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main.cxx
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// systemtap translator/driver
// Copyright (C) 2005-2019 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 "cscommon.h"
#include "csclient.h"
#include "client-nss.h"
#include "remote.h"
#include "tapsets.h"
#include "setupdwfl.h"
#ifdef HAVE_LIBREADLINE
#include "interactive.h"
#endif
#if HAVE_LANGUAGE_SERVER_SUPPORT
#include "language-server/stap-language-server.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>
#include <fcntl.h>
#include <sys/wait.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)
{
std::string pp;
// probe name or alias
if (s.dump_mode == systemtap_session::dump_matched_probes_vars && isatty(STDOUT_FILENO))
pp = s.colorize(it->first, "source");
else
pp = 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);
}
// If verbosity is set, we want to print out all instances of duplicated probes and
// distinguish them with the PC address.
if (s.verbose > 0)
{
// We want to print the probe point signature (without the nested components).
std::ostringstream sig;
p->printsig_nonest(sig);
if (s.verbose > 1)
p->printsig_nested(sig);
if (s.dump_mode == systemtap_session::dump_matched_probes_vars && isatty(STDOUT_FILENO))
o << s.colorize(sig.str(), "source");
else
o << sig.str();
for (list<string>::iterator ir=var_list.begin(); ir!=var_list.end(); ++ir)
o << " " << *ir;
for (list<string>::iterator ir=arg_list.begin(); ir!=arg_list.end(); ++ir)
o << " " << *ir;
o << endl;
arg_list.clear();
var_list.clear();
}
}
if (!(s.verbose > 0))
{
uniq_list(arg_list);
uniq_list(var_list);
o << pp;
// 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
{
o << pp;
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)
{
o << "{ ";
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)
{
o << "{ ";
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 fd = 2;
/* NB: writing to stderr blockingly in a signal handler is dangerous
* since it may prevent the stap process from quitting gracefully
* on receiving SIGTERM/etc signals when the stderr write buffer
* is full. PR23891 */
int flags = fcntl(fd, F_GETFL);
if (flags == -1)
_exit (1);
if (!(flags & O_NONBLOCK))
{
if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == 0) {
int rc = write (fd, msg, sizeof(msg)-1);
if (rc)
{
/* Do nothing; we don't care if our last gasp went out. */
;
}
}
} /* if ! O_NONBLOCK */
/* to avoid leaving any side-effects on the stderr device */
(void) fcntl(fd, F_SETFL, flags & ~O_NONBLOCK);
_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, double fp1, float fp2)
{
PROBE(stap, benchmark__thread__start);
fp1 += 0.0;
fp2 += 0.0;
double fp_local1 = 1.01;
float fp_local2 = 2.02;
PROBE2(stap, benchmark__fp, fp1+fp_local1, fp2+fp_local2);
double fp_local3 = 3.03;
double fp_local4 = 4.04;
double fp_local5 = 5.05;
double fp_local6 = 6.06;
double fp_local7 = 7.07;
double fp_local8 = 8.08;
double fp_local9 = 9.09;
double fp_local10 = 10.01;
double fp_local11 = 11.01;
double fp_local12 = 12.01;
double fp_local13 = 13.01;
double fp_local14 = 14.01;
double fp_local15 = 15.01;
fp_local1 += 0.0;
fp_local2 += 0.0;
fp_local3 += 0.0;
fp_local4 += 0.0;
fp_local5 += 0.0;
fp_local6 += 0.0;
fp_local7 += 0.0;
fp_local8 += 0.0;
fp_local9 += 0.0;
fp_local10 += 0.0;
fp_local11 += 0.0;
fp_local12 += 0.0;
fp_local13 += 0.0;
fp_local14 += 0.0;
fp_local15 += 0.0;
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;
double f = 2.71828;
float f2 = 1.41421;
for (unsigned long i = 0; i < threads; ++i)
handles.push_back(thread(sdt_benchmark_thread, loops, f, f2));
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 main 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";
// Create the name of the C source file for the dumped symbol data
// within the temporary directory. This file will be generated in
// translate.cxx:emit_symbol_data()
s.symbols_source = string(s.tmpdir) + "/stap_symbols.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;
}
}