X-Git-Url: http://git.sourceforge.jp/view?a=blobdiff_plain;f=gcc%2Fdbxout.c;h=f6948a0bd72e1d18cb49a633caeab96785fc6504;hb=1b716045fc9e347b54af8e6c4b669dc8caff23b8;hp=e4c797894c0421158374fbff0fd93b2809c93e85;hpb=54bd150912c56f3e9c67f9dbcf16e8029f08da03;p=pf3gnuchains%2Fgcc-fork.git diff --git a/gcc/dbxout.c b/gcc/dbxout.c index e4c797894c0..f6948a0bd72 100644 --- a/gcc/dbxout.c +++ b/gcc/dbxout.c @@ -1,6 +1,6 @@ /* Output dbx-format symbol table information from GNU compiler. Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, - 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. + 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc. This file is part of GCC. @@ -146,6 +146,10 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #define STABS_GCC_MARKER "gcc2_compiled." #endif +#ifndef NO_DBX_FUNCTION_END +#define NO_DBX_FUNCTION_END 0 +#endif + enum typestatus {TYPE_UNSEEN, TYPE_XREF, TYPE_DEFINED}; /* Structure recording information about a C data type. @@ -179,25 +183,40 @@ static GTY(()) int typevec_len; static GTY(()) int next_type_number; +/* The C front end may call dbxout_symbol before dbxout_init runs. + We save all such decls in this list and output them when we get + to dbxout_init. */ + +static GTY(()) tree preinit_symbols; + enum binclstatus {BINCL_NOT_REQUIRED, BINCL_PENDING, BINCL_PROCESSED}; /* When using N_BINCL in dbx output, each type number is actually a pair of the file number and the type number within the file. This is a stack of input files. */ -struct dbx_file GTY(()) +struct dbx_file { struct dbx_file *next; int file_number; int next_type_number; - enum binclstatus bincl_status; /* Keep track of lazy bincl. */ - const char *pending_bincl_name; /* Name of bincl. */ - struct dbx_file *prev; /* Chain to traverse all pending bincls. */ + enum binclstatus bincl_status; /* Keep track of lazy bincl. */ + const char *pending_bincl_name; /* Name of bincl. */ + struct dbx_file *prev; /* Chain to traverse all pending bincls. */ }; -/* This is the top of the stack. */ - -static GTY(()) struct dbx_file *current_file; +/* This is the top of the stack. + + This is not saved for PCH, because restoring a PCH should not change it. + next_file_number does have to be saved, because the PCH may use some + file numbers; however, just before restoring a PCH, next_file_number + should always be 0 because we should not have needed any file numbers + yet. */ + +#if (defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)) \ + && defined (DBX_USE_BINCL) +static struct dbx_file *current_file; +#endif /* This is the next file number to use. */ @@ -261,7 +280,7 @@ static const char *cwd; /* 1 if PARM is passed to this function in memory. */ #define PARM_PASSED_IN_MEMORY(PARM) \ - (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM) + (MEM_P (DECL_INCOMING_RTL (PARM))) /* A C expression for the integer offset value of an automatic variable (N_LSYM) having address X (an RTX). */ @@ -328,7 +347,6 @@ static void dbxout_finish (const char *); static void dbxout_start_source_file (unsigned, const char *); static void dbxout_end_source_file (unsigned); static void dbxout_typedefs (tree); -static void dbxout_fptype_value (tree); static void dbxout_type_index (tree); #if DBX_CONTIN_LENGTH > 0 static void dbxout_continue (void); @@ -351,12 +369,14 @@ static void dbxout_prepare_symbol (tree); static void dbxout_finish_symbol (tree); static void dbxout_block (tree, int, tree); static void dbxout_global_decl (tree); +static void dbxout_type_decl (tree, int); static void dbxout_handle_pch (unsigned); /* The debug hooks structure. */ #if defined (DBX_DEBUGGING_INFO) static void dbxout_source_line (unsigned int, const char *); +static void dbxout_begin_prologue (unsigned int, const char *); static void dbxout_source_file (FILE *, const char *); static void dbxout_function_end (void); static void dbxout_begin_function (tree); @@ -374,23 +394,26 @@ const struct gcc_debug_hooks dbx_debug_hooks = dbxout_end_source_file, dbxout_begin_block, dbxout_end_block, - debug_true_tree, /* ignore_block */ - dbxout_source_line, /* source_line */ - dbxout_source_line, /* begin_prologue: just output line info */ - debug_nothing_int_charstar, /* end_prologue */ - debug_nothing_int_charstar, /* end_epilogue */ + debug_true_tree, /* ignore_block */ + dbxout_source_line, /* source_line */ + dbxout_begin_prologue, /* begin_prologue */ + debug_nothing_int_charstar, /* end_prologue */ + debug_nothing_int_charstar, /* end_epilogue */ #ifdef DBX_FUNCTION_FIRST dbxout_begin_function, #else - debug_nothing_tree, /* begin_function */ + debug_nothing_tree, /* begin_function */ #endif - debug_nothing_int, /* end_function */ + debug_nothing_int, /* end_function */ dbxout_function_decl, - dbxout_global_decl, /* global_decl */ - debug_nothing_tree, /* deferred_inline_function */ - debug_nothing_tree, /* outlining_inline_function */ - debug_nothing_rtx, /* label */ - dbxout_handle_pch /* handle_pch */ + dbxout_global_decl, /* global_decl */ + dbxout_type_decl, /* type_decl */ + debug_nothing_tree_tree, /* imported_module_or_decl */ + debug_nothing_tree, /* deferred_inline_function */ + debug_nothing_tree, /* outlining_inline_function */ + debug_nothing_rtx, /* label */ + dbxout_handle_pch, /* handle_pch */ + debug_nothing_rtx /* var_location */ }; #endif /* DBX_DEBUGGING_INFO */ @@ -405,19 +428,22 @@ const struct gcc_debug_hooks xcoff_debug_hooks = dbxout_end_source_file, xcoffout_begin_block, xcoffout_end_block, - debug_true_tree, /* ignore_block */ + debug_true_tree, /* ignore_block */ xcoffout_source_line, - xcoffout_begin_prologue, /* begin_prologue */ - debug_nothing_int_charstar, /* end_prologue */ + xcoffout_begin_prologue, /* begin_prologue */ + debug_nothing_int_charstar, /* end_prologue */ xcoffout_end_epilogue, - debug_nothing_tree, /* begin_function */ + debug_nothing_tree, /* begin_function */ xcoffout_end_function, - debug_nothing_tree, /* function_decl */ - dbxout_global_decl, /* global_decl */ - debug_nothing_tree, /* deferred_inline_function */ - debug_nothing_tree, /* outlining_inline_function */ - debug_nothing_rtx, /* label */ - dbxout_handle_pch /* handle_pch */ + debug_nothing_tree, /* function_decl */ + dbxout_global_decl, /* global_decl */ + dbxout_type_decl, /* type_decl */ + debug_nothing_tree_tree, /* imported_module_or_decl */ + debug_nothing_tree, /* deferred_inline_function */ + debug_nothing_tree, /* outlining_inline_function */ + debug_nothing_rtx, /* label */ + dbxout_handle_pch, /* handle_pch */ + debug_nothing_rtx /* var_location */ }; #endif /* XCOFF_DEBUGGING_INFO */ @@ -426,13 +452,26 @@ static void dbxout_function_end (void) { char lscope_label_name[100]; + + /* The Lscope label must be emitted even if we aren't doing anything + else; dbxout_block needs it. */ + function_section (current_function_decl); + /* Convert Ltext into the appropriate format for local labels in case the system doesn't insert underscores in front of user generated labels. */ ASM_GENERATE_INTERNAL_LABEL (lscope_label_name, "Lscope", scope_labelno); - (*targetm.asm_out.internal_label) (asmfile, "Lscope", scope_labelno); + targetm.asm_out.internal_label (asmfile, "Lscope", scope_labelno); scope_labelno++; + /* The N_FUN tag at the end of the function is a GNU extension, + which may be undesirable, and is unnecessary if we do not have + named sections. */ + if (!use_gnu_debug_info_extensions + || NO_DBX_FUNCTION_END + || !targetm.have_named_sections) + return; + /* By convention, GCC will mark the end of a function with an N_FUN symbol and an empty string. */ #ifdef DBX_OUTPUT_NFUN @@ -444,6 +483,9 @@ dbxout_function_end (void) assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); fprintf (asmfile, "\n"); #endif + + if (!flag_debug_only_used_symbols) + fprintf (asmfile, "%s%d,0,0\n", ASM_STABD_OP, N_ENSYM); } #endif /* DBX_DEBUGGING_INFO */ @@ -454,7 +496,7 @@ static void dbxout_init (const char *input_file_name) { char ltext_label_name[100]; - tree syms = (*lang_hooks.decls.getdecls) (); + tree syms = lang_hooks.decls.getdecls (); asmfile = asm_out_file; @@ -498,7 +540,7 @@ dbxout_init (const char *input_file_name) assemble_name (asmfile, ltext_label_name); fputc ('\n', asmfile); text_section (); - (*targetm.asm_out.internal_label) (asmfile, "Ltext", 0); + targetm.asm_out.internal_label (asmfile, "Ltext", 0); #endif /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */ #ifdef DBX_OUTPUT_GCC_MARKER @@ -514,7 +556,7 @@ dbxout_init (const char *input_file_name) next_type_number = 1; #ifdef DBX_USE_BINCL - current_file = ggc_alloc (sizeof *current_file); + current_file = xmalloc (sizeof *current_file); current_file->next = NULL; current_file->file_number = 0; current_file->next_type_number = 1; @@ -524,39 +566,35 @@ dbxout_init (const char *input_file_name) current_file->pending_bincl_name = NULL; #endif - /* Make sure that