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Change minimal_symbol inheritance

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This changes struct minimal_symbol to inherit from general_symbol_info
and updates various macros to cope.

Because MSYMBOL_SET_LANGUAGE and MSYMBOL_SET_NAMES were only used from
a single spot, this patch removes them in favor of simply inlining
their definitions.  I consider this to be somewhat cleaner, not least
because the "phony polymorphism" provided by such macros is not useful
in practice.

gdb/ChangeLog
2019-03-15  Tom Tromey  <tom@tromey.com>

	* symtab.h (struct minimal_symbol): Derive from
	general_symbol_info.
	(MSYMBOL_VALUE, MSYMBOL_VALUE_RAW_ADDRESS)
	(MSYMBOL_VALUE_ADDRESS, MSYMBOL_VALUE_BYTES)
	(MSYMBOL_BLOCK_VALUE, MSYMBOL_VALUE_CHAIN, MSYMBOL_LANGUAGE)
	(MSYMBOL_SECTION, MSYMBOL_OBJ_SECTION, MSYMBOL_NATURAL_NAME)
	(MSYMBOL_LINKAGE_NAME, MSYMBOL_DEMANGLED_NAME)
	(MSYMBOL_SEARCH_NAME): Update.
	(MSYMBOL_SET_LANGUAGE, MSYMBOL_SET_NAMES): Remove.
	* solib.c (gdb_bfd_lookup_symbol_from_symtab): Don't use memset.
	* minsyms.c (minimal_symbol_reader::record_full): Update.
This commit is contained in:
Tom Tromey 2019-03-02 13:07:47 -07:00
parent 0de2420c4b
commit eefba3da27
4 changed files with 36 additions and 36 deletions
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14
gdb/ChangeLog
View File

@ -1,3 +1,17 @@
2019-03-15 Tom Tromey <tom@tromey.com>
* symtab.h (struct minimal_symbol): Derive from
general_symbol_info.
(MSYMBOL_VALUE, MSYMBOL_VALUE_RAW_ADDRESS)
(MSYMBOL_VALUE_ADDRESS, MSYMBOL_VALUE_BYTES)
(MSYMBOL_BLOCK_VALUE, MSYMBOL_VALUE_CHAIN, MSYMBOL_LANGUAGE)
(MSYMBOL_SECTION, MSYMBOL_OBJ_SECTION, MSYMBOL_NATURAL_NAME)
(MSYMBOL_LINKAGE_NAME, MSYMBOL_DEMANGLED_NAME)
(MSYMBOL_SEARCH_NAME): Update.
(MSYMBOL_SET_LANGUAGE, MSYMBOL_SET_NAMES): Remove.
* solib.c (gdb_bfd_lookup_symbol_from_symtab): Don't use memset.
* minsyms.c (minimal_symbol_reader::record_full): Update.
2019-03-15 Tom Tromey <tom@tromey.com>
* minsyms.c (minimal_symbol_reader::install): Use memcpy.

6
gdb/minsyms.c
View File

@ -1152,9 +1152,9 @@ minimal_symbol_reader::record_full (const char *name, int name_len,
m_msym_bunch = newobj;
}
msymbol = &m_msym_bunch->contents[m_msym_bunch_index];
MSYMBOL_SET_LANGUAGE (msymbol, language_auto,
&m_objfile->per_bfd->storage_obstack);
MSYMBOL_SET_NAMES (msymbol, name, name_len, copy_name, m_objfile);
symbol_set_language (msymbol, language_auto,
&m_objfile->per_bfd->storage_obstack);
symbol_set_names (msymbol, name, name_len, copy_name, m_objfile->per_bfd);
SET_MSYMBOL_VALUE_ADDRESS (msymbol, address);
MSYMBOL_SECTION (msymbol) = section;

3
gdb/solib.c
View File

@ -1501,9 +1501,8 @@ gdb_bfd_lookup_symbol_from_symtab (bfd *abfd,
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
&& gdbarch_elf_make_msymbol_special_p (gdbarch))
{
struct minimal_symbol msym;
struct minimal_symbol msym {};
memset (&msym, 0, sizeof (msym));
SET_MSYMBOL_VALUE_ADDRESS (&msym, symaddr);
gdbarch_elf_make_msymbol_special (gdbarch, sym, &msym);
symaddr = MSYMBOL_VALUE_RAW_ADDRESS (&msym);

