/*
  Copyright (C) 2000,2002,2004,2005 Silicon Graphics, Inc.  All Rights Reserved.
  Portions Copyright (C) 2007-2018 David Anderson. All Rights Reserved.
  Portions Copyright 2007-2010 Sun Microsystems, Inc. All rights reserved.
  Portions Copyright 2012 SN Systems Ltd. All rights reserved.

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it would be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

  Further, this software is distributed without any warranty that it is
  free of the rightful claim of any third person regarding infringement
  or the like.  Any license provided herein, whether implied or
  otherwise, applies only to this software file.  Patent licenses, if
  any, provided herein do not apply to combinations of this program with
  other software, or any other product whatsoever.

  You should have received a copy of the GNU General Public License along
  with this program; if not, write the Free Software Foundation, Inc., 51
  Franklin Street - Fifth Floor, Boston MA 02110-1301, USA.

*/

/* The address of the Free Software Foundation is
   Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   Boston, MA 02110-1301, USA.
   SGI has moved from the Crittenden Lane address.
*/

#include "globals.h"

/* for 'open' */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <limits.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h> /* for dup2() */
#endif

#include "makename.h"
#include "macrocheck.h"
#include "dwconf.h"
#include "common.h"
#include "helpertree.h"
#include "esb.h"                /* For flexible string buffer. */
#include "sanitized.h"
#include "tag_common.h"
#include "libdwarf_version.h" /* for DW_VERSION_DATE_STR */

#include "command_options.h"
#include "compiler_info.h"

#ifndef O_RDONLY
/*  This is for a Windows environment */
# define O_RDONLY _O_RDONLY
#endif

#ifdef _O_BINARY
/*  This is for a Windows environment */
#define O_BINARY _O_BINARY
#else
# ifndef O_BINARY
# define O_BINARY 0  /* So it does nothing in Linux/Unix */
# endif
#endif /* O_BINARY */

#ifdef HAVE_ELF_OPEN
extern int elf_open(const char *name,int mode);
#endif /* HAVE_ELF_OPEN */

#define BYTES_PER_INSTRUCTION 4

/*  The type of Bucket. */
#define KIND_RANGES_INFO       1
#define KIND_SECTIONS_INFO     2
#define KIND_VISITED_INFO      3

/* Build section information */
void build_linkonce_info(Dwarf_Debug dbg);

struct glflags_s glflags;

/* Functions used to manage the unique errors table */
static void allocate_unique_errors_table(void);
static void release_unique_errors_table(void);
#ifdef TESTING
static void dump_unique_errors_table(void);
#endif
static boolean add_to_unique_errors_table(char * error_text);

static struct esb_s esb_short_cu_name;
static struct esb_s esb_long_cu_name;
static struct esb_s dwarf_error_line;

static int process_one_file(Elf * elf, Elf *elftied,
    const char * file_name,
    const char * tied_file_name,
    int archive,
    struct dwconf_s *conf);

static int
open_a_file(const char * name)
{
    /* Set to a file number that cannot be legal. */
    int f = -1;

#if HAVE_ELF_OPEN
    /*  It is not possible to share file handles
        between applications or DLLs. Each application has its own
        file-handle table. For two applications to use the same file
        using a DLL, they must both open the file individually.
        Let the 'libelf' dll open and close the file.  */
    f = elf_open(name, O_RDONLY | O_BINARY);
#else
    f = open(name, O_RDONLY | O_BINARY);
#endif
    return f;

}
static void
close_a_file(int f)
{
    close(f);
}

static int
is_it_known_elf_header(Elf *elf)
{
    Elf32_Ehdr *eh32;

    eh32 = elf32_getehdr(elf);
    if (eh32) {
        return 1;
    }
#ifdef HAVE_ELF64_GETEHDR
    {
        Elf64_Ehdr *eh64;
        /* not a 32-bit obj */
        eh64 = elf64_getehdr(elf);
        if (eh64) {
            return 1;
        }
    }
#endif /* HAVE_ELF64_GETEHDR */
    /* Not something we can handle. */
    return 0;
}

/*
   Iterate through dwarf and print all info.
*/
int
main(int argc, char *argv[])
{
    const char * file_name = 0;
    const char * tied_file_name = 0;
    int f = 0;
    int ftied = 0;
    Elf_Cmd cmd = 0;
    Elf *arf = 0;
    Elf *elf = 0;
    Elf *elftied = 0;
    int archive = 0;
    int archmemnum = 0;

#ifdef _WIN32
    /*  Open the null device used during formatting printing */
    if (!esb_open_null_device()) {
        fprintf(stderr,"dwarfdump: Unable to open null device.\n");
        exit(FAILED);
    }
#endif /* _WIN32 */

    /*  Global flags initialization and esb-buffers construction. */
    init_global_flags();

    set_checks_off();
    esb_constructor(&esb_short_cu_name);
    esb_constructor(&esb_long_cu_name);
    esb_constructor(&dwarf_error_line);

#ifdef _WIN32
    /*  Often we redirect the output to a file, but we have found
        issues due to the buffering associated with stdout. Some issues
        were fixed just by the use of 'fflush', but the main issued
        remained.
        The stdout stream is buffered, so will only display what's in the
        buffer after it reaches a newline (or when it's told to). We have a
        few options to print immediately:
        - Print to stderr instead using fprintf.
        - Print to stdout and flush stdout whenever we need it to using fflush.
        - We can also disable buffering on stdout by using setbuf:
            setbuf(stdout,NULL);
            Make stdout unbuffered; this seems to work for all cases.
    */

    setbuf(stdout,NULL);
    /* Windows specific. */
    /* Redirect stderr to stdout. */
    /* Tried to use SetStdHandle, but it does not work properly. */
#if 0
    BOOL bbb = SetStdHandle(STD_ERROR_HANDLE,GetStdHandle(STD_OUTPUT_HANDLE));
    _iob[2]._file = _iob[1]._file;
    stderr->_file = stdout->_file;
#endif
    dup2(fileno(stdout),fileno(stderr));
#endif /* _WIN32 */

    print_version_details(argv[0],FALSE);

    (void) elf_version(EV_NONE);
    if (elf_version(EV_CURRENT) == EV_NONE) {
        (void) fprintf(stderr, "dwarfdump: libelf.a out of date.\n");
        exit(FAILED);
    }

    file_name = process_args(argc, argv);
    print_args(argc,argv);

    /*  Redirect stdout and stderr to an specific file */
    if (glflags.output_file) {
        if (NULL == freopen(glflags.output_file,"w",stdout)) {
            fprintf(stderr,
                "dwarfdump: Unable to redirect output to '%s'\n",
                glflags.output_file);
            exit(FAILED);
        }
        dup2(fileno(stdout),fileno(stderr));
        /* Record version and arguments in the output file */
        print_version_details(argv[0],TRUE);
        print_args(argc,argv);
    }

