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930 lines
29 KiB
D
930 lines
29 KiB
D
/**
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* The runtime module exposes information specific to the D runtime code.
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*
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* Copyright: Copyright Sean Kelly 2005 - 2009.
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* License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
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* Authors: Sean Kelly
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* Source: $(DRUNTIMESRC core/_runtime.d)
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*/
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/* Copyright Sean Kelly 2005 - 2009.
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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/* NOTE: This file has been patched from the original DMD distribution to
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* work with the GDC compiler.
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*/
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module core.runtime;
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version (Windows) import core.stdc.wchar_ : wchar_t;
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version (OSX)
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version = Darwin;
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else version (iOS)
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version = Darwin;
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else version (TVOS)
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version = Darwin;
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else version (WatchOS)
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version = Darwin;
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/// C interface for Runtime.loadLibrary
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extern (C) void* rt_loadLibrary(const char* name);
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/// ditto
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version (Windows) extern (C) void* rt_loadLibraryW(const wchar_t* name);
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/// C interface for Runtime.unloadLibrary, returns 1/0 instead of bool
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extern (C) int rt_unloadLibrary(void* ptr);
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/// C interface for Runtime.initialize, returns 1/0 instead of bool
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extern(C) int rt_init();
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/// C interface for Runtime.terminate, returns 1/0 instead of bool
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extern(C) int rt_term();
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private
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{
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alias bool function() ModuleUnitTester;
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alias bool function(Object) CollectHandler;
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alias Throwable.TraceInfo function( void* ptr ) TraceHandler;
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extern (C) void rt_setCollectHandler( CollectHandler h );
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extern (C) CollectHandler rt_getCollectHandler();
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extern (C) void rt_setTraceHandler( TraceHandler h );
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extern (C) TraceHandler rt_getTraceHandler();
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alias void delegate( Throwable ) ExceptionHandler;
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extern (C) void _d_print_throwable(Throwable t);
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extern (C) void* thread_stackBottom();
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extern (C) string[] rt_args();
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extern (C) CArgs rt_cArgs() @nogc;
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}
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static this()
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{
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// NOTE: Some module ctors will run before this handler is set, so it's
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// still possible the app could exit without a stack trace. If
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// this becomes an issue, the handler could be set in C main
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// before the module ctors are run.
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Runtime.traceHandler = &defaultTraceHandler;
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}
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///////////////////////////////////////////////////////////////////////////////
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// Runtime
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///////////////////////////////////////////////////////////////////////////////
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/**
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* Stores the unprocessed arguments supplied when the
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* process was started.
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*/
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struct CArgs
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{
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int argc; /// The argument count.
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char** argv; /// The arguments as a C array of strings.
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}
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/**
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* This struct encapsulates all functionality related to the underlying runtime
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* module for the calling context.
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*/
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struct Runtime
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{
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/**
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* Initializes the runtime. This call is to be used in instances where the
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* standard program initialization process is not executed. This is most
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* often in shared libraries or in libraries linked to a C program.
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* If the runtime was already successfully initialized this returns true.
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* Each call to initialize must be paired by a call to $(LREF terminate).
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*
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* Returns:
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* true if initialization succeeded or false if initialization failed.
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*/
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static bool initialize()
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{
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return !!rt_init();
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}
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deprecated("Please use the overload of Runtime.initialize that takes no argument.")
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static bool initialize(ExceptionHandler dg = null)
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{
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return !!rt_init();
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}
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/**
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* Terminates the runtime. This call is to be used in instances where the
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* standard program termination process will not be not executed. This is
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* most often in shared libraries or in libraries linked to a C program.
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* If the runtime was not successfully initialized the function returns false.
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*
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* Returns:
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* true if termination succeeded or false if termination failed.
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*/
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static bool terminate()
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{
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return !!rt_term();
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}
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deprecated("Please use the overload of Runtime.terminate that takes no argument.")
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static bool terminate(ExceptionHandler dg = null)
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{
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return !!rt_term();
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}
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/**
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* Returns the arguments supplied when the process was started.
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*
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* Returns:
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* The arguments supplied when this process was started.
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*/
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static @property string[] args()
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{
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return rt_args();
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}
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/**
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* Returns the unprocessed C arguments supplied when the process was started.
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* Use this when you need to supply argc and argv to C libraries.
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*
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* Returns:
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* A $(LREF CArgs) struct with the arguments supplied when this process was started.
