]>
Commit | Line | Data |
---|---|---|
f4b28491 | 1 | // build/run probes |
16bbba23 | 2 | // Copyright (C) 2005-2016 Red Hat Inc. |
f4b28491 FCE |
3 | // |
4 | // This file is part of systemtap, and is free software. You can | |
5 | // redistribute it and/or modify it under the terms of the GNU General | |
6 | // Public License (GPL); either version 2, or (at your option) any | |
7 | // later version. | |
8 | ||
9 | #include "config.h" | |
10 | #include "buildrun.h" | |
dc38c0ae | 11 | #include "session.h" |
72dbc915 | 12 | #include "util.h" |
7d26ee02 | 13 | #include "hash.h" |
a4b9c3b3 | 14 | #include "translate.h" |
f4b28491 | 15 | |
3b579393 | 16 | #include <cstdlib> |
f4b28491 | 17 | #include <fstream> |
d04cf5ff | 18 | #include <sstream> |
636e55b8 | 19 | #include <thread> |
d04cf5ff FCE |
20 | |
21 | extern "C" { | |
49abf162 | 22 | #include <signal.h> |
0c6296b2 | 23 | #include <sys/wait.h> |
70404fc5 | 24 | #include <pwd.h> |
0da3e7a0 | 25 | #include <grp.h> |
b40af7ee DS |
26 | #include <sys/types.h> |
27 | #include <sys/stat.h> | |
28 | #include <unistd.h> | |
29 | #include <string.h> | |
30 | #include <errno.h> | |
3c4476ac | 31 | #include <sys/resource.h> |
d04cf5ff FCE |
32 | } |
33 | ||
2537a880 JS |
34 | // A bit of obfuscation for Gentoo's sake. |
35 | // We *need* -Werror for stapconf to work correctly. | |
b586ab77 | 36 | // https://bugs.gentoo.org/show_bug.cgi?id=522908 |
2537a880 | 37 | #define WERROR ("-W" "error") |
f4b28491 FCE |
38 | |
39 | using namespace std; | |
40 | ||
6274464e JK |
41 | /* Adjust and run make_cmd to build a kernel module. */ |
42 | static int | |
ff520ff4 JS |
43 | run_make_cmd(systemtap_session& s, vector<string>& make_cmd, |
44 | bool null_out=false, bool null_err=false) | |
6274464e | 45 | { |
e19ebcf7 | 46 | assert_no_interrupts(); |
576acc1a | 47 | |
e8474d2a FCE |
48 | // PR14168: we used to unsetenv values here; instead do it via |
49 | // env(1) in make_any_make_cmd(). | |
6274464e | 50 | |
b51455af JS |
51 | // Disable ccache to avoid saving files that will never be reused. |
52 | // (ccache is useless to us, because our compiler commands always | |
53 | // include the randomized tmpdir path.) | |
54 | // It's not critical if this fails, so the return is ignored. | |
55 | (void) setenv("CCACHE_DISABLE", "1", 0); | |
56 | ||
b54581ce | 57 | if (s.verbose > 2) |
ff520ff4 | 58 | make_cmd.push_back("V=1"); |
b54581ce | 59 | else if (s.verbose > 1) |
ff520ff4 | 60 | make_cmd.push_back("--no-print-directory"); |
6274464e | 61 | else |
ff520ff4 JS |
62 | { |
63 | make_cmd.push_back("-s"); | |
64 | make_cmd.push_back("--no-print-directory"); | |
65 | } | |
dff50e09 | 66 | |
70fb16aa | 67 | // Exploit SMP parallelism, if available. |
636e55b8 | 68 | long smp = thread::hardware_concurrency(); |
3c4476ac FCE |
69 | if (smp <= 0) smp = 1; |
70 | // PR16276: but only if we're not running severely nproc-rlimited | |
71 | struct rlimit rlim; | |
72 | int rlimit_rc = getrlimit(RLIMIT_NPROC, &rlim); | |
5dd70393 | 73 | const unsigned int severely_limited = smp*30; // WAG at number of gcc+make etc. nested processes |
3c4476ac FCE |
74 | bool nproc_limited = (rlimit_rc == 0 && (rlim.rlim_max <= severely_limited || |
75 | rlim.rlim_cur <= severely_limited)); | |
76 | if (smp >= 1 && !nproc_limited) | |
70fb16aa | 77 | make_cmd.push_back("-j" + lex_cast(smp+1)); |
9fa0ffac | 78 | |
e0ccd368 FCE |
79 | if (strverscmp (s.kernel_base_release.c_str(), "2.6.29") < 0) |
80 | { | |
81 | // Older kernels, before linux commit #fd54f502841c1, include | |
82 | // gratuitous "echo"s in their Makefile. We need to suppress | |
83 | // that with this bluntness. | |
ff520ff4 | 84 | null_out = true; |
e0ccd368 FCE |
85 | } |
86 | ||
b13c6a37 | 87 | int rc = stap_system (s.verbose, "kbuild", make_cmd, null_out, null_err); |
3e1ec884 DB |
88 | if (rc != 0) |
89 | s.set_try_server (); | |
90 | return rc; | |
6274464e | 91 | } |
f4b28491 | 92 | |
7d26ee02 | 93 | static vector<string> |
8e0a2563 | 94 | make_any_make_cmd(systemtap_session& s, const string& dir, const string& target) |
7d26ee02 | 95 | { |
c2f14e64 JS |
96 | string newpath("PATH=/usr/bin:/bin"); |
97 | const char *oldpath = getenv("PATH"); | |
98 | if (oldpath != NULL) | |
99 | { | |
100 | newpath += ':'; | |
101 | newpath += oldpath; | |
102 | } | |
103 | ||
104 | vector<string> make_cmd | |
105 | { | |
106 | // PR14168: sanitize environment variables for kbuild invocation | |
107 | "env", "-uARCH", "-uKBUILD_EXTMOD", "-uCROSS_COMPILE", "-uKBUILD_IMAGE", | |
37a4150f | 108 | "-uKCONFIG_CONFIG", "-uINSTALL_PATH", "-uLD_LIBRARY_PATH", newpath, |
c2f14e64 JS |
109 | |
110 | "make", "-C", s.kernel_build_tree, | |
111 | "M=" + dir, // need make-quoting? | |
112 | target, | |
113 | ||
114 | // PR13847: suppress debuginfo creation by default | |
115 | "CONFIG_DEBUG_INFO=", | |
116 | ||
117 | // RHBZ1321628: suppress stack validation; expected to be temporary | |
118 | "CONFIG_STACK_VALIDATION=", | |
119 | }; | |
7d26ee02 JS |
120 | |
121 | // Add architecture, except for old powerpc (RHBZ669082) | |
122 | if (s.architecture != "powerpc" || | |
123 | (strverscmp (s.kernel_base_release.c_str(), "2.6.15") >= 0)) | |
124 | make_cmd.push_back("ARCH=" + s.architecture); // need make-quoting? | |
125 | ||
126 | // Add any custom kbuild flags | |
127 | make_cmd.insert(make_cmd.end(), s.kbuildflags.begin(), s.kbuildflags.end()); | |
128 | ||
129 | return make_cmd; | |
130 | } | |
131 | ||
8e0a2563 JS |
132 | static vector<string> |
133 | make_make_cmd(systemtap_session& s, const string& dir) | |
134 | { | |
135 | return make_any_make_cmd(s, dir, "modules"); | |
136 | } | |
137 | ||
138 | static vector<string> | |
139 | make_make_objs_cmd(systemtap_session& s, const string& dir) | |
140 | { | |
141 | // Kbuild uses these rules to build external modules: | |
142 | // | |
143 | // module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
144 | // modules: $(module-dirs) | |
145 | // @$(kecho) ' Building modules, stage 2.'; | |
146 | // $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost | |
147 | // | |
148 | // So if we're only interested in the stage 1 objects, we can | |
149 | // cheat and make only the $(module-dirs) part. | |
150 | return make_any_make_cmd(s, dir, "_module_" + dir); | |