types `int' and `char' have numbers 1 and 2. - Definitions of other integer types will refer to those numbers. - (Actually it should no longer matter what their numbers are. - Also, if any types with tags have been defined, dbxout_symbol - will output them first, so the numbers won't be 1 and 2. That - happens in C++. So it's a good thing it should no longer matter). */ - -#ifdef DBX_OUTPUT_STANDARD_TYPES - DBX_OUTPUT_STANDARD_TYPES (syms); -#endif - /* Get all permanent types that have typedef names, and output them all, except for those already output. Some language front ends - put these declarations in the top-level scope; some do not. */ - dbxout_typedefs ((*lang_hooks.decls.builtin_type_decls) ()); + put these declarations in the top-level scope; some do not; + the latter are responsible for calling debug_hooks->type_decl from + their record_builtin_type function. */ dbxout_typedefs (syms); + + if (preinit_symbols) + { + tree t; + for (t = nreverse (preinit_symbols); t; t = TREE_CHAIN (t)) + dbxout_symbol (TREE_VALUE (t), 0); + preinit_symbols = 0; + } } -/* Output any typedef names for types described by TYPE_DECLs in SYMS, - in the reverse order from that which is found in SYMS. */ +/* Output any typedef names for types described by TYPE_DECLs in SYMS. */ static void dbxout_typedefs (tree syms) { - if (syms) + for (; syms != NULL_TREE; syms = TREE_CHAIN (syms)) { - dbxout_typedefs (TREE_CHAIN (syms)); if (TREE_CODE (syms) == TYPE_DECL) { tree type = TREE_TYPE (syms); if (TYPE_NAME (type) && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL - && COMPLETE_TYPE_P (type) + && COMPLETE_OR_VOID_TYPE_P (type) && ! TREE_ASM_WRITTEN (TYPE_NAME (type))) dbxout_symbol (TYPE_NAME (type), 0); } @@ -628,7 +666,7 @@ dbxout_start_source_file (unsigned int line ATTRIBUTE_UNUSED, const char *filename ATTRIBUTE_UNUSED) { #ifdef DBX_USE_BINCL - struct dbx_file *n = ggc_alloc (sizeof *n); + struct dbx_file *n = xmalloc (sizeof *n); n->next = current_file; n->next_type_number = 1; @@ -710,13 +748,29 @@ dbxout_source_file (FILE *file, const char *filename) && DECL_SECTION_NAME (current_function_decl) != NULL_TREE) ; /* Don't change section amid function. */ else - text_section (); - (*targetm.asm_out.internal_label) (file, "Ltext", source_label_number); + { + if (!in_text_section () && !in_unlikely_text_section ()) + text_section (); + } + targetm.asm_out.internal_label (file, "Ltext", source_label_number); source_label_number++; lastfile = filename; } } +/* Output N_BNSYM and line number symbol entry. */ + +static void +dbxout_begin_prologue (unsigned int lineno, const char *filename) +{ + if (use_gnu_debug_info_extensions + && !NO_DBX_FUNCTION_END + && !flag_debug_only_used_symbols) + fprintf (asmfile, "%s%d,0,0\n", ASM_STABD_OP, N_BNSYM); + + dbxout_source_line (lineno, filename); +} + /* Output a line number symbol entry for source file FILENAME and line number LINENO. */ @@ -739,7 +793,7 @@ static void dbxout_begin_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int n) { emit_pending_bincls_if_required (); - (*targetm.asm_out.internal_label) (asmfile, "LBB", n); + targetm.asm_out.internal_label (asmfile, "LBB", n); } /* Describe the end line-number of an internal block within a function. */ @@ -748,7 +802,7 @@ static void dbxout_end_block (unsigned int line ATTRIBUTE_UNUSED, unsigned int n) { emit_pending_bincls_if_required (); - (*targetm.asm_out.internal_label) (asmfile, "LBE", n); + targetm.asm_out.internal_label (asmfile, "LBE", n); } /* Output dbx data for a function definition. @@ -768,12 +822,7 @@ dbxout_function_decl (tree decl) #ifdef DBX_OUTPUT_FUNCTION_END DBX_OUTPUT_FUNCTION_END (asmfile, decl); #endif - if (use_gnu_debug_info_extensions -#if defined(NO_DBX_FUNCTION_END) - && ! NO_DBX_FUNCTION_END -#endif - && targetm.have_named_sections) - dbxout_function_end (); + dbxout_function_end (); } #endif /* DBX_DEBUGGING_INFO */ @@ -794,6 +843,14 @@ dbxout_global_decl (tree decl) } } +/* This is just a function-type adapter; dbxout_symbol does exactly + what we want but returns an int. */ +static void +dbxout_type_decl (tree decl, int local) +{ + dbxout_symbol (decl, local); +} + /* At the end of compilation, finish writing the symbol table. Unless you define DBX_OUTPUT_MAIN_SOURCE_FILE_END, the default is to do nothing. */ @@ -808,60 +865,6 @@ dbxout_finish (const char *filename ATTRIBUTE_UNUSED) debug_free_queue (); } -/* Output floating point