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*
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* Example:
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* ---
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* import core.runtime;
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*
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* // A C library function requiring char** arguments
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* extern(C) void initLibFoo(int argc, char** argv);
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*
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* void main()
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* {
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* auto args = Runtime.cArgs;
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* initLibFoo(args.argc, args.argv);
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* }
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* ---
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*/
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static @property CArgs cArgs() @nogc
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{
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return rt_cArgs();
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}
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/**
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* Locates a dynamic library with the supplied library name and dynamically
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* loads it into the caller's address space. If the library contains a D
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* runtime it will be integrated with the current runtime.
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*
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* Params:
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* name = The name of the dynamic library to load.
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*
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* Returns:
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* A reference to the library or null on error.
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*/
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static void* loadLibrary()(in char[] name)
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{
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import core.stdc.stdlib : free, malloc;
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version (Windows)
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{
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import core.sys.windows.windows;
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if (name.length == 0) return null;
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// Load a DLL at runtime
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auto len = MultiByteToWideChar(
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CP_UTF8, 0, name.ptr, cast(int)name.length, null, 0);
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if (len == 0)
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return null;
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auto buf = cast(wchar_t*)malloc((len+1) * wchar_t.sizeof);
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if (buf is null) return null;
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scope (exit) free(buf);
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len = MultiByteToWideChar(
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CP_UTF8, 0, name.ptr, cast(int)name.length, buf, len);
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if (len == 0)
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return null;
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buf[len] = '\0';
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return rt_loadLibraryW(buf);
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}
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else version (Posix)
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{
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/* Need a 0-terminated C string for the dll name
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*/
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immutable len = name.length;
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auto buf = cast(char*)malloc(len + 1);
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if (!buf) return null;
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scope (exit) free(buf);
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buf[0 .. len] = name[];
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buf[len] = 0;
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return rt_loadLibrary(buf);
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}
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}
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/**
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* Unloads the dynamic library referenced by p. If this library contains a
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* D runtime then any necessary finalization or cleanup of that runtime
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* will be performed.
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*
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* Params:
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* p = A reference to the library to unload.
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*/
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static bool unloadLibrary()(void* p)
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{
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return !!rt_unloadLibrary(p);
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}
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/**
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* Overrides the default trace mechanism with a user-supplied version. A
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* trace represents the context from which an exception was thrown, and the
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* trace handler will be called when this occurs. The pointer supplied to
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* this routine indicates the base address from which tracing should occur.
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* If the supplied pointer is null then the trace routine should determine
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* an appropriate calling context from which to begin the trace.
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*
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* Params:
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* h = The new trace handler. Set to null to use the default handler.
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*/
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static @property void traceHandler( TraceHandler h )
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{
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rt_setTraceHandler( h );
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}
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/**
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* Gets the current trace handler.
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*
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* Returns:
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* The current trace handler or null if none has been set.
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*/
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static @property TraceHandler traceHandler()
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{
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return rt_getTraceHandler();
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}
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/**
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* Overrides the default collect hander with a user-supplied version. This
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* routine will be called for each resource object that is finalized in a
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* non-deterministic manner--typically during a garbage collection cycle.
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* If the supplied routine returns true then the object's dtor will called
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* as normal, but if the routine returns false than the dtor will not be
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* called. The default behavior is for all object dtors to be called.
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*
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* Params:
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* h = The new collect handler. Set to null to use the default handler.
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*/
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static @property void collectHandler( CollectHandler h )
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{
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rt_setCollectHandler( h );
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}
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/**
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* Gets the current collect handler.
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*
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* Returns:
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* The current collect handler or null if none has been set.
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*/
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static @property CollectHandler collectHandler()
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{
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return rt_getCollectHandler();
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}
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/**
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* Overrides the default module unit tester with a user-supplied version.
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* This routine will be called once on program initialization. The return
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* value of this routine indicates to the runtime whether the tests ran
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* without error.
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*
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* Params:
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* h = The new unit tester. Set to null to use the default unit tester.
