kc3-lang/angle/util/windows/Windows_system_utils.cpp

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• Hash : 9d737966
  Author :
  Date : 2019-08-14T12:25:12
  

  Standardize copyright notices to project style
  
  For all "ANGLE Project" copyrights, standardize to the format specified
  by the style guide. Changes:
  - "Copyright (c)" and "Copyright(c)" changed to just "Copyright".
  - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1").
  - Fixed a small number of files that had no copyright date using the
    initial commit year from the version control history.
  - Fixed one instance of copyright being "The ANGLE Project" rather than
    "The ANGLE Project Authors"
  
  These changes are applied both to the copyright of source file, and
  where applicable to copyright statements that are generated by
  templates.
  
  BUG=angleproject:3811
  
  Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• util/windows/Windows_system_utils.cpp

• //
  // Copyright 2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // Windows_system_utils.cpp: Implementation of OS-specific functions for Windows
  
  #include "util/system_utils.h"
  
  #include <stdarg.h>
  #include <windows.h>
  #include <array>
  #include <vector>
  
  #include "util/windows/third_party/StackWalker/src/StackWalker.h"
  
  namespace angle
  {
  namespace
  {
  static const struct
  {
      const char *name;
      const DWORD code;
  } kExceptions[] = {
  #define _(E)  \
      {         \
  #        E, E \
      }
      _(EXCEPTION_ACCESS_VIOLATION),
      _(EXCEPTION_BREAKPOINT),
      _(EXCEPTION_INT_DIVIDE_BY_ZERO),
      _(EXCEPTION_STACK_OVERFLOW),
  #undef _
  };
  
  class CustomStackWalker : public StackWalker
  {
    public:
      CustomStackWalker() {}
      ~CustomStackWalker() {}
  
      void OnCallstackEntry(CallstackEntryType eType, CallstackEntry &entry) override
      {
          char buffer[STACKWALK_MAX_NAMELEN];
          size_t maxLen = _TRUNCATE;
          if ((eType != lastEntry) && (entry.offset != 0))
          {
              if (entry.name[0] == 0)
                  strncpy_s(entry.name, STACKWALK_MAX_NAMELEN, "(function-name not available)",
                            _TRUNCATE);
              if (entry.undName[0] != 0)
                  strncpy_s(entry.name, STACKWALK_MAX_NAMELEN, entry.undName, _TRUNCATE);
              if (entry.undFullName[0] != 0)
                  strncpy_s(entry.name, STACKWALK_MAX_NAMELEN, entry.undFullName, _TRUNCATE);
              if (entry.lineFileName[0] == 0)
              {
                  strncpy_s(entry.lineFileName, STACKWALK_MAX_NAMELEN, "(filename not available)",
                            _TRUNCATE);
                  if (entry.moduleName[0] == 0)
                      strncpy_s(entry.moduleName, STACKWALK_MAX_NAMELEN,
                                "(module-name not available)", _TRUNCATE);
                  _snprintf_s(buffer, maxLen, "    %s - %p (%s): %s\n", entry.name,
                              reinterpret_cast<void *>(entry.offset), entry.moduleName,
                              entry.lineFileName);
              }
              else
                  _snprintf_s(buffer, maxLen, "    %s (%s:%d)\n", entry.name, entry.lineFileName,
                              entry.lineNumber);
              buffer[STACKWALK_MAX_NAMELEN - 1] = 0;
              printf("%s", buffer);
              OutputDebugStringA(buffer);
          }
      }
  };
  
  void PrintBacktrace(CONTEXT *c)
  {
      printf("Backtrace:\n");
      OutputDebugStringA("Backtrace:\n");
  
      CustomStackWalker sw;
      sw.ShowCallstack(GetCurrentThread(), c);
  }
  
  LONG WINAPI StackTraceCrashHandler(EXCEPTION_POINTERS *e)
  {
      const DWORD code = e->ExceptionRecord->ExceptionCode;
      printf("\nCaught exception %lu", code);
      for (size_t i = 0; i < ArraySize(kExceptions); i++)
      {
          if (kExceptions[i].code == code)
          {
              printf(" %s", kExceptions[i].name);
          }
      }
      printf("\n");
  
      PrintBacktrace(e->ContextRecord);
  
      // Exit NOW.  Don't notify other threads, don't call anything registered with atexit().
      _exit(1);
  
      // The compiler wants us to return something.  This is what we'd do if we didn't _exit().
      return EXCEPTION_EXECUTE_HANDLER;
  }
  }  // anonymous namespace
  
  void Sleep(unsigned int milliseconds)
  {
      ::Sleep(static_cast<DWORD>(milliseconds));
  }
  
  void WriteDebugMessage(const char *format, ...)
  {
      va_list args;
      va_start(args, format);
      int size = vsnprintf(nullptr, 0, format, args);
      va_end(args);
  
      std::vector<char> buffer(size + 2);
      va_start(args, format);
      vsnprintf(buffer.data(), size + 1, format, args);
      va_end(args);
  
      OutputDebugStringA(buffer.data());
  }
  
  void InitCrashHandler()
  {
      SetUnhandledExceptionFilter(StackTraceCrashHandler);
  }
  
  void TerminateCrashHandler()
  {
      SetUnhandledExceptionFilter(nullptr);
  }
  
  void PrintStackBacktrace()
  {
      CONTEXT context;
      ZeroMemory(&context, sizeof(CONTEXT));
      RtlCaptureContext(&context);
      PrintBacktrace(&context);
  }
  
  }  // namespace angle
  

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