fstat() in newer MinGWs is defined as non-static inline. With our new static
inline memset()/memcpy() overloads, this raises a warning. To avoid it,
explicitly include <sys/stat.h> once before defining these overloads.
These wrappers guarantee that calls to these functions are noops if the
number of bytes is 0, as calling them with NULL pointers is undefined
according to the C standard, even if the number of bytes is 0 (most
implementations probably ignore the pointers anyway in this case, but
lets make sure).
While Winsock provides many Posix compatibility functions, they do not set
errno, but use WSAGetLastError() for error reporting. The wrapped functions
derive an errno from WSAGetLastError() on failure.
Instead of using weak symbols, we use dlsym() on Windows to find an arbitrary
symbol in libtest to detect its linkage. Instead of creating the associated
hashtable in the test runner, we maintain it in libstrongswan, making it
significantly simpler.
Due to the removal of pthread_once, we manually create the seed for
chunk_hash(). With the new testable functions interface, this won't work for
the hashtable initiated using __attribute__((constructor)). Enforce seeding
before creating that hashtable.
This allows us to disable Unix sockets cleanly on Windows. Replaces some
read/write calls with recv/send counterparts, as Winsock does not like
read/writes.
While DbgHelp provides a convenient API to create backtraces, any executable
linking against DbgHelp gets a more than a significant slow down. Further, it
can only lookup global symbols, as it expects PDB files we can't produce with a
MinGW build.
With some core Kernel32.dll functionality, we can capture stack traces much
faster. Together with the optional libbfd, we can print very fine backtraces.
When --enable-bfd-backtraces is used on Windows, a libbfd.dll is required for
the build. Such a DLL can be created from the binutils sources using:
# build binutils with mingw...
# extract archive members from binutils libraries
x86_64-w64-mingw32-ar x $BINUTILS/bfd/.libs/libbfd.a
x86_64-w64-mingw32-ar x $BINUTILS/intl/libintl.a
x86_64-w64-mingw32-ar x $BINUTILS/libiberty/libiberty.a
# create self-contained libbfd.a, with index
x86_64-w64-mingw32-ar qs libbfd.a *.o
# create DLL from static library
x86_64-w64-mingw32-dlltool -e libbfd.o -l libbfd.lib libbfd.a
x86_64-w64-mingw32-gcc -shared libbfd.a libbfd.o -o libbfd.dll
Martin Willi