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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] libxc portability fixes for NetBSD.
# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1190212976 -3600
# Node ID 177ebf350b4c37a5ed83ac1475d2ebd1f482f926
# Parent b21ba95c686bbfc5b69f34ef2760e979d30075ce
libxc portability fixes for NetBSD.
- use MAP_ANON, that is what both (BSD-)Unix and Linux have
- change last_error handling to use pthreads
- round mlock() parameters to page alignment
- cleanup: No need to include <xen/sys/privcmd.h>
a second time in xg_private.h
Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
tools/libxc/xc_dom_core.c | 4 -
tools/libxc/xc_private.c | 97 +++++++++++++++++++++++++++++++++++++---------
tools/libxc/xg_private.h | 1
3 files changed, 82 insertions(+), 20 deletions(-)
diff -r b21ba95c686b -r 177ebf350b4c tools/libxc/xc_dom_core.c
--- a/tools/libxc/xc_dom_core.c Wed Sep 19 15:20:56 2007 +0100
+++ b/tools/libxc/xc_dom_core.c Wed Sep 19 15:42:56 2007 +0100
@@ -122,7 +122,7 @@ void *xc_dom_malloc_page_aligned(struct
memset(block, 0, sizeof(*block));
block->mmap_len = size;
block->mmap_ptr = mmap(NULL, block->mmap_len,
- PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON,
-1, 0);
if ( block->mmap_ptr == MAP_FAILED )
{
@@ -354,7 +354,7 @@ void *xc_dom_pfn_to_ptr(struct xc_dom_im
{
mode = "anonymous memory";
phys->ptr = mmap(NULL, phys->count << page_shift,
- PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
+ PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON,
-1, 0);
if ( phys->ptr == MAP_FAILED )
{
diff -r b21ba95c686b -r 177ebf350b4c tools/libxc/xc_private.c
--- a/tools/libxc/xc_private.c Wed Sep 19 15:20:56 2007 +0100
+++ b/tools/libxc/xc_private.c Wed Sep 19 15:42:56 2007 +0100
@@ -10,7 +10,12 @@
#include <stdarg.h>
#include <pthread.h>
-static __thread xc_error last_error = { XC_ERROR_NONE, ""};
+static pthread_key_t last_error_pkey;
+static pthread_once_t last_error_pkey_once = PTHREAD_ONCE_INIT;
+
+static pthread_key_t errbuf_pkey;
+static pthread_once_t errbuf_pkey_once = PTHREAD_ONCE_INIT;
+
#if DEBUG
static xc_error_handler error_handler = xc_default_error_handler;
#else
@@ -23,15 +28,45 @@ void xc_default_error_handler(const xc_e
fprintf(stderr, "ERROR %s: %s\n", desc, err->message);
}
+static void
+_xc_clean_last_error(void *m)
+{
+ free(m);
+ pthread_setspecific(last_error_pkey, NULL);
+}
+
+static void
+_xc_init_last_error(void)
+{
+ pthread_key_create(&last_error_pkey, _xc_clean_last_error);
+}
+
+static xc_error *
+_xc_get_last_error(void)
+{
+ xc_error *last_error;
+
+ pthread_once(&last_error_pkey_once, _xc_init_last_error);
+
+ last_error = pthread_getspecific(last_error_pkey);
+ if (last_error == NULL) {
+ last_error = malloc(sizeof(xc_error));
+ pthread_setspecific(last_error_pkey, last_error);
+ }
+
+ return last_error;
+}
+
const xc_error *xc_get_last_error(void)
{
- return &last_error;
+ return _xc_get_last_error();
}
void xc_clear_last_error(void)
{
- last_error.code = XC_ERROR_NONE;
- last_error.message[0] = '\0';
+ xc_error *last_error = _xc_get_last_error();
+ last_error->code = XC_ERROR_NONE;
+ last_error->message[0] = '\0';
}
const char *xc_error_code_to_desc(int code)
@@ -61,12 +96,12 @@ xc_error_handler xc_set_error_handler(xc
return old;
}
-
static void _xc_set_error(int code, const char *msg)
{
- last_error.code = code;
- strncpy(last_error.message, msg, XC_MAX_ERROR_MSG_LEN - 1);
- last_error.message[XC_MAX_ERROR_MSG_LEN-1] = '\0';
+ xc_error *last_error = _xc_get_last_error();
+ last_error->code = code;
+ strncpy(last_error->message, msg, XC_MAX_ERROR_MSG_LEN - 1);
+ last_error->message[XC_MAX_ERROR_MSG_LEN-1] = '\0';
}
void xc_set_error(int code, const char *fmt, ...)
@@ -84,23 +119,29 @@ void xc_set_error(int code, const char *
errno = saved_errno;
- if ( error_handler != NULL )
- error_handler(&last_error);
+ if ( error_handler != NULL ) {
+ xc_error *last_error = _xc_get_last_error();
+ error_handler(last_error);
+ }
}
int lock_pages(void *addr, size_t len)
{
int e = 0;
#ifndef __sun__
- e = mlock(addr, len);
-#endif
- return (e);
+ void *laddr = (void *)((unsigned long)addr & PAGE_MASK);
+ size_t llen = (len + PAGE_SIZE - 1) & PAGE_MASK;
+ e = mlock(laddr, llen);
+#endif
+ return e;
}
void unlock_pages(void *addr, size_t len)
{
#ifndef __sun__
- safe_munlock(addr, len);
+ void *laddr = (void *)((unsigned long)addr & PAGE_MASK);
+ size_t llen = (len + PAGE_SIZE - 1) & PAGE_MASK;
+ safe_munlock(laddr, llen);
#endif
}
@@ -466,11 +507,33 @@ unsigned long xc_make_page_below_4G(
return new_mfn;
}
+static void
+_xc_clean_errbuf(void * m)
+{
+ free(m);
+ pthread_setspecific(errbuf_pkey, NULL);
+}
+
+static void
+_xc_init_errbuf(void)
+{
+ pthread_key_create(&errbuf_pkey, _xc_clean_errbuf);
+}
+
char *safe_strerror(int errcode)
{
- static __thread char errbuf[32];
+#define XS_BUFSIZE 32
+ char *errbuf;
static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
char *strerror_str;
+
+ pthread_once(&errbuf_pkey_once, _xc_init_errbuf);
+
+ errbuf = pthread_getspecific(errbuf_pkey);
+ if (errbuf == NULL) {
+ errbuf = malloc(XS_BUFSIZE);
+ pthread_setspecific(errbuf_pkey, errbuf);
+ }
/*
* Thread-unsafe strerror() is protected by a local mutex. We copy
@@ -478,8 +541,8 @@ char *safe_strerror(int errcode)
*/
pthread_mutex_lock(&mutex);
strerror_str = strerror(errcode);
- strncpy(errbuf, strerror_str, sizeof(errbuf));
- errbuf[sizeof(errbuf)-1] = '\0';
+ strncpy(errbuf, strerror_str, XS_BUFSIZE);
+ errbuf[XS_BUFSIZE-1] = '\0';
pthread_mutex_unlock(&mutex);
return errbuf;
diff -r b21ba95c686b -r 177ebf350b4c tools/libxc/xg_private.h
--- a/tools/libxc/xg_private.h Wed Sep 19 15:20:56 2007 +0100
+++ b/tools/libxc/xg_private.h Wed Sep 19 15:42:56 2007 +0100
@@ -15,7 +15,6 @@
#include "xenguest.h"
#include "xc_private.h"
-#include <xen/sys/privcmd.h>
#include <xen/memory.h>
#include <xen/elfnote.h>
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