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1688 lines
48 KiB
C
1688 lines
48 KiB
C
/* Output sdb-format symbol table information from GNU compiler.
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Copyright (C) 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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02111-1307, USA. */
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/* mike@tredysvr.Tredydev.Unisys.COM says:
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I modified the struct.c example and have a nm of a .o resulting from the
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AT&T C compiler. From the example below I would conclude the following:
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1. All .defs from structures are emitted as scanned. The example below
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clearly shows the symbol table entries for BoxRec2 are after the first
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function.
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2. All functions and their locals (including statics) are emitted as scanned.
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3. All nested unnamed union and structure .defs must be emitted before
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the structure in which they are nested. The AT&T assembler is a
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one pass beast as far as symbolics are concerned.
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4. All structure .defs are emitted before the typedefs that refer to them.
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5. All top level static and external variable definitions are moved to the
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end of file with all top level statics occurring first before externs.
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6. All undefined references are at the end of the file.
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*/
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "debug.h"
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#include "tree.h"
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#include "ggc.h"
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static GTY(()) tree anonymous_types;
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/* Counter for sdbout_source_line. */
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static GTY(()) int sdbout_source_line_counter;
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/* Counter to generate unique "names" for nameless struct members. */
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static GTY(()) int unnamed_struct_number;
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#ifdef SDB_DEBUGGING_INFO
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#include "rtl.h"
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#include "regs.h"
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#include "flags.h"
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#include "insn-config.h"
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#include "reload.h"
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#include "output.h"
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#include "toplev.h"
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#include "tm_p.h"
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#include "gsyms.h"
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#include "langhooks.h"
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#include "target.h"
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/* 1 if PARM is passed to this function in memory. */
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#define PARM_PASSED_IN_MEMORY(PARM) \
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(GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
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/* A C expression for the integer offset value of an automatic variable
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(C_AUTO) having address X (an RTX). */
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#ifndef DEBUGGER_AUTO_OFFSET
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#define DEBUGGER_AUTO_OFFSET(X) \
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(GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
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#endif
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/* A C expression for the integer offset value of an argument (C_ARG)
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having address X (an RTX). The nominal offset is OFFSET. */
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#ifndef DEBUGGER_ARG_OFFSET
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#define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
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#endif
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/* Line number of beginning of current function, minus one.
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Negative means not in a function or not using sdb. */
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int sdb_begin_function_line = -1;
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extern FILE *asm_out_file;
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extern tree current_function_decl;
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#include "sdbout.h"
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static void sdbout_init (const char *);
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static void sdbout_finish (const char *);
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static void sdbout_start_source_file (unsigned int, const char *);
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static void sdbout_end_source_file (unsigned int);
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static void sdbout_begin_block (unsigned int, unsigned int);
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static void sdbout_end_block (unsigned int, unsigned int);
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static void sdbout_source_line (unsigned int, const char *);
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static void sdbout_end_epilogue (unsigned int, const char *);
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static void sdbout_global_decl (tree);
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#ifndef MIPS_DEBUGGING_INFO
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static void sdbout_begin_prologue (unsigned int, const char *);
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#endif
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static void sdbout_end_prologue (unsigned int, const char *);
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static void sdbout_begin_function (tree);
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static void sdbout_end_function (unsigned int);
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static void sdbout_toplevel_data (tree);
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static void sdbout_label (rtx);
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static char *gen_fake_label (void);
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static int plain_type (tree);
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static int template_name_p (tree);
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static void sdbout_record_type_name (tree);
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static int plain_type_1 (tree, int);
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static void sdbout_block (tree);
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static void sdbout_syms (tree);
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#ifdef SDB_ALLOW_FORWARD_REFERENCES
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static void sdbout_queue_anonymous_type (tree);
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static void sdbout_dequeue_anonymous_types (void);
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#endif
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static void sdbout_type (tree);
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static void sdbout_field_types (tree);
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static void sdbout_one_type (tree);
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static void sdbout_parms (tree);
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static void sdbout_reg_parms (tree);
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static void sdbout_global_decl (tree);
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/* Random macros describing parts of SDB data. */
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/* Default value of delimiter is ";". */
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#ifndef SDB_DELIM
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#define SDB_DELIM ";"
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#endif
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/* Maximum number of dimensions the assembler will allow. */
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#ifndef SDB_MAX_DIM
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#define SDB_MAX_DIM 4
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#endif
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#ifndef PUT_SDB_SCL
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#define PUT_SDB_SCL(a) fprintf(asm_out_file, "\t.scl\t%d%s", (a), SDB_DELIM)
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#endif
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#ifndef PUT_SDB_INT_VAL
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#define PUT_SDB_INT_VAL(a) \
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do { \
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fprintf (asm_out_file, "\t.val\t" HOST_WIDE_INT_PRINT_DEC "%s", \
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(HOST_WIDE_INT) (a), SDB_DELIM); \
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} while (0)
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#endif
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#ifndef PUT_SDB_VAL
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#define PUT_SDB_VAL(a) \
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( fputs ("\t.val\t", asm_out_file), \
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output_addr_const (asm_out_file, (a)), \
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fprintf (asm_out_file, SDB_DELIM))
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#endif
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#ifndef PUT_SDB_DEF
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#define PUT_SDB_DEF(a) \
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do { fprintf (asm_out_file, "\t.def\t"); \
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assemble_name (asm_out_file, a); \
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fprintf (asm_out_file, SDB_DELIM); } while (0)
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#endif
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#ifndef PUT_SDB_PLAIN_DEF
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#define PUT_SDB_PLAIN_DEF(a) fprintf(asm_out_file,"\t.def\t.%s%s",a, SDB_DELIM)
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#endif
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#ifndef PUT_SDB_ENDEF
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#define PUT_SDB_ENDEF fputs("\t.endef\n", asm_out_file)
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#endif
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#ifndef PUT_SDB_TYPE
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#define PUT_SDB_TYPE(a) fprintf(asm_out_file, "\t.type\t0%o%s", a, SDB_DELIM)
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#endif
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#ifndef PUT_SDB_SIZE
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#define PUT_SDB_SIZE(a) \
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do { \
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fprintf (asm_out_file, "\t.size\t" HOST_WIDE_INT_PRINT_DEC "%s", \
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(HOST_WIDE_INT) (a), SDB_DELIM); \
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} while(0)
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#endif
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#ifndef PUT_SDB_START_DIM
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#define PUT_SDB_START_DIM fprintf(asm_out_file, "\t.dim\t")
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#endif
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#ifndef PUT_SDB_NEXT_DIM
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#define PUT_SDB_NEXT_DIM(a) fprintf(asm_out_file, "%d,", a)
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#endif
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#ifndef PUT_SDB_LAST_DIM
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#define PUT_SDB_LAST_DIM(a) fprintf(asm_out_file, "%d%s", a, SDB_DELIM)
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#endif
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#ifndef PUT_SDB_TAG
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#define PUT_SDB_TAG(a) \
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do { fprintf (asm_out_file, "\t.tag\t"); \
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assemble_name (asm_out_file, a); \
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fprintf (asm_out_file, SDB_DELIM); } while (0)
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#endif
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#ifndef PUT_SDB_BLOCK_START
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#define PUT_SDB_BLOCK_START(LINE) \
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fprintf (asm_out_file, \
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"\t.def\t.bb%s\t.val\t.%s\t.scl\t100%s\t.line\t%d%s\t.endef\n", \
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SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
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#endif
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#ifndef PUT_SDB_BLOCK_END
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#define PUT_SDB_BLOCK_END(LINE) \
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fprintf (asm_out_file, \
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"\t.def\t.eb%s\t.val\t.%s\t.scl\t100%s\t.line\t%d%s\t.endef\n", \
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SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
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#endif
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#ifndef PUT_SDB_FUNCTION_START
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#define PUT_SDB_FUNCTION_START(LINE) \
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fprintf (asm_out_file, \
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"\t.def\t.bf%s\t.val\t.%s\t.scl\t101%s\t.line\t%d%s\t.endef\n", \
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SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
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#endif
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#ifndef PUT_SDB_FUNCTION_END
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#define PUT_SDB_FUNCTION_END(LINE) \
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fprintf (asm_out_file, \
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"\t.def\t.ef%s\t.val\t.%s\t.scl\t101%s\t.line\t%d%s\t.endef\n", \
