diff options
Diffstat (limited to 'boehm-gc/win32_threads.c')
| -rw-r--r-- | boehm-gc/win32_threads.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/boehm-gc/win32_threads.c b/boehm-gc/win32_threads.c deleted file mode 100644 index eb485bdc064..00000000000 --- a/boehm-gc/win32_threads.c +++ /dev/null @@ -1,168 +0,0 @@ -#ifdef WIN32_THREADS - -#include "gc_priv.h" - -#define STRICT -#include <windows.h> - -#define MAX_THREADS 64 - -struct thread_entry { - DWORD id; - HANDLE handle; - void *stack; /* The cold end of the stack. */ - CONTEXT context; -}; - -struct thread_entry thread_table[MAX_THREADS]; - -void GC_stop_world() -{ - DWORD thread_id = GetCurrentThreadId(); - int i; - for (i = 0; i < MAX_THREADS; i++) - if (thread_table[i].stack != 0 && thread_table[i].id != thread_id) { - if (SuspendThread(thread_table[i].handle) == (DWORD)-1) - ABORT("SuspendThread failed"); - } -} - -void GC_start_world() -{ - DWORD thread_id = GetCurrentThreadId(); - int i; - for (i = 0; i < MAX_THREADS; i++) - if (thread_table[i].stack != 0 && thread_table[i].id != thread_id) { - if (ResumeThread(thread_table[i].handle) == (DWORD)-1) - ABORT("ResumeThread failed"); - } -} - -ptr_t GC_current_stackbottom() -{ - DWORD thread_id = GetCurrentThreadId(); - int i; - for (i = 0; i < MAX_THREADS; i++) - if (thread_table[i].stack && thread_table[i].id == thread_id) - return thread_table[i].stack; - ABORT("no thread table entry for current thread"); -} - -ptr_t GC_get_lo_stack_addr(ptr_t s) -{ - ptr_t bottom; - MEMORY_BASIC_INFORMATION info; - VirtualQuery(s, &info, sizeof(info)); - do { - bottom = info.BaseAddress; - VirtualQuery(bottom - 1, &info, sizeof(info)); - } while ((info.Protect & PAGE_READWRITE) && !(info.Protect & PAGE_GUARD)); - return(bottom); -} - -void GC_push_all_stacks() -{ - DWORD thread_id = GetCurrentThreadId(); - int i; - for (i = 0; i < MAX_THREADS; i++) - if (thread_table[i].stack) { - ptr_t bottom = GC_get_lo_stack_addr(thread_table[i].stack); - if (thread_table[i].id == thread_id) - GC_push_all(&i, thread_table[i].stack); - else { - thread_table[i].context.ContextFlags - = (CONTEXT_INTEGER|CONTEXT_CONTROL); - if (!GetThreadContext(thread_table[i].handle, - &thread_table[i].context)) - ABORT("GetThreadContext failed"); - if (thread_table[i].context.Esp >= (DWORD)thread_table[i].stack - || thread_table[i].context.Esp < (DWORD)bottom) - ABORT("Thread stack pointer out of range"); - GC_push_all_stack(thread_table[i].context.Esp, thread_table[i].stack); - } - } -} - -void GC_get_next_stack(char *start, char **lo, char **hi) -{ - int i; -# define ADDR_LIMIT (char *)(-1L) - char * current_min = ADDR_LIMIT; - - for (i = 0; i < MAX_THREADS; i++) { - char * s = (char *)thread_table[i].stack; - - if (0 != s && s > start && s < current_min) { - current_min = s; - } - } - *hi = current_min; - if (current_min == ADDR_LIMIT) { - *lo = ADDR_LIMIT; - return; - } - *lo = GC_get_lo_stack_addr(current_min); - if (*lo < start) *lo = start; -} - -LONG WINAPI GC_write_fault_handler(struct _EXCEPTION_POINTERS *exc_info); - -/* - * This isn't generally safe, since DllMain is not premptible. - * If another thread holds the lock while this runs we're in trouble. - * Pontus Rydin suggests wrapping the thread start routine instead. - */ -BOOL WINAPI DllMain(HINSTANCE inst, ULONG reason, LPVOID reserved) -{ - switch (reason) { - case DLL_PROCESS_ATTACH: - InitializeCriticalSection(&GC_allocate_ml); - /* fall through */ - case DLL_THREAD_ATTACH: - { - int i; - LOCK(); - /* The following should be a noop according to the win32 */ - /* documentation. There is empirical evidence that it */ - /* isn't. - HB */ - if (GC_incremental) SetUnhandledExceptionFilter(GC_write_fault_handler); - for (i = 0; thread_table[i].stack != 0; i++) { - if (i == MAX_THREADS - 1) - ABORT("too many threads"); - } - thread_table[i].stack = GC_get_stack_base(); - thread_table[i].id = GetCurrentThreadId(); - if (!DuplicateHandle(GetCurrentProcess(), - GetCurrentThread(), - GetCurrentProcess(), - &thread_table[i].handle, - 0, - 0, - DUPLICATE_SAME_ACCESS)) { - DWORD last_error = GetLastError(); - GC_printf1("Last error code: %lx\n", last_error); - ABORT("DuplicateHandle failed"); - } - UNLOCK(); - } - break; - case DLL_PROCESS_DETACH: - case DLL_THREAD_DETACH: - { - int i; - DWORD thread_id = GetCurrentThreadId(); - LOCK(); - for (i = 0; thread_table[i].stack == 0 || thread_table[i].id != thread_id; i++) - if (i == MAX_THREADS - 1) - ABORT("thread not found on detach"); - thread_table[i].stack = 0; - CloseHandle(thread_table[i].handle); - BZERO(&thread_table[i].context, sizeof(CONTEXT)); - UNLOCK(); - } - break; - } - return TRUE; -} - -#endif /* WIN32_THREADS */ |