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
46 m_supportsSeeking = false;
55 bool Parser::open(const char *filename) {
57 if (File::isZLibCompressed(filename)) {
60 file = new SnappyFile;
63 if (!file->open(filename, File::Read)) {
66 m_supportsSeeking = file->supportsOffsets();
68 version = read_uint();
69 if (version > TRACE_VERSION) {
70 std::cerr << "error: unsupported trace format version " << version << "\n";
77 template <typename Iter>
79 deleteAll(Iter begin, Iter end)
81 while (begin != end) {
87 template <typename Container>
89 deleteAll(Container &c)
91 deleteAll(c.begin(), c.end());
95 void Parser::close(void) {
103 deleteAll(functions);
110 Call *Parser::parse_call(void) {
114 case Trace::EVENT_ENTER:
117 case Trace::EVENT_LEAVE:
118 return parse_leave();
120 std::cerr << "error: unknown event " << c << "\n";
123 for (CallList::iterator it = calls.begin(); it != calls.end(); ++it) {
124 std::cerr << "warning: incomplete call " << (*it)->name() << "\n";
125 std::cerr << **it << "\n";
134 * Helper function to lookup an ID in a vector, resizing the vector if it doesn't fit.
137 T *lookup(std::vector<T *> &map, size_t index) {
138 if (index >= map.size()) {
139 map.resize(index + 1);
147 FunctionSig *Parser::parse_function_sig(void) {
148 size_t id = read_uint();
150 FunctionSigState *sig = lookup(functions, id);
153 /* parse the signature */
154 sig = new FunctionSigState;
156 sig->name = read_string();
157 sig->num_args = read_uint();
158 const char **arg_names = new const char *[sig->num_args];
159 for (unsigned i = 0; i < sig->num_args; ++i) {
160 arg_names[i] = read_string();
162 sig->arg_names = arg_names;
163 if (m_supportsSeeking) {
164 sig->offset = file->currentOffset();
167 } else if (file->currentOffset() < sig->offset) {
168 /* skip over the signature */
169 skip_string(); /* name */
170 int num_args = read_uint();
171 for (unsigned i = 0; i < num_args; ++i) {
172 skip_string(); /*arg_name*/
180 void Parser::parse_enter(void) {
181 FunctionSig *sig = parse_function_sig();
183 Call *call = new Call(sig);
185 call->no = next_call_no++;
187 if (parse_call_details(call)) {
188 calls.push_back(call);
195 Call *Parser::parse_leave(void) {
196 unsigned call_no = read_uint();
198 for (CallList::iterator it = calls.begin(); it != calls.end(); ++it) {
199 if ((*it)->no == call_no) {
209 if (parse_call_details(call)) {
218 bool Parser::parse_call_details(Call *call) {
222 case Trace::CALL_END:
224 case Trace::CALL_ARG:
227 case Trace::CALL_RET:
228 call->ret = parse_value();
231 std::cerr << "error: ("<<call->name()<< ") unknown call detail "
241 void Parser::parse_arg(Call *call) {
242 unsigned index = read_uint();
243 Value *value = parse_value();
244 if (index >= call->args.size()) {
245 call->args.resize(index + 1);
247 call->args[index] = value;
251 Value *Parser::parse_value(void) {
256 case Trace::TYPE_NULL:
259 case Trace::TYPE_FALSE:
260 value = new Bool(false);
262 case Trace::TYPE_TRUE:
263 value = new Bool(true);
265 case Trace::TYPE_SINT:
266 value = parse_sint();
268 case Trace::TYPE_UINT:
269 value = parse_uint();
271 case Trace::TYPE_FLOAT:
272 value = parse_float();
274 case Trace::TYPE_DOUBLE:
275 value = parse_double();
277 case Trace::TYPE_STRING:
278 value = parse_string();
280 case Trace::TYPE_ENUM:
