#include "gdb_bfd.h"
#include "readline/tilde.h"
#include "completer.h"
+#include <forward_list>
static std::string jit_reader_dir;
struct gdb_block
{
- /* gdb_blocks are linked into a tree structure. Next points to the
- next node at the same depth as this block and parent to the
- parent gdb_block. */
- struct gdb_block *next, *parent;
+ gdb_block (gdb_block *parent, CORE_ADDR begin, CORE_ADDR end,
+ const char *name)
+ : parent (parent),
+ begin (begin),
+ end (end),
+ name (name != nullptr ? xstrdup (name) : nullptr)
+ {}
+
+ /* The parent of this block. */
+ struct gdb_block *parent;
/* Points to the "real" block that is being built out of this
instance. This block will be added to a blockvector, which will
then be added to a symtab. */
- struct block *real_block;
+ struct block *real_block = nullptr;
/* The first and last code address corresponding to this block. */
CORE_ADDR begin, end;
/* The name of this block (if any). If this is non-NULL, the
FUNCTION symbol symbol is set to this value. */
- const char *name;
+ gdb::unique_xmalloc_ptr<char> name;
};
/* Proxy object for building a symtab. */
struct gdb_symtab
{
+ explicit gdb_symtab (const char *file_name)
+ : file_name (file_name != nullptr ? file_name : "")
+ {}
+
/* The list of blocks in this symtab. These will eventually be
- converted to real blocks. */
- struct gdb_block *blocks;
+ converted to real blocks.
+
+ This is specifically a linked list, instead of, for example, a vector,
+ because the pointers are returned to the user's debug info reader. So
+ it's important that the objects don't change location during their
+ lifetime (which would happen with a vector of objects getting resized). */
+ std::forward_list<gdb_block> blocks;
/* The number of blocks inserted. */
- int nblocks;
+ int nblocks = 0;
/* A mapping between line numbers to PC. */
- struct linetable *linetable;
+ gdb::unique_xmalloc_ptr<struct linetable> linetable;
/* The source file for this symtab. */
- const char *file_name;
- struct gdb_symtab *next;
+ std::string file_name;
};
/* Proxy object for building an object. */
struct gdb_object
{
- struct gdb_symtab *symtabs;
+ /* Symtabs of this object.
+
+ This is specifically a linked list, instead of, for example, a vector,
+ because the pointers are returned to the user's debug info reader. So
+ it's important that the objects don't change location during their
+ lifetime (which would happen with a vector of objects getting resized). */
+ std::forward_list<gdb_symtab> symtabs;
};
/* The type of the `private' data passed around by the callback
/* CB is not required right now, but sometime in the future we might
need a handle to it, and we'd like to do that without breaking
the ABI. */
- return XCNEW (struct gdb_object);
+ return new gdb_object;
}
/* Readers call into this function to open a new gdb_symtab, which,
struct gdb_object *object,
const char *file_name)
{
- struct gdb_symtab *ret;
-
/* CB stays unused. See comment in jit_object_open_impl. */
- ret = XCNEW (struct gdb_symtab);
- ret->file_name = file_name ? xstrdup (file_name) : xstrdup ("");
- ret->next = object->symtabs;
- object->symtabs = ret;
- return ret;
-}
-
-/* Returns true if the block corresponding to old should be placed
- before the block corresponding to new in the final blockvector. */
-
-static int
-compare_block (const struct gdb_block *const old,
- const struct gdb_block *const newobj)
-{
- if (old == NULL)
- return 1;
- if (old->begin < newobj->begin)
