runtime: make more build-friendly

Collapse the arch,os-specific directories into the main directory
by renaming xxx/foo.c to foo_xxx.c, and so on.

There are no substantial edits here, except to the Makefile.
The assumption is that the Go tool will #define GOOS_darwin
and GOARCH_amd64 and will make any file named something
like signals_darwin.h available as signals_GOOS.h during the
build.  This replaces what used to be done with -I$(GOOS).

There is still work to be done to make runtime build with
standard tools, but this is a big step.  After this we will have
to write a script to generate all the generated files so they
can be checked in (instead of generated during the build).

R=r, iant, r, lucio.dere
CC=golang-dev
https://golang.org/cl/5490053

1 files changed, 0 insertions, 206 deletions

diff --git a/src/pkg/runtime/linux/thread.c b/src/pkg/runtime/linux/thread.c
deleted file mode 100644
index 5502bbbcab..0000000000
--- a/src/pkg/runtime/linux/thread.c
+++ /dev/null
@@ -1,206 +0,0 @@
-// 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 "runtime.h"
-#include "defs.h"
-#include "os.h"
-#include "stack.h"
-
-extern SigTab runtime·sigtab[];
-
-int32 runtime·open(uint8*, int32, int32);
-int32 runtime·close(int32);
-int32 runtime·read(int32, void*, int32);
-
-// Linux futex.
-//
-//	futexsleep(uint32 *addr, uint32 val)
-//	futexwakeup(uint32 *addr)
-//
-// Futexsleep atomically checks if *addr == val and if so, sleeps on addr.
-// Futexwakeup wakes up threads sleeping on addr.
-// Futexsleep is allowed to wake up spuriously.
-
-enum
-{
-	FUTEX_WAIT = 0,
-	FUTEX_WAKE = 1,
-
-	EINTR = 4,
-	EAGAIN = 11,
-};
-
-// Atomically,
-//	if(*addr == val) sleep
-// Might be woken up spuriously; that's allowed.
-// Don't sleep longer than ns; ns < 0 means forever.
-void
-runtime·futexsleep(uint32 *addr, uint32 val, int64 ns)
-{
-	Timespec ts, *tsp;
-
-	if(ns < 0)
-		tsp = nil;
-	else {
-		ts.tv_sec = ns/1000000000LL;
-		ts.tv_nsec = ns%1000000000LL;
-		// Avoid overflow
-		if(ts.tv_sec > 1<<30)
-			ts.tv_sec = 1<<30;
-		tsp = &ts;
-	}
-
-	// Some Linux kernels have a bug where futex of
-	// FUTEX_WAIT returns an internal error code
-	// as an errno.  Libpthread ignores the return value
-	// here, and so can we: as it says a few lines up,
-	// spurious wakeups are allowed.
-	runtime·futex(addr, FUTEX_WAIT, val, tsp, nil, 0);
-}
-
-// If any procs are sleeping on addr, wake up at most cnt.
-void
-runtime·futexwakeup(uint32 *addr, uint32 cnt)
-{
-	int64 ret;
-
-	ret = runtime·futex(addr, FUTEX_WAKE, cnt, nil, nil, 0);
-
-	if(ret >= 0)
-		return;
-
-	// I don't know that futex wakeup can return
-	// EAGAIN or EINTR, but if it does, it would be
-	// safe to loop and call futex again.
-	runtime·printf("futexwakeup addr=%p returned %D\n", addr, ret);
-	*(int32*)0x1006 = 0x1006;
-}
-
-static int32
-getproccount(void)
-{
-	int32 fd, rd, cnt, cpustrlen;
-	byte *cpustr, *pos, *bufpos;
-	byte buf[256];
-
-	fd = runtime·open((byte*)"/proc/stat", O_RDONLY|O_CLOEXEC, 0);
-	if(fd == -1)
-		return 1;
-	cnt = 0;
