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5489fcc3 KR |
1 | /* |
2 | * Input and output from/to gmon.out files. | |
3 | */ | |
4 | #include "cg_arcs.h" | |
5 | #include "basic_blocks.h" | |
6 | #include "bfd.h" | |
7 | #include "core.h" | |
8 | #include "call_graph.h" | |
9 | #include "gmon_io.h" | |
10 | #include "gmon_out.h" | |
11 | #include "gmon.h" /* fetch header for old format */ | |
12 | #include "gprof.h" | |
13 | #include "hertz.h" | |
14 | #include "hist.h" | |
15 | #include "libiberty.h" | |
16 | ||
17 | int gmon_input = 0; | |
18 | int gmon_file_version = 0; /* 0 == old (non-versioned) file format */ | |
19 | ||
20 | /* | |
21 | * This probably ought to be in libbfd. | |
22 | */ | |
23 | bfd_vma | |
24 | DEFUN(get_vma, (abfd, addr), bfd *abfd AND bfd_byte *addr) | |
25 | { | |
26 | switch (sizeof(bfd_vma)) { | |
27 | case 4: return bfd_get_32(abfd, addr); | |
28 | case 8: return bfd_get_64(abfd, addr); | |
29 | default: | |
30 | fprintf(stderr, "%s: bfd_vma has unexpected size of %ld bytes\n", | |
31 | whoami, (long) sizeof(bfd_vma)); | |
32 | done(1); | |
33 | } /* switch */ | |
34 | } /* get_vma */ | |
35 | ||
36 | ||
37 | /* | |
38 | * This probably ought to be in libbfd. | |
39 | */ | |
40 | void | |
41 | DEFUN(put_vma, (abfd, val, addr), bfd *abfd AND bfd_vma val AND bfd_byte *addr) | |
42 | { | |
43 | switch (sizeof(bfd_vma)) { | |
44 | case 4: bfd_put_32(abfd, val, addr); break; | |
45 | case 8: bfd_put_64(abfd, val, addr); break; | |
46 | default: | |
47 | fprintf(stderr, "%s: bfd_vma has unexpected size of %ld bytes\n", | |
48 | whoami, (long) sizeof(bfd_vma)); | |
49 | done(1); | |
50 | } /* switch */ | |
51 | } /* put_vma */ | |
52 | ||
53 | ||
54 | void | |
55 | DEFUN(gmon_out_read, (filename), const char *filename) | |
56 | { | |
57 | FILE *ifp; | |
58 | struct gmon_hdr ghdr; | |
59 | unsigned char tag; | |
60 | int nhist = 0, narcs = 0, nbbs = 0; | |
61 | ||
62 | /* open gmon.out file: */ | |
63 | ||
64 | if (strcmp(filename, "-") == 0) { | |
65 | ifp = stdin; | |
66 | } else { | |
67 | ifp = fopen(filename, FOPEN_RB); | |
68 | if (!ifp) { | |
69 | perror(filename); | |
70 | done(1); | |
71 | } /* if */ | |
72 | } /* if */ | |
73 | if (fread(&ghdr, sizeof(struct gmon_hdr), 1, ifp) != 1) { | |
74 | fprintf(stderr, "%s: file too short to be a gmon file\n", | |
75 | filename); | |
76 | done(1); | |
77 | } /* if */ | |
78 | ||
79 | if ((file_format == FF_MAGIC) || | |
80 | (file_format == FF_AUTO && !strncmp(&ghdr.cookie[0], GMON_MAGIC, 4))) | |
81 | { | |
82 | if (file_format == FF_MAGIC && strncmp(&ghdr.cookie[0], GMON_MAGIC, 4)) | |
83 | { | |
84 | fprintf(stderr, "%s: file `%s' has bad magic cookie\n", | |
85 | whoami, filename); | |
86 | done(1); | |
87 | } /* if */ | |
88 | ||
89 | /* right magic, so it's probably really a new gmon.out file */ | |
90 | ||
91 | gmon_file_version = bfd_get_32(core_bfd, (bfd_byte *) ghdr.version); | |
92 | if (gmon_file_version != GMON_VERSION && gmon_file_version != 0) { | |
93 | fprintf(stderr, | |