151 | } | |
152 | ||
de0db58a JS |
153 | static void |
154 | output_autoconf(systemtap_session& s, ofstream& o, const char *autoconf_c, | |
155 | const char *deftrue, const char *deffalse) | |
156 | { | |
157 | o << "\t"; | |
158 | if (s.verbose < 4) | |
159 | o << "@"; | |
2ba1736a | 160 | o << "if $(CHECK_BUILD) $(SYSTEMTAP_RUNTIME)/linux/" << autoconf_c; |
de0db58a JS |
161 | if (s.verbose < 5) |
162 | o << " > /dev/null 2>&1"; | |
163 | o << "; then "; | |
164 | if (deftrue) | |
165 | o << "echo \"#define " << deftrue << " 1\""; | |
166 | if (deffalse) | |
167 | o << "; else echo \"#define " << deffalse << " 1\""; | |
168 | o << "; fi >> $@" << endl; | |
169 | } | |
170 | ||
9e62f7ba FCE |
171 | |
172 | void output_exportconf(systemtap_session& s, ofstream& o, const char *symbol, | |
173 | const char *deftrue) | |
e25ab03c | 174 | { |
9e62f7ba FCE |
175 | o << "\t"; |
176 | if (s.verbose < 4) | |
177 | o << "@"; | |
178 | if (s.kernel_exports.find(symbol) != s.kernel_exports.end()) | |
179 | o << "echo \"#define " << deftrue << " 1\""; | |
180 | o << ">> $@" << endl; | |
e25ab03c WH |
181 | } |
182 | ||
9e62f7ba | 183 | |
08c29612 DS |
184 | void output_dual_exportconf(systemtap_session& s, ofstream& o, |
185 | const char *symbol1, const char *symbol2, | |
186 | const char *deftrue) | |
187 | { | |
188 | o << "\t"; | |
189 | if (s.verbose < 4) | |
190 | o << "@"; | |
191 | if (s.kernel_exports.find(symbol1) != s.kernel_exports.end() | |
192 | && s.kernel_exports.find(symbol2) != s.kernel_exports.end()) | |
193 | o << "echo \"#define " << deftrue << " 1\""; | |
194 | o << ">> $@" << endl; | |
195 | } | |
196 | ||
197 | ||
13128684 JS |
198 | void output_either_exportconf(systemtap_session& s, ofstream& o, |
199 | const char *symbol1, const char *symbol2, | |
200 | const char *deftrue) | |
201 | { | |
202 | o << "\t"; | |
203 | if (s.verbose < 4) | |
204 | o << "@"; | |
205 | if (s.kernel_exports.find(symbol1) != s.kernel_exports.end() | |
206 | || s.kernel_exports.find(symbol2) != s.kernel_exports.end()) | |
207 | o << "echo \"#define " << deftrue << " 1\""; | |
208 | o << ">> $@" << endl; | |
209 | } | |
210 | ||
211 | ||
3a894f7e JS |
212 | static int |
213 | compile_dyninst (systemtap_session& s) | |
214 | { | |
4441e344 | 215 | const string module = s.tmpdir + "/" + s.module_filename(); |
3a894f7e | 216 | |
c2f14e64 JS |
217 | vector<string> cmd |
218 | { | |
219 | "gcc", "--std=gnu99", s.translated_source, "-o", module, | |
220 | "-fvisibility=hidden", "-O2", "-I" + s.runtime_path, "-D__DYNINST__", | |
221 | "-Wall", WERROR, "-Wno-unused", "-Wno-strict-aliasing", | |
222 | "-pthread", "-lrt", "-fPIC", "-shared", | |
223 | }; | |
ba2daa43 FCE |
224 | |
225 | // BZ855981/948279. Since dyninst/runtime.h includes __sync_* calls, | |
226 | // the compiler may generate different code for it depending on -march. | |
227 | // For example, if the default is i386, we may get references to auxiliary | |
228 | // functions like __sync_add_and_fetch_4, which appear to be defined | |
229 | // nowhere. We hack around this problem thusly: | |
230 | if (s.architecture == "i386") | |
e1c3538b | 231 | cmd.push_back("-march=i586"); |
ba2daa43 | 232 | |
8140a78d JS |
233 | for (size_t i = 0; i < s.c_macros.size(); ++i) |
234 | cmd.push_back("-D" + s.c_macros[i]); | |
c2f14e64 | 235 | |
8140a78d | 236 | if (s.verbose > 3) |
c2f14e64 | 237 | cmd.insert(cmd.end(), { "-ftime-report", "-Q" }); |
3a894f7e | 238 | |
16bbba23 FCE |
239 | // Add any custom kbuild flags |
240 | cmd.insert(cmd.end(), s.kbuildflags.begin(), s.kbuildflags.end()); | |
241 | ||
6da8678d | 242 | int rc = stap_system (s.verbose, cmd); |
3a894f7e JS |
243 | if (rc) |
244 | s.set_try_server (); | |
245 | return rc; | |
246 | } | |
3a894f7e JS |
247 | |
248 | ||
f4b28491 FCE |
249 | int |
250 | compile_pass (systemtap_session& s) | |
251 | { | |
ac3af990 | 252 | if (s.runtime_usermode_p()) |
4441e344 | 253 | return compile_dyninst (s); |
3a894f7e | 254 | |
db3a383b JK |
255 | int rc = uprobes_pass (s); |
256 | if (rc) | |
3e1ec884 DB |
257 | { |
258 | s.set_try_server (); | |
259 | return rc; | |
260 | } | |
db3a383b | 261 | |
f4b28491 | 262 | // fill in a quick Makefile |
92ade41d FCE |
263 | string makefile_nm = s.tmpdir + "/Makefile"; |
264 | ofstream o (makefile_nm.c_str()); | |
92ade41d FCE |
265 | |
266 | // Create makefile | |
ed10c639 | 267 | |
255e4c68 | 268 | // Clever hacks copied from vmware modules |
ecf19454 FCE |
269 | string superverbose; |
270 | if (s.verbose > 3) | |
271 | superverbose = "set -x;"; | |
522518f1 | 272 | |
e9737939 MM |
273 | string redirecterrors = "> /dev/null 2>&1"; |
274 | if (s.verbose > 6) | |
275 | redirecterrors = ""; | |
276 | ||
e5976ba0 MH |
277 | // Support O= (or KBUILD_OUTPUT) option |
278 | o << "_KBUILD_CFLAGS := $(call flags,KBUILD_CFLAGS)" << endl; | |
279 | ||
2537a880 JS |
280 | o << "stap_check_gcc = $(shell " << superverbose |
281 | << " if $(CC) $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1; then " | |
282 | << "echo \"$(1)\"; else echo \"$(2)\"; fi)" << endl; | |
283 | o << "CHECK_BUILD := $(CC) $(NOSTDINC_FLAGS) $(KBUILD_CPPFLAGS) $(CPPFLAGS) " | |
284 | << "$(LINUXINCLUDE) $(_KBUILD_CFLAGS) $(CFLAGS_KERNEL) $(EXTRA_CFLAGS) " | |
285 | << "$(CFLAGS) -DKBUILD_BASENAME=\\\"" << s.module_name << "\\\" " | |
286 | << WERROR << " -S -o /dev/null -xc " << endl; | |
287 | o << "stap_check_build = $(shell " << superverbose << " if $(CHECK_BUILD) $(1) " | |
288 | << redirecterrors << " ; then echo \"$(2)\"; else echo \"$(3)\"; fi)" << endl; | |
255e4c68 FCE |
289 | |
290 | o << "SYSTEMTAP_RUNTIME = \"" << s.runtime_path << "\"" << endl; | |
291 | ||
292 | // "autoconf" options go here | |
293 | ||
18222191 FCE |
294 | // RHBZ 543529: early rhel6 kernels' module-signing kbuild logic breaks out-of-tree modules |
295 | o << "CONFIG_MODULE_SIG := n" << endl; | |
296 | ||
ecf19454 | 297 | string module_cflags = "EXTRA_CFLAGS"; |
522518f1 | 298 | o << module_cflags << " :=" << endl; |
84c4da88 FCE |
299 | |
300 | // XXX: This gruesome hack is needed on some kernels built with separate O=directory, | |
301 | // where files like 2.6.27 x86's asm/mach-*/mach_mpspec.h are not found on the cpp path. | |