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SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
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#endif
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#ifndef SDB_GENERATE_FAKE
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#define SDB_GENERATE_FAKE(BUFFER, NUMBER) \
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sprintf ((BUFFER), ".%dfake", (NUMBER));
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#endif
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/* Return the sdb tag identifier string for TYPE
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if TYPE has already been defined; otherwise return a null pointer. */
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#define KNOWN_TYPE_TAG(type) TYPE_SYMTAB_POINTER (type)
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/* Set the sdb tag identifier string for TYPE to NAME. */
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#define SET_KNOWN_TYPE_TAG(TYPE, NAME) \
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TYPE_SYMTAB_POINTER (TYPE) = (char *)(NAME)
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/* Return the name (a string) of the struct, union or enum tag
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described by the TREE_LIST node LINK. This is 0 for an anonymous one. */
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#define TAG_NAME(link) \
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(((link) && TREE_PURPOSE ((link)) \
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&& IDENTIFIER_POINTER (TREE_PURPOSE ((link)))) \
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? IDENTIFIER_POINTER (TREE_PURPOSE ((link))) : (char *) 0)
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/* Ensure we don't output a negative line number. */
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#define MAKE_LINE_SAFE(line) \
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if ((int) line <= sdb_begin_function_line) \
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line = sdb_begin_function_line + 1
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/* Perform linker optimization of merging header file definitions together
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for targets with MIPS_DEBUGGING_INFO defined. This won't work without a
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post 960826 version of GAS. Nothing breaks with earlier versions of GAS,
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the optimization just won't be done. The native assembler already has the
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necessary support. */
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#ifdef MIPS_DEBUGGING_INFO
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#ifndef PUT_SDB_SRC_FILE
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#define PUT_SDB_SRC_FILE(FILENAME) \
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output_file_directive (asm_out_file, (FILENAME))
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#endif
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/* ECOFF linkers have an optimization that does the same kind of thing as
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N_BINCL/E_INCL in stabs: eliminate duplicate debug information in the
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executable. To achieve this, GCC must output a .file for each file
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name change. */
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/* This is a stack of input files. */
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struct sdb_file
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{
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struct sdb_file *next;
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const char *name;
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};
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/* This is the top of the stack. */
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static struct sdb_file *current_file;
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#endif /* MIPS_DEBUGGING_INFO */
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/* The debug hooks structure. */
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const struct gcc_debug_hooks sdb_debug_hooks =
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{
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sdbout_init, /* init */
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sdbout_finish, /* finish */
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debug_nothing_int_charstar, /* define */
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debug_nothing_int_charstar, /* undef */
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sdbout_start_source_file, /* start_source_file */
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sdbout_end_source_file, /* end_source_file */
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sdbout_begin_block, /* begin_block */
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sdbout_end_block, /* end_block */
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debug_true_tree, /* ignore_block */
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sdbout_source_line, /* source_line */
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#ifdef MIPS_DEBUGGING_INFO
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/* Defer on MIPS systems so that parameter descriptions follow
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function entry. */
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debug_nothing_int_charstar, /* begin_prologue */
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sdbout_end_prologue, /* end_prologue */
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#else
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sdbout_begin_prologue, /* begin_prologue */
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debug_nothing_int_charstar, /* end_prologue */
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#endif
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sdbout_end_epilogue, /* end_epilogue */
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sdbout_begin_function, /* begin_function */
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sdbout_end_function, /* end_function */
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debug_nothing_tree, /* function_decl */
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sdbout_global_decl, /* global_decl */
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debug_nothing_tree, /* deferred_inline_function */
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debug_nothing_tree, /* outlining_inline_function */
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sdbout_label, /* label */
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debug_nothing_int /* handle_pch */
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};
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/* Return a unique string to name an anonymous type. */
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static char *
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gen_fake_label (void)
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{
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char label[10];
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char *labelstr;
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SDB_GENERATE_FAKE (label, unnamed_struct_number);
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unnamed_struct_number++;
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labelstr = xstrdup (label);
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return labelstr;
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}
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/* Return the number which describes TYPE for SDB.
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For pointers, etc., this function is recursive.
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Each record, union or enumeral type must already have had a
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tag number output. */
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/* The number is given by d6d5d4d3d2d1bbbb
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where bbbb is 4 bit basic type, and di indicate one of notype,ptr,fn,array.
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Thus, char *foo () has bbbb=T_CHAR
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d1=D_FCN
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d2=D_PTR
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N_BTMASK= 017 1111 basic type field.
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N_TSHIFT= 2 derived type shift
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N_BTSHFT= 4 Basic type shift */
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/* Produce the number that describes a pointer, function or array type.
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PREV is the number describing the target, value or element type.
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DT_type describes how to transform that type. */
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#define PUSH_DERIVED_LEVEL(DT_type,PREV) \
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((((PREV) & ~(int) N_BTMASK) << (int) N_TSHIFT) \
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| ((int) DT_type << (int) N_BTSHFT) \
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| ((PREV) & (int) N_BTMASK))
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/* Number of elements used in sdb_dims. */
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static int sdb_n_dims = 0;
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/* Table of array dimensions of current type. */
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static int sdb_dims[SDB_MAX_DIM];
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/* Size of outermost array currently being processed. */
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static int sdb_type_size = -1;
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static int
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plain_type (tree type)
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{
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int val = plain_type_1 (type, 0);
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/* If we have already saved up some array dimensions, print them now. */
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if (sdb_n_dims > 0)
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{
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int i;
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PUT_SDB_START_DIM;
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for (i = sdb_n_dims - 1; i > 0; i--)
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PUT_SDB_NEXT_DIM (sdb_dims[i]);
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PUT_SDB_LAST_DIM (sdb_dims[0]);
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sdb_n_dims = 0;
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sdb_type_size = int_size_in_bytes (type);
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/* Don't kill sdb if type is not laid out or has variable size. */
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if (sdb_type_size < 0)
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sdb_type_size = 0;
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}
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/* If we have computed the size of an array containing this type,
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print it now. */
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if (sdb_type_size >= 0)
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{
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PUT_SDB_SIZE (sdb_type_size);
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sdb_type_size = -1;
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}
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return val;
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}
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static int
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template_name_p (tree name)
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{
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const char *ptr = IDENTIFIER_POINTER (name);
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while (*ptr && *ptr != '<')
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ptr++;
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return *ptr != '\0';
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}
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static void
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sdbout_record_type_name (tree type)
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{
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const char *name = 0;
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int no_name;
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if (KNOWN_TYPE_TAG (type))
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return;
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if (TYPE_NAME (type) != 0)
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{
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tree t = 0;
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/* Find the IDENTIFIER_NODE for the type name. */
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if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
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t = TYPE_NAME (type);
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else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
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{
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t = DECL_NAME (TYPE_NAME (type));
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/* The DECL_NAME for templates includes "<>", which breaks
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most assemblers. Use its assembler name instead, which
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has been mangled into being safe. */
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if (t && template_name_p (t))
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t = DECL_ASSEMBLER_NAME (TYPE_NAME (type));
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}
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/* Now get the name as a string, or invent one. */
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if (t != NULL_TREE)
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name = IDENTIFIER_POINTER (t);
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}
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no_name = (name == 0 || *name == 0);
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if (no_name)
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name = gen_fake_label ();
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SET_KNOWN_TYPE_TAG (type, name);
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#ifdef SDB_ALLOW_FORWARD_REFERENCES
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if (no_name)
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sdbout_queue_anonymous_type (type);
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#endif
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}
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/* Return the .type value for type TYPE.
