gcc/libjava/posix.cc

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// posix.cc -- Helper functions for POSIX-flavored OSs.
/* Copyright (C) 2000, 2001, 2002, 2006 Free Software Foundation
This file is part of libgcj.
This software is copyrighted work licensed under the terms of the
Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
details. */
#include <config.h>
#include "posix.h"
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#ifdef HAVE_DLFCN_H
#include <dlfcn.h>
#endif
#include <jvm.h>
#include <java-stack.h>
#include <java/lang/Thread.h>
#include <java/io/InterruptedIOException.h>
#include <java/util/Properties.h>
#if defined (ECOS)
extern "C" unsigned long long _clock (void);
#endif
#if defined(HAVE_PROC_SELF_EXE)
static char exec_name[20];
// initialized in _Jv_platform_initialize()
#endif
const char *_Jv_ThisExecutable (void)
{
#if defined(DISABLE_MAIN_ARGS)
return "[Embedded App]";
#elif defined(HAVE_PROC_SELF_EXE)
return exec_name;
// initialized in _Jv_platform_initialize()
#else
return _Jv_GetSafeArg (0);
#endif
}
// gettimeofday implementation.
jlong
_Jv_platform_gettimeofday ()
{
#if defined (HAVE_GETTIMEOFDAY)
timeval tv;
gettimeofday (&tv, NULL);
return (tv.tv_sec * 1000LL) + (tv.tv_usec / 1000LL);
#elif defined (HAVE_TIME)
return time (NULL) * 1000LL;
#elif defined (HAVE_FTIME)
struct timeb t;
ftime (&t);
return (t.time * 1000LL) + t.millitm;
#elif defined (ECOS)
// FIXME.
return _clock();
#else
// In the absence of any function, time remains forever fixed.
return 23000;
#endif
}
jlong
_Jv_platform_nanotime ()
{
#ifdef HAVE_CLOCK_GETTIME
struct timespec now;
clockid_t id;
#ifdef CLOCK_MONOTONIC
id = CLOCK_MONOTONIC;
#elif defined (CLOCK_HIGHRES)
id = CLOCK_HIGHRES;
#else
id = CLOCK_REALTIME;
#endif
if (clock_gettime (id, &now) == 0)
{
jlong result = (jlong) now.tv_sec;
result = result * 1000000000LL + now.tv_nsec;
return result;
}
// clock_gettime failed, but we can fall through.
#endif // HAVE_CLOCK_GETTIME
#if defined (HAVE_GETTIMEOFDAY)
{
timeval tv;
gettimeofday (&tv, NULL);
return (tv.tv_sec * 1000000000LL) + tv.tv_usec * 1000LL;
}
#else
return _Jv_platform_gettimeofday () * 1000000LL;
#endif
}
// Platform-specific VM initialization.
void
_Jv_platform_initialize (void)
{
#if defined (HAVE_SIGACTION)
// We only want this on POSIX systems.
struct sigaction act;
act.sa_handler = SIG_IGN;
sigemptyset (&act.sa_mask);
act.sa_flags = 0;
sigaction (SIGPIPE, &act, NULL);
#else
signal (SIGPIPE, SIG_IGN);
#endif
#if defined (HAVE_PROC_SELF_EXE)
// Compute our executable name
sprintf (exec_name, "/proc/%d/exe", getpid ());
#endif
}
// Set platform-specific System properties.
void
_Jv_platform_initProperties (java::util::Properties* newprops)
{
// A convenience define.