302 | // This could be a bug in arch/x86/Makefile that names | |
303 | // mflags-y += -Iinclude/asm-x86/mach-default | |
304 | // but that path does not exist in an O= build tree. | |
305 | o << module_cflags << " += -Iinclude2/asm/mach-default" << endl; | |
18b13994 | 306 | o << module_cflags << " += -I" + s.kernel_build_tree << endl; |
d4393459 FCE |
307 | if (s.kernel_source_tree != "") |
308 | o << module_cflags << " += -I" + s.kernel_source_tree << endl; | |
ac4f2837 DS |
309 | for (unsigned i = 0; i < s.kernel_extra_cflags.size(); i++) |
310 | o << module_cflags << " += " + s.kernel_extra_cflags[i] << endl; | |
84c4da88 | 311 | |
6046b840 FCE |
312 | // NB: don't try |
313 | // o << module_cflags << " += -Iusr/include" << endl; | |
314 | // since such headers are cleansed of _KERNEL_ pieces that we need | |
315 | ||
de0db58a | 316 | o << "STAPCONF_HEADER := " << s.tmpdir << "/" << s.stapconf_name << endl; |
de0db58a | 317 | o << "$(STAPCONF_HEADER):" << endl; |
b03e7089 | 318 | o << "\t@> $@" << endl; |
de0db58a | 319 | output_autoconf(s, o, "autoconf-hrtimer-rel.c", "STAPCONF_HRTIMER_REL", NULL); |
86f726b7 | 320 | output_exportconf(s, o, "hrtimer_get_res", "STAPCONF_HRTIMER_GET_RES"); |
1d381a0d | 321 | output_autoconf(s, o, "autoconf-generated-compile.c", "STAPCONF_GENERATED_COMPILE", NULL); |
de0db58a JS |
322 | output_autoconf(s, o, "autoconf-hrtimer-getset-expires.c", "STAPCONF_HRTIMER_GETSET_EXPIRES", NULL); |
323 | output_autoconf(s, o, "autoconf-inode-private.c", "STAPCONF_INODE_PRIVATE", NULL); | |
8f888904 | 324 | output_autoconf(s, o, "autoconf-inode-rwsem.c", "STAPCONF_INODE_RWSEM", NULL); |
de0db58a | 325 | output_autoconf(s, o, "autoconf-constant-tsc.c", "STAPCONF_CONSTANT_TSC", NULL); |
de0db58a JS |
326 | output_autoconf(s, o, "autoconf-ktime-get-real.c", "STAPCONF_KTIME_GET_REAL", NULL); |
327 | output_autoconf(s, o, "autoconf-x86-uniregs.c", "STAPCONF_X86_UNIREGS", NULL); | |
328 | output_autoconf(s, o, "autoconf-nameidata.c", "STAPCONF_NAMEIDATA_CLEANUP", NULL); | |
08c29612 | 329 | output_dual_exportconf(s, o, "unregister_kprobes", "unregister_kretprobes", "STAPCONF_UNREGISTER_KPROBES"); |
766cee5f | 330 | output_autoconf(s, o, "autoconf-kprobe-symbol-name.c", "STAPCONF_KPROBE_SYMBOL_NAME", NULL); |
de0db58a JS |
331 | output_autoconf(s, o, "autoconf-real-parent.c", "STAPCONF_REAL_PARENT", NULL); |
332 | output_autoconf(s, o, "autoconf-uaccess.c", "STAPCONF_LINUX_UACCESS_H", NULL); | |
333 | output_autoconf(s, o, "autoconf-oneachcpu-retry.c", "STAPCONF_ONEACHCPU_RETRY", NULL); | |
334 | output_autoconf(s, o, "autoconf-dpath-path.c", "STAPCONF_DPATH_PATH", NULL); | |
b9197b0f JS |
335 | output_exportconf(s, o, "synchronize_kernel", "STAPCONF_SYNCHRONIZE_KERNEL"); |
336 | output_exportconf(s, o, "synchronize_rcu", "STAPCONF_SYNCHRONIZE_RCU"); | |
08c29612 | 337 | output_exportconf(s, o, "synchronize_sched", "STAPCONF_SYNCHRONIZE_SCHED"); |
de0db58a | 338 | output_autoconf(s, o, "autoconf-task-uid.c", "STAPCONF_TASK_UID", NULL); |
ca89d289 | 339 | output_autoconf(s, o, "autoconf-from_kuid_munged.c", "STAPCONF_FROM_KUID_MUNGED", NULL); |
1c70d655 | 340 | output_exportconf(s, o, "get_mm_exe_file", "STAPCONF_GET_MM_EXE_FILE"); |
08c29612 | 341 | output_dual_exportconf(s, o, "alloc_vm_area", "free_vm_area", "STAPCONF_VM_AREA"); |
de0db58a | 342 | output_autoconf(s, o, "autoconf-procfs-owner.c", "STAPCONF_PROCFS_OWNER", NULL); |
b1f85b93 | 343 | output_autoconf(s, o, "autoconf-alloc-percpu-align.c", "STAPCONF_ALLOC_PERCPU_ALIGN", NULL); |
6ddf07ac JS |
344 | output_autoconf(s, o, "autoconf-x86-fs.c", "STAPCONF_X86_FS", NULL); |
345 | output_autoconf(s, o, "autoconf-x86-xfs.c", "STAPCONF_X86_XFS", NULL); | |
5cad2d3b | 346 | output_autoconf(s, o, "autoconf-x86-gs.c", "STAPCONF_X86_GS", NULL); |
f098eb6d | 347 | output_autoconf(s, o, "autoconf-grsecurity.c", "STAPCONF_GRSECURITY", NULL); |
450718c9 | 348 | output_autoconf(s, o, "autoconf-trace-printk.c", "STAPCONF_TRACE_PRINTK", NULL); |
be004140 FCE |
349 | output_autoconf(s, o, "autoconf-regset.c", "STAPCONF_REGSET", NULL); |
350 | output_autoconf(s, o, "autoconf-utrace-regset.c", "STAPCONF_UTRACE_REGSET", NULL); | |
23258335 | 351 | output_autoconf(s, o, "autoconf-uprobe-get-pc.c", "STAPCONF_UPROBE_GET_PC", NULL); |
85804472 | 352 | output_autoconf(s, o, "autoconf-hlist-4args.c", "STAPCONF_HLIST_4ARGS", NULL); |
b09417ad | 353 | output_exportconf(s, o, "tsc_khz", "STAPCONF_TSC_KHZ"); |
9e62f7ba | 354 | output_exportconf(s, o, "cpu_khz", "STAPCONF_CPU_KHZ"); |
031fda59 | 355 | output_exportconf(s, o, "__module_text_address", "STAPCONF_MODULE_TEXT_ADDRESS"); |
af6c651f | 356 | output_exportconf(s, o, "add_timer_on", "STAPCONF_ADD_TIMER_ON"); |
8d59b39f | 357 | |
08c29612 | 358 | output_dual_exportconf(s, o, "probe_kernel_read", "probe_kernel_write", "STAPCONF_PROBE_KERNEL"); |
b273669e MW |
359 | output_autoconf(s, o, "autoconf-hw_breakpoint_context.c", |
360 | "STAPCONF_HW_BREAKPOINT_CONTEXT", NULL); | |
8c5905d0 TM |
361 | output_autoconf(s, o, "autoconf-save-stack-trace.c", |
362 | "STAPCONF_KERNEL_STACKTRACE", NULL); | |
9957bbd2 MW |
363 | output_autoconf(s, o, "autoconf-save-stack-trace-no-bp.c", |
364 | "STAPCONF_KERNEL_STACKTRACE_NO_BP", NULL); | |
d5cd287f DS |
365 | output_autoconf(s, o, "autoconf-asm-syscall.c", |
366 | "STAPCONF_ASM_SYSCALL_H", NULL); | |
c145b9cb | 367 | output_autoconf(s, o, "autoconf-ring_buffer-flags.c", "STAPCONF_RING_BUFFER_FLAGS", NULL); |
0d0f0d84 | 368 | output_autoconf(s, o, "autoconf-ring_buffer_lost_events.c", "STAPCONF_RING_BUFFER_LOST_EVENTS", NULL); |
c38602b5 | 369 | output_autoconf(s, o, "autoconf-ring_buffer_read_prepare.c", "STAPCONF_RING_BUFFER_READ_PREPARE", NULL); |
03a4ec63 | 370 | output_autoconf(s, o, "autoconf-kallsyms-on-each-symbol.c", "STAPCONF_KALLSYMS_ON_EACH_SYMBOL", NULL); |
c265cd25 | 371 | output_autoconf(s, o, "autoconf-walk-stack.c", "STAPCONF_WALK_STACK", NULL); |
0bbb8009 JS |
372 | output_autoconf(s, o, "autoconf-stacktrace_ops-warning.c", |
373 | "STAPCONF_STACKTRACE_OPS_WARNING", NULL); | |
15de83a3 DS |
374 | output_autoconf(s, o, "autoconf-stacktrace_ops-int-address.c", |
375 | "STAPCONF_STACKTRACE_OPS_INT_ADDRESS", NULL); | |
18da5887 | 376 | output_autoconf(s, o, "autoconf-mm-context-vdso.c", "STAPCONF_MM_CONTEXT_VDSO", NULL); |