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LEVEL indicates how many levels deep we have recursed into the type.
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The SDB debug format can only represent 6 derived levels of types.
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After that, we must output inaccurate debug info. We deliberately
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stop before the 7th level, so that ADA recursive types will not give an
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infinite loop. */
|
|
|
|
static int
|
|
plain_type_1 (tree type, int level)
|
|
{
|
|
if (type == 0)
|
|
type = void_type_node;
|
|
else if (type == error_mark_node)
|
|
type = integer_type_node;
|
|
else
|
|
type = TYPE_MAIN_VARIANT (type);
|
|
|
|
switch (TREE_CODE (type))
|
|
{
|
|
case VOID_TYPE:
|
|
return T_VOID;
|
|
case BOOLEAN_TYPE:
|
|
case INTEGER_TYPE:
|
|
{
|
|
int size = int_size_in_bytes (type) * BITS_PER_UNIT;
|
|
|
|
/* Carefully distinguish all the standard types of C,
|
|
without messing up if the language is not C.
|
|
Note that we check only for the names that contain spaces;
|
|
other names might occur by coincidence in other languages. */
|
|
if (TYPE_NAME (type) != 0
|
|
&& TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
|
|
&& DECL_NAME (TYPE_NAME (type)) != 0
|
|
&& TREE_CODE (DECL_NAME (TYPE_NAME (type))) == IDENTIFIER_NODE)
|
|
{
|
|
const char *const name
|
|
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
|
|
|
|
if (!strcmp (name, "char"))
|
|
return T_CHAR;
|
|
if (!strcmp (name, "unsigned char"))
|
|
return T_UCHAR;
|
|
if (!strcmp (name, "signed char"))
|
|
return T_CHAR;
|
|
if (!strcmp (name, "int"))
|
|
return T_INT;
|
|
if (!strcmp (name, "unsigned int"))
|
|
return T_UINT;
|
|
if (!strcmp (name, "short int"))
|
|
return T_SHORT;
|
|
if (!strcmp (name, "short unsigned int"))
|
|
return T_USHORT;
|
|
if (!strcmp (name, "long int"))
|
|
return T_LONG;
|
|
if (!strcmp (name, "long unsigned int"))
|
|
return T_ULONG;
|
|
}
|
|
|
|
if (size == INT_TYPE_SIZE)
|
|
return (TREE_UNSIGNED (type) ? T_UINT : T_INT);
|
|
if (size == CHAR_TYPE_SIZE)
|
|
return (TREE_UNSIGNED (type) ? T_UCHAR : T_CHAR);
|
|
if (size == SHORT_TYPE_SIZE)
|
|
return (TREE_UNSIGNED (type) ? T_USHORT : T_SHORT);
|
|
if (size == LONG_TYPE_SIZE)
|
|
return (TREE_UNSIGNED (type) ? T_ULONG : T_LONG);
|
|
if (size == LONG_LONG_TYPE_SIZE) /* better than nothing */
|
|
return (TREE_UNSIGNED (type) ? T_ULONG : T_LONG);
|
|
return 0;
|
|
}
|
|
|
|
case REAL_TYPE:
|
|
{
|
|
int precision = TYPE_PRECISION (type);
|
|
if (precision == FLOAT_TYPE_SIZE)
|
|
return T_FLOAT;
|
|
if (precision == DOUBLE_TYPE_SIZE)
|
|
return T_DOUBLE;
|
|
#ifdef EXTENDED_SDB_BASIC_TYPES
|
|
if (precision == LONG_DOUBLE_TYPE_SIZE)
|
|
return T_LNGDBL;
|
|
#else
|
|
if (precision == LONG_DOUBLE_TYPE_SIZE)
|
|
return T_DOUBLE; /* better than nothing */
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
case ARRAY_TYPE:
|
|
{
|
|
int m;
|
|
if (level >= 6)
|
|
return T_VOID;
|
|
else
|
|
m = plain_type_1 (TREE_TYPE (type), level+1);
|
|
if (sdb_n_dims < SDB_MAX_DIM)
|
|
sdb_dims[sdb_n_dims++]
|
|
= (TYPE_DOMAIN (type)
|
|
&& TYPE_MIN_VALUE (TYPE_DOMAIN (type)) != 0
|
|
&& TYPE_MAX_VALUE (TYPE_DOMAIN (type)) != 0
|
|
&& host_integerp (TYPE_MAX_VALUE (TYPE_DOMAIN (type)), 0)
|
|
&& host_integerp (TYPE_MIN_VALUE (TYPE_DOMAIN (type)), 0)
|
|
? (tree_low_cst (TYPE_MAX_VALUE (TYPE_DOMAIN (type)), 0)
|
|
- tree_low_cst (TYPE_MIN_VALUE (TYPE_DOMAIN (type)), 0) + 1)
|
|
: 0);
|
|
|
|
return PUSH_DERIVED_LEVEL (DT_ARY, m);
|
|
}
|
|
|
|
case RECORD_TYPE:
|
|
case UNION_TYPE:
|
|
case QUAL_UNION_TYPE:
|
|
case ENUMERAL_TYPE:
|
|
{
|
|
char *tag;
|
|
#ifdef SDB_ALLOW_FORWARD_REFERENCES
|
|
sdbout_record_type_name (type);
|
|
#endif
|
|
#ifndef SDB_ALLOW_UNKNOWN_REFERENCES
|
|
if ((TREE_ASM_WRITTEN (type) && KNOWN_TYPE_TAG (type) != 0)
|
|
#ifdef SDB_ALLOW_FORWARD_REFERENCES
|
|
|| TYPE_MODE (type) != VOIDmode
|
|
#endif
|
|
)
|
|
#endif
|
|
{
|
|
/* Output the referenced structure tag name
|
|
only if the .def has already been finished.
|
|
At least on 386, the Unix assembler
|
|
cannot handle forward references to tags. */
|
|
/* But the 88100, it requires them, sigh... */
|
|
/* And the MIPS requires unknown refs as well... */
|
|
tag = KNOWN_TYPE_TAG (type);
|
|
PUT_SDB_TAG (tag);
|
|
/* These 3 lines used to follow the close brace.
|
|
However, a size of 0 without a tag implies a tag of 0,
|
|
so if we don't know a tag, we can't mention the size. */
|
|
sdb_type_size = int_size_in_bytes (type);
|
|
if (sdb_type_size < 0)
|
|
sdb_type_size = 0;
|
|
}
|
|
return ((TREE_CODE (type) == RECORD_TYPE) ? T_STRUCT
|
|
: (TREE_CODE (type) == UNION_TYPE) ? T_UNION
|
|
: (TREE_CODE (type) == QUAL_UNION_TYPE) ? T_UNION
|
|
: T_ENUM);
|
|
}
|
|
case POINTER_TYPE:
|
|
case REFERENCE_TYPE:
|
|
{
|
|
int m;
|
|
if (level >= 6)
|
|
return T_VOID;
|
|
else
|
|
m = plain_type_1 (TREE_TYPE (type), level+1);
|
|
return PUSH_DERIVED_LEVEL (DT_PTR, m);
|
|
}
|
|
case FUNCTION_TYPE:
|
|
case METHOD_TYPE:
|
|
{
|
|
int m;
|
|
if (level >= 6)
|
|
return T_VOID;
|
|
else
|
|
m = plain_type_1 (TREE_TYPE (type), level+1);
|
|
return PUSH_DERIVED_LEVEL (DT_FCN, m);
|
|
}
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Output the symbols defined in block number DO_BLOCK.
