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// task finder for user tapsets
// Copyright (C) 2005-2009 Red Hat Inc.
// Copyright (C) 2005-2007 Intel Corporation.
// Copyright (C) 2008 James.Bottomley@HansenPartnership.com
//
// 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.
#include "session.h"
#include "tapsets.h"
#include "task_finder.h"
#include "translate.h"
#include "util.h"
#include <cstring>
#include <string>
using namespace std;
using namespace __gnu_cxx;
// ------------------------------------------------------------------------
// task_finder derived 'probes': These don't really exist. The whole
// purpose of the task_finder_derived_probe_group is to make sure that
// stap_start_task_finder()/stap_stop_task_finder() get called only
// once and in the right place.
// ------------------------------------------------------------------------
struct task_finder_derived_probe: public derived_probe
{
// Dummy constructor for gcc 3.4 compatibility
task_finder_derived_probe (): derived_probe (0) { assert(0); }
};
struct task_finder_derived_probe_group: public generic_dpg<task_finder_derived_probe>
{
public:
void emit_module_decls (systemtap_session& ) { }
void emit_module_init (systemtap_session& s);
void emit_module_exit (systemtap_session& s);
};
void
task_finder_derived_probe_group::emit_module_init (systemtap_session& s)
{
s.op->newline();
s.op->newline() << "/* ---- task finder ---- */";
s.op->newline() << "rc = stap_start_task_finder();";
s.op->newline() << "if (rc) {";
s.op->newline(1) << "stap_stop_task_finder();";
s.op->newline(-1) << "}";
}
void
task_finder_derived_probe_group::emit_module_exit (systemtap_session& s)
{
s.op->newline();
s.op->newline() << "/* ---- task finder ---- */";
s.op->newline() << "stap_stop_task_finder();";
}
// Declare that task_finder is needed in this session
void
enable_task_finder(systemtap_session& s)
{
if (! s.task_finder_derived_probes)
s.task_finder_derived_probes = new task_finder_derived_probe_group();
}
// Helper function to emit vma tracker callbacks.
void
emit_vma_callback_probe_decl (systemtap_session& s,
string path,
int64_t pid)
{
s.op->newline() << "{";
if (pid == 0)
{
s.op->line() << " .pathname=\"" << path << "\",";
s.op->line() << " .pid=0,";
}
else
{
s.op->line() << " .pathname=NULL,";
s.op->line() << " .pid=" << pid << ",";
}
s.op->line() << " .callback=NULL,";
s.op->line() << " .mmap_callback=&_stp_tf_mmap_cb,";
s.op->line() << " .munmap_callback=&_stp_tf_munmap_cb,";
s.op->line() << " .mprotect_callback=NULL,";
s.op->line() << " },";
}
/* vim: set sw=2 ts=8 cino=>4,n-2,{2,^-2,t0,(0,u0,w1,M1 : */
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