2002-10-08 Petr Sorfa <petrs@caldera.com>
Revised and re-submitted by John Wolfe <jlw@caldera.com> Move the Dwarf 2 abbrev table to a per-compilation-unit structure, so we can work on more than one compilation unit at a time. This helps prepare GDB to handle inter-CU die references. * dwarf2read.c (ABBREV_HASH_SIZE): moved definition forward in the code to be defined before struct comp_unit_head. (comp_unit_head): Added new members - offset, cu_head, begin_die, next and dwarf2_abbrevs. (dwarf2_abbrevs): Removed single static var; now member of struct comp_unit_head. dwarf2_build_psymtabs_hard): Complete new struct comp_unit_head members. (psymtab_to_symtab_1): Changed to work with the new struct comp_unit_head. (dwarf2_read_abbrevs): Now accepts a cu_header parameter and constructs the dwarf2_abbrevs[] inside the cu_header. (dwarf2_empty_abbrev_table): Now expects a ptr to a dwarf2_abbrev table to clean up. (dwarf2_lookup_abbrev): Now accepts a cu_header parameter and handling of dwarf2_abbrevs inside the cu_header. (read_partial_die): Now supports the call to the new dwarf2_lookup_abbrev. (read_full_die): Now supports the call to the new dwarf2_lookup_abbrev.
This commit is contained in:
Jim Blandy
parent
d14a0ab1e1
commit
57349743d5
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@ -1,3 +1,31 @@
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2002-10-08 Petr Sorfa <petrs@caldera.com>
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Revised and re-submitted by John Wolfe <jlw@caldera.com>
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Move the Dwarf 2 abbrev table to a per-compilation-unit structure,
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so we can work on more than one compilation unit at a time. This
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helps prepare GDB to handle inter-CU die references.
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* dwarf2read.c (ABBREV_HASH_SIZE): moved definition forward in
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the code to be defined before struct comp_unit_head.
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(comp_unit_head): Added new members - offset, cu_head,
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begin_die, next and dwarf2_abbrevs.
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(dwarf2_abbrevs): Removed single static var; now member of
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struct comp_unit_head.
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dwarf2_build_psymtabs_hard): Complete new struct comp_unit_head
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members.
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(psymtab_to_symtab_1): Changed to work with the new
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struct comp_unit_head.
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(dwarf2_read_abbrevs): Now accepts a cu_header parameter and
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constructs the dwarf2_abbrevs[] inside the cu_header.
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(dwarf2_empty_abbrev_table): Now expects a ptr to a
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dwarf2_abbrev table to clean up.
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(dwarf2_lookup_abbrev): Now accepts a cu_header parameter and
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handling of dwarf2_abbrevs inside the cu_header.
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(read_partial_die): Now supports the call to the new
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dwarf2_lookup_abbrev.
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(read_full_die): Now supports the call to the new
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dwarf2_lookup_abbrev.