type values used by the 'R' stab letter. - These numbers come from include/aout/stab_gnu.h in binutils/gdb. - - There are only 3 real/complex types defined, and we need 7/6. - We use NF_SINGLE as a generic float type, and NF_COMPLEX as a generic - complex type. Since we have the type size anyways, we don't really need - to distinguish between different FP types, we only need to distinguish - between float and complex. This works fine with gdb. - - We only use this for complex types, to avoid breaking backwards - compatibility for real types. complex types aren't in ISO C90, so it is - OK if old debuggers don't understand the debug info we emit for them. */ - -/* ??? These are supposed to be IEEE types, but we don't check for that. - We could perhaps add additional numbers for non-IEEE types if we need - them. */ - -static void -dbxout_fptype_value (tree type) -{ - char value = '0'; - enum machine_mode mode = TYPE_MODE (type); - - if (TREE_CODE (type) == REAL_TYPE) - { - if (mode == SFmode) - value = '1'; - else if (mode == DFmode) - value = '2'; - else if (mode == TFmode || mode == XFmode) - value = '6'; - else - /* Use NF_SINGLE as a generic real type for other sizes. */ - value = '1'; - } - else if (TREE_CODE (type) == COMPLEX_TYPE) - { - if (mode == SCmode) - value = '3'; - else if (mode == DCmode) - value = '4'; - else if (mode == TCmode || mode == XCmode) - value = '5'; - else - /* Use NF_COMPLEX as a generic complex type for other sizes. */ - value = '3'; - } - else - abort (); - - putc (value, asmfile); - CHARS (1); -} - /* Output the index of a type. */ static void @@ -912,6 +915,11 @@ dbxout_type_fields (tree type) field that we can support. */ for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem)) { + /* If one of the nodes is an error_mark or its type is then + return early. */ + if (tem == error_mark_node || TREE_TYPE (tem) == error_mark_node) + return; + /* Omit here local type decls until we know how to support them. */ if (TREE_CODE (tem) == TYPE_DECL /* Omit fields whose position or size are variable or too large to @@ -1407,7 +1415,7 @@ dbxout_type (tree type, int full) break; case INTEGER_TYPE: - if (type == char_type_node && ! TREE_UNSIGNED (type)) + if (type == char_type_node && ! TYPE_UNSIGNED (type)) { /* Output the type `char' as a subrange of itself! I don't understand this definition, just copied it @@ -1515,7 +1523,7 @@ dbxout_type (tree type, int full) fprintf (asmfile, "r"); CHARS (1); dbxout_type_index (char_type_node); - fprintf (asmfile, ";0;%d;", TREE_UNSIGNED (type) ? 255 : 127); + fprintf (asmfile, ";0;%d;", TYPE_UNSIGNED (type) ? 255 : 127); CHARS (7); } break; @@ -1544,15 +1552,14 @@ dbxout_type (tree type, int full) break; case COMPLEX_TYPE: - /* Differs from the REAL_TYPE by its new data type number */ + /* Differs from the REAL_TYPE by its new data type number. + R3 is NF_COMPLEX. We don't try to use any of the other NF_* + codes since gdb doesn't care anyway. */ if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE) { - putc ('R', asmfile); - CHARS (1); - dbxout_fptype_value (type); - putc (';', asmfile); - CHARS (1); + fputs ("R3;", asmfile); + CHARS (3); print_wide_int (2 * int_size_in_bytes (TREE_TYPE (type))); fputs (";0;", asmfile); CHARS (3); @@ -1651,12 +1658,7 @@ dbxout_type (tree type, int full) case UNION_TYPE: case QUAL_UNION_TYPE: { - int i, n_baseclasses = 0; - - if (TYPE_BINFO (type) != 0 - && TREE_CODE (TYPE_BINFO (type)) == TREE_VEC - && TYPE_BINFO_BASETYPES (type) != 0) - n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type)); + tree binfo = TYPE_BINFO (type); /* Output a structure type. We must use the same test here as we use in the DBX_NO_XREFS case above. */ @@ -1703,63 +1705,72 @@ dbxout_type (tree type, int full) CHARS (1); print_wide_int (int_size_in_bytes (type)); - if (use_gnu_debug_info_extensions) + if (binfo) { - if (n_baseclasses) - { - have_used_extensions = 1; - fprintf (asmfile, "!