/* Definitions for symbol file management in GDB.
- Copyright (C) 1992-2019 Free Software Foundation, Inc.
+ Copyright (C) 1992-2020 Free Software Foundation, Inc.
This file is part of GDB.
#include "registry.h"
#include "gdb_bfd.h"
#include "psymtab.h"
+#include <atomic>
+#include <bitset>
#include <vector>
-#include "common/next-iterator.h"
-#include "common/safe-iterator.h"
+#include "gdbsupport/next-iterator.h"
+#include "gdbsupport/safe-iterator.h"
+#include "bcache.h"
+#include "gdbarch.h"
+#include "gdbsupport/refcounted-object.h"
-struct bcache;
struct htab;
struct objfile_data;
struct partial_symbol;
testcase are broken for some targets. In this test the functions
are all implemented as part of one file and the testcase is not
necessarily linked with a start file (depending on the target).
- What happens is, that the first frame is printed normaly and
- following frames are treated as being inside the enttry file then.
+ What happens is, that the first frame is printed normally and
+ following frames are treated as being inside the entry file then.
This way, only the #0 frame is printed in the backtrace output.''
Ref "frame.c" "NOTE: vinschen/2003-04-01".
/* Relocation offset applied to S. */
#define obj_section_offset(s) \
- (((s)->objfile->section_offsets)->offsets[gdb_bfd_section_index ((s)->objfile->obfd, (s)->the_bfd_section)])
+ (((s)->objfile->section_offsets)[gdb_bfd_section_index ((s)->objfile->obfd, (s)->the_bfd_section)])
/* The memory address of section S (vma + offset). */
#define obj_section_addr(s) \
- (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section) \
+ (bfd_section_vma (s->the_bfd_section) \
+ obj_section_offset (s))
/* The one-passed-the-end memory address of section S
(vma + size + offset). */
#define obj_section_endaddr(s) \
- (bfd_get_section_vma ((s)->objfile->obfd, s->the_bfd_section) \
- + bfd_get_section_size ((s)->the_bfd_section) \
+ (bfd_section_vma (s->the_bfd_section) \
+ + bfd_section_size ((s)->the_bfd_section) \
+ obj_section_offset (s))
+#define ALL_OBJFILE_OSECTIONS(objfile, osect) \
+ for (osect = objfile->sections; osect < objfile->sections_end; osect++) \
+ if (osect->the_bfd_section == NULL) \
+ { \
+ /* Nothing. */ \
+ } \
+ else
+
+#define SECT_OFF_DATA(objfile) \
+ ((objfile->sect_index_data == -1) \
+ ? (internal_error (__FILE__, __LINE__, \
+ _("sect_index_data not initialized")), -1) \
+ : objfile->sect_index_data)
+
+#define SECT_OFF_RODATA(objfile) \
+ ((objfile->sect_index_rodata == -1) \
+ ? (internal_error (__FILE__, __LINE__, \
+ _("sect_index_rodata not initialized")), -1) \
+ : objfile->sect_index_rodata)
+
+#define SECT_OFF_TEXT(objfile) \
+ ((objfile->sect_index_text == -1) \
+ ? (internal_error (__FILE__, __LINE__, \
+ _("sect_index_text not initialized")), -1) \
+ : objfile->sect_index_text)
+
+/* Sometimes the .bss section is missing from the objfile, so we don't
+ want to die here. Let the users of SECT_OFF_BSS deal with an
+ uninitialized section index. */
+#define SECT_OFF_BSS(objfile) (objfile)->sect_index_bss
+
/* The "objstats" structure provides a place for gdb to record some
interesting information about its internal state at runtime, on a
per objfile basis, such as information about the number of symbols
/* Number of entries in the minimal symbol hash table. */
#define MINIMAL_SYMBOL_HASH_SIZE 2039
+/* An iterator for minimal symbols. */
+
+struct minimal_symbol_iterator
+{
+ typedef minimal_symbol_iterator self_type;
+ typedef struct minimal_symbol *value_type;
+ typedef struct minimal_symbol *&reference;
+ typedef struct minimal_symbol **pointer;
+ typedef std::forward_iterator_tag iterator_category;
+ typedef int difference_type;
+
+ explicit minimal_symbol_iterator (struct minimal_symbol *msym)
+ : m_msym (msym)
+ {
+ }
+
+ value_type operator* () const
+ {
+ return m_msym;
+ }
+
+ bool operator== (const self_type &other) const
+ {
+ return m_msym == other.m_msym;
+ }
+
+ bool operator!= (const self_type &other) const
+ {
+ return m_msym != other.m_msym;
+ }
+
+ self_type &operator++ ()
+ {
+ ++m_msym;
+ return *this;
+ }
+
+private:
+ struct minimal_symbol *m_msym;
+};
+