    /*  Because LibDwarf now generates some new warnings,
        allow the user to hide them by using command line options */
    {
        Dwarf_Cmdline_Options wcmd;
        /* The struct has just one field!. */
        wcmd.check_verbose_mode = glflags.gf_check_verbose_mode;
        dwarf_record_cmdline_options(wcmd);
    }


    f = open_a_file(file_name);
    if (f == -1) {
        fprintf(stderr, "%s ERROR:  can't open %s\n", glflags.program_name,
            file_name);
        return (FAILED);
    }

    cmd = ELF_C_READ;
    arf = elf_begin(f, cmd, (Elf *) 0);
    if (!arf) {
        fprintf(stderr, "%s ERROR:  Unable to obtain ELF descriptor for %s\n",
            glflags.program_name,
            file_name);
        return (FAILED);
    }
    if (elf_kind(arf) == ELF_K_AR) {
        /* This option is never tested and may not work sensibly. */
        archive = 1;
    }

    if (esb_string_len(glflags.config_file_tiedpath) > 0) {
        int isknown = 0;
        tied_file_name = esb_get_string(glflags.config_file_tiedpath);
        ftied = open_a_file(tied_file_name);
        if (ftied == -1) {
            fprintf(stderr, "%s ERROR:  can't open tied file %s\n",
                glflags.program_name,
                tied_file_name);
            return (FAILED);
        }
        elftied = elf_begin(ftied, cmd, (Elf *) 0);
        if (elf_kind(elftied) == ELF_K_AR) {
            fprintf(stderr, "%s ERROR:  tied file  %s is "
                "an archive. Not allowed. Giving up.\n",
                glflags.program_name,
                tied_file_name);
            return (FAILED);
        }
        isknown = is_it_known_elf_header(elftied);
        if (!isknown) {
            fprintf(stderr,
                "Cannot process tied file %s: unknown format\n",
                tied_file_name);
            return FAILED;
        }
    }


    while ((elf = elf_begin(f, cmd, arf)) != 0) {
        int isknown = is_it_known_elf_header(elf);
        if (!isknown) {
            /* not a 64-bit obj either! */
            /* dwarfdump is almost-quiet when not an object */
            if (archive) {
                Elf_Arhdr *mem_header = elf_getarhdr(elf);
                const char *memname =
                    (mem_header && mem_header->ar_name)?
                    mem_header->ar_name:"";

                /*  / and // archive entries are not archive
                    objects, but are not errors. */
                if (strcmp(memname,"/") && strcmp(memname,"//")) {
                    fprintf(stderr, "Can't process archive member "
                        "%d %s of %s: unknown format\n",
                        archmemnum,
                        sanitized(memname),
                        file_name);
                }
            } else {
                fprintf(stderr, "Can't process %s: unknown format\n",
                    file_name);
            }
            glflags.check_error = 1;
            cmd = elf_next(elf);
            elf_end(elf);
            continue;
        }
        memset(glflags.section_high_offsets_global,0,
            sizeof(*glflags.section_high_offsets_global));
            /*  If we are checking .debug_line, .debug_ranges, .debug_aranges,
            or .debug_loc build the tables containing
            the pairs LowPC and HighPC. It is safer  (and not
            expensive) to build all
            of these at once so mistakes in options do not lead
            to coredumps (like -ka -p did once). */
        if (glflags.gf_check_decl_file || glflags.gf_check_ranges ||
            glflags.gf_check_locations ||
            glflags.gf_do_check_dwarf ||
            glflags.gf_check_self_references) {
            glflags.pRangesInfo = AllocateBucketGroup(KIND_RANGES_INFO);
            glflags.pLinkonceInfo = AllocateBucketGroup(KIND_SECTIONS_INFO);
            glflags.pVisitedInfo = AllocateBucketGroup(KIND_VISITED_INFO);
        }

        /* Create the unique error table */
        if (glflags.gf_print_unique_errors) {
            allocate_unique_errors_table();
        }

        /* Allocate range array to be used by all CUs */
        if (glflags.gf_check_ranges) {
            allocate_range_array_info();
        }
        process_one_file(elf,elftied,
            file_name, tied_file_name,
            archive, glflags.config_file_data);
        /* Now cleanup object-specific allocations. */
        /* Trivial malloc space cleanup. */
        clean_up_syms_malloc_data();
        if (glflags.pRangesInfo) {
            ReleaseBucketGroup(glflags.pRangesInfo);
            glflags.pRangesInfo = 0;
        }
        if (glflags.pLinkonceInfo) {
            ReleaseBucketGroup(glflags.pLinkonceInfo);
            glflags.pLinkonceInfo = 0;
        }
        if (glflags.pVisitedInfo) {
            ReleaseBucketGroup(glflags.pVisitedInfo);
            glflags.pVisitedInfo = 0;
        }
        /* Release range array to be used by all CUs */
        if (glflags.gf_check_ranges) {
            release_range_array_info();
        }
        /* Delete the unique error set */
        if (glflags.gf_print_unique_errors) {
            release_unique_errors_table();
        }
        clean_up_compilers_detected();
        destruct_abbrev_array();
        cmd = elf_next(elf);
        elf_end(elf);
        archmemnum += 1;
    }
    elf_end(arf);
    if (elftied) {
        elf_end(elftied);
        elftied = 0;
    }

    /*  These cleanups only necessary once all
        objects processed. */
#ifdef HAVE_REGEX
    if (glflags.search_regex_text) {
        regfree(glflags.search_re);
    }
#endif
    makename_destructor();
    esb_destructor(&esb_long_cu_name);
    esb_destructor(&esb_short_cu_name);
    esb_destructor(&dwarf_error_line);
    sanitized_string_destructor();
    ranges_esb_string_destructor();

    /*  Global flags initialization and esb-buffers destruction. */
    reset_global_flags();

    close_a_file(f);

#ifdef _WIN32
    /* Close the null device used during formatting printing */
    esb_close_null_device();
#endif /* _WIN32 */

    /*  As the tool have reached this point, it means there are
        no internal errors and we should return an OKAY condition,
        regardless if the file being processed has errors. */
    return OKAY;
}

void
print_any_harmless_errors(Dwarf_Debug dbg)
{
#define LOCAL_PTR_ARY_COUNT 50
    /*  We do not need to initialize the local array,
        libdwarf does it. */
    const char *buf[LOCAL_PTR_ARY_COUNT];
    unsigned totalcount = 0;
    unsigned i = 0;
    unsigned printcount = 0;
    int res = dwarf_get_harmless_error_list(dbg,LOCAL_PTR_ARY_COUNT,buf,
        &totalcount);
    if (res == DW_DLV_NO_ENTRY) {
        return;
    }
    if (totalcount > 0) {
        printf("\n*** HARMLESS ERROR COUNT: %u ***\n",totalcount);
    }
    for (i = 0 ; buf[i]; ++i) {
        ++printcount;
        DWARF_CHECK_COUNT(harmless_result,1);
        DWARF_CHECK_ERROR(harmless_result,buf[i]);
    }
    if (totalcount > printcount) {
        /*harmless_result.checks += (totalcount - printcount); */
        DWARF_CHECK_COUNT(harmless_result,(totalcount - printcount));
        /*harmless_result.errors += (totalcount - printcount); */
        DWARF_ERROR_COUNT(harmless_result,(totalcount - printcount));
    }
}