|
|
|
|
This function works by walking the tree structure of blocks,
|
|
counting blocks until it finds the desired block. */
|
|
|
|
static int do_block = 0;
|
|
|
|
static void
|
|
sdbout_block (tree block)
|
|
{
|
|
while (block)
|
|
{
|
|
/* Ignore blocks never expanded or otherwise marked as real. */
|
|
if (TREE_USED (block))
|
|
{
|
|
/* When we reach the specified block, output its symbols. */
|
|
if (BLOCK_NUMBER (block) == do_block)
|
|
sdbout_syms (BLOCK_VARS (block));
|
|
|
|
/* If we are past the specified block, stop the scan. */
|
|
if (BLOCK_NUMBER (block) > do_block)
|
|
return;
|
|
|
|
/* Scan the blocks within this block. */
|
|
sdbout_block (BLOCK_SUBBLOCKS (block));
|
|
}
|
|
|
|
block = BLOCK_CHAIN (block);
|
|
}
|
|
}
|
|
|
|
/* Call sdbout_symbol on each decl in the chain SYMS. */
|
|
|
|
static void
|
|
sdbout_syms (tree syms)
|
|
{
|
|
while (syms)
|
|
{
|
|
if (TREE_CODE (syms) != LABEL_DECL)
|
|
sdbout_symbol (syms, 1);
|
|
syms = TREE_CHAIN (syms);
|
|
}
|
|
}
|
|
|
|
/* Output SDB information for a symbol described by DECL.
|
|
LOCAL is nonzero if the symbol is not file-scope. */
|
|
|
|
void
|
|
sdbout_symbol (tree decl, int local)
|
|
{
|
|
tree type = TREE_TYPE (decl);
|
|
tree context = NULL_TREE;
|
|
rtx value;
|
|
int regno = -1;
|
|
const char *name;
|
|
|
|
sdbout_one_type (type);
|
|
|
|
switch (TREE_CODE (decl))
|
|
{
|
|
case CONST_DECL:
|
|
/* Enum values are defined by defining the enum type. */
|
|
return;
|
|
|
|
case FUNCTION_DECL:
|
|
/* Don't mention a nested function under its parent. */
|
|
context = decl_function_context (decl);
|
|
if (context == current_function_decl)
|
|
return;
|
|
/* Check DECL_INITIAL to distinguish declarations from definitions.
|
|
Don't output debug info here for declarations; they will have
|
|
a DECL_INITIAL value of 0. */
|
|
if (! DECL_INITIAL (decl))
|
|
return;
|
|
if (GET_CODE (DECL_RTL (decl)) != MEM
|
|
|| GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
|
|
return;
|
|
PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
|
|
PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
|
|
PUT_SDB_SCL (TREE_PUBLIC (decl) ? C_EXT : C_STAT);
|
|
break;
|
|
|
|
case TYPE_DECL:
|
|
/* Done with tagged types. */
|
|
if (DECL_NAME (decl) == 0)
|
|
return;
|
|
if (DECL_IGNORED_P (decl))
|
|
return;
|
|
|
|
/* Output typedef name. */
|
|
if (template_name_p (DECL_NAME (decl)))
|
|
PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
|
|
else
|
|
PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_NAME (decl)));
|
|
PUT_SDB_SCL (C_TPDEF);
|
|
break;
|
|
|
|
case PARM_DECL:
|
|
/* Parm decls go in their own separate chains
|
|
and are output by sdbout_reg_parms and sdbout_parms. */
|
|
abort ();
|
|
|
|
case VAR_DECL:
|
|
/* Don't mention a variable that is external.
|
|
Let the file that defines it describe it. */
|
|
if (DECL_EXTERNAL (decl))
|
|
return;
|
|
|
|
/* Ignore __FUNCTION__, etc. */
|
|
if (DECL_IGNORED_P (decl))
|
|
return;
|
|
|
|
/* If there was an error in the declaration, don't dump core
|
|
if there is no RTL associated with the variable doesn't
|
|
exist. */
|
|
if (!DECL_RTL_SET_P (decl))
|
|
return;
|
|
|
|
SET_DECL_RTL (decl,
|
|
eliminate_regs (DECL_RTL (decl), 0, NULL_RTX));
|
|
#ifdef LEAF_REG_REMAP
|
|
if (current_function_uses_only_leaf_regs)
|
|
leaf_renumber_regs_insn (DECL_RTL (decl));
|
|
#endif
|
|
value = DECL_RTL (decl);
|
|
|
|
/* Don't mention a variable at all
|
|
if it was completely optimized into nothingness.
|
|
|
|
If DECL was from an inline function, then its rtl
|
|
is not identically the rtl that was used in this
|
|
particular compilation. */
|
|
if (GET_CODE (value) == REG)
|
|
{
|
|
regno = REGNO (value);
|
|
if (regno >= FIRST_PSEUDO_REGISTER)
|
|
return;
|
|
}
|
|
else if (GET_CODE (value) == SUBREG)
|
|
{
|
|
while (GET_CODE (value) == SUBREG)
|
|
value = SUBREG_REG (value);
|
|
if (GET_CODE (value) == REG)
|
|
{
|
|
if (REGNO (value) >= FIRST_PSEUDO_REGISTER)
|
|
return;
|
|
}
|
|
regno = REGNO (alter_subreg (&value));
|
|
SET_DECL_RTL (decl, value);
|
|
}
|
|
/* Don't output anything if an auto variable
|
|
gets RTL that is static.
|
|
GAS version 2.2 can't handle such output. */
|
|
else if (GET_CODE (value) == MEM && CONSTANT_P (XEXP (value, 0))
|
|
&& ! TREE_STATIC (decl))
|
|
return;
|
|
|
|
/* Emit any structure, union, or enum type that has not been output.
|
|
This occurs for tag-less structs (et al) used to declare variables
|
|
within functions. */
|
|
if (TREE_CODE (type) == ENUMERAL_TYPE
|
|
|| TREE_CODE (type) == RECORD_TYPE
|
|
|| TREE_CODE (type) == UNION_TYPE
|
|
|| TREE_CODE (type) == QUAL_UNION_TYPE)
|
|
{
|
|
if (COMPLETE_TYPE_P (type) /* not a forward reference */
|
|
&& KNOWN_TYPE_TAG (type) == 0) /* not yet declared */
|
|
sdbout_one_type (type);
|
|
}
|
|
|
|
/* Defer SDB information for top-level initialized variables! */
|
|
if (! local
|
|
&& GET_CODE (value) == MEM
|
|
&& DECL_INITIAL (decl))
|
|
return;
|
|
|
|
/* C++ in 2.3 makes nameless symbols. That will be fixed later.
|
|
For now, avoid crashing. */
|
|
if (DECL_NAME (decl) == NULL_TREE)
|
|
return;
|
|
|
|
/* Record the name for, starting a symtab entry. */
|
|
if (local)
|
|
name = IDENTIFIER_POINTER (DECL_NAME (decl));
|
|
else
|
|
name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
|
|
|
|
if (GET_CODE (value) == MEM
|
|
&& GET_CODE (XEXP (value, 0)) == SYMBOL_REF)
|
|
{
|
|
PUT_SDB_DEF (name);
|
|
if (TREE_PUBLIC (decl))
|
|
{
|
|
PUT_SDB_VAL (XEXP (value, 0));
|
|
PUT_SDB_SCL (C_EXT);
|
|
}
|
|
else
|
|
{
|
|
PUT_SDB_VAL (XEXP (value, 0));
|
|
PUT_SDB_SCL (C_STAT);
|
|
}
|
|
}
|
|
else if (regno >= 0)
|
|
{
|
|
PUT_SDB_DEF (name);
|
|
PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (regno));
|
|
PUT_SDB_SCL (C_REG);
|
|
}
|
|
else if (GET_CODE (value) == MEM
|
|
&& (GET_CODE (XEXP (value, 0)) == MEM
|
|
|| (GET_CODE (XEXP (value, 0)) == REG
|
|
&& REGNO (XEXP (value, 0)) != HARD_FRAME_POINTER_REGNUM
|
|
&& REGNO (XEXP (value, 0)) != STACK_POINTER_REGNUM)))
|
|
/* If the value is indirect by memory or by a register
|
|
that isn't the frame pointer
|
|
then it means the object is variable-sized and address through
|
|
that register or stack slot. COFF has no way to represent this
|
|
so all we can do is output the variable as a pointer. */
|
|
{
|
|
PUT_SDB_DEF (name);
|
|
if (GET_CODE (XEXP (value, 0)) == REG)
|
|
{
|
|
PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (XEXP (value, 0))));
|
|
PUT_SDB_SCL (C_REG);
|
|
}
|
|
else
|
|
{
|
|
/* DECL_RTL looks like (MEM (MEM (PLUS (REG...)
