The Tor Browser: comparison nsprpub/pr/src/md/unix/hpux.c

--1:000000000000
+:aa3c3a3816f4
+/* -*- 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;
+}

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comparison: nsprpub/pr/src/md/unix/hpux.c

nsprpub/pr/src/md/unix/hpux.c