-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathmain.cxx
1460 lines (1278 loc) · 45.3 KB
/
main.cxx
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
// systemtap translator/driver
// Copyright (C) 2005-2018 Red Hat Inc.
// Copyright (C) 2005 IBM Corp.
// Copyright (C) 2006 Intel Corporation.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.
#include "config.h"
#include "staptree.h"
#include "parse.h"
#include "elaborate.h"
#include "translate.h"
#include "buildrun.h"
#include "session.h"
#include "hash.h"
#include "cache.h"
#include "util.h"
#include "coveragedb.h"
#include "rpm_finder.h"
#include "task_finder.h"
#include "csclient.h"
#include "client-nss.h"
#include "remote.h"
#include "tapsets.h"
#include "setupdwfl.h"
#ifdef HAVE_LIBREADLINE
#include "interactive.h"
#endif
#include "bpf.h"
#if ENABLE_NLS
#include <libintl.h>
#include <locale.h>
#endif
#include "stap-probe.h"
#include <cstdlib>
#include <thread>
#include <algorithm>
extern "C" {
#include <glob.h>
#include <unistd.h>
#include <signal.h>
#include <sys/utsname.h>
#include <sys/times.h>
#include <sys/time.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#include <wordexp.h>
#include <ftw.h>
}
using namespace std;
static void
uniq_list(list<string>& l)
{
set<string> s;
list<string>::iterator i = l.begin();
while (i != l.end())
if (s.insert(*i).second)
++i;
else
i = l.erase(i);
}
static void
printscript(systemtap_session& s, ostream& o)
{
if (s.dump_mode == systemtap_session::dump_matched_probes ||
s.dump_mode == systemtap_session::dump_matched_probes_vars)
{
// We go through some heroic measures to produce clean output.
// Record the alias and probe pointer as <name, set<derived_probe *> >
map<string,set<derived_probe *> > probe_list;
// Pre-process the probe alias
for (unsigned i=0; i<s.probes.size(); i++)
{
assert_no_interrupts();
derived_probe* p = s.probes[i];
vector<probe*> chain;
p->collect_derivation_chain (chain);
if (s.verbose > 2) {
p->printsig(cerr); cerr << endl;
cerr << "chain[" << chain.size() << "]:" << endl;
for (unsigned j=0; j<chain.size(); j++)
{
cerr << " [" << j << "]: " << endl;
cerr << "\tlocations[" << chain[j]->locations.size() << "]:" << endl;
for (unsigned k=0; k<chain[j]->locations.size(); k++)
{
cerr << "\t [" << k << "]: ";
chain[j]->locations[k]->print(cerr);
cerr << endl;
}
const probe_alias *a = chain[j]->get_alias();
if (a)
{
cerr << "\taliases[" << a->alias_names.size() << "]:" << endl;
for (unsigned k=0; k<a->alias_names.size(); k++)
{
cerr << "\t [" << k << "]: ";
a->alias_names[k]->print(cerr);
cerr << endl;
}
}
}
}
const string& pp = lex_cast(*p->script_location());
// PR16730: We should only list probes that can be traced back to the
// user's spec, not any auxiliary probes in the tapsets.
// Also, do not want to the probes that are from the additional
// scripts (-E SCRIPT) to be listed.
if (!s.is_primary_probe(p))
continue;
// Now duplicate-eliminate. An alias may have expanded to
// several actual derived probe points, but we only want to
// print the alias head name once.
