#include "private/gc_priv.h"
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#include "private/gc_priv.h"
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#if defined(GC_WIN32_THREADS)
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#if defined(GC_WIN32_THREADS)
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#include <windows.h>
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#include <windows.h>
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#ifdef CYGWIN32
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#ifdef CYGWIN32
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# include <errno.h>
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# include <errno.h>
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/* Cygwin-specific forward decls */
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/* Cygwin-specific forward decls */
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# undef pthread_create
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# undef pthread_create
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# undef pthread_sigmask
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# undef pthread_sigmask
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# undef pthread_join
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# undef pthread_join
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# undef pthread_detach
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# undef pthread_detach
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# undef dlopen
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# undef dlopen
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# define DEBUG_CYGWIN_THREADS 0
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# define DEBUG_CYGWIN_THREADS 0
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void * GC_start_routine(void * arg);
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void * GC_start_routine(void * arg);
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void GC_thread_exit_proc(void *arg);
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void GC_thread_exit_proc(void *arg);
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#endif
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#endif
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/* The type of the first argument to InterlockedExchange. */
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/* The type of the first argument to InterlockedExchange. */
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/* Documented to be LONG volatile *, but at least gcc likes */
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/* Documented to be LONG volatile *, but at least gcc likes */
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/* this better. */
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/* this better. */
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typedef LONG * IE_t;
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typedef LONG * IE_t;
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#ifndef MAX_THREADS
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#ifndef MAX_THREADS
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# define MAX_THREADS 256
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# define MAX_THREADS 256
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/* FIXME: */
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/* FIXME: */
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/* Things may get quite slow for large numbers of threads, */
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/* Things may get quite slow for large numbers of threads, */
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/* since we look them up with sequential search. */
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/* since we look them up with sequential search. */
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#endif
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#endif
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GC_bool GC_thr_initialized = FALSE;
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GC_bool GC_thr_initialized = FALSE;
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DWORD GC_main_thread = 0;
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DWORD GC_main_thread = 0;
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struct GC_thread_Rep {
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struct GC_thread_Rep {
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LONG in_use; /* Updated without lock. */
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LONG in_use; /* Updated without lock. */
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/* We assert that unused */
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/* We assert that unused */
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/* entries have invalid ids of */
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/* entries have invalid ids of */
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/* zero and zero stack fields. */
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/* zero and zero stack fields. */
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DWORD id;
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DWORD id;
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HANDLE handle;
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HANDLE handle;
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ptr_t stack_base; /* The cold end of the stack. */
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ptr_t stack_base; /* The cold end of the stack. */
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/* 0 ==> entry not valid. */
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/* 0 ==> entry not valid. */
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/* !in_use ==> stack_base == 0 */
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/* !in_use ==> stack_base == 0 */
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GC_bool suspended;
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GC_bool suspended;
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# ifdef CYGWIN32
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# ifdef CYGWIN32
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void *status; /* hold exit value until join in case it's a pointer */
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void *status; /* hold exit value until join in case it's a pointer */
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pthread_t pthread_id;
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pthread_t pthread_id;
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short flags; /* Protected by GC lock. */
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short flags; /* Protected by GC lock. */
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# define FINISHED 1 /* Thread has exited. */
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# define FINISHED 1 /* Thread has exited. */
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# define DETACHED 2 /* Thread is intended to be detached. */
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# define DETACHED 2 /* Thread is intended to be detached. */
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# endif
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# endif
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};
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};
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typedef volatile struct GC_thread_Rep * GC_thread;
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typedef volatile struct GC_thread_Rep * GC_thread;
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/*
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/*
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* We generally assume that volatile ==> memory ordering, at least among
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* We generally assume that volatile ==> memory ordering, at least among
