continue;
449*38fd1498Szrj }
450*38fd1498Szrj
451*38fd1498Szrj length = gcov_read_unsigned ();
452*38fd1498Szrj if (length != gfi_ptr->ident)
453*38fd1498Szrj goto read_mismatch;
454*38fd1498Szrj
455*38fd1498Szrj length = gcov_read_unsigned ();
456*38fd1498Szrj if (length != gfi_ptr->lineno_checksum)
457*38fd1498Szrj goto read_mismatch;
458*38fd1498Szrj
459*38fd1498Szrj length = gcov_read_unsigned ();
460*38fd1498Szrj if (length != gfi_ptr->cfg_checksum)
461*38fd1498Szrj goto read_mismatch;
462*38fd1498Szrj
463*38fd1498Szrj ci_ptr = gfi_ptr->ctrs;
464*38fd1498Szrj for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
465*38fd1498Szrj {
466*38fd1498Szrj gcov_merge_fn merge = gi_ptr->merge[t_ix];
467*38fd1498Szrj
468*38fd1498Szrj if (!merge)
469*38fd1498Szrj continue;
470*38fd1498Szrj
471*38fd1498Szrj tag = gcov_read_unsigned ();
472*38fd1498Szrj length = gcov_read_unsigned ();
473*38fd1498Szrj if (tag != GCOV_TAG_FOR_COUNTER (t_ix)
474*38fd1498Szrj || length != GCOV_TAG_COUNTER_LENGTH (ci_ptr->num))
475*38fd1498Szrj goto read_mismatch;
476*38fd1498Szrj (*merge) (ci_ptr->values, ci_ptr->num);
477*38fd1498Szrj ci_ptr++;
478*38fd1498Szrj }
479*38fd1498Szrj if ((error = gcov_is_error ()))
480*38fd1498Szrj goto read_error;
481*38fd1498Szrj }
482*38fd1498Szrj
483*38fd1498Szrj if (tag)
484*38fd1498Szrj {
485*38fd1498Szrj read_mismatch:;
486*38fd1498Szrj gcov_error ("profiling:%s:Merge mismatch for %s %u\n",
487*38fd1498Szrj filename, f_ix >= 0 ? "function" : "summary",
488*38fd1498Szrj f_ix < 0 ? -1 - f_ix : f_ix);
489*38fd1498Szrj return -1;
490*38fd1498Szrj }
491*38fd1498Szrj return 0;
492*38fd1498Szrj
493*38fd1498Szrj read_error:
494*38fd1498Szrj gcov_error ("profiling:%s:%s merging\n", filename,
495*38fd1498Szrj error < 0 ? "Overflow": "Error");
496*38fd1498Szrj return -1;
497*38fd1498Szrj }
498*38fd1498Szrj
499*38fd1498Szrj /* Write counters in GI_PTR and the summary in PRG to a gcda file. In
500*38fd1498Szrj the case of appending to an existing file, SUMMARY_POS will be non-zero.