|
|
(CONST_INT...)))).
|
|
We want the value of that CONST_INT. */
|
|
/* Encore compiler hates a newline in a macro arg, it seems. */
|
|
PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
|
|
(XEXP (XEXP (value, 0), 0)));
|
|
PUT_SDB_SCL (C_AUTO);
|
|
}
|
|
|
|
/* Effectively do build_pointer_type, but don't cache this type,
|
|
since it might be temporary whereas the type it points to
|
|
might have been saved for inlining. */
|
|
/* Don't use REFERENCE_TYPE because dbx can't handle that. */
|
|
type = make_node (POINTER_TYPE);
|
|
TREE_TYPE (type) = TREE_TYPE (decl);
|
|
}
|
|
else if (GET_CODE (value) == MEM
|
|
&& ((GET_CODE (XEXP (value, 0)) == PLUS
|
|
&& GET_CODE (XEXP (XEXP (value, 0), 0)) == REG
|
|
&& GET_CODE (XEXP (XEXP (value, 0), 1)) == CONST_INT)
|
|
/* This is for variables which are at offset zero from
|
|
the frame pointer. This happens on the Alpha.
|
|
Non-frame pointer registers are excluded above. */
|
|
|| (GET_CODE (XEXP (value, 0)) == REG)))
|
|
{
|
|
/* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
|
|
or (MEM (REG...)). We want the value of that CONST_INT
|
|
or zero. */
|
|
PUT_SDB_DEF (name);
|
|
PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET (XEXP (value, 0)));
|
|
PUT_SDB_SCL (C_AUTO);
|
|
}
|
|
else
|
|
{
|
|
/* It is something we don't know how to represent for SDB. */
|
|
return;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
PUT_SDB_TYPE (plain_type (type));
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
|
|
/* Output SDB information for a top-level initialized variable
|
|
that has been delayed. */
|
|
|
|
static void
|
|
sdbout_toplevel_data (tree decl)
|
|
{
|
|
tree type = TREE_TYPE (decl);
|
|
|
|
if (DECL_IGNORED_P (decl))
|
|
return;
|
|
|
|
if (! (TREE_CODE (decl) == VAR_DECL
|
|
&& GET_CODE (DECL_RTL (decl)) == MEM
|
|
&& DECL_INITIAL (decl)))
|
|
abort ();
|
|
|
|
PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
|
|
PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
|
|
if (TREE_PUBLIC (decl))
|
|
{
|
|
PUT_SDB_SCL (C_EXT);
|
|
}
|
|
else
|
|
{
|
|
PUT_SDB_SCL (C_STAT);
|
|
}
|
|
PUT_SDB_TYPE (plain_type (type));
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
|
|
#ifdef SDB_ALLOW_FORWARD_REFERENCES
|
|
|
|
/* Machinery to record and output anonymous types. */
|
|
|
|
static void
|
|
sdbout_queue_anonymous_type (tree type)
|
|
{
|
|
anonymous_types = tree_cons (NULL_TREE, type, anonymous_types);
|
|
}
|
|
|
|
static void
|
|
sdbout_dequeue_anonymous_types (void)
|
|
{
|
|
tree types, link;
|
|
|
|
while (anonymous_types)
|
|
{
|
|
types = nreverse (anonymous_types);
|
|
anonymous_types = NULL_TREE;
|
|
|
|
for (link = types; link; link = TREE_CHAIN (link))
|
|
{
|
|
tree type = TREE_VALUE (link);
|
|
|
|
if (type && ! TREE_ASM_WRITTEN (type))
|
|
sdbout_one_type (type);
|
|
}
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/* Given a chain of ..._TYPE nodes, all of which have names,
|
|
output definitions of those names, as typedefs. */
|
|
|
|
void
|
|
sdbout_types (tree types)
|
|
{
|
|
tree link;
|
|
|
|
for (link = types; link; link = TREE_CHAIN (link))
|
|
sdbout_one_type (link);
|
|
|
|
#ifdef SDB_ALLOW_FORWARD_REFERENCES
|
|
sdbout_dequeue_anonymous_types ();
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
sdbout_type (tree type)
|
|
{
|
|
if (type == error_mark_node)
|
|
type = integer_type_node;
|
|
PUT_SDB_TYPE (plain_type (type));
|
|
}
|
|
|
|
/* Output types of the fields of type TYPE, if they are structs.
|
|
|
|
Formerly did not chase through pointer types, since that could be circular.
|
|
They must come before TYPE, since forward refs are not allowed.
|
|
Now james@bigtex.cactus.org says to try them. */
|
|
|
|
static void
|
|
sdbout_field_types (tree type)
|
|
{
|
|
tree tail;
|
|
|
|
for (tail = TYPE_FIELDS (type); tail; tail = TREE_CHAIN (tail))
|
|
/* This condition should match the one for emitting the actual
|
|
members below. */
|
|
if (TREE_CODE (tail) == FIELD_DECL
|
|
&& DECL_NAME (tail)
|
|
&& DECL_SIZE (tail)
|
|
&& host_integerp (DECL_SIZE (tail), 1)
|
|
&& host_integerp (bit_position (tail), 0))
|
|
{
|
|
if (POINTER_TYPE_P (TREE_TYPE (tail)))
|
|
sdbout_one_type (TREE_TYPE (TREE_TYPE (tail)));
|
|
else
|
|
sdbout_one_type (TREE_TYPE (tail));
|
|
}
|
|
}
|
|
|
|
/* Use this to put out the top level defined record and union types
|
|
for later reference. If this is a struct with a name, then put that
|
|
name out. Other unnamed structs will have .xxfake labels generated so
|
|
that they may be referred to later.
|
|
The label will be stored in the KNOWN_TYPE_TAG slot of a type.
|
|
It may NOT be called recursively. */
|
|
|
|
static void
|
|
sdbout_one_type (tree type)
|
|
{
|
|
if (current_function_decl != NULL_TREE
|
|
&& DECL_SECTION_NAME (current_function_decl) != NULL_TREE)
|
|
; /* Don't change section amid function. */
|
|
else
|
|
text_section ();
|
|
|
|
switch (TREE_CODE (type))
|
|
{
|
|
case RECORD_TYPE:
|
|
case UNION_TYPE:
|
|
case QUAL_UNION_TYPE:
|
|
case ENUMERAL_TYPE:
|
|
type = TYPE_MAIN_VARIANT (type);
|
|
/* Don't output a type twice. */
|
|
if (TREE_ASM_WRITTEN (type))
|
|
/* James said test TREE_ASM_BEING_WRITTEN here. */
|
|
return;
|
|
|
|
/* Output nothing if type is not yet defined. */
|
|
if (!COMPLETE_TYPE_P (type))
|
|
return;
|
|
|
|
TREE_ASM_WRITTEN (type) = 1;
|
|
|
|
/* This is reputed to cause trouble with the following case,
|
|
but perhaps checking TYPE_SIZE above will fix it. */
|
|
|
|
/* Here is a testcase:
|
|
|
|
struct foo {
|
|
struct badstr *bbb;
|
|
} forwardref;
|
|
|
|
typedef struct intermediate {
|
|
int aaaa;
|
|
} intermediate_ref;
|
|
|
|
typedef struct badstr {
|
|
int ccccc;
|
|
} badtype; */
|
|
|
|
/* This change, which ought to make better output,
|
|
used to make the COFF assembler unhappy.