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* volatiles.
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* volatiles.
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*/
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*/
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volatile GC_bool GC_please_stop = FALSE;
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volatile GC_bool GC_please_stop = FALSE;
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volatile struct GC_thread_Rep thread_table[MAX_THREADS];
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volatile struct GC_thread_Rep thread_table[MAX_THREADS];
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volatile LONG GC_max_thread_index = 0; /* Largest index in thread_table */
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volatile LONG GC_max_thread_index = 0; /* Largest index in thread_table */
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/* that was ever used. */
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/* that was ever used. */
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extern LONG WINAPI GC_write_fault_handler(struct _EXCEPTION_POINTERS *exc_info);
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extern LONG WINAPI GC_write_fault_handler(struct _EXCEPTION_POINTERS *exc_info);
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/*
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/*
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* This may be called from DllMain, and hence operates under unusual
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* This may be called from DllMain, and hence operates under unusual
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* constraints.
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* constraints.
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*/
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*/
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static GC_thread GC_new_thread(void) {
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static GC_thread GC_new_thread(void) {
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int i;
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int i;
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/* It appears to be unsafe to acquire a lock here, since this */
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/* It appears to be unsafe to acquire a lock here, since this */
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/* code is apparently not preeemptible on some systems. */
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/* code is apparently not preeemptible on some systems. */
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/* (This is based on complaints, not on Microsoft's official */
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/* (This is based on complaints, not on Microsoft's official */
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/* documentation, which says this should perform "only simple */
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/* documentation, which says this should perform "only simple */
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/* initialization tasks".) */
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/* initialization tasks".) */
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/* Hence we make do with nonblocking synchronization. */
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/* Hence we make do with nonblocking synchronization. */
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/* The following should be a noop according to the win32 */
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/* The following should be a noop according to the win32 */
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/* documentation. There is empirical evidence that it */
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/* documentation. There is empirical evidence that it */
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/* isn't. - HB */
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/* isn't. - HB */
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# if defined(MPROTECT_VDB)
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# if defined(MPROTECT_VDB)
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if (GC_incremental) SetUnhandledExceptionFilter(GC_write_fault_handler);
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if (GC_incremental) SetUnhandledExceptionFilter(GC_write_fault_handler);
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# endif
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# endif
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/* cast away volatile qualifier */
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/* cast away volatile qualifier */
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for (i = 0; InterlockedExchange((IE_t)&thread_table[i].in_use,1) != 0; i++) {
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for (i = 0; InterlockedExchange((IE_t)&thread_table[i].in_use,1) != 0; i++) {
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/* Compare-and-swap would make this cleaner, but that's not */
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/* Compare-and-swap would make this cleaner, but that's not */
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/* supported before Windows 98 and NT 4.0. In Windows 2000, */
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/* supported before Windows 98 and NT 4.0. In Windows 2000, */
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/* InterlockedExchange is supposed to be replaced by */
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/* InterlockedExchange is supposed to be replaced by */
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/* InterlockedExchangePointer, but that's not really what I */
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/* InterlockedExchangePointer, but that's not really what I */
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/* want here. */
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/* want here. */
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if (i == MAX_THREADS - 1)
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if (i == MAX_THREADS - 1)
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ABORT("too many threads");
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ABORT("too many threads");
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}
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}
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/* Update GC_max_thread_index if necessary. The following is safe, */
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/* Update GC_max_thread_index if necessary. The following is safe, */
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/* and unlike CompareExchange-based solutions seems to work on all */
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/* and unlike CompareExchange-based solutions seems to work on all */
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/* Windows95 and later platforms. */
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/* Windows95 and later platforms. */
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/* Unfortunately, GC_max_thread_index may be temporarily out of */
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/* Unfortunately, GC_max_thread_index may be temporarily out of */
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/* bounds, so readers have to compensate. */
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/* bounds, so readers have to compensate. */
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while (i > GC_max_thread_index) {
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while (i > GC_max_thread_index) {
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InterlockedIncrement((IE_t)&GC_max_thread_index);
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InterlockedIncrement((IE_t)&GC_max_thread_index);
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}