501*38fd1498Szrj We will write the file starting from SUMMAY_POS. */
502*38fd1498Szrj
503*38fd1498Szrj static void
write_one_data(const struct gcov_info * gi_ptr,const struct gcov_summary * prg_p,const gcov_position_t eof_pos,const gcov_position_t summary_pos)504*38fd1498Szrj write_one_data (const struct gcov_info *gi_ptr,
505*38fd1498Szrj const struct gcov_summary *prg_p,
506*38fd1498Szrj const gcov_position_t eof_pos,
507*38fd1498Szrj const gcov_position_t summary_pos)
508*38fd1498Szrj {
509*38fd1498Szrj unsigned f_ix;
510*38fd1498Szrj struct gcov_summary_buffer *next_sum_buffer;
511*38fd1498Szrj
512*38fd1498Szrj /* Write out the data. */
513*38fd1498Szrj if (!eof_pos)
514*38fd1498Szrj {
515*38fd1498Szrj gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION);
516*38fd1498Szrj gcov_write_unsigned (gi_ptr->stamp);
517*38fd1498Szrj }
518*38fd1498Szrj
519*38fd1498Szrj if (summary_pos)
520*38fd1498Szrj gcov_seek (summary_pos);
521*38fd1498Szrj
522*38fd1498Szrj /* Generate whole program statistics. */
523*38fd1498Szrj gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, prg_p);
524*38fd1498Szrj
525*38fd1498Szrj /* Rewrite all the summaries that were after the summary we merged
526*38fd1498Szrj into. This is necessary as the merged summary may have a different
527*38fd1498Szrj size due to the number of non-zero histogram entries changing after
528*38fd1498Szrj merging. */
529*38fd1498Szrj
530*38fd1498Szrj while (sum_buffer)
531*38fd1498Szrj {
532*38fd1498Szrj gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &sum_buffer->summary);
533*38fd1498Szrj next_sum_buffer = sum_buffer->next;
534*38fd1498Szrj free (sum_buffer);
535*38fd1498Szrj sum_buffer = next_sum_buffer;
536*38fd1498Szrj }
537*38fd1498Szrj
538*38fd1498Szrj /* Write execution counts for each function. */
539*38fd1498Szrj for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++)
540*38fd1498Szrj {
541*38fd1498Szrj unsigned buffered = 0;
542*38fd1498Szrj const struct gcov_fn_info *gfi_ptr;
543*38fd1498Szrj const struct gcov_ctr_info *ci_ptr;
544*38fd1498Szrj gcov_unsigned_t length;
545*38fd1498Szrj unsigned t_ix;
546*38fd1498Szrj
547*38fd1498Szrj if (fn_buffer && fn_buffer->fn_ix == f_ix)
548*38fd1498Szrj {
549*38fd1498Szrj /* Buffered data from another program. */
550*38fd1498Szrj buffered = 1;
551*38fd1498Szrj gfi_ptr = &fn_buffer->info;
552*38fd1498Szrj length = GCOV_TAG_FUNCTION_LENGTH;
553*38fd1498Szrj }
554*38fd1498Szrj else
555*38fd1498Szrj {
556*38fd1498Szrj gfi_ptr = gi_ptr->functions[f_ix];
557*38fd1498Szrj if (gfi_ptr && gfi_ptr->key == gi_ptr)
558*38fd1498Szrj length = GCOV_TAG_FUNCTION_LENGTH;
559*38fd1498Szrj else
560*38fd1498Szrj length = 0;
561*38fd1498Szrj }
562*38fd1498Szrj
563*38fd1498Szrj gcov_write_tag_length (GCOV_TAG_FUNCTION, length);
564*38fd1498Szrj if (!length)
565*38fd1498Szrj continue;
566*38fd1498Szrj
567*38fd1498Szrj gcov_write_unsigned (gfi_ptr->ident);
568*38fd1498Szrj gcov_write_unsigned (gfi_ptr->lineno_checksum);
569*38fd1498Szrj gcov_write_unsigned (gfi_ptr->cfg_checksum);
570*38fd1498Szrj
571*38fd1498Szrj ci_ptr = gfi_ptr->ctrs;
572*38fd1498Szrj for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
573*38fd1498Szrj {
574*38fd1498Szrj gcov_unsigned_t n_counts;
575*38fd1498Szrj gcov_type *c_ptr;
576*38fd1498Szrj
577*38fd1498Szrj if (!gi_ptr->merge[t_ix])
578*38fd1498Szrj continue;
579*38fd1498Szrj
580*38fd1498Szrj n_counts = ci_ptr->num;
581*38fd1498Szrj gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix),
582*38fd1498Szrj GCOV_TAG_COUNTER_LENGTH (n_counts));
583*38fd1498Szrj c_ptr = ci_ptr->values;
584*38fd1498Szrj while (n_counts--)
585*38fd1498Szrj gcov_write_counter (*c_ptr++);
586*38fd1498Szrj ci_ptr++;
587*38fd1498Szrj }
588*38fd1498Szrj if (buffered)
589*38fd1498Szrj fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS);
590*38fd1498Szrj }
591*38fd1498Szrj
592*38fd1498Szrj gcov_write_unsigned (0);
593*38fd1498Szrj }
594*38fd1498Szrj
595*38fd1498Szrj /* Helper function for merging summary.