probe_list[pp].insert(p);
}
// print probe name and variables if there
for (map<string, set<derived_probe *> >::iterator it=probe_list.begin(); it!=probe_list.end(); ++it)
{
// probe name or alias
if (s.dump_mode == systemtap_session::dump_matched_probes_vars && isatty(STDOUT_FILENO))
o << s.colorize(it->first, "source");
else
o << it->first;
// Print the locals and arguments for -L mode only
if (s.dump_mode == systemtap_session::dump_matched_probes_vars)
{
map<string,unsigned> var_count; // format <"name:type",count>
map<string,unsigned> arg_count;
list<string> var_list;
list<string> arg_list;
// traverse set<derived_probe *> to collect all locals and arguments
for (set<derived_probe *>::iterator ix=it->second.begin(); ix!=it->second.end(); ++ix)
{
derived_probe* p = *ix;
// collect available locals of the probe
for (unsigned j=0; j<p->locals.size(); j++)
{
stringstream tmps;
vardecl* v = p->locals[j];
v->printsig (tmps);
var_count[tmps.str()]++;
var_list.push_back(tmps.str());
}
// collect arguments of the probe if there
list<string> arg_set;
p->getargs(arg_set);
for (list<string>::iterator ia=arg_set.begin(); ia!=arg_set.end(); ++ia) {
arg_count[*ia]++;
arg_list.push_back(*ia);
}
}
uniq_list(arg_list);
uniq_list(var_list);
// print the set-intersection only
for (list<string>::iterator ir=var_list.begin(); ir!=var_list.end(); ++ir)
if (var_count.find(*ir)->second == it->second.size()) // print locals
o << " " << *ir;
for (list<string>::iterator ir=arg_list.begin(); ir!=arg_list.end(); ++ir)
if (arg_count.find(*ir)->second == it->second.size()) // print arguments
o << " " << *ir;
}
o << endl;
}
}
else
{
if (s.embeds.size() > 0)
o << _("# global embedded code") << endl;
for (unsigned i=0; i<s.embeds.size(); i++)
{
assert_no_interrupts();
embeddedcode* ec = s.embeds[i];
ec->print (o);
o << endl;
}
if (s.globals.size() > 0)
o << _("# globals") << endl;
for (unsigned i=0; i<s.globals.size(); i++)
{
assert_no_interrupts();
vardecl* v = s.globals[i];
v->printsig (o);
if (s.verbose && v->init)
{
o << " = ";
v->init->print(o);
}
o << endl;
}
if (s.functions.size() > 0)
o << _("# functions") << endl;
for (map<string,functiondecl*>::iterator it = s.functions.begin(); it != s.functions.end(); it++)
{
assert_no_interrupts();
functiondecl* f = it->second;
f->printsig (o);
o << endl;
if (f->locals.size() > 0)
o << _(" # locals") << endl;
for (unsigned j=0; j<f->locals.size(); j++)
{
vardecl* v = f->locals[j];
o << " ";
v->printsig (o);
o << endl;
}
if (s.verbose)
{
f->body->print (o);
o << endl;
}
}
if (s.probes.size() > 0)
o << _("# probes") << endl;
for (unsigned i=0; i<s.probes.size(); i++)
{
assert_no_interrupts();
derived_probe* p = s.probes[i];
p->printsig (o);
o << endl;
if (p->locals.size() > 0)
o << _(" # locals") << endl;
for (unsigned j=0; j<p->locals.size(); j++)
{
vardecl* v = p->locals[j];
o << " ";
v->printsig (o);
o << endl;
}
if (s.verbose)
{
p->body->print (o);
o << endl;
}
}
}
}
int pending_interrupts;
extern "C"
void handle_interrupt (int)
{
// This might be nice, but we don't know our current verbosity...
// clog << _F("Received signal %d", sig) << endl << flush;
kill_stap_spawn(SIGTERM);
pending_interrupts ++;
// Absorb the first two signals. This used to be one, but when
// stap is run under sudo, and then interrupted, sudo relays a
// redundant copy of the signal to stap, leading to an unclean shutdown.
if (pending_interrupts > 2) // XXX: should be configurable? time-based?
