/* Private partial symbol table definitions.
- Copyright (C) 2009-2013 Free Software Foundation, Inc.
+ Copyright (C) 2009-2020 Free Software Foundation, Inc.
This file is part of GDB.
#define PSYMPRIV_H
#include "psymtab.h"
-
-struct psymbol_allocation_list;
+#include "objfiles.h"
+#include "gdbsupport/gdb_string_view.h"
/* A partial_symbol records the name, domain, and address class of
symbols whose types we have not parsed yet. For functions, it also
contains their memory address, so we can find them from a PC value.
Each partial_symbol sits in a partial_symtab, all of which are chained
- on a partial symtab list and which points to the corresponding
+ on a partial symtab list and which points to the corresponding
normal symtab once the partial_symtab has been referenced. */
/* This structure is space critical. See space comments at the top of
struct partial_symbol
{
+ /* Return the section for this partial symbol, or nullptr if no
+ section has been set. */
+ struct obj_section *obj_section (struct objfile *objfile) const
+ {
+ if (ginfo.section >= 0)
+ return &objfile->sections[ginfo.section];
+ return nullptr;
+ }
+
+ /* Return the unrelocated address of this partial symbol. */
+ CORE_ADDR unrelocated_address () const
+ {
+ return ginfo.value.address;
+ }
- /* The general symbol info required for all types of symbols. */
+ /* Return the address of this partial symbol, relocated according to
+ the offsets provided in OBJFILE. */
+ CORE_ADDR address (const struct objfile *objfile) const
+ {
+ return ginfo.value.address + objfile->section_offsets[ginfo.section];
+ }
+
+ /* Set the address of this partial symbol. The address must be
+ unrelocated. */
+ void set_unrelocated_address (CORE_ADDR addr)
+ {
+ ginfo.value.address = addr;
+ }
+
+ /* Note that partial_symbol does not derive from general_symbol_info
+ due to the bcache. See add_psymbol_to_bcache. */
struct general_symbol_info ginfo;
/* Name space code. */
- ENUM_BITFIELD(domain_enum_tag) domain : 6;
+ ENUM_BITFIELD(domain_enum_tag) domain : SYMBOL_DOMAIN_BITS;
/* Address class (for info_symbols). Note that we don't allow
synthetic "aclass" values here at present, simply because there's
no need. */
- ENUM_BITFIELD(address_class) aclass : 6;
-
+ ENUM_BITFIELD(address_class) aclass : SYMBOL_ACLASS_BITS;
};
-#define PSYMBOL_DOMAIN(psymbol) (psymbol)->domain
-#define PSYMBOL_CLASS(psymbol) (psymbol)->aclass
-
/* A convenience enum to give names to some constants used when
searching psymtabs. This is internal to psymtab and should not be
used elsewhere. */
They are all chained on partial symtab lists.
Even after the source file has been read into a symtab, the
- partial_symtab remains around. They are allocated on an obstack,
- objfile_obstack. */
+ partial_symtab remains around. */
struct partial_symtab
{
+ /* Allocate a new partial symbol table associated with OBJFILE.
+ FILENAME (which must be non-NULL) is the filename of this partial
+ symbol table; it is copied into the appropriate storage. The
+ partial symtab will also be installed using
+ psymtab_storage::install. */
+
+ partial_symtab (const char *filename, struct objfile *objfile)
+ ATTRIBUTE_NONNULL (2) ATTRIBUTE_NONNULL (3);
+
+ /* Like the above, but also sets the initial text low and text high
+ from the ADDR argument, and sets the global- and
+ static-offsets. */
+
+ partial_symtab (const char *filename, struct objfile *objfile,
+ CORE_ADDR addr)
+ ATTRIBUTE_NONNULL (2) ATTRIBUTE_NONNULL (3);
+
+ virtual ~partial_symtab ()
+ {
+ }
+
+ /* Read the full symbol table corresponding to this partial symbol
+ table. */
+ virtual void read_symtab (struct objfile *) = 0;
+
+ /* Psymtab expansion is done in two steps. The first step is a call
+ to read_symtab; but while that is in progress, calls to
+ expand_psymtab can be made. */
+ virtual void expand_psymtab (struct objfile *) = 0;
+
+ /* Ensure that all the dependencies are read in. */
+ void expand_dependencies (struct objfile *);
+
+ /* Return true if the symtab corresponding to this psymtab has been
+ readin. */
+ virtual bool readin_p () const = 0;
+
+ /* Return a pointer to the compunit allocated for this source file.