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}
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if (GC_max_thread_index >= MAX_THREADS) {
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if (GC_max_thread_index >= MAX_THREADS) {
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/* We overshot due to simultaneous increments. */
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/* We overshot due to simultaneous increments. */
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/* Setting it to MAX_THREADS-1 is always safe. */
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/* Setting it to MAX_THREADS-1 is always safe. */
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GC_max_thread_index = MAX_THREADS - 1;
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GC_max_thread_index = MAX_THREADS - 1;
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}
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}
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# ifdef CYGWIN32
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# ifdef CYGWIN32
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thread_table[i].pthread_id = pthread_self();
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thread_table[i].pthread_id = pthread_self();
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# endif
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# endif
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if (!DuplicateHandle(GetCurrentProcess(),
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if (!DuplicateHandle(GetCurrentProcess(),
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GetCurrentThread(),
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GetCurrentThread(),
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GetCurrentProcess(),
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GetCurrentProcess(),
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(HANDLE*)&thread_table[i].handle,
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(HANDLE*)&thread_table[i].handle,
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0,
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0,
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0,
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0,
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DUPLICATE_SAME_ACCESS)) {
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DUPLICATE_SAME_ACCESS)) {
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DWORD last_error = GetLastError();
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DWORD last_error = GetLastError();
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GC_printf1("Last error code: %lx\n", last_error);
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GC_printf1("Last error code: %lx\n", last_error);
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ABORT("DuplicateHandle failed");
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ABORT("DuplicateHandle failed");
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}
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}
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thread_table[i].stack_base = GC_get_stack_base();
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thread_table[i].stack_base = GC_get_stack_base();
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/* Up until this point, GC_push_all_stacks considers this thread */
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/* Up until this point, GC_push_all_stacks considers this thread */
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/* invalid. */
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/* invalid. */
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if (thread_table[i].stack_base == NULL)
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if (thread_table[i].stack_base == NULL)
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ABORT("Failed to find stack base in GC_new_thread");
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ABORT("Failed to find stack base in GC_new_thread");
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/* Up until this point, this entry is viewed as reserved but invalid */
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/* Up until this point, this entry is viewed as reserved but invalid */
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/* by GC_delete_thread. */
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/* by GC_delete_thread. */
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thread_table[i].id = GetCurrentThreadId();
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thread_table[i].id = GetCurrentThreadId();
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/* If this thread is being created while we are trying to stop */
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/* If this thread is being created while we are trying to stop */
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/* the world, wait here. Hopefully this can't happen on any */
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/* the world, wait here. Hopefully this can't happen on any */
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/* systems that don't allow us to block here. */
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/* systems that don't allow us to block here. */
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while (GC_please_stop) Sleep(20);
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while (GC_please_stop) Sleep(20);
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return thread_table + i;
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return thread_table + i;
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}
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}
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/*
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/*
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* GC_max_thread_index may temporarily be larger than MAX_THREADS.
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* GC_max_thread_index may temporarily be larger than MAX_THREADS.
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* To avoid subscript errors, we check on access.
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* To avoid subscript errors, we check on access.
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*/
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*/
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#ifdef __GNUC__
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#ifdef __GNUC__
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__inline__
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__inline__
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#endif
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#endif
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LONG GC_get_max_thread_index()
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LONG GC_get_max_thread_index()
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{
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{
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LONG my_max = GC_max_thread_index;
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LONG my_max = GC_max_thread_index;
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if (my_max >= MAX_THREADS) return MAX_THREADS-1;
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if (my_max >= MAX_THREADS) return MAX_THREADS-1;
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return my_max;
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return my_max;
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}
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}
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/* This is intended to be lock-free, though that */
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/* This is intended to be lock-free, though that */
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/* assumes that the CloseHandle becomes visible before the */
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/* assumes that the CloseHandle becomes visible before the */
