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#include "config.h"
#if defined(HAVE_SGEN_GC) && defined(HOST_WIN32)
#include "io-layer/io-layer.h"
#include "metadata/sgen-gc.h"
#include "metadata/gc-internal.h"
gboolean
sgen_resume_thread (SgenThreadInfo *info)
{
DWORD id = mono_thread_info_get_tid (info);
HANDLE handle = OpenThread (THREAD_ALL_ACCESS, FALSE, id);
DWORD result;
g_assert (handle);
result = ResumeThread (handle);
g_assert (result != (DWORD)-1);
CloseHandle (handle);
return result != (DWORD)-1;
}
gboolean
sgen_suspend_thread (SgenThreadInfo *info)
{
DWORD id = mono_thread_info_get_tid (info);
HANDLE handle = OpenThread (THREAD_ALL_ACCESS, FALSE, id);
CONTEXT context;
DWORD result;
g_assert (id != GetCurrentThreadId ());
g_assert (handle);
result = SuspendThread (handle);
if (result == (DWORD)-1) {
fprintf (stderr, "could not suspend thread %x (handle %p): %d\n", id, handle, GetLastError ()); fflush (stderr);
CloseHandle (handle);
return FALSE;
}
context.ContextFlags = CONTEXT_INTEGER | CONTEXT_CONTROL;
if (!GetThreadContext (handle, &context)) {
g_assert_not_reached ();
ResumeThread (handle);
CloseHandle (handle);
return FALSE;
}
g_assert (context.ContextFlags & CONTEXT_INTEGER);
g_assert (context.ContextFlags & CONTEXT_CONTROL);
CloseHandle (handle);
info->stopped_ip = (gpointer)context.Eip;
info->stack_start = (char*)context.Esp - REDZONE_SIZE;
#ifdef USE_MONO_CTX
memset (&info->ctx, 0, sizeof (MonoContext));
info->ctx.edi = context.Edi;
info->ctx.esi = context.Esi;
info->ctx.ebx = context.Ebx;
info->ctx.edx = context.Edx;
info->ctx.ecx = context.Ecx;
info->ctx.eax = context.Eax;
info->ctx.ebp = context.Ebp;
info->ctx.esp = context.Esp;
#else
info->regs [0] = context.Edi;
info->regs [1] = context.Esi;
info->regs [2] = context.Ebx;
info->regs [3] = context.Edx;
info->regs [4] = context.Ecx;
info->regs [5] = context.Eax;
info->regs [6] = context.Ebp;
info->regs [7] = context.Esp;
#endif
/* Notify the JIT */
if (mono_gc_get_gc_callbacks ()->thread_suspend_func)
mono_gc_get_gc_callbacks ()->thread_suspend_func (info->runtime_data, NULL, NULL);
return TRUE;
}
void
sgen_wait_for_suspend_ack (int count)
{
/* Win32 suspend/resume is synchronous, so we don't need to wait for anything */
}
int
sgen_thread_handshake (BOOL suspend)
{
SgenThreadInfo *info;
SgenThreadInfo *current = mono_thread_info_current ();
int count = 0;
FOREACH_THREAD_SAFE (info) {
if (info->joined_stw == suspend)
continue;
info->joined_stw = suspend;
if (info == current)
continue;
if (info->gc_disabled)
continue;
if (suspend) {
g_assert (!info->doing_handshake);
info->doing_handshake = TRUE;
if (!sgen_suspend_thread (info))
continue;
} else {
g_assert (info->doing_handshake);
info->doing_handshake = FALSE;
if (!sgen_resume_thread (info))
continue;
}
++count;
} END_FOREACH_THREAD_SAFE
return count;
}
void
sgen_os_init (void)
{
}
int
mono_gc_get_suspend_signal (void)
{
return -1;
}
#endif
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