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*
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* Example:
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* ---------
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* version (unittest) shared static this()
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* {
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* import core.runtime;
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*
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* Runtime.moduleUnitTester = &customModuleUnitTester;
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* }
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*
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* bool customModuleUnitTester()
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* {
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* import std.stdio;
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*
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* writeln("Using customModuleUnitTester");
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*
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* // Do the same thing as the default moduleUnitTester:
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* size_t failed = 0;
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* foreach (m; ModuleInfo)
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* {
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* if (m)
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* {
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* auto fp = m.unitTest;
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*
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* if (fp)
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* {
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* try
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* {
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* fp();
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* }
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* catch (Throwable e)
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* {
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* writeln(e);
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* failed++;
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* }
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* }
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* }
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* }
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* return failed == 0;
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* }
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* ---------
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*/
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static @property void moduleUnitTester( ModuleUnitTester h )
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{
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sm_moduleUnitTester = h;
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}
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/**
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* Gets the current module unit tester.
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*
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* Returns:
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* The current module unit tester handler or null if none has been set.
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*/
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static @property ModuleUnitTester moduleUnitTester()
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{
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return sm_moduleUnitTester;
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}
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private:
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// NOTE: This field will only ever be set in a static ctor and should
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// never occur within any but the main thread, so it is safe to
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// make it __gshared.
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__gshared ModuleUnitTester sm_moduleUnitTester = null;
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}
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/**
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* Set source file path for coverage reports.
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*
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* Params:
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* path = The new path name.
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* Note:
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* This is a dmd specific setting.
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*/
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extern (C) void dmd_coverSourcePath(string path);
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/**
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* Set output path for coverage reports.
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*
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* Params:
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* path = The new path name.
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* Note:
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* This is a dmd specific setting.
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*/
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extern (C) void dmd_coverDestPath(string path);
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/**
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* Enable merging of coverage reports with existing data.
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*
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* Params:
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* flag = enable/disable coverage merge mode
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* Note:
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* This is a dmd specific setting.
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*/
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extern (C) void dmd_coverSetMerge(bool flag);
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/**
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* Set the output file name for profile reports (-profile switch).
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* An empty name will set the output to stdout.
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*
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* Params:
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* name = file name
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* Note:
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* This is a dmd specific setting.
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*/
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extern (C) void trace_setlogfilename(string name);
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/**
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* Set the output file name for the optimized profile linker DEF file (-profile switch).
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* An empty name will set the output to stdout.
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*
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* Params:
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* name = file name
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* Note:
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* This is a dmd specific setting.
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*/
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extern (C) void trace_setdeffilename(string name);
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/**
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* Set the output file name for memory profile reports (-profile=gc switch).
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* An empty name will set the output to stdout.
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*
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* Params:
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* name = file name
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* Note:
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* This is a dmd specific setting.
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*/
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extern (C) void profilegc_setlogfilename(string name);
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///////////////////////////////////////////////////////////////////////////////
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// Overridable Callbacks
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///////////////////////////////////////////////////////////////////////////////
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/**
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* This routine is called by the runtime to run module unit tests on startup.
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* The user-supplied unit tester will be called if one has been supplied,
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* otherwise all unit tests will be run in sequence.
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*
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* Returns:
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* true if execution should continue after testing is complete and false if
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* not. Default behavior is to return true.
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*/
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extern (C) bool runModuleUnitTests()
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{
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// backtrace
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version (GNU)
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import gcc.backtrace;
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version (CRuntime_Glibc)
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import core.sys.linux.execinfo;
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else version (Darwin)
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import core.sys.darwin.execinfo;
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else version (FreeBSD)
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import core.sys.freebsd.execinfo;
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else version (NetBSD)
