trace.cc (4039:b910b61a52b9) trace.cc (4042:dbd98b2264ed)
1/*
2 * Copyright (c) 2001-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

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41#include "base/str.hh"
42#include "base/varargs.hh"
43
44using namespace std;
45
46namespace Trace {
47const string DefaultName("global");
48FlagVec flags(NumFlags, false);
1/*
2 * Copyright (c) 2001-2006 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;

--- 32 unchanged lines hidden (view full) ---

41#include "base/str.hh"
42#include "base/varargs.hh"
43
44using namespace std;
45
46namespace Trace {
47const string DefaultName("global");
48FlagVec flags(NumFlags, false);
49bool enabled = true;
49
50//
51// This variable holds the output stream for debug information. Other
52// than setting up/redirecting this stream, do *NOT* reference this
53// directly; use DebugOut() (see below) to access this stream for
54// output.
55//
56ostream *dprintf_stream = &cerr;

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218
219 ccprintf(os, "\n");
220
221 if (c < 16)
222 break;
223 }
224}
225} // namespace Trace
50
51//
52// This variable holds the output stream for debug information. Other
53// than setting up/redirecting this stream, do *NOT* reference this
54// directly; use DebugOut() (see below) to access this stream for
55// output.
56//
57ostream *dprintf_stream = &cerr;

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219
220 ccprintf(os, "\n");
221
222 if (c < 16)
223 break;
224 }
225}
226} // namespace Trace
226
227//
228// Returns the current output stream for debug information. As a
229// wrapper around Trace::dprintf_stream, this handles cases where debug
230// information is generated in the process of parsing .ini options,
231// before we process the option that sets up the debug output stream
232// itself.
233//
234std::ostream &
235DebugOut()
236{
237 return *Trace::dprintf_stream;
238}
239
240/////////////////////////////////////////////
241//
242// C-linkage functions for invoking from gdb
243//
244/////////////////////////////////////////////
245
246//
247// Dump trace buffer to specified file (cout if NULL)
248//
249void
250dumpTrace(const char *filename)
251{
252 if (filename != NULL) {
253 ofstream out(filename);
254 Trace::theLog.dump(out);
255 out.close();
256 }
257 else {
258 Trace::theLog.dump(cout);
259 }
260}
261
262
263//
264// Turn on/off trace output to cerr. Typically used when trace output
265// is only going to circular buffer, but you want to see what's being
266// sent there as you step through some code in gdb. This uses the
267// same facility as the "trace to file" feature, and will print error
268// messages rather than clobbering an existing ostream pointer.
269//
270void
271echoTrace(bool on)
272{
273 if (on) {
274 if (Trace::dprintf_stream != NULL) {
275 cerr << "Already echoing trace to a file... go do a 'tail -f'"
276 << " on that file instead." << endl;
277 } else {
278 Trace::dprintf_stream = &cerr;
279 }
280 } else {
281 if (Trace::dprintf_stream != &cerr) {
282 cerr << "Not echoing trace to cerr." << endl;
283 } else {
284 Trace::dprintf_stream = NULL;
285 }
286 }
287}
288
289void
290printTraceFlags()
291{
292 using namespace Trace;
293 for (int i = 0; i < numFlagStrings; ++i)
294 if (flags[i])
295 cprintf("%s\n", flagStrings[i]);
296}
297
298void
299tweakTraceFlag(const char *string, bool value)
300{
301 using namespace Trace;
302 std::string str(string);
303
304 for (int i = 0; i < numFlagStrings; ++i) {
305 if (str != flagStrings[i])
306 continue;
307
308 int idx = i;
309
310 if (idx < NumFlags) {
311 flags[idx] = value;
312 } else {
313 idx -= NumFlags;
314 if (idx >= NumCompoundFlags) {
315 ccprintf(cerr, "Invalid compound flag");
316 return;
317 }
318
319 const Flags *flagVec = compoundFlags[idx];
320
321 for (int j = 0; flagVec[j] != -1; ++j) {
322 if (flagVec[j] >= NumFlags) {
323 ccprintf(cerr, "Invalid compound flag");
324 return;
325 }
326 flags[flagVec[j]] = value;
327 }
328 }
329
330 cprintf("flag %s was %s\n", string, value ? "set" : "cleared");
331 return;
332 }
333
334 cprintf("could not find flag %s\n", string);
335}
336
337void
338setTraceFlag(const char *string)
339{
340 tweakTraceFlag(string, true);
341}
342
343void
344clearTraceFlag(const char *string)
345{
346 tweakTraceFlag(string, false);
347}