3b62d74b | 377 | output_autoconf(s, o, "autoconf-mm-context-vdso-base.c", "STAPCONF_MM_CONTEXT_VDSO_BASE", NULL); |
c1d2d085 | 378 | output_autoconf(s, o, "autoconf-blk-types.c", "STAPCONF_BLK_TYPES", NULL); |
aec17ca6 | 379 | output_autoconf(s, o, "autoconf-perf-structpid.c", "STAPCONF_PERF_STRUCTPID", NULL); |
2f3df331 MW |
380 | output_autoconf(s, o, "perf_event_counter_context.c", |
381 | "STAPCONF_PERF_COUNTER_CONTEXT", NULL); | |
382 | output_autoconf(s, o, "perf_probe_handler_nmi.c", | |
383 | "STAPCONF_PERF_HANDLER_NMI", NULL); | |
7f2d56c3 DS |
384 | output_exportconf(s, o, "path_lookup", "STAPCONF_PATH_LOOKUP"); |
385 | output_exportconf(s, o, "kern_path_parent", "STAPCONF_KERN_PATH_PARENT"); | |
386 | output_exportconf(s, o, "vfs_path_lookup", "STAPCONF_VFS_PATH_LOOKUP"); | |
33f02716 | 387 | output_exportconf(s, o, "kern_path", "STAPCONF_KERN_PATH"); |
b85e750d DS |
388 | output_exportconf(s, o, "proc_create_data", "STAPCONF_PROC_CREATE_DATA"); |
389 | output_exportconf(s, o, "PDE_DATA", "STAPCONF_PDE_DATA"); | |
2c9caccb | 390 | output_autoconf(s, o, "autoconf-module-sect-attrs.c", "STAPCONF_MODULE_SECT_ATTRS", NULL); |
04ffc218 | 391 | |
db7dcdff | 392 | output_autoconf(s, o, "autoconf-utrace-via-tracepoints.c", "STAPCONF_UTRACE_VIA_TRACEPOINTS", NULL); |
0e0e60b2 | 393 | output_autoconf(s, o, "autoconf-task_work-struct.c", "STAPCONF_TASK_WORK_STRUCT", NULL); |
abc69bab | 394 | output_autoconf(s, o, "autoconf-vm-area-pte.c", "STAPCONF_VM_AREA_PTE", NULL); |
56111fdc | 395 | output_autoconf(s, o, "autoconf-relay-umode_t.c", "STAPCONF_RELAY_UMODE_T", NULL); |
52dea427 | 396 | output_autoconf(s, o, "autoconf-fs_supers-hlist.c", "STAPCONF_FS_SUPERS_HLIST", NULL); |
fce34f35 | 397 | output_autoconf(s, o, "autoconf-compat_sigaction.c", "STAPCONF_COMPAT_SIGACTION", NULL); |
4d914c37 | 398 | output_autoconf(s, o, "autoconf-netfilter.c", "STAPCONF_NETFILTER_V313", NULL); |
7cfb10ec | 399 | output_autoconf(s, o, "autoconf-netfilter-313b.c", "STAPCONF_NETFILTER_V313B", NULL); |
502f3816 | 400 | output_autoconf(s, o, "autoconf-netfilter-4_1.c", "STAPCONF_NETFILTER_V41", NULL); |
2736131d | 401 | output_autoconf(s, o, "autoconf-netfilter-4_4.c", "STAPCONF_NETFILTER_V44", NULL); |
590a9ae1 | 402 | output_autoconf(s, o, "autoconf-smpcall-5args.c", "STAPCONF_SMPCALL_5ARGS", NULL); |
ceeaa82b | 403 | output_autoconf(s, o, "autoconf-smpcall-4args.c", "STAPCONF_SMPCALL_4ARGS", NULL); |
db7dcdff | 404 | |
de5f477b JS |
405 | // used by tapset/timestamp_monotonic.stp |
406 | output_exportconf(s, o, "cpu_clock", "STAPCONF_CPU_CLOCK"); | |
407 | output_exportconf(s, o, "local_clock", "STAPCONF_LOCAL_CLOCK"); | |
408 | ||
64e807c2 | 409 | // used by runtime/uprobe-inode.c |
13128684 JS |
410 | output_either_exportconf(s, o, "uprobe_register", "register_uprobe", |
411 | "STAPCONF_UPROBE_REGISTER_EXPORTED"); | |
412 | output_either_exportconf(s, o, "uprobe_unregister", "unregister_uprobe", | |
413 | "STAPCONF_UPROBE_UNREGISTER_EXPORTED"); | |
414 | output_autoconf(s, o, "autoconf-old-inode-uprobes.c", "STAPCONF_OLD_INODE_UPROBES", NULL); | |
79af55c3 | 415 | output_autoconf(s, o, "autoconf-inode-uretprobes.c", "STAPCONF_INODE_URETPROBES", NULL); |
39e63bae DS |
416 | |
417 | // used by tapsets.cxx inode uprobe generated code | |
418 | output_exportconf(s, o, "uprobe_get_swbp_addr", "STAPCONF_UPROBE_GET_SWBP_ADDR_EXPORTED"); | |
419 | ||
fe6feb40 | 420 | // used by runtime/loc2c-runtime.h |
64e807c2 FCE |
421 | output_exportconf(s, o, "task_user_regset_view", "STAPCONF_TASK_USER_REGSET_VIEW_EXPORTED"); |
422 | ||
36de3b61 DS |
423 | // used by runtime/stp_utrace.c |
424 | output_exportconf(s, o, "task_work_add", "STAPCONF_TASK_WORK_ADD_EXPORTED"); | |
d9d07e99 DS |
425 | output_exportconf(s, o, "wake_up_state", "STAPCONF_WAKE_UP_STATE_EXPORTED"); |
426 | output_exportconf(s, o, "try_to_wake_up", "STAPCONF_TRY_TO_WAKE_UP_EXPORTED"); | |
dfdbaa3d | 427 | output_exportconf(s, o, "signal_wake_up_state", "STAPCONF_SIGNAL_WAKE_UP_STATE_EXPORTED"); |
f346b8b3 DS |
428 | output_exportconf(s, o, "signal_wake_up", "STAPCONF_SIGNAL_WAKE_UP_EXPORTED"); |
429 | output_exportconf(s, o, "__lock_task_sighand", "STAPCONF___LOCK_TASK_SIGHAND_EXPORTED"); | |
36de3b61 | 430 | |
8fee9cc5 | 431 | output_autoconf(s, o, "autoconf-pagefault_disable.c", "STAPCONF_PAGEFAULT_DISABLE", NULL); |
15cf9503 | 432 | output_exportconf(s, o, "kallsyms_lookup_name", "STAPCONF_KALLSYMS"); |
85716315 | 433 | output_autoconf(s, o, "autoconf-uidgid.c", "STAPCONF_LINUX_UIDGID_H", NULL); |
4fe11374 | 434 | output_exportconf(s, o, "sigset_from_compat", "STAPCONF_SIGSET_FROM_COMPAT_EXPORTED"); |
42c2d1ed DS |
435 | output_exportconf(s, o, "vzalloc", "STAPCONF_VZALLOC"); |
436 | output_exportconf(s, o, "vzalloc_node", "STAPCONF_VZALLOC_NODE"); | |
c9c633a8 | 437 | output_exportconf(s, o, "vmalloc_node", "STAPCONF_VMALLOC_NODE"); |
8fee9cc5 | 438 | |
bbeb74db FCE |
439 | // RHBZ1233912 - s390 temporary workaround for non-atomic udelay() |
440 | output_exportconf(s, o, "udelay_simple", "STAPCONF_UDELAY_SIMPLE"); | |
441 | ||
3ef9830a | 442 | output_autoconf(s, o, "autoconf-tracepoint-strings.c", "STAPCONF_TRACEPOINT_STRINGS", NULL); |
bac8aa5a | 443 | output_autoconf(s, o, "autoconf-timerfd.c", "STAPCONF_TIMERFD_H", NULL); |
3ef9830a | 444 | |
3f040971 DS |
445 | output_autoconf(s, o, "autoconf-module_layout.c", |
446 | "STAPCONF_MODULE_LAYOUT", NULL); | |
64ffc49b DS |
447 | output_autoconf(s, o, "autoconf-mod_kallsyms.c", |
448 | "STAPCONF_MOD_KALLSYMS", NULL); | |
e7c42c3a | 449 | output_exportconf(s, o, "get_user_pages_remote", "STAPCONF_GET_USER_PAGES_REMOTE"); |
3f040971 | 450 | |
de0db58a | 451 | o << module_cflags << " += -include $(STAPCONF_HEADER)" << endl; |
5c54d49e | 452 | |
08fce398 SM |
453 | for (unsigned i=0; i<s.c_macros.size(); i++) |
454 | o << "EXTRA_CFLAGS += -D " << lex_cast_qstring(s.c_macros[i]) << endl; // XXX right quoting? | |
ed10c639 | 455 | |
e4c58386 | 456 | if (s.verbose > 3) |
0986ac38 | 457 | o << "EXTRA_CFLAGS += -ftime-report -Q" << endl; |
db22e55f | 458 | |
ee6dda6f | 459 | // XXX: unfortunately, -save-temps can't work since linux kbuild cwd |
100a540e | 460 | // is not writable. |
ee6dda6f FCE |
461 | // |