static void
print_object_header(UNUSEDARG Elf *elf,
    Dwarf_Debug dbg)
{
    /* Check if header information is required */
    if (section_map_enabled(DW_HDR_HEADER)) {
#ifdef _WIN32
#ifdef HAVE_ELF32_GETEHDR
    /*  Standard libelf has no function generating the names of the
        encodings, but this libelf apparently does. */
    Elf_Ehdr_Literal eh_literals;
    Elf32_Ehdr *eh32;
#ifdef HAVE_ELF64_GETEHDR
    Elf64_Ehdr *eh64;
#endif /* HAVE_ELF64_GETEHDR */

    eh32 = elf32_getehdr(elf);
    if (eh32) {
        /* Get literal strings for header fields */
        elf32_gethdr_literals(eh32,&eh_literals);
        /* Print 32-bit obj header */
        printf("\nObject Header:\ne_ident:\n");
        printf("  File ID       = %s\n",eh_literals.e_ident_file_id);
        printf("  File class    = %02x (%s)\n",
            eh32->e_ident[EI_CLASS],eh_literals.e_ident_file_class);
        printf("  Data encoding = %02x (%s)\n",
            eh32->e_ident[EI_DATA],eh_literals.e_ident_data_encoding);
        printf("  File version  = %02x (%s)\n",
            eh32->e_ident[EI_VERSION],eh_literals.e_ident_file_version);
        printf("  OS ABI        = %02x (%s) (%s)\n",eh32->e_ident[EI_OSABI],
            eh_literals.e_ident_os_abi_s,eh_literals.e_ident_os_abi_l);
        printf("  ABI version   = %02x (%s)\n",
            eh32->e_ident[EI_ABIVERSION], eh_literals.e_ident_abi_version);
        printf("e_type     : 0x%x (%s)\n",
            eh32->e_type,eh_literals.e_type);
        printf("e_machine  : 0x%x (%s) (%s)\n",eh32->e_machine,
            eh_literals.e_machine_s,eh_literals.e_machine_l);
        printf("e_version  : 0x%x\n", eh32->e_version);
        printf("e_entry    : 0x%" DW_PR_XZEROS DW_PR_DUx "\n",eh32->e_entry);
        printf("e_phoff    : 0x%" DW_PR_XZEROS DW_PR_DUx "\n",eh32->e_phoff);
        printf("e_shoff    : 0x%" DW_PR_XZEROS DW_PR_DUx "\n",eh32->e_shoff);
        printf("e_flags    : 0x%x\n",eh32->e_flags);
        printf("e_ehsize   : 0x%x\n",eh32->e_ehsize);
        printf("e_phentsize: 0x%x\n",eh32->e_phentsize);
        printf("e_phnum    : 0x%x\n",eh32->e_phnum);
        printf("e_shentsize: 0x%x\n",eh32->e_shentsize);
        printf("e_shnum    : 0x%x\n",eh32->e_shnum);
        printf("e_shstrndx : 0x%x\n",eh32->e_shstrndx);
    }
    else {
#ifdef HAVE_ELF64_GETEHDR
        /* not a 32-bit obj */
        eh64 = elf64_getehdr(elf);
        if (eh64) {
            /* Get literal strings for header fields */
            elf64_gethdr_literals(eh64,&eh_literals);
            /* Print 64-bit obj header */
            printf("\nObject Header:\ne_ident:\n");
            printf("  File ID       = %s\n",eh_literals.e_ident_file_id);
            printf("  File class    = %02x (%s)\n",
                eh64->e_ident[EI_CLASS],eh_literals.e_ident_file_class);
            printf("  Data encoding = %02x (%s)\n",
                eh64->e_ident[EI_DATA],eh_literals.e_ident_data_encoding);
            printf("  File version  = %02x (%s)\n",
                eh64->e_ident[EI_VERSION],eh_literals.e_ident_file_version);
            printf("  OS ABI        = %02x (%s) (%s)\n",eh64->e_ident[EI_OSABI],
                eh_literals.e_ident_os_abi_s,eh_literals.e_ident_os_abi_l);
            printf("  ABI version   = %02x (%s)\n",
                eh64->e_ident[EI_ABIVERSION], eh_literals.e_ident_abi_version);
            printf("e_type     : 0x%x (%s)\n",
                eh64->e_type,eh_literals.e_type);
            printf("e_machine  : 0x%x (%s) (%s)\n",eh64->e_machine,
                eh_literals.e_machine_s,eh_literals.e_machine_l);
            printf("e_version  : 0x%x\n", eh64->e_version);
            printf("e_entry    : 0x%" DW_PR_XZEROS DW_PR_DUx "\n",eh64->e_entry);
            printf("e_phoff    : 0x%" DW_PR_XZEROS DW_PR_DUx "\n",eh64->e_phoff);
            printf("e_shoff    : 0x%" DW_PR_XZEROS DW_PR_DUx "\n",eh64->e_shoff);
            printf("e_flags    : 0x%x\n",eh64->e_flags);
            printf("e_ehsize   : 0x%x\n",eh64->e_ehsize);
            printf("e_phentsize: 0x%x\n",eh64->e_phentsize);
            printf("e_phnum    : 0x%x\n",eh64->e_phnum);
            printf("e_shentsize: 0x%x\n",eh64->e_shentsize);
            printf("e_shnum    : 0x%x\n",eh64->e_shnum);
            printf("e_shstrndx : 0x%x\n",eh64->e_shstrndx);
        }
#endif /* HAVE_ELF64_GETEHDR */
    }
#endif /* HAVE_ELF32_GETEHDR */
#endif /* _WIN32 */
    }
    /* Print basic section information is required */
    /* Mask only known sections (debug and text) bits */
    if (any_section_header_to_print()) {
        int nCount = 0;
        int section_index = 0;
        int res = 0;
        const char *section_name = NULL;
        Dwarf_Addr section_addr = 0;
        Dwarf_Unsigned section_size = 0;
        Dwarf_Error error = 0;
        boolean print_it = FALSE;
        Dwarf_Unsigned total_bytes = 0;
        int printed_sections = 0;

        /* Print section information (name, size, address). */
        nCount = dwarf_get_section_count(dbg);
        printf("\nInfo for %d sections:\n"
            "  Nro Index Address    Size(h)    Size(d)  Name\n",nCount);
        /* Ignore section with index=0 */
        for (section_index = 1; section_index < nCount; ++section_index) {
            res = dwarf_get_section_info_by_index(dbg,section_index,
                &section_name,
                &section_addr,
                &section_size,
                &error);
            if (res == DW_DLV_OK) {
                print_it = FALSE;
                /* Use original mapping */
                /* Check if the section name is a debug section */
                print_it = section_name_is_debug_and_wanted(section_name);
                if (print_it) {
                    ++printed_sections;
                    printf("  %3d "                         /* nro */
                        "0x%03x "                        /* index */
                        "0x%" DW_PR_XZEROS DW_PR_DUx " " /* address */
                        "0x%" DW_PR_XZEROS DW_PR_DUx " " /* size (hex) */
                        "%" DW_PR_XZEROS DW_PR_DUu " "   /* size (dec) */
                        "%s\n",                          /* name */
                        printed_sections,
                        section_index,
                        section_addr,
                        section_size, section_size,
                        section_name);
                    total_bytes += section_size;
                }
            }
        }
        printf("*** Summary: %" DW_PR_DUu " bytes for %d section(s) ***\n",
            total_bytes, printed_sections);
    }
}

