diff options
Diffstat (limited to 'src/lisp.h')
| -rw-r--r-- | src/lisp.h | 59 |
1 files changed, 56 insertions, 3 deletions
diff --git a/src/lisp.h b/src/lisp.h index deeca9bc86b..21709b12598 100644 --- a/src/lisp.h +++ b/src/lisp.h @@ -31,6 +31,7 @@ along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */ #include <inttypes.h> #include <limits.h> +#include <attribute.h> #include <intprops.h> #include <verify.h> @@ -3453,6 +3454,41 @@ backtrace_debug_on_exit (union specbinding *pdl) return pdl->bt.debug_on_exit; } +void grow_specpdl_allocation (void); + +/* Grow the specpdl stack by one entry. + The caller should have already initialized the entry. + Signal an error on stack overflow. + + Make sure that there is always one unused entry past the top of the + stack, so that the just-initialized entry is safely unwound if + memory exhausted and an error is signaled here. Also, allocate a + never-used entry just before the bottom of the stack; sometimes its + address is taken. */ +INLINE void +grow_specpdl (void) +{ + specpdl_ptr++; + if (specpdl_ptr == specpdl_end) + grow_specpdl_allocation (); +} + +INLINE specpdl_ref +record_in_backtrace (Lisp_Object function, Lisp_Object *args, ptrdiff_t nargs) +{ + specpdl_ref count = SPECPDL_INDEX (); + + eassert (nargs >= UNEVALLED); + specpdl_ptr->bt.kind = SPECPDL_BACKTRACE; + specpdl_ptr->bt.debug_on_exit = false; + specpdl_ptr->bt.function = function; + current_thread->stack_top = specpdl_ptr->bt.args = args; + specpdl_ptr->bt.nargs = nargs; + grow_specpdl (); + + return count; +} + /* This structure helps implement the `catch/throw' and `condition-case/signal' control structures. A struct handler contains all the information needed to restore the state of the interpreter after a non-local jump. @@ -3510,6 +3546,7 @@ struct handler sys_jmp_buf jmp; EMACS_INT f_lisp_eval_depth; specpdl_ref pdlcount; + struct bc_frame *act_rec; int poll_suppress_count; int interrupt_input_blocked; }; @@ -4051,6 +4088,7 @@ extern void alloc_unexec_pre (void); extern void alloc_unexec_post (void); extern void mark_stack (char const *, char const *); extern void flush_stack_call_func1 (void (*func) (void *arg), void *arg); +extern void mark_memory (void const *start, void const *end); /* Force callee-saved registers and register windows onto the stack, so that conservative garbage collection can see their values. */ @@ -4468,7 +4506,6 @@ extern Lisp_Object safe_call2 (Lisp_Object, Lisp_Object, Lisp_Object); extern void init_eval (void); extern void syms_of_eval (void); extern void prog_ignore (Lisp_Object); -extern specpdl_ref record_in_backtrace (Lisp_Object, Lisp_Object *, ptrdiff_t); extern void mark_specpdl (union specbinding *first, union specbinding *ptr); extern void get_backtrace (Lisp_Object array); Lisp_Object backtrace_top_function (void); @@ -4817,9 +4854,24 @@ extern int read_bytecode_char (bool); /* Defined in bytecode.c. */ extern void syms_of_bytecode (void); -extern Lisp_Object exec_byte_code (Lisp_Object, Lisp_Object, Lisp_Object, - ptrdiff_t, ptrdiff_t, Lisp_Object *); +extern Lisp_Object exec_byte_code (Lisp_Object, ptrdiff_t, + ptrdiff_t, Lisp_Object *); extern Lisp_Object get_byte_code_arity (Lisp_Object); +extern void init_bc_thread (struct bc_thread_state *bc); +extern void free_bc_thread (struct bc_thread_state *bc); +extern void mark_bytecode (struct bc_thread_state *bc); + +INLINE struct bc_frame * +get_act_rec (struct thread_state *th) +{ + return th->bc.fp; +} + +INLINE void +set_act_rec (struct thread_state *th, struct bc_frame *act_rec) +{ + th->bc.fp = act_rec; +} /* Defined in macros.c. */ extern void init_macros (void); @@ -4874,6 +4926,7 @@ extern void child_setup_tty (int); extern void setup_pty (int); extern int set_window_size (int, int, int); extern EMACS_INT get_random (void); +extern unsigned long int get_random_ulong (void); extern void seed_random (void *, ptrdiff_t); extern void init_random (void); extern void emacs_backtrace (int); |