diff options
author | Jim Blandy <jimb@codesourcery.com> | 2007-12-04 23:43:57 +0000 |
---|---|---|
committer | Jim Blandy <jimb@codesourcery.com> | 2007-12-04 23:43:57 +0000 |
commit | 801e3a5b5681c44b2fec1b392dddec386870647c (patch) | |
tree | fc5540169fef73f5721542765234f47023c7763d /gdb/block.c | |
parent | c420411fe81ad583b2154fd9338fd0076761d99d (diff) | |
download | fsf-binutils-gdb-801e3a5b5681c44b2fec1b392dddec386870647c.zip fsf-binutils-gdb-801e3a5b5681c44b2fec1b392dddec386870647c.tar.gz fsf-binutils-gdb-801e3a5b5681c44b2fec1b392dddec386870647c.tar.bz2 |
Support lexical blocks and function bodies that occupy
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.
Diffstat (limited to 'gdb/block.c')
-rw-r--r-- | gdb/block.c | 45 |
1 files changed, 31 insertions, 14 deletions
diff --git a/gdb/block.c b/gdb/block.c index 858d42d..d5c458e 100644 --- a/gdb/block.c +++ b/gdb/block.c @@ -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; } |