94 | "%s: file `%s' has unsupported version %d\n", | |
95 | whoami, filename, gmon_file_version); | |
96 | done(1); | |
97 | } /* if */ | |
98 | ||
99 | /* read in all the records: */ | |
100 | while (fread(&tag, sizeof(tag), 1, ifp) == 1) { | |
101 | switch (tag) { | |
102 | case GMON_TAG_TIME_HIST: | |
103 | ++nhist; | |
104 | gmon_input |= INPUT_HISTOGRAM; | |
105 | hist_read_rec(ifp, filename); | |
106 | break; | |
107 | ||
108 | case GMON_TAG_CG_ARC: | |
109 | ++narcs; | |
110 | gmon_input |= INPUT_CALL_GRAPH; | |
111 | cg_read_rec(ifp, filename); | |
112 | break; | |
113 | ||
114 | case GMON_TAG_BB_COUNT: | |
115 | ++nbbs; | |
116 | gmon_input |= INPUT_BB_COUNTS; | |
117 | bb_read_rec(ifp, filename); | |
118 | break; | |
119 | ||
120 | default: | |
121 | fprintf(stderr, | |
122 | "%s: %s: found bad tag %d (file corrupted?)\n", | |
123 | whoami, filename, tag); | |
124 | done(1); | |
125 | } /* switch */ | |
126 | } /* while */ | |
127 | } else if (file_format == FF_AUTO || file_format == FF_BSD) { | |
128 | struct hdr { | |
129 | bfd_vma low_pc; | |
130 | bfd_vma high_pc; | |
131 | int ncnt; | |
132 | }; | |
133 | int i, samp_bytes, count; | |
134 | bfd_vma from_pc, self_pc; | |
135 | struct raw_arc raw_arc; | |
136 | struct raw_phdr raw; | |
137 | static struct hdr h; | |
138 | UNIT raw_bin_count; | |
139 | struct hdr tmp; | |
140 | ||
141 | /* | |
142 | * Information from a gmon.out file is in two parts: an array of | |
143 | * sampling hits within pc ranges, and the arcs. | |
144 | */ | |
145 | gmon_input = INPUT_HISTOGRAM | INPUT_CALL_GRAPH; | |
146 | ||
147 | /* | |
148 | * This fseek() ought to work even on stdin as long as it's | |
149 | * not an interactive device (heck, is there anybody who would | |
150 | * want to type in a gmon.out at the terminal?). | |
151 | */ | |
152 | if (fseek(ifp, 0, SEEK_SET) < 0) { | |
153 | perror(filename); | |
154 | done(1); | |
155 | } /* if */ | |
156 | if (fread(&raw, 1, sizeof(struct raw_phdr), ifp) | |
157 | != sizeof(struct raw_phdr)) | |
158 | { | |
159 | fprintf(stderr, "%s: file too short to be a gmon file\n", | |
160 | filename); | |
161 | done(1); | |
162 | } /* if */ | |
163 | tmp.low_pc = get_vma(core_bfd, (bfd_byte *) &raw.low_pc[0]); | |
164 | tmp.high_pc = get_vma(core_bfd, (bfd_byte *) &raw.high_pc[0]); | |
165 | tmp.ncnt = bfd_get_32(core_bfd, (bfd_byte *) &raw.ncnt[0]); | |
166 | if (s_highpc && (tmp.low_pc != h.low_pc || | |
167 | tmp.high_pc != h.high_pc || tmp.ncnt != h.ncnt)) | |
168 | { | |
169 | fprintf(stderr, "%s: incompatible with first gmon file\n", | |
170 | filename); | |
171 | done(1); | |
172 | } /* if */ | |
173 | h = tmp; | |
174 | s_lowpc = (bfd_vma) h.low_pc; | |
175 | s_highpc = (bfd_vma) h.high_pc; | |
176 | lowpc = (bfd_vma) h.low_pc / sizeof(UNIT); | |
177 | highpc = (bfd_vma) h.high_pc / sizeof(UNIT); | |
178 | samp_bytes = h.ncnt - sizeof(struct raw_phdr); | |
179 | hist_num_bins = samp_bytes / sizeof (UNIT); | |
180 | DBG(SAMPLEDEBUG, | |
181 | printf("[gmon_out_read] lowpc 0x%lx highpc 0x%lx ncnt %d\n", | |