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2002-10-06 Christopher Faylor <cgf@redhat.com>
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* Makefile.in (install-gdbtk): Add missing continuation backslash to
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@ -162,6 +162,11 @@ unsigned int dwarf_eh_frame_size;
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/* local data types */
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/* We hold several abbreviation tables in memory at the same time. */
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#ifndef ABBREV_HASH_SIZE
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#define ABBREV_HASH_SIZE 121
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#endif
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/* The data in a compilation unit header, after target2host
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translation, looks like this. */
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struct comp_unit_head
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@ -174,6 +179,29 @@ struct comp_unit_head
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unsigned int offset_size; /* size of file offsets; either 4 or 8 */
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unsigned int initial_length_size; /* size of the length field; either
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4 or 12 */
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/* Offset to the first byte of this compilation unit header in the
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* .debug_info section, for resolving relative reference dies. */
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unsigned int offset;
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/* Pointer to this compilation unit header in the .debug_info
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* section */
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char *cu_head_ptr;
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/* Pointer to the first die of this compilatio unit. This will
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* be the first byte following the compilation unit header. */
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char *first_die_ptr;
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/* Pointer to the next compilation unit header in the program. */
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struct comp_unit_head *next;
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/* DWARF abbreviation table associated with this compilation unit */
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struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE];
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};
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/* The line number information for a compilation unit (found in the
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@ -312,17 +340,10 @@ struct dwarf_block
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char *data;
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};
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/* We only hold one compilation unit's abbrevs in
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memory at any one time. */
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#ifndef ABBREV_HASH_SIZE
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#define ABBREV_HASH_SIZE 121
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#endif
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#ifndef ATTR_ALLOC_CHUNK
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#define ATTR_ALLOC_CHUNK 4
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#endif
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static struct abbrev_info *dwarf2_abbrevs[ABBREV_HASH_SIZE];
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/* A hash table of die offsets for following references. */
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#ifndef REF_HASH_SIZE
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#define REF_HASH_SIZE 1021
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@ -686,11 +707,12 @@ static void psymtab_to_symtab_1 (struct partial_symtab *);
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char *dwarf2_read_section (struct objfile *, file_ptr, unsigned int);
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static void dwarf2_read_abbrevs (bfd *, unsigned int);
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static void dwarf2_read_abbrevs (bfd *abfd, struct comp_unit_head *cu_header);
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static void dwarf2_empty_abbrev_table (PTR);
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static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int);
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static struct abbrev_info *dwarf2_lookup_abbrev (unsigned int,
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const struct comp_unit_head *cu_header);
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static char *read_partial_die (struct partial_die_info *,
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bfd *, char *,
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@ -1211,9 +1233,14 @@ dwarf2_build_psymtabs_hard (struct objfile *objfile, int mainline)
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(long) (beg_of_comp_unit - dwarf_info_buffer));
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return;
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}
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/* Complete the cu_header */
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cu_header.offset = beg_of_comp_unit - dwarf_info_buffer;
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cu_header.first_die_ptr = info_ptr;
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cu_header.cu_head_ptr = beg_of_comp_unit;
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/* Read the abbrevs for this compilation unit into a table */
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dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
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make_cleanup (dwarf2_empty_abbrev_table, NULL);
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dwarf2_read_abbrevs (abfd, &cu_header);
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make_cleanup (dwarf2_empty_abbrev_table, cu_header.dwarf2_abbrevs);
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/* Read the compilation unit die */
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info_ptr = read_partial_die (&comp_unit_die, abfd, info_ptr,
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@ -1560,8 +1587,8 @@ psymtab_to_symtab_1 (struct partial_symtab *pst)
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info_ptr = read_comp_unit_head (&cu_header, info_ptr, abfd);
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/* Read the abbrevs for this compilation unit */
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dwarf2_read_abbrevs (abfd, cu_header.abbrev_offset);
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make_cleanup (dwarf2_empty_abbrev_table, NULL);
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dwarf2_read_abbrevs (abfd, &cu_header);
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make_cleanup (dwarf2_empty_abbrev_table, cu_header.dwarf2_abbrevs);
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dies = read_comp_unit (info_ptr, abfd, &cu_header);
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@ -3345,17 +3372,18 @@ dwarf2_read_section (struct objfile *objfile, file_ptr offset,
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in a hash table. */
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static void
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dwarf2_read_abbrevs (bfd *abfd, unsigned int offset)
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dwarf2_read_abbrevs (bfd *abfd, struct comp_unit_head *cu_header)
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{
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char *abbrev_ptr;
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struct abbrev_info *cur_abbrev;
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unsigned int abbrev_number, bytes_read, abbrev_name;
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unsigned int abbrev_form, hash_number;
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/* empty the table */
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dwarf2_empty_abbrev_table (NULL);
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/* Initialize dwarf2 abbrevs */
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memset (cu_header->dwarf2_abbrevs, 0,
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ABBREV_HASH_SIZE*sizeof (struct abbrev_info *));
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abbrev_ptr = dwarf_abbrev_buffer + offset;
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abbrev_ptr = dwarf_abbrev_buffer + cu_header->abbrev_offset;
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abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
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abbrev_ptr += bytes_read;
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@ -3394,8 +3422,8 @@ dwarf2_read_abbrevs (bfd *abfd, unsigned int offset)
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}
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hash_number = abbrev_number % ABBREV_HASH_SIZE;
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cur_abbrev->next = dwarf2_abbrevs[hash_number];
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dwarf2_abbrevs[hash_number] = cur_abbrev;
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cur_abbrev->next = cu_header->dwarf2_abbrevs[hash_number];
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cu_header->dwarf2_abbrevs[hash_number] = cur_abbrev;
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/* Get next abbreviation.
