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Christopher Faylor <cgf@redhat.com>

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* init.cc (munge_threadfunc): Handle all instances of search_for.
(prime_threads): Test threadfunc_ix[0].
This commit is contained in:
Christopher Faylor 2004-03-22 18:30:38 +00:00
parent 8ec98d6c38
commit 6b89a541db
2 changed files with 22 additions and 18 deletions
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6
winsup/cygwin/ChangeLog
View File

@ -1,3 +1,9 @@
2004-03-19 Pierre Humblet <pierre.humblet@ieee.org>
Christopher Faylor <cgf@redhat.com>
* init.cc (munge_threadfunc): Handle all instances of search_for.
(prime_threads): Test threadfunc_ix[0].
2004-03-21 Christopher Faylor <cgf@redhat.com> 2004-03-21 Christopher Faylor <cgf@redhat.com>
* cygheap.cc (init_cheap): Set initial_sz to something or suffer * cygheap.cc (init_cheap): Set initial_sz to something or suffer

28
winsup/cygwin/init.cc
View File

@ -17,7 +17,7 @@ details. */
int NO_COPY dynamically_loaded; int NO_COPY dynamically_loaded;
static char *search_for = (char *) cygthread::stub; static char *search_for = (char *) cygthread::stub;
unsigned threadfunc_ix __attribute__((section ("cygwin_dll_common"), shared)) = 0; unsigned threadfunc_ix[8] __attribute__((section ("cygwin_dll_common"), shared));
DWORD tls_func; DWORD tls_func;
HANDLE sync_startup; HANDLE sync_startup;
@ -45,7 +45,7 @@ calibration_thread (VOID *arg)
void void
prime_threads () prime_threads ()
{ {
if (!threadfunc_ix) if (!threadfunc_ix[0])
{ {
DWORD id; DWORD id;
search_for = (char *) calibration_thread; search_for = (char *) calibration_thread;
@ -58,32 +58,30 @@ prime_threads ()
static void static void
munge_threadfunc () munge_threadfunc ()
{ {
int i;
char **ebp = (char **) __builtin_frame_address (0); char **ebp = (char **) __builtin_frame_address (0);
if (!threadfunc_ix) if (!threadfunc_ix[0])
{ {
for (char **peb = ebp; peb < (char **) _tlsbase; peb++) char **peb;
char **top = (char **) _tlsbase;
for (peb = ebp, i = 0; peb < top && i < 7; peb++)
if (*peb == search_for) if (*peb == search_for)
threadfunc_ix[i++] = peb - ebp;
if (!threadfunc_ix[0])
{ {
threadfunc_ix = peb - ebp;
goto foundit;
}
#ifdef DEBUGGING_HARD
system_printf ("non-fatal warning: unknown thread! search_for %p, cygthread::stub %p, calibration_thread %p, possible func offset %p",
search_for, cygthread::stub, calibration_thread, ebp[137]);
#endif
try_to_debug (); try_to_debug ();
return; return;
} }
}
foundit: char *threadfunc = ebp[threadfunc_ix[0]];
char *threadfunc = ebp[threadfunc_ix];
if (threadfunc == (char *) calibration_thread) if (threadfunc == (char *) calibration_thread)
/* no need for the overhead */; /* no need for the overhead */;
else else
{ {
ebp[threadfunc_ix] = (char *) threadfunc_fe; for (i = 0; threadfunc_ix[i]; i++)
ebp[threadfunc_ix[i]] = (char *) threadfunc_fe;
((char **) _tlsbase)[OLDFUNC_OFFSET] = threadfunc; ((char **) _tlsbase)[OLDFUNC_OFFSET] = threadfunc;
// TlsSetValue (tls_func, (void *) threadfunc);
} }
} }