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
|
// build/run probes
// Copyright (C) 2005-2007 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 "session.h"
#include "util.h"
#include <cstdlib>
#include <fstream>
#include <sstream>
extern "C" {
#include "signal.h"
#include <sys/wait.h>
#include <pwd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
}
using namespace std;
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
// Clever hacks copied from vmware modules
o << "stap_check_gcc = $(shell if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then echo \"$(1)\"; else echo \"$(2)\"; fi)" << endl;
o << "stap_check_build = $(shell " << "set -x; " << " if $(CC) $(CPPFLAGS) $(CFLAGS_KERNEL) $(EXTRA_CFLAGS) $(CFLAGS) -DKBUILD_BASENAME=\\\"" << s.module_name << "\\\" -Werror -S -o /dev/null -xc $(1) > /dev/null ; then echo \"$(2)\"; else echo \"$(3)\"; fi)" << endl;
o << "SYSTEMTAP_RUNTIME = \"" << s.runtime_path << "\"" << endl;
// "autoconf" options go here
// enum hrtimer_mode renaming near 2.6.21; see tapsets.cxx hrtimer_derived_probe_group::emit_module_decls
string module_cflags = "CFLAGS_" + s.module_name + ".o";
o << module_cflags << " :=" << endl;
o << module_cflags << " += $(call stap_check_build, $(SYSTEMTAP_RUNTIME)/autoconf-hrtimer-rel.c, -DSTAPCONF_HRTIMER_REL,)" << endl;
o << module_cflags << " += $(call stap_check_build, $(SYSTEMTAP_RUNTIME)/autoconf-inode-private.c, -DSTAPCONF_INODE_PRIVATE,)" << endl;
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;
// XXX: unfortunately, -save-temps can't work since linux kbuild cwd
// is not writeable.
//
// if (s.keep_tmpdir)
// o << "CFLAGS += -fverbose-asm -save-temps" << 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;
// XXX: this may help ppc toc overflow
// o << "CFLAGS := $(subst -Os,-O2,$(CFLAGS)) -fminimal-toc" << endl;
o << "obj-m := " << s.module_name << ".o" << endl;
o.close ();
// Generate module directory pathname and make sure it exists.
string module_dir = string("/lib/modules/")
+ s.kernel_release + "/build";
struct stat st;
rc = stat(module_dir.c_str(), &st);
if (rc != 0)
{
clog << "Module directory " << module_dir << " check failed: "
<< strerror(errno) << endl
<< "Make sure kernel devel is installed." << endl;
return rc;
}
// Before running make, fix up the environment a bit. PATH should
// already be overridden. Clean out a few variables that
// /lib/modules/${KVER}/build/Makefile uses.
rc = unsetenv("ARCH") || unsetenv("KBUILD_EXTMOD")
|| unsetenv("CROSS_COMPILE") || unsetenv("KBUILD_IMAGE")
|| unsetenv("KCONFIG_CONFIG") || unsetenv("INSTALL_PATH");
if (rc)
{
const char* e = strerror (errno);
cerr << "unsetenv failed: " << e << endl;
}
// Run make
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 staprun
string staprun_cmd = string(BINDIR) + "/staprun "
+ (s.verbose>1 ? "-v " : "")
+ (s.verbose>2 ? "-v " : "")
+ (s.output_file.empty() ? "" : "-o " + s.output_file + " ");
staprun_cmd += "-d " + stringify(getpid()) + " ";
if (s.cmd != "")
staprun_cmd += "-c \"" + s.cmd + "\" ";
if (s.target_pid)
staprun_cmd += "-t " + stringify(s.target_pid) + " ";
if (s.buffer_size)
staprun_cmd += "-b " + stringify(s.buffer_size) + " ";
staprun_cmd += s.tmpdir + "/" + s.module_name + ".ko";
if (s.verbose>1) clog << "Running " << staprun_cmd << endl;
signal (SIGHUP, SIG_IGN);
signal (SIGINT, SIG_IGN);
rc = system (staprun_cmd.c_str ());
return rc;
}
|
