1 /**************************************************************************
3 * Copyright 2011 Jose Fonseca
4 * Copyright 2010 VMware, Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 **************************************************************************/
31 #include "trace_file.hpp"
32 #include "trace_snappyfile.hpp"
33 #include "trace_parser.hpp"
36 #define TRACE_VERBOSE 0
54 bool Parser::open(const char *filename) {
56 if (File::isZLibCompressed(filename)) {
59 file = new SnappyFile;
62 if (!file->open(filename, File::Read)) {
66 version = read_uint();
67 if (version > TRACE_VERSION) {
68 std::cerr << "error: unsupported trace format version " << version << "\n";
75 template <typename Iter>
77 deleteAll(Iter begin, Iter end)
79 while (begin != end) {
85 template <typename Container>
87 deleteAll(Container &c)
89 deleteAll(c.begin(), c.end());
93 void Parser::close(void) {
101 deleteAll(functions);
108 void Parser::getBookmark(ParseBookmark &bookmark) {
109 bookmark.offset = file->currentOffset();
110 bookmark.next_call_no = next_call_no;
114 void Parser::setBookmark(const ParseBookmark &bookmark) {
115 file->setCurrentOffset(bookmark.offset);
116 next_call_no = bookmark.next_call_no;
120 Call *Parser::parse_call(void) {
124 case Trace::EVENT_ENTER:
127 case Trace::EVENT_LEAVE:
128 return parse_leave();
130 std::cerr << "error: unknown event " << c << "\n";
133 for (CallList::iterator it = calls.begin(); it != calls.end(); ++it) {
134 std::cerr << "warning: incomplete call " << (*it)->name() << "\n";
135 std::cerr << **it << "\n";
143 Call * Parser::scan_call()
148 case Trace::EVENT_ENTER:
151 case Trace::EVENT_LEAVE:
154 std::cerr << "error: unknown event " << c << "\n";
157 for (CallList::iterator it = calls.begin(); it != calls.end(); ++it) {
158 std::cerr << "warning: incomplete call " << (*it)->name() << "\n";
159 std::cerr << **it << "\n";
168 * Helper function to lookup an ID in a vector, resizing the vector if it doesn't fit.
171 T *lookup(std::vector<T *> &map, size_t index) {
172 if (index >= map.size()) {
173 map.resize(index + 1);
181 FunctionSig *Parser::parse_function_sig(void) {
182 size_t id = read_uint();
184 FunctionSigState *sig = lookup(functions, id);
187 /* parse the signature */
188 sig = new FunctionSigState;
190 sig->name = read_string();
191 sig->num_args = read_uint();
192 const char **arg_names = new const char *[sig->num_args];
193 for (unsigned i = 0; i < sig->num_args; ++i) {
194 arg_names[i] = read_string();
196 sig->arg_names = arg_names;
197 sig->offset = file->currentOffset();
199 } else if (file->currentOffset() < sig->offset) {
200 /* skip over the signature */
201 skip_string(); /* name */
202 int num_args = read_uint();
203 for (unsigned i = 0; i < num_args; ++i) {
204 skip_string(); /*arg_name*/
213 StructSig *Parser::parse_struct_sig() {
214 size_t id = read_uint();
216 StructSigState *sig = lookup(structs, id);
219 /* parse the signature */
220 sig = new StructSigState;
222 sig->name = read_string();
223 sig->num_members = read_uint();
224 const char **member_names = new const char *[sig->num_members];
225 for (unsigned i = 0; i < sig->num_members; ++i) {
226 member_names[i] = read_string();
228 sig->member_names = member_names;
229 sig->offset = file->currentOffset();
231 } else if (file->currentOffset() < sig->offset) {
232 /* skip over the signature */
233 skip_string(); /* name */
234 unsigned num_members = read_uint();