%d,", n_baseclasses); - CHARS (8); - } - } - for (i = 0; i < n_baseclasses; i++) - { - tree binfo = TYPE_BINFO (type); - tree child = BINFO_BASETYPE (binfo, i); - tree access = (BINFO_BASEACCESSES (binfo) - ? BINFO_BASEACCESS (binfo, i) : access_public_node); - + int i; + tree child; + VEC (tree) *accesses = BINFO_BASE_ACCESSES (binfo); + if (use_gnu_debug_info_extensions) { - have_used_extensions = 1; - putc (TREE_VIA_VIRTUAL (child) ? '1' : '0', asmfile); - putc (access == access_public_node ? '2' : '0', asmfile); - CHARS (2); - if (TREE_VIA_VIRTUAL (child) - && strcmp (lang_hooks.name, "GNU C++") == 0) - /* For a virtual base, print the (negative) offset within - the vtable where we must look to find the necessary - adjustment. */ - print_wide_int (tree_low_cst (BINFO_VPTR_FIELD (child), 0) - * BITS_PER_UNIT); - else - print_wide_int (tree_low_cst (BINFO_OFFSET (child), 0) - * BITS_PER_UNIT); - putc (',', asmfile); - CHARS (1); - dbxout_type (BINFO_TYPE (child), 0); - putc (';', asmfile); - CHARS (1); + if (BINFO_N_BASE_BINFOS (binfo)) + { + have_used_extensions = 1; + fprintf (asmfile, "!%u,", BINFO_N_BASE_BINFOS (binfo)); + CHARS (8); + } } - else + for (i = 0; BINFO_BASE_ITERATE (binfo, i, child); i++) { - /* Print out the base class information with fields - which have the same names at the types they hold. */ - dbxout_type_name (BINFO_TYPE (child)); - putc (':', asmfile); - CHARS (1); - dbxout_type (BINFO_TYPE (child), full); - putc (',', asmfile); - CHARS (1); - print_wide_int (tree_low_cst (BINFO_OFFSET (child), 0) - * BITS_PER_UNIT); - putc (',', asmfile); - CHARS (1); - print_wide_int (tree_low_cst (TYPE_SIZE (BINFO_TYPE (child)), - 0) - * BITS_PER_UNIT); - putc (';', asmfile); - CHARS (1); + tree access = (accesses ? VEC_index (tree, accesses, i) + : access_public_node); + + if (use_gnu_debug_info_extensions) + { + have_used_extensions = 1; + putc (BINFO_VIRTUAL_P (child) ? '1' : '0', asmfile); + putc (access == access_public_node ? '2' : + (access == access_protected_node ? '1' :'0'), + asmfile); + CHARS (2); + if (BINFO_VIRTUAL_P (child) + && strcmp (lang_hooks.name, "GNU C++") == 0) + /* For a virtual base, print the (negative) + offset within the vtable where we must look + to find the necessary adjustment. */ + print_wide_int + (tree_low_cst (BINFO_VPTR_FIELD (child), 0) + * BITS_PER_UNIT); + else + print_wide_int (tree_low_cst (BINFO_OFFSET (child), 0) + * BITS_PER_UNIT); + putc (',', asmfile); + CHARS (1); + dbxout_type (BINFO_TYPE (child), 0); + putc (';', asmfile); + CHARS (1); + } + else + { + /* Print out the base class information with + fields which have the same names at the types + they hold. */ + dbxout_type_name (BINFO_TYPE (child)); + putc (':', asmfile); + CHARS (1); + dbxout_type (BINFO_TYPE (child), full); + putc (',', asmfile); + CHARS (1); + print_wide_int (tree_low_cst (BINFO_OFFSET (child), 0) + * BITS_PER_UNIT); + putc (',', asmfile); + CHARS (1); + print_wide_int + (tree_low_cst (TYPE_SIZE (BINFO_TYPE (child)), 0) + * BITS_PER_UNIT); + putc (';', asmfile); + CHARS (1); + } } } } @@ -1936,10 +1947,10 @@ print_int_cst_bounds_in_octal_p (tree type) && TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node) || ((TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node)) - && TREE_UNSIGNED (type)) + && TYPE_UNSIGNED (type)) || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT || (TYPE_PRECISION (type) == HOST_BITS_PER_WIDE_INT - && TREE_UNSIGNED (type)))) + && TYPE_UNSIGNED (type)))) return TRUE; else return FALSE; @@ -2091,11 +2102,6 @@ dbxout_symbol (tree decl, int local ATTRIBUTE_UNUSED) /* "Intercept" dbxout_symbol() calls like we do all debug_hooks. */ ++debug_nesting; - /* Cast avoids warning in old compilers. */ - current_sym_code = (STAB_CODE_TYPE) 0; - current_sym_value = 0; - current_sym_addr = 0; - /* Ignore nameless syms, but don't ignore type tags. */ if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL) @@ -2106,14 +2112,22 @@ dbxout_symbol (tree decl, int local ATTRIBUTE_UNUSED) symbol nodees are flagged with TREE_USED. Ignore any that aren't flaged as TREE_USED. */ + if (flag_debug_only_used_symbols + && (!TREE_USED (decl) + && (TREE_CODE (decl) != VAR_DECL || !DECL_INITIAL (decl)))) + DBXOUT_DECR_NESTING_AND_RETURN (0); + + /* If dbxout_init has not yet run, queue this symbol for later. */ + if (!typevec) + { + preinit_symbols = tree_cons (0, decl, preinit_symbols); + DBXOUT_DECR_NESTING_AND_RETURN (0); + } + if (flag_debug_only_used_symbols) { tree t; - if (!TREE_USED (decl) - && (TREE_CODE (decl) != VAR_DECL || !DECL_INITIAL (decl))) - DBXOUT_DECR_NESTING_AND_RETURN (0); - /* We now have a used symbol. We need to generate the info for the symbol's type in addition to the symbol itself. These type symbols are queued to be generated after were done with @@ -2182,7 +2196,7 @@ dbxout_symbol (tree decl, int local ATTRIBUTE_UNUSED) context = decl_function_context (decl); if (context == current_function_decl) break; - if (GET_CODE (DECL_RTL (decl)) != MEM + if (!MEM_P (DECL_RTL (decl)) || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF) break; FORCE_TEXT; @@ -2217,6 +2231,20 @@ dbxout_symbol (tree decl, int local ATTRIBUTE_UNUSED) if (TREE_ASM_WRITTEN (decl) || TYPE_DECL_SUPPRESS_DEBUG (decl)) DBXOUT_DECR_NESTING_AND_RETURN (0); + /* Don't output typedefs for types with magic type numbers (XCOFF). */ +#ifdef DBX_ASSIGN_FUNDAMENTAL_TYPE_NUMBER + { + int fundamental_type_number = + DBX_ASSIGN_FUNDAMENTAL_TYPE_NUMBER (decl); + + if (fundamental_type_number != 0) + { + TREE_ASM_WRITTEN (decl) = 1; + TYPE_SYMTAB_ADDRESS (TREE_TYPE (decl)) = fundamental_type_number; + DBXOUT_DECR_NESTING_AND_RETURN (0); + } + } +#endif FORCE_TEXT; result = 1; { @@ -2396,7 +2424,7 @@ dbxout_symbol (tree decl, int local ATTRIBUTE_UNUSED) } else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE) { - /* don't know how to do this yet. */ + /* Don't know how to do this yet. */ } break; } @@ -2445,14 +2473,14 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home) while (GET_CODE (value) == SUBREG) value = SUBREG_REG (value); - if (GET_CODE (value) == REG) + if (REG_P (value)) { if (REGNO (value) >= FIRST_PSEUDO_REGISTER) return 0; } home = alter_subreg (&home); } - if (GET_CODE (home) == REG) + if (REG_P (home)) { regno = REGNO (home); if (regno >= FIRST_PSEUDO_REGISTER) @@ -2472,7 +2500,7 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home) no letter at all, and N_LSYM, for auto variable, r and N_RSYM for register variable. */ - if (GET_CODE (home) == MEM + if (MEM_P (home) && GET_CODE (XEXP (home, 0)) == SYMBOL_REF) { if (TREE_PUBLIC (decl)) @@ -2508,11 +2536,27 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home) if (GET_CODE (current_sym_addr) == SYMBOL_REF && CONSTANT_POOL_ADDRESS_P (current_sym_addr)) { - rtx tmp = get_pool_constant (current_sym_addr); + bool marked; + rtx tmp = get_pool_constant_mark (current_sym_addr, &marked); - if (GET_CODE (tmp) == SYMBOL_REF - || GET_CODE (tmp) == LABEL_REF) - current_sym_addr = tmp; + if (GET_CODE (tmp) == SYMBOL_REF) + { + current_sym_addr = tmp; + if (CONSTANT_POOL_ADDRESS_P (current_sym_addr)) + get_pool_constant_mark (current_sym_addr, &marked); + else + marked = true; + } + else if (GET_CODE (tmp) == LABEL_REF) + { + current_sym_addr = tmp; + marked = true; + } + + /* If all references to the constant pool were optimized + out, we just ignore the symbol. */ + if (!marked) + return 0; } /* Ultrix `as' seems to need this. */ @@ -2529,9 +2573,9 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home) current_sym_code = N_RSYM; current_sym_value = DBX_REGISTER_NUMBER (regno); } - else if (GET_CODE (home) == MEM - && (GET_CODE (XEXP (home, 0)) == MEM - || (GET_CODE (XEXP (home, 0)) == REG + else if (MEM_P (home) + && (MEM_P (XEXP (home, 0)) + || (REG_P (XEXP (home, 0)) && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM && REGNO (XEXP (home, 0)) != STACK_POINTER_REGNUM #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM @@ -2543,10 +2587,9 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home) then it means the object is variable-sized and address through that register or stack slot. DBX has no way to represent this so all we can do is output the variable as a pointer. - If it's not a parameter, ignore it. - (VAR_DECLs like this can be made by integrate.c.) */ + If it's not a parameter, ignore it. */ { - if (GET_CODE (XEXP (home, 0)) == REG) + if (REG_P (XEXP (home, 0))) { letter = 'r'; current_sym_code = N_RSYM; @@ -2570,13 +2613,13 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home) type = make_node (POINTER_TYPE); TREE_TYPE (type) = TREE_TYPE (decl); } - else if (GET_CODE (home) == MEM - && GET_CODE (XEXP (home, 0)) == REG) + else if (MEM_P (home) + && REG_P (XEXP (home, 0))) { current_sym_code = N_LSYM; current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0)); } - else if (GET_CODE (home) == MEM + else if (MEM_P (home) && GET_CODE (XEXP (home, 0)) == PLUS && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT) { @@ -2585,7 +2628,7 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home) We want the value of that CONST_INT. */ current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0)); } - else if (GET_CODE (home) == MEM + else if (MEM_P (home) && GET_CODE (XEXP (home, 0)) == CONST) { /* Handle an obscure case which can arise when