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authorUlrich Drepper <drepper@redhat.com>2003-05-09 07:53:33 +0000
committerUlrich Drepper <drepper@redhat.com>2003-05-09 07:53:33 +0000
commit880867a475b1016f892a1248a3fce693406bf1f1 (patch)
tree9b2456ac53d0959c24a8851beb1378b949f24338
parent92d83c725e09dbc76acfedc1cf85a01f9f54452d (diff)
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Update.
2003-05-09 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/x86_64/get_clockfreq.c: New file.
-rw-r--r--ChangeLog4
-rw-r--r--nptl/ChangeLog9
-rw-r--r--nptl/allocatestack.c8
-rw-r--r--nptl/sysdeps/unix/sysv/linux/x86_64/Makefile3
-rw-r--r--nptl/sysdeps/x86_64/pthreaddef.h11
-rw-r--r--sysdeps/unix/sysv/linux/x86_64/get_clockfreq.c1
6 files changed, 32 insertions, 4 deletions
diff --git a/ChangeLog b/ChangeLog
index b3f893bde7..06559ea963 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2003-05-09 Ulrich Drepper <drepper@redhat.com>
+
+ * sysdeps/unix/sysv/linux/x86_64/get_clockfreq.c: New file.
+
2003-05-08 Ulrich Drepper <drepper@redhat.com>
* malloc/thread-m.h: Remove special handling of thread_atfork if
diff --git a/nptl/ChangeLog b/nptl/ChangeLog
index 7bd8025850..f46c221c9a 100644
--- a/nptl/ChangeLog
+++ b/nptl/ChangeLog
@@ -1,3 +1,12 @@
+2003-05-09 Ulrich Drepper <drepper@redhat.com>
+
+ * allocatestack.c (allocate_stack): If ARCH_RETRY_MMAP is defined,
+ use it in case mmap to allocate the stack fails.
+ * sysdeps/unix/sysv/linux/x86_64/Makefile: Don't define
+ ARCH_MAP_FLAGS here.
+ * sysdeps/x86_64/pthreaddef.h: Define ARCH_MAP_FLAGS and
+ ARCH_RETRY_MMAP.
+
2003-05-08 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/fork.c: Complete rewrite of the atfork
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c
index 680f365e04..95ee992a18 100644
--- a/nptl/allocatestack.c
+++ b/nptl/allocatestack.c
@@ -393,7 +393,13 @@ allocate_stack (const struct pthread_attr *attr, struct pthread **pdp,
MAP_PRIVATE | MAP_ANONYMOUS | ARCH_MAP_FLAGS, -1, 0);
if (__builtin_expect (mem == MAP_FAILED, 0))
- return errno;
+ {
+#ifdef ARCH_RETRY_MMAP
+ mem = ARCH_RETRY_MMAP (size);
+ if (__builtin_expect (mem == MAP_FAILED, 0))
+#endif
+ return errno;
+ }
/* SIZE is guaranteed to be greater than zero.
So we can never get a null pointer back from mmap. */
diff --git a/nptl/sysdeps/unix/sysv/linux/x86_64/Makefile b/nptl/sysdeps/unix/sysv/linux/x86_64/Makefile
index 9ecb7b092a..d3e5eb54d7 100644
--- a/nptl/sysdeps/unix/sysv/linux/x86_64/Makefile
+++ b/nptl/sysdeps/unix/sysv/linux/x86_64/Makefile
@@ -1,6 +1,3 @@
ifeq ($(subdir),nptl)
CFLAGS-pt-initfini.s = -g0 -fPIC -fno-inline-functions -fno-asynchronous-unwind-tables
-
-# We need to make sure that stack memory is allocated in the low 4GB.
-CFLAGS-pthread_create.c += -DARCH_MAP_FLAGS=MAP_32BIT
endif
diff --git a/nptl/sysdeps/x86_64/pthreaddef.h b/nptl/sysdeps/x86_64/pthreaddef.h
index 90a67f1751..27896a445c 100644
--- a/nptl/sysdeps/x86_64/pthreaddef.h
+++ b/nptl/sysdeps/x86_64/pthreaddef.h
@@ -36,6 +36,17 @@
({ char *frame; asm ("movq %%rsp, %0" : "=r" (frame)); frame; })
+/* We prefer to have the stack allocated in the low 4GB since this
+ allows faster context switches. */
+#define ARCH_MAP_FLAGS MAP_32BIT
+
+/* If it is not possible to allocate memory there retry without that
+ flag. */
+#define ARCH_RETRY_MMAP(size) \
+ mmap (NULL, size, PROT_READ | PROT_WRITE | PROT_EXEC, \
+ MAP_PRIVATE | MAP_ANONYMOUS, -1, 0)
+
+
/* XXX Until we have a better place keep the definitions here. */
/* While there is no such syscall. */
diff --git a/sysdeps/unix/sysv/linux/x86_64/get_clockfreq.c b/sysdeps/unix/sysv/linux/x86_64/get_clockfreq.c
new file mode 100644
index 0000000000..a58d40a9c1
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/x86_64/get_clockfreq.c
@@ -0,0 +1 @@
+#include "../i386/get_clockfreq.c"