+ Return nullptr if !readin or if there was no symtab. */
+ virtual struct compunit_symtab *get_compunit_symtab () const = 0;
+
+
+ /* Return the raw low text address of this partial_symtab. */
+ CORE_ADDR raw_text_low () const
+ {
+ return m_text_low;
+ }
+
+ /* Return the raw high text address of this partial_symtab. */
+ CORE_ADDR raw_text_high () const
+ {
+ return m_text_high;
+ }
+
+ /* Return the relocated low text address of this partial_symtab. */
+ CORE_ADDR text_low (struct objfile *objfile) const
+ {
+ return m_text_low + objfile->text_section_offset ();
+ }
+
+ /* Return the relocated high text address of this partial_symtab. */
+ CORE_ADDR text_high (struct objfile *objfile) const
+ {
+ return m_text_high + objfile->text_section_offset ();
+ }
+
+ /* Set the low text address of this partial_symtab. */
+ void set_text_low (CORE_ADDR addr)
+ {
+ m_text_low = addr;
+ text_low_valid = 1;
+ }
+
+ /* Set the hight text address of this partial_symtab. */
+ void set_text_high (CORE_ADDR addr)
+ {
+ m_text_high = addr;
+ text_high_valid = 1;
+ }
+
/* Chain of all existing partial symtabs. */
- struct partial_symtab *next;
+ struct partial_symtab *next = nullptr;
/* Name of the source file which this partial_symtab defines,
or if the psymtab is anonymous then a descriptive name for
debugging purposes, or "". It must not be NULL. */
- const char *filename;
+ const char *filename = nullptr;
/* Full path of the source file. NULL if not known. */
- char *fullname;
+ char *fullname = nullptr;
/* Directory in which it was compiled, or NULL if we don't know. */
- const char *dirname;
-
- /* Set of relocation offsets to apply to each section. */
-
- struct section_offsets *section_offsets;
+ const char *dirname = nullptr;
/* Range of text addresses covered by this file; texthigh is the
beginning of the next section. Do not use if PSYMTABS_ADDRMAP_SUPPORTED
- is set. */
-
- CORE_ADDR textlow;
- CORE_ADDR texthigh;
-
- /* Array of pointers to all of the partial_symtab's which this one
- depends on. Since this array can only be set to previous or
- the current (?) psymtab, this dependency tree is guaranteed not
- to have any loops. "depends on" means that symbols must be read
- for the dependencies before being read for this psymtab; this is
- for type references in stabs, where if foo.c includes foo.h, declarations
- in foo.h may use type numbers defined in foo.c. For other debugging
- formats there may be no need to use dependencies. */
+ is set. Do not refer directly to these fields. Instead, use the
+ accessors. The validity of these fields is determined by the
+ text_low_valid and text_high_valid fields; these are located later
+ in this structure for better packing. */
- struct partial_symtab **dependencies;
-
- int number_of_dependencies;
+ CORE_ADDR m_text_low = 0;
+ CORE_ADDR m_text_high = 0;
/* If NULL, this is an ordinary partial symbol table.
In DWARF terms, a shared psymtab is a DW_TAG_partial_unit; but
of course using a name based on that would be too confusing, so
"shared" was chosen instead.
-
+
Only a single user is needed because, when expanding a shared
psymtab, we only need to expand its "canonical" non-shared user.