/* Print a summary of search results */
static void
print_search_results(void)
{
    const char *search_type = 0;
    const char *search_text = 0;
    if (glflags.search_any_text) {
        search_type = "any";
        search_text = glflags.search_any_text;
    } else {
        if (glflags.search_match_text) {
            search_type = "match";
            search_text = glflags.search_match_text;
        } else {
            search_type = "regex";
            search_text = glflags.search_regex_text;
        }
    }
    fflush(stdout);
    fflush(stderr);
    printf("\nSearch type      : '%s'\n",search_type);
    printf("Pattern searched : '%s'\n",search_text);
    printf("Occurrences Found: %d\n",glflags.search_occurrences);
    fflush(stdout);
}

/* This is for dwarf_print_lines() */
static void
printf_callback_for_libdwarf(UNUSEDARG void *userdata,
    const char *data)
{
    printf("%s",data);
}


/*  Does not return on error. */
void
get_address_size_and_max(Dwarf_Debug dbg,
   Dwarf_Half * size,
   Dwarf_Addr * max,
   Dwarf_Error *aerr)
{
    int dres = 0;
    Dwarf_Half lsize = 4;
    /* Get address size and largest representable address */
    dres = dwarf_get_address_size(dbg,&lsize,aerr);
    if (dres != DW_DLV_OK) {
        print_error(dbg, "get_address_size()", dres, *aerr);
    }
    if(max) {
        *max = (lsize == 8 ) ? 0xffffffffffffffffULL : 0xffffffff;
    }
    if(size) {
        *size = lsize;
    }
}


/* dbg is often null when dbgtied was passed in. */
static void
dbgsetup(Dwarf_Debug dbg,struct dwconf_s *setup_config_file_data)
{
    if (!dbg) {
        return;
    }
    dwarf_set_frame_rule_initial_value(dbg,
        setup_config_file_data->cf_initial_rule_value);
    dwarf_set_frame_rule_table_size(dbg,
        setup_config_file_data->cf_table_entry_count);
    dwarf_set_frame_cfa_value(dbg,
        setup_config_file_data->cf_cfa_reg);
    dwarf_set_frame_same_value(dbg,
        setup_config_file_data->cf_same_val);
    dwarf_set_frame_undefined_value(dbg,
        setup_config_file_data->cf_undefined_val);
    if (setup_config_file_data->cf_address_size) {
        dwarf_set_default_address_size(dbg,
            setup_config_file_data->cf_address_size);
    }
    dwarf_set_harmless_error_list_size(dbg,50);
}

/*  Callable at any time, Sets section sizes with the sizes
    known as of the call.
    Repeat whenever about to  reference a size that might not
    have been set as of the last call. */
static void
set_global_section_sizes(Dwarf_Debug dbg)
{
    dwarf_get_section_max_offsets_c(dbg,
        &glflags.section_high_offsets_global->debug_info_size,
        &glflags.section_high_offsets_global->debug_abbrev_size,
        &glflags.section_high_offsets_global->debug_line_size,
        &glflags.section_high_offsets_global->debug_loc_size,
        &glflags.section_high_offsets_global->debug_aranges_size,
        &glflags.section_high_offsets_global->debug_macinfo_size,
        &glflags.section_high_offsets_global->debug_pubnames_size,
        &glflags.section_high_offsets_global->debug_str_size,
        &glflags.section_high_offsets_global->debug_frame_size,
        &glflags.section_high_offsets_global->debug_ranges_size,
        &glflags.section_high_offsets_global->debug_pubtypes_size,
        &glflags.section_high_offsets_global->debug_types_size,
        &glflags.section_high_offsets_global->debug_macro_size,
        &glflags.section_high_offsets_global->debug_str_offsets_size,
        &glflags.section_high_offsets_global->debug_sup_size,
        &glflags.section_high_offsets_global->debug_cu_index_size,
        &glflags.section_high_offsets_global->debug_tu_index_size);
}

/*
  Given a file which we know is an elf file, process
  the dwarf data.

*/
static int
process_one_file(Elf * elf,Elf *elftied,
    const char * file_name,
    const char * tied_file_name,
    int archive,
    struct dwconf_s *l_config_file_data)
{
    Dwarf_Debug dbg = 0;
    Dwarf_Debug dbgtied = 0;
    int dres = 0;
    struct Dwarf_Printf_Callback_Info_s printfcallbackdata;
    Dwarf_Half elf_address_size = 0;      /* Target pointer size */
    Dwarf_Error onef_err = 0;

    /*  If using a tied file group number should be 2 DW_GROUPNUMBER_DWO
        but in a dwp or separate-split-dwarf object then
        0 will find the .dwo data automatically. */
    dres = dwarf_elf_init_b(elf, DW_DLC_READ,glflags.group_number,
        NULL, NULL, &dbg, &onef_err);
    if (dres == DW_DLV_NO_ENTRY) {
        if (glflags.group_number > 0) {
            printf("No DWARF information present in %s "
                "for section group %d \n", file_name,glflags.group_number);
        } else {
            printf("No DWARF information present in %s\n",file_name);
        }
        return 0;
    }
    if (dres != DW_DLV_OK) {
        print_error(dbg, "dwarf_elf_init", dres, onef_err);
    }

    if (elftied) {
        /*  The tied file we define as group 1, BASE. */
        dres = dwarf_elf_init_b(elftied, DW_DLC_READ,
            DW_GROUPNUMBER_BASE, NULL, NULL, &dbgtied,
            &onef_err);
        if (dres == DW_DLV_NO_ENTRY) {
            printf("No DWARF information present in tied file: %s\n",
                tied_file_name);
            return 0;
        }
        if (dres != DW_DLV_OK) {
            print_error(dbg, "dwarf_elf_init on tied_file", dres, onef_err);
        }
    }

    memset(&printfcallbackdata,0,sizeof(printfcallbackdata));
    printfcallbackdata.dp_fptr = printf_callback_for_libdwarf;
    dwarf_register_printf_callback(dbg,&printfcallbackdata);
    if (dbgtied) {
        dwarf_register_printf_callback(dbgtied,&printfcallbackdata);
    }
    memset(&printfcallbackdata,0,sizeof(printfcallbackdata));



    if (archive) {
        Elf_Arhdr *mem_header = elf_getarhdr(elf);
        const char *memname =
            (mem_header && mem_header->ar_name)?
            mem_header->ar_name:"";

        printf("\narchive member \t%s\n",sanitized(memname));
    }
    dbgsetup(dbg,l_config_file_data);
    dbgsetup(dbgtied,l_config_file_data);
    get_address_size_and_max(dbg,&elf_address_size,0,&onef_err);

    /*  Ok for dbgtied to be NULL. */
    dres = dwarf_set_tied_dbg(dbg,dbgtied,&onef_err);
    if (dres != DW_DLV_OK) {
        print_error(dbg, "dwarf_set_tied_dbg() failed", dres, onef_err);
    }

