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-rw-r--r--src/os/posix/vm/os_posix.cpp531
1 files changed, 508 insertions, 23 deletions
diff --git a/src/os/posix/vm/os_posix.cpp b/src/os/posix/vm/os_posix.cpp
index 633331728..57bdf08d9 100644
--- a/src/os/posix/vm/os_posix.cpp
+++ b/src/os/posix/vm/os_posix.cpp
@@ -1,38 +1,46 @@
/*
* Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
-* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-*
-* This code is free software; you can redistribute it and/or modify it
-* under the terms of the GNU General Public License version 2 only, as
-* published by the Free Software Foundation.
-*
-* This code is distributed in the hope that it will be useful, but WITHOUT
-* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-* version 2 for more details (a copy is included in the LICENSE file that
-* accompanied this code).
-*
-* You should have received a copy of the GNU General Public License version
-* 2 along with this work; if not, write to the Free Software Foundation,
-* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-*
-* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
-* or visit www.oracle.com if you need additional information or have any
-* questions.
-*
-*/
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+#include "utilities/globalDefinitions.hpp"
#include "prims/jvm.h"
#include "runtime/frame.inline.hpp"
#include "runtime/os.hpp"
#include "utilities/vmError.hpp"
+#include <signal.h>
#include <unistd.h>
#include <sys/resource.h>
#include <sys/utsname.h>
#include <pthread.h>
#include <signal.h>
+// Todo: provide a os::get_max_process_id() or similar. Number of processes
+// may have been configured, can be read more accurately from proc fs etc.
+#ifndef MAX_PID
+#define MAX_PID INT_MAX
+#endif
+#define IS_VALID_PID(p) (p > 0 && p < MAX_PID)
// Check core dump limit and report possible place where core can be found
void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
@@ -158,8 +166,8 @@ void os::Posix::print_rlimit_info(outputStream* st) {
if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
else st->print("%uk", rlim.rlim_cur >> 10);
- //Isn't there on solaris
-#ifndef TARGET_OS_FAMILY_solaris
+ // Isn't there on solaris
+#if !defined(TARGET_OS_FAMILY_solaris) && !defined(TARGET_OS_FAMILY_aix)
st->print(", NPROC ");
getrlimit(RLIMIT_NPROC, &rlim);
if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
@@ -307,6 +315,483 @@ char* os::build_agent_function_name(const char *sym_name, const char *lib_name,
return agent_entry_name;
}
+// Returned string is a constant. For unknown signals "UNKNOWN" is returned.
+const char* os::Posix::get_signal_name(int sig, char* out, size_t outlen) {
+
+ static const struct {
+ int sig; const char* name;
+ }
+ info[] =
+ {
+ { SIGABRT, "SIGABRT" },
+#ifdef SIGAIO
+ { SIGAIO, "SIGAIO" },
+#endif
+ { SIGALRM, "SIGALRM" },
+#ifdef SIGALRM1
+ { SIGALRM1, "SIGALRM1" },
+#endif
+ { SIGBUS, "SIGBUS" },
+#ifdef SIGCANCEL
+ { SIGCANCEL, "SIGCANCEL" },
+#endif
+ { SIGCHLD, "SIGCHLD" },
+#ifdef SIGCLD
+ { SIGCLD, "SIGCLD" },
+#endif
+ { SIGCONT, "SIGCONT" },
+#ifdef SIGCPUFAIL
+ { SIGCPUFAIL, "SIGCPUFAIL" },
+#endif
+#ifdef SIGDANGER
+ { SIGDANGER, "SIGDANGER" },
+#endif
+#ifdef SIGDIL
+ { SIGDIL, "SIGDIL" },
+#endif
+#ifdef SIGEMT
+ { SIGEMT, "SIGEMT" },
+#endif
+ { SIGFPE, "SIGFPE" },
+#ifdef SIGFREEZE
+ { SIGFREEZE, "SIGFREEZE" },
+#endif
+#ifdef SIGGFAULT
+ { SIGGFAULT, "SIGGFAULT" },
+#endif
+#ifdef SIGGRANT
+ { SIGGRANT, "SIGGRANT" },
+#endif
+ { SIGHUP, "SIGHUP" },
+ { SIGILL, "SIGILL" },
+ { SIGINT, "SIGINT" },
+#ifdef SIGIO
+ { SIGIO, "SIGIO" },
+#endif
+#ifdef SIGIOINT
+ { SIGIOINT, "SIGIOINT" },
+#endif
+#ifdef SIGIOT
+ // SIGIOT is there for BSD compatibility, but on most Unices just a
+ // synonym for SIGABRT. The result should be "SIGABRT", not
+ // "SIGIOT".