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import core.sys.netbsd.execinfo;
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else version (DragonFlyBSD)
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import core.sys.dragonflybsd.execinfo;
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else version (Windows)
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import core.sys.windows.stacktrace;
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else version (Solaris)
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import core.sys.solaris.execinfo;
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else version (CRuntime_UClibc)
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import core.sys.linux.execinfo;
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static if ( __traits( compiles, new LibBacktrace(0) ) )
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{
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import core.sys.posix.signal; // segv handler
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static extern (C) void unittestSegvHandler( int signum, siginfo_t* info, void* ptr )
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{
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import core.stdc.stdio;
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fprintf(stderr, "Segmentation fault while running unittests:\n");
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fprintf(stderr, "----------------\n");
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enum alignment = LibBacktrace.MaxAlignment;
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enum classSize = __traits(classInstanceSize, LibBacktrace);
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void[classSize + alignment] bt_store = void;
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void* alignedAddress = cast(byte*)((cast(size_t)(bt_store.ptr + alignment - 1))
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& ~(alignment - 1));
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(alignedAddress[0 .. classSize]) = typeid(LibBacktrace).initializer[];
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auto bt = cast(LibBacktrace)(alignedAddress);
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// First frame is LibBacktrace ctor. Second is signal handler, but include that for now
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bt.__ctor(1);
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foreach (size_t i, const(char[]) msg; bt)
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fprintf(stderr, "%s\n", msg.ptr ? msg.ptr : "???");
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}
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sigaction_t action = void;
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sigaction_t oldseg = void;
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sigaction_t oldbus = void;
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(cast(byte*) &action)[0 .. action.sizeof] = 0;
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sigfillset( &action.sa_mask ); // block other signals
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action.sa_flags = SA_SIGINFO | SA_RESETHAND;
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action.sa_sigaction = &unittestSegvHandler;
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sigaction( SIGSEGV, &action, &oldseg );
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sigaction( SIGBUS, &action, &oldbus );
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scope( exit )
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{
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sigaction( SIGSEGV, &oldseg, null );
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sigaction( SIGBUS, &oldbus, null );
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}
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}
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else static if ( __traits( compiles, backtrace ) )
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{
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import core.sys.posix.signal; // segv handler
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static extern (C) void unittestSegvHandler( int signum, siginfo_t* info, void* ptr ) nothrow
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{
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static enum MAXFRAMES = 128;
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void*[MAXFRAMES] callstack;
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auto numframes = backtrace( callstack.ptr, MAXFRAMES );
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backtrace_symbols_fd( callstack.ptr, numframes, 2 );
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}
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sigaction_t action = void;
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sigaction_t oldseg = void;
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sigaction_t oldbus = void;
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(cast(byte*) &action)[0 .. action.sizeof] = 0;
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sigfillset( &action.sa_mask ); // block other signals
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action.sa_flags = SA_SIGINFO | SA_RESETHAND;
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action.sa_sigaction = &unittestSegvHandler;
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sigaction( SIGSEGV, &action, &oldseg );
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sigaction( SIGBUS, &action, &oldbus );
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scope( exit )
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{
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sigaction( SIGSEGV, &oldseg, null );
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sigaction( SIGBUS, &oldbus, null );
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}
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}
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if ( Runtime.sm_moduleUnitTester is null )
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{
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size_t failed = 0;
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foreach ( m; ModuleInfo )
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{
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if ( m )
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{
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auto fp = m.unitTest;
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if ( fp )
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{
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try
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{
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fp();
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}
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catch ( Throwable e )
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{
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_d_print_throwable(e);
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failed++;
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}
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}
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}
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}
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return failed == 0;
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}
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return Runtime.sm_moduleUnitTester();
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}
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///////////////////////////////////////////////////////////////////////////////
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// Default Implementations
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///////////////////////////////////////////////////////////////////////////////
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/**
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*
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*/
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Throwable.TraceInfo defaultTraceHandler( void* ptr = null )
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{
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// backtrace
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version (GNU)
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import gcc.backtrace;
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version (CRuntime_Glibc)
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import core.sys.linux.execinfo;
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else version (Darwin)
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import core.sys.darwin.execinfo;
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else version (FreeBSD)
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import core.sys.freebsd.execinfo;
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else version (NetBSD)
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import core.sys.netbsd.execinfo;
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else version (DragonFlyBSD)
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import core.sys.dragonflybsd.execinfo;
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else version (Windows)
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import core.sys.windows.stacktrace;
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else version (Solaris)
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import core.sys.solaris.execinfo;
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else version (CRuntime_UClibc)
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import core.sys.linux.execinfo;
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// avoid recursive GC calls in finalizer, trace handlers should be made @nogc instead
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import core.memory : gc_inFinalizer;
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if (gc_inFinalizer)
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return null;
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//printf("runtime.defaultTraceHandler()\n");
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static if ( __traits( compiles, new LibBacktrace(0) ) )
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{
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version (Posix)
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{
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static enum FIRSTFRAME = 4;
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}