{
char msg[] = "Too many interrupts received, exiting.\n";
int rc = write (2, msg, sizeof(msg)-1);
if (rc) {/* Do nothing; we don't care if our last gasp went out. */ ;}
_exit (1);
}
}
void
setup_signals (sighandler_t handler)
{
struct sigaction sa;
memset(&sa, 0, sizeof(sa));
sa.sa_handler = handler;
sigemptyset (&sa.sa_mask);
if (handler != SIG_IGN)
{
sigaddset (&sa.sa_mask, SIGHUP);
sigaddset (&sa.sa_mask, SIGPIPE);
sigaddset (&sa.sa_mask, SIGINT);
sigaddset (&sa.sa_mask, SIGTERM);
sigaddset (&sa.sa_mask, SIGXFSZ);
sigaddset (&sa.sa_mask, SIGXCPU);
}
sa.sa_flags = SA_RESTART;
sigaction (SIGHUP, &sa, NULL);
sigaction (SIGPIPE, &sa, NULL);
sigaction (SIGINT, &sa, NULL);
sigaction (SIGTERM, &sa, NULL);
sigaction (SIGXFSZ, &sa, NULL);
sigaction (SIGXCPU, &sa, NULL);
}
static void
sdt_benchmark_thread(unsigned long i)
{
PROBE(stap, benchmark__thread__start);
while (i--)
PROBE1(stap, benchmark, i);
PROBE(stap, benchmark__thread__end);
}
static int
run_sdt_benchmark(systemtap_session& s)
{
unsigned long loops = s.benchmark_sdt_loops ?: 10000000;
unsigned long threads = s.benchmark_sdt_threads ?: 1;
if (s.verbose > 0)
clog << _F("Beginning SDT benchmark with %lu loops in %lu threads.",
loops, threads) << endl;
struct tms tms_before, tms_after;
struct timeval tv_before, tv_after;
unsigned _sc_clk_tck = sysconf (_SC_CLK_TCK);
times (& tms_before);
gettimeofday (&tv_before, NULL);
PROBE(stap, benchmark__start);
{
vector<thread> handles;
for (unsigned long i = 0; i < threads; ++i)
handles.push_back(thread(sdt_benchmark_thread, loops));
for (unsigned long i = 0; i < threads; ++i)
handles[i].join();
}
PROBE(stap, benchmark__end);
times (& tms_after);
gettimeofday (&tv_after, NULL);
if (s.verbose > 0)
clog << _F("Completed SDT benchmark in %ldusr/%ldsys/%ldreal ms.",
(long)(tms_after.tms_utime - tms_before.tms_utime) * 1000 / _sc_clk_tck,
(long)(tms_after.tms_stime - tms_before.tms_stime) * 1000 / _sc_clk_tck,
(long)((tv_after.tv_sec - tv_before.tv_sec) * 1000 +
((long)tv_after.tv_usec - (long)tv_before.tv_usec) / 1000))
<< endl;
return EXIT_SUCCESS;
}
static set<string> files;
static string path_dir;
static int collect_stp(const char* fpath, const struct stat*,
int typeflag, struct FTW* ftwbuf)
{
if (typeflag == FTW_F)
{
const char* ext = strrchr(fpath, '.');
if (ext && (strcmp(".stp", ext) == 0))
files.insert(fpath);
}
else if (typeflag == FTW_D && ftwbuf->level > 0)
{
// Only recurse for PATH root directory
if (strncmp(path_dir.c_str(), fpath, path_dir.size()) != 0 ||
(fpath[path_dir.size()] != '/' && fpath[path_dir.size()] != '\0'))
return FTW_SKIP_SUBTREE;
}
return FTW_CONTINUE;
}
static int collect_stpm(const char* fpath, const struct stat*,
int typeflag, struct FTW* ftwbuf)
{
if (typeflag == FTW_F)
{
const char* ext = strrchr(fpath, '.');
if (ext && (strcmp(".stpm", ext) == 0))
files.insert(fpath);
}
else if (typeflag == FTW_D && ftwbuf->level > 0)
{
// Only recurse for PATH root directory
if (strncmp(path_dir.c_str(), fpath, path_dir.size()) != 0 ||
(fpath[path_dir.size()] != '/' && fpath[path_dir.size()] != '\0'))
return FTW_SKIP_SUBTREE;
}
return FTW_CONTINUE;
}
#if !HAVE_BPF_DECLS
int
translate_bpf_pass (systemtap_session &)
{
return 1;
}
#endif
// Compilation passes 0 through 4
int
passes_0_4 (systemtap_session &s)
{
int rc = 0;
// If we don't know the release, there's no hope either locally or on a server.