+ #if (SIGIOT != SIGABRT )
+ { SIGIOT, "SIGIOT" },
+ #endif
+#endif
+#ifdef SIGKAP
+ { SIGKAP, "SIGKAP" },
+#endif
+ { SIGKILL, "SIGKILL" },
+#ifdef SIGLOST
+ { SIGLOST, "SIGLOST" },
+#endif
+#ifdef SIGLWP
+ { SIGLWP, "SIGLWP" },
+#endif
+#ifdef SIGLWPTIMER
+ { SIGLWPTIMER, "SIGLWPTIMER" },
+#endif
+#ifdef SIGMIGRATE
+ { SIGMIGRATE, "SIGMIGRATE" },
+#endif
+#ifdef SIGMSG
+ { SIGMSG, "SIGMSG" },
+#endif
+ { SIGPIPE, "SIGPIPE" },
+#ifdef SIGPOLL
+ { SIGPOLL, "SIGPOLL" },
+#endif
+#ifdef SIGPRE
+ { SIGPRE, "SIGPRE" },
+#endif
+ { SIGPROF, "SIGPROF" },
+#ifdef SIGPTY
+ { SIGPTY, "SIGPTY" },
+#endif
+#ifdef SIGPWR
+ { SIGPWR, "SIGPWR" },
+#endif
+ { SIGQUIT, "SIGQUIT" },
+#ifdef SIGRECONFIG
+ { SIGRECONFIG, "SIGRECONFIG" },
+#endif
+#ifdef SIGRECOVERY
+ { SIGRECOVERY, "SIGRECOVERY" },
+#endif
+#ifdef SIGRESERVE
+ { SIGRESERVE, "SIGRESERVE" },
+#endif
+#ifdef SIGRETRACT
+ { SIGRETRACT, "SIGRETRACT" },
+#endif
+#ifdef SIGSAK
+ { SIGSAK, "SIGSAK" },
+#endif
+ { SIGSEGV, "SIGSEGV" },
+#ifdef SIGSOUND
+ { SIGSOUND, "SIGSOUND" },
+#endif
+ { SIGSTOP, "SIGSTOP" },
+ { SIGSYS, "SIGSYS" },
+#ifdef SIGSYSERROR
+ { SIGSYSERROR, "SIGSYSERROR" },
+#endif
+#ifdef SIGTALRM
+ { SIGTALRM, "SIGTALRM" },
+#endif
+ { SIGTERM, "SIGTERM" },
+#ifdef SIGTHAW
+ { SIGTHAW, "SIGTHAW" },
+#endif
+ { SIGTRAP, "SIGTRAP" },
+#ifdef SIGTSTP
+ { SIGTSTP, "SIGTSTP" },
+#endif
+ { SIGTTIN, "SIGTTIN" },
+ { SIGTTOU, "SIGTTOU" },
+#ifdef SIGURG
+ { SIGURG, "SIGURG" },
+#endif
+ { SIGUSR1, "SIGUSR1" },
+ { SIGUSR2, "SIGUSR2" },
+#ifdef SIGVIRT
+ { SIGVIRT, "SIGVIRT" },
+#endif
+ { SIGVTALRM, "SIGVTALRM" },
+#ifdef SIGWAITING
+ { SIGWAITING, "SIGWAITING" },
+#endif
+#ifdef SIGWINCH
+ { SIGWINCH, "SIGWINCH" },
+#endif
+#ifdef SIGWINDOW
+ { SIGWINDOW, "SIGWINDOW" },
+#endif
+ { SIGXCPU, "SIGXCPU" },
+ { SIGXFSZ, "SIGXFSZ" },
+#ifdef SIGXRES
+ { SIGXRES, "SIGXRES" },
+#endif
+ { -1, NULL }
+ };
+
+ const char* ret = NULL;
+
+#ifdef SIGRTMIN
+ if (sig >= SIGRTMIN && sig <= SIGRTMAX) {
+ if (sig == SIGRTMIN) {
+ ret = "SIGRTMIN";
+ } else if (sig == SIGRTMAX) {
+ ret = "SIGRTMAX";
+ } else {
+ jio_snprintf(out, outlen, "SIGRTMIN+%d", sig - SIGRTMIN);
+ return out;
+ }
+ }
+#endif
+
+ if (sig > 0) {
+ for (int idx = 0; info[idx].sig != -1; idx ++) {
+ if (info[idx].sig == sig) {
+ ret = info[idx].name;
+ break;
+ }
+ }
+ }
+
+ if (!ret) {
+ if (!is_valid_signal(sig)) {
+ ret = "INVALID";
+ } else {
+ ret = "UNKNOWN";
+ }
+ }
+
+ jio_snprintf(out, outlen, ret);
+ return out;
+}
+
+// Returns true if signal number is valid.
