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// -*- C++ -*-
// Copyright (C) 2005, 2009 Red Hat Inc.
//
// This file is part of systemtap, and is free software. You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.
#ifndef TRANSLATE_H
#define TRANSLATE_H
#include "staptree.h"
#include "parse.h"
#include <iostream>
#include <fstream>
// ------------------------------------------------------------------------
// Output context for systemtap translation, intended to allow
// pretty-printing.
class translator_output
{
char *buf;
std::ofstream* o2;
std::ostream& o;
unsigned tablevel;
public:
translator_output (std::ostream& file);
translator_output (const std::string& filename, size_t bufsize = 8192);
~translator_output ();
std::ostream& newline (int indent = 0);
void indent (int indent = 0);
void assert_0_indent () { o << std::flush; assert (tablevel == 0); }
std::ostream& line();
std::ostream::pos_type tellp() { return o.tellp(); }
std::ostream& seekp(std::ostream::pos_type p) { return o.seekp(p); }
};
// An unparser instance is in charge of emitting code for generic
// probe bodies, functions, globals.
struct unparser
{
virtual ~unparser () {}
virtual void emit_common_header () = 0;
// #include<...>
//
// #define MAXNESTING nnn
// #define MAXCONCURRENCY mmm
// #define MAXSTRINGLEN ooo
//
// enum session_state_t {
// starting, begin, running, suspended, errored, ending, ended
// };
// static atomic_t session_state;
//
// struct context {
// unsigned errorcount;
// unsigned busy;
// ...
// } context [MAXCONCURRENCY];
// struct {
virtual void emit_global (vardecl* v) = 0;
// TYPE s_NAME; // NAME is prefixed with "s_" to avoid kernel id collisions
// rwlock_t s_NAME_lock;
// } global = {
virtual void emit_global_init (vardecl* v) = 0;
// };
virtual void emit_global_param (vardecl* v) = 0;
// module_param_... -- at end of file
virtual void emit_functionsig (functiondecl* v) = 0;
// static void function_NAME (context* c);
virtual void emit_module_init () = 0;
virtual void emit_module_exit () = 0;
// XXX
virtual void emit_function (functiondecl* v) = 0;
// void function_NAME (struct context* c) {
// ....
// }
virtual void emit_probe (derived_probe* v) = 0;
// void probe_NUMBER (struct context* c) {
// ... lifecycle
// ....
// }
// ... then call over to the derived_probe's emit_probe_entries() fn
};
int translate_pass (systemtap_session& s);
#endif // TRANSLATE_H
/* vim: set sw=2 ts=8 cino=>4,n-2,{2,^-2,t0,(0,u0,w1,M1 : */
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