The choice of which one should be canonical is left to the
debuginfo reader; it can be arbitrary. */
- struct partial_symtab *user;
+ struct partial_symtab *user = nullptr;
+
+ /* Array of pointers to all of the partial_symtab's which this one
+ depends on. Since this array can only be set to previous or
+ the current (?) psymtab, this dependency tree is guaranteed not
+ to have any loops. "depends on" means that symbols must be read
+ for the dependencies before being read for this psymtab; this is
+ for type references in stabs, where if foo.c includes foo.h, declarations
+ in foo.h may use type numbers defined in foo.c. For other debugging
+ formats there may be no need to use dependencies. */
+
+ struct partial_symtab **dependencies = nullptr;
+
+ int number_of_dependencies = 0;
/* Global symbol list. This list will be sorted after readin to
improve access. Binary search will be the usual method of
finding a symbol within it. globals_offset is an integer offset
within global_psymbols[]. */
- int globals_offset;
- int n_global_syms;
+ int globals_offset = 0;
+ int n_global_syms = 0;
/* Static symbol list. This list will *not* be sorted after readin;
to find a symbol in it, exhaustive search must be used. This is
how long errors take). This is an offset and size within
static_psymbols[]. */
- int statics_offset;
- int n_static_syms;
-
- /* Non-zero if the symtab corresponding to this psymtab has been
- readin. This is located here so that this structure packs better
- on 64-bit systems. */
-
- unsigned char readin;
+ int statics_offset = 0;
+ int n_static_syms = 0;
/* True iff objfile->psymtabs_addrmap is properly populated for this
partial_symtab. For discontiguous overlapping psymtabs is the only usable
info in PSYMTABS_ADDRMAP. */
- unsigned char psymtabs_addrmap_supported;
+ bool psymtabs_addrmap_supported = false;
/* True if the name of this partial symtab is not a source file name. */
- unsigned char anonymous;
+ bool anonymous = false;
/* A flag that is temporarily used when searching psymtabs. */
ENUM_BITFIELD (psymtab_search_status) searched_flag : 2;
- /* Pointer to symtab eventually allocated for this source file, 0 if
+ /* Validity of the m_text_low and m_text_high fields. */
+
+ unsigned int text_low_valid : 1;
+ unsigned int text_high_valid : 1;
+};
+
+/* A partial symtab that tracks the "readin" and "compunit_symtab"
+ information in the ordinary way -- by storing it directly in this
+ object. */
+struct standard_psymtab : public partial_symtab
+{
+ standard_psymtab (const char *filename, struct objfile *objfile)
+ : partial_symtab (filename, objfile)
+ {
+ }
+
+ standard_psymtab (const char *filename, struct objfile *objfile,
+ CORE_ADDR addr)
+ : partial_symtab (filename, objfile, addr)
+ {
+ }
+
+ bool readin_p () const override
+ {
+ return readin;
+ }
+
+ /* Return a pointer to the compunit allocated for this source file.
+ Return nullptr if !readin or if there was no symtab. */
+ struct compunit_symtab *get_compunit_symtab () const override
+ {
+ return compunit_symtab;
+ }
+
+ /* True if the symtab corresponding to this psymtab has been
+ readin. */
+
+ bool readin = false;
+
+ /* Pointer to compunit eventually allocated for this source file, 0 if
!readin or if we haven't looked for the symtab after it was readin. */
- struct symtab *symtab;
+ struct compunit_symtab *compunit_symtab = nullptr;
+};
+
+/* A partial_symtab that works in the historical db way. This should
+ not be used in new code, but exists to transition the somewhat
+ unmaintained "legacy" debug formats. */
+
+struct legacy_psymtab : public standard_psymtab
+{
+ legacy_psymtab (const char *filename, struct objfile *objfile)
+ : standard_psymtab (filename, objfile)
+ {
+ }
+
+ legacy_psymtab (const char *filename, struct objfile *objfile,
+ CORE_ADDR addr)
+ : standard_psymtab (filename, objfile, addr)
+ {
+ }
+
+ void read_symtab (struct objfile *objf) override
+ {
+ if (legacy_read_symtab)
+ (*legacy_read_symtab) (this, objf);
+ }
+
+ void expand_psymtab (struct objfile *objf) override
+ {
+ (*legacy_expand_psymtab) (this, objf);
+ }
/* Pointer to function which will read in the symtab corresponding to
this psymtab. */
- void (*read_symtab) (struct partial_symtab *, struct objfile *);
+ void (*legacy_read_symtab) (legacy_psymtab *, struct objfile *) = nullptr;
+
+ /* Pointer to function which will actually expand this psymtab into
+ a full symtab. */
+
+ void (*legacy_expand_psymtab) (legacy_psymtab *, struct objfile *) = nullptr;
/* Information that lets read_symtab() locate the part of the symbol table
that this psymtab corresponds to. This information is private to the
format-dependent symbol reading routines. For further detail examine
the various symbol reading modules. */
- void *read_symtab_private;
+ void *read_symtab_private = nullptr;
+};
+
+/* Specify whether a partial psymbol should be allocated on the global
+ list or the static list. */
+
+enum class psymbol_placement
+{
+ STATIC,
+ GLOBAL
};
-extern void sort_pst_symbols (struct objfile *, struct partial_symtab *);
+/* Add a symbol to the partial symbol table of OBJFILE.
