On Wed, 8 Mar 2023 11:30:27 GMT, Daniel Jeliński <djelin...@openjdk.org> wrote:
> This patch modifies the `getLastErrorString` method to return a `jstring`.
> Thanks to that we can avoid unnecessary back and forth conversions between
> Unicode and other charsets on Windows.
>
> Other changes include:
> - the Windows implementation of `getLastErrorString` no longer checks
> `errno`. I verified all uses of the method and confirmed that `errno` is not
> used anywhere.
> - While at it, I found and fixed a few calls to
> `JNU_ThrowIOExceptionWithLastError` that were done in context where
> `LastError` was not set.
> - jdk.hotspot.agent was modified to use `JNU_ThrowByNameWithLastError` and
> `JNU_ThrowByName` instead of `getLastErrorString`; the code is expected to
> have identical behavior.
> - zip_util was modified to return static messages instead of generated ones.
> The generated messages were not observed anywhere, because they were replaced
> by a static message in ZIP_Open, which is the only method used by other
> native code.
> - `getLastErrorString` is no longer exported by libjava.
>
> Tier1-3 tests continue to pass.
>
> No new automated regression test; testing this requires installing a language
> pack that cannot be displayed in the current code page.
> Tested this manually by installing Chinese language pack on English Windows
> 11, selecting Chinese language, then checking if the message on exception
> thrown by `InetAddress.getByName("nonexistent.local");` starts with
> `"不知道这样的主机。"` (or
> `"\u4e0d\u77e5\u9053\u8fd9\u6837\u7684\u4e3b\u673a\u3002"`). Without the
> change, the exception message started with a row of question marks.
Looks good (w/ some minor comments)
src/java.base/share/native/libzip/zip_util.c line 767:
> 765: * or NULL if an error occurred. If a zip error occurred then *pmsg will
> 766: * be set to the error message text if pmsg != 0. Otherwise, *pmsg will
> be
> 767: * set to NULL. Caller doesn't need to free the error message.
I'd put some more context here why the caller does not need to free. (as it is
a static text)
src/java.base/windows/native/libjava/jni_util_md.c line 80:
> 78: 0,
> 79: buf,
> 80: sizeof(buf) / sizeof(WCHAR),
Maybe better to #define the size 256 so that this division is not needed.
src/java.base/windows/native/libnio/ch/FileDispatcherImpl.c line 208:
> 206:
> 207: if (result == 0) {
> 208: JNU_ThrowIOExceptionWithLastError(env, "Write failed");
Could be replaced with `JNU_ThrowIOException`?
src/java.base/windows/native/libnio/ch/FileDispatcherImpl.c line 260:
> 258:
> 259: if (result == 0) {
> 260: JNU_ThrowIOExceptionWithLastError(env, "Write failed");
Same as above
src/java.base/windows/native/libnio/ch/FileDispatcherImpl.c line 299:
> 297:
> 298: if (result == 0) {
> 299: JNU_ThrowIOExceptionWithLastError(env, "Write failed");
Same here
-------------
PR: https://git.openjdk.org/jdk/pull/12922