    /* Get .text and .debug_ranges info if in check mode */
    if (glflags.gf_do_check_dwarf) {
        Dwarf_Addr lower = 0;
        Dwarf_Addr upper = 0;
        Dwarf_Unsigned size = 0;
        int res = 0;
        res = dwarf_get_section_info_by_name(dbg,".text",&lower,&size,&onef_err);
        if (DW_DLV_OK == res) {
            upper = lower + size;
        }

        /* Set limits for Ranges Information */
        if (glflags.pRangesInfo) {
            SetLimitsBucketGroup(glflags.pRangesInfo,lower,upper);
        }

        /* Build section information */
        build_linkonce_info(dbg);
    }

    if (glflags.gf_header_flag) {
        print_object_header(elf,dbg);
    }

    if (glflags.gf_section_groups_flag) {
        print_section_groups_data(dbg);
        /*  If groupnum > 2 this turns off some
            of the gf_flags here so we don't print
            section names of things we do not
            want to print. */
        update_section_flags_per_groups(dbg);
    }

    reset_overall_CU_error_data();
    if (glflags.gf_info_flag || glflags.gf_line_flag ||
        glflags.gf_types_flag ||
        glflags.gf_check_macros || glflags.gf_macinfo_flag ||
        glflags.gf_macro_flag ||
        glflags.gf_cu_name_flag || glflags.gf_search_is_on ||
        glflags.gf_producer_children_flag) {

        print_infos(dbg,TRUE);
        reset_overall_CU_error_data();
        print_infos(dbg,FALSE);
        if (glflags.gf_check_macros) {
            set_global_section_sizes(dbg);
            if(macro_check_tree) {
                /* Fake item representing end of section. */
                /* Length of the fake item is zero. */
                print_macro_statistics("DWARF5 .debug_macro",
                    &macro_check_tree,
                    glflags.section_high_offsets_global->debug_macro_size);
            }
            if(macinfo_check_tree) {
                /* Fake item representing end of section. */
                /* Length of the fake item is zero. */
                print_macro_statistics("DWARF2 .debug_macinfo",
                    &macinfo_check_tree,
                    glflags.section_high_offsets_global->debug_macinfo_size);
            }
        }
        clear_macro_statistics(&macro_check_tree);
        clear_macro_statistics(&macinfo_check_tree);
    }
    if (glflags.gf_gdbindex_flag) {
        reset_overall_CU_error_data();
        /*  By definition if gdb_index is present
            then "cu" and "tu" will not be. And vice versa.  */
        print_gdb_index(dbg);
        print_debugfission_index(dbg,"cu");
        print_debugfission_index(dbg,"tu");
    }
    if (glflags.gf_pubnames_flag) {
        reset_overall_CU_error_data();
        print_pubnames(dbg);
    }
    if (glflags.gf_loc_flag) {
        reset_overall_CU_error_data();
        print_locs(dbg);
    }
    if (glflags.gf_abbrev_flag) {
        reset_overall_CU_error_data();
        print_abbrevs(dbg);
    }
    if (glflags.gf_string_flag) {
        reset_overall_CU_error_data();
        print_strings(dbg);
    }
    if (glflags.gf_aranges_flag) {
        reset_overall_CU_error_data();
        print_aranges(dbg);
    }
    if (glflags.gf_ranges_flag) {
        reset_overall_CU_error_data();
        print_ranges(dbg);
    }
    if (glflags.gf_frame_flag || glflags.gf_eh_frame_flag) {
        reset_overall_CU_error_data();
        current_cu_die_for_print_frames = 0;
        print_frames(dbg, glflags.gf_frame_flag,
            glflags.gf_eh_frame_flag, l_config_file_data);
    }
    if (glflags.gf_static_func_flag) {
        reset_overall_CU_error_data();
        print_static_funcs(dbg);
    }
    if (glflags.gf_static_var_flag) {
        reset_overall_CU_error_data();
        print_static_vars(dbg);
    }
    /*  DWARF_PUBTYPES is the standard typenames dwarf section.
        SGI_TYPENAME is the same concept but is SGI specific ( it was
        defined 10 years before dwarf pubtypes). */

    if (glflags.gf_pubtypes_flag) {
        reset_overall_CU_error_data();
        print_types(dbg, DWARF_PUBTYPES);
        reset_overall_CU_error_data();
        print_types(dbg, SGI_TYPENAME);
    }
    if (glflags.gf_weakname_flag) {
        reset_overall_CU_error_data();
        print_weaknames(dbg);
    }
    if (glflags.gf_reloc_flag) {
        reset_overall_CU_error_data();
        print_relocinfo(dbg);
    }
    if (glflags.gf_debug_names_flag) {
        reset_overall_CU_error_data();
        print_debug_names(dbg);
    }

    /* Print search results */
    if (glflags.gf_search_print_results && glflags.gf_search_is_on) {
        print_search_results();
    }

    /* The right time to do this is unclear. But we need to do it. */
    if (glflags.gf_check_harmless) {
        print_any_harmless_errors(dbg);
    }

    /* Print error report only if errors have been detected */
    /* Print error report if the -kd option */
    print_checks_results();

    /*  Print the detailed attribute usage space
        and free the attributes_encoding data allocated. */
    if (glflags.gf_check_attr_encoding) {
        print_attributes_encoding(dbg);
    }

    /* Print the tags and attribute usage */
    if (glflags.gf_print_usage_tag_attr) {
        print_tag_attributes_usage(dbg);
    }

    if (glflags.gf_print_str_offsets) {
        /*  print the .debug_str_offsets section, if any. */
        print_str_offsets_section(dbg);
    }

    /*  Could finish dbg first. Either order ok. */
    if (dbgtied) {
        dres = dwarf_finish(dbgtied,&onef_err);
        if (dres != DW_DLV_OK) {
            print_error(dbg, "dwarf_finish on dbgtied", dres, onef_err);
        }
        dbgtied = 0;
    }
    groups_restore_subsidiary_flags();
    dres = dwarf_finish(dbg, &onef_err);
    if (dres != DW_DLV_OK) {
        print_error(dbg, "dwarf_finish", dres, onef_err);
        dbg = 0;
    }
    printf("\n");
    clean_up_syms_malloc_data();
    destruct_abbrev_array();
    esb_close_null_device();
    helpertree_clear_statistics(&helpertree_offsets_base_info);
    helpertree_clear_statistics(&helpertree_offsets_base_types);
    return 0;
}

/* Generic constants for debugging */
#define DUMP_RANGES_INFO            1   /* Dump RangesInfo Table. */
#define DUMP_LOCATION_SECTION_INFO  2   /* Dump Location (.debug_loc) Info. */
#define DUMP_RANGES_SECTION_INFO    3   /* Dump Ranges (.debug_ranges) Info. */
#define DUMP_LINKONCE_INFO          4   /* Dump Linkonce Table. */
#define DUMP_VISITED_INFO           5   /* Dump Visited Info. */

/* ARGSUSED */
static void
print_error_maybe_continue(UNUSEDARG Dwarf_Debug dbg,
    const char * msg,
    int dwarf_code,
    Dwarf_Error lerr,
    Dwarf_Bool do_continue)
{
    printf("\n");

    if (dwarf_code == DW_DLV_ERROR) {
        char * errmsg = dwarf_errmsg(lerr);