+bool os::Posix::is_valid_signal(int sig) {
+ // MacOS not really POSIX compliant: sigaddset does not return
+ // an error for invalid signal numbers. However, MacOS does not
+ // support real time signals and simply seems to have just 33
+ // signals with no holes in the signal range.
+#ifdef __APPLE__
+ return sig >= 1 && sig < NSIG;
+#else
+ // Use sigaddset to check for signal validity.
+ sigset_t set;
+ if (sigaddset(&set, sig) == -1 && errno == EINVAL) {
+ return false;
+ }
+ return true;
+#endif
+}
+
+#define NUM_IMPORTANT_SIGS 32
+// Returns one-line short description of a signal set in a user provided buffer.
+const char* os::Posix::describe_signal_set_short(const sigset_t* set, char* buffer, size_t buf_size) {
+ assert(buf_size == (NUM_IMPORTANT_SIGS + 1), "wrong buffer size");
+ // Note: for shortness, just print out the first 32. That should
+ // cover most of the useful ones, apart from realtime signals.
+ for (int sig = 1; sig <= NUM_IMPORTANT_SIGS; sig++) {
+ const int rc = sigismember(set, sig);
+ if (rc == -1 && errno == EINVAL) {
+ buffer[sig-1] = '?';
+ } else {
+ buffer[sig-1] = rc == 0 ? '0' : '1';
+ }
+ }
+ buffer[NUM_IMPORTANT_SIGS] = 0;
+ return buffer;
+}
+
+// Prints one-line description of a signal set.
+void os::Posix::print_signal_set_short(outputStream* st, const sigset_t* set) {
+ char buf[NUM_IMPORTANT_SIGS + 1];
+ os::Posix::describe_signal_set_short(set, buf, sizeof(buf));
+ st->print(buf);
+}
+
+// Writes one-line description of a combination of sigaction.sa_flags into a user
+// provided buffer. Returns that buffer.
+const char* os::Posix::describe_sa_flags(int flags, char* buffer, size_t size) {
+ char* p = buffer;
+ size_t remaining = size;
+ bool first = true;
+ int idx = 0;
+
+ assert(buffer, "invalid argument");
+
+ if (size == 0) {
+ return buffer;
+ }
+
+ strncpy(buffer, "none", size);
+
+ const struct {
+ int i;
+ const char* s;
+ } flaginfo [] = {
+ { SA_NOCLDSTOP, "SA_NOCLDSTOP" },
+ { SA_ONSTACK, "SA_ONSTACK" },
+ { SA_RESETHAND, "SA_RESETHAND" },
+ { SA_RESTART, "SA_RESTART" },
+ { SA_SIGINFO, "SA_SIGINFO" },
+ { SA_NOCLDWAIT, "SA_NOCLDWAIT" },
+ { SA_NODEFER, "SA_NODEFER" },
+#ifdef AIX
+ { SA_ONSTACK, "SA_ONSTACK" },
+ { SA_OLDSTYLE, "SA_OLDSTYLE" },
+#endif
+ { 0, NULL }
+ };
+
+ for (idx = 0; flaginfo[idx].s && remaining > 1; idx++) {
+ if (flags & flaginfo[idx].i) {
+ if (first) {
+ jio_snprintf(p, remaining, "%s", flaginfo[idx].s);
+ first = false;
+ } else {
+ jio_snprintf(p, remaining, "|%s", flaginfo[idx].s);
+ }
+ const size_t len = strlen(p);
+ p += len;
+ remaining -= len;
+ }
+ }
+
+ buffer[size - 1] = '\0';
+
+ return buffer;
+}
+
+// Prints one-line description of a combination of sigaction.sa_flags.
+void os::Posix::print_sa_flags(outputStream* st, int flags) {
+ char buffer[0x100];
+ os::Posix::describe_sa_flags(flags, buffer, sizeof(buffer));
+ st->print(buffer);
+}
+
+// Helper function for os::Posix::print_siginfo_...():
+// return a textual description for signal code.
