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// build/run probes
// Copyright (C) 2005, 2006 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 "buildrun.h"
#include <fstream>
#include <sstream>
extern "C" {
#include "signal.h"
#include <sys/wait.h>
#include <pwd.h>
}
using namespace std;
// return as quoted string, with at least '"' backslash-escaped
template <typename IN> inline string
lex_cast_qstring(IN const & in)
{
stringstream ss;
string out, out2;
if (!(ss << in))
throw runtime_error("bad lexical cast");
out = ss.str();
out2 += '"';
for (unsigned i=0; i<out.length(); i++)
{
if (out[i] == '"') // XXX others?
out2 += '\\';
out2 += out[i];
}
out2 += '"';
return out2;
}
template <typename T>
static string
stringify(T t)
{
ostringstream s;
s << t;
return s.str ();
}
int
compile_pass (systemtap_session& s)
{
// fill in a quick Makefile
string makefile_nm = s.tmpdir + "/Makefile";
ofstream o (makefile_nm.c_str());
int rc = 0;
// Create makefile
for (unsigned i=0; i<s.macros.size(); i++)
o << "CFLAGS += -D " << lex_cast_qstring(s.macros[i]) << endl;
if (s.verbose > 2)
o << "CFLAGS += -ftime-report -Q" << endl;
o << "CFLAGS += -freorder-blocks" << endl; // improve on -Os
// o << "CFLAGS += -fno-unit-at-a-time" << endl;
// Assumes linux 2.6 kbuild
o << "CFLAGS += -Wno-unused -Werror" << endl;
o << "CFLAGS += -I\"" << s.runtime_path << "\"" << endl;
o << "obj-m := " << s.module_name << ".o" << endl;
o.close ();
// Run make
string module_dir = string("/lib/modules/")
+ s.kernel_release + "/build";
string make_cmd = string("make")
+ string (" -C \"") + module_dir + string("\"");
make_cmd += string(" M=\"") + s.tmpdir + string("\" modules");
if (s.verbose > 1)
make_cmd += " V=1";
else
make_cmd += " -s >/dev/null 2>&1";
if (s.verbose > 1) clog << "Running " << make_cmd << endl;
rc = system (make_cmd.c_str());
return rc;
}
int
run_pass (systemtap_session& s)
{
int rc = 0;
struct passwd *pw = getpwuid(getuid());
string username = string(pw->pw_name);
// for now, just spawn stpd
string stpd_cmd = string("sudo ")
+ string(PKGLIBDIR) + "/stpd "
+ (s.bulk_mode ? "" : "-r ")
+ (s.verbose>1 ? "" : "-q ")
+ "-u " + username + " "
+ (s.output_file.empty() ? "" : "-o " + s.output_file + " ");
stpd_cmd += "-d " + stringify(getpid()) + " ";
if (s.cmd != "")
stpd_cmd += "-c \"" + s.cmd + "\" ";
if (s.target_pid)
stpd_cmd += "-t " + stringify(s.target_pid) + " ";
if (s.buffer_size)
stpd_cmd += "-b " + stringify(s.buffer_size) + " ";
stpd_cmd += s.tmpdir + "/" + s.module_name + ".ko";
if (s.verbose>1) clog << "Running " << stpd_cmd << endl;
signal (SIGHUP, SIG_IGN);
signal (SIGINT, SIG_IGN);
rc = system (stpd_cmd.c_str ());
return rc;
}
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