        /*  We now (April 2016) guarantee the
            error number is in
            the error string so we do not need to print
            the dwarf_errno() value to show the number. */
        if (do_continue) {
            printf( "%s ERROR:  %s:  %s. Attempting to continue.\n",
                glflags.program_name, msg, errmsg);
        } else {
            printf( "%s ERROR:  %s:  %s\n",
                glflags.program_name, msg, errmsg);
        }
    } else if (dwarf_code == DW_DLV_NO_ENTRY) {
        printf("%s NO ENTRY:  %s: \n", glflags.program_name, msg);
    } else if (dwarf_code == DW_DLV_OK) {
        printf("%s:  %s \n", glflags.program_name, msg);
    } else {
        printf("%s InternalError:  %s:  code %d\n",
            glflags.program_name, msg, dwarf_code);
    }

    /* Display compile unit name */
    PRINT_CU_INFO();
}

void
print_error(Dwarf_Debug dbg,
    const char * msg,
    int dwarf_code,
    Dwarf_Error lerr)
{
    print_error_maybe_continue(dbg,msg,dwarf_code,lerr,FALSE);
    if (dbg) {
        Dwarf_Error ignored_err = 0;
        /*  If dbg was never initialized dwarf_finish
            can do nothing useful. There is no
            global-state for libdwarf to clean up. */
        if (dwarf_code == DW_DLV_ERROR) {
            dwarf_dealloc(dbg,lerr,DW_DLA_ERROR);
        }
        dwarf_finish(dbg, &ignored_err);
    }
    exit(FAILED);
}
/* ARGSUSED */
void
print_error_and_continue(Dwarf_Debug dbg,
    const char * msg,
    int dwarf_code,
    Dwarf_Error lerr)
{
    print_error_maybe_continue(dbg,
        msg,dwarf_code,lerr,TRUE);
}

/*  Predicate function. Returns 'true' if the CU should
    be skipped as the DW_AT_name of the CU
    does not match the command-line-supplied
    cu name.  Else returns false.*/
boolean
should_skip_this_cu(Dwarf_Debug dbg, Dwarf_Die cu_die)
{
    Dwarf_Half tag = 0;
    Dwarf_Attribute attrib = 0;
    Dwarf_Half theform = 0;
    int dares = 0;
    int tres = 0;
    int fres = 0;
    Dwarf_Error lerr = 0;

    tres = dwarf_tag(cu_die, &tag, &lerr);
    if (tres != DW_DLV_OK) {
        print_error(dbg, "dwarf_tag in aranges",
            tres, lerr);
    }
    dares = dwarf_attr(cu_die, DW_AT_name, &attrib,
        &lerr);
    if (dares != DW_DLV_OK) {
        print_error(dbg, "dwarf_attr arange"
            " derived die has no name",
            dares, lerr);
        }
    fres = dwarf_whatform(attrib, &theform, &lerr);
    if (fres == DW_DLV_OK) {
        if (theform == DW_FORM_string
            || theform == DW_FORM_strp) {
            char * temps = 0;
            int sres = dwarf_formstring(attrib, &temps,
                &lerr);
            if (sres == DW_DLV_OK) {
                char *lcun = esb_get_string(glflags.cu_name);
                char *p = temps;
                if (lcun[0] != '/') {
                    p = strrchr(temps, '/');
                    if (p == NULL) {
                        p = temps;
                    } else {
                        p++;
                    }
                }
                /* Ignore case if Windows */
#if _WIN32
                if (stricmp(lcun, p)) {
                    /* skip this cu. */
                    return TRUE;
                }
#else
                if (strcmp(lcun, p)) {
                    /* skip this cu. */
                    return TRUE;
                }
#endif /* _WIN32 */

            } else {
                print_error(dbg,
                    "arange: string missing",
                    sres, lerr);
            }
        }
    } else {
        print_error(dbg,
            "dwarf_whatform unexpected value.",
            fres, lerr);
    }
    dwarf_dealloc(dbg, attrib, DW_DLA_ATTR);
    return FALSE;
}

/* Returns the cu of the CU. In case of error, give up, do not return. */
int
get_cu_name(Dwarf_Debug dbg, Dwarf_Die cu_die,
    Dwarf_Off dieprint_cu_offset,
    char * *short_name, char * *long_name)
{
    Dwarf_Attribute name_attr = 0;
    Dwarf_Error lerr = 0;
    int ares;

    ares = dwarf_attr(cu_die, DW_AT_name, &name_attr, &lerr);
    if (ares == DW_DLV_ERROR) {
        print_error(dbg, "hassattr on DW_AT_name", ares, lerr);
    } else {
        if (ares == DW_DLV_NO_ENTRY) {
            *short_name = "<unknown name>";
            *long_name = "<unknown name>";
        } else {
            /* DW_DLV_OK */
            /*  The string return is valid until the next call to this
                function; so if the caller needs to keep the returned
                string, the string must be copied (makename()). */
            char *filename = 0;

            esb_empty_string(&esb_long_cu_name);
            get_attr_value(dbg, DW_TAG_compile_unit,
                cu_die, dieprint_cu_offset,
                name_attr, NULL, 0, &esb_long_cu_name,
                0 /*show_form_used*/,0 /* verbose */);
            *long_name = esb_get_string(&esb_long_cu_name);
            /* Generate the short name (filename) */
            filename = strrchr(*long_name,'/');
            if (!filename) {
                filename = strrchr(*long_name,'\\');
            }
            if (filename) {
                ++filename;
            } else {
                filename = *long_name;
            }
            esb_empty_string(&esb_short_cu_name);
            esb_append(&esb_short_cu_name,filename);
            *short_name = esb_get_string(&esb_short_cu_name);
        }
    }
    dwarf_dealloc(dbg, name_attr, DW_DLA_ATTR);
    return ares;
}

/*  Returns the producer of the CU
    Caller must ensure producernameout is
    a valid, constructed, empty esb_s instance before calling.
    Never returns DW_DLV_ERROR.  */
int
get_producer_name(Dwarf_Debug dbg, Dwarf_Die cu_die,
    Dwarf_Off dieprint_cu_offset,
    struct esb_s *producernameout)
{
    Dwarf_Attribute producer_attr = 0;
    Dwarf_Error pnerr = 0;

    int ares = dwarf_attr(cu_die, DW_AT_producer,
        &producer_attr, &pnerr);
    if (ares == DW_DLV_ERROR) {
        print_error(dbg, "hassattr on DW_AT_producer", ares, pnerr);
    }
    if (ares == DW_DLV_NO_ENTRY) {
        /*  We add extra quotes so it looks more like
            the names for real producers that get_attr_value
            produces. */
        esb_append(producernameout,"\"<CU-missing-DW_AT_producer>\"");
    } else {
        /*  DW_DLV_OK */
        /*  The string return is valid until the next call to this
            function; so if the caller needs to keep the returned
            string, the string must be copied (makename()). */
        get_attr_value(dbg, DW_TAG_compile_unit,
            cu_die, dieprint_cu_offset,
            producer_attr, NULL, 0, producernameout,
            0 /*show_form_used*/,0 /* verbose */);
    }
    /*  If ares is error or missing case,
        producer_attr will be left
        NULL by the call,
        which is safe when calling dealloc(). */
    dwarf_dealloc(dbg, producer_attr, DW_DLA_ATTR);
    return ares;
}