optimizing and @@ -2622,10 +2665,6 @@ dbxout_symbol_location (tree decl, tree type, const char *suffix, rtx home) else dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0)); - /* Cast avoids warning in old compilers. */ - current_sym_code = (STAB_CODE_TYPE) 0; - current_sym_value = 0; - current_sym_addr = 0; dbxout_prepare_symbol (decl); if (WORDS_BIG_ENDIAN) @@ -2665,9 +2704,11 @@ dbxout_symbol_name (tree decl, const char *suffix, int letter) { const char *name; - if (DECL_CONTEXT (decl) && TYPE_P (DECL_CONTEXT (decl))) - /* One slight hitch: if this is a VAR_DECL which is a static - class member, we must put out the mangled name instead of the + if (DECL_CONTEXT (decl) + && (TYPE_P (DECL_CONTEXT (decl)) + || TREE_CODE (DECL_CONTEXT (decl)) == NAMESPACE_DECL)) + /* One slight hitch: if this is a VAR_DECL which is a class member + or a namespace member, we must put out the mangled name instead of the DECL_NAME. Note also that static member (variable) names DO NOT begin with underscores in .stabs directives. */ name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)); @@ -2693,6 +2734,14 @@ dbxout_prepare_symbol (tree decl ATTRIBUTE_UNUSED) dbxout_source_file (asmfile, filename); #endif + + /* Initialize variables used to communicate each symbol's debug + information to dbxout_finish_symbol with zeroes. */ + + /* Cast avoids warning in old compilers. */ + current_sym_code = (STAB_CODE_TYPE) 0; + current_sym_value = 0; + current_sym_addr = 0; } static void @@ -2749,7 +2798,10 @@ dbxout_parms (tree parms) emit_pending_bincls_if_required (); for (; parms; parms = TREE_CHAIN (parms)) - if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node) + if (DECL_NAME (parms) + && TREE_TYPE (parms) != error_mark_node + && DECL_RTL_SET_P (parms) + && DECL_INCOMING_RTL (parms)) { dbxout_prepare_symbol (parms); @@ -2817,7 +2869,7 @@ dbxout_parms (tree parms) current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr); dbxout_finish_symbol (parms); } - else if (GET_CODE (DECL_RTL (parms)) == REG) + else if (REG_P (DECL_RTL (parms))) { rtx best_rtl; char regparm_letter; @@ -2867,8 +2919,8 @@ dbxout_parms (tree parms) dbxout_type (parm_type, 0); dbxout_finish_symbol (parms); } - else if (GET_CODE (DECL_RTL (parms)) == MEM - && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG + else if (MEM_P (DECL_RTL (parms)) + && REG_P (XEXP (DECL_RTL (parms), 0)) && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM @@ -2921,8 +2973,8 @@ dbxout_parms (tree parms) dbxout_type (TREE_TYPE (parms), 0); dbxout_finish_symbol (parms); } - else if (GET_CODE (DECL_RTL (parms)) == MEM - && GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM) + else if (MEM_P (DECL_RTL (parms)) + && MEM_P (XEXP (DECL_RTL (parms), 0))) { /* Parm was passed via invisible reference, with the reference living on the stack. DECL_RTL looks like @@ -2931,7 +2983,7 @@ dbxout_parms (tree parms) const char *const decl_name = (DECL_NAME (parms) ? IDENTIFIER_POINTER (DECL_NAME (parms)) : "(anon)"); - if (GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 0)) == REG) + if (REG_P (XEXP (XEXP (DECL_RTL (parms), 0), 0))) current_sym_value = 0; else current_sym_value @@ -2948,7 +3000,7 @@ dbxout_parms (tree parms) dbxout_type (TREE_TYPE (parms), 0); dbxout_finish_symbol (parms); } - else if (GET_CODE (DECL_RTL (parms)) == MEM + else if (MEM_P (DECL_RTL (parms)) && XEXP (DECL_RTL (parms), 0) != const0_rtx /* ??? A constant address for a parm can happen when the reg it lives in is equiv to a constant in memory. @@ -2962,7 +3014,7 @@ dbxout_parms (tree parms) in which case we want the value of that CONST_INT, or (MEM (REG ...)), in which case we use a value of zero. */ - if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG) + if (REG_P (XEXP (DECL_RTL (parms), 0))) current_sym_value = 0; else current_sym_value @@ -3031,7 +3083,7 @@ dbxout_reg_parms (tree parms) /* Report parms that live in registers during the function but were passed in memory. */ - if (GET_CODE (DECL_RTL (parms)) == REG + if (REG_P (DECL_RTL (parms)) && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER) dbxout_symbol_location (parms, TREE_TYPE (parms), 0, DECL_RTL (parms)); @@ -3039,7 +3091,7 @@ dbxout_reg_parms (tree parms) dbxout_symbol_location (parms, TREE_TYPE (parms), 0, DECL_RTL (parms)); /* Report parms that live in memory but not where they were passed. */ - else if (GET_CODE (DECL_RTL (parms)) == MEM + else if (MEM_P (DECL_RTL (parms)) && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms))) dbxout_symbol_location (parms, TREE_TYPE (parms), 0, DECL_RTL (parms)); @@ -3062,6 +3114,46 @@ dbxout_args (tree args) } } +/* Subroutine of dbxout_block. Emit an N_LBRAC stab referencing LABEL. + BEGIN_LABEL is the name of the beginning of the function, which may + be required. */ +static void +dbx_output_lbrac (const char *label, + const char *begin_label ATTRIBUTE_UNUSED) +{ +#ifdef DBX_OUTPUT_LBRAC + DBX_OUTPUT_LBRAC (asmfile, label); +#else + fprintf (asmfile, "%s%d,0,0,", ASM_STABN_OP, N_LBRAC); + assemble_name (asmfile, label); +#if DBX_BLOCKS_FUNCTION_RELATIVE + putc ('-', asmfile); + assemble_name (asmfile, begin_label); +#endif + fprintf (asmfile, "\n"); +#endif +} + +/* Subroutine of dbxout_block. Emit an N_RBRAC stab referencing LABEL. + BEGIN_LABEL is the name of the beginning of the function, which may + be required. */ +static void +dbx_output_rbrac (const char *label, + const char *begin_label ATTRIBUTE_UNUSED) +{ +#ifdef DBX_OUTPUT_RBRAC + DBX_OUTPUT_RBRAC (asmfile, label); +#else + fprintf (asmfile, "%s%d,0,0,", ASM_STABN_OP, N_RBRAC); + assemble_name (asmfile, label); +#if DBX_BLOCKS_FUNCTION_RELATIVE + putc ('-', asmfile); + assemble_name (asmfile, begin_label); +#endif + fprintf (asmfile, "\n"); +#endif +} + /* Output everything about a symbol block (a BLOCK node that represents a scope level), including recursive output of contained blocks. @@ -3082,15 +3174,11 @@ dbxout_args (tree args) static void dbxout_block (tree block, int depth, tree args) { - int blocknum = -1; - -#if DBX_BLOCKS_FUNCTION_RELATIVE const char *begin_label; if (current_function_func_begin_label != NULL_TREE) begin_label = IDENTIFIER_POINTER (current_function_func_begin_label); else begin_label = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0); -#endif while (block) { @@ -3098,6 +3186,7 @@ dbxout_block (tree block, int depth, tree args) if (TREE_USED (block) && TREE_ASM_WRITTEN (block)) { int did_output; + int blocknum = BLOCK_NUMBER (block); /* In dbx format, the syms of a block come before the N_LBRAC. If nothing is output, we don't need the N_LBRAC, either. */ @@ -3111,11 +3200,20 @@ dbxout_block (tree block, int depth, tree args) the block. Use the block's tree-walk order to generate the assembler symbols LBBn and LBEn that final will define around the code in this block. */ - if (depth > 0 && did_output) + if (did_output) { char buf[20]; - blocknum = BLOCK_NUMBER (block); - ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum); + const char *scope_start; + + if (depth == 0) + /* The outermost block doesn't get LBB labels; use + the function symbol. */ + scope_start = begin_label; + else + { + ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum); + scope_start = buf; + } if (BLOCK_HANDLER_BLOCK (block)) { @@ -3125,44 +3223,30 @@ dbxout_block (tree block, int depth, tree args) { fprintf (asmfile, "%s\"%s:C1\",%d,0,0,", ASM_STABS_OP, IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH); - assemble_name (asmfile, buf); + assemble_name (asmfile, scope_start); fprintf (asmfile, "\n"); decl = TREE_CHAIN (decl); } } - -#ifdef DBX_OUTPUT_LBRAC - DBX_OUTPUT_LBRAC (asmfile, buf); -#else - fprintf (asmfile, "%s%d,0,0,", ASM_STABN_OP, N_LBRAC); - assemble_name (asmfile, buf); -#if DBX_BLOCKS_FUNCTION_RELATIVE - putc ('-', asmfile); - assemble_name (asmfile, begin_label); -#endif - fprintf (asmfile, "\n"); -#endif + dbx_output_lbrac (scope_start, begin_label); } /* Output the subblocks. */ dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE); /* Refer to the marker for the end of the block. */ - if (depth > 0 && did_output) + if (did_output) { - char buf[20]; - ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum); -#ifdef DBX_OUTPUT_RBRAC - DBX_OUTPUT_RBRAC (asmfile, buf); -#else - fprintf (asmfile, "%s%d,0,0,", ASM_STABN_OP, N_RBRAC); - assemble_name (asmfile, buf); -#if DBX_BLOCKS_FUNCTION_RELATIVE - putc ('-', asmfile); - assemble_name (asmfile, begin_label); -#endif - fprintf (asmfile, "\n"); -#endif + char buf[100]; + if (depth == 0) + /* The outermost block doesn't get LBE labels; + use the "scope" label which will be emitted + by dbxout_function_end. */ + ASM_GENERATE_INTERNAL_LABEL (buf, "Lscope", scope_labelno); + else + ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum); + + dbx_output_rbrac (buf, begin_label); } } block = BLOCK_CHAIN (block);