|
|
Changes involving KNOWN_TYPE_TAG may fix the problem. */
|
|
/* Before really doing anything, output types we want to refer to. */
|
|
/* Note that in version 1 the following two lines
|
|
are not used if forward references are in use. */
|
|
if (TREE_CODE (type) != ENUMERAL_TYPE)
|
|
sdbout_field_types (type);
|
|
|
|
/* Output a structure type. */
|
|
{
|
|
int size = int_size_in_bytes (type);
|
|
int member_scl = 0;
|
|
tree tem;
|
|
int i, n_baseclasses = 0;
|
|
|
|
/* Record the type tag, but not in its permanent place just yet. */
|
|
sdbout_record_type_name (type);
|
|
|
|
PUT_SDB_DEF (KNOWN_TYPE_TAG (type));
|
|
|
|
switch (TREE_CODE (type))
|
|
{
|
|
case UNION_TYPE:
|
|
case QUAL_UNION_TYPE:
|
|
PUT_SDB_SCL (C_UNTAG);
|
|
PUT_SDB_TYPE (T_UNION);
|
|
member_scl = C_MOU;
|
|
break;
|
|
|
|
case RECORD_TYPE:
|
|
PUT_SDB_SCL (C_STRTAG);
|
|
PUT_SDB_TYPE (T_STRUCT);
|
|
member_scl = C_MOS;
|
|
break;
|
|
|
|
case ENUMERAL_TYPE:
|
|
PUT_SDB_SCL (C_ENTAG);
|
|
PUT_SDB_TYPE (T_ENUM);
|
|
member_scl = C_MOE;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
PUT_SDB_SIZE (size);
|
|
PUT_SDB_ENDEF;
|
|
|
|
/* Print out the base class information with fields
|
|
named after the types they hold. */
|
|
/* This is only relevant to aggregate types. TYPE_BINFO is used
|
|
for other purposes in an ENUMERAL_TYPE, so we must exclude that
|
|
case. */
|
|
if (TREE_CODE (type) != ENUMERAL_TYPE)
|
|
{
|
|
if (TYPE_BINFO (type)
|
|
&& TYPE_BINFO_BASETYPES (type))
|
|
n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
|
|
for (i = 0; i < n_baseclasses; i++)
|
|
{
|
|
tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)),
|
|
i);
|
|
tree child_type = BINFO_TYPE (child);
|
|
tree child_type_name;
|
|
if (TYPE_NAME (child_type) == 0)
|
|
continue;
|
|
if (TREE_CODE (TYPE_NAME (child_type)) == IDENTIFIER_NODE)
|
|
child_type_name = TYPE_NAME (child_type);
|
|
else if (TREE_CODE (TYPE_NAME (child_type)) == TYPE_DECL)
|
|
{
|
|
child_type_name = DECL_NAME (TYPE_NAME (child_type));
|
|
if (child_type_name && template_name_p (child_type_name))
|
|
child_type_name
|
|
= DECL_ASSEMBLER_NAME (TYPE_NAME (child_type));
|
|
}
|
|
else
|
|
continue;
|
|
|
|
PUT_SDB_DEF (IDENTIFIER_POINTER (child_type_name));
|
|
PUT_SDB_INT_VAL (tree_low_cst (BINFO_OFFSET (child), 0));
|
|
PUT_SDB_SCL (member_scl);
|
|
sdbout_type (BINFO_TYPE (child));
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
}
|
|
|
|
/* Output the individual fields. */
|
|
|
|
if (TREE_CODE (type) == ENUMERAL_TYPE)
|
|
{
|
|
for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
|
|
if (host_integerp (TREE_VALUE (tem), 0))
|
|
{
|
|
PUT_SDB_DEF (IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
|
|
PUT_SDB_INT_VAL (tree_low_cst (TREE_VALUE (tem), 0));
|
|
PUT_SDB_SCL (C_MOE);
|
|
PUT_SDB_TYPE (T_MOE);
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
}
|
|
else /* record or union type */
|
|
for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
|
|
/* Output the name, type, position (in bits), size (in bits)
|
|
of each field. */
|
|
|
|
/* Omit here the nameless fields that are used to skip bits.
|
|
Also omit fields with variable size or position.
|
|
Also omit non FIELD_DECL nodes that GNU C++ may put here. */
|
|
if (TREE_CODE (tem) == FIELD_DECL
|
|
&& DECL_NAME (tem)
|
|
&& DECL_SIZE (tem)
|
|
&& host_integerp (DECL_SIZE (tem), 1)
|
|
&& host_integerp (bit_position (tem), 0))
|
|
{
|
|
const char *name;
|
|
|
|
name = IDENTIFIER_POINTER (DECL_NAME (tem));
|
|
PUT_SDB_DEF (name);
|
|
if (DECL_BIT_FIELD_TYPE (tem))
|
|
{
|
|
PUT_SDB_INT_VAL (int_bit_position (tem));
|
|
PUT_SDB_SCL (C_FIELD);
|
|
sdbout_type (DECL_BIT_FIELD_TYPE (tem));
|
|
PUT_SDB_SIZE (tree_low_cst (DECL_SIZE (tem), 1));
|
|
}
|
|
else
|
|
{
|
|
PUT_SDB_INT_VAL (int_bit_position (tem) / BITS_PER_UNIT);
|
|
PUT_SDB_SCL (member_scl);
|
|
sdbout_type (TREE_TYPE (tem));
|
|
}
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
/* Output end of a structure,union, or enumeral definition. */
|
|
|
|
PUT_SDB_PLAIN_DEF ("eos");
|
|
PUT_SDB_INT_VAL (size);
|
|
PUT_SDB_SCL (C_EOS);
|
|
PUT_SDB_TAG (KNOWN_TYPE_TAG (type));
|
|
PUT_SDB_SIZE (size);
|
|
PUT_SDB_ENDEF;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* The following two functions output definitions of function parameters.
|
|
Each parameter gets a definition locating it in the parameter list.
|
|
Each parameter that is a register variable gets a second definition
|
|
locating it in the register.
|
|
|
|
Printing or argument lists in gdb uses the definitions that
|
|
locate in the parameter list. But reference to the variable in
|
|
expressions uses preferentially the definition as a register. */
|
|
|
|
/* Output definitions, referring to storage in the parmlist,
|
|
of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
|
|
|
|
static void
|
|
sdbout_parms (tree parms)
|
|
{
|
|
for (; parms; parms = TREE_CHAIN (parms))
|
|
if (DECL_NAME (parms))
|
|
{
|
|
int current_sym_value = 0;
|
|
const char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
|
|
|
|
if (name == 0 || *name == 0)
|
|
name = gen_fake_label ();
|
|
|
|
/* Perform any necessary register eliminations on the parameter's rtl,
|
|
so that the debugging output will be accurate. */
|
|
DECL_INCOMING_RTL (parms)
|
|
= eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
|
|
SET_DECL_RTL (parms,
|
|
eliminate_regs (DECL_RTL (parms), 0, NULL_RTX));
|
|
|
|
if (PARM_PASSED_IN_MEMORY (parms))
|
|
{
|
|
rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
|
|
tree type;
|
|
|
|
/* ??? Here we assume that the parm address is indexed
|
|
off the frame pointer or arg pointer.
