Initial check-in of gcc 4.7.2.

Change-Id: I4a2f5a921c21741a0e18bda986d77e5f1bef0365

1 files changed, 520 insertions, 0 deletions

diff --git a/gcc-4.7/libgo/runtime/runtime.h b/gcc-4.7/libgo/runtime/runtime.h
new file mode 100644
index 000000000..dc4fc0817
--- /dev/null
+++ b/gcc-4.7/libgo/runtime/runtime.h
@@ -0,0 +1,520 @@
+/* runtime.h -- runtime support for Go.
+
+   Copyright 2009 The Go Authors. All rights reserved.
+   Use of this source code is governed by a BSD-style
+   license that can be found in the LICENSE file.  */
+
+#include "config.h"
+
+#include "go-assert.h"
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <ucontext.h>
+
+#ifdef HAVE_SYS_MMAN_H
+#include <sys/mman.h>
+#endif
+
+#include "array.h"
+#include "go-alloc.h"
+#include "go-panic.h"
+#include "go-string.h"
+
+/* This file supports C files copied from the 6g runtime library.
+   This is a version of the 6g runtime.h rewritten for gccgo's version
+   of the code.  */
+
+typedef signed int   int8    __attribute__ ((mode (QI)));
+typedef unsigned int uint8   __attribute__ ((mode (QI)));
+typedef signed int   int16   __attribute__ ((mode (HI)));
+typedef unsigned int uint16  __attribute__ ((mode (HI)));
+typedef signed int   int32   __attribute__ ((mode (SI)));
+typedef unsigned int uint32  __attribute__ ((mode (SI)));
+typedef signed int   int64   __attribute__ ((mode (DI)));
+typedef unsigned int uint64  __attribute__ ((mode (DI)));
+typedef float        float32 __attribute__ ((mode (SF)));
+typedef double       float64 __attribute__ ((mode (DF)));
+typedef unsigned int uintptr __attribute__ ((mode (pointer)));
+
+/* Defined types.  */
+
+typedef	uint8			bool;
+typedef	uint8			byte;
+typedef	struct	Func		Func;
+typedef	struct	G		G;
+typedef	union	Lock		Lock;
+typedef	struct	M		M;
+typedef	union	Note		Note;
+typedef	struct	SigTab		SigTab;
+typedef	struct	MCache		MCache;
+typedef struct	FixAlloc	FixAlloc;
+typedef	struct	Hchan		Hchan;
+typedef	struct	Timers		Timers;
+typedef	struct	Timer		Timer;
+
+typedef	struct	__go_open_array		Slice;
+typedef	struct	__go_string		String;
+typedef struct	__go_interface		Iface;
+typedef	struct	__go_empty_interface	Eface;
+typedef	struct	__go_type_descriptor	Type;
+typedef	struct	__go_defer_stack	Defer;
+typedef	struct	__go_panic_stack	Panic;
+
+typedef struct	__go_func_type		FuncType;
+typedef struct	__go_map_type		MapType;
+
+typedef struct  Traceback	Traceback;
+
+/*
+ * per-cpu declaration.
+ */
+extern M*	runtime_m(void);
+extern G*	runtime_g(void);
+
+extern M	runtime_m0;
+extern G	runtime_g0;
+
+/*
+ * defined constants
+ */
+enum
+{
+	// G status
+	//
+	// If you add to this list, add to the list
+	// of "okay during garbage collection" status
+	// in mgc0.c too.