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/* in_use assignment. */
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/* in_use assignment. */
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static void GC_delete_gc_thread(GC_thread thr)
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static void GC_delete_gc_thread(GC_thread thr)
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{
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{
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CloseHandle(thr->handle);
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CloseHandle(thr->handle);
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/* cast away volatile qualifier */
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/* cast away volatile qualifier */
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thr->stack_base = 0;
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thr->stack_base = 0;
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thr->id = 0;
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thr->id = 0;
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# ifdef CYGWIN32
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# ifdef CYGWIN32
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thr->pthread_id = 0;
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thr->pthread_id = 0;
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# endif /* CYGWIN32 */
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# endif /* CYGWIN32 */
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thr->in_use = FALSE;
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thr->in_use = FALSE;
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}
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}
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static void GC_delete_thread(DWORD thread_id) {
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static void GC_delete_thread(DWORD thread_id) {
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int i;
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int i;
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LONG my_max = GC_get_max_thread_index();
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LONG my_max = GC_get_max_thread_index();
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for (i = 0;
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for (i = 0;
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i <= my_max &&
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i <= my_max &&
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(!thread_table[i].in_use || thread_table[i].id != thread_id);
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(!thread_table[i].in_use || thread_table[i].id != thread_id);
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/* Must still be in_use, since nobody else can store our thread_id. */
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/* Must still be in_use, since nobody else can store our thread_id. */
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i++) {}
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i++) {}
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if (i > my_max) {
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if (i > my_max) {
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WARN("Removing nonexistent thread %ld\n", (GC_word)thread_id);
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WARN("Removing nonexistent thread %ld\n", (GC_word)thread_id);
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} else {
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} else {
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GC_delete_gc_thread(thread_table+i);
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GC_delete_gc_thread(thread_table+i);
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}
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}
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}
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}
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#ifdef CYGWIN32
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#ifdef CYGWIN32
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|
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/* Return a GC_thread corresponding to a given pthread_t. */
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/* Return a GC_thread corresponding to a given pthread_t. */
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/* Returns 0 if it's not there. */
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/* Returns 0 if it's not there. */
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/* We assume that this is only called for pthread ids that */
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/* We assume that this is only called for pthread ids that */
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/* have not yet terminated or are still joinable. */
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/* have not yet terminated or are still joinable. */
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static GC_thread GC_lookup_thread(pthread_t id)
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static GC_thread GC_lookup_thread(pthread_t id)
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{
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{
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int i;
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int i;
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LONG my_max = GC_get_max_thread_index();
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LONG my_max = GC_get_max_thread_index();
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|
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for (i = 0;
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for (i = 0;
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i <= my_max &&
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i <= my_max &&
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(!thread_table[i].in_use || thread_table[i].pthread_id != id
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(!thread_table[i].in_use || thread_table[i].pthread_id != id
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|| !thread_table[i].in_use);
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|| !thread_table[i].in_use);
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/* Must still be in_use, since nobody else can store our thread_id. */
|
/* Must still be in_use, since nobody else can store our thread_id. */
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i++);
|
i++);
|
if (i > my_max) return 0;
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if (i > my_max) return 0;
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return thread_table + i;
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return thread_table + i;
|
}
|
}
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|
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#endif /* CYGWIN32 */
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#endif /* CYGWIN32 */
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|
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void GC_push_thread_structures GC_PROTO((void))
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void GC_push_thread_structures GC_PROTO((void))
|
{
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{
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/* Unlike the other threads implementations, the thread table here */
|
/* Unlike the other threads implementations, the thread table here */
|
/* contains no pointers to the collectable heap. Thus we have */
|
/* contains no pointers to the collectable heap. Thus we have */
|
/* no private structures we need to preserve. */
|
/* no private structures we need to preserve. */
|
# ifdef CYGWIN32
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# ifdef CYGWIN32
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{ int i; /* pthreads may keep a pointer in the thread exit value */