596*38fd1498Szrj Return -1 on error. Return 0 on success. */
597*38fd1498Szrj
598*38fd1498Szrj static int
merge_summary(const char * filename,int run_counted,const struct gcov_info * gi_ptr,struct gcov_summary * prg,struct gcov_summary * this_prg,gcov_unsigned_t crc32,struct gcov_summary * all_prg)599*38fd1498Szrj merge_summary (const char *filename, int run_counted,
600*38fd1498Szrj const struct gcov_info *gi_ptr, struct gcov_summary *prg,
601*38fd1498Szrj struct gcov_summary *this_prg, gcov_unsigned_t crc32,
602*38fd1498Szrj struct gcov_summary *all_prg __attribute__ ((unused)))
603*38fd1498Szrj {
604*38fd1498Szrj struct gcov_ctr_summary *cs_prg, *cs_tprg;
605*38fd1498Szrj unsigned t_ix;
606*38fd1498Szrj #if !GCOV_LOCKED
607*38fd1498Szrj /* summary for all instances of program. */
608*38fd1498Szrj struct gcov_ctr_summary *cs_all;
609*38fd1498Szrj #endif
610*38fd1498Szrj
611*38fd1498Szrj /* Merge the summaries. */
612*38fd1498Szrj for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
613*38fd1498Szrj {
614*38fd1498Szrj cs_prg = &(prg->ctrs[t_ix]);
615*38fd1498Szrj cs_tprg = &(this_prg->ctrs[t_ix]);
616*38fd1498Szrj
617*38fd1498Szrj if (gi_ptr->merge[t_ix])
618*38fd1498Szrj {
619*38fd1498Szrj int first = !cs_prg->runs;
620*38fd1498Szrj
621*38fd1498Szrj if (!run_counted)
622*38fd1498Szrj cs_prg->runs++;
623*38fd1498Szrj if (first)
624*38fd1498Szrj cs_prg->num = cs_tprg->num;
625*38fd1498Szrj cs_prg->sum_all += cs_tprg->sum_all;
626*38fd1498Szrj if (cs_prg->run_max < cs_tprg->run_max)
627*38fd1498Szrj cs_prg->run_max = cs_tprg->run_max;
628*38fd1498Szrj cs_prg->sum_max += cs_tprg->run_max;
629*38fd1498Szrj if (first)
630*38fd1498Szrj memcpy (cs_prg->histogram, cs_tprg->histogram,
631*38fd1498Szrj sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE);
632*38fd1498Szrj else
633*38fd1498Szrj gcov_histogram_merge (cs_prg->histogram, cs_tprg->histogram);
634*38fd1498Szrj }
635*38fd1498Szrj else if (cs_prg->runs)
636*38fd1498Szrj {
637*38fd1498Szrj gcov_error ("profiling:%s:Merge mismatch for summary.\n",
638*38fd1498Szrj filename);
639*38fd1498Szrj return -1;
640*38fd1498Szrj }
641*38fd1498Szrj #if !GCOV_LOCKED
642*38fd1498Szrj cs_all = &all_prg->ctrs[t_ix];
643*38fd1498Szrj if (!cs_all->runs && cs_prg->runs)
644*38fd1498Szrj {
645*38fd1498Szrj cs_all->num = cs_prg->num;
646*38fd1498Szrj cs_all->runs = cs_prg->runs;
647*38fd1498Szrj cs_all->sum_all = cs_prg->sum_all;
648*38fd1498Szrj cs_all->run_max = cs_prg->run_max;
649*38fd1498Szrj cs_all->sum_max = cs_prg->sum_max;
650*38fd1498Szrj }
651*38fd1498Szrj else if (!all_prg->checksum
652*38fd1498Szrj /* Don't compare the histograms, which may have slight
653*38fd1498Szrj variations depending on the order they were updated
654*38fd1498Szrj due to the truncating integer divides used in the
