Ensure gdb and lldb "see" instances of static inline helpers

This makes it possible to use e.g. TNUM_OBJ in gdb and lldb even
when debugging an optimized build.

src/debug.c

@@ -1,5 +1,10 @@
 #include <src/system.h>
 
+#include <src/compiled.h>
+#include <src/hookintrprtr.h>
+#include <src/calls.h>
+#include <src/fibhash.h>
+
 #if defined(HAVE_BACKTRACE) && defined(PRINT_BACKTRACE)
 #include <execinfo.h>
 #include <signal.h>
@@ -42,3 +47,198 @@ void InstallBacktraceHandlers(void) {
 }
 
 #endif
+
+
+// Global array of function pointers to static inline functions.
+//
+// This is a trick to force compilers to emit explicit code for these
+// functions at least once, so that they can be used from debuggers like
+// gdb or lldb.
+typedef void (* VoidFunc)(void);
+VoidFunc debug_func_pointers[] = {
+   (VoidFunc)ADDR_OBJ,
+   (VoidFunc)ADDR_PPERM2,
+   (VoidFunc)ADDR_PPERM4,
+   (VoidFunc)ADDR_TRANS2,
+   (VoidFunc)ADDR_TRANS4,
+   (VoidFunc)AlwaysNo,
+   (VoidFunc)AlwaysYes,
+   (VoidFunc)ARE_INTOBJS,
+   (VoidFunc)ASS_LIST,
+   (VoidFunc)AssConstantGVar,
+   (VoidFunc)AssReadOnlyGVar,
+   (VoidFunc)ASSS_LIST,
+   (VoidFunc)BAG_HEADER,
+   (VoidFunc)BASE_PTR_PLIST,
+   (VoidFunc)BLOCKS_BLIST,
+   (VoidFunc)BLOCKS_BLIST_UNSAFE,
+   (VoidFunc)BODY_FUNC,
+   (VoidFunc)BODY_HEADER,
+   (VoidFunc)C_MAKE_MED_INT,
+   (VoidFunc)C_NORMALIZE_64BIT,
+   (VoidFunc)C_SET_LIMB4,
+   (VoidFunc)C_SET_LIMB8,
+   (VoidFunc)CAPACITY_PLIST,
+   (VoidFunc)CAPACITY_PREC,
+   (VoidFunc)CHANGED_BAG,
+   (VoidFunc)CHAR_VALUE,
+   (VoidFunc)CHARS_STRING,
+   (VoidFunc)CheckRecursionBefore,
+   (VoidFunc)CLEAR_OBJ_FLAG,
+   (VoidFunc)CODEG_PPERM,
+   (VoidFunc)CONST_ADDR_OBJ,
+   (VoidFunc)CONST_PTR_BAG,
+   (VoidFunc)COPY_CHARS,
+   (VoidFunc)COUNT_TRUES_BLOCK,
+   (VoidFunc)COUNT_TRUES_BLOCKS,
+   (VoidFunc)CSTR_STRING,
+   (VoidFunc)CURR_FUNC,
+   (VoidFunc)DEG_PPERM,
+   (VoidFunc)DEG_PPERM2,
+   (VoidFunc)DEG_PPERM4,
+   (VoidFunc)DEG_TRANS,
+   (VoidFunc)DEG_TRANS2,
+   (VoidFunc)DEG_TRANS4,
+   (VoidFunc)DEN_RAT,
+   (VoidFunc)DETECT_INTOBJ_OVERFLOW,
+   (VoidFunc)ELM_DEFAULT_LIST,
+   (VoidFunc)ELM_LIST,
+   (VoidFunc)ELM_PLIST,
+   (VoidFunc)ELM0_LIST,
+   (VoidFunc)ELMS_LIST,
+   (VoidFunc)ELMV_LIST,
+   (VoidFunc)ELMV0_LIST,
+   (VoidFunc)ELMW_LIST,
+   (VoidFunc)ENVI_FUNC,
+   (VoidFunc)EXEC_STAT,
+   (VoidFunc)FEXS_FUNC,
+   (VoidFunc)FibHash,
+   (VoidFunc)FillInVersion ,
+   (VoidFunc)FUNC_HEADER,
+   (VoidFunc)GET_ELM_PREC,
+   (VoidFunc)GET_ELM_RANGE,
+   (VoidFunc)GET_ELM_STRING,
+   (VoidFunc)GET_INC_RANGE,
+   (VoidFunc)GET_LEN_RANGE,
+   (VoidFunc)GET_LEN_STRING,
+   (VoidFunc)GET_LOW_RANGE,
+   (VoidFunc)GET_RNAM_PREC,
+   (VoidFunc)GROW_PLIST,
+   (VoidFunc)GROW_STRING,
+   (VoidFunc)HDLR_FUNC,
+   (VoidFunc)HookedLineIntoFunction,
+   (VoidFunc)HookedLineOutFunction,
+   (VoidFunc)INT_INTOBJ,
+   (VoidFunc)INTOBJ_INT,
+   (VoidFunc)IS_BLIST_REP,
+   (VoidFunc)IS_BLIST_REP_WITH_COPYING,
+   (VoidFunc)IS_DENSE_LIST,
