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//===-- ProcessWindowsLog.cpp -----------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "ProcessWindowsLog.h"
#include <mutex>
#include "lldb/Core/StreamFile.h"
#include "lldb/Interpreter/Args.h"
#include "llvm/Support/ManagedStatic.h"
using namespace lldb;
using namespace lldb_private;
// We want to avoid global constructors where code needs to be run so here we
// control access to our static g_log_sp by hiding it in a singleton function
// that will construct the static g_log_sp the first time this function is
// called.
static bool g_log_enabled = false;
static Log * g_log = nullptr;
static llvm::ManagedStatic<std::once_flag> g_once_flag;
void
ProcessWindowsLog::Initialize()
{
static ConstString g_name("windows");
std::call_once(*g_once_flag, [](){
Log::Callbacks log_callbacks = {
DisableLog,
EnableLog,
ListLogCategories
};
Log::RegisterLogChannel(g_name, log_callbacks);
RegisterPluginName(g_name);
});
}
void
ProcessWindowsLog::Terminate()
{
}
Log *
ProcessWindowsLog::GetLog()
{
return (g_log_enabled) ? g_log : nullptr;
}
bool
ProcessWindowsLog::TestLogFlags(uint32_t mask, LogMaskReq req)
{
Log *log = GetLog();
if (!log)
return false;
uint32_t log_mask = log->GetMask().Get();
if (req == LogMaskReq::All)
return ((log_mask & mask) == mask);
else
return (log_mask & mask);
}
static uint32_t
GetFlagBits(const char *arg)
{
if (::strcasecmp(arg, "all") == 0 ) return WINDOWS_LOG_ALL;
else if (::strcasecmp(arg, "break") == 0 ) return WINDOWS_LOG_BREAKPOINTS;
else if (::strcasecmp(arg, "event") == 0 ) return WINDOWS_LOG_EVENT;
else if (::strcasecmp(arg, "exception") == 0 ) return WINDOWS_LOG_EXCEPTION;
else if (::strcasecmp(arg, "memory") == 0 ) return WINDOWS_LOG_MEMORY;
else if (::strcasecmp(arg, "process") == 0 ) return WINDOWS_LOG_PROCESS;
else if (::strcasecmp(arg, "registers") == 0 ) return WINDOWS_LOG_REGISTERS;
else if (::strcasecmp(arg, "step") == 0 ) return WINDOWS_LOG_STEP;
else if (::strcasecmp(arg, "thread") == 0 ) return WINDOWS_LOG_THREAD;
else if (::strcasecmp(arg, "verbose") == 0 ) return WINDOWS_LOG_VERBOSE;
return 0;
}
void
ProcessWindowsLog::DisableLog(const char **args, Stream *feedback_strm)
{
Log *log (GetLog());
if (log)
{
uint32_t flag_bits = 0;
if (args[0] != nullptr)
{
flag_bits = log->GetMask().Get();
for (; args[0]; args++)
{
const char *arg = args[0];
uint32_t bits = GetFlagBits(arg);
if (bits)
{
flag_bits &= ~bits;
}
else
{
feedback_strm->Printf("error: unrecognized log category '%s'\n", arg);
ListLogCategories(feedback_strm);
}
}
}
log->GetMask().Reset(flag_bits);
if (flag_bits == 0)
{
g_log_enabled = false;
log->SetStream(lldb::StreamSP());
}
}
return;
}
Log *
ProcessWindowsLog::EnableLog(StreamSP &log_stream_sp, uint32_t log_options, const char **args, Stream *feedback_strm)
{
// Try see if there already is a log - that way we can reuse its settings.
// We could reuse the log in toto, but we don't know that the stream is the same.
uint32_t flag_bits = 0;
if (g_log)
flag_bits = g_log->GetMask().Get();
// Now make a new log with this stream if one was provided
if (log_stream_sp)
{
if (g_log)
g_log->SetStream(log_stream_sp);
else
g_log = new Log(log_stream_sp);
}
if (g_log)
{
bool got_unknown_category = false;
for (; args[0]; args++)
{
const char *arg = args[0];
uint32_t bits = GetFlagBits(arg);
if (bits)
{
flag_bits |= bits;
}
else
{
feedback_strm->Printf("error: unrecognized log category '%s'\n", arg);
if (got_unknown_category == false)
{
got_unknown_category = true;
ListLogCategories (feedback_strm);
}
}
}
if (flag_bits == 0)
flag_bits = WINDOWS_LOG_ALL;
g_log->GetMask().Reset(flag_bits);
g_log->GetOptions().Reset(log_options);
g_log_enabled = true;
}
return g_log;
}
void
ProcessWindowsLog::ListLogCategories(Stream *strm)
{
strm->Printf("Logging categories for '%s':\n"
" all - turn on all available logging categories\n"
" break - log breakpoints\n"
" event - log low level debugger events\n"
" exception - log exception information\n"
" memory - log memory reads and writes\n"
" process - log process events and activities\n"
" registers - log register read/writes\n"
" thread - log thread events and activities\n"
" step - log step related activities\n"
" verbose - enable verbose logging\n",
ProcessWindowsLog::m_pluginname);
}
const char *ProcessWindowsLog::m_pluginname = "";
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