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else version (Win64)
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{
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static enum FIRSTFRAME = 4;
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}
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else
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{
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static enum FIRSTFRAME = 0;
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}
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return new LibBacktrace(FIRSTFRAME);
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}
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else static if ( __traits( compiles, new UnwindBacktrace(0) ) )
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{
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version (Posix)
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{
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static enum FIRSTFRAME = 5;
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}
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else version (Win64)
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{
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static enum FIRSTFRAME = 4;
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}
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else
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{
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static enum FIRSTFRAME = 0;
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}
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return new UnwindBacktrace(FIRSTFRAME);
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}
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else static if ( __traits( compiles, backtrace ) )
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{
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import core.demangle;
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import core.stdc.stdlib : free;
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import core.stdc.string : strlen, memchr, memmove;
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class DefaultTraceInfo : Throwable.TraceInfo
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{
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this()
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{
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numframes = 0; //backtrace( callstack, MAXFRAMES );
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if (numframes < 2) // backtrace() failed, do it ourselves
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{
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static void** getBasePtr()
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{
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version (D_InlineAsm_X86)
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asm { naked; mov EAX, EBP; ret; }
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else
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version (D_InlineAsm_X86_64)
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asm { naked; mov RAX, RBP; ret; }
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else
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return null;
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}
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auto stackTop = getBasePtr();
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auto stackBottom = cast(void**) thread_stackBottom();
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void* dummy;
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if ( stackTop && &dummy < stackTop && stackTop < stackBottom )
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{
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auto stackPtr = stackTop;
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for ( numframes = 0; stackTop <= stackPtr &&
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stackPtr < stackBottom &&
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numframes < MAXFRAMES; )
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{
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enum CALL_INSTRUCTION_SIZE = 1; // it may not be 1 but it is good enough to get
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// in CALL instruction address range for backtrace
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callstack[numframes++] = *(stackPtr + 1) - CALL_INSTRUCTION_SIZE;
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stackPtr = cast(void**) *stackPtr;
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}
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}
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}
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}
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override int opApply( scope int delegate(ref const(char[])) dg ) const
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{
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return opApply( (ref size_t, ref const(char[]) buf)
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{
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return dg( buf );
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} );
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}
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override int opApply( scope int delegate(ref size_t, ref const(char[])) dg ) const
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{
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version (Posix)
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{
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// NOTE: The first 4 frames with the current implementation are
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// inside core.runtime and the object code, so eliminate
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// these for readability. The alternative would be to
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// exclude the first N frames that are in a list of
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// mangled function names.
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enum FIRSTFRAME = 4;
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}
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else version (Windows)
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{
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// NOTE: On Windows, the number of frames to exclude is based on
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// whether the exception is user or system-generated, so
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// it may be necessary to exclude a list of function names
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// instead.
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enum FIRSTFRAME = 0;
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}
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version (linux) enum enableDwarf = true;
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else version (FreeBSD) enum enableDwarf = true;
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else version (DragonFlyBSD) enum enableDwarf = true;
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else version (Darwin) enum enableDwarf = true;
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else enum enableDwarf = false;
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static if (enableDwarf)
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{
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import core.internal.traits : externDFunc;
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alias traceHandlerOpApplyImpl = externDFunc!(
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"rt.backtrace.dwarf.traceHandlerOpApplyImpl",
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int function(const void*[], scope int delegate(ref size_t, ref const(char[])))
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);
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if (numframes >= FIRSTFRAME)
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{
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return traceHandlerOpApplyImpl(
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callstack[FIRSTFRAME .. numframes],
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dg
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);
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}
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else
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{
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return 0;
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}
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}
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else
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{
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const framelist = backtrace_symbols( callstack.ptr, numframes );
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scope(exit) free(cast(void*) framelist);
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int ret = 0;
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for ( int i = FIRSTFRAME; i < numframes; ++i )
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{
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char[4096] fixbuf;
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auto buf = framelist[i][0 .. strlen(framelist[i])];
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auto pos = cast(size_t)(i - FIRSTFRAME);
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buf = fixline( buf, fixbuf );
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ret = dg( pos, buf );
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if ( ret )
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break;
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}
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return ret;
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}
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}
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override string toString() const
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{
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string buf;
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foreach ( i, line; this )
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buf ~= i ? "\n" ~ line : line;
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return buf;
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}
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private:
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int numframes;
