/* Handle JIT code generation in the inferior for GDB, the GNU Debugger.
- Copyright (C) 2009-2012 Free Software Foundation, Inc.
+ Copyright (C) 2009-2019 Free Software Foundation, Inc.
This file is part of GDB.
#include "breakpoint.h"
#include "command.h"
#include "dictionary.h"
+#include "filenames.h"
#include "frame-unwind.h"
#include "gdbcmd.h"
#include "gdbcore.h"
#include "inferior.h"
-#include "observer.h"
+#include "observable.h"
#include "objfiles.h"
#include "regcache.h"
#include "symfile.h"
#include "symtab.h"
#include "target.h"
-#include "gdb-dlfcn.h"
-#include "gdb_stat.h"
-#include "exceptions.h"
+#include "gdbsupport/gdb-dlfcn.h"
+#include <sys/stat.h>
#include "gdb_bfd.h"
+#include "readline/tilde.h"
+#include "completer.h"
-static const char *jit_reader_dir = NULL;
+static std::string jit_reader_dir;
static const struct objfile_data *jit_objfile_data;
static const char *const jit_descriptor_name = "__jit_debug_descriptor";
-static const struct inferior_data *jit_inferior_data = NULL;
-
static void jit_inferior_init (struct gdbarch *gdbarch);
+static void jit_inferior_exit_hook (struct inferior *inf);
/* An unwinder is registered for every gdbarch. This key is used to
remember if the unwinder has been registered for a particular
ULONGEST size;
};
-/* Openning the file is a no-op. */
+/* Opening the file is a no-op. */
static void *
mem_bfd_iovec_open (struct bfd *abfd, void *open_closure)
mem_bfd_iovec_close (struct bfd *abfd, void *stream)
{
xfree (stream);
- return 1;
+
+ /* Zero means success. */
+ return 0;
}
/* For reading the file, we just need to pass through to target_read_memory and
{
struct target_buffer *buffer = (struct target_buffer*) stream;
+ memset (sb, 0, sizeof (struct stat));
sb->st_size = buffer->size;
return 0;
}
/* Open a BFD from the target's memory. */
-static struct bfd *
+static gdb_bfd_ref_ptr
bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, char *target)
{
- struct target_buffer *buffer = xmalloc (sizeof (struct target_buffer));
+ struct target_buffer *buffer = XNEW (struct target_buffer);
buffer->base = addr;
buffer->size = size;
mem_bfd_iovec_stat);
}
+struct jit_reader
+{
+ jit_reader (struct gdb_reader_funcs *f, gdb_dlhandle_up &&h)
+ : functions (f), handle (std::move (h))
+ {
+ }
+
+ ~jit_reader ()
+ {
+ functions->destroy (functions);
+ }
+
+ DISABLE_COPY_AND_ASSIGN (jit_reader);
+
+ struct gdb_reader_funcs *functions;
+ gdb_dlhandle_up handle;
+};
+
/* One reader that has been loaded successfully, and can potentially be used to
parse debug info. */
-static struct jit_reader
-{
- struct gdb_reader_funcs *functions;
- void *handle;
-} *loaded_jit_reader = NULL;
+static struct jit_reader *loaded_jit_reader = NULL;
typedef struct gdb_reader_funcs * (reader_init_fn_type) (void);
static const char *reader_init_fn_sym = "gdb_init_reader";
static struct jit_reader *
jit_reader_load (const char *file_name)
{
- void *so;
reader_init_fn_type *init_fn;
- struct jit_reader *new_reader = NULL;
struct gdb_reader_funcs *funcs = NULL;
- struct cleanup *old_cleanups;
if (jit_debug)
fprintf_unfiltered (gdb_stdlog, _("Opening shared object %s.\n"),
file_name);
- so = gdb_dlopen (file_name);
- old_cleanups = make_cleanup_dlclose (so);
+ gdb_dlhandle_up so = gdb_dlopen (file_name);
- init_fn = gdb_dlsym (so, reader_init_fn_sym);
+ init_fn = (reader_init_fn_type *) gdb_dlsym (so, reader_init_fn_sym);
if (!init_fn)
error (_("Could not locate initialization function: %s."),
reader_init_fn_sym);
if (funcs->reader_version != GDB_READER_INTERFACE_VERSION)
error (_("Reader version does not match GDB version."));
- new_reader = XZALLOC (struct jit_reader);
- new_reader->functions = funcs;
- new_reader->handle = so;
-
- discard_cleanups (old_cleanups);
- return new_reader;
+ return new jit_reader (funcs, std::move (so));
}
/* Provides the jit-reader-load command. */
static void
-jit_reader_load_command (char *args, int from_tty)
+jit_reader_load_command (const char *args, int from_tty)
{
- char *so_name;
- struct cleanup *prev_cleanup;
-
if (args == NULL)
error (_("No reader name provided."));
+ gdb::unique_xmalloc_ptr<char> file (tilde_expand (args));
if (loaded_jit_reader != NULL)
error (_("JIT reader already loaded. Run jit-reader-unload first."));
- so_name = xstrprintf ("%s/%s", jit_reader_dir, args);
- prev_cleanup = make_cleanup (xfree, so_name);
+ if (!IS_ABSOLUTE_PATH (file.get ()))
+ file.reset (xstrprintf ("%s%s%s", jit_reader_dir.c_str (), SLASH_STRING,
+ file.get ()));
- loaded_jit_reader = jit_reader_load (so_name);
- do_cleanups (prev_cleanup);
+ loaded_jit_reader = jit_reader_load (file.get ());