/* Some objfile data is hung off the BFD. This enables sharing of the
data across all objfiles using the BFD. The data is stored in an
instance of this structure, and associated with the BFD using the
: minsyms_read (false)
{}
+ ~objfile_per_bfd_storage ();
+
/* The storage has an obstack of its own. */
auto_obstack storage_obstack;
- /* Byte cache for file names. */
+ /* String cache. */
- bcache *filename_cache = NULL;
-
- /* Byte cache for macros. */
-
- bcache *macro_cache = NULL;
+ gdb::bcache string_cache;
/* The gdbarch associated with the BFD. Note that this gdbarch is
determined solely from BFD information, without looking at target
struct gdbarch *gdbarch = NULL;
/* Hash table for mapping symbol names to demangled names. Each
- entry in the hash table is actually two consecutive strings,
- both null-terminated; the first one is a mangled or linkage
- name, and the second is the demangled name or just a zero byte
- if the name doesn't demangle. */
+ entry in the hash table is a demangled_name_entry struct, storing the
+ language and two consecutive strings, both null-terminated; the first one
+ is a mangled or linkage name, and the second is the demangled name or just
+ a zero byte if the name doesn't demangle. */
- htab *demangled_names_hash = NULL;
+ htab_up demangled_names_hash;
/* The per-objfile information about the entry point, the scope (file/func)
containing the entry point, and the scope of the user's main() func. */
name and a zero value for the address. This makes it easy to walk
through the array when passed a pointer to somewhere in the middle
of it. There is also a count of the number of symbols, which does
- not include the terminating null symbol. The array itself, as well
- as all the data that it points to, should be allocated on the
- objfile_obstack for this file. */
+ not include the terminating null symbol. */
- minimal_symbol *msymbols = NULL;
+ gdb::unique_xmalloc_ptr<minimal_symbol> msymbols;
int minimal_symbol_count = 0;
/* The number of minimal symbols read, before any minimal symbol
bool minsyms_read : 1;
- /* This is a hash table used to index the minimal symbols by name. */
+ /* This is a hash table used to index the minimal symbols by (mangled)
+ name. */
minimal_symbol *msymbol_hash[MINIMAL_SYMBOL_HASH_SIZE] {};
/* This hash table is used to index the minimal symbols by their
- demangled names. */
+ demangled names. Uses a language-specific hash function via
+ search_name_hash. */
minimal_symbol *msymbol_demangled_hash[MINIMAL_SYMBOL_HASH_SIZE] {};
/* All the different languages of symbols found in the demangled
- hash table. A flat/vector-based map is more efficient than a map
- or hash table here, since this will only usually contain zero or
- one entries. */
- std::vector<enum language> demangled_hash_languages;
+ hash table. */
+ std::bitset<nr_languages> demangled_hash_languages;
+};
+
+/* An iterator that first returns a parent objfile, and then each
+ separate debug objfile. */
+
+class separate_debug_iterator
+{
+public:
+
+ explicit separate_debug_iterator (struct objfile *objfile)
+ : m_objfile (objfile),
+ m_parent (objfile)
+ {
+ }
+
+ bool operator!= (const separate_debug_iterator &other)
+ {
+ return m_objfile != other.m_objfile;
+ }
+
+ separate_debug_iterator &operator++ ();
+
+ struct objfile *operator* ()
+ {
+ return m_objfile;
+ }
+
+private:
+
+ struct objfile *m_objfile;
+ struct objfile *m_parent;
+};
+
+/* A range adapter wrapping separate_debug_iterator. */
+
+class separate_debug_range
+{
+public:
+
+ explicit separate_debug_range (struct objfile *objfile)
+ : m_objfile (objfile)
+ {
+ }
+
+ separate_debug_iterator begin ()
+ {
+ return separate_debug_iterator (m_objfile);
+ }
+
+ separate_debug_iterator end ()
+ {
+ return separate_debug_iterator (nullptr);
+ }
+
+private:
+
+ struct objfile *m_objfile;
};
/* Master structure for keeping track of each file from which
2. Additional symbol files added by the add-symbol-file command,
3. Shared library objfiles, added by ADD_SOLIB, 4. symbol files
for modules that were loaded when GDB attached to a remote system
- (see remote-vx.c). */
+ (see remote-vx.c).