+	Gidle,
+	Grunnable,
+	Grunning,
+	Gsyscall,
+	Gwaiting,
+	Gmoribund,
+	Gdead,
+};
+enum
+{
+	true	= 1,
+	false	= 0,
+};
+
+/*
+ * structures
+ */
+union	Lock
+{
+	uint32	key;	// futex-based impl
+	M*	waitm;	// linked list of waiting M's (sema-based impl)
+};
+union	Note
+{
+	uint32	key;	// futex-based impl
+	M*	waitm;	// waiting M (sema-based impl)
+};
+struct	G
+{
+	Defer*	defer;
+	Panic*	panic;
+	void*	exception;	// current exception being thrown
+	bool	is_foreign;	// whether current exception from other language
+	void	*gcstack;	// if status==Gsyscall, gcstack = stackbase to use during gc
+	uintptr	gcstack_size;
+	void*	gcnext_segment;
+	void*	gcnext_sp;
+	void*	gcinitial_sp;
+	ucontext_t gcregs;
+	byte*	entry;		// initial function
+	G*	alllink;	// on allg
+	void*	param;		// passed parameter on wakeup
+	bool	fromgogo;	// reached from gogo
+	int16	status;
+	int32	goid;
+	uint32	selgen;		// valid sudog pointer
+	const char*	waitreason;	// if status==Gwaiting
+	G*	schedlink;
+	bool	readyonstop;
+	bool	ispanic;
+	M*	m;		// for debuggers, but offset not hard-coded
+	M*	lockedm;
+	M*	idlem;
+	int32	sig;
+	int32	writenbuf;
+	byte*	writebuf;
+	uintptr	sigcode0;
+	uintptr	sigcode1;
+	// uintptr	sigpc;
+	uintptr	gopc;	// pc of go statement that created this goroutine
+
+	int32	ncgo;
+	struct cgoalloc *cgoalloc;
+
+	Traceback* traceback;
+
+	ucontext_t	context;
+	void*		stack_context[10];
+};
+
+struct	M
+{
+	G*	g0;		// goroutine with scheduling stack
+	G*	gsignal;	// signal-handling G
+	G*	curg;		// current running goroutine
+	int32	id;
+	int32	mallocing;
+	int32	gcing;
+	int32	locks;
+	int32	nomemprof;
+	int32	waitnextg;
+	int32	dying;
+	int32	profilehz;
+	int32	helpgc;
+	uint32	fastrand;
+	uint64	ncgocall;
+	Note	havenextg;
+	G*	nextg;
+	M*	alllink;	// on allm
+	M*	schedlink;
+	MCache	*mcache;
+	G*	lockedg;
+	G*	idleg;
+	uintptr	createstack[32];	// Stack that created this thread.
+	M*	nextwaitm;	// next M waiting for lock
+	uintptr	waitsema;	// semaphore for parking on locks
+	uint32	waitsemacount;
+	uint32	waitsemalock;
+};
+
+struct	SigTab
+{
+	int32	sig;
+	int32	flags;
+};
+enum
+{
+	SigNotify = 1<<0,	// let signal.Notify have signal, even if from kernel
+	SigKill = 1<<1,		// if signal.Notify doesn't take it, exit quietly
+	SigThrow = 1<<2,	// if signal.Notify doesn't take it, exit loudly
+	SigPanic = 1<<3,	// if the signal is from the kernel, panic
+	SigDefault = 1<<4,	// if the signal isn't explicitly requested, don't monitor it
+};
+
+#ifndef NSIG
+#define NSIG 32
+#endif
+
+// NOTE(rsc): keep in sync with extern.go:/type.Func.
+// Eventually, the loaded symbol table should be closer to this form.
+struct	Func
+{
+	String	name;
+	uintptr	entry;	// entry pc
+};
+
+/* Macros.  */
+
+#ifdef GOOS_windows
+enum {
+   Windows = 1
+};
+#else
+enum {
+   Windows = 0
+};
+#endif
+
+struct	Timers
+{
+	Lock;
+	G	*timerproc;
+	bool		sleeping;
+	bool		rescheduling;
+	Note	waitnote;
+	Timer	**t;
+	int32	len;
+	int32	cap;
+};
+
+// Package time knows the layout of this structure.
+// If this struct changes, adjust ../time/sleep.go:/runtimeTimer.
+struct	Timer
+{
+	int32	i;		// heap index
+
+	// Timer wakes up at when, and then at when+period, ... (period > 0 only)
+	// each time calling f(now, arg) in the timer goroutine, so f must be
+	// a well-behaved function and not block.
+	int64	when;
+	int64	period;
+	void	(*f)(int64, Eface);
+	Eface	arg;
+};
+
+/*
+ * defined macros
+ *    you need super-gopher-guru privilege
+ *    to add this list.