/* GCC linkonce names */
char *lo_text           = ".text.";               /*".gnu.linkonce.t.";*/
char *lo_debug_abbr     = ".gnu.linkonce.wa.";
char *lo_debug_aranges  = ".gnu.linkonce.wr.";
char *lo_debug_frame_1  = ".gnu.linkonce.wf.";
char *lo_debug_frame_2  = ".gnu.linkonce.wF.";
char *lo_debug_info     = ".gnu.linkonce.wi.";
char *lo_debug_line     = ".gnu.linkonce.wl.";
char *lo_debug_macinfo  = ".gnu.linkonce.wm.";
char *lo_debug_loc      = ".gnu.linkonce.wo.";
char *lo_debug_pubnames = ".gnu.linkonce.wp.";
char *lo_debug_ranges   = ".gnu.linkonce.wR.";
char *lo_debug_str      = ".gnu.linkonce.ws.";

/* SNC compiler/linker linkonce names */
char *nlo_text           = ".text.";
char *nlo_debug_abbr     = ".debug.wa.";
char *nlo_debug_aranges  = ".debug.wr.";
char *nlo_debug_frame_1  = ".debug.wf.";
char *nlo_debug_frame_2  = ".debug.wF.";
char *nlo_debug_info     = ".debug.wi.";
char *nlo_debug_line     = ".debug.wl.";
char *nlo_debug_macinfo  = ".debug.wm.";
char *nlo_debug_loc      = ".debug.wo.";
char *nlo_debug_pubnames = ".debug.wp.";
char *nlo_debug_ranges   = ".debug.wR.";
char *nlo_debug_str      = ".debug.ws.";

/* Build linkonce section information */
void
build_linkonce_info(Dwarf_Debug dbg)
{
    int nCount = 0;
    int section_index = 0;
    int res = 0;

    static char **linkonce_names[] = {
        &lo_text,            /* .text */
        &nlo_text,           /* .text */
        &lo_debug_abbr,      /* .debug_abbr */
        &nlo_debug_abbr,     /* .debug_abbr */
        &lo_debug_aranges,   /* .debug_aranges */
        &nlo_debug_aranges,  /* .debug_aranges */
        &lo_debug_frame_1,   /* .debug_frame */
        &nlo_debug_frame_1,  /* .debug_frame */
        &lo_debug_frame_2,   /* .debug_frame */
        &nlo_debug_frame_2,  /* .debug_frame */
        &lo_debug_info,      /* .debug_info */
        &nlo_debug_info,     /* .debug_info */
        &lo_debug_line,      /* .debug_line */
        &nlo_debug_line,     /* .debug_line */
        &lo_debug_macinfo,   /* .debug_macinfo */
        &nlo_debug_macinfo,  /* .debug_macinfo */
        &lo_debug_loc,       /* .debug_loc */
        &nlo_debug_loc,      /* .debug_loc */
        &lo_debug_pubnames,  /* .debug_pubnames */
        &nlo_debug_pubnames, /* .debug_pubnames */
        &lo_debug_ranges,    /* .debug_ranges */
        &nlo_debug_ranges,   /* .debug_ranges */
        &lo_debug_str,       /* .debug_str */
        &nlo_debug_str,      /* .debug_str */
        NULL
    };

    const char *section_name = NULL;
    Dwarf_Addr section_addr = 0;
    Dwarf_Unsigned section_size = 0;
    Dwarf_Error error = 0;
    int nIndex = 0;

    nCount = dwarf_get_section_count(dbg);

    /* Ignore section with index=0 */
    for (section_index = 1; section_index < nCount; ++section_index) {
        res = dwarf_get_section_info_by_index(dbg,section_index,
            &section_name,
            &section_addr,
            &section_size,
            &error);

        if (res == DW_DLV_OK) {
            for (nIndex = 0; linkonce_names[nIndex]; ++nIndex) {
                if (section_name == strstr(section_name,
                    *linkonce_names[nIndex])) {

                    /* Insert only linkonce sections */
                    AddEntryIntoBucketGroup(glflags.pLinkonceInfo,
                        section_index,
                        section_addr,section_addr,
                        section_addr + section_size,
                        section_name,
                        TRUE);
                    break;
                }
            }
        }
    }

    if (dump_linkonce_info) {
        PrintBucketGroup(glflags.pLinkonceInfo,TRUE);
    }
}

/* Check for specific TAGs and initialize some
    information used by '-k' options */
void
tag_specific_checks_setup(Dwarf_Half val,int die_indent_level)
{
    switch (val) {
    case DW_TAG_compile_unit:
        /* To help getting the compile unit name */
        glflags.seen_CU = TRUE;
        /*  If we are checking line information, build
            the table containing the pairs LowPC and HighPC */
        if (glflags.gf_check_decl_file ||
            glflags.gf_check_ranges ||
            glflags.gf_check_locations) {
            ResetBucketGroup(glflags.pRangesInfo);
        }
        /*  The following flag indicate that only low_pc and high_pc
            values found in DW_TAG_subprograms are going to be considered when
            building the address table used to check ranges, lines, etc */
        glflags.need_PU_valid_code = TRUE;
        break;

    case DW_TAG_subprogram:
        /* Keep track of a PU */
        if (die_indent_level == 1) {
            /*  A DW_TAG_subprogram can be nested, when is used to
                declare a member function for a local class; process the DIE
                only if we are at level zero in the DIEs tree */
            glflags.seen_PU = TRUE;
            glflags.seen_PU_base_address = FALSE;
            glflags.seen_PU_high_address = FALSE;
            glflags.PU_name[0] = 0;
            glflags.need_PU_valid_code = TRUE;
        }
        break;
    }
}

/*  Print CU basic information but
    use the local DIE for the offsets. */
void PRINT_CU_INFO(void)
{
    Dwarf_Unsigned loff = glflags.DIE_offset;
    Dwarf_Unsigned goff = glflags.DIE_overall_offset;
    char lbuf[50];
    char hbuf[50];

    if (glflags.current_section_id == DEBUG_LINE ||
        glflags.current_section_id == DEBUG_FRAME ||
        glflags.current_section_id == DEBUG_FRAME_EH_GNU ||
        glflags.current_section_id == DEBUG_ARANGES ||
        glflags.current_section_id == DEBUG_MACRO ||
        glflags.current_section_id == DEBUG_MACINFO ) {
        /*  These sections involve the CU die, so
            use the CU offsets.
            The DEBUG_MAC* cases are logical but
            not yet useful (Dec 2015).
            In other cases the local DIE offset makes
            more sense. */
        loff = glflags.DIE_CU_offset;
        goff = glflags.DIE_CU_overall_offset;
    }
    if (!cu_data_is_set()) {
        return;
    }
    printf("\n");
    printf("CU Name = %s\n",sanitized(glflags.CU_name));
    printf("CU Producer = %s\n",sanitized(glflags.CU_producer));
    printf("DIE OFF = 0x%" DW_PR_XZEROS DW_PR_DUx
        " GOFF = 0x%" DW_PR_XZEROS DW_PR_DUx,
        loff,goff);
    /* We used to print leftover and incorrect values at times. */
    if (glflags.need_CU_high_address) {
        safe_strcpy(hbuf,sizeof(hbuf),"unknown   ",10);
    } else {
        /* safe, hbuf is large enough. */
        sprintf(hbuf,
            "0x%"  DW_PR_XZEROS DW_PR_DUx,glflags.CU_high_address);
    }
    if (glflags.need_CU_base_address) {
        safe_strcpy(lbuf,sizeof(lbuf),"unknown   ",10);
    } else {
        /* safe, lbuf is large enough. */
        sprintf(lbuf,
            "0x%"  DW_PR_XZEROS DW_PR_DUx,glflags.CU_low_address);
    }
#if 0 /* Old format print */
    printf(", Low PC = 0x%08" DW_PR_DUx ", High PC = 0x%08" DW_PR_DUx ,
        CU_low_address,CU_high_address);
#endif
    printf(", Low PC = %s, High PC = %s", lbuf,hbuf);
    printf("\n");
}

