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Eagerly initialize thread VM; remove scm_the_vm

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* libguile/threads.c (thread_mark): Unconditionally call
  scm_i_vm_mark_stack.
  (guilify_self_1): Eagerly prepare the thread stack, before entering
  Guile mode.  It's only a page of mmap, after all.
* libguile/vm.c (scm_i_vm_prepare_stack): Rename from init_vm.
  (thread_vm, scm_the_vm): Remove.
  (VM_DEFINE_HOOK, scm_vm_trace_level, scm_set_vm_trace_level_x)
  (scm_vm_engine, scm_c_set_vm_engine_x, scm_i_capture_current_stack)
  (scm_call_n, scm_call_with_stack_overflow_handler): Adapt to get VM
  from thread.
  (scm_i_vm_free_stack): Memset the whole thing to 0 when we're done.
* libguile/control.c (scm_abort_to_prompt_star)
* libguile/eval.c (eval):
* libguile/throw.c (catch, abort_to_prompt): Get VM from thread.
This commit is contained in:
Andy Wingo 2018-06-24 09:32:11 +02:00
parent 2480761bde
commit 7f7169847e
6 changed files with 62 additions and 71 deletions
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2
libguile/control.c
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@ -204,7 +204,7 @@ SCM_DEFINE (scm_abort_to_prompt_star, "abort-to-prompt*", 2, 0, 0,
for (i = 0; i < n; i++, args = scm_cdr (args))
argv[i] = scm_car (args);
scm_c_abort (scm_the_vm (), tag, n, argv, NULL);
scm_c_abort (&SCM_I_CURRENT_THREAD->vm, tag, n, argv, NULL);
/* Oh, what, you're still here? The abort must have been reinstated. Actually,
that's quite impossible, given that we're already in C-land here, so...