655*38fd1498Szrj merge. */
656*38fd1498Szrj && (cs_all->num != cs_prg->num
657*38fd1498Szrj || cs_all->runs != cs_prg->runs
658*38fd1498Szrj || cs_all->sum_all != cs_prg->sum_all
659*38fd1498Szrj || cs_all->run_max != cs_prg->run_max
660*38fd1498Szrj || cs_all->sum_max != cs_prg->sum_max))
661*38fd1498Szrj {
662*38fd1498Szrj gcov_error ("profiling:%s:Data file mismatch - some "
663*38fd1498Szrj "data files may have been concurrently "
664*38fd1498Szrj "updated without locking support\n", filename);
665*38fd1498Szrj all_prg->checksum = ~0u;
666*38fd1498Szrj }
667*38fd1498Szrj #endif
668*38fd1498Szrj }
669*38fd1498Szrj
670*38fd1498Szrj prg->checksum = crc32;
671*38fd1498Szrj
672*38fd1498Szrj return 0;
673*38fd1498Szrj }
674*38fd1498Szrj
675*38fd1498Szrj
676*38fd1498Szrj /* Sort N entries in VALUE_ARRAY in descending order.
677*38fd1498Szrj Each entry in VALUE_ARRAY has two values. The sorting
678*38fd1498Szrj is based on the second value. */
679*38fd1498Szrj
680*38fd1498Szrj GCOV_LINKAGE void
gcov_sort_n_vals(gcov_type * value_array,int n)681*38fd1498Szrj gcov_sort_n_vals (gcov_type *value_array, int n)
682*38fd1498Szrj {
683*38fd1498Szrj int j, k;
684*38fd1498Szrj
685*38fd1498Szrj for (j = 2; j < n; j += 2)
686*38fd1498Szrj {
687*38fd1498Szrj gcov_type cur_ent[2];
688*38fd1498Szrj
689*38fd1498Szrj cur_ent[0] = value_array[j];
690*38fd1498Szrj cur_ent[1] = value_array[j + 1];
691*38fd1498Szrj k = j - 2;
692*38fd1498Szrj while (k >= 0 && value_array[k + 1] < cur_ent[1])
693*38fd1498Szrj {
694*38fd1498Szrj value_array[k + 2] = value_array[k];
695*38fd1498Szrj value_array[k + 3] = value_array[k+1];
696*38fd1498Szrj k -= 2;
697*38fd1498Szrj }
698*38fd1498Szrj value_array[k + 2] = cur_ent[0];
699*38fd1498Szrj value_array[k + 3] = cur_ent[1];
700*38fd1498Szrj }
701*38fd1498Szrj }
702*38fd1498Szrj
703*38fd1498Szrj /* Sort the profile counters for all indirect call sites. Counters
704*38fd1498Szrj for each call site are allocated in array COUNTERS. */
705*38fd1498Szrj
706*38fd1498Szrj static void
gcov_sort_icall_topn_counter(const struct gcov_ctr_info * counters)707*38fd1498Szrj gcov_sort_icall_topn_counter (const struct gcov_ctr_info *counters)
708*38fd1498Szrj {
709*38fd1498Szrj int i;
710*38fd1498Szrj gcov_type *values;
711*38fd1498Szrj int n = counters->num;
712*38fd1498Szrj
713*38fd1498Szrj gcc_assert (!(n % GCOV_ICALL_TOPN_NCOUNTS));
714*38fd1498Szrj values = counters->values;
715*38fd1498Szrj
716*38fd1498Szrj for (i = 0; i < n; i += GCOV_ICALL_TOPN_NCOUNTS)
717*38fd1498Szrj {
718*38fd1498Szrj gcov_type *value_array = &values[i + 1];
719*38fd1498Szrj gcov_sort_n_vals (value_array, GCOV_ICALL_TOPN_NCOUNTS - 1);
720*38fd1498Szrj }
721*38fd1498Szrj }
722*38fd1498Szrj
