Hi, Han
The test code is as follows:
#include <stdio.h>
#include <dlfcn.h>
int main()
{
if
(!dlopen("swift-3.0-preview-1-ubuntu14.04/usr/lib/swift/linux/libswiftCore.so",
RTLD_LAZY | RTLD_GLOBAL))
fprintf(stderr, "%s\n", dlerror());
}
The executable stack flag is queried as follows:
sudo execstack -q
swift-3.0-preview-1-ubuntu14.04/usr/lib/swift/linux/libswiftCore.so
If the executable stack flag is set, the stderr output is as follows:
swift-3.0-preview-1-ubuntu14.04/usr/lib/swift/linux/libswiftCore.so: cannot
enable executable stack as shared object requires: Invalid argument
And strace ouput tail is as follows:
mprotect(0x7ffffe5c3000, 4096,
PROT_READ|PROT_WRITE|PROT_EXEC|PROT_GROWSDOWN) = -1 EINVAL (Invalid
argument)
close(3) = 0
write(2, "swift-3.0-preview-1-ubuntu14.04/"...,
144swift-3.0-preview-1-ubuntu14.04/usr/lib/swift/linux/libswiftCore.so:
cannot enable executable stack as shared object requires: Invalid argument)
= 144
exit_group(144) = ?
+++ exited with 144 +++
If the executable stack flag is cleared by using execstack -c option, there
is no error.
Of course on Ubuntu 14.04 there is no error with the executable stack flag
on.
To clarify my request, I don't know how the Swift shared libraries'
executable stack flag has been set since Febrary 25 snapshot because
Febrary 8 snapshot and Swift 2.X branches have no such executable stack
shared libraries.
I tested on WSL Build 14366.
Thanks.
···
On Wed, Jun 15, 2016 at 9:48 AM, Sangjin Han <tinysun.net@gmail.com> wrote:
Hi, Kim.
I have the WSL on Windows Preview.
Could you show the test source/command ?
-Han Sangjin