if (s.kernel_release.empty())
{
if (s.kernel_build_tree.empty())
cerr << _("ERROR: kernel release isn't specified") << endl;
else
cerr << _F("ERROR: kernel release isn't found in \"%s\"",
s.kernel_build_tree.c_str()) << endl;
return 1;
}
// Perform passes 0 through 4 using a compile server?
if (! s.specified_servers.empty ())
{
#if NEED_BASE_CLIENT_CODE
compile_server_client client (s);
return client.passes_0_4 ();
#else
s.print_warning(_("Without NSS or HTTP client support, using a compile-server is not supported by this version of systemtap"));
// This cannot be an attempt to use a server after a local compile failed
// since --use-server-on-error is locked to 'no' if we don't have
// NSS.
assert (! s.try_server ());
s.print_warning(_("Ignoring --use-server"));
#endif
}
// PASS 0: setting up
s.verbose = s.perpass_verbose[0];
PROBE1(stap, pass0__start, &s);
// For PR1477, we used to override $PATH and $LC_ALL and other stuff
// here. We seem to use complete pathnames in
// buildrun.cxx/tapsets.cxx now, so this is not necessary. Further,
// it interferes with util.cxx:find_executable(), used for $PATH
// resolution.
s.kernel_base_release.assign(s.kernel_release, 0, s.kernel_release.find('-'));
// Update various paths to include the sysroot, if provided.
if (!s.sysroot.empty())
{
if (s.update_release_sysroot && !s.sysroot.empty())
s.kernel_build_tree = s.sysroot + s.kernel_build_tree;
debuginfo_path_insert_sysroot(s.sysroot);
}
// Now that no further changes to s.kernel_build_tree can occur, let's use it.
if (!s.runtime_usermode_p())
{
if ((rc = s.parse_kernel_config ()) != 0
|| (rc = s.parse_kernel_exports ()) != 0
|| (rc = s.parse_kernel_functions ()) != 0)
{
// Try again with a server
s.set_try_server ();
return rc;
}
}
// Create the name of the C source file within the temporary
// directory. Note the _src prefix, explained in
// buildrun.cxx:compile_pass()
s.translated_source = string(s.tmpdir) + "/" + s.module_name + "_src.c";
PROBE1(stap, pass0__end, &s);
struct tms tms_before;
times (& tms_before);
struct timeval tv_before;
gettimeofday (&tv_before, NULL);
// PASS 1a: PARSING LIBRARY SCRIPTS
PROBE1(stap, pass1a__start, &s);
// prep this array for tapset $n use too ... although we will reset once again for user scripts
s.used_args.resize(s.args.size(), false);
if (! s.pass_1a_complete)
{
// We need to handle the library scripts first because this pass
// gathers information on .stpm files that might be needed to
// parse the user script.
// We need to first ascertain the status of the user script, though.