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Under Irix6 the abbreviations for a compilation unit are not
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@ -3409,7 +3437,7 @@ dwarf2_read_abbrevs (bfd *abfd, unsigned int offset)
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break;
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abbrev_number = read_unsigned_leb128 (abfd, abbrev_ptr, &bytes_read);
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abbrev_ptr += bytes_read;
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if (dwarf2_lookup_abbrev (abbrev_number) != NULL)
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if (dwarf2_lookup_abbrev (abbrev_number, cu_header) != NULL)
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break;
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}
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}
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@ -3418,15 +3446,18 @@ dwarf2_read_abbrevs (bfd *abfd, unsigned int offset)
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/* ARGSUSED */
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static void
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dwarf2_empty_abbrev_table (PTR ignore)
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dwarf2_empty_abbrev_table (PTR ptr_to_abbrevs_table)
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{
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int i;
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struct abbrev_info *abbrev, *next;
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struct abbrev_info **abbrevs;
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abbrevs = (struct abbrev_info **)ptr_to_abbrevs_table;
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for (i = 0; i < ABBREV_HASH_SIZE; ++i)
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{
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next = NULL;
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abbrev = dwarf2_abbrevs[i];
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abbrev = abbrevs[i];
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while (abbrev)
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{
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next = abbrev->next;
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@ -3434,20 +3465,20 @@ dwarf2_empty_abbrev_table (PTR ignore)
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xfree (abbrev);
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abbrev = next;
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}
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dwarf2_abbrevs[i] = NULL;
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abbrevs[i] = NULL;
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}
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}
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/* Lookup an abbrev_info structure in the abbrev hash table. */
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static struct abbrev_info *
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dwarf2_lookup_abbrev (unsigned int number)
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dwarf2_lookup_abbrev (unsigned int number, const struct comp_unit_head *cu_header)
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{
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unsigned int hash_number;
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struct abbrev_info *abbrev;
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hash_number = number % ABBREV_HASH_SIZE;
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abbrev = dwarf2_abbrevs[hash_number];
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abbrev = cu_header->dwarf2_abbrevs[hash_number];
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while (abbrev)
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{
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@ -3479,7 +3510,7 @@ read_partial_die (struct partial_die_info *part_die, bfd *abfd,
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if (!abbrev_number)
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return info_ptr;
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abbrev = dwarf2_lookup_abbrev (abbrev_number);
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abbrev = dwarf2_lookup_abbrev (abbrev_number, cu_header);
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if (!abbrev)
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{
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error ("Dwarf Error: Could not find abbrev number %d.", abbrev_number);
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@ -3623,7 +3654,7 @@ read_full_die (struct die_info **diep, bfd *abfd, char *info_ptr,
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return info_ptr;
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}
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abbrev = dwarf2_lookup_abbrev (abbrev_number);
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abbrev = dwarf2_lookup_abbrev (abbrev_number, cu_header);
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if (!abbrev)
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{
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error ("Dwarf Error: could not find abbrev number %d.", abbrev_number);
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