723*38fd1498Szrj /* Sort topn indirect_call profile counters in GI_PTR. */
724*38fd1498Szrj
725*38fd1498Szrj static void
gcov_sort_topn_counter_arrays(const struct gcov_info * gi_ptr)726*38fd1498Szrj gcov_sort_topn_counter_arrays (const struct gcov_info *gi_ptr)
727*38fd1498Szrj {
728*38fd1498Szrj unsigned int i;
729*38fd1498Szrj int f_ix;
730*38fd1498Szrj const struct gcov_fn_info *gfi_ptr;
731*38fd1498Szrj const struct gcov_ctr_info *ci_ptr;
732*38fd1498Szrj
733*38fd1498Szrj if (!gi_ptr->merge[GCOV_COUNTER_ICALL_TOPNV])
734*38fd1498Szrj return;
735*38fd1498Szrj
736*38fd1498Szrj for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++)
737*38fd1498Szrj {
738*38fd1498Szrj gfi_ptr = gi_ptr->functions[f_ix];
739*38fd1498Szrj ci_ptr = gfi_ptr->ctrs;
740*38fd1498Szrj for (i = 0; i < GCOV_COUNTERS; i++)
741*38fd1498Szrj {
742*38fd1498Szrj if (!gi_ptr->merge[i])
743*38fd1498Szrj continue;
744*38fd1498Szrj if (i == GCOV_COUNTER_ICALL_TOPNV)
745*38fd1498Szrj {
746*38fd1498Szrj gcov_sort_icall_topn_counter (ci_ptr);
747*38fd1498Szrj break;
748*38fd1498Szrj }
749*38fd1498Szrj ci_ptr++;
750*38fd1498Szrj }
751*38fd1498Szrj }
752*38fd1498Szrj }
753*38fd1498Szrj
754*38fd1498Szrj /* Dump the coverage counts for one gcov_info object. We merge with existing
755*38fd1498Szrj counts when possible, to avoid growing the .da files ad infinitum. We use
756*38fd1498Szrj this program's checksum to make sure we only accumulate whole program
757*38fd1498Szrj statistics to the correct summary. An object file might be embedded
758*38fd1498Szrj in two separate programs, and we must keep the two program
759*38fd1498Szrj summaries separate. */
760*38fd1498Szrj
761*38fd1498Szrj static void
dump_one_gcov(struct gcov_info * gi_ptr,struct gcov_filename * gf,unsigned run_counted,gcov_unsigned_t crc32,struct gcov_summary * all_prg,struct gcov_summary * this_prg)762*38fd1498Szrj dump_one_gcov (struct gcov_info *gi_ptr, struct gcov_filename *gf,
763*38fd1498Szrj unsigned run_counted,
764*38fd1498Szrj gcov_unsigned_t crc32, struct gcov_summary *all_prg,
765*38fd1498Szrj struct gcov_summary *this_prg)
766*38fd1498Szrj {
767*38fd1498Szrj struct gcov_summary prg; /* summary for this object over all program. */
768*38fd1498Szrj int error;
769*38fd1498Szrj gcov_unsigned_t tag;
770*38fd1498Szrj gcov_position_t summary_pos = 0;
771*38fd1498Szrj gcov_position_t eof_pos = 0;
772*38fd1498Szrj
773*38fd1498Szrj fn_buffer = 0;
774*38fd1498Szrj sum_buffer = 0;
775*38fd1498Szrj
776*38fd1498Szrj gcov_sort_topn_counter_arrays (gi_ptr);
777*38fd1498Szrj
778*38fd1498Szrj error = gcov_exit_open_gcda_file (gi_ptr, gf);
779*38fd1498Szrj if (error == -1)
780*38fd1498Szrj return;
781*38fd1498Szrj
782*38fd1498Szrj tag = gcov_read_unsigned ();
783*38fd1498Szrj if (tag)
784*38fd1498Szrj {