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{ int i; /* pthreads may keep a pointer in the thread exit value */
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LONG my_max = GC_get_max_thread_index();
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LONG my_max = GC_get_max_thread_index();
|
|
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for (i = 0; i <= my_max; i++)
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for (i = 0; i <= my_max; i++)
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if (thread_table[i].in_use)
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if (thread_table[i].in_use)
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GC_push_all((ptr_t)&(thread_table[i].status),
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GC_push_all((ptr_t)&(thread_table[i].status),
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(ptr_t)(&(thread_table[i].status)+1));
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(ptr_t)(&(thread_table[i].status)+1));
|
}
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}
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# endif
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# endif
|
}
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}
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|
|
/* Defined in misc.c */
|
/* Defined in misc.c */
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extern CRITICAL_SECTION GC_write_cs;
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extern CRITICAL_SECTION GC_write_cs;
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|
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void GC_stop_world()
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void GC_stop_world()
|
{
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{
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DWORD thread_id = GetCurrentThreadId();
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DWORD thread_id = GetCurrentThreadId();
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int i;
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int i;
|
|
|
if (!GC_thr_initialized) ABORT("GC_stop_world() called before GC_thr_init()");
|
if (!GC_thr_initialized) ABORT("GC_stop_world() called before GC_thr_init()");
|
|
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GC_please_stop = TRUE;
|
GC_please_stop = TRUE;
|
# ifndef CYGWIN32
|
# ifndef CYGWIN32
|
EnterCriticalSection(&GC_write_cs);
|
EnterCriticalSection(&GC_write_cs);
|
# endif /* !CYGWIN32 */
|
# endif /* !CYGWIN32 */
|
for (i = 0; i <= GC_get_max_thread_index(); i++)
|
for (i = 0; i <= GC_get_max_thread_index(); i++)
|
if (thread_table[i].stack_base != 0
|
if (thread_table[i].stack_base != 0
|
&& thread_table[i].id != thread_id) {
|
&& thread_table[i].id != thread_id) {
|
# ifdef MSWINCE
|
# ifdef MSWINCE
|
/* SuspendThread will fail if thread is running kernel code */
|
/* SuspendThread will fail if thread is running kernel code */
|
while (SuspendThread(thread_table[i].handle) == (DWORD)-1)
|
while (SuspendThread(thread_table[i].handle) == (DWORD)-1)
|
Sleep(10);
|
Sleep(10);
|
# else
|
# else
|
/* Apparently the Windows 95 GetOpenFileName call creates */
|
/* Apparently the Windows 95 GetOpenFileName call creates */
|
/* a thread that does not properly get cleaned up, and */
|
/* a thread that does not properly get cleaned up, and */
|
/* SuspendThread on its descriptor may provoke a crash. */
|
/* SuspendThread on its descriptor may provoke a crash. */
|
/* This reduces the probability of that event, though it still */
|
/* This reduces the probability of that event, though it still */
|
/* appears there's a race here. */
|
/* appears there's a race here. */
|
DWORD exitCode;
|
DWORD exitCode;
|
if (GetExitCodeThread(thread_table[i].handle,&exitCode) &&
|
if (GetExitCodeThread(thread_table[i].handle,&exitCode) &&
|
exitCode != STILL_ACTIVE) {
|
exitCode != STILL_ACTIVE) {
|
thread_table[i].stack_base = 0; /* prevent stack from being pushed */
|
thread_table[i].stack_base = 0; /* prevent stack from being pushed */
|
# ifndef CYGWIN32
|
# ifndef CYGWIN32
|
/* this breaks pthread_join on Cygwin, which is guaranteed to */
|
/* this breaks pthread_join on Cygwin, which is guaranteed to */
|
/* only see user pthreads */
|
/* only see user pthreads */
|
thread_table[i].in_use = FALSE;
|
thread_table[i].in_use = FALSE;
|
CloseHandle(thread_table[i].handle);
|
CloseHandle(thread_table[i].handle);
|
# endif
|
# endif
|
continue;
|
continue;
|
}
|
}
|
if (SuspendThread(thread_table[i].handle) == (DWORD)-1)
|
if (SuspendThread(thread_table[i].handle) == (DWORD)-1)
|
ABORT("SuspendThread failed");
|
ABORT("SuspendThread failed");
|
# endif
|
# endif
|
thread_table[i].suspended = TRUE;
|
thread_table[i].suspended = TRUE;
|
}
|
}
|
# ifndef CYGWIN32
|
# ifndef CYGWIN32
|
LeaveCriticalSection(&GC_write_cs);
|
LeaveCriticalSection(&GC_write_cs);
|
# endif /* !CYGWIN32 */
|
# endif /* !CYGWIN32 */
|
}
|
}
|
|
|
void GC_start_world()
|
void GC_start_world()
|
{
|
{
|
DWORD thread_id = GetCurrentThreadId();
|
DWORD thread_id = GetCurrentThreadId();
|
int i;
|
int i;
|
LONG my_max = GC_get_max_thread_index();
|
LONG my_max = GC_get_max_thread_index();
|
|
|
for (i = 0; i <= my_max; i++)
|
for (i = 0; i <= my_max; i++)
|
if (thread_table[i].stack_base != 0 && thread_table[i].suspended
|
if (thread_table[i].stack_base != 0 && thread_table[i].suspended
|
&& thread_table[i].id != thread_id) {
|
&& thread_table[i].id != thread_id) {
|
if (ResumeThread(thread_table[i].handle) == (DWORD)-1)
|
if (ResumeThread(thread_table[i].handle) == (DWORD)-1)
|
ABORT("ResumeThread failed");
|
ABORT("ResumeThread failed");
|
thread_table[i].suspended = FALSE;
|
thread_table[i].suspended = FALSE;
|
}
|
}
|
GC_please_stop = FALSE;
|
GC_please_stop = FALSE;
|
}
|
}
|
|
|
# ifdef _MSC_VER
|
# ifdef _MSC_VER
|
# pragma warning(disable:4715)
|
# pragma warning(disable:4715)
|
# endif
|
# endif
|
ptr_t GC_current_stackbottom()
|
ptr_t GC_current_stackbottom()
|
{
|
{
|
DWORD thread_id = GetCurrentThreadId();
|
DWORD thread_id = GetCurrentThreadId();
|
int i;
|
int i;
|
LONG my_max = GC_get_max_thread_index();
|
LONG my_max = GC_get_max_thread_index();
|
|
|
for (i = 0; i <= my_max; i++)
|
for (i = 0; i <= my_max; i++)
|
if (thread_table[i].stack_base && thread_table[i].id == thread_id)
|
if (thread_table[i].stack_base && thread_table[i].id == thread_id)
|
return thread_table[i].stack_base;
|
return thread_table[i].stack_base;
|
ABORT("no thread table entry for current thread");
|
ABORT("no thread table entry for current thread");
|
}
|
}
|
# ifdef _MSC_VER
|
# ifdef _MSC_VER
|
# pragma warning(default:4715)
|
# pragma warning(default:4715)
|
# endif
|
# endif
|
|
|
# ifdef MSWINCE
|
# ifdef MSWINCE
|
/* The VirtualQuery calls below won't work properly on WinCE, but */
|
/* The VirtualQuery calls below won't work properly on WinCE, but */
|
/* since each stack is restricted to an aligned 64K region of */
|
/* since each stack is restricted to an aligned 64K region of */
|
/* virtual memory we can just take the next lowest multiple of 64K. */
|
/* virtual memory we can just take the next lowest multiple of 64K. */
|
# define GC_get_stack_min(s) \
|
# define GC_get_stack_min(s) \
|
((ptr_t)(((DWORD)(s) - 1) & 0xFFFF0000))
|
((ptr_t)(((DWORD)(s) - 1) & 0xFFFF0000))
|
# else
|
# else
|
static ptr_t GC_get_stack_min(ptr_t s)
|
static ptr_t GC_get_stack_min(ptr_t s)
|
{
|
{
|
ptr_t bottom;
|
ptr_t bottom;
|
MEMORY_BASIC_INFORMATION info;
|
MEMORY_BASIC_INFORMATION info;
|
VirtualQuery(s, &info, sizeof(info));
|
VirtualQuery(s, &info, sizeof(info));
|
do {
|
do {
|
bottom = info.BaseAddress;
|
bottom = info.BaseAddress;
|
VirtualQuery(bottom - 1, &info, sizeof(info));
|
VirtualQuery(bottom - 1, &info, sizeof(info));
|
} while ((info.Protect & PAGE_READWRITE)
|
} while ((info.Protect & PAGE_READWRITE)
|
&& !(info.Protect & PAGE_GUARD));
|
&& !(info.Protect & PAGE_GUARD));
|
return(bottom);
|
return(bottom);
|
}
|
}
|
# endif
|
# endif
|
|
|
void GC_push_all_stacks()
|
void GC_push_all_stacks()
|
{
|
{
|