-	bufpos = buf;
-	cpustr = (byte*)"\ncpu";
-	cpustrlen = runtime·findnull(cpustr);
-	for(;;) {
-		rd = runtime·read(fd, bufpos, sizeof(buf)-cpustrlen);
-		if(rd == -1)
-			break;
-		bufpos[rd] = 0;
-		for(pos=buf; pos=runtime·strstr(pos, cpustr); cnt++, pos++) {
-		}
-		if(rd < cpustrlen)
-			break;
-		runtime·memmove(buf, bufpos+rd-cpustrlen+1, cpustrlen-1);
-		bufpos = buf+cpustrlen-1;
-	}
-	runtime·close(fd);
-	return cnt ? cnt : 1;
-}
-
-// Clone, the Linux rfork.
-enum
-{
-	CLONE_VM = 0x100,
-	CLONE_FS = 0x200,
-	CLONE_FILES = 0x400,
-	CLONE_SIGHAND = 0x800,
-	CLONE_PTRACE = 0x2000,
-	CLONE_VFORK = 0x4000,
-	CLONE_PARENT = 0x8000,
-	CLONE_THREAD = 0x10000,
-	CLONE_NEWNS = 0x20000,
-	CLONE_SYSVSEM = 0x40000,
-	CLONE_SETTLS = 0x80000,
-	CLONE_PARENT_SETTID = 0x100000,
-	CLONE_CHILD_CLEARTID = 0x200000,
-	CLONE_UNTRACED = 0x800000,
-	CLONE_CHILD_SETTID = 0x1000000,
-	CLONE_STOPPED = 0x2000000,
-	CLONE_NEWUTS = 0x4000000,
-	CLONE_NEWIPC = 0x8000000,
-};
-
-void
-runtime·newosproc(M *m, G *g, void *stk, void (*fn)(void))
-{
-	int32 ret;
-	int32 flags;
-
-	/*
-	 * note: strace gets confused if we use CLONE_PTRACE here.
-	 */
-	flags = CLONE_VM	/* share memory */
-		| CLONE_FS	/* share cwd, etc */
-		| CLONE_FILES	/* share fd table */
-		| CLONE_SIGHAND	/* share sig handler table */
-		| CLONE_THREAD	/* revisit - okay for now */
-		;
-
-	m->tls[0] = m->id;	// so 386 asm can find it
-	if(0){
-		runtime·printf("newosproc stk=%p m=%p g=%p fn=%p clone=%p id=%d/%d ostk=%p\n",
-			stk, m, g, fn, runtime·clone, m->id, m->tls[0], &m);
-	}
-
-	if((ret = runtime·clone(flags, stk, m, g, fn)) < 0) {
-		runtime·printf("runtime: failed to create new OS thread (have %d already; errno=%d)\n", runtime·mcount(), -ret);
-		runtime·throw("runtime.newosproc");
-	}
-}
-
-void
-runtime·osinit(void)
-{
-	runtime·ncpu = getproccount();
-}
-
-void
-runtime·goenvs(void)
-{
-	runtime·goenvs_unix();
-}
-
-// Called to initialize a new m (including the bootstrap m).
-void
-runtime·minit(void)
-{
-	// Initialize signal handling.
-	m->gsignal = runtime·malg(32*1024);	// OS X wants >=8K, Linux >=2K
-	runtime·signalstack(m->gsignal->stackguard - StackGuard, 32*1024);
-}
-
-void
-runtime·sigpanic(void)
-{
-	switch(g->sig) {
-	case SIGBUS:
-		if(g->sigcode0 == BUS_ADRERR && g->sigcode1 < 0x1000)
-			runtime·panicstring("invalid memory address or nil pointer dereference");
-		runtime·printf("unexpected fault address %p\n", g->sigcode1);
-		runtime·throw("fault");
-	case SIGSEGV:
-		if((g->sigcode0 == 0 || g->sigcode0 == SEGV_MAPERR || g->sigcode0 == SEGV_ACCERR) && g->sigcode1 < 0x1000)
-			runtime·panicstring("invalid memory address or nil pointer dereference");
-		runtime·printf("unexpected fault address %p\n", g->sigcode1);
-		runtime·throw("fault");
-	case SIGFPE:
-		switch(g->sigcode0) {
-		case FPE_INTDIV:
-			runtime·panicstring("integer divide by zero");
-		case FPE_INTOVF:
-			runtime·panicstring("integer overflow");
-		}
-		runtime·panicstring("floating point error");
-	}
-	runtime·panicstring(runtime·sigtab[g->sig].name);
-}