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win32: wrap socket close() with an exception handler

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Since commit abe34282 ("win32: avoid mixing SOCKET and file descriptor
space"), we set HANDLE_FLAG_PROTECT_FROM_CLOSE on the socket FD, to
prevent closing the HANDLE with CloseHandle. This raises an exception
which under gdb is fatal, and qemu exits.

Let's catch the expected error instead.

Note: this appears to work, but the mingw64 macro is not well documented
or tested, and it's not obvious how it is meant to be used.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230515132440.1025315-1-marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau 2023-05-15 17:24:40 +04:00
parent 0b31e48d62
commit d89f30b4df
2 changed files with 21 additions and 6 deletions
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4
include/sysemu/os-win32.h
View file

@ -259,6 +259,10 @@ ssize_t qemu_recv_wrap(int sockfd, void *buf, size_t len, int flags);
ssize_t qemu_recvfrom_wrap(int sockfd, void *buf, size_t len, int flags,
struct sockaddr *addr, socklen_t *addrlen);
EXCEPTION_DISPOSITION
win32_close_exception_handler(struct _EXCEPTION_RECORD*, void*,
struct _CONTEXT*, void*);
#ifdef __cplusplus
}
#endif