182 | h.low_pc, h.high_pc, h.ncnt); | |
183 | printf("[gmon_out_read] s_lowpc 0x%lx s_highpc 0x%lx\n", | |
184 | s_lowpc, s_highpc); | |
185 | printf("[gmon_out_read] lowpc 0x%lx highpc 0x%lx\n", | |
186 | lowpc, highpc); | |
187 | printf("[gmon_out_read] samp_bytes %d hist_num_bins %d\n", | |
188 | samp_bytes, hist_num_bins)); | |
189 | ||
190 | if (hist_num_bins) { | |
191 | ++nhist; | |
192 | } /* if */ | |
193 | ||
194 | if (!hist_sample) { | |
195 | hist_sample = | |
196 | (int*) xmalloc(hist_num_bins * sizeof(hist_sample[0])); | |
197 | memset(hist_sample, 0, hist_num_bins * sizeof(hist_sample[0])); | |
198 | } /* if */ | |
199 | ||
200 | for (i = 0; i < hist_num_bins; ++i) { | |
201 | if (fread(raw_bin_count, sizeof(raw_bin_count), 1, ifp) != 1) { | |
202 | fprintf(stderr, | |
203 | "%s: unexpected EOF after reading %d/%d bins\n", | |
204 | whoami, --i, hist_num_bins); | |
205 | done(1); | |
206 | } /* if */ | |
207 | hist_sample[i] += bfd_get_16(core_bfd, (bfd_byte*) raw_bin_count); | |
208 | } /* for */ | |
209 | ||
210 | /* | |
211 | * The rest of the file consists of a bunch of <from,self,count> | |
212 | * tuples: | |
213 | */ | |
214 | while (fread(&raw_arc, sizeof(raw_arc), 1, ifp) == 1) { | |
215 | ++narcs; | |
216 | from_pc = get_vma(core_bfd, (bfd_byte *) raw_arc.from_pc); | |
217 | self_pc = get_vma(core_bfd, (bfd_byte *) raw_arc.self_pc); | |
218 | count = bfd_get_32(core_bfd, (bfd_byte *) raw_arc.count); | |
219 | DBG(SAMPLEDEBUG, | |
220 | printf("[gmon_out_read] frompc 0x%lx selfpc 0x%lx count %d\n", | |
221 | from_pc, self_pc, count)); | |
222 | /* add this arc: */ | |
223 | cg_tally(from_pc, self_pc, count); | |
224 | } /* while */ | |
225 | fclose(ifp); | |
226 | ||
227 | if (hz == HZ_WRONG) { | |
228 | /* | |
229 | * How many ticks per second? If we can't tell, report | |
230 | * time in ticks. | |
231 | */ | |
232 | hz = hertz(); | |
233 | if (hz == HZ_WRONG) { | |
234 | hz = 1; | |
235 | fprintf(stderr, "time is in ticks, not seconds\n"); | |
236 | } /* if */ | |
237 | } /* if */ | |
238 | } else { | |
239 | fprintf(stderr, "%s: don't know how to deal with file format %d\n", | |
240 | whoami, file_format); | |
241 | done(1); | |
242 | } /* if */ | |
243 | ||
244 | if (output_style & STYLE_GMON_INFO) { | |
245 | printf("File `%s' (version %d) contains:\n", | |
246 | filename, gmon_file_version); | |
247 | printf("\t%d histogram record%s\n", | |
248 | nhist, nhist == 1 ? "" : "s"); | |
249 | printf("\t%d call-graph record%s\n", | |
250 | narcs, narcs == 1 ? "" : "s"); | |
251 | printf("\t%d basic-block count record%s\n", | |
252 | nbbs, nbbs == 1 ? "" : "s"); | |
253 | first_output = FALSE; | |
254 | } /* if */ | |
255 | } /* gmon_out_read */ | |
256 | ||
257 | ||
258 | void | |
259 | DEFUN(gmon_out_write, (filename), const char *filename) | |
260 | { | |
261 | FILE *ofp; | |
262 | struct gmon_hdr ghdr; | |
263 | ||
264 | ofp = fopen(filename, FOPEN_WB); | |
265 | if (!ofp) { | |
266 | perror(filename); | |
267 | done(1); | |
268 | } /* if */ | |
