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SF bug 1061968: threads: segfault or Py_FatalError at exit PyGILState_Ensure(): The fix in 2.4a3 for bug 1010677 reintroduced thread shutdown race bug 225673. Repaired by (once again) ensuring the GIL is held whenever deleting a thread state. Alas, there's no useful test case for this shy bug. Four years ago, only Guido could provoke it, on his box, and today only Armin can provoke it on his box. I've never been able to provoke it (but not for lack of trying!). This is a critical fix for 2.3.5 too, since the fix for 1010677 got backported there already and so also reintroduced 225673. I don't intend to backport this fix. For whoever (if anyone) does, there are other thread fixes in 2.4 that need backporting too, and I bet they need to happen first for this patch to apply cleanly.
author Tim Peters <tim.peters@gmail.com>
date Mon, 08 Nov 2004 04:30:21 +0000
parents 8b116a8449bd
children e38335d4df91 df5719c298db
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1
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2 /*
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3 * Initialization.
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4 */
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5 static void
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6 PyThread__init_thread(void)
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10 /*
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11 * Thread support.
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12 */
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13 long
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14 PyThread_start_new_thread(void (*func)(void *), void *arg)
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15 {
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16 int success = 0; /* init not needed when SOLARIS_THREADS and */
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17 /* C_THREADS implemented properly */
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19 dprintf(("PyThread_start_new_thread called\n"));
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20 if (!initialized)
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21 PyThread_init_thread();
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22 return success < 0 ? -1 : 0;
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26 PyThread_get_thread_ident(void)
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27 {
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28 if (!initialized)
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29 PyThread_init_thread();
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30 }
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33 void do_PyThread_exit_thread(int no_cleanup)
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35 dprintf(("PyThread_exit_thread called\n"));
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37 if (no_cleanup)
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38 _exit(0);
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39 else
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40 exit(0);
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41 }
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43 void
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44 PyThread_exit_thread(void)
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46 do_PyThread_exit_thread(0);
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50 PyThread__exit_thread(void)
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52 do_PyThread_exit_thread(1);
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55 #ifndef NO_EXIT_PROG
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57 void do_PyThread_exit_prog(int status, int no_cleanup)
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59 dprintf(("PyThread_exit_prog(%d) called\n", status));
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60 if (!initialized)
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61 if (no_cleanup)
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62 _exit(status);
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63 else
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64 exit(status);
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65 }
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68 PyThread_exit_prog(int status)
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70 do_PyThread_exit_prog(status, 0);
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74 PyThread__exit_prog(int status)
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76 do_PyThread_exit_prog(status, 1);
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77 }
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78 #endif /* NO_EXIT_PROG */
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80 /*
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81 * Lock support.
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82 */
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83 PyThread_type_lock
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84 PyThread_allocate_lock(void)
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85 {
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87 dprintf(("PyThread_allocate_lock called\n"));
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88 if (!initialized)
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89 PyThread_init_thread();
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91 dprintf(("PyThread_allocate_lock() -> %p\n", lock));
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92 return (PyThread_type_lock) lock;
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96 PyThread_free_lock(PyThread_type_lock lock)
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98 dprintf(("PyThread_free_lock(%p) called\n", lock));
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101 int
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102 PyThread_acquire_lock(PyThread_type_lock lock, int waitflag)
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103 {
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104 int success;
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106 dprintf(("PyThread_acquire_lock(%p, %d) called\n", lock, waitflag));
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107 dprintf(("PyThread_acquire_lock(%p, %d) -> %d\n", lock, waitflag, success));
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108 return success;
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109 }
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111 void
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112 PyThread_release_lock(PyThread_type_lock lock)
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113 {
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114 dprintf(("PyThread_release_lock(%p) called\n", lock));
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115 }