+
+ If COPY_NAME is true, make a copy of NAME, otherwise use the passed
+ reference.
+
+ THECLASS is the type of symbol.
+
+ SECTION is the index of the section of OBJFILE in which the symbol is found.
-/* Add any kind of symbol to a psymbol_allocation_list. */
+ WHERE determines whether the symbol goes in the list of static or global
+ partial symbols of OBJFILE.
-extern void add_psymbol_to_list (const char *, int,
- int, domain_enum,
- enum address_class,
- struct psymbol_allocation_list *,
- long, CORE_ADDR,
- enum language, struct objfile *);
+ COREADDR is the address of the symbol. For partial symbols that don't have
+ an address, zero is passed.
-extern void init_psymbol_list (struct objfile *, int);
+ LANGUAGE is the language from which the symbol originates. This will
+ influence, amongst other things, how the symbol name is demangled. */
-extern struct partial_symtab *start_psymtab_common (struct objfile *,
- struct section_offsets *,
- const char *, CORE_ADDR,
- struct partial_symbol **,
- struct partial_symbol **);
+extern void add_psymbol_to_list (gdb::string_view name,
+ bool copy_name, domain_enum domain,
+ enum address_class theclass,
+ short section,
+ psymbol_placement where,
+ CORE_ADDR coreaddr,
+ enum language language,
+ struct objfile *objfile);
-extern struct partial_symtab *allocate_psymtab (const char *,
- struct objfile *)
- ATTRIBUTE_NONNULL (1);
+/* Initialize storage for partial symbols. If partial symbol storage
+ has already been initialized, this does nothing. TOTAL_SYMBOLS is
+ an estimate of how many symbols there will be. */
-extern void discard_psymtab (struct objfile *, struct partial_symtab *);
+extern void init_psymbol_list (struct objfile *objfile, int total_symbols);
-extern struct cleanup *make_cleanup_discard_psymtabs (struct objfile *);
+extern void end_psymtab_common (struct objfile *, struct partial_symtab *);
-/* Traverse all psymtabs in one objfile. */
+/* Used when recording partial symbol tables. On destruction,
+ discards any partial symbol tables that have been built. However,
+ the tables can be kept by calling the "keep" method. */
+class psymtab_discarder
+{
+ public:
+
+ psymtab_discarder (struct objfile *objfile)
+ : m_objfile (objfile),
+ m_psymtab (objfile->partial_symtabs->psymtabs)
+ {
+ }
-#define ALL_OBJFILE_PSYMTABS(objfile, p) \
- for ((p) = (objfile) -> psymtabs; (p) != NULL; (p) = (p) -> next)
+ ~psymtab_discarder ()
+ {
+ if (m_objfile != NULL)
+ m_objfile->partial_symtabs->discard_psymtabs_to (m_psymtab);
+ }
+
+ /* Keep any partial symbol tables that were built. */
+ void keep ()
+ {
+ m_objfile = NULL;
+ }
+
+ private:
+
+ /* The objfile. If NULL this serves as a sentinel to indicate that
+ the psymtabs should be kept. */
+ struct objfile *m_objfile;
+ /* How far back to free. */
+ struct partial_symtab *m_psymtab;
+};
#endif /* PSYMPRIV_H */
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