diff mbox

[2/2] linux-user: fix tcg/mmap test

Message ID 20170118150235.23850-2-bobby.prani@gmail.com
State New
Headers show

Commit Message

Pranith Kumar Jan. 18, 2017, 3:02 p.m. UTC 
From: Marc-André Lureau <marcandre.lureau@redhat.com>

tests/tcg/mmap test fails with values other than default target page
size. When creating a map beyond EOF, extra anonymous pages are added up
to the target page boundary. Currently, this operation is performed only
when qemu_real_host_page_size < TARGET_PAGE_SIZE, but it should be
performed if the configured page size (qemu -p) is larger than
qemu_real_host_page_size too.

(also fixes some style issues to please checkpatch)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
---
 linux-user/mmap.c | 27 ++++++++++++++-------------
 1 file changed, 14 insertions(+), 13 deletions(-)

Comments

Peter Maydell Jan. 18, 2017, 4:21 p.m. UTC | #1 
On 18 January 2017 at 15:02, Pranith Kumar <bobby.prani@gmail.com> wrote:
> From: Marc-André Lureau <marcandre.lureau@redhat.com>
>
> tests/tcg/mmap test fails with values other than default target page
> size. When creating a map beyond EOF, extra anonymous pages are added up
> to the target page boundary. Currently, this operation is performed only
> when qemu_real_host_page_size < TARGET_PAGE_SIZE, but it should be
> performed if the configured page size (qemu -p) is larger than
> qemu_real_host_page_size too.
>
> (also fixes some style issues to please checkpatch)
>
> Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
> Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>

This got reviewed-by with caveats from two people when
it was last sent but you have neither included the R-by
tags nor addressed the minor tweaks they asked you to
address.

thanks
-- PMM
diff mbox

Patch

diff --git a/linux-user/mmap.c b/linux-user/mmap.c
index 61685bf79e..0794a4396a 100644
--- a/linux-user/mmap.c
+++ b/linux-user/mmap.c
@@ -418,31 +418,32 @@  abi_long target_mmap(abi_ulong start, abi_ulong len, int prot,
     }
 
     /* When mapping files into a memory area larger than the file, accesses
-       to pages beyond the file size will cause a SIGBUS. 
+       to pages beyond the file size will cause a SIGBUS.
 
        For example, if mmaping a file of 100 bytes on a host with 4K pages
        emulating a target with 8K pages, the target expects to be able to
        access the first 8K. But the host will trap us on any access beyond
-       4K.  
+       4K.
 
        When emulating a target with a larger page-size than the hosts, we
        may need to truncate file maps at EOF and add extra anonymous pages
        up to the targets page boundary.  */
 
-    if ((qemu_real_host_page_size < TARGET_PAGE_SIZE)
-        && !(flags & MAP_ANONYMOUS)) {
-       struct stat sb;
+    if ((qemu_real_host_page_size < qemu_host_page_size) &&
+        !(flags & MAP_ANONYMOUS)) {
+        struct stat sb;
 
-       if (fstat (fd, &sb) == -1)
-           goto fail;
+        if (fstat(fd, &sb) == -1) {
+            goto fail;
+        }
 
        /* Are we trying to create a map beyond EOF?.  */
-       if (offset + len > sb.st_size) {
-           /* If so, truncate the file map at eof aligned with 
-              the hosts real pagesize. Additional anonymous maps
-              will be created beyond EOF.  */
-           len = REAL_HOST_PAGE_ALIGN(sb.st_size - offset);
-       }
+        if (offset + len > sb.st_size) {
+            /* If so, truncate the file map at eof aligned with
+               the hosts real pagesize. Additional anonymous maps
+               will be created beyond EOF.  */
+            len = REAL_HOST_PAGE_ALIGN(sb.st_size - offset);
+        }
     }
 
     if (!(flags & MAP_FIXED)) {