|
|
If that is not true, we produce meaningless results,
|
|
but do not crash. */
|
|
if (GET_CODE (addr) == PLUS
|
|
&& GET_CODE (XEXP (addr, 1)) == CONST_INT)
|
|
current_sym_value = INTVAL (XEXP (addr, 1));
|
|
else
|
|
current_sym_value = 0;
|
|
|
|
if (GET_CODE (DECL_RTL (parms)) == REG
|
|
&& REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
|
|
type = DECL_ARG_TYPE (parms);
|
|
else
|
|
{
|
|
int original_sym_value = current_sym_value;
|
|
|
|
/* This is the case where the parm is passed as an int or
|
|
double and it is converted to a char, short or float
|
|
and stored back in the parmlist. In this case, describe
|
|
the parm with the variable's declared type, and adjust
|
|
the address if the least significant bytes (which we are
|
|
using) are not the first ones. */
|
|
if (BYTES_BIG_ENDIAN
|
|
&& TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
|
|
current_sym_value +=
|
|
(GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
|
|
- GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
|
|
|
|
if (GET_CODE (DECL_RTL (parms)) == MEM
|
|
&& GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
|
|
&& (GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1))
|
|
== CONST_INT)
|
|
&& (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1))
|
|
== current_sym_value))
|
|
type = TREE_TYPE (parms);
|
|
else
|
|
{
|
|
current_sym_value = original_sym_value;
|
|
type = DECL_ARG_TYPE (parms);
|
|
}
|
|
}
|
|
|
|
PUT_SDB_DEF (name);
|
|
PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value, addr));
|
|
PUT_SDB_SCL (C_ARG);
|
|
PUT_SDB_TYPE (plain_type (type));
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
else if (GET_CODE (DECL_RTL (parms)) == REG)
|
|
{
|
|
rtx best_rtl;
|
|
/* Parm passed in registers and lives in registers or nowhere. */
|
|
|
|
/* If parm lives in a register, use that register;
|
|
pretend the parm was passed there. It would be more consistent
|
|
to describe the register where the parm was passed,
|
|
but in practice that register usually holds something else. */
|
|
if (REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
|
|
best_rtl = DECL_RTL (parms);
|
|
/* If the parm lives nowhere,
|
|
use the register where it was passed. */
|
|
else
|
|
best_rtl = DECL_INCOMING_RTL (parms);
|
|
|
|
PUT_SDB_DEF (name);
|
|
PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (best_rtl)));
|
|
PUT_SDB_SCL (C_REGPARM);
|
|
PUT_SDB_TYPE (plain_type (TREE_TYPE (parms)));
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
else if (GET_CODE (DECL_RTL (parms)) == MEM
|
|
&& XEXP (DECL_RTL (parms), 0) != const0_rtx)
|
|
{
|
|
/* Parm was passed in registers but lives on the stack. */
|
|
|
|
/* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
|
|
in which case we want the value of that CONST_INT,
|
|
or (MEM (REG ...)) or (MEM (MEM ...)),
|
|
in which case we use a value of zero. */
|
|
if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
|
|
|| GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
|
|
current_sym_value = 0;
|
|
else
|
|
current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
|
|
|
|
/* Again, this assumes the offset is based on the arg pointer. */
|
|
PUT_SDB_DEF (name);
|
|
PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value,
|
|
XEXP (DECL_RTL (parms), 0)));
|
|
PUT_SDB_SCL (C_ARG);
|
|
PUT_SDB_TYPE (plain_type (TREE_TYPE (parms)));
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Output definitions for the places where parms live during the function,
|
|
when different from where they were passed, when the parms were passed
|
|
in memory.
|
|
|
|
It is not useful to do this for parms passed in registers
|
|
that live during the function in different registers, because it is
|
|
impossible to look in the passed register for the passed value,
|
|
so we use the within-the-function register to begin with.
|
|
|
|
PARMS is a chain of PARM_DECL nodes. */
|
|
|
|
static void
|
|
sdbout_reg_parms (tree parms)
|
|
{
|
|
for (; parms; parms = TREE_CHAIN (parms))
|
|
if (DECL_NAME (parms))
|
|
{
|
|
const char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
|
|
|
|
/* Report parms that live in registers during the function
|
|
but were passed in memory. */
|
|
if (GET_CODE (DECL_RTL (parms)) == REG
|
|
&& REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
|
|
&& PARM_PASSED_IN_MEMORY (parms))
|
|
{
|
|
if (name == 0 || *name == 0)
|
|
name = gen_fake_label ();
|
|
PUT_SDB_DEF (name);
|
|
PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (DECL_RTL (parms))));
|
|
PUT_SDB_SCL (C_REG);
|
|
PUT_SDB_TYPE (plain_type (TREE_TYPE (parms)));
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
/* Report parms that live in memory but not where they were passed. */
|
|
else if (GET_CODE (DECL_RTL (parms)) == MEM
|
|
&& GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
|
|
&& GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
|
|
&& PARM_PASSED_IN_MEMORY (parms)
|
|
&& ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
|
|
{
|
|
#if 0 /* ??? It is not clear yet what should replace this. */
|
|
int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
|
|
/* A parm declared char is really passed as an int,
|
|
so it occupies the least significant bytes.
|
|
On a big-endian machine those are not the low-numbered ones. */
|
|
if (BYTES_BIG_ENDIAN
|
|
&& offset != -1
|
|
&& TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
|
|
offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
|
|
- GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
|
|
if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
|
|
#endif
|
|
{
|
|
if (name == 0 || *name == 0)
|
|
name = gen_fake_label ();
|
|
PUT_SDB_DEF (name);
|
|
PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
|
|
(XEXP (DECL_RTL (parms), 0)));
|
|
PUT_SDB_SCL (C_AUTO);
|
|
PUT_SDB_TYPE (plain_type (TREE_TYPE (parms)));
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Output debug information for a global DECL. Called from toplev.c
|
|
after compilation proper has finished. */
|
|
|
|
static void
|
|
sdbout_global_decl (tree decl)
|
|
{
|
|
if (TREE_CODE (decl) == VAR_DECL
|
|
&& !DECL_EXTERNAL (decl)
|
|
&& DECL_RTL_SET_P (decl))
|
|
{
|
|
/* The COFF linker can move initialized global vars to the end.
|
|
And that can screw up the symbol ordering. Defer those for
|
|
sdbout_finish (). */
|
|
if (!DECL_INITIAL (decl) || !TREE_PUBLIC (decl))
|
|
sdbout_symbol (decl, 0);
|
|
|
|
/* Output COFF information for non-global file-scope initialized
|
|
variables. */
|
|
if (DECL_INITIAL (decl) && GET_CODE (DECL_RTL (decl)) == MEM)
|
|
sdbout_toplevel_data (decl);
|
|
}
|
|
}
|
|
|
|
/* Output initialized global vars at the end, in the order of
|
|
definition. See comment in sdbout_global_decl. */
|
|
|
|
static void
|
|
sdbout_finish (const char *main_filename ATTRIBUTE_UNUSED)
|
|
{
|
|
tree decl = (*lang_hooks.decls.getdecls) ();
|
|
unsigned int len = list_length (decl);
|
|
tree *vec = xmalloc (sizeof (tree) * len);
|
|
unsigned int i;
|
|
|
|
/* Process the decls in reverse order--earliest first. Put them
|
|
into VEC from back to front, then take out from front. */
|
|
|
|
for (i = 0; i < len; i++, decl = TREE_CHAIN (decl))
|
|
vec[len - i - 1] = decl;
|
|
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
decl = vec[i];
|
|
if (TREE_CODE (decl) == VAR_DECL
|
|
&& ! DECL_EXTERNAL (decl)
|
|
&& DECL_INITIAL (decl)
|
|
&& TREE_PUBLIC (decl)
|
|
&& DECL_RTL_SET_P (decl))
|
|
sdbout_symbol (decl, 0);
|
|
}
|
|
|
|
free (vec);
|
|
}
|
|
|
|
/* Describe the beginning of an internal block within a function.
|
|
Also output descriptions of variables defined in this block.
|
|
|
|
N is the number of the block, by order of beginning, counting from 1,
|
|
and not counting the outermost (function top-level) block.