DWORD thread_id = GetCurrentThreadId();
|
DWORD thread_id = GetCurrentThreadId();
|
GC_bool found_me = FALSE;
|
GC_bool found_me = FALSE;
|
int i;
|
int i;
|
int dummy;
|
int dummy;
|
ptr_t sp, stack_min;
|
ptr_t sp, stack_min;
|
GC_thread thread;
|
GC_thread thread;
|
LONG my_max = GC_get_max_thread_index();
|
LONG my_max = GC_get_max_thread_index();
|
|
|
for (i = 0; i <= my_max; i++) {
|
for (i = 0; i <= my_max; i++) {
|
thread = thread_table + i;
|
thread = thread_table + i;
|
if (thread -> in_use && thread -> stack_base) {
|
if (thread -> in_use && thread -> stack_base) {
|
if (thread -> id == thread_id) {
|
if (thread -> id == thread_id) {
|
sp = (ptr_t) &dummy;
|
sp = (ptr_t) &dummy;
|
found_me = TRUE;
|
found_me = TRUE;
|
} else {
|
} else {
|
CONTEXT context;
|
CONTEXT context;
|
context.ContextFlags = CONTEXT_INTEGER|CONTEXT_CONTROL;
|
context.ContextFlags = CONTEXT_INTEGER|CONTEXT_CONTROL;
|
if (!GetThreadContext(thread_table[i].handle, &context))
|
if (!GetThreadContext(thread_table[i].handle, &context))
|
ABORT("GetThreadContext failed");
|
ABORT("GetThreadContext failed");
|
|
|
/* Push all registers that might point into the heap. Frame */
|
/* Push all registers that might point into the heap. Frame */
|
/* pointer registers are included in case client code was */
|
/* pointer registers are included in case client code was */
|
/* compiled with the 'omit frame pointer' optimisation. */
|
/* compiled with the 'omit frame pointer' optimisation. */
|
# define PUSH1(reg) GC_push_one((word)context.reg)
|
# define PUSH1(reg) GC_push_one((word)context.reg)
|
# define PUSH2(r1,r2) PUSH1(r1), PUSH1(r2)
|
# define PUSH2(r1,r2) PUSH1(r1), PUSH1(r2)
|
# define PUSH4(r1,r2,r3,r4) PUSH2(r1,r2), PUSH2(r3,r4)
|
# define PUSH4(r1,r2,r3,r4) PUSH2(r1,r2), PUSH2(r3,r4)
|
# if defined(I386)
|
# if defined(I386)
|
PUSH4(Edi,Esi,Ebx,Edx), PUSH2(Ecx,Eax), PUSH1(Ebp);
|
PUSH4(Edi,Esi,Ebx,Edx), PUSH2(Ecx,Eax), PUSH1(Ebp);
|
sp = (ptr_t)context.Esp;
|
sp = (ptr_t)context.Esp;
|
# elif defined(ARM32)
|
# elif defined(ARM32)
|
PUSH4(R0,R1,R2,R3),PUSH4(R4,R5,R6,R7),PUSH4(R8,R9,R10,R11),PUSH1(R12);
|
PUSH4(R0,R1,R2,R3),PUSH4(R4,R5,R6,R7),PUSH4(R8,R9,R10,R11),PUSH1(R12);
|
sp = (ptr_t)context.Sp;
|
sp = (ptr_t)context.Sp;
|
# elif defined(SHx)
|
# elif defined(SHx)
|
PUSH4(R0,R1,R2,R3), PUSH4(R4,R5,R6,R7), PUSH4(R8,R9,R10,R11);
|
PUSH4(R0,R1,R2,R3), PUSH4(R4,R5,R6,R7), PUSH4(R8,R9,R10,R11);
|
PUSH2(R12,R13), PUSH1(R14);
|
PUSH2(R12,R13), PUSH1(R14);
|
sp = (ptr_t)context.R15;
|
sp = (ptr_t)context.R15;
|
# elif defined(MIPS)
|
# elif defined(MIPS)
|
PUSH4(IntAt,IntV0,IntV1,IntA0), PUSH4(IntA1,IntA2,IntA3,IntT0);
|
PUSH4(IntAt,IntV0,IntV1,IntA0), PUSH4(IntA1,IntA2,IntA3,IntT0);
|
PUSH4(IntT1,IntT2,IntT3,IntT4), PUSH4(IntT5,IntT6,IntT7,IntS0);
|
PUSH4(IntT1,IntT2,IntT3,IntT4), PUSH4(IntT5,IntT6,IntT7,IntS0);
|
PUSH4(IntS1,IntS2,IntS3,IntS4), PUSH4(IntS5,IntS6,IntS7,IntT8);
|
PUSH4(IntS1,IntS2,IntS3,IntS4), PUSH4(IntS5,IntS6,IntS7,IntT8);
|
PUSH4(IntT9,IntK0,IntK1,IntS8);
|
PUSH4(IntT9,IntK0,IntK1,IntS8);
|
sp = (ptr_t)context.IntSp;
|
sp = (ptr_t)context.IntSp;
|
# elif defined(PPC)
|
# elif defined(PPC)
|
PUSH4(Gpr0, Gpr3, Gpr4, Gpr5), PUSH4(Gpr6, Gpr7, Gpr8, Gpr9);
|
PUSH4(Gpr0, Gpr3, Gpr4, Gpr5), PUSH4(Gpr6, Gpr7, Gpr8, Gpr9);
|
PUSH4(Gpr10,Gpr11,Gpr12,Gpr14), PUSH4(Gpr15,Gpr16,Gpr17,Gpr18);
|
PUSH4(Gpr10,Gpr11,Gpr12,Gpr14), PUSH4(Gpr15,Gpr16,Gpr17,Gpr18);
|
PUSH4(Gpr19,Gpr20,Gpr21,Gpr22), PUSH4(Gpr23,Gpr24,Gpr25,Gpr26);
|
PUSH4(Gpr19,Gpr20,Gpr21,Gpr22), PUSH4(Gpr23,Gpr24,Gpr25,Gpr26);
|
PUSH4(Gpr27,Gpr28,Gpr29,Gpr30), PUSH1(Gpr31);
|
PUSH4(Gpr27,Gpr28,Gpr29,Gpr30), PUSH1(Gpr31);
|
sp = (ptr_t)context.Gpr1;
|
sp = (ptr_t)context.Gpr1;
|
# elif defined(ALPHA)
|
# elif defined(ALPHA)
|
PUSH4(IntV0,IntT0,IntT1,IntT2), PUSH4(IntT3,IntT4,IntT5,IntT6);
|
PUSH4(IntV0,IntT0,IntT1,IntT2), PUSH4(IntT3,IntT4,IntT5,IntT6);
|
PUSH4(IntT7,IntS0,IntS1,IntS2), PUSH4(IntS3,IntS4,IntS5,IntFp);
|
PUSH4(IntT7,IntS0,IntS1,IntS2), PUSH4(IntS3,IntS4,IntS5,IntFp);
|
PUSH4(IntA0,IntA1,IntA2,IntA3), PUSH4(IntA4,IntA5,IntT8,IntT9);
|
PUSH4(IntA0,IntA1,IntA2,IntA3), PUSH4(IntA4,IntA5,IntT8,IntT9);
|
PUSH4(IntT10,IntT11,IntT12,IntAt);
|
PUSH4(IntT10,IntT11,IntT12,IntAt);
|
sp = (ptr_t)context.IntSp;
|
sp = (ptr_t)context.IntSp;
|
# else
|
# else
|
# error "architecture is not supported"
|
# error "architecture is not supported"
|
# endif
|
# endif
|
}
|
}
|
|
|
stack_min = GC_get_stack_min(thread->stack_base);
|
stack_min = GC_get_stack_min(thread->stack_base);
|
|
|
if (sp >= stack_min && sp < thread->stack_base)
|
if (sp >= stack_min && sp < thread->stack_base)
|
GC_push_all_stack(sp, thread->stack_base);
|
GC_push_all_stack(sp, thread->stack_base);
|
else {
|
else {
|
WARN("Thread stack pointer 0x%lx out of range, pushing everything\n",
|
WARN("Thread stack pointer 0x%lx out of range, pushing everything\n",
|
(unsigned long)sp);
|
(unsigned long)sp);
|
GC_push_all_stack(stack_min, thread->stack_base);
|
GC_push_all_stack(stack_min, thread->stack_base);
|
}
|
}
|
}
|
}
|
}
|
}
|
if (!found_me) ABORT("Collecting from unknown thread.");
|
if (!found_me) ABORT("Collecting from unknown thread.");
|
}
|
}
|
|
|
void GC_get_next_stack(char *start, char **lo, char **hi)
|
void GC_get_next_stack(char *start, char **lo, char **hi)
|
{
|
{
|
int i;
|
int i;
|
# define ADDR_LIMIT (char *)(-1L)
|
# define ADDR_LIMIT (char *)(-1L)
|
char * current_min = ADDR_LIMIT;
|
char * current_min = ADDR_LIMIT;
|
LONG my_max = GC_get_max_thread_index();
|
LONG my_max = GC_get_max_thread_index();
|
|
|
for (i = 0; i <= my_max; i++) {
|
for (i = 0; i <= my_max; i++) {
|
char * s = (char *)thread_table[i].stack_base;
|
char * s = (char *)thread_table[i].stack_base;
|
|
|
if (0 != s && s > start && s < current_min) {
|
if (0 != s && s > start && s < current_min) {
|
current_min = s;
|
current_min = s;
|
}
|
}
|
}
|
}
|
*hi = current_min;
|
*hi = current_min;
|
if (current_min == ADDR_LIMIT) {
|
if (current_min == ADDR_LIMIT) {
|
*lo = ADDR_LIMIT;
|
*lo = ADDR_LIMIT;
|
return;
|
return;
|
}
|
}
|
*lo = GC_get_stack_min(current_min);
|
*lo = GC_get_stack_min(current_min);
|
if (*lo < start) *lo = start;
|
if (*lo < start) *lo = start;
|
}
|
}
|
|
|
#if !defined(CYGWIN32)
|
#if !defined(CYGWIN32)
|
|
|
#if !defined(MSWINCE) && defined(GC_DLL)
|
#if !defined(MSWINCE) && defined(GC_DLL)
|
|
|
/* We register threads from DllMain */
|
/* We register threads from DllMain */
|
|
|
GC_API HANDLE WINAPI GC_CreateThread(
|
GC_API HANDLE WINAPI GC_CreateThread(
|
LPSECURITY_ATTRIBUTES lpThreadAttributes,
|
LPSECURITY_ATTRIBUTES lpThreadAttributes,
|
DWORD dwStackSize, LPTHREAD_START_ROUTINE lpStartAddress,
|
DWORD dwStackSize, LPTHREAD_START_ROUTINE lpStartAddress,
|
LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId )
|
LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId )
|
{
|
{
|
return CreateThread(lpThreadAttributes, dwStackSize, lpStartAddress,
|
return CreateThread(lpThreadAttributes, dwStackSize, lpStartAddress,
|
lpParameter, dwCreationFlags, lpThreadId);
|
lpParameter, dwCreationFlags, lpThreadId);
|
}
|
}
|
|
|
#else /* defined(MSWINCE) || !defined(GC_DLL)) */
|
#else /* defined(MSWINCE) || !defined(GC_DLL)) */
|
|
|
/* We have no DllMain to take care of new threads. Thus we */
|
/* We have no DllMain to take care of new threads. Thus we */
|
/* must properly intercept thread creation. */
|
/* must properly intercept thread creation. */
|
|
|
typedef struct {
|
typedef struct {
|
LPTHREAD_START_ROUTINE start;
|
LPTHREAD_START_ROUTINE start;
|
LPVOID param;
|
LPVOID param;
|
} thread_args;
|
} thread_args;
|
|
|
static DWORD WINAPI thread_start(LPVOID arg);
|
static DWORD WINAPI thread_start(LPVOID arg);
|
|
|
GC_API HANDLE WINAPI GC_CreateThread(
|
GC_API HANDLE WINAPI GC_CreateThread(
|
LPSECURITY_ATTRIBUTES lpThreadAttributes,
|
LPSECURITY_ATTRIBUTES lpThreadAttributes,
|
DWORD dwStackSize, LPTHREAD_START_ROUTINE lpStartAddress,
|
DWORD dwStackSize, LPTHREAD_START_ROUTINE lpStartAddress,
|
LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId )
|
LPVOID lpParameter, DWORD dwCreationFlags, LPDWORD lpThreadId )
|
{
|
{
|
HANDLE thread_h = NULL;
|
