diff options
Diffstat (limited to 'source/Plugins/Process/Windows/Common/ProcessWindowsLog.cpp')
| -rw-r--r-- | source/Plugins/Process/Windows/Common/ProcessWindowsLog.cpp | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/source/Plugins/Process/Windows/Common/ProcessWindowsLog.cpp b/source/Plugins/Process/Windows/Common/ProcessWindowsLog.cpp new file mode 100644 index 000000000000..47722c5146b2 --- /dev/null +++ b/source/Plugins/Process/Windows/Common/ProcessWindowsLog.cpp @@ -0,0 +1,194 @@ +//===-- 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 = ""; |