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Fix issue 4884, preventing a crash in the socket code when python is compiled 

with llvm-gcc and run with a glibc <2.10.
This commit is contained in:
Jeffrey Yasskin 2009-01-09 16:47:07 +00:00
parent 343b970da9
commit d89f5b20b2
2 changed files with 14 additions and 1 deletions
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9
Include/pyport.h
View File

@ -709,6 +709,15 @@ typedef struct fd_set {
#define Py_FORMAT_PARSETUPLE(func,p1,p2)
#endif
/*
* Specify alignment on compilers that support it.
*/
#if defined(__GNUC__) && __GNUC__ >= 3
#define Py_ALIGNED(x) __attribute__((aligned(x)))
#else
#define Py_ALIGNED(x)
#endif
/* Eliminate end-of-loop code not reached warnings from SunPro C
* when using do{...}while(0) macros
*/

6
Modules/socketmodule.c
View File

@ -3334,7 +3334,11 @@ socket_gethostbyaddr(PyObject *self, PyObject *args)
#ifdef HAVE_GETHOSTBYNAME_R_3_ARG
struct hostent_data data;
#else
char buf[16384];
/* glibcs up to 2.10 assume that the buf argument to
gethostbyaddr_r is 8-byte aligned, which at least llvm-gcc
does not ensure. The attribute below instructs the compiler
to maintain this alignment. */
char buf[16384] Py_ALIGNED(8);
int buf_len = (sizeof buf) - 1;
int errnop;
#endif