+   (VoidFunc)IS_DENSE_PLIST,
+   (VoidFunc)IS_FFE,
+   (VoidFunc)IS_HOMOG_LIST,
+   (VoidFunc)IS_INTOBJ,
+   (VoidFunc)IS_LIST,
+   (VoidFunc)IS_LVARS_OR_HVARS,
+   (VoidFunc)IS_MODULE_BUILTIN,
+   (VoidFunc)IS_MODULE_DYNAMIC,
+   (VoidFunc)IS_MODULE_STATIC,
+   (VoidFunc)IS_MUTABLE_PLIST,
+   (VoidFunc)IS_NONNEG_INTOBJ,
+   (VoidFunc)IS_PLIST,
+   (VoidFunc)IS_PLIST_OR_POSOBJ,
+   (VoidFunc)IS_POS_INTOBJ,
+   (VoidFunc)IS_POSS_LIST,
+   (VoidFunc)IS_PPERM,
+   (VoidFunc)IS_PREC,
+   (VoidFunc)IS_PREC_OR_COMOBJ,
+   (VoidFunc)IS_RANGE,
+   (VoidFunc)IS_SMALL_LIST,
+   (VoidFunc)IS_SSORT_LIST,
+   (VoidFunc)IS_STRING,
+   (VoidFunc)IS_STRING_REP,
+   (VoidFunc)IS_TABLE_LIST,
+   (VoidFunc)IS_TRANS,
+   (VoidFunc)ISB_LIST,
+#ifdef HPCGAP
+   (VoidFunc)LCKS_FUNC,
+#endif
+   (VoidFunc)LEN_BLIST,
+   (VoidFunc)LEN_LIST,
+   (VoidFunc)LEN_PLIST,
+   (VoidFunc)LEN_PREC,
+   (VoidFunc)LENGTH,
+   (VoidFunc)MakeHighVars,
+   (VoidFunc)MakeImmString,
+   (VoidFunc)MakeString,
+   (VoidFunc)MarkBag,
+   (VoidFunc)NAME_FUNC,
+   (VoidFunc)NAMS_FUNC,
+   (VoidFunc)NARG_FUNC,
+   (VoidFunc)NEW_PLIST,
+   (VoidFunc)NEW_RANGE_NSORT,
+   (VoidFunc)NEW_RANGE_SSORT,
+   (VoidFunc)NEW_TRANS,
+   (VoidFunc)NEW_TRANS2,
+   (VoidFunc)NEW_TRANS4,
+   (VoidFunc)NewWord,
+   (VoidFunc)NLOC_FUNC,
+   (VoidFunc)NUM_RAT,
+   (VoidFunc)NUMBER_BLOCKS_BLIST,
+   (VoidFunc)PLAIN_LIST,
+   (VoidFunc)PLEN_SIZE_BLIST,
+   (VoidFunc)PopPlist,
+   (VoidFunc)POS_LIST,
+   (VoidFunc)PROF_FUNC,
+   (VoidFunc)PTR_BAG,
+   (VoidFunc)PushPlist,
+   (VoidFunc)RANK_PPERM,
+   (VoidFunc)RANK_TRANS,
+   (VoidFunc)RegisterStatWithHook,
+   (VoidFunc)RESIZE_WORD,
+   (VoidFunc)SET_BODY_FUNC,
+   (VoidFunc)SET_CHAR_VALUE,
+   (VoidFunc)SET_DEN_RAT,
+   (VoidFunc)SET_ELM_PLIST,
+   (VoidFunc)SET_ELM_PREC,
+   (VoidFunc)SET_ELM_STRING,
+   (VoidFunc)SET_ENVI_FUNC,
+   (VoidFunc)SET_FEXS_FUNC,
+   (VoidFunc)SET_HDLR_FUNC,
+   (VoidFunc)SET_INC_RANGE,
+#ifdef HPCGAP
+   (VoidFunc)SET_LCKS_FUNC,
+#endif
+   (VoidFunc)SET_LEN_BLIST,
+   (VoidFunc)SET_LEN_PLIST,
+   (VoidFunc)SET_LEN_PREC,
+   (VoidFunc)SET_LEN_RANGE,
+   (VoidFunc)SET_LEN_STRING,
+   (VoidFunc)SET_LOW_RANGE,
+   (VoidFunc)SET_NAMS_FUNC,
+   (VoidFunc)SET_NARG_FUNC,
+   (VoidFunc)SET_NLOC_FUNC,
+   (VoidFunc)SET_NUM_RAT,
+   (VoidFunc)SET_OBJ_FLAG,
+   (VoidFunc)SET_PROF_FUNC,
+   (VoidFunc)SET_PTR_BAG,
+   (VoidFunc)SET_RNAM_PREC,
+   (VoidFunc)SET_VAL_MACFLOAT,
+   (VoidFunc)SetBrkCallTo,
+   (VoidFunc)SHRINK_PLIST,
+   (VoidFunc)SHRINK_STRING,
+   (VoidFunc)SIZE_BAG,
+   (VoidFunc)SIZE_BAG_CONTENTS,
+   (VoidFunc)SIZE_OBJ,
+   (VoidFunc)SIZE_PLEN_BLIST,
+   (VoidFunc)SIZEBAG_STRINGLEN,
+   (VoidFunc)SwitchToNewLvars,
+   (VoidFunc)SwitchToOldLVars,
+   (VoidFunc)SwitchToOldLVarsAndFree,
+   (VoidFunc)TEST_OBJ_FLAG,
+   (VoidFunc)TNAM_OBJ,
+   (VoidFunc)TNUM_BAG,
+   (VoidFunc)TNUM_OBJ,
+   (VoidFunc)UNB_LIST,
+   (VoidFunc)VAL_MACFLOAT,
+   (VoidFunc)VisitStatIfHooked,
+};