462 | // if (s.keep_tmpdir) | |
463 | // o << "CFLAGS += -fverbose-asm -save-temps" << endl; | |
464 | ||
ec6fdef5 MW |
465 | // Kernels can be compiled with CONFIG_CC_OPTIMIZE_FOR_SIZE to select |
466 | // -Os, otherwise -O2 is the default. | |
467 | o << "EXTRA_CFLAGS += -freorder-blocks" << endl; // improve on -Os | |
977b259e JS |
468 | |
469 | // Generate eh_frame for self-backtracing | |
470 | o << "EXTRA_CFLAGS += -fasynchronous-unwind-tables" << endl; | |
ec6fdef5 | 471 | |
01116596 MW |
472 | // We used to allow the user to override default optimization when so |
473 | // requested by adding a -O[0123s] so they could determine the | |
474 | // time/space/speed tradeoffs themselves, but we cannot guantantee that | |
475 | // the (un)optimized code actually compiles and/or generates functional | |
476 | // code, so we had to remove it. | |
477 | // o << "EXTRA_CFLAGS += " << s.gcc_flags << endl; // Add -O[0123s] | |
35d4ab18 FCE |
478 | |
479 | // o << "CFLAGS += -fno-unit-at-a-time" << endl; | |
dff50e09 | 480 | |
de4123d6 | 481 | // 256^W512 bytes should be enough for anybody |
01a2eba8 | 482 | // XXX this doesn't validate varargs, per gcc bug #41633 |
de4123d6 | 483 | o << "EXTRA_CFLAGS += $(call cc-option,-Wframe-larger-than=512)" << endl; |
730c3efc | 484 | |
c1e83543 FCE |
485 | // gcc 5.0.0-0.13.fc23 ipa-icf seems to consume gigacpu on stap-generated code |
486 | o << "EXTRA_CFLAGS += $(call cc-option,-fno-ipa-icf)" << endl; | |
487 | ||
cbfbbf69 | 488 | // Assumes linux 2.6 kbuild |
2537a880 | 489 | o << "EXTRA_CFLAGS += -Wno-unused " << WERROR << endl; |
29bdbdb1 FCE |
490 | #if CHECK_POINTER_ARITH_PR5947 |
491 | o << "EXTRA_CFLAGS += -Wpointer-arith" << endl; | |
492 | #endif | |
0986ac38 | 493 | o << "EXTRA_CFLAGS += -I\"" << s.runtime_path << "\"" << endl; |
4b2c4ab5 FCE |
494 | // XXX: this may help ppc toc overflow |
495 | // o << "CFLAGS := $(subst -Os,-O2,$(CFLAGS)) -fminimal-toc" << endl; | |
cbfbbf69 | 496 | o << "obj-m := " << s.module_name << ".o" << endl; |
f4b28491 | 497 | |
a4b9c3b3 FCE |
498 | // print out all the auxiliary source (->object) file names |
499 | o << s.module_name << "-y := "; | |
500 | for (unsigned i=0; i<s.auxiliary_outputs.size(); i++) | |
501 | { | |
80d74c6b | 502 | if (s.auxiliary_outputs[i]->trailer_p) continue; |
a4b9c3b3 FCE |
503 | string srcname = s.auxiliary_outputs[i]->filename; |
504 | assert (srcname != "" && srcname.rfind('/') != string::npos); | |
505 | string objname = srcname.substr(srcname.rfind('/')+1); // basename | |
506 | assert (objname != "" && objname[objname.size()-1] == 'c'); | |
507 | objname[objname.size()-1] = 'o'; // now objname | |
508 | o << " " + objname; | |
509 | } | |
510 | // and once again, for the translated_source file. It can't simply | |
511 | // be named MODULENAME.c, since kbuild doesn't allow a foo.ko file | |
512 | // consisting of multiple .o's to have foo.o/foo.c as a source. | |
513 | // (It uses ld -r -o foo.o EACH.o EACH.o). | |
514 | { | |
515 | string srcname = s.translated_source; | |
516 | assert (srcname != "" && srcname.rfind('/') != string::npos); | |
517 | string objname = srcname.substr(srcname.rfind('/')+1); // basename | |
518 | assert (objname != "" && objname[objname.size()-1] == 'c'); | |
519 | objname[objname.size()-1] = 'o'; // now objname | |
520 | o << " " + objname; | |
521 | } | |
80d74c6b FCE |
522 | // and once again, for the trailer type auxiliary outputs. |
523 | for (unsigned i=0; i<s.auxiliary_outputs.size(); i++) | |
524 | { | |
525 | if (! s.auxiliary_outputs[i]->trailer_p) continue; | |
526 | string srcname = s.auxiliary_outputs[i]->filename; | |
527 | assert (srcname != "" && srcname.rfind('/') != string::npos); | |
528 | string objname = srcname.substr(srcname.rfind('/')+1); // basename | |
529 | assert (objname != "" && objname[objname.size()-1] == 'c'); | |
530 | objname[objname.size()-1] = 'o'; // now objname | |
531 | o << " " + objname; | |
532 | } | |
a4b9c3b3 FCE |
533 | o << endl; |
534 | ||
535 | // add all stapconf dependencies | |
536 | o << s.translated_source << ": $(STAPCONF_HEADER)" << endl; | |
537 | for (unsigned i=0; i<s.auxiliary_outputs.size(); i++) | |
538 | o << s.auxiliary_outputs[i]->filename << ": $(STAPCONF_HEADER)" << endl; | |
539 | ||
540 | ||
ed10c639 FCE |
541 | o.close (); |
542 | ||
b40af7ee | 543 | // Generate module directory pathname and make sure it exists. |
4d34dac1 FCE |
544 | string module_dir = s.kernel_build_tree; |
545 | string module_dir_makefile = module_dir + "/Makefile"; | |
b40af7ee | 546 | struct stat st; |
4d34dac1 | 547 | rc = stat(module_dir_makefile.c_str(), &st); |
b40af7ee DS |
548 | if (rc != 0) |
549 | { | |
ce0f6648 | 550 | clog << _F("Checking \" %s \" failed with error: %s\nEnsure kernel development headers & makefiles are installed.", |
46a1a151 | 551 | module_dir_makefile.c_str(), strerror(errno)) << endl; |
3e1ec884 | 552 | s.set_try_server (); |
b40af7ee | 553 | return rc; |
dff50e09 | 554 | } |
b40af7ee DS |
555 | |
556 | // Run make | |
7d26ee02 | 557 | vector<string> make_cmd = make_make_cmd(s, s.tmpdir); |
6274464e | 558 | rc = run_make_cmd(s, make_cmd); |
3e1ec884 DB |
559 | if (rc) |
560 | s.set_try_server (); | |
f4b28491 FCE |
561 | return rc; |
562 | } | |
563 | ||
db3a383b JK |
564 | /* |
565 | * If uprobes was built as part of the kernel build (either built-in | |
dbb9345d FCE |
566 | * or as a module), the uprobes exports should show up. This is to be |
567 | * as distinct from the stap-built uprobes.ko from the runtime. | |
db3a383b JK |
568 | */ |
569 | static bool | |
570 | kernel_built_uprobes (systemtap_session& s) | |
6274464e | 571 | { |
ac3af990 | 572 | if (s.runtime_usermode_p()) |
4441e344 JS |
573 | return true; // sort of, via dyninst |
574 | ||
95113339 FCE |
575 | // see also tapsets.cxx:kernel_supports_inode_uprobes() |
576 | return ((s.kernel_config["CONFIG_ARCH_SUPPORTS_UPROBES"] == "y" && s.kernel_config["CONFIG_UPROBES"] == "y") || | |
577 | (s.kernel_exports.find("unregister_uprobe") != s.kernel_exports.end())); | |
6274464e JK |
578 | } |
579 | ||
7d26ee02 JS |
580 | static int |
581 | make_uprobes (systemtap_session& s) | |
6274464e | 582 | { |
7ef486ad | 583 | if (s.verbose > 1) |
