kc3-lang/angle/src/common/system_utils_posix.cpp

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• Hash : 7df7fc7f
  Author :
  Date : 2021-06-20T00:05:28
  

  Tests: Add support for --renderdoc
  
  This change adds support for a new flag namely `--renderdoc` to end2end
  and deqp tests.  With this flag, each test automatically starts and ends
  a frame capture in renderdoc, working around an issue where renderdoc
  refuses to capture a test frame that doesn't start or end with a swap.
  
  With end2end tests, the capture starts before test set up, and ends
  after test tear down.  With deqp tests, it starts before init, ends and
  restarts after each test iteration and ends after deinit.
  
  Bug: angleproject:6072
  Change-Id: Ib41b816aff121bf922d9147044cc363c33a62181
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2971835
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Cody Northrop <cnorthrop@google.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/common/system_utils_posix.cpp

• //
  // Copyright 2018 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.
  //
  
  // system_utils_posix.cpp: Implementation of POSIX OS-specific functions.
  
  #include "system_utils.h"
  
  #include <array>
  #include <iostream>
  
  #include <dlfcn.h>
  #include <sys/stat.h>
  #include <sys/types.h>
  #include <sys/wait.h>
  #include <unistd.h>
  
  namespace angle
  {
  Optional<std::string> GetCWD()
  {
      std::array<char, 4096> pathBuf;
      char *result = getcwd(pathBuf.data(), pathBuf.size());
      if (result == nullptr)
      {
          return Optional<std::string>::Invalid();
      }
      return std::string(pathBuf.data());
  }
  
  bool SetCWD(const char *dirName)
  {
      return (chdir(dirName) == 0);
  }
  
  bool UnsetEnvironmentVar(const char *variableName)
  {
      return (unsetenv(variableName) == 0);
  }
  
  bool SetEnvironmentVar(const char *variableName, const char *value)
  {
      return (setenv(variableName, value, 1) == 0);
  }
  
  std::string GetEnvironmentVar(const char *variableName)
  {
      const char *value = getenv(variableName);
      return (value == nullptr ? std::string() : std::string(value));
  }
  
  const char *GetPathSeparatorForEnvironmentVar()
  {
      return ":";
  }
  
  std::string GetModuleDirectory()
  {
      std::string directory;
      static int placeholderSymbol = 0;
      Dl_info dlInfo;
      if (dladdr(&placeholderSymbol, &dlInfo) != 0)
      {
          std::string moduleName = dlInfo.dli_fname;
          directory              = moduleName.substr(0, moduleName.find_last_of('/') + 1);
      }
      // Ensure we return the full path to the module, not the relative path
      Optional<std::string> cwd = GetCWD();
      if (cwd.valid() && !IsFullPath(directory))
      {
          directory = ConcatenatePath(cwd.value(), directory);
      }
      return directory;
  }
  
  class PosixLibrary : public Library
  {
    public:
      PosixLibrary(const std::string &fullPath, int extraFlags)
          : mModule(dlopen(fullPath.c_str(), RTLD_NOW | extraFlags))
      {}
  
      ~PosixLibrary() override
      {
          if (mModule)
          {
              dlclose(mModule);
          }
      }
  
      void *getSymbol(const char *symbolName) override
      {
          if (!mModule)
          {
              return nullptr;
          }
  
          return dlsym(mModule, symbolName);
      }
  
      void *getNative() const override { return mModule; }
  
    private:
      void *mModule = nullptr;
  };
  
  Library *OpenSharedLibrary(const char *libraryName, SearchType searchType)
  {
      std::string directory;
      if (searchType == SearchType::ApplicationDir)
      {
  #if ANGLE_PLATFORM_IOS
          // On iOS, shared libraries must be loaded from within the app bundle.
          directory = GetExecutableDirectory() + "/Frameworks/";
  #else
          directory = GetModuleDirectory();
  #endif
      }
  
      int extraFlags = 0;
      if (searchType == SearchType::AlreadyLoaded)
      {
          extraFlags = RTLD_NOLOAD;
      }
  
      std::string fullPath = directory + libraryName + "." + GetSharedLibraryExtension();
  #if ANGLE_PLATFORM_IOS
      // On iOS, dlopen needs a suffix on the framework name to work.
      fullPath = fullPath + "/" + libraryName;
  #endif
      return new PosixLibrary(fullPath, extraFlags);
  }
  
  Library *OpenSharedLibraryWithExtension(const char *libraryName)
  {
      return new PosixLibrary(libraryName, 0);
  }
  
  bool IsDirectory(const char *filename)
  {
      struct stat st;
      int result = stat(filename, &st);
      return result == 0 && ((st.st_mode & S_IFDIR) == S_IFDIR);
  }
  
  bool IsDebuggerAttached()
  {
      // This could have a fuller implementation.
      // See https://cs.chromium.org/chromium/src/base/debug/debugger_posix.cc
      return false;
  }
  
  void BreakDebugger()
  {
      // This could have a fuller implementation.
      // See https://cs.chromium.org/chromium/src/base/debug/debugger_posix.cc
      abort();
  }
  
  const char *GetExecutableExtension()
  {
      return "";
  }
  
  char GetPathSeparator()
  {
      return '/';
  }
  
  std::string GetRootDirectory()
  {
      return "/";
  }
  }  // namespace angle
  

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