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static enum MAXFRAMES = 128;
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void*[MAXFRAMES] callstack = void;
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private:
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const(char)[] fixline( const(char)[] buf, return ref char[4096] fixbuf ) const
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{
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size_t symBeg, symEnd;
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version (Darwin)
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{
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// format is:
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// 1 module 0x00000000 D6module4funcAFZv + 0
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for ( size_t i = 0, n = 0; i < buf.length; i++ )
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{
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if ( ' ' == buf[i] )
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{
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n++;
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while ( i < buf.length && ' ' == buf[i] )
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i++;
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if ( 3 > n )
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continue;
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symBeg = i;
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while ( i < buf.length && ' ' != buf[i] )
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i++;
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symEnd = i;
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break;
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}
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}
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}
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else version (CRuntime_Glibc)
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{
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// format is: module(_D6module4funcAFZv) [0x00000000]
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// or: module(_D6module4funcAFZv+0x78) [0x00000000]
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auto bptr = cast(char*) memchr( buf.ptr, '(', buf.length );
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auto eptr = cast(char*) memchr( buf.ptr, ')', buf.length );
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auto pptr = cast(char*) memchr( buf.ptr, '+', buf.length );
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if (pptr && pptr < eptr)
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eptr = pptr;
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if ( bptr++ && eptr )
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{
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symBeg = bptr - buf.ptr;
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symEnd = eptr - buf.ptr;
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}
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}
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else version (FreeBSD)
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{
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// format is: 0x00000000 <_D6module4funcAFZv+0x78> at module
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auto bptr = cast(char*) memchr( buf.ptr, '<', buf.length );
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auto eptr = cast(char*) memchr( buf.ptr, '+', buf.length );
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if ( bptr++ && eptr )
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{
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symBeg = bptr - buf.ptr;
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symEnd = eptr - buf.ptr;
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}
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}
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else version (NetBSD)
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{
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// format is: 0x00000000 <_D6module4funcAFZv+0x78> at module
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auto bptr = cast(char*) memchr( buf.ptr, '<', buf.length );
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auto eptr = cast(char*) memchr( buf.ptr, '+', buf.length );
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if ( bptr++ && eptr )
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{
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symBeg = bptr - buf.ptr;
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symEnd = eptr - buf.ptr;
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}
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}
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else version (DragonFlyBSD)
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{
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// format is: 0x00000000 <_D6module4funcAFZv+0x78> at module
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auto bptr = cast(char*) memchr( buf.ptr, '<', buf.length );
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auto eptr = cast(char*) memchr( buf.ptr, '+', buf.length );
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if ( bptr++ && eptr )
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{
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symBeg = bptr - buf.ptr;
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symEnd = eptr - buf.ptr;
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}
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}
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else version (Solaris)
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{
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// format is object'symbol+offset [pc]
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auto bptr = cast(char*) memchr( buf.ptr, '\'', buf.length );
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auto eptr = cast(char*) memchr( buf.ptr, '+', buf.length );
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if ( bptr++ && eptr )
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{
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symBeg = bptr - buf.ptr;
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symEnd = eptr - buf.ptr;
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}
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}
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else
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{
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// fallthrough
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}
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assert(symBeg < buf.length && symEnd < buf.length);
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assert(symBeg <= symEnd);
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enum min = (size_t a, size_t b) => a <= b ? a : b;
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if (symBeg == symEnd || symBeg >= fixbuf.length)
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{
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immutable len = min(buf.length, fixbuf.length);
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fixbuf[0 .. len] = buf[0 .. len];
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return fixbuf[0 .. len];
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}
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else
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{
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fixbuf[0 .. symBeg] = buf[0 .. symBeg];
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auto sym = demangle(buf[symBeg .. symEnd], fixbuf[symBeg .. $]);
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if (sym.ptr !is fixbuf.ptr + symBeg)
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{
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// demangle reallocated the buffer, copy the symbol to fixbuf
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immutable len = min(fixbuf.length - symBeg, sym.length);
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memmove(fixbuf.ptr + symBeg, sym.ptr, len);
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if (symBeg + len == fixbuf.length)
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return fixbuf[];
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}
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immutable pos = symBeg + sym.length;
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assert(pos < fixbuf.length);
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immutable tail = buf.length - symEnd;
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immutable len = min(fixbuf.length - pos, tail);
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fixbuf[pos .. pos + len] = buf[symEnd .. symEnd + len];
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return fixbuf[0 .. pos + len];
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}
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}
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}
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return new DefaultTraceInfo;
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}
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else static if ( __traits( compiles, new StackTrace(0, null) ) )
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{
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version (Win64)
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{
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static enum FIRSTFRAME = 4;
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}
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else version (Win32)
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{
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static enum FIRSTFRAME = 0;
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}
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import core.sys.windows.winnt : CONTEXT;
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auto s = new StackTrace(FIRSTFRAME, cast(CONTEXT*)ptr);
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return s;
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}
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else
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{
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return null;
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}
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}
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