struct stat user_file_stat;
int user_file_stat_rc = -1;
if (s.script_file == "-")
{
user_file_stat_rc = fstat (STDIN_FILENO, & user_file_stat);
}
else if (s.script_file != "")
{
if (s.run_example)
{
files.clear();
path_dir = string(PKGDATADIR) + "/examples";
(void) nftw(path_dir.c_str(), collect_stp, 1, FTW_ACTIONRETVAL);
vector<string> examples;
for (auto it = files.begin(); it != files.end(); ++it)
{
string::size_type last_slash_index = it->find_last_of('/');
string example_name = it->substr(last_slash_index + 1);
if (s.script_file == example_name)
examples.push_back(*it);
}
if (examples.size() > 1)
{
cerr << "Multiple examples found: " << endl;
for (auto it = examples.begin(); it != examples.end(); ++it)
cerr << " " << *it << endl;
return 1;
}
else if (examples.size() == 0)
{
cerr << _F("Example '%s' was not found under '%s'", s.script_file.c_str(), path_dir.c_str()) << endl;
return 1;
}
else
s.script_file = examples[0];
}
user_file_stat_rc = stat (s.script_file.c_str(), & user_file_stat);
}
// otherwise, rc is 0 for a command line script
vector<string> version_suffixes;
if (!s.runtime_usermode_p())
{
// Construct kernel-versioning search path
string kvr = s.kernel_release;
// add full kernel-version-release (2.6.NN-FOOBAR)
version_suffixes.push_back ("/" + kvr);
// add kernel version (2.6.NN)
if (kvr != s.kernel_base_release)
{
kvr = s.kernel_base_release;
version_suffixes.push_back ("/" + kvr);
}
// add kernel family (2.6)
string::size_type dot1_index = kvr.find ('.');
string::size_type dot2_index = kvr.rfind ('.');
while (dot2_index > dot1_index && dot2_index != string::npos)
{
kvr.erase(dot2_index);
version_suffixes.push_back ("/" + kvr);
dot2_index = kvr.rfind ('.');
}
}
// add empty string as last element
version_suffixes.push_back ("");
// Add arch variants of every path, just before each
const string& arch = s.architecture;
for (unsigned i=0; i<version_suffixes.size(); i+=2)
version_suffixes.insert(version_suffixes.begin() + i,
version_suffixes[i] + "/" + arch);
// Add runtime variants of every path, before everything else
string runtime_prefix;
if (s.runtime_mode == systemtap_session::kernel_runtime)
runtime_prefix = "/linux";
else if (s.runtime_mode == systemtap_session::dyninst_runtime)
runtime_prefix = "/dyninst";
else if (s.runtime_mode == systemtap_session::bpf_runtime)
runtime_prefix = "/bpf";
if (!runtime_prefix.empty())
for (unsigned i=0; i<version_suffixes.size(); i+=2)
version_suffixes.insert(version_suffixes.begin() + i/2,
runtime_prefix + version_suffixes[i]);
// First, parse .stpm files on the include path. We need to have the
// resulting macro definitions available for parsing library files,
// but since .stpm files can consist only of '@define' constructs,
// we can parse each one without reference to the others.
set<pair<dev_t, ino_t> > seen_library_macro_files;
set<string> seen_library_macro_files_names;
for (unsigned i=0; i<s.include_path.size(); i++)
{
// now iterate upon it
for (unsigned k=0; k<version_suffixes.size(); k++)
{
int flags = FTW_ACTIONRETVAL;
string dir = s.include_path[i] + version_suffixes[k];
files.clear();
// we need to set this for the nftw() callback
path_dir = s.include_path[i] + "/PATH";
(void) nftw(dir.c_str(), collect_stpm, 1, flags);
unsigned prev_s_library_files = s.library_files.size();
for (auto it = files.begin(); it != files.end(); ++it)
{
assert_no_interrupts();
struct stat tapset_file_stat;
int stat_rc = stat (it->c_str(), & tapset_file_stat);
if (stat_rc == 0 && user_file_stat_rc == 0 &&
user_file_stat.st_dev == tapset_file_stat.st_dev &&
user_file_stat.st_ino == tapset_file_stat.st_ino)
{
cerr
<< _F("usage error: macro tapset file '%s' cannot be run directly as a session script.",
it->c_str()) << endl;
rc ++;
}
// PR11949: duplicate-eliminate tapset files
if (stat_rc == 0)
{
pair<dev_t,ino_t> here = make_pair(tapset_file_stat.st_dev,