|
|
The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
|
|
if the count starts at 0 for the outermost one. */
|
|
|
|
static void
|
|
sdbout_begin_block (unsigned int line, unsigned int n)
|
|
{
|
|
tree decl = current_function_decl;
|
|
MAKE_LINE_SAFE (line);
|
|
|
|
/* The SCO compiler does not emit a separate block for the function level
|
|
scope, so we avoid it here also. However, mips ECOFF compilers do emit
|
|
a separate block, so we retain it when MIPS_DEBUGGING_INFO is defined. */
|
|
#ifndef MIPS_DEBUGGING_INFO
|
|
if (n != 1)
|
|
#endif
|
|
PUT_SDB_BLOCK_START (line - sdb_begin_function_line);
|
|
|
|
if (n == 1)
|
|
{
|
|
/* Include the outermost BLOCK's variables in block 1. */
|
|
do_block = BLOCK_NUMBER (DECL_INITIAL (decl));
|
|
sdbout_block (DECL_INITIAL (decl));
|
|
}
|
|
/* If -g1, suppress all the internal symbols of functions
|
|
except for arguments. */
|
|
if (debug_info_level != DINFO_LEVEL_TERSE)
|
|
{
|
|
do_block = n;
|
|
sdbout_block (DECL_INITIAL (decl));
|
|
}
|
|
|
|
#ifdef SDB_ALLOW_FORWARD_REFERENCES
|
|
sdbout_dequeue_anonymous_types ();
|
|
#endif
|
|
}
|
|
|
|
/* Describe the end line-number of an internal block within a function. */
|
|
|
|
static void
|
|
sdbout_end_block (unsigned int line, unsigned int n ATTRIBUTE_UNUSED)
|
|
{
|
|
MAKE_LINE_SAFE (line);
|
|
|
|
/* The SCO compiler does not emit a separate block for the function level
|
|
scope, so we avoid it here also. However, mips ECOFF compilers do emit
|
|
a separate block, so we retain it when MIPS_DEBUGGING_INFO is defined. */
|
|
#ifndef MIPS_DEBUGGING_INFO
|
|
if (n != 1)
|
|
#endif
|
|
PUT_SDB_BLOCK_END (line - sdb_begin_function_line);
|
|
}
|
|
|
|
/* Output a line number symbol entry for source file FILENAME and line
|
|
number LINE. */
|
|
|
|
static void
|
|
sdbout_source_line (unsigned int line, const char *filename ATTRIBUTE_UNUSED)
|
|
{
|
|
/* COFF relative line numbers must be positive. */
|
|
if ((int) line > sdb_begin_function_line)
|
|
{
|
|
#ifdef ASM_OUTPUT_SOURCE_LINE
|
|
sdbout_source_line_counter += 1;
|
|
ASM_OUTPUT_SOURCE_LINE (asm_out_file, line, sdbout_source_line_counter);
|
|
#else
|
|
fprintf (asm_out_file, "\t.ln\t%d\n",
|
|
((sdb_begin_function_line > -1)
|
|
? line - sdb_begin_function_line : 1));
|
|
#endif
|
|
}
|
|
}
|
|
|
|
/* Output sdb info for the current function name.
|
|
Called from assemble_start_function. */
|
|
|
|
static void
|
|
sdbout_begin_function (tree decl ATTRIBUTE_UNUSED)
|
|
{
|
|
sdbout_symbol (current_function_decl, 0);
|
|
}
|
|
|
|
/* Called at beginning of function body (before or after prologue,
|
|
depending on MIPS_DEBUGGING_INFO). Record the function's starting
|
|
line number, so we can output relative line numbers for the other
|
|
lines. Describe beginning of outermost block. Also describe the
|
|
parameter list. */
|
|
|
|
#ifndef MIPS_DEBUGGING_INFO
|
|
static void
|
|
sdbout_begin_prologue (unsigned int line, const char *file ATTRIBUTE_UNUSED)
|
|
{
|
|
sdbout_end_prologue (line, file);
|
|
}
|
|
#endif
|
|
|
|
static void
|
|
sdbout_end_prologue (unsigned int line, const char *file ATTRIBUTE_UNUSED)
|
|
{
|
|
sdb_begin_function_line = line - 1;
|
|
PUT_SDB_FUNCTION_START (line);
|
|
sdbout_parms (DECL_ARGUMENTS (current_function_decl));
|
|
sdbout_reg_parms (DECL_ARGUMENTS (current_function_decl));
|
|
}
|
|
|
|
/* Called at end of function (before epilogue).
|
|
Describe end of outermost block. */
|
|
|
|
static void
|
|
sdbout_end_function (unsigned int line)
|
|
{
|
|
#ifdef SDB_ALLOW_FORWARD_REFERENCES
|
|
sdbout_dequeue_anonymous_types ();
|
|
#endif
|
|
|
|
MAKE_LINE_SAFE (line);
|
|
PUT_SDB_FUNCTION_END (line - sdb_begin_function_line);
|
|
|
|
/* Indicate we are between functions, for line-number output. */
|
|
sdb_begin_function_line = -1;
|
|
}
|
|
|
|
/* Output sdb info for the absolute end of a function.
|
|
Called after the epilogue is output. */
|
|
|
|
static void
|
|
sdbout_end_epilogue (unsigned int line ATTRIBUTE_UNUSED,
|
|
const char *file ATTRIBUTE_UNUSED)
|
|
{
|
|
const char *const name ATTRIBUTE_UNUSED
|
|
= IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl));
|
|
|
|
#ifdef PUT_SDB_EPILOGUE_END
|
|
PUT_SDB_EPILOGUE_END (name);
|
|
#else
|
|
fprintf (asm_out_file, "\t.def\t");
|
|
assemble_name (asm_out_file, name);
|
|
fprintf (asm_out_file, "%s\t.val\t.%s\t.scl\t-1%s\t.endef\n",
|
|
SDB_DELIM, SDB_DELIM, SDB_DELIM);
|
|
#endif
|
|
}
|
|
|
|
/* Output sdb info for the given label. Called only if LABEL_NAME (insn)
|
|
is present. */
|
|
|
|
static void
|
|
sdbout_label (rtx insn)
|
|
{
|
|
PUT_SDB_DEF (LABEL_NAME (insn));
|
|
PUT_SDB_VAL (insn);
|
|
PUT_SDB_SCL (C_LABEL);
|
|
PUT_SDB_TYPE (T_NULL);
|
|
PUT_SDB_ENDEF;
|
|
}
|
|
|
|
/* Change to reading from a new source file. */
|
|
|
|
static void
|
|
sdbout_start_source_file (unsigned int line ATTRIBUTE_UNUSED,
|
|
const char *filename ATTRIBUTE_UNUSED)
|
|
{
|
|
#ifdef MIPS_DEBUGGING_INFO
|
|
struct sdb_file *n = xmalloc (sizeof *n);
|
|
|
|
n->next = current_file;
|
|
n->name = filename;
|
|
current_file = n;
|
|
PUT_SDB_SRC_FILE (filename);
|
|
#endif
|
|
}
|
|
|
|
/* Revert to reading a previous source file. */
|
|
|
|
static void
|
|
sdbout_end_source_file (unsigned int line ATTRIBUTE_UNUSED)
|
|
{
|
|
#ifdef MIPS_DEBUGGING_INFO
|
|
struct sdb_file *next;
|
|
|
|
next = current_file->next;
|
|
free (current_file);
|
|
current_file = next;
|
|
PUT_SDB_SRC_FILE (current_file->name);
|
|
#endif
|
|
}
|
|
|
|
/* Set up for SDB output at the start of compilation. */
|
|
|
|
static void
|
|
sdbout_init (const char *input_file_name ATTRIBUTE_UNUSED)
|
|
{
|
|
#ifdef MIPS_DEBUGGING_INFO
|
|
current_file = xmalloc (sizeof *current_file);
|
|
current_file->next = NULL;
|
|
current_file->name = input_file_name;
|
|
#endif
|
|
}
|
|
|
|
#else /* SDB_DEBUGGING_INFO */
|
|
|
|
/* This should never be used, but its address is needed for comparisons. */
|
|
const struct gcc_debug_hooks sdb_debug_hooks;
|
|
|
|
#endif /* SDB_DEBUGGING_INFO */
|
|
|
|
#include "gt-sdbout.h"
|