- return 1;
- else if (old->begin == newobj->begin)
- {
- if (old->end > newobj->end)
- return 1;
- else
- return 0;
- }
- else
- return 0;
+ object->symtabs.emplace_front (file_name);
+ return &object->symtabs.front ();
}
/* Called by readers to open a new gdb_block. This function also
struct gdb_symtab *symtab, struct gdb_block *parent,
GDB_CORE_ADDR begin, GDB_CORE_ADDR end, const char *name)
{
- struct gdb_block *block = XCNEW (struct gdb_block);
-
- block->next = symtab->blocks;
- block->begin = (CORE_ADDR) begin;
- block->end = (CORE_ADDR) end;
- block->name = name ? xstrdup (name) : NULL;
- block->parent = parent;
-
- /* Ensure that the blocks are inserted in the correct (reverse of
- the order expected by blockvector). */
- if (compare_block (symtab->blocks, block))
- {
- symtab->blocks = block;
- }
- else
- {
- struct gdb_block *i = symtab->blocks;
-
- for (;; i = i->next)
- {
- /* Guaranteed to terminate, since compare_block (NULL, _)
- returns 1. */
- if (compare_block (i->next, block))
- {
- block->next = i->next;
- i->next = block;
- break;
- }
- }
- }
+ /* Place the block at the beginning of the list, it will be sorted when the
+ symtab is finalized. */
+ symtab->blocks.emplace_front (parent, begin, end, name);
symtab->nblocks++;
- return block;
+ return &symtab->blocks.front ();
}
/* Readers call this to add a line mapping (from PC to line number) to
alloc_len = sizeof (struct linetable)
+ (nlines - 1) * sizeof (struct linetable_entry);
- stab->linetable = (struct linetable *) xmalloc (alloc_len);
+ stab->linetable.reset (XNEWVAR (struct linetable, alloc_len));
stab->linetable->nitems = nlines;
for (i = 0; i < nlines; i++)
{
finalize_symtab (struct gdb_symtab *stab, struct objfile *objfile)
{
struct compunit_symtab *cust;
- struct gdb_block *gdb_block_iter, *gdb_block_iter_tmp;
- struct block *block_iter;
- int actual_nblocks, i;
size_t blockvector_size;
CORE_ADDR begin, end;
struct blockvector *bv;
- actual_nblocks = FIRST_LOCAL_BLOCK + stab->nblocks;
+ int actual_nblocks = FIRST_LOCAL_BLOCK + stab->nblocks;
+
+ /* Sort the blocks in the order they should appear in the blockvector. */
+ stab->blocks.sort([] (const gdb_block &a, const gdb_block &b)
+ {
+ if (a.begin != b.begin)
+ return a.begin < b.begin;
- cust = allocate_compunit_symtab (objfile, stab->file_name);
- allocate_symtab (cust, stab->file_name);
+ return a.end > b.end;
+ });
+
+ cust = allocate_compunit_symtab (objfile, stab->file_name.c_str ());
+ allocate_symtab (cust, stab->file_name.c_str ());
add_compunit_symtab_to_objfile (cust);
/* JIT compilers compile in memory. */
+ sizeof (struct linetable));
SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust))
= (struct linetable *) obstack_alloc (&objfile->objfile_obstack, size);
- memcpy (SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust)), stab->linetable,
- size);
+ memcpy (SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust)),
+ stab->linetable.get (), size);
}
blockvector_size = (sizeof (struct blockvector)
blockvector_size);
COMPUNIT_BLOCKVECTOR (cust) = bv;
- /* (begin, end) will contain the PC range this entire blockvector
- spans. */
+ /* At the end of this function, (begin, end) will contain the PC range this
+ entire blockvector spans. */
BLOCKVECTOR_MAP (bv) = NULL;
- begin = stab->blocks->begin;
- end = stab->blocks->end;
+ begin = stab->blocks.front ().begin;
+ end = stab->blocks.front ().end;
BLOCKVECTOR_NBLOCKS (bv) = actual_nblocks;