49
gdb/symtab.h
View File

@ -641,16 +641,8 @@ gdb_static_assert (nr_minsym_types <= (1 << MINSYM_TYPE_BITS));
between names and addresses, and vice versa. They are also sometimes
used to figure out what full symbol table entries need to be read in. */
struct minimal_symbol
struct minimal_symbol : public general_symbol_info
{
/* The general symbol info required for all types of symbols.
The SYMBOL_VALUE_ADDRESS contains the address that this symbol
corresponds to. */
struct general_symbol_info mginfo;
/* Size of this symbol. dbx_end_psymtab in dbxread.c uses this
information to calculate the end of the partial symtab based on the
address of the last symbol plus the size of the last symbol. */
@ -687,7 +679,7 @@ struct minimal_symbol
struct minimal_symbol *demangled_hash_next;
/* True if this symbol is of some data type. */
/* True if this symbol is of some data type. */
bool data_p () const;
@ -708,43 +700,38 @@ struct minimal_symbol
#define MSYMBOL_HAS_SIZE(msymbol) ((msymbol)->has_size + 0)
#define MSYMBOL_TYPE(msymbol) (msymbol)->type
#define MSYMBOL_VALUE(symbol) (symbol)->mginfo.value.ivalue
#define MSYMBOL_VALUE(symbol) (symbol)->value.ivalue
/* The unrelocated address of the minimal symbol. */
#define MSYMBOL_VALUE_RAW_ADDRESS(symbol) ((symbol)->mginfo.value.address + 0)
#define MSYMBOL_VALUE_RAW_ADDRESS(symbol) ((symbol)->value.address + 0)
/* The relocated address of the minimal symbol, using the section
offsets from OBJFILE. */
#define MSYMBOL_VALUE_ADDRESS(objfile, symbol) \
((symbol)->mginfo.value.address \
+ ANOFFSET ((objfile)->section_offsets, ((symbol)->mginfo.section)))
((symbol)->value.address \
+ ANOFFSET ((objfile)->section_offsets, ((symbol)->section)))
/* For a bound minsym, we can easily compute the address directly. */
#define BMSYMBOL_VALUE_ADDRESS(symbol) \
MSYMBOL_VALUE_ADDRESS ((symbol).objfile, (symbol).minsym)
#define SET_MSYMBOL_VALUE_ADDRESS(symbol, new_value) \
((symbol)->mginfo.value.address = (new_value))
#define MSYMBOL_VALUE_BYTES(symbol) (symbol)->mginfo.value.bytes
#define MSYMBOL_BLOCK_VALUE(symbol) (symbol)->mginfo.value.block
#define MSYMBOL_VALUE_CHAIN(symbol) (symbol)->mginfo.value.chain
#define MSYMBOL_LANGUAGE(symbol) (symbol)->mginfo.language
#define MSYMBOL_SECTION(symbol) (symbol)->mginfo.section
((symbol)->value.address = (new_value))
#define MSYMBOL_VALUE_BYTES(symbol) (symbol)->value.bytes
#define MSYMBOL_BLOCK_VALUE(symbol) (symbol)->value.block
#define MSYMBOL_VALUE_CHAIN(symbol) (symbol)->value.chain
#define MSYMBOL_LANGUAGE(symbol) (symbol)->language
#define MSYMBOL_SECTION(symbol) (symbol)->section
#define MSYMBOL_OBJ_SECTION(objfile, symbol) \
(((symbol)->mginfo.section >= 0) \
? (&(((objfile)->sections)[(symbol)->mginfo.section])) \
(((symbol)->section >= 0) \
? (&(((objfile)->sections)[(symbol)->section])) \
: NULL)
#define MSYMBOL_NATURAL_NAME(symbol) \
(symbol_natural_name (&(symbol)->mginfo))
#define MSYMBOL_LINKAGE_NAME(symbol) (symbol)->mginfo.name
(symbol_natural_name (symbol))
#define MSYMBOL_LINKAGE_NAME(symbol) (symbol)->name
#define MSYMBOL_PRINT_NAME(symbol) \
(demangle ? MSYMBOL_NATURAL_NAME (symbol) : MSYMBOL_LINKAGE_NAME (symbol))
#define MSYMBOL_DEMANGLED_NAME(symbol) \
(symbol_demangled_name (&(symbol)->mginfo))
#define MSYMBOL_SET_LANGUAGE(symbol,language,obstack) \
(symbol_set_language (&(symbol)->mginfo, (language), (obstack)))
(symbol_demangled_name (symbol))
#define MSYMBOL_SEARCH_NAME(symbol) \
(symbol_search_name (&(symbol)->mginfo))
#define MSYMBOL_SET_NAMES(symbol,linkage_name,len,copy_name,objfile) \
symbol_set_names (&(symbol)->mginfo, linkage_name, len, copy_name, \
(objfile)->per_bfd)
(symbol_search_name (symbol))
#include "minsyms.h"