281 value = parse_enum();
283 case Trace::TYPE_BITMASK:
284 value = parse_bitmask();
286 case Trace::TYPE_ARRAY:
287 value = parse_array();
289 case Trace::TYPE_STRUCT:
290 value = parse_struct();
292 case Trace::TYPE_BLOB:
293 value = parse_blob();
295 case Trace::TYPE_OPAQUE:
296 value = parse_opaque();
299 std::cerr << "error: unknown type " << c << "\n";
307 std::cerr << "\tVALUE " << value << "\n";
314 Value *Parser::parse_sint() {
315 return new SInt(-(signed long long)read_uint());
319 Value *Parser::parse_uint() {
320 return new UInt(read_uint());
324 Value *Parser::parse_float() {
326 file->read(&value, sizeof value);
327 return new Float(value);
331 Value *Parser::parse_double() {
333 file->read(&value, sizeof value);
334 return new Float(value);
338 Value *Parser::parse_string() {
339 return new String(read_string());
343 EnumSig *Parser::parse_enum_sig() {
344 size_t id = read_uint();
346 EnumSigState *sig = lookup(enums, id);
349 /* parse the signature */
350 sig = new EnumSigState;
352 sig->name = read_string();
353 Value *value = parse_value();
354 sig->value = value->toSInt();
356 sig->offset = file->currentOffset();
358 } else if (file->currentOffset() < sig->offset) {
359 /* skip over the signature */
360 skip_string(); /*name*/
368 Value *Parser::parse_enum() {
369 EnumSig *sig = parse_enum_sig();
370 return new Enum(sig);
374 BitmaskSig *Parser::parse_bitmask_sig() {
375 size_t id = read_uint();
377 BitmaskSigState *sig = lookup(bitmasks, id);
380 /* parse the signature */
381 sig = new BitmaskSigState;
383 sig->num_flags = read_uint();
384 BitmaskFlag *flags = new BitmaskFlag[sig->num_flags];
385 for (BitmaskFlag *it = flags; it != flags + sig->num_flags; ++it) {
386 it->name = read_string();
387 it->value = read_uint();
388 if (it->value == 0 && it != flags) {
389 std::cerr << "warning: bitmask " << it->name << " is zero but is not first flag\n";
393 sig->offset = file->currentOffset();
395 } else if (file->currentOffset() < sig->offset) {
396 /* skip over the signature */
397 int num_flags = read_uint();
398 for (int i = 0; i < num_flags; ++i) {
399 skip_string(); /*name */
400 skip_uint(); /* value */
409 Value *Parser::parse_bitmask() {
410 BitmaskSig *sig = parse_bitmask_sig();
412 unsigned long long value = read_uint();
414 return new Bitmask(sig, value);
418 Value *Parser::parse_array(void) {
419 size_t len = read_uint();
420 Array *array = new Array(len);
421 for (size_t i = 0; i < len; ++i) {
422 array->values[i] = parse_value();
428 Value *Parser::parse_blob(void) {
429 size_t size = read_uint();
430 Blob *blob = new Blob(size);
432 file->read(blob->buf, (unsigned)size);
438 StructSig *Parser::parse_struct_sig() {
439 size_t id = read_uint();
441 StructSigState *sig = lookup(structs, id);
444 /* parse the signature */
445 sig = new StructSigState;
447 sig->name = read_string();
448 sig->num_members = read_uint();
449 const char **member_names = new const char *[sig->num_members];
450 for (unsigned i = 0; i < sig->num_members; ++i) {
451 member_names[i] = read_string();
453 sig->member_names = member_names;
454 sig->offset = file->currentOffset();
456 } else if (file->currentOffset() < sig->offset) {
457 /* skip over the signature */
458 skip_string(); /* name */
459 unsigned num_members = read_uint();