HANDLE thread_h = NULL;
|
|
|
thread_args *args;
|
thread_args *args;
|
|
|
if (!GC_is_initialized) GC_init();
|
if (!GC_is_initialized) GC_init();
|
/* make sure GC is initialized (i.e. main thread is attached) */
|
/* make sure GC is initialized (i.e. main thread is attached) */
|
|
|
args = GC_malloc_uncollectable(sizeof(thread_args));
|
args = GC_malloc_uncollectable(sizeof(thread_args));
|
/* Handed off to and deallocated by child thread. */
|
/* Handed off to and deallocated by child thread. */
|
if (0 == args) {
|
if (0 == args) {
|
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
|
SetLastError(ERROR_NOT_ENOUGH_MEMORY);
|
return NULL;
|
return NULL;
|
}
|
}
|
|
|
/* set up thread arguments */
|
/* set up thread arguments */
|
args -> start = lpStartAddress;
|
args -> start = lpStartAddress;
|
args -> param = lpParameter;
|
args -> param = lpParameter;
|
|
|
thread_h = CreateThread(lpThreadAttributes,
|
thread_h = CreateThread(lpThreadAttributes,
|
dwStackSize, thread_start,
|
dwStackSize, thread_start,
|
args, dwCreationFlags,
|
args, dwCreationFlags,
|
lpThreadId);
|
lpThreadId);
|
|
|
return thread_h;
|
return thread_h;
|
}
|
}
|
|
|
static DWORD WINAPI thread_start(LPVOID arg)
|
static DWORD WINAPI thread_start(LPVOID arg)
|
{
|
{
|
DWORD ret = 0;
|
DWORD ret = 0;
|
thread_args *args = (thread_args *)arg;
|
thread_args *args = (thread_args *)arg;
|
|
|
GC_new_thread();
|
GC_new_thread();
|
|
|
/* Clear the thread entry even if we exit with an exception. */
|
/* Clear the thread entry even if we exit with an exception. */
|
/* This is probably pointless, since an uncaught exception is */
|
/* This is probably pointless, since an uncaught exception is */
|
/* supposed to result in the process being killed. */
|
/* supposed to result in the process being killed. */
|
#ifndef __GNUC__
|
#ifndef __GNUC__
|
__try {
|
__try {
|
#endif /* __GNUC__ */
|
#endif /* __GNUC__ */
|
ret = args->start (args->param);
|
ret = args->start (args->param);
|
#ifndef __GNUC__
|
#ifndef __GNUC__
|
} __finally {
|
} __finally {
|
#endif /* __GNUC__ */
|
#endif /* __GNUC__ */
|
GC_free(args);
|
GC_free(args);
|
GC_delete_thread(GetCurrentThreadId());
|
GC_delete_thread(GetCurrentThreadId());
|
#ifndef __GNUC__
|
#ifndef __GNUC__
|
}
|
}
|
#endif /* __GNUC__ */
|
#endif /* __GNUC__ */
|
|
|
return ret;
|
return ret;
|
}
|
}
|
#endif /* !defined(MSWINCE) && !(defined(__MINGW32__) && !defined(_DLL)) */
|
#endif /* !defined(MSWINCE) && !(defined(__MINGW32__) && !defined(_DLL)) */
|
|
|
#endif /* !CYGWIN32 */
|
#endif /* !CYGWIN32 */
|
|
|
#ifdef MSWINCE
|
#ifdef MSWINCE
|
|
|
typedef struct {
|
typedef struct {
|
HINSTANCE hInstance;
|
HINSTANCE hInstance;
|
HINSTANCE hPrevInstance;
|
HINSTANCE hPrevInstance;
|
LPWSTR lpCmdLine;
|
LPWSTR lpCmdLine;
|
int nShowCmd;
|
int nShowCmd;
|
} main_thread_args;
|
} main_thread_args;
|
|
|
DWORD WINAPI main_thread_start(LPVOID arg);
|
DWORD WINAPI main_thread_start(LPVOID arg);
|
|
|
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
|
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
|
LPWSTR lpCmdLine, int nShowCmd)
|
LPWSTR lpCmdLine, int nShowCmd)
|
{
|
{
|
DWORD exit_code = 1;
|
DWORD exit_code = 1;
|
|
|
main_thread_args args = {
|
main_thread_args args = {
|
hInstance, hPrevInstance, lpCmdLine, nShowCmd
|
hInstance, hPrevInstance, lpCmdLine, nShowCmd
|
};
|
};
|
HANDLE thread_h;
|
HANDLE thread_h;
|
DWORD thread_id;
|
DWORD thread_id;
|
|
|
/* initialize everything */
|
/* initialize everything */
|
GC_init();
|
GC_init();
|
|
|
/* start the main thread */
|
/* start the main thread */
|
thread_h = GC_CreateThread(
|
thread_h = GC_CreateThread(
|
NULL, 0, main_thread_start, &args, 0, &thread_id);
|
NULL, 0, main_thread_start, &args, 0, &thread_id);
|
|
|
if (thread_h != NULL)
|
if (thread_h != NULL)
|
{
|
{
|
WaitForSingleObject (thread_h, INFINITE);
|
WaitForSingleObject (thread_h, INFINITE);
|
GetExitCodeThread (thread_h, &exit_code);
|
GetExitCodeThread (thread_h, &exit_code);
|
CloseHandle (thread_h);
|
CloseHandle (thread_h);
|
}
|
}
|
|
|
GC_deinit();
|
GC_deinit();
|
DeleteCriticalSection(&GC_allocate_ml);
|
DeleteCriticalSection(&GC_allocate_ml);
|
|
|
return (int) exit_code;
|
return (int) exit_code;
|
}
|
}
|
|
|
DWORD WINAPI main_thread_start(LPVOID arg)
|
DWORD WINAPI main_thread_start(LPVOID arg)
|
{
|
{
|
main_thread_args * args = (main_thread_args *) arg;
|
main_thread_args * args = (main_thread_args *) arg;
|
|
|
return (DWORD) GC_WinMain (args->hInstance, args->hPrevInstance,
|
return (DWORD) GC_WinMain (args->hInstance, args->hPrevInstance,
|
args->lpCmdLine, args->nShowCmd);
|
args->lpCmdLine, args->nShowCmd);
|
}
|
}
|
|
|
# else /* !MSWINCE */
|
# else /* !MSWINCE */
|
|
|
/* Called by GC_init() - we hold the allocation lock. */
|
/* Called by GC_init() - we hold the allocation lock. */
|
void GC_thr_init() {
|
void GC_thr_init() {
|
if (GC_thr_initialized) return;
|
if (GC_thr_initialized) return;
|
GC_main_thread = GetCurrentThreadId();
|
GC_main_thread = GetCurrentThreadId();
|
GC_thr_initialized = TRUE;
|
GC_thr_initialized = TRUE;
|
|
|
/* Add the initial thread, so we can stop it. */
|
/* Add the initial thread, so we can stop it. */
|
GC_new_thread();
|
GC_new_thread();
|
}
|
}
|
|
|
#ifdef CYGWIN32
|
#ifdef CYGWIN32
|
|
|
struct start_info {
|
struct start_info {
|
void *(*start_routine)(void *);
|
void *(*start_routine)(void *);
|
void *arg;
|
void *arg;
|
GC_bool detached;
|
GC_bool detached;
|
};
|
};
|
|
|
int GC_pthread_join(pthread_t pthread_id, void **retval) {
|
int GC_pthread_join(pthread_t pthread_id, void **retval) {
|
int result;
|
int result;
|
int i;
|
int i;
|
GC_thread me;
|
GC_thread me;
|
|
|
# if DEBUG_CYGWIN_THREADS
|
# if DEBUG_CYGWIN_THREADS
|
GC_printf3("thread 0x%x(0x%x) is joining thread 0x%x.\n",
|
GC_printf3("thread 0x%x(0x%x) is joining thread 0x%x.\n",
|
(int)pthread_self(), GetCurrentThreadId(), (int)pthread_id);
|
(int)pthread_self(), GetCurrentThreadId(), (int)pthread_id);
|
# endif
|
# endif
|
|
|
/* Thread being joined might not have registered itself yet. */
|
/* Thread being joined might not have registered itself yet. */
|
/* After the join,thread id may have been recycled. */
|
/* After the join,thread id may have been recycled. */
|
/* FIXME: It would be better if this worked more like */
|
/* FIXME: It would be better if this worked more like */
|
/* pthread_support.c. */
|
/* pthread_support.c. */
|
|
|
while ((me = GC_lookup_thread(pthread_id)) == 0) Sleep(10);
|
while ((me = GC_lookup_thread(pthread_id)) == 0) Sleep(10);
|
|
|
result = pthread_join(pthread_id, retval);
|
result = pthread_join(pthread_id, retval);
|
|
|
GC_delete_gc_thread(me);
|
GC_delete_gc_thread(me);
|
|
|
# if DEBUG_CYGWIN_THREADS
|
# if DEBUG_CYGWIN_THREADS
|
GC_printf3("thread 0x%x(0x%x) completed join with thread 0x%x.\n",
|
GC_printf3("thread 0x%x(0x%x) completed join with thread 0x%x.\n",
|
(int)pthread_self(), GetCurrentThreadId(), (int)pthread_id);
|
(int)pthread_self(), GetCurrentThreadId(), (int)pthread_id);
|
# endif
|
# endif
|
|
|
return result;
|
return result;
|
}
|
}
|
|
|
/* Cygwin-pthreads calls CreateThread internally, but it's not
|
/* Cygwin-pthreads calls CreateThread internally, but it's not
|
* easily interceptible by us..
|
* easily interceptible by us..
|
* so intercept pthread_create instead
|
* so intercept pthread_create instead
|
*/
|
*/
|
int
|
int
|
GC_pthread_create(pthread_t *new_thread,
|
GC_pthread_create(pthread_t *new_thread,
|
const pthread_attr_t *attr,
|
const pthread_attr_t *attr,
|
void *(*start_routine)(void *), void *arg) {
|
void *(*start_routine)(void *), void *arg) {
|
int result;
|
int result;
|
struct start_info * si;
|
struct start_info * si;
|
|
|
if (!GC_is_initialized) GC_init();
|
if (!GC_is_initialized) GC_init();
|
/* make sure GC is initialized (i.e. main thread is attached) */
|
/* make sure GC is initialized (i.e. main thread is attached) */
|
|
|
/* This is otherwise saved only in an area mmapped by the thread */
|
/* This is otherwise saved only in an area mmapped by the thread */
|
/* library, which isn't visible to the collector. */
|
