diff options
| -rw-r--r-- | boehmgc-coroutine-sp-fallback.diff | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/boehmgc-coroutine-sp-fallback.diff b/boehmgc-coroutine-sp-fallback.diff deleted file mode 100644 index 8fdafbecb..000000000 --- a/boehmgc-coroutine-sp-fallback.diff +++ /dev/null @@ -1,77 +0,0 @@ -diff --git a/darwin_stop_world.c b/darwin_stop_world.c -index 3dbaa3fb..36a1d1f7 100644 ---- a/darwin_stop_world.c -+++ b/darwin_stop_world.c -@@ -352,6 +352,7 @@ GC_INNER void GC_push_all_stacks(void) - int nthreads = 0; - word total_size = 0; - mach_msg_type_number_t listcount = (mach_msg_type_number_t)THREAD_TABLE_SZ; -+ size_t stack_limit; - if (!EXPECT(GC_thr_initialized, TRUE)) - GC_thr_init(); - -@@ -407,6 +408,19 @@ GC_INNER void GC_push_all_stacks(void) - GC_push_all_stack_sections(lo, hi, p->traced_stack_sect); - } - if (altstack_lo) { -+ // When a thread goes into a coroutine, we lose its original sp until -+ // control flow returns to the thread. -+ // While in the coroutine, the sp points outside the thread stack, -+ // so we can detect this and push the entire thread stack instead, -+ // as an approximation. -+ // We assume that the coroutine has similarly added its entire stack. -+ // This could be made accurate by cooperating with the application -+ // via new functions and/or callbacks. -+ stack_limit = pthread_get_stacksize_np(p->id); -+ if (altstack_lo >= altstack_hi || altstack_lo < altstack_hi - stack_limit) { // sp outside stack -+ altstack_lo = altstack_hi - stack_limit; -+ } -+ - total_size += altstack_hi - altstack_lo; - GC_push_all_stack(altstack_lo, altstack_hi); - } -diff --git a/pthread_stop_world.c b/pthread_stop_world.c -index 4b2c429..1fb4c52 100644 ---- a/pthread_stop_world.c -+++ b/pthread_stop_world.c -@@ -673,6 +673,8 @@ GC_INNER void GC_push_all_stacks(void) - struct GC_traced_stack_sect_s *traced_stack_sect; - pthread_t self = pthread_self(); - word total_size = 0; -+ size_t stack_limit; -+ pthread_attr_t pattr; - - if (!EXPECT(GC_thr_initialized, TRUE)) - GC_thr_init(); -@@ -722,6 +724,31 @@ GC_INNER void GC_push_all_stacks(void) - hi = p->altstack + p->altstack_size; - /* FIXME: Need to scan the normal stack too, but how ? */ - /* FIXME: Assume stack grows down */ -+ } else { -+ if (pthread_getattr_np(p->id, &pattr)) { -+ ABORT("GC_push_all_stacks: pthread_getattr_np failed!"); -+ } -+ if (pthread_attr_getstacksize(&pattr, &stack_limit)) { -+ ABORT("GC_push_all_stacks: pthread_attr_getstacksize failed!"); -+ } -+ if (pthread_attr_destroy(&pattr)) { -+ ABORT("GC_push_all_stacks: pthread_attr_destroy failed!"); -+ } -+ // When a thread goes into a coroutine, we lose its original sp until -+ // control flow returns to the thread. -+ // While in the coroutine, the sp points outside the thread stack, -+ // so we can detect this and push the entire thread stack instead, -+ // as an approximation. -+ // We assume that the coroutine has similarly added its entire stack. -+ // This could be made accurate by cooperating with the application -+ // via new functions and/or callbacks. -+ #ifndef STACK_GROWS_UP -+ if (lo >= hi || lo < hi - stack_limit) { // sp outside stack -+ lo = hi - stack_limit; -+ } -+ #else -+ #error "STACK_GROWS_UP not supported in boost_coroutine2 (as of june 2021), so we don't support it in Nix." -+ #endif - } - GC_push_all_stack_sections(lo, hi, traced_stack_sect); - # ifdef STACK_GROWS_UP |