tapset_file_stat.st_ino);
if (seen_library_macro_files.find(here) != seen_library_macro_files.end())
{
if (s.verbose>2)
clog << _F("Skipping tapset \"%s\", duplicate inode.", it->c_str()) << endl;
continue;
}
seen_library_macro_files.insert (here);
}
// PR12443: duplicate-eliminate harder
string full_path = *it;
string tapset_base = s.include_path[i]; // not dir; it has arch suffixes too
if (full_path.size() > tapset_base.size())
{
string tail_part = full_path.substr(tapset_base.size());
if (seen_library_macro_files_names.find (tail_part) != seen_library_macro_files_names.end())
{
if (s.verbose>2)
clog << _F("Skipping tapset \"%s\", duplicate name.", it->c_str()) << endl;
continue;
}
seen_library_macro_files_names.insert (tail_part);
}
if (s.verbose>2)
clog << _F("Processing tapset \"%s\"", it->c_str()) << endl;
stapfile* f = parse_library_macros (s, *it);
if (f == 0)
s.print_warning(_F("macro tapset \"%s\" has errors, and will be skipped.", it->c_str()));
else
s.library_files.push_back (f);
}
unsigned next_s_library_files = s.library_files.size();
if (s.verbose>1 && !files.empty())
//TRANSLATORS: Searching through directories, 'processed' means 'examined so far'
clog << _F("Searched for library macro files: \"%s\", found: %zu, processed: %u",
dir.c_str(), files.size(),
(next_s_library_files-prev_s_library_files)) << endl;
}
}
// Next, gather and parse the library files.
set<pair<dev_t, ino_t> > seen_library_files;
set<string> seen_library_files_names;
for (unsigned i=0; i<s.include_path.size(); i++)
{
// now iterate upon it
for (unsigned k=0; k<version_suffixes.size(); k++)
{
int flags = FTW_ACTIONRETVAL;
string dir = s.include_path[i] + version_suffixes[k];
files.clear();
// we need to set this for the nftw() callback
path_dir = s.include_path[i] + "/PATH";
(void) nftw(dir.c_str(), collect_stp, 1, flags);
unsigned prev_s_library_files = s.library_files.size();
for (auto it = files.begin(); it != files.end(); ++it)
{
unsigned tapset_flags = pf_guru | pf_squash_errors;
// The first path is special, as it's the builtin tapset.
// Allow all features no matter what s.compatible says.
if (i == 0)
tapset_flags |= pf_no_compatible;
if (it->find("/PATH/") != string::npos)
tapset_flags |= pf_auto_path;
assert_no_interrupts();
struct stat tapset_file_stat;
int stat_rc = stat (it->c_str(), & tapset_file_stat);
if (stat_rc == 0 && user_file_stat_rc == 0 &&
user_file_stat.st_dev == tapset_file_stat.st_dev &&
user_file_stat.st_ino == tapset_file_stat.st_ino)
{
cerr
<< _F("usage error: tapset file '%s' cannot be run directly as a session script.",
it->c_str()) << endl;
rc ++;
}
// PR11949: duplicate-eliminate tapset files
if (stat_rc == 0)
{
pair<dev_t,ino_t> here = make_pair(tapset_file_stat.st_dev,
tapset_file_stat.st_ino);
if (seen_library_files.find(here) != seen_library_files.end())
{
if (s.verbose>2)
clog << _F("Skipping tapset \"%s\", duplicate inode.", it->c_str()) << endl;
continue;
}
seen_library_files.insert (here);
}
// PR12443: duplicate-eliminate harder
string full_path = *it;
string tapset_base = s.include_path[i]; // not dir; it has arch suffixes too
if (full_path.size() > tapset_base.size())
{
string tail_part = full_path.substr(tapset_base.size());
if (seen_library_files_names.find (tail_part) != seen_library_files_names.end())
{
if (s.verbose>2)
clog << _F("Skipping tapset \"%s\", duplicate name.", it->c_str()) << endl;
continue;
}
seen_library_files_names.insert (tail_part);
}
if (s.verbose>2)
clog << _F("Processing tapset \"%s\"", it->c_str()) << endl;
// NB: we don't need to restrict privilege only for
// /usr/share/systemtap, i.e., excluding
// user-specified $XDG_DATA_DIRS. That's because
// stapdev gets root-equivalent privileges anyway;
// stapsys and stapusr use a remote compilation with
// a trusted environment, where client-side
// $XDG_DATA_DIRS are not passed.