/* library, which isn't visible to the collector. */
|
si = GC_malloc_uncollectable(sizeof(struct start_info));
|
si = GC_malloc_uncollectable(sizeof(struct start_info));
|
if (0 == si) return(EAGAIN);
|
if (0 == si) return(EAGAIN);
|
|
|
si -> start_routine = start_routine;
|
si -> start_routine = start_routine;
|
si -> arg = arg;
|
si -> arg = arg;
|
if (attr != 0 &&
|
if (attr != 0 &&
|
pthread_attr_getdetachstate(attr, &si->detached)
|
pthread_attr_getdetachstate(attr, &si->detached)
|
== PTHREAD_CREATE_DETACHED) {
|
== PTHREAD_CREATE_DETACHED) {
|
si->detached = TRUE;
|
si->detached = TRUE;
|
}
|
}
|
|
|
# if DEBUG_CYGWIN_THREADS
|
# if DEBUG_CYGWIN_THREADS
|
GC_printf2("About to create a thread from 0x%x(0x%x)\n",
|
GC_printf2("About to create a thread from 0x%x(0x%x)\n",
|
(int)pthread_self(), GetCurrentThreadId);
|
(int)pthread_self(), GetCurrentThreadId);
|
# endif
|
# endif
|
result = pthread_create(new_thread, attr, GC_start_routine, si);
|
result = pthread_create(new_thread, attr, GC_start_routine, si);
|
|
|
if (result) { /* failure */
|
if (result) { /* failure */
|
GC_free(si);
|
GC_free(si);
|
}
|
}
|
|
|
return(result);
|
return(result);
|
}
|
}
|
|
|
void * GC_start_routine(void * arg)
|
void * GC_start_routine(void * arg)
|
{
|
{
|
struct start_info * si = arg;
|
struct start_info * si = arg;
|
void * result;
|
void * result;
|
void *(*start)(void *);
|
void *(*start)(void *);
|
void *start_arg;
|
void *start_arg;
|
pthread_t pthread_id;
|
pthread_t pthread_id;
|
GC_thread me;
|
GC_thread me;
|
GC_bool detached;
|
GC_bool detached;
|
int i;
|
int i;
|
|
|
# if DEBUG_CYGWIN_THREADS
|
# if DEBUG_CYGWIN_THREADS
|
GC_printf2("thread 0x%x(0x%x) starting...\n",(int)pthread_self(),
|
GC_printf2("thread 0x%x(0x%x) starting...\n",(int)pthread_self(),
|
GetCurrentThreadId());
|
GetCurrentThreadId());
|
# endif
|
# endif
|
|
|
/* If a GC occurs before the thread is registered, that GC will */
|
/* If a GC occurs before the thread is registered, that GC will */
|
/* ignore this thread. That's fine, since it will block trying to */
|
/* ignore this thread. That's fine, since it will block trying to */
|
/* acquire the allocation lock, and won't yet hold interesting */
|
/* acquire the allocation lock, and won't yet hold interesting */
|
/* pointers. */
|
/* pointers. */
|
LOCK();
|
LOCK();
|
/* We register the thread here instead of in the parent, so that */
|
/* We register the thread here instead of in the parent, so that */
|
/* we don't need to hold the allocation lock during pthread_create. */
|
/* we don't need to hold the allocation lock during pthread_create. */
|
me = GC_new_thread();
|
me = GC_new_thread();
|
UNLOCK();
|
UNLOCK();
|
|
|
start = si -> start_routine;
|
start = si -> start_routine;
|
start_arg = si -> arg;
|
start_arg = si -> arg;
|
if (si-> detached) me -> flags |= DETACHED;
|
if (si-> detached) me -> flags |= DETACHED;
|
me -> pthread_id = pthread_id = pthread_self();
|
me -> pthread_id = pthread_id = pthread_self();
|
|
|
GC_free(si); /* was allocated uncollectable */
|
GC_free(si); /* was allocated uncollectable */
|
|
|
pthread_cleanup_push(GC_thread_exit_proc, (void *)me);
|
pthread_cleanup_push(GC_thread_exit_proc, (void *)me);
|
result = (*start)(start_arg);
|
result = (*start)(start_arg);
|
me -> status = result;
|
me -> status = result;
|
pthread_cleanup_pop(0);
|
pthread_cleanup_pop(0);
|
|
|
# if DEBUG_CYGWIN_THREADS
|
# if DEBUG_CYGWIN_THREADS
|
GC_printf2("thread 0x%x(0x%x) returned from start routine.\n",
|
GC_printf2("thread 0x%x(0x%x) returned from start routine.\n",
|
(int)pthread_self(),GetCurrentThreadId());
|
(int)pthread_self(),GetCurrentThreadId());
|
# endif
|
# endif
|
|
|
return(result);
|
return(result);
|
}
|
}
|
|
|
void GC_thread_exit_proc(void *arg)
|
void GC_thread_exit_proc(void *arg)
|
{
|
{
|
GC_thread me = (GC_thread)arg;
|
GC_thread me = (GC_thread)arg;
|
int i;
|
int i;
|
|
|
# if DEBUG_CYGWIN_THREADS
|
# if DEBUG_CYGWIN_THREADS
|
GC_printf2("thread 0x%x(0x%x) called pthread_exit().\n",
|
GC_printf2("thread 0x%x(0x%x) called pthread_exit().\n",
|
(int)pthread_self(),GetCurrentThreadId());
|
(int)pthread_self(),GetCurrentThreadId());
|
# endif
|
# endif
|
|
|
LOCK();
|
LOCK();
|
if (me -> flags & DETACHED) {
|
if (me -> flags & DETACHED) {
|
GC_delete_thread(GetCurrentThreadId());
|
GC_delete_thread(GetCurrentThreadId());
|
} else {
|
} else {
|
/* deallocate it as part of join */
|
/* deallocate it as part of join */
|
me -> flags |= FINISHED;
|
me -> flags |= FINISHED;
|
}
|
}
|
UNLOCK();
|
UNLOCK();
|
}
|
}
|
|
|
/* nothing required here... */
|
/* nothing required here... */
|
int GC_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset) {
|
int GC_pthread_sigmask(int how, const sigset_t *set, sigset_t *oset) {
|
return pthread_sigmask(how, set, oset);
|
return pthread_sigmask(how, set, oset);
|
}
|
}
|
|
|
int GC_pthread_detach(pthread_t thread)
|
int GC_pthread_detach(pthread_t thread)
|
{
|
{
|
int result;
|
int result;
|
GC_thread thread_gc_id;
|
GC_thread thread_gc_id;
|
|
|
LOCK();
|
LOCK();
|
thread_gc_id = GC_lookup_thread(thread);
|
thread_gc_id = GC_lookup_thread(thread);
|
UNLOCK();
|
UNLOCK();
|
result = pthread_detach(thread);
|
result = pthread_detach(thread);
|
if (result == 0) {
|
if (result == 0) {
|
LOCK();
|
LOCK();
|
thread_gc_id -> flags |= DETACHED;
|
thread_gc_id -> flags |= DETACHED;
|
/* Here the pthread thread id may have been recycled. */
|
/* Here the pthread thread id may have been recycled. */
|
if (thread_gc_id -> flags & FINISHED) {
|
if (thread_gc_id -> flags & FINISHED) {
|
GC_delete_gc_thread(thread_gc_id);
|
GC_delete_gc_thread(thread_gc_id);
|
}
|
}
|
UNLOCK();
|
UNLOCK();
|
}
|
}
|
return result;
|
return result;
|
}
|
}
|
|
|
GC_PTR GC_get_thread_stack_base()
|
GC_PTR GC_get_thread_stack_base()
|
{
|
{
|
extern GC_PTR _tlsbase __asm__ ("%fs:4");
|
extern GC_PTR _tlsbase __asm__ ("%fs:4");
|
return _tlsbase;
|
return _tlsbase;
|
}
|
}
|
|
|
#else /* !CYGWIN32 */
|
#else /* !CYGWIN32 */
|
|
|
/*
|
/*
|
* We avoid acquiring locks here, since this doesn't seem to be preemptable.
|
* We avoid acquiring locks here, since this doesn't seem to be preemptable.
|
* Pontus Rydin suggests wrapping the thread start routine instead.
|
* Pontus Rydin suggests wrapping the thread start routine instead.
|
*/
|
*/
|
#ifdef GC_DLL
|
#ifdef GC_DLL
|
BOOL WINAPI DllMain(HINSTANCE inst, ULONG reason, LPVOID reserved)
|
BOOL WINAPI DllMain(HINSTANCE inst, ULONG reason, LPVOID reserved)
|
{
|
{
|
switch (reason) {
|
switch (reason) {
|
case DLL_PROCESS_ATTACH:
|
case DLL_PROCESS_ATTACH:
|
GC_init(); /* Force initialization before thread attach. */
|
GC_init(); /* Force initialization before thread attach. */
|
/* fall through */
|
/* fall through */
|
case DLL_THREAD_ATTACH:
|
case DLL_THREAD_ATTACH:
|
GC_ASSERT(GC_thr_initialized);
|
GC_ASSERT(GC_thr_initialized);
|
if (GC_main_thread != GetCurrentThreadId()) {
|
if (GC_main_thread != GetCurrentThreadId()) {
|
GC_new_thread();
|
GC_new_thread();
|
} /* o.w. we already did it during GC_thr_init(), called by GC_init() */
|
} /* o.w. we already did it during GC_thr_init(), called by GC_init() */
|
break;
|
break;
|
|
|
case DLL_THREAD_DETACH:
|
case DLL_THREAD_DETACH:
|
GC_delete_thread(GetCurrentThreadId());
|
GC_delete_thread(GetCurrentThreadId());
|
break;
|
break;
|
|
|
case DLL_PROCESS_DETACH:
|
case DLL_PROCESS_DETACH:
|
{
|
{
|
int i;
|
int i;
|
|
|
LOCK();
|
LOCK();
|
for (i = 0; i <= GC_get_max_thread_index(); ++i)
|
for (i = 0; i <= GC_get_max_thread_index(); ++i)
|
{
|
{
|
if (thread_table[i].in_use)
|
if (thread_table[i].in_use)
|
GC_delete_gc_thread(thread_table + i);
|
GC_delete_gc_thread(thread_table + i);
|
}
|
}
|
UNLOCK();
|
UNLOCK();
|
|
|
GC_deinit();
|
GC_deinit();
|
DeleteCriticalSection(&GC_allocate_ml);
|
DeleteCriticalSection(&GC_allocate_ml);
|
}
|
}
|
break;
|
break;
|
|
|
}
|
}
|
return TRUE;
|
return TRUE;
|
}
|
}
|
#endif /* GC_DLL */
|
#endif /* GC_DLL */
|
#endif /* !CYGWIN32 */
|
#endif /* !CYGWIN32 */
|
|
|
# endif /* !MSWINCE */
|
# endif /* !MSWINCE */
|
|
|
#endif /* GC_WIN32_THREADS */
|
#endif /* GC_WIN32_THREADS */
|
|
|
