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2004-02-19 Joel Brobecker <brobecker@gnat.com>

Browse Source 
Committed by Elena Zannoni  <ezannoni@redhat.com>
	* symtab.c (find_pc_sect_psymtab): Return the psymtab that
	contains a symbol wich is the best, non-exact match for the given
	pc.  Update comments.
This commit is contained in:
Elena Zannoni 2004-02-19 19:01:26 +00:00
parent 2f01ffbf77
commit ccefbec374
2 changed files with 47 additions and 4 deletions
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10
gdb/ChangeLog
View File

@ -1,5 +1,13 @@
2004-02-19 Elena Zannoni <ezannoni@redhat.com>
2004-02-19 Joel Brobecker <brobecker@gnat.com>
Committed by Elena Zannoni <ezannoni@redhat.com>
* symtab.c (find_pc_sect_psymtab): Return the psymtab that
contains a symbol wich is the best, non-exact match for the given
pc. Update comments.
2004-02-19 Elena Zannoni <ezannoni@redhat.com>
* event-top.c (async_request_quit): Remove uses of REQUEST_QUIT
macro, which was part of the now removed Mach 3 port.
* utils.c (request_quit): Ditto.

41
gdb/symtab.c
View File

@ -672,8 +672,10 @@ init_sal (struct symtab_and_line *sal)
/* Find which partial symtab on contains PC and SECTION. Return 0 if none. */
/* Find which partial symtab contains PC and SECTION. Return 0 if
none. We return the psymtab that contains a symbol whose address
exactly matches PC, or, if we cannot find an exact match, the
psymtab that contains a symbol whose address is closest to PC. */
struct partial_symtab *
find_pc_sect_psymtab (CORE_ADDR pc, asection *section)
{
@ -698,6 +700,8 @@ find_pc_sect_psymtab (CORE_ADDR pc, asection *section)
if (pc >= pst->textlow && pc < pst->texthigh)
{
struct partial_symtab *tpst;
struct partial_symtab *best_pst = pst;
struct partial_symbol *best_psym = NULL;
/* An objfile that has its functions reordered might have
many partial symbol tables containing the PC, but
@ -710,6 +714,13 @@ find_pc_sect_psymtab (CORE_ADDR pc, asection *section)
if (msymbol == NULL)
return (pst);
/* The code range of partial symtabs sometimes overlap, so, in
the loop below, we need to check all partial symtabs and
find the one that fits better for the given PC address. We
select the partial symtab that contains a symbol whose
address is closest to the PC address. By closest we mean
that find_pc_sect_symbol returns the symbol with address
that is closest and still less than the given PC. */
for (tpst = pst; tpst != NULL; tpst = tpst->next)
{
if (pc >= tpst->textlow && pc < tpst->texthigh)
@ -721,9 +732,33 @@ find_pc_sect_psymtab (CORE_ADDR pc, asection *section)
&& SYMBOL_VALUE_ADDRESS (p)
== SYMBOL_VALUE_ADDRESS (msymbol))
return (tpst);
if (p != NULL)
{
/* We found a symbol in this partial symtab which
matches (or is closest to) PC, check whether it
is closer than our current BEST_PSYM. Since
this symbol address is necessarily lower or
equal to PC, the symbol closer to PC is the
symbol which address is the highest. */
/* This way we return the psymtab which contains
such best match symbol. This can help in cases
where the symbol information/debuginfo is not
complete, like for instance on IRIX6 with gcc,
where no debug info is emitted for
statics. (See also the nodebug.exp
testcase.) */
if (best_psym == NULL
|| SYMBOL_VALUE_ADDRESS (p)
> SYMBOL_VALUE_ADDRESS (best_psym))
{
best_psym = p;
best_pst = tpst;
}
}
}
}
return (pst);
return (best_pst);
}
}
return (NULL);