void DWARF_CHECK_ERROR_PRINT_CU()
{
    if (glflags.gf_check_verbose_mode) {
        if (glflags.gf_print_unique_errors) {
            if (!glflags.gf_found_error_message) {
                PRINT_CU_INFO();
            }
        } else {
            PRINT_CU_INFO();
        }
    }
    glflags.check_error++;
    glflags.gf_record_dwarf_error = TRUE;
}

/*  Sometimes is useful, just to know the kind of errors in an object file;
    not much interest in the number of errors; the specific case is just to
    have a general idea about the DWARF quality in the file */
char ** set_unique_errors = NULL;
unsigned int set_unique_errors_entries = 0;
unsigned int set_unique_errors_size = 0;
#define SET_UNIQUE_ERRORS_DELTA 64

/*  Create the space to store the unique error messages */
void allocate_unique_errors_table(void)
{
    if (!set_unique_errors) {
        set_unique_errors = (char **)
            malloc(SET_UNIQUE_ERRORS_DELTA * sizeof(char*));
        set_unique_errors_size = SET_UNIQUE_ERRORS_DELTA;
        set_unique_errors_entries = 0;
    }
}

#ifdef TESTING
/* Just for debugging purposes, dump the unique errors table */
void dump_unique_errors_table(void)
{
    unsigned int index;
    printf("*** Unique Errors Table ***\n");
    printf("Delta  : %d\n",SET_UNIQUE_ERRORS_DELTA);
    printf("Size   : %d\n",set_unique_errors_size);
    printf("Entries: %d\n",set_unique_errors_entries);
    for (index = 0; index < set_unique_errors_entries; ++index) {
        printf("%3d: '%s'\n",index,set_unique_errors[index]);
    }
}
#endif

/*  Release the space used to store the unique error messages */
void release_unique_errors_table(void)
{
    unsigned int index;
    for (index = 0; index < set_unique_errors_entries; ++index) {
        free(set_unique_errors[index]);
    }
    free(set_unique_errors);
    set_unique_errors = 0;
    set_unique_errors_entries = 0;
    set_unique_errors_size = 0;
}

/*  Returns TRUE if the text is already in the set; otherwise FALSE */
boolean add_to_unique_errors_table(char * error_text)
{
    unsigned int index;
    size_t len;
    char * stored_text;
    char * filtered_text;
    char * start = NULL;
    char * end = NULL;
    char * pattern = "0x";
    char * white = " ";
    char * question = "?";

    /* Create a copy of the incoming text */
    filtered_text = makename(error_text);
    len = strlen(filtered_text);

    /*  Remove from the error_text, any hexadecimal numbers (start with 0x),
        because for some errors, an additional information is given in the
        form of addresses; we are interested just in the general error. */
    start = strstr(filtered_text,pattern);
    while (start) {
        /* We have found the start of the pattern; look for a space */
        end = strstr(start,white);
        if (!end) {
            /* Preserve any line terminator */
            end = filtered_text + len -1;
        }
        memset(start,*question,end - start);
        start = strstr(filtered_text,pattern);
    }

    /* Check if the error text is already in the table */
    for (index = 0; index < set_unique_errors_entries; ++index) {
        stored_text = set_unique_errors[index];
        if (!strcmp(stored_text,filtered_text)) {
            return TRUE;
        }
    }

    /* Store the new text; check if we have space to store the error text */
    if (set_unique_errors_entries + 1 == set_unique_errors_size) {
        set_unique_errors_size += SET_UNIQUE_ERRORS_DELTA;
        set_unique_errors = (char **)realloc(set_unique_errors,
            set_unique_errors_size * sizeof(char*));
    }

    set_unique_errors[set_unique_errors_entries] = filtered_text;
    ++set_unique_errors_entries;

    return FALSE;
}

/*  Print a DWARF error message and if in "reduced" output only print one
    error of each kind; this feature is useful, when we are interested only
    in the kind of errors and not on the number of errors.
    PRECONDITION: if s3 non-null so are s1,s2.
        If  s2 is non-null so is s1.
        s1 is always non-null. */
static void
print_dwarf_check_error(const char *s1,const char *s2, const char *s3)
{
    static boolean do_init = TRUE;
    boolean found = FALSE;
    char * error_text = NULL;
    static char *leader =  "\n*** DWARF CHECK: ";
    static char *trailer = " ***\n";

    if (do_init) {
        esb_constructor(&dwarf_error_line);
        do_init = FALSE;
    }
    esb_empty_string(&dwarf_error_line);
    esb_append(&dwarf_error_line,leader);

    /*  print_dwarf_check_error("\n*** DWARF CHECK: %s ***\n", str);
        print_dwarf_check_error("\n*** DWARF CHECK: %s: %s ***\n",
        print_dwarf_check_error("\n*** DWARF CHECK: %s -> %s: %s ***\n", */
    if (s3) {
        esb_append(&dwarf_error_line,s1);
        esb_append(&dwarf_error_line," -> ");
        esb_append(&dwarf_error_line,s2);
        esb_append(&dwarf_error_line,": ");
        esb_append(&dwarf_error_line,s3);
    } else if (s2) {
        esb_append(&dwarf_error_line,s1);
        esb_append(&dwarf_error_line,": ");
        esb_append(&dwarf_error_line,s2);
    } else {
        esb_append(&dwarf_error_line,s1);
    }
    esb_append(&dwarf_error_line,trailer);

    error_text = esb_get_string(&dwarf_error_line);
    if (glflags.gf_print_unique_errors) {
        found = add_to_unique_errors_table(error_text);
        if (!found) {
            printf("%s",error_text);
        }
    } else {
        printf("%s",error_text);
    }

    /* To indicate if the current error message have been found or not */
    glflags.gf_found_error_message = found;
}

void DWARF_CHECK_ERROR3(Dwarf_Check_Categories category,
    const char *str1, const char *str2, const char *strexpl)
{
    if (checking_this_compiler()) {
        DWARF_ERROR_COUNT(category,1);
        if (glflags.gf_check_verbose_mode) {
            print_dwarf_check_error(str1, str2,strexpl);
        }
        DWARF_CHECK_ERROR_PRINT_CU();
    }
}