src/bin/debug/strace/Context.h

   1 /*
   2  * Copyright 2007, Haiku Inc. All rights reserved.
   3  * Distributed under the terms of the MIT License.
   4  *
   5  * Authors:
   6  *              Hugo Santos <hugosantos@gmail.com>
   7  *              Ingo Weinhold <bonefish@cs.tu-berlin.de>
   8  */
   9 #ifndef STRACE_CONTEXT_H
  10 #define STRACE_CONTEXT_H
  11
  12 #include "Syscall.h"
  13
  14 class Context {
  15 public:
  16         enum {
  17                 STRINGS         = 1 << 0,
  18                 ENUMERATIONS    = 1 << 1,
  19                 SIMPLE_STRUCTS  = 1 << 2,
  20                 COMPLEX_STRUCTS = 1 << 3,
  21                 POINTER_VALUES  = 1 << 4,
  22                 ALL             = 0xffffffff
  23         };
  24
  25         Context(Syscall *sc, char *data, MemoryReader &reader,
  26                 uint32 flags, bool decimal)
  27                 : fSyscall(sc), fData(data), fReader(reader),
  28                   fFlags(flags), fDecimal(decimal) {}
  29
  30         Parameter *GetSibling(int32 index) const {
  31                 return fSyscall->ParameterAt(index);
  32         }
  33
  34         const void *GetValue(Parameter *param) const {
  35                 return fData + param->Offset();
  36         }
  37
  38         MemoryReader &Reader() { return fReader; }
  39         bool GetContents(uint32 what) const { return fFlags & what; }
  40
  41         string FormatSigned(int64 value, int bytes = 8) const;
  42         string FormatUnsigned(uint64 value) const;
  43         string FormatFlags(uint64 value) const;
  44
  45         string FormatPointer(const void *address) const;
  46
  47 private:
  48         Syscall *fSyscall;
  49         char *fData;
  50         MemoryReader &fReader;
  51         uint32 fFlags;
  52         bool fDecimal;
  53 };
  54
  55 #endif  // STRACE_CONTEXT_H