**************************************************************************/
+#include <assert.h>
+
+#include <zlib.h>
+
#include "trace_parser.hpp"
+#define TRACE_VERBOSE 0
+
+
namespace Trace {
-unsigned long long Trace::Parser::version = 0;
+unsigned long long Parser::version = 0;
+
+
+Parser::Parser() {
+ file = NULL;
+ next_call_no = 0;
+}
+
+
+Parser::~Parser() {
+ close();
+}
+
+
+bool Parser::open(const char *filename) {
+ file = gzopen(filename, "rb");
+ if (!file) {
+ return false;
+ }
+
+ version = read_uint();
+ if (version > TRACE_VERSION) {
+ std::cerr << "error: unsupported format version" << version << "\n";
+ return false;
+ }
+
+ return true;
+}
+
+
+void Parser::close(void) {
+ if (file) {
+ gzclose(file);
+ file = NULL;
+ }
+}
+
+
+Call *Parser::parse_call(void) {
+ do {
+ int c = read_byte();
+ switch(c) {
+ case Trace::EVENT_ENTER:
+ parse_enter();
+ break;
+ case Trace::EVENT_LEAVE:
+ return parse_leave();
+ case Trace::EVENT_MESSAGE:
+ std::cerr << "message: " << read_string() << "\n";
+ break;
+ default:
+ std::cerr << "error: unknown call detail " << c << "\n";
+ assert(0);
+ /* fallthrough */
+ case -1:
+ return NULL;
+ }
+ } while(true);
+}
+
+
+/**
+ * Helper function to lookup an ID in a vector, resizing the vector if it doesn't fit.
+ */
+template<class T>
+T *lookup(std::vector<T *> &map, size_t index) {
+ if (index >= map.size()) {
+ map.resize(index + 1);
+ return NULL;
+ } else {
+ return map[index];
+ }
+}
+
+
+void Parser::parse_enter(void) {
+ size_t id = read_uint();
+
+ Call::Signature *sig = lookup(functions, id);
+ if (!sig) {
+ sig = new Call::Signature;
+ sig->name = read_string();
+ unsigned size = read_uint();
+ for (unsigned i = 0; i < size; ++i) {
+ sig->arg_names.push_back(read_string());
+ }
+ functions[id] = sig;
+ }
+ assert(sig);
+
+ Call *call = new Call(sig);
+ call->no = next_call_no++;
+
+ parse_call_details(call);
+
+ calls.push_back(call);
+}
+
+
+Call *Parser::parse_leave(void) {
+ unsigned call_no = read_uint();
+
+ Call *call = NULL;
+ for (CallList::iterator it = calls.begin(); it != calls.end(); ++it) {
+ if ((*it)->no == call_no) {
+ call = *it;
+ calls.erase(it);
+ break;
+ }
+ }
+ assert(call);
+ if (!call) {
+ return NULL;
+ }
+ parse_call_details(call);
+ return call;
+}
+
+
+void Parser::parse_call_details(Call *call) {
+ do {
+ int c = read_byte();
+ switch(c) {
+ case Trace::CALL_END:
+ return;
+ case Trace::CALL_ARG:
+ parse_arg(call);
+ break;
+ case Trace::CALL_RET:
+ call->ret = parse_value();
+ break;
+ default:
+ std::cerr << "error: unknown call detail " << c << "\n";
+ assert(0);
+ /* fallthrough */
+ case -1:
+ return;
+ }
+ } while(true);
+}
+
+
+void Parser::parse_arg(Call *call) {
+ unsigned index = read_uint();
+ Value *value = parse_value();
+ if (index >= call->args.size()) {
+ call->args.resize(index + 1);
+ }
+ call->args[index] = value;
+}
+
+
+Value *Parser::parse_value(void) {
+ int c;
+ c = read_byte();
+ switch(c) {
+ case Trace::TYPE_NULL:
+ return new Null;
+ case Trace::TYPE_FALSE:
+ return new Bool(false);
+ case Trace::TYPE_TRUE:
+ return new Bool(true);
+ case Trace::TYPE_SINT:
+ return parse_sint();
+ case Trace::TYPE_UINT:
+ return parse_uint();
+ case Trace::TYPE_FLOAT:
+ return parse_float();
+ case Trace::TYPE_DOUBLE:
+ return parse_double();
+ case Trace::TYPE_STRING:
+ return parse_string();
+ case Trace::TYPE_ENUM:
+ return parse_enum();
+ case Trace::TYPE_BITMASK:
+ return parse_bitmask();
+ case Trace::TYPE_ARRAY:
+ return parse_array();
+ case Trace::TYPE_STRUCT:
+ return parse_struct();
+ case Trace::TYPE_BLOB:
+ return parse_blob();
+ case Trace::TYPE_OPAQUE:
+ return parse_opaque();
+ default:
+ std::cerr << "error: unknown type " << c << "\n";
+ assert(0);
+ return NULL;
+ }
+}
+
+
+Value *Parser::parse_sint() {
+ return new SInt(-(signed long long)read_uint());
+}
+
+
+Value *Parser::parse_uint() {
+ return new UInt(read_uint());
+}
+
+
+Value *Parser::parse_float() {
+ float value;
+ gzread(file, &value, sizeof value);
+ return new Float(value);
+}
+
+
+Value *Parser::parse_double() {
+ double value;
+ gzread(file, &value, sizeof value);
+ return new Float(value);
+}
+
+
+Value *Parser::parse_string() {
+ return new String(read_string());
+}
+
+
+Value *Parser::parse_enum() {
+ size_t id = read_uint();
+ Enum::Signature *sig = lookup(enums, id);
+ if (!sig) {
+ std::string name = read_string();
+ Value *value = parse_value();
+ sig = new Enum::Signature(name, value);
+ enums[id] = sig;
+ }
+ assert(sig);
+ return new Enum(sig);
+}
+
+
+Value *Parser::parse_bitmask() {
+ size_t id = read_uint();
+ Bitmask::Signature *sig = lookup(bitmasks, id);
+ if (!sig) {
+ size_t size = read_uint();
+ sig = new Bitmask::Signature(size);
+ for (Bitmask::Signature::iterator it = sig->begin(); it != sig->end(); ++it) {
+ it->first = read_string();
+ it->second = read_uint();
+ if (it->second == 0 && it != sig->begin()) {
+ std::cerr << "warning: bitmask " << it->first << " is zero but is not first flag\n";
+ }
+ }
+ bitmasks[id] = sig;
+ }
+ assert(sig);
+
+ unsigned long long value = read_uint();
+
+ return new Bitmask(sig, value);
+}
+
+
+Value *Parser::parse_array(void) {
+ size_t len = read_uint();
+ Array *array = new Array(len);
+ for (size_t i = 0; i < len; ++i) {
+ array->values[i] = parse_value();
+ }
+ return array;
+}
+
+
+Value *Parser::parse_blob(void) {
+ size_t size = read_uint();
+ Blob *blob = new Blob(size);
+ if (size) {
+ gzread(file, blob->buf, (unsigned)size);
+ }
+ return blob;
+}
+
+
+Value *Parser::parse_struct() {
+ size_t id = read_uint();
+
+ Struct::Signature *sig = lookup(structs, id);
+ if (!sig) {
+ sig = new Struct::Signature;
+ sig->name = read_string();
+ unsigned size = read_uint();
+ for (unsigned i = 0; i < size; ++i) {
+ sig->member_names.push_back(read_string());
+ }
+ structs[id] = sig;
+ }
+ assert(sig);
+
+ Struct *value = new Struct(sig);
+
+ for (size_t i = 0; i < sig->member_names.size(); ++i) {
+ value->members[i] = parse_value();
+ }
+
+ return value;
+}
+
+
+Value *Parser::parse_opaque() {
+ unsigned long long addr;
+ addr = read_uint();
+ return new Pointer(addr);
+}
+
+
+std::string Parser::read_string(void) {
+ size_t len = read_uint();
+ if (!len) {
+ return std::string();
+ }
+ char * buf = new char[len];
+ gzread(file, buf, (unsigned)len);
+ std::string value(buf, len);
+ delete [] buf;
+#if TRACE_VERBOSE
+ std::cerr << "\tSTRING \"" << value << "\"\n";
+#endif
+ return value;
+}
+
+
+unsigned long long Parser::read_uint(void) {
+ unsigned long long value = 0;
+ int c;
+ unsigned shift = 0;
+ do {
+ c = gzgetc(file);
+ if (c == -1) {
+ break;
+ }
+ value |= (unsigned long long)(c & 0x7f) << shift;
+ shift += 7;
+ } while(c & 0x80);
+#if TRACE_VERBOSE
+ std::cerr << "\tUINT " << value << "\n";
+#endif
+ return value;
+}
+
+
+inline int Parser::read_byte(void) {
+ int c = gzgetc(file);
+#if TRACE_VERBOSE
+ if (c < 0)
+ std::cerr << "\tEOF" << "\n";
+ else
+ std::cerr << "\tBYTE 0x" << std::hex << c << std::dec << "\n";
+#endif
+ return c;
+}
} /* namespace Trace */
projects / apitrace / blobdiff