269 | ||
270 | if (file_format == FF_AUTO || file_format == FF_MAGIC) { | |
271 | /* write gmon header: */ | |
272 | ||
273 | memcpy(&ghdr.cookie[0], GMON_MAGIC, 4); | |
274 | bfd_put_32(core_bfd, GMON_VERSION, (bfd_byte*) ghdr.version); | |
275 | if (fwrite(&ghdr, sizeof(ghdr), 1, ofp) != 1) { | |
276 | perror(filename); | |
277 | done(1); | |
278 | } /* if */ | |
279 | ||
280 | /* write execution time histogram if we have one: */ | |
281 | if (gmon_input & INPUT_HISTOGRAM) { | |
282 | hist_write_hist(ofp, filename); | |
283 | } /* if */ | |
284 | ||
285 | /* write call graph arcs if we have any: */ | |
286 | if (gmon_input & INPUT_CALL_GRAPH) { | |
287 | cg_write_arcs(ofp, filename); | |
288 | } /* if */ | |
289 | ||
290 | /* write basic-block info if we have it: */ | |
291 | if (gmon_input & INPUT_BB_COUNTS) { | |
292 | bb_write_blocks(ofp, filename); | |
293 | } /* if */ | |
294 | } else if (file_format == FF_BSD) { | |
295 | struct raw_arc raw_arc; | |
296 | UNIT raw_bin_count; | |
297 | bfd_vma lpc, hpc; | |
298 | int i, ncnt; | |
299 | Arc *arc; | |
300 | Sym *sym; | |
301 | ||
302 | put_vma(core_bfd, s_lowpc, (bfd_byte*) &lpc); | |
303 | put_vma(core_bfd, s_highpc, (bfd_byte*) &hpc); | |
304 | bfd_put_32(core_bfd, | |
305 | hist_num_bins * sizeof(UNIT) + sizeof(struct raw_phdr), | |
306 | (bfd_byte*) &ncnt); | |
307 | ||
308 | /* write header: */ | |
309 | if (fwrite(&lpc, sizeof(lpc), 1, ofp) != 1 | |
310 | || fwrite(&hpc, sizeof(hpc), 1, ofp) != 1 | |
311 | || fwrite(&ncnt, sizeof(ncnt), 1, ofp) != 1) | |
312 | { | |
313 | perror(filename); | |
314 | done(1); | |
315 | } /* if */ | |
316 | ||
317 | /* dump the samples: */ | |
318 | ||
319 | for (i = 0; i < hist_num_bins; ++i) { | |
320 | bfd_put_16(core_bfd, hist_sample[i], (bfd_byte*)&raw_bin_count[0]); | |
321 | if (fwrite(&raw_bin_count[0], sizeof(raw_bin_count), 1, ofp) != 1) | |
322 | { | |
323 | perror(filename); | |
324 | done(1); | |
325 | } /* if */ | |
326 | } /* for */ | |
327 | ||
328 | /* dump the normalized raw arc information: */ | |
329 | ||
330 | for (sym = symtab.base; sym < symtab.limit; ++sym) { | |
331 | for (arc = sym->cg.children; arc; arc = arc->next_child) { | |
332 | put_vma(core_bfd, arc->parent->addr, | |
333 | (bfd_byte*) raw_arc.from_pc); | |
334 | put_vma(core_bfd, arc->child->addr, | |
335 | (bfd_byte*) raw_arc.self_pc); | |
336 | bfd_put_32(core_bfd, arc->count, (bfd_byte*) raw_arc.count); | |
337 | if (fwrite(&raw_arc, sizeof(raw_arc), 1, ofp) != 1) { | |
338 | perror(filename); | |
339 | done(1); | |
340 | } /* if */ | |
341 | DBG(SAMPLEDEBUG, | |
342 | printf("[dumpsum] frompc 0x%lx selfpc 0x%lx count %d\n", | |
343 | arc->parent->addr, arc->child->addr, arc->count)); | |
344 | } /* for */ | |
345 | } /* for */ | |
346 | fclose(ofp); | |
347 | } else { | |
348 | fprintf(stderr, "%s: don't know how to deal with file format %d\n", | |
349 | whoami, file_format); | |
350 | done(1); | |
351 | } /* if */ | |
352 | } /* gmon_out_write */ | |
353 | ||
354 | /*** gmon_out.c ***/ |