+struct enum_sigcode_desc_t {
+ const char* s_name;
+ const char* s_desc;
+};
+
+static bool get_signal_code_description(const siginfo_t* si, enum_sigcode_desc_t* out) {
+
+ const struct {
+ int sig; int code; const char* s_code; const char* s_desc;
+ } t1 [] = {
+ { SIGILL, ILL_ILLOPC, "ILL_ILLOPC", "Illegal opcode." },
+ { SIGILL, ILL_ILLOPN, "ILL_ILLOPN", "Illegal operand." },
+ { SIGILL, ILL_ILLADR, "ILL_ILLADR", "Illegal addressing mode." },
+ { SIGILL, ILL_ILLTRP, "ILL_ILLTRP", "Illegal trap." },
+ { SIGILL, ILL_PRVOPC, "ILL_PRVOPC", "Privileged opcode." },
+ { SIGILL, ILL_PRVREG, "ILL_PRVREG", "Privileged register." },
+ { SIGILL, ILL_COPROC, "ILL_COPROC", "Coprocessor error." },
+ { SIGILL, ILL_BADSTK, "ILL_BADSTK", "Internal stack error." },
+#if defined(IA64) && defined(LINUX)
+ { SIGILL, ILL_BADIADDR, "ILL_BADIADDR", "Unimplemented instruction address" },
+ { SIGILL, ILL_BREAK, "ILL_BREAK", "Application Break instruction" },
+#endif
+ { SIGFPE, FPE_INTDIV, "FPE_INTDIV", "Integer divide by zero." },
+ { SIGFPE, FPE_INTOVF, "FPE_INTOVF", "Integer overflow." },
+ { SIGFPE, FPE_FLTDIV, "FPE_FLTDIV", "Floating-point divide by zero." },
+ { SIGFPE, FPE_FLTOVF, "FPE_FLTOVF", "Floating-point overflow." },
+ { SIGFPE, FPE_FLTUND, "FPE_FLTUND", "Floating-point underflow." },
+ { SIGFPE, FPE_FLTRES, "FPE_FLTRES", "Floating-point inexact result." },
+ { SIGFPE, FPE_FLTINV, "FPE_FLTINV", "Invalid floating-point operation." },
+ { SIGFPE, FPE_FLTSUB, "FPE_FLTSUB", "Subscript out of range." },
+ { SIGSEGV, SEGV_MAPERR, "SEGV_MAPERR", "Address not mapped to object." },
+ { SIGSEGV, SEGV_ACCERR, "SEGV_ACCERR", "Invalid permissions for mapped object." },
+#ifdef AIX
+ // no explanation found what keyerr would be
+ { SIGSEGV, SEGV_KEYERR, "SEGV_KEYERR", "key error" },
+#endif
+#if defined(IA64) && !defined(AIX)
+ { SIGSEGV, SEGV_PSTKOVF, "SEGV_PSTKOVF", "Paragraph stack overflow" },
+#endif
+ { SIGBUS, BUS_ADRALN, "BUS_ADRALN", "Invalid address alignment." },
+ { SIGBUS, BUS_ADRERR, "BUS_ADRERR", "Nonexistent physical address." },
+ { SIGBUS, BUS_OBJERR, "BUS_OBJERR", "Object-specific hardware error." },
+ { SIGTRAP, TRAP_BRKPT, "TRAP_BRKPT", "Process breakpoint." },
+ { SIGTRAP, TRAP_TRACE, "TRAP_TRACE", "Process trace trap." },
+ { SIGCHLD, CLD_EXITED, "CLD_EXITED", "Child has exited." },
+ { SIGCHLD, CLD_KILLED, "CLD_KILLED", "Child has terminated abnormally and did not create a core file." },
+ { SIGCHLD, CLD_DUMPED, "CLD_DUMPED", "Child has terminated abnormally and created a core file." },
+ { SIGCHLD, CLD_TRAPPED, "CLD_TRAPPED", "Traced child has trapped." },
+ { SIGCHLD, CLD_STOPPED, "CLD_STOPPED", "Child has stopped." },
+ { SIGCHLD, CLD_CONTINUED,"CLD_CONTINUED","Stopped child has continued." },
+#ifdef SIGPOLL
+ { SIGPOLL, POLL_OUT, "POLL_OUT", "Output buffers available." },
+ { SIGPOLL, POLL_MSG, "POLL_MSG", "Input message available." },
+ { SIGPOLL, POLL_ERR, "POLL_ERR", "I/O error." },
+ { SIGPOLL, POLL_PRI, "POLL_PRI", "High priority input available." },
+ { SIGPOLL, POLL_HUP, "POLL_HUP", "Device disconnected. [Option End]" },
+#endif
+ { -1, -1, NULL, NULL }
+ };
+
+ // Codes valid in any signal context.