+ */
+#define	nelem(x)	(sizeof(x)/sizeof((x)[0]))
+#define	nil		((void*)0)
+#define USED(v)		((void) v)
+
+/*
+ * external data
+ */
+G*	runtime_allg;
+G*	runtime_lastg;
+M*	runtime_allm;
+extern	int32	runtime_gomaxprocs;
+extern	bool	runtime_singleproc;
+extern	uint32	runtime_panicking;
+extern	int32	runtime_gcwaiting;		// gc is waiting to run
+int32	runtime_ncpu;
+
+/*
+ * common functions and data
+ */
+int32	runtime_findnull(const byte*);
+void	runtime_dump(byte*, int32);
+
+/*
+ * very low level c-called
+ */
+void	runtime_args(int32, byte**);
+void	runtime_osinit();
+void	runtime_goargs(void);
+void	runtime_goenvs(void);
+void	runtime_goenvs_unix(void);
+void	runtime_throw(const char*) __attribute__ ((noreturn));
+void	runtime_panicstring(const char*) __attribute__ ((noreturn));
+void	runtime_prints(const char*);
+void	runtime_printf(const char*, ...);
+void*	runtime_mal(uintptr);
+void	runtime_schedinit(void);
+void	runtime_initsig(void);
+void	runtime_sigenable(uint32 sig);
+int32	runtime_gotraceback(void);
+void	runtime_goroutineheader(G*);
+void	runtime_goroutinetrailer(G*);
+void	runtime_traceback();
+void	runtime_tracebackothers(G*);
+void	runtime_printtrace(uintptr*, int32);
+String	runtime_gostringnocopy(const byte*);
+void*	runtime_mstart(void*);
+G*	runtime_malg(int32, byte**, size_t*);
+void	runtime_minit(void);
+void	runtime_mallocinit(void);
+void	runtime_gosched(void);
+void	runtime_tsleep(int64);
+M*	runtime_newm(void);
+void	runtime_goexit(void);
+void	runtime_entersyscall(void) __asm__("syscall.Entersyscall");
+void	runtime_exitsyscall(void) __asm__("syscall.Exitsyscall");
+void	siginit(void);
+bool	__go_sigsend(int32 sig);
+int32	runtime_callers(int32, uintptr*, int32);
+int64	runtime_nanotime(void);
+int64	runtime_cputicks(void);
+
+void	runtime_stoptheworld(void);
+void	runtime_starttheworld(bool);
+extern uint32 runtime_worldsema;
+G*	__go_go(void (*pfn)(void*), void*);
+
+/*
+ * mutual exclusion locks.  in the uncontended case,
+ * as fast as spin locks (just a few user-level instructions),
+ * but on the contention path they sleep in the kernel.
+ * a zeroed Lock is unlocked (no need to initialize each lock).
+ */
+void	runtime_lock(Lock*);
+void	runtime_unlock(Lock*);
+
+/*
+ * sleep and wakeup on one-time events.
+ * before any calls to notesleep or notewakeup,
+ * must call noteclear to initialize the Note.
+ * then, exactly one thread can call notesleep
+ * and exactly one thread can call notewakeup (once).
+ * once notewakeup has been called, the notesleep
+ * will return.  future notesleep will return immediately.
+ * subsequent noteclear must be called only after
+ * previous notesleep has returned, e.g. it's disallowed
+ * to call noteclear straight after notewakeup.
+ *
+ * notetsleep is like notesleep but wakes up after
+ * a given number of nanoseconds even if the event
+ * has not yet happened.  if a goroutine uses notetsleep to
+ * wake up early, it must wait to call noteclear until it
+ * can be sure that no other goroutine is calling
+ * notewakeup.
+ */
+void	runtime_noteclear(Note*);
+void	runtime_notesleep(Note*);
+void	runtime_notewakeup(Note*);
+void	runtime_notetsleep(Note*, int64);
+
+/*
+ * low-level synchronization for implementing the above
+ */
+uintptr	runtime_semacreate(void);
+int32	runtime_semasleep(int64);
+void	runtime_semawakeup(M*);
+// or
+void	runtime_futexsleep(uint32*, uint32, int64);
+void	runtime_futexwakeup(uint32*, uint32);
+
+/*
+ * low level C-called
+ */
+#define runtime_mmap mmap
+#define runtime_munmap munmap
+#define runtime_madvise madvise
+#define runtime_memclr(buf, size) __builtin_memset((buf), 0, (size))
+#define runtime_getcallerpc(p) __builtin_return_address(0)
+
+#ifdef __rtems__
+void __wrap_rtems_task_variable_add(void **);
+#endif
+
+/*
+ * Names generated by gccgo.