7d26ee02 | 584 | clog << _("Pass 4, preamble: (re)building SystemTap's version of uprobes.") |
db3a383b JK |
585 | << endl; |
586 | ||
7d26ee02 JS |
587 | // create a subdirectory for the uprobes module |
588 | string dir(s.tmpdir + "/uprobes"); | |
589 | if (create_dir(dir.c_str()) != 0) | |
590 | { | |
2713ea24 | 591 | s.print_warning("failed to create directory for build uprobes."); |
7d26ee02 JS |
592 | s.set_try_server (); |
593 | return 1; | |
0da3e7a0 | 594 | } |
6274464e | 595 | |
7d26ee02 JS |
596 | // create a simple Makefile |
597 | string makefile(dir + "/Makefile"); | |
598 | ofstream omf(makefile.c_str()); | |
599 | omf << "obj-m := uprobes.o" << endl; | |
600 | // RHBZ 655231: later rhel6 kernels' module-signing kbuild logic breaks out-of-tree modules | |
601 | omf << "CONFIG_MODULE_SIG := n" << endl; | |
602 | omf.close(); | |
6274464e | 603 | |
7d26ee02 | 604 | // create a simple #include-chained source file |
2ba1736a | 605 | string runtimesourcefile(s.runtime_path + "/linux/uprobes/uprobes.c"); |
7d26ee02 JS |
606 | string sourcefile(dir + "/uprobes.c"); |
607 | ofstream osrc(sourcefile.c_str()); | |
608 | osrc << "#include \"" << runtimesourcefile << "\"" << endl; | |
76d01f36 FCE |
609 | |
610 | // pass --modinfo k=v to uprobes build too | |
611 | for (unsigned i = 0; i < s.modinfos.size(); i++) | |
612 | { | |
613 | const string& mi = s.modinfos[i]; | |
614 | size_t loc = mi.find('='); | |
615 | string tag = mi.substr (0, loc); | |
616 | string value = mi.substr (loc+1); | |
617 | osrc << "MODULE_INFO(" << tag << "," << lex_cast_qstring(value) << ");" << endl; | |
618 | } | |
619 | ||
7d26ee02 JS |
620 | osrc.close(); |
621 | ||
622 | // make the module | |
623 | vector<string> make_cmd = make_make_cmd(s, dir); | |
ae5e0bbb | 624 | int rc = run_make_cmd(s, make_cmd); |
7d26ee02 JS |
625 | if (!rc && !copy_file(dir + "/Module.symvers", |
626 | s.tmpdir + "/Module.symvers")) | |
627 | rc = -1; | |
6274464e | 628 | |
f4d5049b | 629 | if (s.verbose > 1) |
ce0f6648 | 630 | clog << _("uprobes rebuild exit code: ") << rc << endl; |
3e1ec884 DB |
631 | if (rc) |
632 | s.set_try_server (); | |
91ea0ce6 | 633 | else |
7d26ee02 | 634 | s.uprobes_path = dir + "/uprobes.ko"; |
6274464e JK |
635 | return rc; |
636 | } | |
637 | ||
7d26ee02 JS |
638 | static bool |
639 | get_cached_uprobes(systemtap_session& s) | |
640 | { | |
641 | s.uprobes_hash = s.use_cache ? find_uprobes_hash(s) : ""; | |
642 | if (!s.uprobes_hash.empty()) | |
643 | { | |
644 | // NB: We always put uprobes.ko in its own directory, especially so | |
645 | // stap-serverd can more easily locate it. | |
646 | string dir(s.tmpdir + "/uprobes"); | |
647 | if (create_dir(dir.c_str()) != 0) | |
648 | return false; | |
649 | ||
650 | string cacheko = s.uprobes_hash + ".ko"; | |
651 | string tmpko = dir + "/uprobes.ko"; | |
652 | ||
653 | // The symvers file still needs to go in the script module's directory. | |
654 | string cachesyms = s.uprobes_hash + ".symvers"; | |
655 | string tmpsyms = s.tmpdir + "/Module.symvers"; | |
656 | ||
657 | if (get_file_size(cacheko) > 0 && copy_file(cacheko, tmpko) && | |
658 | get_file_size(cachesyms) > 0 && copy_file(cachesyms, tmpsyms)) | |
659 | { | |
660 | s.uprobes_path = tmpko; | |
661 | return true; | |
662 | } | |
663 | } | |
664 | return false; | |
665 | } | |
666 | ||
667 | static void | |
668 | set_cached_uprobes(systemtap_session& s) | |
db3a383b | 669 | { |
7d26ee02 JS |
670 | if (s.use_cache && !s.uprobes_hash.empty()) |
671 | { | |
672 | string cacheko = s.uprobes_hash + ".ko"; | |
673 | string tmpko = s.tmpdir + "/uprobes/uprobes.ko"; | |
674 | copy_file(tmpko, cacheko); | |
36ef6d6a | 675 | |
7d26ee02 JS |
676 | string cachesyms = s.uprobes_hash + ".symvers"; |
677 | string tmpsyms = s.tmpdir + "/uprobes/Module.symvers"; | |
678 | copy_file(tmpsyms, cachesyms); | |
679 | } | |
db3a383b JK |
680 | } |
681 | ||
7d26ee02 | 682 | int |
db3a383b JK |
683 | uprobes_pass (systemtap_session& s) |
684 | { | |
685 | if (!s.need_uprobes || kernel_built_uprobes(s)) | |
686 | return 0; | |
0944a81e | 687 | |
6c7e2241 | 688 | if (s.kernel_config["CONFIG_UTRACE"] != string("y")) |
01fa08f2 | 689 | { |
6c9f0b7b | 690 | clog << _("user-space process-tracking facilities not available [man error::process-tracking]") << endl; |
01fa08f2 DS |
691 | s.set_try_server (); |
692 | return 1; | |
693 | } | |
0944a81e | 694 | |
db3a383b | 695 | /* |
7d26ee02 JS |
696 | * We need to use the version of uprobes that comes with SystemTap. Try to |
697 | * get it from the cache first. If not found, build it and try to save it to | |
698 | * the cache for future reuse. | |
db3a383b | 699 | */ |
7d26ee02 JS |
700 | int rc = 0; |
701 | if (!get_cached_uprobes(s)) | |
702 | { | |
703 | rc = make_uprobes(s); | |
704 | if (!rc) | |
705 | set_cached_uprobes(s); | |
706 | } | |
3e1ec884 DB |
707 | if (rc) |
708 | s.set_try_server (); | |
db3a383b JK |
709 | return rc; |
710 | } | |
711 | ||
3a894f7e JS |
712 | static |
713 | vector<string> | |
714 | make_dyninst_run_command (systemtap_session& s, const string& remotedir, | |
dabd71bb | 715 | const string&) |
3a894f7e | 716 | { |
c2f14e64 | 717 | vector<string> cmd { getenv("SYSTEMTAP_STAPDYN") ?: BINDIR "/stapdyn" }; |
e75a4464 JS |
718 | |
719 | // use slightly less verbosity | |
c2f14e64 JS |
720 | if (s.verbose > 0) |
721 | cmd.insert(cmd.end(), s.verbose - 1, "-v"); | |
722 | ||
41300e6d JS |
723 | if (s.suppress_warnings) |
724 | cmd.push_back("-w"); | |
3a894f7e JS |
725 | |
726 | if (!s.cmd.empty()) | |
c2f14e64 | 727 | cmd.insert(cmd.end(), { "-c", s.cmd }); |
3a894f7e | 728 | |
02bff028 | 729 | if (s.target_pid) |
c2f14e64 | 730 | cmd.insert(cmd.end(), { "-x", lex_cast(s.target_pid) }); |
02bff028 | 731 | |
6d842dc7 | 732 | if (!s.output_file.empty()) |
c2f14e64 | 733 | cmd.insert(cmd.end(), { "-o", s.output_file }); |
6d842dc7 | 734 | |
192130b3 JL |
735 | if (s.color_mode != s.color_auto) |
736 | { | |
c2f14e64 JS |
737 | auto mode = s.color_mode == s.color_always ? "always" : "never"; |
738 | cmd.insert(cmd.end(), { "-C", mode }); | |
192130b3 JL |
739 | } |
740 | ||
3a894f7e | 741 | cmd.push_back((remotedir.empty() ? s.tmpdir : remotedir) |
4441e344 | 742 | + "/" + s.module_filename()); |
3a894f7e | 743 | |
bd268288 SM |
