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// systemtap translator driver
// Copyright (C) 2005 Red Hat Inc.
//
// 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 <iostream>
#include <fstream>
#include <sstream>
extern "C" {
#include <glob.h>
#include <unistd.h>
}
using namespace std;
void usage ()
{
cerr << "SystemTap translator "
<< "(version " << VERSION << " built " << DATE << ")" << endl;
cerr << "Copyright (C) 2005 Red Hat, Inc." << endl;
cerr << "This is free software; see the source for copying conditions." << endl;
cerr << endl;
cerr << "Usage: stap [options] FILE [ARGS ...] \tRun script files." << endl;
cerr << " or: stap [options] -e PROGRAM [ARGS ...]\tRun script." << endl;
cerr << endl;
cerr << "Arguments:" << endl;
cerr << " --\tNo more options after this" << endl;
cerr << " -p NUM\tStop after pass NUM 1-3" << endl;
cerr << " \t(parse, elaborate, translate)" << endl;
cerr << " -I DIR\tLook in DIR for additional .stp script files." << endl;
cerr << " -o FILE\tSend translator output to file instead of stdout." << endl;
// XXX: other options:
// -s: safe mode
// -d: dump safety-related external references
exit (0);
}
int
main (int argc, char * const argv [])
{
int last_pass = 3; // -p NUM
string cmdline_script; // -e PROGRAM
string script_file; // FILE
bool have_script = false;
string output_file; // -o FILE
vector<string> include_path; // -I DIR
vector<string> args; // ARGS
while (true)
{
int grc = getopt (argc, argv, "p:I:e:o:");
if (grc < 0)
break;
switch (grc)
{
case 'p':
last_pass = atoi (optarg);
if (last_pass < 1 || last_pass > 3)
{
cerr << "Invalid pass number." << endl;
usage ();
}
break;
case 'I':
include_path.push_back (string (optarg));
break;
case 'e':
if (have_script)
usage ();
cmdline_script = string (optarg);
have_script = true;
break;
case 'o':
if (output_file != "")
usage ();
output_file = string (optarg);
break;
case '?':
case 'h':
default:
usage ();
}
}
for (int i = optind; i < argc; i++)
{
if (! have_script)
{
script_file = string (argv[i]);
have_script = true;
}
else
args.push_back (string (argv[i]));
}
// need a user file
if (! have_script)
usage();
// arguments parsed; get down to business
int rc = 0;
systemtap_session s;
if (output_file != "")
s.op = new translator_output (output_file);
else
s.op = new translator_output (cout);
// PASS 1a: PARSING USER SCRIPT
// XXX: pass args vector, so parser (or lexer?) can substitute
// $1..$NN with actual arguments
if (script_file == "-")
s.user_file = parser::parse (cin);
else if (script_file != "")
s.user_file = parser::parse (script_file);
else
{
istringstream ii (cmdline_script);
s.user_file = parser::parse (ii);
}
if (s.user_file == 0)
// syntax errors already printed
rc ++;
// PASS 1b: PARSING LIBRARY SCRIPTS
for (unsigned i=0; i<include_path.size(); i++)
{
glob_t globbuf;
string dir = include_path[i] + "/*.stp";
int r = glob(dir.c_str (), 0, NULL, & globbuf);
if (r == GLOB_NOSPACE || r == GLOB_ABORTED)
rc ++;
// GLOB_NOMATCH is acceptable
for (unsigned j=0; j<globbuf.gl_pathc; j++)
{
stapfile* f = parser::parse (globbuf.gl_pathv[j]);
if (f == 0)
rc ++;
else
s.library_files.push_back (f);
}
globfree (& globbuf);
}
if (last_pass == 1 && rc == 0)
{
s.op->line() << "# parse tree dump";
s.user_file->print (s.op->newline());
for (unsigned i=0; i<s.library_files.size(); i++)
s.library_files[i]->print (s.op->newline());
}
// PASS 2: ELABORATION
if (rc == 0 && last_pass > 1)
rc = semantic_pass (s);
if (last_pass == 2 && rc == 0)
{
s.op->line() << "# globals";
for (unsigned i=0; i<s.globals.size(); i++)
{
vardecl* v = s.globals[i];
v->printsig (s.op->newline());
}
s.op->newline() << "# functions";
for (unsigned i=0; i<s.functions.size(); i++)
{
functiondecl* f = s.functions[i];
f->printsig (s.op->newline());
}
s.op->newline() << "# probes";
for (unsigned i=0; i<s.probes.size(); i++)
{
derived_probe* p = s.probes[i];
p->printsig (s.op->newline());
}
}
// PASS 3: TRANSLATION
if (rc == 0 && last_pass > 2)
rc = translate_pass (s);
delete s.op;
return rc;
}
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