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Support lexical blocks and function bodies that occupy

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non-contiguous address ranges.
* addrmap.c, addrmap.h: New files.
* block.h (struct addrmap): New forward declaration.
(struct blockvector): New member, 'map'.
(BLOCKVECTOR_MAP): New accessor macro.
* block.c: #include "addrmap.h"
(blockvector_for_pc_sect): If the blockvector we've found has
an address map, use it instead of searching the blocks.
* buildsym.c: #include "addrmap.h"
(pending_addrmap_obstack, pending_addrmap_interesting): New static
variables.
(really_free_pendings): If we have a pending addrmap, free it too.
(record_block_range): New function.
(make_blockvector): If we have an interesting pending addrmap,
record it in the new blockvector.
(start_symtab, buildsym_init): Assert that there is no pending
addrmap now; we should have cleaned up any addrmaps we'd built
previously.
(end_symtab): If there is a pending addrmap left over that didn't
get included in the blockvector, free it.
* buildsym.h (struct addrmap): New forward declaration.
(record_block_range): New prototype.
* objfiles.c: #include "addrmap.h".
(objfile_relocate): Relocate the blockvector's address map, if
present.
* dwarf2read.c (dwarf2_record_block_ranges): New function.
(read_func_scope, read_lexical_block_scope): Call it.
* Makefile.in (SFILES): Add addrmap.c.
(addrmap_h): New header dependency variable.
(COMMON_OBS): Add addrmap.o.
(addrmap.o): New rule.l
(block.o, objfiles.o, buildsym.o): Depend on $(addrmap_h).

* block.c (blockvector_for_pc, blockvector_for_pc_sect): Return a
pointer to the block, not its index in the blockvector.
(block_for_pc_sect): Use the returned block, instead of looking it
up ourselves.
* block.h (blockvector_for_pc, blockvector_for_pc_sect): Update
declarations.
* breakpoint.c (resolve_sal_pc): Use returned block, instead of
looking it up ourselves.
* stack.c (print_frame_label_vars): Disable function, which
depends on the block's index.

* buildsym.c (finish_block): Return the block we've built.
* buildsym.h (finish_block): Update prototype.

* defs.h (CORE_ADDR_MAX): New constant.
This commit is contained in:
Jim Blandy 2007-12-04 23:43:57 +00:00
parent c420411fe8
commit 801e3a5b56
13 changed files with 947 additions and 32 deletions
Download patch file Download diff file Expand all files Collapse all files

45
gdb/block.c
View file

@ -23,6 +23,7 @@
#include "symfile.h"
#include "gdb_obstack.h"
#include "cp-support.h"
#include "addrmap.h"
/* This is used by struct block to store namespace-related info for
C++ files, namely using declarations and the current namespace in
@ -63,14 +64,14 @@ block_function (const struct block *bl)
return BLOCK_FUNCTION (bl);
}
/* Return the blockvector immediately containing the innermost lexical block
containing the specified pc value and section, or 0 if there is none.
PINDEX is a pointer to the index value of the block. If PINDEX
is NULL, we don't pass this information back to the caller. */
/* Return the blockvector immediately containing the innermost lexical
block containing the specified pc value and section, or 0 if there
is none. PBLOCK is a pointer to the block. If PBLOCK is NULL, we
don't pass this information back to the caller. */
struct blockvector *
blockvector_for_pc_sect (CORE_ADDR pc, struct bfd_section *section,
int *pindex, struct symtab *symtab)
struct block **pblock, struct symtab *symtab)
{
struct block *b;
int bot, top, half;
@ -85,11 +86,27 @@ blockvector_for_pc_sect (CORE_ADDR pc, struct bfd_section *section,
}
bl = BLOCKVECTOR (symtab);
b = BLOCKVECTOR_BLOCK (bl, 0);
/* Then search that symtab for the smallest block that wins. */
/* Use binary search to find the last block that starts before PC. */
/* If we have an addrmap mapping code addresses to blocks, then use
that. */
if (BLOCKVECTOR_MAP (bl))
{
b = addrmap_find (BLOCKVECTOR_MAP (bl), pc);
if (b)
{
if (pblock)
*pblock = b;
return bl;
}
else
return 0;
}
/* Otherwise, use binary search to find the last block that starts
before PC. */
bot = 0;
top = BLOCKVECTOR_NBLOCKS (bl);
@ -110,8 +127,8 @@ blockvector_for_pc_sect (CORE_ADDR pc, struct bfd_section *section,
b = BLOCKVECTOR_BLOCK (bl, bot);
if (BLOCK_END (b) > pc)
{
if (pindex)
*pindex = bot;
if (pblock)
*pblock = b;
return bl;
}
bot--;
@ -124,10 +141,10 @@ blockvector_for_pc_sect (CORE_ADDR pc, struct bfd_section *section,
Backward compatibility, no section. */
struct blockvector *
blockvector_for_pc (CORE_ADDR pc, int *pindex)
blockvector_for_pc (CORE_ADDR pc, struct block **pblock)
{
return blockvector_for_pc_sect (pc, find_pc_mapped_section (pc),
pindex, NULL);
pblock, NULL);
}
/* Return the innermost lexical block containing the specified pc value
@ -137,11 +154,11 @@ struct block *
block_for_pc_sect (CORE_ADDR pc, struct bfd_section *section)
{
struct blockvector *bl;
int index;
struct block *b;
bl = blockvector_for_pc_sect (pc, section, &index, NULL);
bl = blockvector_for_pc_sect (pc, section, &b, NULL);
if (bl)
return BLOCKVECTOR_BLOCK (bl, index);
return b;
return 0;
}