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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /nsprpub/pr/src/md/unix/hpux.c
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'nsprpub/pr/src/md/unix/hpux.c')
-rw-r--r--nsprpub/pr/src/md/unix/hpux.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/nsprpub/pr/src/md/unix/hpux.c b/nsprpub/pr/src/md/unix/hpux.c
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "primpl.h"
+#include <setjmp.h>
+
+#if defined(HPUX_LW_TIMER)
+
+#include <machine/inline.h>
+#include <machine/clock.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <sys/pstat.h>
+
+int __lw_get_thread_times(int which, int64_t *sample, int64_t *time);
+
+static double msecond_per_itick;
+
+void _PR_HPUX_LW_IntervalInit(void)
+{
+ struct pst_processor psp;
+ int iticksperclktick, clk_tck;
+ int rv;
+
+ rv = pstat_getprocessor(&psp, sizeof(psp), 1, 0);
+ PR_ASSERT(rv != -1);
+
+ iticksperclktick = psp.psp_iticksperclktick;
+ clk_tck = sysconf(_SC_CLK_TCK);
+ msecond_per_itick = (1000.0)/(double)(iticksperclktick * clk_tck);
+}
+
+PRIntervalTime _PR_HPUX_LW_GetInterval(void)
+{
+ int64_t time, sample;
+
+ __lw_get_thread_times(1, &sample, &time);
+ /*
+ * Division is slower than float multiplication.
+ * return (time / iticks_per_msecond);
+ */
+ return (time * msecond_per_itick);
+}
+#endif /* HPUX_LW_TIMER */
+
+#if !defined(PTHREADS_USER)
+
+void _MD_EarlyInit(void)
+{
+#ifndef _PR_PTHREADS
+ /*
+ * The following piece of code is taken from ns/nspr/src/md_HP-UX.c.
+ * In the comment for revision 1.6, dated 1995/09/11 23:33:34,
+ * robm says:
+ * This version has some problems which need to be addressed.
+ * First, intercept all system calls and prevent them from
+ * executing the library code which performs stack switches
+ * before normal system call invocation. In order for library
+ * calls which make system calls to work (like stdio), however,
+ * we must also allocate our own stack and switch the primordial
+ * stack to use it. This isn't so bad, except that I fudged the
+ * backtrace length when copying the old stack to the new one.
+ *
+ * This is the original comment of robm in the code:
+ * XXXrobm Horrific. To avoid a problem with HP's system call
+ * code, we allocate a new stack for the primordial thread and
+ * use it. However, we don't know how far back the original stack
+ * goes. We should create a routine that performs a backtrace and
+ * finds out just how much we need to copy. As a temporary measure,
+ * I just copy an arbitrary guess.
+ *
+ * In an email to servereng dated 2 Jan 1997, Mike Patnode (mikep)
+ * suggests that this only needs to be done for HP-UX 9.
+ */
+#ifdef HPUX9
+#define PIDOOMA_STACK_SIZE 524288
+#define BACKTRACE_SIZE 8192
+ {
+ jmp_buf jb;
+ char *newstack;
+ char *oldstack;
+
+ if(!setjmp(jb)) {
+ newstack = (char *) PR_MALLOC(PIDOOMA_STACK_SIZE);
+ oldstack = (char *) (*(((int *) jb) + 1) - BACKTRACE_SIZE);
+ memcpy(newstack, oldstack, BACKTRACE_SIZE);
+ *(((int *) jb) + 1) = (int) (newstack + BACKTRACE_SIZE);
+ longjmp(jb, 1);
+ }
+ }
+#endif /* HPUX9 */
+#endif /* !_PR_PTHREADS */
+}
+
+PRWord *_MD_HomeGCRegisters(PRThread *t, int isCurrent, int *np)
+{
+#ifndef _PR_PTHREADS
+ if (isCurrent) {
+ (void) setjmp(CONTEXT(t));
+ }
+ *np = sizeof(CONTEXT(t)) / sizeof(PRWord);
+ return (PRWord *) CONTEXT(t);
+#else
+ *np = 0;
+ return NULL;
+#endif
+}
+
+#ifndef _PR_PTHREADS
+void
+_MD_SET_PRIORITY(_MDThread *thread, PRUintn newPri)
+{
+ return;
+}
+
+PRStatus
+_MD_InitializeThread(PRThread *thread)
+{
+ return PR_SUCCESS;
+}
+
+PRStatus
+_MD_WAIT(PRThread *thread, PRIntervalTime ticks)
+{
+ PR_ASSERT(!(thread->flags & _PR_GLOBAL_SCOPE));
+ _PR_MD_SWITCH_CONTEXT(thread);
+ return PR_SUCCESS;
+}
+
+PRStatus
+_MD_WAKEUP_WAITER(PRThread *thread)
+{
+ if (thread) {
+ PR_ASSERT(!(thread->flags & _PR_GLOBAL_SCOPE));
+ }
+ return PR_SUCCESS;
+}
+
+/* These functions should not be called for HP-UX */
+void
+_MD_YIELD(void)
+{
+ PR_NOT_REACHED("_MD_YIELD should not be called for HP-UX.");
+}
+
+PRStatus
+_MD_CREATE_THREAD(
+ PRThread *thread,
+ void (*start) (void *),
+ PRThreadPriority priority,
+ PRThreadScope scope,
+ PRThreadState state,
+ PRUint32 stackSize)
+{
+ PR_NOT_REACHED("_MD_CREATE_THREAD should not be called for HP-UX.");
+}
+#endif /* _PR_PTHREADS */
+
+void
+_MD_suspend_thread(PRThread *thread)
+{
+#ifdef _PR_PTHREADS
+#endif
+}
+
+void
+_MD_resume_thread(PRThread *thread)
+{
+#ifdef _PR_PTHREADS
+#endif
+}
+#endif /* PTHREADS_USER */
+
+/*
+ * The HP version of strchr is buggy. It looks past the end of the
+ * string and causes a segmentation fault when our (NSPR) version
+ * of malloc is used.
+ *
+ * A better solution might be to put a cushion in our malloc just in
+ * case HP's version of strchr somehow gets used instead of this one.
+ */
+char *
+strchr(const char *s, int c)
+{
+ char ch;
+
+ if (!s) {
+ return NULL;
+ }
+
+ ch = (char) c;
+
+ while ((*s) && ((*s) != ch)) {
+ s++;
+ }
+
+ if ((*s) == ch) {
+ return (char *) s;
+ }
+
+ return NULL;
+}
+
+/*
+ * Implemementation of memcmp in HP-UX (verified on releases A.09.03,
+ * A.09.07, and B.10.10) dumps core if called with:
+ * 1. First operand with address = 1(mod 4).
+ * 2. Size = 1(mod 4)
+ * 3. Last byte of the second operand is the last byte of the page and
+ * next page is not accessible(not mapped or protected)
+ * Thus, using the following naive version (tons of optimizations are
+ * possible;^)
+ */
+
+int memcmp(const void *s1, const void *s2, size_t n)
+{
+ register unsigned char *p1 = (unsigned char *) s1,
+ *p2 = (unsigned char *) s2;
+
+ while (n-- > 0) {
+ register int r = ((int) ((unsigned int) *p1))
+ - ((int) ((unsigned int) *p2));
+ if (r) return r;
+ p1++; p2++;
+ }
+ return 0;
+}