785*38fd1498Szrj /* Merge data from file. */
786*38fd1498Szrj if (tag != GCOV_DATA_MAGIC)
787*38fd1498Szrj {
788*38fd1498Szrj gcov_error ("profiling:%s:Not a gcov data file\n", gf->filename);
789*38fd1498Szrj goto read_fatal;
790*38fd1498Szrj }
791*38fd1498Szrj error = merge_one_data (gf->filename, gi_ptr, &prg, this_prg,
792*38fd1498Szrj &summary_pos, &eof_pos, crc32);
793*38fd1498Szrj if (error == -1)
794*38fd1498Szrj goto read_fatal;
795*38fd1498Szrj }
796*38fd1498Szrj
797*38fd1498Szrj gcov_rewrite ();
798*38fd1498Szrj
799*38fd1498Szrj if (!summary_pos)
800*38fd1498Szrj {
801*38fd1498Szrj memset (&prg, 0, sizeof (prg));
802*38fd1498Szrj summary_pos = eof_pos;
803*38fd1498Szrj }
804*38fd1498Szrj
805*38fd1498Szrj error = merge_summary (gf->filename, run_counted, gi_ptr, &prg, this_prg,
806*38fd1498Szrj crc32, all_prg);
807*38fd1498Szrj if (error == -1)
808*38fd1498Szrj goto read_fatal;
809*38fd1498Szrj
810*38fd1498Szrj write_one_data (gi_ptr, &prg, eof_pos, summary_pos);
811*38fd1498Szrj /* fall through */
812*38fd1498Szrj
813*38fd1498Szrj read_fatal:;
814*38fd1498Szrj while (fn_buffer)
815*38fd1498Szrj fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS);
816*38fd1498Szrj
817*38fd1498Szrj if ((error = gcov_close ()))
818*38fd1498Szrj gcov_error (error < 0 ?
819*38fd1498Szrj "profiling:%s:Overflow writing\n" :
820*38fd1498Szrj "profiling:%s:Error writing\n",
821*38fd1498Szrj gf->filename);
822*38fd1498Szrj }
823*38fd1498Szrj
824*38fd1498Szrj
825*38fd1498Szrj /* Dump all the coverage counts for the program. It first computes program
826*38fd1498Szrj summary and then traverses gcov_list list and dumps the gcov_info
827*38fd1498Szrj objects one by one. */
828*38fd1498Szrj
829*38fd1498Szrj #if !IN_GCOV_TOOL
830*38fd1498Szrj static
831*38fd1498Szrj #endif
832*38fd1498Szrj void
gcov_do_dump(struct gcov_info * list,int run_counted)833*38fd1498Szrj gcov_do_dump (struct gcov_info *list, int run_counted)
834*38fd1498Szrj {
835*38fd1498Szrj struct gcov_info *gi_ptr;
836*38fd1498Szrj struct gcov_filename gf;
837*38fd1498Szrj gcov_unsigned_t crc32;
838*38fd1498Szrj struct gcov_summary all_prg;
839*38fd1498Szrj struct gcov_summary this_prg;
840*38fd1498Szrj
841*38fd1498Szrj crc32 = compute_summary (list, &this_prg, &gf.max_length);
842*38fd1498Szrj
843*38fd1498Szrj allocate_filename_struct (&gf);
844*38fd1498Szrj #if !GCOV_LOCKED
845*38fd1498Szrj memset (&all_prg, 0, sizeof (all_prg));
846*38fd1498Szrj #endif
847*38fd1498Szrj
848*38fd1498Szrj /* Now merge each file. */
849*38fd1498Szrj for (gi_ptr = list; gi_ptr; gi_ptr = gi_ptr->next)
850*38fd1498Szrj dump_one_gcov (gi_ptr, &gf, run_counted, crc32, &all_prg, &this_prg);
851*38fd1498Szrj
852*38fd1498Szrj free (gf.filename);
853*38fd1498Szrj }
854*38fd1498Szrj