+ const struct {
+ int code; const char* s_code; const char* s_desc;
+ } t2 [] = {
+ { SI_USER, "SI_USER", "Signal sent by kill()." },
+ { SI_QUEUE, "SI_QUEUE", "Signal sent by the sigqueue()." },
+ { SI_TIMER, "SI_TIMER", "Signal generated by expiration of a timer set by timer_settime()." },
+ { SI_ASYNCIO, "SI_ASYNCIO", "Signal generated by completion of an asynchronous I/O request." },
+ { SI_MESGQ, "SI_MESGQ", "Signal generated by arrival of a message on an empty message queue." },
+ // Linux specific
+#ifdef SI_TKILL
+ { SI_TKILL, "SI_TKILL", "Signal sent by tkill (pthread_kill)" },
+#endif
+#ifdef SI_DETHREAD
+ { SI_DETHREAD, "SI_DETHREAD", "Signal sent by execve() killing subsidiary threads" },
+#endif
+#ifdef SI_KERNEL
+ { SI_KERNEL, "SI_KERNEL", "Signal sent by kernel." },
+#endif
+#ifdef SI_SIGIO
+ { SI_SIGIO, "SI_SIGIO", "Signal sent by queued SIGIO" },
+#endif
+
+#ifdef AIX
+ { SI_UNDEFINED, "SI_UNDEFINED","siginfo contains partial information" },
+ { SI_EMPTY, "SI_EMPTY", "siginfo contains no useful information" },
+#endif
+
+#ifdef __sun
+ { SI_NOINFO, "SI_NOINFO", "No signal information" },
+ { SI_RCTL, "SI_RCTL", "kernel generated signal via rctl action" },
+ { SI_LWP, "SI_LWP", "Signal sent via lwp_kill" },
+#endif
+
+ { -1, NULL, NULL }
+ };
+
+ const char* s_code = NULL;
+ const char* s_desc = NULL;
+
+ for (int i = 0; t1[i].sig != -1; i ++) {
+ if (t1[i].sig == si->si_signo && t1[i].code == si->si_code) {
+ s_code = t1[i].s_code;
+ s_desc = t1[i].s_desc;
+ break;
+ }
+ }
+
+ if (s_code == NULL) {
+ for (int i = 0; t2[i].s_code != NULL; i ++) {
+ if (t2[i].code == si->si_code) {
+ s_code = t2[i].s_code;
+ s_desc = t2[i].s_desc;
+ }
+ }
+ }
+
+ if (s_code == NULL) {
+ out->s_name = "unknown";
+ out->s_desc = "unknown";
+ return false;
+ }
+
+ out->s_name = s_code;
+ out->s_desc = s_desc;
+
+ return true;
+}
+
+// A POSIX conform, platform-independend siginfo print routine.
+// Short print out on one line.
+void os::Posix::print_siginfo_brief(outputStream* os, const siginfo_t* si) {
+ char buf[20];
+ os->print("siginfo: ");
+
+ if (!si) {
+ os->print("<null>");
+ return;
+ }
+
+ // See print_siginfo_full() for details.
+ const int sig = si->si_signo;
+
+ os->print("si_signo: %d (%s)", sig, os::Posix::get_signal_name(sig, buf, sizeof(buf)));
+
+ enum_sigcode_desc_t ed;
+ if (get_signal_code_description(si, &ed)) {
+ os->print(", si_code: %d (%s)", si->si_code, ed.s_name);
+ } else {
+ os->print(", si_code: %d (unknown)", si->si_code);
+ }
+
+ if (si->si_errno) {
+ os->print(", si_errno: %d", si->si_errno);
+ }
+
+ const int me = (int) ::getpid();
+ const int pid = (int) si->si_pid;
+
+ if (si->si_code == SI_USER || si->si_code == SI_QUEUE) {
+ if (IS_VALID_PID(pid) && pid != me) {
+ os->print(", sent from pid: %d (uid: %d)", pid, (int) si->si_uid);
+ }
+ } else if (sig == SIGSEGV || sig == SIGBUS || sig == SIGILL ||
+ sig == SIGTRAP || sig == SIGFPE) {
+ os->print(", si_addr: " PTR_FORMAT, si->si_addr);
+#ifdef SIGPOLL
+ } else if (sig == SIGPOLL) {
+ os->print(", si_band: " PTR64_FORMAT, (uint64_t)si->si_band);
+#endif
+ } else if (sig == SIGCHLD) {
+ os->print_cr(", si_pid: %d, si_uid: %d, si_status: %d", (int) si->si_pid, si->si_uid, si->si_status);
+ }
+}
+
os::WatcherThreadCrashProtection::WatcherThreadCrashProtection() {
assert(Thread::current()->is_Watcher_thread(), "Must be WatcherThread");
}
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