+ */
+#define runtime_printbool	__go_print_bool
+#define runtime_printfloat	__go_print_double
+#define runtime_printint	__go_print_int64
+#define runtime_printiface	__go_print_interface
+#define runtime_printeface	__go_print_empty_interface
+#define runtime_printstring	__go_print_string
+#define runtime_printpointer	__go_print_pointer
+#define runtime_printuint	__go_print_uint64
+#define runtime_printslice	__go_print_slice
+#define runtime_printcomplex	__go_print_complex
+
+/*
+ * runtime go-called
+ */
+void	runtime_printbool(_Bool);
+void	runtime_printfloat(double);
+void	runtime_printint(int64);
+void	runtime_printiface(Iface);
+void	runtime_printeface(Eface);
+void	runtime_printstring(String);
+void	runtime_printpc(void*);
+void	runtime_printpointer(void*);
+void	runtime_printuint(uint64);
+void	runtime_printhex(uint64);
+void	runtime_printslice(Slice);
+void	runtime_printcomplex(__complex double);
+
+struct __go_func_type;
+void reflect_call(const struct __go_func_type *, const void *, _Bool, _Bool,
+		  void **, void **)
+  asm ("reflect.call");
+
+/* Functions.  */
+#define runtime_panic __go_panic
+#define runtime_write(d, v, n) write((d), (v), (n))
+#define runtime_malloc(s) __go_alloc(s)
+#define runtime_free(p) __go_free(p)
+#define runtime_strcmp(s1, s2) __builtin_strcmp((s1), (s2))
+#define runtime_mcmp(a, b, s) __builtin_memcmp((a), (b), (s))
+#define runtime_memmove(a, b, s) __builtin_memmove((a), (b), (s))
+#define runtime_exit(s) exit(s)
+MCache*	runtime_allocmcache(void);
+void	free(void *v);
+#define runtime_cas(pval, old, new) __sync_bool_compare_and_swap (pval, old, new)
+#define runtime_casp(pval, old, new) __sync_bool_compare_and_swap (pval, old, new)
+#define runtime_xadd(p, v) __sync_add_and_fetch (p, v)
+#define runtime_xchg(p, v) __atomic_exchange_n (p, v, __ATOMIC_SEQ_CST)
+#define runtime_atomicload(p) __atomic_load_n (p, __ATOMIC_SEQ_CST)
+#define runtime_atomicstore(p, v) __atomic_store_n (p, v, __ATOMIC_SEQ_CST)
+#define runtime_atomicloadp(p) __atomic_load_n (p, __ATOMIC_SEQ_CST)
+#define runtime_atomicstorep(p, v) __atomic_store_n (p, v, __ATOMIC_SEQ_CST)
+
+struct __go_func_type;
+bool	runtime_addfinalizer(void*, void(*fn)(void*), const struct __go_func_type *);
+#define runtime_getcallersp(p) __builtin_frame_address(1)
+int32	runtime_mcount(void);
+int32	runtime_gcount(void);
+void	runtime_dopanic(int32) __attribute__ ((noreturn));
+void	runtime_startpanic(void);
+void	runtime_ready(G*);
+const byte*	runtime_getenv(const char*);
+int32	runtime_atoi(const byte*);
+uint32	runtime_fastrand1(void);
+
+void	runtime_sigprof();
+void	runtime_resetcpuprofiler(int32);
+void	runtime_setcpuprofilerate(void(*)(uintptr*, int32), int32);
+void	runtime_usleep(uint32);
+
+/*
+ * runtime c-called (but written in Go)
+ */
+void	runtime_printany(Eface)
+     __asm__("runtime.Printany");
+void	runtime_newTypeAssertionError(const String*, const String*, const String*, const String*, Eface*)
+     __asm__("runtime.NewTypeAssertionError");
+void	runtime_newErrorString(String, Eface*)
+     __asm__("runtime.NewErrorString");
+
+/*
+ * wrapped for go users
+ */
+bool	runtime_isInf(float64 f, int32 sign);
+#define runtime_isNaN(f) __builtin_isnan(f)
+void	runtime_semacquire(uint32 volatile *);
+void	runtime_semrelease(uint32 volatile *);
+int32	runtime_gomaxprocsfunc(int32 n);
+void	runtime_procyield(uint32);
+void	runtime_osyield(void);
+void	runtime_LockOSThread(void) __asm__("runtime.LockOSThread");
+void	runtime_UnlockOSThread(void) __asm__("runtime.UnlockOSThread");
+
+bool	runtime_showframe(const unsigned char*);
+
+uintptr	runtime_memlimit(void);
+
+// If appropriate, ask the operating system to control whether this
+// thread should receive profiling signals.  This is only necessary on OS X.
+// An operating system should not deliver a profiling signal to a
+// thread that is not actually executing (what good is that?), but that's
+// what OS X prefers to do.  When profiling is turned on, we mask
+// away the profiling signal when threads go to sleep, so that OS X
+// is forced to deliver the signal to a thread that's actually running.
+// This is a no-op on other systems.
+void	runtime_setprof(bool);
+
+void	runtime_time_scan(void (*)(byte*, int64));
+void	runtime_trampoline_scan(void (*)(byte *, int64));
+
+void	runtime_setsig(int32, bool, bool);
+#define runtime_setitimer setitimer
+
+void	runtime_check(void);
+
+// A list of global variables that the garbage collector must scan.
+struct root_list {
+	struct root_list *next;
+	struct root {
+		void *decl;
+		size_t size;
+	} roots[];
+};
+
+void	__go_register_gc_roots(struct root_list*);
+
+// Size of stack space allocated using Go's allocator.
+// This will be 0 when using split stacks, as in that case
+// the stacks are allocated by the splitstack library.
+extern uintptr runtime_stacks_sys;
+
+extern _Bool __go_file_line (uintptr, String*, String*, int *);