+
+ GDB typically reads symbols twice -- first an initial scan which just
+ reads "partial symbols"; these are partial information for the
+ static/global symbols in a symbol file. When later looking up symbols,
+ objfile->sf->qf->lookup_symbol is used to check if we only have a partial
+ symbol and if so, read and expand the full compunit. */
struct objfile
{
+private:
+
+ /* The only way to create an objfile is to call objfile::make. */
objfile (bfd *, const char *, objfile_flags);
+
+public:
+
+ /* Normally you should not call delete. Instead, call 'unlink' to
+ remove it from the program space's list. In some cases, you may
+ need to hold a reference to an objfile that is independent of its
+ existence on the program space's list; for this case, the
+ destructor must be public so that shared_ptr can reference
+ it. */
~objfile ();
+ /* Create an objfile. */
+ static objfile *make (bfd *bfd_, const char *name_, objfile_flags flags_,
+ objfile *parent = nullptr);
+
+ /* Remove an objfile from the current program space, and free
+ it. */
+ void unlink ();
+
DISABLE_COPY_AND_ASSIGN (objfile);
+ /* A range adapter that makes it possible to iterate over all
+ psymtabs in one objfile. */
+
+ psymtab_storage::partial_symtab_range psymtabs ()
+ {
+ return partial_symtabs->range ();
+ }
+
/* Reset the storage for the partial symbol tables. */
void reset_psymtabs ()
partial_symtabs.reset (new psymtab_storage ());
}
+ typedef next_adapter<struct compunit_symtab> compunits_range;
+
+ /* A range adapter that makes it possible to iterate over all
+ compunits in one objfile. */
+
+ compunits_range compunits ()
+ {
+ return compunits_range (compunit_symtabs);
+ }
+
+ /* A range adapter that makes it possible to iterate over all
+ minimal symbols of an objfile. */
+
+ class msymbols_range
+ {
+ public:
+
+ explicit msymbols_range (struct objfile *objfile)
+ : m_objfile (objfile)
+ {
+ }
+
+ minimal_symbol_iterator begin () const
+ {
+ return minimal_symbol_iterator (m_objfile->per_bfd->msymbols.get ());
+ }
+
+ minimal_symbol_iterator end () const
+ {
+ return minimal_symbol_iterator
+ (m_objfile->per_bfd->msymbols.get ()
+ + m_objfile->per_bfd->minimal_symbol_count);
+ }
+
+ private:
+
+ struct objfile *m_objfile;
+ };
+
+ /* Return a range adapter for iterating over all minimal
+ symbols. */
+
+ msymbols_range msymbols ()
+ {
+ return msymbols_range (this);
+ }
+
+ /* Return a range adapter for iterating over all the separate debug
+ objfiles of this objfile. */
+
+ separate_debug_range separate_debug_objfiles ()
+ {
+ return separate_debug_range (this);
+ }
+
+ CORE_ADDR text_section_offset () const
+ {
+ return section_offsets[SECT_OFF_TEXT (this)];
+ }
+
+ CORE_ADDR data_section_offset () const
+ {
+ return section_offsets[SECT_OFF_DATA (this)];
+ }
+
+ /* Intern STRING and return the unique copy. The copy has the same
+ lifetime as the per-BFD object. */
+ const char *intern (const char *str)
+ {
+ return (const char *) per_bfd->string_cache.insert (str, strlen (str) + 1);
+ }
+
+ /* Intern STRING and return the unique copy. The copy has the same
+ lifetime as the per-BFD object. */
+ const char *intern (const std::string &str)
+ {
+ return (const char *) per_bfd->string_cache.insert (str.c_str (),
+ str.size () + 1);
+ }
- /* All struct objfile's are chained together by their next pointers.