235 for (unsigned i = 0; i < num_members; ++i) {
236 skip_string(); /* member_name */
245 EnumSig *Parser::parse_enum_sig() {
246 size_t id = read_uint();
248 EnumSigState *sig = lookup(enums, id);
251 /* parse the signature */
252 sig = new EnumSigState;
254 sig->name = read_string();
255 Value *value = parse_value();
256 sig->value = value->toSInt();
258 sig->offset = file->currentOffset();
260 } else if (file->currentOffset() < sig->offset) {
261 /* skip over the signature */
262 skip_string(); /*name*/
271 BitmaskSig *Parser::parse_bitmask_sig() {
272 size_t id = read_uint();
274 BitmaskSigState *sig = lookup(bitmasks, id);
277 /* parse the signature */
278 sig = new BitmaskSigState;
280 sig->num_flags = read_uint();
281 BitmaskFlag *flags = new BitmaskFlag[sig->num_flags];
282 for (BitmaskFlag *it = flags; it != flags + sig->num_flags; ++it) {
283 it->name = read_string();
284 it->value = read_uint();
285 if (it->value == 0 && it != flags) {
286 std::cerr << "warning: bitmask " << it->name << " is zero but is not first flag\n";
290 sig->offset = file->currentOffset();
292 } else if (file->currentOffset() < sig->offset) {
293 /* skip over the signature */
294 int num_flags = read_uint();
295 for (int i = 0; i < num_flags; ++i) {
296 skip_string(); /*name */
297 skip_uint(); /* value */
306 void Parser::parse_enter(void) {
307 FunctionSig *sig = parse_function_sig();
309 Call *call = new Call(sig);
311 call->no = next_call_no++;
313 if (parse_call_details(call)) {
314 calls.push_back(call);
321 void Parser::scan_enter(void) {
322 FunctionSig *sig = parse_function_sig();
324 Call *call = new Call(sig);
325 call->no = next_call_no++;
327 if (scan_call_details(call)) {
328 calls.push_back(call);
335 Call *Parser::parse_leave(void) {
336 unsigned call_no = read_uint();
338 for (CallList::iterator it = calls.begin(); it != calls.end(); ++it) {
339 if ((*it)->no == call_no) {
349 if (parse_call_details(call)) {
358 Call *Parser::scan_leave(void) {
359 unsigned call_no = read_uint();
361 for (CallList::iterator it = calls.begin(); it != calls.end(); ++it) {
362 if ((*it)->no == call_no) {
372 if (scan_call_details(call)) {
381 bool Parser::parse_call_details(Call *call) {
385 case Trace::CALL_END:
387 case Trace::CALL_ARG:
390 case Trace::CALL_RET:
391 call->ret = parse_value();
394 std::cerr << "error: ("<<call->name()<< ") unknown call detail "
404 bool Parser::scan_call_details(Call *call) {
408 case Trace::CALL_END:
410 case Trace::CALL_ARG:
413 case Trace::CALL_RET:
417 std::cerr << "error: ("<<call->name()<< ") unknown call detail "
427 void Parser::parse_arg(Call *call) {
428 unsigned index = read_uint();
429 Value *value = parse_value();
430 if (index >= call->args.size()) {
431 call->args.resize(index + 1);
433 call->args[index] = value;
437 void Parser::scan_arg(Call *call) {
438 skip_uint(); /* index */
439 scan_value(); /* value */
443 Value *Parser::parse_value(void) {
448 case Trace::TYPE_NULL:
451 case Trace::TYPE_FALSE:
452 value = new Bool(false);
454 case Trace::TYPE_TRUE:
455 value = new Bool(true);
457 case Trace::TYPE_SINT:
458 value = parse_sint();
460 case Trace::TYPE_UINT:
461 value = parse_uint();
463 case Trace::TYPE_FLOAT:
464 value = parse_float();
466 case Trace::TYPE_DOUBLE:
467 value = parse_double();
469 case Trace::TYPE_STRING:
470 value = parse_string();
472 case Trace::TYPE_ENUM:
473 value = parse_enum();
475 case Trace::TYPE_BITMASK:
476 value = parse_bitmask();
478 case Trace::TYPE_ARRAY:
479 value = parse_array();
481 case Trace::TYPE_STRUCT:
482 value = parse_struct();
484 case Trace::TYPE_BLOB:
485 value = parse_blob();
487 case Trace::TYPE_OPAQUE:
488 value = parse_opaque();
491 std::cerr << "error: unknown type " << c << "\n";
499 std::cerr << "\tVALUE " << value << "\n";
506 void Parser::scan_value(void) {
509 case Trace::TYPE_NULL:
510 case Trace::TYPE_FALSE:
511 case Trace::TYPE_TRUE:
513 case Trace::TYPE_SINT:
516 case Trace::TYPE_UINT:
519 case Trace::TYPE_FLOAT:
522 case Trace::TYPE_DOUBLE:
525 case Trace::TYPE_STRING:
528 case Trace::TYPE_ENUM:
531 case Trace::TYPE_BITMASK:
534 case Trace::TYPE_ARRAY:
537 case Trace::TYPE_STRUCT:
540 case Trace::TYPE_BLOB:
543 case Trace::TYPE_OPAQUE:
547 std::cerr << "error: unknown type " << c << "\n";
555 Value *Parser::parse_sint() {
556 return new SInt(-(signed long long)read_uint());
560 void Parser::scan_sint() {
565 Value *Parser::parse_uint() {
566 return new UInt(read_uint());
570 void Parser::scan_uint() {
575 Value *Parser::parse_float() {
577 file->read(&value, sizeof value);
578 return new Float(value);
582 void Parser::scan_float() {
583 file->skip(sizeof(float));
587 Value *Parser::parse_double() {
589 file->read(&value, sizeof value);
590 return new Float(value);
594 void Parser::scan_double() {
595 file->skip(sizeof(double));
599 Value *Parser::parse_string() {
600 return new String(read_string());
604 void Parser::scan_string() {
609 Value *Parser::parse_enum() {
610 EnumSig *sig = parse_enum_sig();
611 return new Enum(sig);
615 void Parser::scan_enum() {
620 Value *Parser::parse_bitmask() {
621 BitmaskSig *sig = parse_bitmask_sig();
623 unsigned long long value = read_uint();
625 return new Bitmask(sig, value);
629 void Parser::scan_bitmask() {
631 skip_uint(); /* value */
635 Value *Parser::parse_array(void) {
636 size_t len = read_uint();
637 Array *array = new Array(len);
638 for (size_t i = 0; i < len; ++i) {
639 array->values[i] = parse_value();
645 void Parser::scan_array(void) {
646 size_t len = read_uint();
647 for (size_t i = 0; i < len; ++i) {
653 Value *Parser::parse_blob(void) {
654 size_t size = read_uint();
655 Blob *blob = new Blob(size);
657 file->read(blob->buf, (unsigned)size);
663 void Parser::scan_blob(void) {
664 size_t size = read_uint();
671 Value *Parser::parse_struct() {
672 StructSig *sig = parse_struct_sig();
673 Struct *value = new Struct(sig);
675 for (size_t i = 0; i < sig->num_members; ++i) {
676 value->members[i] = parse_value();
683 void Parser::scan_struct() {
684 StructSig *sig = parse_struct_sig();
685 for (size_t i = 0; i < sig->num_members; ++i) {
691 Value *Parser::parse_opaque() {
692 unsigned long long addr;
694 return new Pointer(addr);
698 void Parser::scan_opaque() {
703 const char * Parser::read_string(void) {
704 size_t len = read_uint();
705 char * value = new char[len + 1];
707 file->read(value, (unsigned)len);
711 std::cerr << "\tSTRING \"" << value << "\"\n";
717 void Parser::skip_string(void) {
718 size_t len = read_uint();
723 unsigned long long Parser::read_uint(void) {
724 unsigned long long value = 0;
732 value |= (unsigned long long)(c & 0x7f) << shift;
736 std::cerr << "\tUINT " << value << "\n";
742 void Parser::skip_uint(void) {
753 inline int Parser::read_byte(void) {
754 int c = file->getc();
757 std::cerr << "\tEOF" << "\n";
759 std::cerr << "\tBYTE 0x" << std::hex << c << std::dec << "\n";
765 inline void Parser::skip_byte(void) {
770 } /* namespace Trace */