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Code Issues Releases Wiki Activity

ircd::ctx: Add a syscall_usage_warning to suite.

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This commit is contained in:
Jason Volk 2019-04-10 14:50:34 -07:00
parent 9f07790b41
commit d8bf5b9fff
3 changed files with 89 additions and 0 deletions
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1
include/ircd/ctx/ctx.h
View file

@ -74,6 +74,7 @@ namespace ircd::ctx
#include "this_ctx.h"
#include "stack_usage_assertion.h"
#include "slice_usage_warning.h"
#include "syscall_usage_warning.h"
#include "critical_assertion.h"
#include "critical_indicator.h"
#include "exception_handler.h"

47
include/ircd/ctx/syscall_usage_warning.h Normal file
View file

@ -0,0 +1,47 @@
// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_CTX_SYSCALL_USAGE_WARNING_H
namespace ircd::ctx::this_ctx
{
struct syscall_usage_warning;
}
#ifndef NDEBUG
struct ircd::ctx::this_ctx::syscall_usage_warning
{
const string_view fmt;
const va_rtti ap;
ircd::prof::syscall_timer timer;
template<class... args>
syscall_usage_warning(const string_view &fmt, args&&... a)
:syscall_usage_warning{fmt, va_rtti{std::forward<args>(a)...}}
{}
explicit syscall_usage_warning(const string_view &fmt, va_rtti &&ap)
:fmt{fmt}
,ap{std::move(ap)}
{}
~syscall_usage_warning() noexcept;
};
#else
struct ircd::ctx::this_ctx::syscall_usage_warning
{
syscall_usage_warning(const string_view &fmt, ...)
{
// In at least gcc 6.3.0 20170519, template param packs are not DCE'ed
// so legacy varargs are used here.
}
};
#endif

41
ircd/ctx.cc
View file

@ -854,6 +854,47 @@ noexcept
}
#endif
///////////////////////////////////////////////////////////////////////////////
//
// ctx/syscall_usage_warning.h
//
#ifndef NDEBUG
ircd::ctx::this_ctx::syscall_usage_warning::~syscall_usage_warning()
noexcept
{
const uint64_t total
{
timer.stopped?
timer.at():
timer.stop()
};
if(likely(!total))
return;
thread_local char buf[512];
const string_view reason
{
fmt::vsprintf{buf, fmt, ap}
};
thread_local char tmbuf[64];
log::dwarning
{
log, "context '%s' id:%lu watchdog: system call took %s :%s",
current?
name(cur()):
ios::handler::current?
name(*ios::handler::current):
"*"_sv,
current? id(cur()) : 0,
pretty_nanoseconds(tmbuf, total, true),
reason
};
}
#endif
///////////////////////////////////////////////////////////////////////////////
//
// ctx/slice_usage_warning.h