460 for (unsigned i = 0; i < num_members; ++i) {
461 skip_string(); /* member_name */
469 Value *Parser::parse_struct() {
470 StructSig *sig = parse_struct_sig();
471 Struct *value = new Struct(sig);
473 for (size_t i = 0; i < sig->num_members; ++i) {
474 value->members[i] = parse_value();
481 Value *Parser::parse_opaque() {
482 unsigned long long addr;
484 return new Pointer(addr);
488 const char * Parser::read_string(void) {
489 size_t len = read_uint();
490 char * value = new char[len + 1];
492 file->read(value, (unsigned)len);
496 std::cerr << "\tSTRING \"" << value << "\"\n";
502 unsigned long long Parser::read_uint(void) {
503 unsigned long long value = 0;
511 value |= (unsigned long long)(c & 0x7f) << shift;
515 std::cerr << "\tUINT " << value << "\n";
521 inline int Parser::read_byte(void) {
522 int c = file->getc();
525 std::cerr << "\tEOF" << "\n";
527 std::cerr << "\tBYTE 0x" << std::hex << c << std::dec << "\n";
533 Call * Parser::scan_call()
535 assert(m_supportsSeeking);
539 case Trace::EVENT_ENTER:
542 case Trace::EVENT_LEAVE:
545 std::cerr << "error: unknown event " << c << "\n";
548 for (CallList::iterator it = calls.begin(); it != calls.end(); ++it) {
549 std::cerr << "warning: incomplete call " << (*it)->name() << "\n";
550 std::cerr << **it << "\n";
557 void Parser::scan_enter(void) {
558 FunctionSig *sig = parse_function_sig();
560 Call *call = new Call(sig);
561 call->no = next_call_no++;
563 if (scan_call_details(call)) {
564 calls.push_back(call);
570 Call *Parser::scan_leave(void) {
571 unsigned call_no = read_uint();
573 for (CallList::iterator it = calls.begin(); it != calls.end(); ++it) {
574 if ((*it)->no == call_no) {
584 if (scan_call_details(call)) {
592 bool Parser::scan_call_details(Call *call) {
596 case Trace::CALL_END:
598 case Trace::CALL_ARG:
601 case Trace::CALL_RET:
605 std::cerr << "error: ("<<call->name()<< ") unknown call detail "
614 void Parser::scan_arg(Call *call) {
615 skip_uint(); /* index */
616 scan_value(); /* value */
620 void Parser::scan_value(void) {
623 case Trace::TYPE_NULL:
624 case Trace::TYPE_FALSE:
625 case Trace::TYPE_TRUE:
627 case Trace::TYPE_SINT:
630 case Trace::TYPE_UINT:
633 case Trace::TYPE_FLOAT:
636 case Trace::TYPE_DOUBLE:
639 case Trace::TYPE_STRING:
642 case Trace::TYPE_ENUM:
645 case Trace::TYPE_BITMASK:
648 case Trace::TYPE_ARRAY:
651 case Trace::TYPE_STRUCT:
654 case Trace::TYPE_BLOB:
657 case Trace::TYPE_OPAQUE:
661 std::cerr << "error: unknown type " << c << "\n";
669 void Parser::scan_sint() {
674 void Parser::scan_uint() {
679 void Parser::scan_float() {
680 file->skip(sizeof(float));
684 void Parser::scan_double() {
685 file->skip(sizeof(double));
689 void Parser::scan_string() {
694 void Parser::scan_enum() {
699 void Parser::scan_bitmask() {
701 skip_uint(); /* value */
705 void Parser::scan_array(void) {
706 size_t len = read_uint();
707 for (size_t i = 0; i < len; ++i) {
713 void Parser::scan_blob(void) {
714 size_t size = read_uint();
721 void Parser::scan_struct() {
722 StructSig *sig = parse_struct_sig();
723 for (size_t i = 0; i < sig->num_members; ++i) {
729 void Parser::scan_opaque() {
734 void Parser::skip_string(void) {
735 size_t len = read_uint();
740 void Parser::skip_uint(void) {
751 inline void Parser::skip_byte(void) {
756 } /* namespace Trace */