stapfile* f = parse (s, *it, tapset_flags);
if (f == 0)
s.print_warning(_F("tapset \"%s\" has errors, and will be skipped", it->c_str()));
else
{
assert (f->privileged);
s.library_files.push_back (f);
}
}
unsigned next_s_library_files = s.library_files.size();
if (s.verbose>1 && !files.empty())
//TRANSLATORS: Searching through directories, 'processed' means 'examined so far'
clog << _F("Searched: \"%s\", found: %zu, processed: %u",
dir.c_str(), files.size(),
(next_s_library_files-prev_s_library_files)) << endl;
}
}
if (s.num_errors())
rc ++;
// Now that we've made it through pass 1a, remember this so we
// don't have to do this again in interactive mode. This doesn't
// effect non-interactive mode.
s.pass_1a_complete = true;
}
// PASS 1b: PARSING USER SCRIPT
PROBE1(stap, pass1b__start, &s);
// reset for user scripts -- it's their use of $* we care about
// except that tapsets like argv.stp can consume $parms
fill(s.used_args.begin(), s.used_args.end(), false);
// Only try to parse a user script if the user provided one, or if we have to
// make one (as is the case for listing mode). Otherwise, s.user_script
// remains NULL.
if (!s.script_file.empty() ||
!s.cmdline_script.empty() ||
s.dump_mode == systemtap_session::dump_matched_probes ||
s.dump_mode == systemtap_session::dump_matched_probes_vars)
{
unsigned user_flags = s.guru_mode ? pf_guru : 0;
user_flags |= pf_user_file;
if (s.script_file == "-")
{
if (s.stdin_script.str().empty())
s.stdin_script << cin.rdbuf();
s.user_files.push_back (parse (s, "<input>", s.stdin_script,
user_flags));
}
else if (s.script_file != "")
{
s.user_files.push_back (parse (s, s.script_file, user_flags));
}
else if (s.cmdline_script != "")
{
istringstream ii (s.cmdline_script);
s.user_files.push_back(parse (s, "<input>", ii, user_flags));
}
else // listing mode
{
istringstream ii ("probe " + s.dump_matched_pattern + " {}");
s.user_files.push_back (parse (s, "<input>", ii, user_flags));
}
// parses the additional script(s) (-E script). does so even if in listing
// mode, incase there is something special in the additional script(s),
// like a macro or alias. give them a unique name to differentiate the
// scripts that were inputted.
unsigned count = 1;
for (vector<string>::iterator script = s.additional_scripts.begin(); script != s.additional_scripts.end(); script++)
{
string input_name = "<input" + lex_cast(count) + ">";
istringstream ii (*script);
s.user_files.push_back(parse (s, input_name, ii, user_flags));
count ++;
}
for(vector<stapfile*>::iterator it = s.user_files.begin(); it != s.user_files.end(); it++)
{
if (!(*it))
{
// Syntax errors already printed.