- The program space field "objfiles" (frequently referenced via
- the macro "object_files") points to the first link in this chain. */
+ /* Retrieve the gdbarch associated with this objfile. */
+ struct gdbarch *arch () const
+ {
+ return per_bfd->gdbarch;
+ }
- struct objfile *next = nullptr;
/* The object file's original name as specified by the user,
made absolute, and tilde-expanded. However, it is not canonicalized
This pointer is never NULL. This does not have to be freed; it is
guaranteed to have a lifetime at least as long as the objfile. */
- char *original_name = nullptr;
+ const char *original_name = nullptr;
CORE_ADDR addr_low = 0;
/* Set of relocation offsets to apply to each section.
The table is indexed by the_bfd_section->index, thus it is generally
as large as the number of sections in the binary.
- The table is stored on the objfile_obstack.
These offsets indicate that all symbols (including partial and
minimal symbols) which have been read have been relocated by this
much. Symbols which are yet to be read need to be relocated by it. */
- struct section_offsets *section_offsets = nullptr;
- int num_sections = 0;
+ ::section_offsets section_offsets;
/* Indexes in the section_offsets array. These are initialized by the
*_symfile_offsets() family of functions (som_symfile_offsets,
Very few blocks have a static link, so it's more memory efficient to
store these here rather than in struct block. Static links must be
allocated on the objfile's obstack. */
- htab_t static_links {};
+ htab_up static_links;
};
-/* Declarations for functions defined in objfiles.c */
-
-extern struct gdbarch *get_objfile_arch (const struct objfile *);
+/* A deleter for objfile. */
-extern int entry_point_address_query (CORE_ADDR *entry_p);
+struct objfile_deleter
+{
+ void operator() (objfile *ptr) const
+ {
+ ptr->unlink ();
+ }
+};
-extern CORE_ADDR entry_point_address (void);
+/* A unique pointer that holds an objfile. */
-extern void build_objfile_section_table (struct objfile *);
+typedef std::unique_ptr<objfile, objfile_deleter> objfile_up;
-extern struct objfile *objfile_separate_debug_iterate (const struct objfile *,
- const struct objfile *);
+/* Declarations for functions defined in objfiles.c */
-extern void put_objfile_before (struct objfile *, struct objfile *);
+extern int entry_point_address_query (CORE_ADDR *entry_p);
-extern void add_separate_debug_objfile (struct objfile *, struct objfile *);
+extern CORE_ADDR entry_point_address (void);
-extern void unlink_objfile (struct objfile *);
+extern void build_objfile_section_table (struct objfile *);
extern void free_objfile_separate_debug (struct objfile *);
-extern void free_all_objfiles (void);
-
-extern void objfile_relocate (struct objfile *, const struct section_offsets *);
+extern void objfile_relocate (struct objfile *, const section_offsets &);
extern void objfile_rebase (struct objfile *, CORE_ADDR);
extern int objfile_has_partial_symbols (struct objfile *objfile);
extern void objfiles_changed (void);
-extern int is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile);
+/* Return true if ADDR maps into one of the sections of OBJFILE and false
+ otherwise. */
+
+extern bool is_addr_in_objfile (CORE_ADDR addr, const struct objfile *objfile);
/* Return true if ADDRESS maps into one of the sections of a
OBJF_SHARED objfile of PSPACE and false otherwise. */
-extern int shared_objfile_contains_address_p (struct program_space *pspace,
- CORE_ADDR address);
+extern bool shared_objfile_contains_address_p (struct program_space *pspace,
+ CORE_ADDR address);
