Fix a GDB assert failure on windows
A GDB internal error is found on native mingw32 target. (gdb) run ../../binutils-gdb/gdb/target.c:1483: internal-error: target_xfer_partial: Assertion `*xfered_len > 0' failed. A problem internal to GDB has been detected, further debugging may prove unreliable. Quit this debugging session? (y or n) This error was introduced by the following snippet in commit 9b409511d07fe375284701af34909fb539029caf > @@ -2536,27 +2538,30 @@ windows_xfer_shared_libraries (struct target_ops *ops, > } > > obstack_free (&obstack, NULL); > - return len; > + *xfered_len = (ULONGEST) len; > + return TARGET_XFER_OK; > } In the original code, len is returned, which could be 0, but after that commit, only TARGET_XFER_OK is returned, which is wrong. If len is 0, TARGET_XFER_EOF should be returned. (it is 0 in enum target_xfer_status declaration). gdb: 2014-02-24 Yuanhui Zhang <asmwarrior@gmail.com> * windows-nat.c (windows_xfer_shared_libraries): Return TARGET_XFER_EOF if LEN is zero to fix an assert failure when requested object is TARGET_OBJECT_LIBRARIES.
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@ -1,3 +1,9 @@
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2014-02-24 Yuanhui Zhang <asmwarrior@gmail.com>
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* windows-nat.c (windows_xfer_shared_libraries): Return
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TARGET_XFER_EOF if LEN is zero to fix an assert failure when
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requested object is TARGET_OBJECT_LIBRARIES.
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2014-02-24 Yao Qi <yao@codesourcery.com>
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* target.h (enum target_xfer_status)
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@ -2501,7 +2501,7 @@ windows_xfer_shared_libraries (struct target_ops *ops,
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obstack_free (&obstack, NULL);
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*xfered_len = (ULONGEST) len;
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return TARGET_XFER_OK;
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return len != 0 ? TARGET_XFER_OK : TARGET_XFER_EOF;
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}
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static enum target_xfer_status
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