rc ++;
}
}
}
else if (s.cmdline_script.empty() &&
s.dump_mode == systemtap_session::dump_none) // -e ''
{
cerr << _("Input file '<input>' is empty.") << endl;
rc++;
}
// Dump a list of probe aliases picked up, if requested
if (s.dump_mode == systemtap_session::dump_probe_aliases)
{
set<string> aliases;
vector<stapfile*>::const_iterator file;
for (file = s.library_files.begin();
file != s.library_files.end(); ++file)
{
vector<probe_alias*>::const_iterator alias;
for (alias = (*file)->aliases.begin();
alias != (*file)->aliases.end(); ++alias)
{
stringstream ss;
(*alias)->printsig(ss);
string str = ss.str();
if (!s.verbose && startswith(str, "_"))
continue;
aliases.insert(str);
}
}
set<string>::iterator alias;
for (alias = aliases.begin();
alias != aliases.end(); ++alias)
{
cout << *alias << endl;
}
}
// Dump the parse tree if this is the last pass
else if (rc == 0 && s.last_pass == 1)
{
cout << _("# parse tree dump") << endl;
for (vector<stapfile*>::iterator it = s.user_files.begin(); it != s.user_files.end(); it++)
(*it)->print (cout);
cout << endl;
if (s.verbose)
for (unsigned i=0; i<s.library_files.size(); i++)
{
s.library_files[i]->print (cout);
cout << endl;
}
}
struct tms tms_after;
times (& tms_after);
unsigned _sc_clk_tck = sysconf (_SC_CLK_TCK);
struct timeval tv_after;
gettimeofday (&tv_after, NULL);
#define TIMESPRINT _("in ") << \
(tms_after.tms_cutime + tms_after.tms_utime \
- tms_before.tms_cutime - tms_before.tms_utime) * 1000 / (_sc_clk_tck) << "usr/" \
<< (tms_after.tms_cstime + tms_after.tms_stime \
- tms_before.tms_cstime - tms_before.tms_stime) * 1000 / (_sc_clk_tck) << "sys/" \
<< ((tv_after.tv_sec - tv_before.tv_sec) * 1000 + \
((long)tv_after.tv_usec - (long)tv_before.tv_usec) / 1000) << "real ms."
// syntax errors, if any, are already printed
if (s.verbose)
{
// XXX also include a count of helper macro files loaded (.stpm)?
int n = int(s.library_files.size());
clog << _("Pass 1: parsed user script and ")
<< _NF("%d library script ", "%d library scripts ", n, n)
<< getmemusage()
<< TIMESPRINT
<< endl;
}
if (rc && !s.dump_mode)
cerr << _("Pass 1: parse failed. [man error::pass1]") << endl;
PROBE1(stap, pass1__end, &s);
assert_no_interrupts();
if (rc || s.last_pass == 1 ||
s.dump_mode == systemtap_session::dump_probe_aliases)
return rc;
times (& tms_before);
gettimeofday (&tv_before, NULL);
// PASS 2: ELABORATION
s.verbose = s.perpass_verbose[1];
PROBE1(stap, pass2__start, &s);
rc = semantic_pass (s);
// http handled probes need probe information from pass 2
if (! s.http_servers.empty ())
{
#if NEED_BASE_CLIENT_CODE
compile_server_client client (s);
return client.passes_0_4 ();
#else
s.print_warning(_("Without NSS or HTTP client support, using a compile-server is not supported by this version of systemtap"));
// This cannot be an attempt to use a server after a local compile failed
// since --use-server-on-error is locked to 'no' if we don't have
// NSS.
assert (! s.try_server ());
s.print_warning(_("Ignoring --use-server"));
#endif
}
// Dump a list of known probe point types, if requested.
if (s.dump_mode == systemtap_session::dump_probe_types)
s.pattern_root->dump (s);
// Dump a list of functions we picked up, if requested.
else if (s.dump_mode == systemtap_session::dump_functions)
{
map<string,functiondecl*>::const_iterator func;
for (func = s.functions.begin();
func != s.functions.end(); ++func)
{
functiondecl& curfunc = *func->second;
if (curfunc.synthetic)
continue;
if (!startswith(curfunc.name, "__global_"))
continue;
if (!s.verbose && startswith(curfunc.name, "__global__"))
continue;
curfunc.printsigtags(cout, s.verbose>0 /* all_tags */ );
cout << endl;
}
}
// Dump the whole script if requested, or if we stop at 2
else if (s.dump_mode == systemtap_session::dump_matched_probes ||
s.dump_mode == systemtap_session::dump_matched_probes_vars ||
(rc == 0 && s.last_pass == 2) ||
(rc != 0 && s.verbose > 2))
printscript(s, cout);
times (& tms_after);
gettimeofday (&tv_after, NULL);
if (s.verbose) {
int np = s.probes.size();
int nf = s.functions.size();