744 | // add module arguments |
745 | cmd.insert(cmd.end(), s.globalopts.begin(), s.globalopts.end()); | |
746 | ||
3a894f7e JS |
747 | return cmd; |
748 | } | |
3a894f7e | 749 | |
5eea6ed1 | 750 | vector<string> |
18630fb8 | 751 | make_run_command (systemtap_session& s, const string& remotedir, |
4112f219 | 752 | const string& version) |
f4b28491 | 753 | { |
ac3af990 | 754 | if (s.runtime_usermode_p()) |
4441e344 JS |
755 | return make_dyninst_run_command(s, remotedir, version); |
756 | ||
a63a95dc | 757 | // for now, just spawn staprun |
c2f14e64 | 758 | vector<string> cmd { getenv("SYSTEMTAP_STAPRUN") ?: BINDIR "/staprun" }; |
e75a4464 JS |
759 | |
760 | // use slightly less verbosity | |
c2f14e64 JS |
761 | if (s.verbose > 0) |
762 | cmd.insert(cmd.end(), s.verbose - 1, "-v"); | |
763 | ||
5eea6ed1 | 764 | if (s.suppress_warnings) |
c2f14e64 | 765 | cmd.push_back("-w"); |
5eea6ed1 JS |
766 | |
767 | if (!s.output_file.empty()) | |
c2f14e64 | 768 | cmd.insert(cmd.end(), { "-o", s.output_file }); |
dff50e09 | 769 | |
5eea6ed1 | 770 | if (!s.cmd.empty()) |
c2f14e64 | 771 | cmd.insert(cmd.end(), { "-c", s.cmd }); |
dff50e09 | 772 | |
cbfbbf69 | 773 | if (s.target_pid) |
c2f14e64 | 774 | cmd.insert(cmd.end(), { "-t", lex_cast(s.target_pid) }); |
dff50e09 | 775 | |
e9bb2221 | 776 | if (s.target_namespaces_pid) |
c2f14e64 | 777 | cmd.insert(cmd.end(), { "-N", lex_cast(s.target_namespaces_pid) }); |
e9bb2221 | 778 | |
cbfbbf69 | 779 | if (s.buffer_size) |
c2f14e64 | 780 | cmd.insert(cmd.end(), { "-b", lex_cast(s.buffer_size) }); |
dff50e09 | 781 | |
13128684 | 782 | if (s.need_uprobes && !kernel_built_uprobes(s)) |
5eea6ed1 | 783 | { |
18630fb8 JS |
784 | string opt_u = "-u"; |
785 | if (!s.uprobes_path.empty() && | |
786 | strverscmp("1.4", version.c_str()) <= 0) | |
787 | { | |
788 | if (remotedir.empty()) | |
789 | opt_u.append(s.uprobes_path); | |
790 | else | |
791 | opt_u.append(remotedir + "/" + basename(s.uprobes_path.c_str())); | |
792 | } | |
c2f14e64 | 793 | cmd.push_back(opt_u); |
5eea6ed1 | 794 | } |
6274464e | 795 | |
2fa2a091 | 796 | if (s.load_only) |
c2f14e64 | 797 | cmd.push_back(s.output_file.empty() ? "-L" : "-D"); |
701c41be | 798 | |
b3367f63 DS |
799 | // Note that if this system requires signed modules, we can't rename |
800 | // it after it has been signed. | |
801 | if (!s.modname_given && (strverscmp("1.6", version.c_str()) <= 0) | |
cd1418c7 | 802 | && s.mok_fingerprints.empty()) |
c2f14e64 | 803 | cmd.push_back("-R"); |
5c854d7c | 804 | |
701c41be | 805 | if (!s.size_option.empty()) |
c2f14e64 | 806 | cmd.insert(cmd.end(), { "-S", s.size_option }); |
2fa2a091 | 807 | |
192130b3 | 808 | if (s.color_mode != s.color_auto) |
579f0947 | 809 | { |
c2f14e64 JS |
810 | auto mode = s.color_mode == s.color_always ? "always" : "never"; |
811 | cmd.insert(cmd.end(), { "-C", mode }); | |
579f0947 JL |
812 | } |
813 | ||
10bb5efc | 814 | if (s.monitor) |
c2f14e64 | 815 | cmd.insert(cmd.end(), { "-M", lex_cast(s.monitor_interval) }); |
10bb5efc | 816 | |
c2f14e64 | 817 | cmd.push_back((remotedir.empty() ? s.tmpdir : remotedir) |
4441e344 | 818 | + "/" + s.module_filename()); |
dff50e09 | 819 | |
bb25d08f | 820 | // add module arguments |
c2f14e64 | 821 | cmd.insert(cmd.end(), s.globalopts.begin(), s.globalopts.end()); |
bb25d08f | 822 | |
c2f14e64 | 823 | return cmd; |
f4b28491 | 824 | } |
73267b89 | 825 | |
0a6f5a3f | 826 | |
c9ccb642 FCE |
827 | // Build tiny kernel modules to query tracepoints. |
828 | // Given a (header-file -> test-contents) map, compile them ASAP, and return | |
2a0e62a8 | 829 | // a (header-file -> obj-filename) map. |
c9ccb642 FCE |
830 | |
831 | map<string,string> | |
832 | make_tracequeries(systemtap_session& s, const map<string,string>& contents) | |
0a6f5a3f | 833 | { |
f982c59b | 834 | static unsigned tick = 0; |
aca66a36 | 835 | string basename("tracequery_kmod_" + lex_cast(++tick)); |
2a0e62a8 | 836 | map<string,string> objs; |
f982c59b | 837 | |
0a6f5a3f | 838 | // create a subdirectory for the module |
f982c59b | 839 | string dir(s.tmpdir + "/" + basename); |
0a6f5a3f JS |
840 | if (create_dir(dir.c_str()) != 0) |
841 | { | |
2713ea24 | 842 | s.print_warning("failed to create directory for querying tracepoints."); |
3e1ec884 | 843 | s.set_try_server (); |
2a0e62a8 | 844 | return objs; |
0a6f5a3f JS |
845 | } |
846 | ||
0a6f5a3f JS |
847 | // create a simple Makefile |
848 | string makefile(dir + "/Makefile"); | |
849 | ofstream omf(makefile.c_str()); | |
9ccda279 | 850 | // force debuginfo generation, and relax implicit functions |
2537a880 | 851 | omf << "EXTRA_CFLAGS := -g -Wno-implicit-function-declaration " << WERROR << endl; |
a7ec2317 FCE |
852 | // RHBZ 655231: later rhel6 kernels' module-signing kbuild logic breaks out-of-tree modules |
853 | omf << "CONFIG_MODULE_SIG := n" << endl; | |
854 | ||
8bb62408 JS |
855 | // PR18389: disable GCC's Identical Code Folding, since the stubs may look identical |
856 | omf << "EXTRA_CFLAGS += $(call cc-option,-fno-ipa-icf)" << endl; | |
857 | ||
18b13994 | 858 | omf << "EXTRA_CFLAGS += -I" + s.kernel_build_tree << endl; |
c9ccb642 FCE |
859 | if (s.kernel_source_tree != "") |
860 | omf << "EXTRA_CFLAGS += -I" + s.kernel_source_tree << endl; | |
ac4f2837 DS |
861 | for (unsigned i = 0; i < s.kernel_extra_cflags.size(); i++) |
862 | omf << "EXTRA_CFLAGS += " + s.kernel_extra_cflags[i] << endl; | |
0a6f5a3f | 863 | |
c9ccb642 FCE |
864 | omf << "obj-m := " << endl; |
865 | // write out each header-specific source file into a separate file | |
866 | for (map<string,string>::const_iterator it = contents.begin(); it != contents.end(); it++) | |
867 | { | |
868 | string sbasename = basename + "_" + lex_cast(++tick); // suffixed | |
869 | ||
870 | // write out source code | |
871 | string srcname = dir + "/" + sbasename + ".c"; | |
872 | string src = it->second; | |
873 | ofstream osrc(srcname.c_str()); | |
874 | osrc << src; | |
875 | osrc.close(); | |
876 | ||
77b163ae FCE |
877 | if (s.verbose > 2) |
878 | clog << _F("Processing tracepoint header %s with query %s", | |
879 | it->first.c_str(), srcname.c_str()) | |
880 | << endl; | |
881 | ||
c9ccb642 FCE |
882 | // arrange to build it |
883 | omf << "obj-m += " + sbasename + ".o" << endl; // NB: without <dir> prefix | |