/* First run over all the gdb_block objects, creating a real block
object for each. Simultaneously, keep setting the real_block
fields. */
- for (i = (actual_nblocks - 1), gdb_block_iter = stab->blocks;
- i >= FIRST_LOCAL_BLOCK;
- i--, gdb_block_iter = gdb_block_iter->next)
+ int block_idx = FIRST_LOCAL_BLOCK;
+ for (gdb_block &gdb_block_iter : stab->blocks)
{
struct block *new_block = allocate_block (&objfile->objfile_obstack);
struct symbol *block_name = allocate_symbol (objfile);
BLOCK_MULTIDICT (new_block)
= mdict_create_linear (&objfile->objfile_obstack, NULL);
/* The address range. */
- BLOCK_START (new_block) = (CORE_ADDR) gdb_block_iter->begin;
- BLOCK_END (new_block) = (CORE_ADDR) gdb_block_iter->end;
+ BLOCK_START (new_block) = (CORE_ADDR) gdb_block_iter.begin;
+ BLOCK_END (new_block) = (CORE_ADDR) gdb_block_iter.end;
/* The name. */
SYMBOL_DOMAIN (block_name) = VAR_DOMAIN;
SYMBOL_BLOCK_VALUE (block_name) = new_block;
block_name->name = obstack_strdup (&objfile->objfile_obstack,
- gdb_block_iter->name);
+ gdb_block_iter.name.get ());
BLOCK_FUNCTION (new_block) = block_name;
- BLOCKVECTOR_BLOCK (bv, i) = new_block;
+ BLOCKVECTOR_BLOCK (bv, block_idx) = new_block;
if (begin > BLOCK_START (new_block))
begin = BLOCK_START (new_block);
if (end < BLOCK_END (new_block))
end = BLOCK_END (new_block);
- gdb_block_iter->real_block = new_block;
+ gdb_block_iter.real_block = new_block;
+
+ block_idx++;
}
/* Now add the special blocks. */
- block_iter = NULL;
- for (i = 0; i < FIRST_LOCAL_BLOCK; i++)
+ struct block *block_iter = NULL;
+ for (enum block_enum i : { GLOBAL_BLOCK, STATIC_BLOCK })
{
struct block *new_block;
/* Fill up the superblock fields for the real blocks, using the
real_block fields populated earlier. */
- for (gdb_block_iter = stab->blocks;
- gdb_block_iter;
- gdb_block_iter = gdb_block_iter->next)
+ for (gdb_block &gdb_block_iter : stab->blocks)
{
- if (gdb_block_iter->parent != NULL)
+ if (gdb_block_iter.parent != NULL)
{
/* If the plugin specifically mentioned a parent block, we
use that. */
- BLOCK_SUPERBLOCK (gdb_block_iter->real_block) =
- gdb_block_iter->parent->real_block;
+ BLOCK_SUPERBLOCK (gdb_block_iter.real_block) =
+ gdb_block_iter.parent->real_block;
}
else
{
/* And if not, we set a default parent block. */
- BLOCK_SUPERBLOCK (gdb_block_iter->real_block) =
+ BLOCK_SUPERBLOCK (gdb_block_iter.real_block) =
BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
}
}
-
- /* Free memory. */
- gdb_block_iter = stab->blocks;
-
- for (gdb_block_iter = stab->blocks, gdb_block_iter_tmp = gdb_block_iter->next;
- gdb_block_iter;
- gdb_block_iter = gdb_block_iter_tmp)
- {
- xfree ((void *) gdb_block_iter->name);
- xfree (gdb_block_iter);
- }
- xfree (stab->linetable);
- xfree ((char *) stab->file_name);
- xfree (stab);
}
/* Called when closing a gdb_objfile. Converts OBJ to a proper
jit_object_close_impl (struct gdb_symbol_callbacks *cb,
struct gdb_object *obj)
{
- struct gdb_symtab *i, *j;
struct objfile *objfile;
jit_dbg_reader_data *priv_data;
OBJF_NOT_FILENAME);
objfile->per_bfd->gdbarch = target_gdbarch ();
- j = NULL;
- for (i = obj->symtabs; i; i = j)
- {
- j = i->next;
- finalize_symtab (i, objfile);
- }
+ for (gdb_symtab &symtab : obj->symtabs)
+ finalize_symtab (&symtab, objfile);
+
add_objfile_entry (objfile, *priv_data);
- xfree (obj);
+
+ delete obj;
}
/* Try to read CODE_ENTRY using the loaded jit reader (if any).
projects / deliverable / binutils-gdb.git / blobdiff