/* This operation deletes all objfile entries that represent solibs that
weren't explicitly loaded by the user, via e.g., the add-symbol-file
(struct gdbarch *gdbarch,
iterate_over_objfiles_in_search_order_cb_ftype *cb,
void *cb_data, struct objfile *current_objfile);
-\f
-
-/* A range adapter that makes it possible to iterate over all
- compunits in one objfile. */
-
-class objfile_compunits : public next_adapter<struct compunit_symtab>
-{
-public:
-
- explicit objfile_compunits (struct objfile *objfile)
- : next_adapter<struct compunit_symtab> (objfile->compunit_symtabs)
- {
- }
-};
-
-/* A range adapter that makes it possible to iterate over all
- minimal symbols of an objfile. */
-
-class objfile_msymbols
-{
-public:
-
- explicit objfile_msymbols (struct objfile *objfile)
- : m_objfile (objfile)
- {
- }
-
- struct iterator
- {
- typedef iterator self_type;
- typedef struct minimal_symbol *value_type;
- typedef struct minimal_symbol *&reference;
- typedef struct minimal_symbol **pointer;
- typedef std::forward_iterator_tag iterator_category;
- typedef int difference_type;
-
- explicit iterator (struct objfile *objfile)
- : m_msym (objfile->per_bfd->msymbols)
- {
- /* Make sure to properly handle the case where there are no
- minsyms. */
- if (MSYMBOL_LINKAGE_NAME (m_msym) == nullptr)
- m_msym = nullptr;
- }
-
- iterator ()
- : m_msym (nullptr)
- {
- }
-
- value_type operator* () const
- {
- return m_msym;
- }
-
- bool operator== (const self_type &other) const
- {
- return m_msym == other.m_msym;
- }
-
- bool operator!= (const self_type &other) const
- {
- return m_msym != other.m_msym;
- }
-
- self_type &operator++ ()
- {
- if (m_msym != nullptr)
- {
- ++m_msym;
- if (MSYMBOL_LINKAGE_NAME (m_msym) == nullptr)
- m_msym = nullptr;
- }
- return *this;
- }
-
- private:
- struct minimal_symbol *m_msym;
- };
-
- iterator begin () const
- {
- return iterator (m_objfile);
- }
-
- iterator end () const
- {
- return iterator ();
- }
-
-private:
-
- struct objfile *m_objfile;
-};
-
-/* A range adapter that makes it possible to iterate over all
- psymtabs in one objfile. */
-
-class objfile_psymtabs : public next_adapter<struct partial_symtab>
-{
-public:
-
- explicit objfile_psymtabs (struct objfile *objfile)
- : next_adapter<struct partial_symtab> (objfile->partial_symtabs->psymtabs)
- {
- }
-};
-
-#define ALL_OBJFILE_OSECTIONS(objfile, osect) \
- for (osect = objfile->sections; osect < objfile->sections_end; osect++) \
- if (osect->the_bfd_section == NULL) \
- { \
- /* Nothing. */ \
- } \
- else
-
-#define SECT_OFF_DATA(objfile) \
- ((objfile->sect_index_data == -1) \
- ? (internal_error (__FILE__, __LINE__, \
- _("sect_index_data not initialized")), -1) \
- : objfile->sect_index_data)
-
-#define SECT_OFF_RODATA(objfile) \
- ((objfile->sect_index_rodata == -1) \
- ? (internal_error (__FILE__, __LINE__, \
- _("sect_index_rodata not initialized")), -1) \
- : objfile->sect_index_rodata)
-
-#define SECT_OFF_TEXT(objfile) \
- ((objfile->sect_index_text == -1) \
- ? (internal_error (__FILE__, __LINE__, \
- _("sect_index_text not initialized")), -1) \
- : objfile->sect_index_text)
-
-/* Sometimes the .bss section is missing from the objfile, so we don't
- want to die here. Let the users of SECT_OFF_BSS deal with an
- uninitialized section index. */
-#define SECT_OFF_BSS(objfile) (objfile)->sect_index_bss
-
-/* Answer whether there is more than one object file loaded. */
-
-#define MULTI_OBJFILE_P() (object_files && object_files->next)
/* Reset the per-BFD storage area on OBJ. */
projects / thirdparty / binutils-gdb.git / blobdiff