2a0e62a8 | 884 | objs[it->first] = dir + "/" + sbasename + ".o"; |
c9ccb642 FCE |
885 | } |
886 | omf.close(); | |
0a6f5a3f JS |
887 | |
888 | // make the module | |
8e0a2563 | 889 | vector<string> make_cmd = make_make_objs_cmd(s, dir); |
e86f32ee | 890 | make_cmd.push_back ("-i"); // ignore errors, give rc 0 even in case of tracepoint header nits |
ff520ff4 JS |
891 | bool quiet = (s.verbose < 4); |
892 | int rc = run_make_cmd(s, make_cmd, quiet, quiet); | |
3e1ec884 DB |
893 | if (rc) |
894 | s.set_try_server (); | |
c2cf1b87 | 895 | |
e86f32ee FCE |
896 | // Sometimes we fail a tracequery due to PR9993 / PR11649 type |
897 | // kernel trace header problems. In this case, due to PR12729, we | |
898 | // used to get a lovely "Warning: make exited with status: 2" but no | |
c2cf1b87 FCE |
899 | // other useful diagnostic. -vvvv would let a user see what's up, |
900 | // but the user can't fix the problem even with that. | |
901 | ||
2a0e62a8 | 902 | return objs; |
0a6f5a3f JS |
903 | } |
904 | ||
3e1c25aa JS |
905 | |
906 | // Build a tiny kernel module to query type information | |
d90053e7 | 907 | static int |
da9e11bd | 908 | make_typequery_kmod(systemtap_session& s, const vector<string>& headers, string& name) |
3e1c25aa JS |
909 | { |
910 | static unsigned tick = 0; | |
aca66a36 | 911 | string basename("typequery_kmod_" + lex_cast(++tick)); |
3e1c25aa JS |
912 | |
913 | // create a subdirectory for the module | |
914 | string dir(s.tmpdir + "/" + basename); | |
915 | if (create_dir(dir.c_str()) != 0) | |
916 | { | |
2713ea24 | 917 | s.print_warning("failed to create directory for querying types."); |
3e1ec884 | 918 | s.set_try_server (); |
3e1c25aa JS |
919 | return 1; |
920 | } | |
921 | ||
922 | name = dir + "/" + basename + ".ko"; | |
923 | ||
924 | // create a simple Makefile | |
925 | string makefile(dir + "/Makefile"); | |
926 | ofstream omf(makefile.c_str()); | |
927 | omf << "EXTRA_CFLAGS := -g -fno-eliminate-unused-debug-types" << endl; | |
3ae4cdf9 | 928 | |
a7ec2317 FCE |
929 | // RHBZ 655231: later rhel6 kernels' module-signing kbuild logic breaks out-of-tree modules |
930 | omf << "CONFIG_MODULE_SIG := n" << endl; | |
931 | ||
3ae4cdf9 JS |
932 | // NB: We use -include instead of #include because that gives us more power. |
933 | // Using #include searches relative to the source's path, which in this case | |
934 | // is /tmp/..., so that's not helpful. Using -include will search relative | |
935 | // to the cwd, which will be the kernel build root. This means if you have a | |
936 | // full kernel build tree, it's possible to get at types that aren't in the | |
937 | // normal include path, e.g.: | |
938 | // @cast(foo, "bsd_acct_struct", "kernel<kernel/acct.c>")->... | |
da9e11bd JS |
939 | omf << "CFLAGS_" << basename << ".o :="; |
940 | for (size_t i = 0; i < headers.size(); ++i) | |
ff520ff4 | 941 | omf << " -include " << lex_cast_qstring(headers[i]); // XXX right quoting? |
da9e11bd | 942 | omf << endl; |
3ae4cdf9 | 943 | |
3e1c25aa JS |
944 | omf << "obj-m := " + basename + ".o" << endl; |
945 | omf.close(); | |
946 | ||
947 | // create our empty source file | |
948 | string source(dir + "/" + basename + ".c"); | |
949 | ofstream osrc(source.c_str()); | |
950 | osrc.close(); | |
951 | ||
952 | // make the module | |
7d26ee02 | 953 | vector<string> make_cmd = make_make_cmd(s, dir); |
ff520ff4 JS |
954 | bool quiet = (s.verbose < 4); |
955 | int rc = run_make_cmd(s, make_cmd, quiet, quiet); | |
3e1ec884 DB |
956 | if (rc) |
957 | s.set_try_server (); | |
958 | return rc; | |
3e1c25aa JS |
959 | } |
960 | ||
961 | ||
962 | // Build a tiny user module to query type information | |
d90053e7 | 963 | static int |
da9e11bd | 964 | make_typequery_umod(systemtap_session& s, const vector<string>& headers, string& name) |
3e1c25aa JS |
965 | { |
966 | static unsigned tick = 0; | |
967 | ||
aca66a36 | 968 | name = s.tmpdir + "/typequery_umod_" + lex_cast(++tick) + ".so"; |
3e1c25aa JS |
969 | |
970 | // make the module | |
3ae4cdf9 JS |
971 | // |
972 | // NB: As with kmod, using -include makes relative paths more useful. The | |
973 | // cwd in this case will be the cwd of stap itself though, which may be | |
974 | // trickier to deal with. It might be better to "cd `dirname $script`" | |
975 | // first... | |
c2f14e64 | 976 | vector<string> cmd |
ff520ff4 | 977 | { |
c2f14e64 JS |
978 | "gcc", "-shared", "-g", "-fno-eliminate-unused-debug-types", |
979 | "-xc", "/dev/null", "-o", name, | |
980 | }; | |
981 | for (size_t i = 0; i < headers.size(); ++i) | |
982 | cmd.insert(cmd.end(), { "-include", headers[i] }); | |
983 | ||
ff520ff4 JS |
984 | bool quiet = (s.verbose < 4); |
985 | int rc = stap_system (s.verbose, cmd, quiet, quiet); | |
3e1ec884 DB |
986 | if (rc) |
987 | s.set_try_server (); | |
988 | return rc; | |
3e1c25aa JS |
989 | } |
990 | ||
d90053e7 JS |
991 | |
992 | int | |
993 | make_typequery(systemtap_session& s, string& module) | |
994 | { | |
995 | int rc; | |
996 | string new_module; | |
da9e11bd | 997 | vector<string> headers; |
60d98537 | 998 | bool kernel = startswith(module, "kernel"); |
d90053e7 | 999 | |
da9e11bd | 1000 | for (size_t end, i = kernel ? 6 : 0; i < module.size(); i = end + 1) |
d90053e7 | 1001 | { |
da9e11bd JS |
1002 | if (module[i] != '<') |
1003 | return -1; | |
1004 | end = module.find('>', ++i); | |
1005 | if (end == string::npos) | |
1006 | return -1; | |
1007 | string header = module.substr(i, end - i); | |
504d2b61 | 1008 | vector<string> matches; |
5ef28d5a | 1009 | if (regexp_match(header, "^[a-zA-Z0-9/_.+-]+$", matches)) |
2713ea24 | 1010 | s.print_warning("skipping malformed @cast header \""+ header + "\""); |
504d2b61 JS |
1011 | else |
1012 | headers.push_back(header); | |
d90053e7 | 1013 | } |
da9e11bd | 1014 | if (headers.empty()) |
d90053e7 JS |
1015 | return -1; |
1016 | ||
da9e11bd JS |
1017 | if (kernel) |
1018 | rc = make_typequery_kmod(s, headers, new_module); | |
1019 | else | |
1020 | rc = make_typequery_umod(s, headers, new_module); | |
1021 | ||
d90053e7 JS |
1022 | if (!rc) |
1023 | module = new_module; | |
1024 | ||
1025 | return rc; | |
1026 | } | |
1027 | ||
73267b89 | 1028 | /* vim: set sw=2 ts=8 cino=>4,n-2,{2,^-2,t0,(0,u0,w1,M1 : */ |