Home | History | Annotate | Download | only in qtools 
      1 // Copyright 2006 The Android Open Source Project
      2 
      3 #include <stdio.h>
      4 #include <unistd.h>
      5 #include <stdlib.h>
      6 #include <inttypes.h>
      7 #include <assert.h>
      8 #include "trace_reader.h"
      9 #include "gtrace.h"
     10 #include "bitvector.h"
     11 #include "parse_options.h"
     12 
     13 struct symbol {
     14   int		filenum;	// the file number (for gtrace)
     15   int		procnum;	// the procedure number (for gtrace)
     16 };
     17 
     18 typedef TraceReader<symbol> TraceReaderType;
     19 
     20 #include "parse_options-inl.h"
     21 
     22 const int kMaxProcNum = 4095;
     23 int next_filenum = 1;
     24 int next_procnum = 1;
     25 
     26 void Usage(const char *program)
     27 {
     28   fprintf(stderr, "Usage: %s [options] trace_file elf_file gtrace_file\n",
     29           program);
     30   OptionsUsage();
     31 }
     32 
     33 int main(int argc, char **argv)
     34 {
     35   ParseOptions(argc, argv);
     36   if (argc - optind != 3) {
     37     Usage(argv[0]);
     38     exit(1);
     39   }
     40 
     41   char *qemu_trace_file = argv[optind++];
     42   char *elf_file = argv[optind++];
     43   char *gtrace_file = argv[optind++];
     44   TraceReader<symbol> *trace = new TraceReader<symbol>;
     45   trace->Open(qemu_trace_file);
     46   trace->ReadKernelSymbols(elf_file);
     47   trace->SetRoot(root);
     48   TraceHeader *qheader = trace->GetHeader();
     49 
     50   // Get the first valid event to get the process id for the gtrace header.
     51   BBEvent event;
     52   BBEvent ignored;
     53   symbol_type *sym;
     54   if (GetNextValidEvent(trace, &event, &ignored, &sym))
     55     return 0;
     56 
     57   Gtrace *gtrace = new Gtrace;
     58   gtrace->Open(gtrace_file, qheader->pdate, qheader->ptime);
     59   gtrace->WriteFirstHeader(qheader->start_sec, event.pid);
     60 
     61   symbol_type *prev_sym = NULL;
     62   bool eof = false;
     63   while (!eof) {
     64     if (sym != prev_sym) {
     65       // This procedure is different from the previous procedure.
     66 
     67       // If we have never seen this symbol before, then add it to the
     68       // list of known procedures.
     69       if (sym->filenum == 0) {
     70         sym->filenum = next_filenum;
     71         sym->procnum = next_procnum;
     72         gtrace->AddProcedure(sym->filenum, sym->procnum, sym->name);
     73         next_procnum += 1;
     74         if (next_procnum > kMaxProcNum) {
     75           next_filenum += 1;
     76           next_procnum = 1;
     77         }
     78       }
     79 
     80       // If we haven't yet recorded the procedure exit for the previous
     81       // procedure, then do it now.
     82       if (prev_sym) {
     83         gtrace->AddProcExit(prev_sym->filenum, prev_sym->procnum, event.time,
     84                             event.pid);
     85       }
     86 
     87       // If this is not the terminating record, then record a procedure
     88       // entry.
     89       if (event.bb_num != 0) {
     90         gtrace->AddProcEntry(sym->filenum, sym->procnum, event.time, event.pid);
     91         prev_sym = sym;
     92       }
     93     }
     94 
     95     eof = GetNextValidEvent(trace, &event, &ignored, &sym);
     96     if (ignored.time != 0 && prev_sym) {
     97       // We read an event that we are ignoring.
     98       // If we haven't already recorded a procedure exit, then do so.
     99       gtrace->AddProcExit(prev_sym->filenum, prev_sym->procnum, ignored.time,
    100                           ignored.pid);
    101       prev_sym = NULL;
    102     }
    103   }
    104 
    105   delete gtrace;
    106   delete trace;
    107   return 0;
    108 }
    109