855*38fd1498Szrj #if IN_GCOV_TOOL
856*38fd1498Szrj const char *
857*38fd1498Szrj __attribute__ ((unused))
gcov_get_filename(struct gcov_info * list)858*38fd1498Szrj gcov_get_filename (struct gcov_info *list)
859*38fd1498Szrj {
860*38fd1498Szrj return list->filename;
861*38fd1498Szrj }
862*38fd1498Szrj #endif
863*38fd1498Szrj
864*38fd1498Szrj #if !IN_GCOV_TOOL
865*38fd1498Szrj void
__gcov_dump_one(struct gcov_root * root)866*38fd1498Szrj __gcov_dump_one (struct gcov_root *root)
867*38fd1498Szrj {
868*38fd1498Szrj if (root->dumped)
869*38fd1498Szrj return;
870*38fd1498Szrj
871*38fd1498Szrj gcov_do_dump (root->list, root->run_counted);
872*38fd1498Szrj
873*38fd1498Szrj root->dumped = 1;
874*38fd1498Szrj root->run_counted = 1;
875*38fd1498Szrj }
876*38fd1498Szrj
877*38fd1498Szrj /* Per-dynamic-object gcov state. */
878*38fd1498Szrj struct gcov_root __gcov_root;
879*38fd1498Szrj
880*38fd1498Szrj /* Exactly one of these will be live in the process image. */
881*38fd1498Szrj struct gcov_master __gcov_master =
882*38fd1498Szrj {GCOV_VERSION, 0};
883*38fd1498Szrj
884*38fd1498Szrj void
__gcov_exit(void)885*38fd1498Szrj __gcov_exit (void)
886*38fd1498Szrj {
887*38fd1498Szrj __gcov_dump_one (&__gcov_root);
888*38fd1498Szrj if (__gcov_root.next)
889*38fd1498Szrj __gcov_root.next->prev = __gcov_root.prev;
890*38fd1498Szrj if (__gcov_root.prev)
891*38fd1498Szrj __gcov_root.prev->next = __gcov_root.next;
892*38fd1498Szrj else
893*38fd1498Szrj __gcov_master.root = __gcov_root.next;
894*38fd1498Szrj
895*38fd1498Szrj gcov_error_exit ();
896*38fd1498Szrj }
897*38fd1498Szrj
898*38fd1498Szrj /* Add a new object file onto the bb chain. Invoked automatically
899*38fd1498Szrj when running an object file's global ctors. */
900*38fd1498Szrj
901*38fd1498Szrj void
__gcov_init(struct gcov_info * info)902*38fd1498Szrj __gcov_init (struct gcov_info *info)
903*38fd1498Szrj {
904*38fd1498Szrj if (!info->version || !info->n_functions)
905*38fd1498Szrj return;
906*38fd1498Szrj if (gcov_version (info, info->version, 0))
907*38fd1498Szrj {
908*38fd1498Szrj if (!__gcov_root.list)
909*38fd1498Szrj {
910*38fd1498Szrj /* Add to master list and at exit function. */
911*38fd1498Szrj if (gcov_version (NULL, __gcov_master.version, "<master>"))
912*38fd1498Szrj {
913*38fd1498Szrj __gcov_root.next = __gcov_master.root;
914*38fd1498Szrj if (__gcov_master.root)
915*38fd1498Szrj __gcov_master.root->prev = &__gcov_root;
916*38fd1498Szrj __gcov_master.root = &__gcov_root;
917*38fd1498Szrj }
918*38fd1498Szrj }
919*38fd1498Szrj
920*38fd1498Szrj info->next = __gcov_root.list;
921*38fd1498Szrj __gcov_root.list = info;
922*38fd1498Szrj }
923*38fd1498Szrj }
924*38fd1498Szrj #endif /* !IN_GCOV_TOOL */
925*38fd1498Szrj #endif /* L_gcov */
926*38fd1498Szrj #endif /* inhibit_libc */
927