#define SET(Prop,Val) \
newprops->put(JvNewStringLatin1 (Prop), JvNewStringLatin1 (Val))
SET ("file.separator", "/");
SET ("path.separator", ":");
SET ("line.separator", "\n");
const char *tmpdir = ::getenv("TMPDIR");
if (! tmpdir)
tmpdir = "/tmp";
SET ("java.io.tmpdir", tmpdir);
re PR libgcj/17002 (java.util.TimeZone.getDefault() is broken) libjava/ PR libgcj/17002 PR classpath/28550 * java/util/VMTimeZone.java (getDefaultTimeZoneId): To read /etc/localtime, use ZoneInfo.readTZFile instead of VMTimeZone.readtzFile. Get better timezone name for /etc/localtime, either if it is a symlink or through /etc/sysconfig/clock. (readSysconfigClockFile): New static method. (readtzFile): Removed. * java/lang/System.java: Add gnu.java.util.zoneinfo.dir to comments. * posix.cc (_Jv_platform_initProperties): Set gnu.java.util.zoneinfo.dir. * sources.am (gnu_java_util_source_files): Add classpath/gnu/java/util/ZoneInfo.java. * Makefile.in: Regenerated. * java/util/VMTimeZone.h: Regenerated. * java/util/TimeZone.h: Regenerated. * gnu/java/util/ZoneInfo.h: Generated. libjava/classpath/ * java/util/Date.java (parse): Properly parse 09:01:02 as hours/minutes/seconds, not as hours/minutes/year. * java/util/SimpleTimeZone.java (SimpleTimeZone): Simplify {start,end}TimeMode constructor by calling shorter constructor, set {start,end}TimeMode fields after it returns. (setStartRule): Don't adjust startTime into WALL_TIME. Set startTimeMode to WALL_TIME. (endStartRule): Similarly. (getOffset): Handle properly millis + dstOffset overflowing into the next day. Adjust startTime resp. endTime based on startTimeMode resp. endTimeMode. * java/util/TimeZone.java (zoneinfo_dir, availableIDs, aliases0): New static fields. (timezones): Remove synchronized keyword. Set zoneinfo_dir. If non-null, set up aliases0 and don't put anything into timezones0. (defaultZone): Call getTimeZone instead of timezones().get. (getDefaultTimeZone): Fix parsing of EST5 or EST5EDT6. Use getTimeZoneInternal instead of timezones().get. (parseTime): Parse correctly hour:minute. (getTimeZoneInternal): New private method. (getTimeZone): Do the custom ID checking first, canonicalize ID for custom IDs as required by documentation. Call getTimeZoneInternal to handle the rest. (getAvailableIDs(int)): Add locking. Handle zoneinfo_dir != null. (getAvailableIDs(File,String,ArrayList)): New private method. (getAvailableIDs()): Add locking. Handle zoneinfo_dir != null. * gnu/java/util/ZoneInfo.java: New file. From-SVN: r122229
2007-02-22 17:04:55 +01:00
const char *zoneinfodir = ::getenv("TZDATA");
if (! zoneinfodir)
zoneinfodir = "/usr/share/zoneinfo";
SET ("gnu.java.util.zoneinfo.dir", zoneinfodir);
}
static inline void
internal_gettimeofday (struct timeval *result)
{
#if defined (HAVE_GETTIMEOFDAY)
gettimeofday (result, NULL);
#else
jlong val = _Jv_platform_gettimeofday ();
result->tv_sec = val / 1000;
result->tv_usec = (val % 1000) * 1000;
#endif /* HAVE_GETTIMEOFDAY */
}
// A wrapper for select() which ignores EINTR.
int
_Jv_select (int n, fd_set *readfds, fd_set *writefds,
fd_set *exceptfds, struct timeval *timeout)
{
#ifdef HAVE_SELECT
// If we have a timeout, compute the absolute ending time.
struct timeval end, delay;
if (timeout)
{
internal_gettimeofday (&end);
end.tv_usec += timeout->tv_usec;
if (end.tv_usec >= 1000000)
{
++end.tv_sec;
end.tv_usec -= 1000000;
}
end.tv_sec += timeout->tv_sec;
delay = *timeout;
}
else
{
// Placate compiler.
delay.tv_sec = delay.tv_usec = 0;
}
while (1)
{
int r = select (n, readfds, writefds, exceptfds,
timeout ? &delay : NULL);
if (r != -1 || errno != EINTR)
return r;
// Here we know we got EINTR.
if (java::lang::Thread::interrupted ())
throw new java::io::InterruptedIOException (JvNewStringLatin1 ("select interrupted"));
struct timeval after;
if (timeout)
{
internal_gettimeofday (&after);
// Now compute new timeout argument.
delay.tv_usec = end.tv_usec - after.tv_usec;
delay.tv_sec = end.tv_sec - after.tv_sec;
if (delay.tv_usec < 0)
{
--delay.tv_sec;
delay.tv_usec += 1000000;
}
if (delay.tv_sec < 0)
{
// We assume that the user wants a valid select() call
// more than precise timing. So if we get a series of
// EINTR we just keep trying with delay 0 until we get a
// valid result.
delay.tv_sec = 0;
}
}
}
#else /* HAVE_SELECT */
return 0;
#endif
}
// Given an address, find the object that defines it and the nearest
// defined symbol to that address. Returns 0 if no object defines this
// address.
int
_Jv_platform_dladdr (void *addr, _Jv_AddrInfo *info)
{
int ret_val = 0;
#if defined (HAVE_DLFCN_H) && defined (HAVE_DLADDR)
Dl_info addr_info;
ret_val = dladdr (addr, &addr_info);
if (ret_val != 0)
{
info->file_name = addr_info.dli_fname;
info->base = addr_info.dli_fbase;
info->sym_name = addr_info.dli_sname;
info->sym_addr = addr_info.dli_saddr;
}
#else
info->file_name = NULL;
info->base = NULL;
info->sym_name = NULL;
info->sym_addr = NULL;
#endif
return ret_val;
}