+ reinit_frame_cache ();
+ jit_inferior_created_hook ();
}
/* Provides the jit-reader-unload command. */
static void
-jit_reader_unload_command (char *args, int from_tty)
+jit_reader_unload_command (const char *args, int from_tty)
{
if (!loaded_jit_reader)
error (_("No JIT reader loaded."));
- loaded_jit_reader->functions->destroy (loaded_jit_reader->functions);
+ reinit_frame_cache ();
+ jit_inferior_exit_hook (current_inferior ());
- gdb_dlclose (loaded_jit_reader->handle);
- xfree (loaded_jit_reader);
+ delete loaded_jit_reader;
loaded_jit_reader = NULL;
}
-/* Per-inferior structure recording which objfile has the JIT
+/* Per-program space structure recording which objfile has the JIT
symbols. */
-struct jit_inferior_data
+struct jit_program_space_data
{
/* The objfile. This is NULL if no objfile holds the JIT
symbols. */
- struct objfile *objfile;
+ struct objfile *objfile = nullptr;
+
+ /* If this program space has __jit_debug_register_code, this is the
+ cached address from the minimal symbol. This is used to detect
+ relocations requiring the breakpoint to be re-created. */
+
+ CORE_ADDR cached_code_address = 0;
+
+ /* This is the JIT event breakpoint, or NULL if it has not been
+ set. */
+
+ struct breakpoint *jit_breakpoint = nullptr;
};
-/* Per-objfile structure recording the addresses in the inferior. */
+static program_space_key<jit_program_space_data> jit_program_space_key;
+
+/* Per-objfile structure recording the addresses in the program space.
+ This object serves two purposes: for ordinary objfiles, it may
+ cache some symbols related to the JIT interface; and for
+ JIT-created objfiles, it holds some information about the
+ jit_code_entry. */
struct jit_objfile_data
{
/* Symbol for __jit_debug_descriptor. */
struct minimal_symbol *descriptor;
- /* Address of struct jit_code_entry in this objfile. */
+ /* Address of struct jit_code_entry in this objfile. This is only
+ non-zero for objfiles that represent code created by the JIT. */
CORE_ADDR addr;
};
{
struct jit_objfile_data *objf_data;
- objf_data = objfile_data (objf, jit_objfile_data);
+ objf_data = (struct jit_objfile_data *) objfile_data (objf, jit_objfile_data);
if (objf_data == NULL)
{
- objf_data = XZALLOC (struct jit_objfile_data);
+ objf_data = XCNEW (struct jit_objfile_data);
set_objfile_data (objf, jit_objfile_data, objf_data);
}
objf_data->addr = entry;
}
-/* Return jit_inferior_data for current inferior. Allocate if not already
- present. */
+/* Return jit_program_space_data for current program space. Allocate
+ if not already present. */
-static struct jit_inferior_data *
-get_jit_inferior_data (void)
+static struct jit_program_space_data *
+get_jit_program_space_data ()
{
- struct inferior *inf;
- struct jit_inferior_data *inf_data;
+ struct jit_program_space_data *ps_data;
- inf = current_inferior ();
- inf_data = inferior_data (inf, jit_inferior_data);
- if (inf_data == NULL)
- {
- inf_data = XZALLOC (struct jit_inferior_data);
- set_inferior_data (inf, jit_inferior_data, inf_data);
- }
-
- return inf_data;
-}
-
-static void
-jit_inferior_data_cleanup (struct inferior *inf, void *arg)
-{
- xfree (arg);
+ ps_data = jit_program_space_key.get (current_program_space);
+ if (ps_data == NULL)
+ ps_data = jit_program_space_key.emplace (current_program_space);
+ return ps_data;
}
/* Helper function for reading the global JIT descriptor from remote
static int
jit_read_descriptor (struct gdbarch *gdbarch,
struct jit_descriptor *descriptor,
- struct jit_inferior_data *inf_data)
+ struct jit_program_space_data *ps_data)
{
int err;
struct type *ptr_type;
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
struct jit_objfile_data *objf_data;
- if (inf_data->objfile == NULL)
+ if (ps_data->objfile == NULL)
return 0;
- objf_data = get_jit_objfile_data (inf_data->objfile);
+ objf_data = get_jit_objfile_data (ps_data->objfile);
if (objf_data->descriptor == NULL)
return 0;
if (jit_debug)
fprintf_unfiltered (gdb_stdlog,
"jit_read_descriptor, descriptor_addr = %s\n",
- paddress (gdbarch, SYMBOL_VALUE_ADDRESS (objf_data->descriptor)));
+ paddress (gdbarch, MSYMBOL_VALUE_ADDRESS (ps_data->objfile,
+ objf_data->descriptor)));
/* Figure out how big the descriptor is on the remote and how to read it. */
ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
ptr_size = TYPE_LENGTH (ptr_type);
desc_size = 8 + 2 * ptr_size; /* Two 32-bit ints and two pointers. */
- desc_buf = alloca (desc_size);
+ desc_buf = (gdb_byte *) alloca (desc_size);
/* Read the descriptor. */
- err = target_read_memory (SYMBOL_VALUE_ADDRESS (objf_data->descriptor),
+ err = target_read_memory (MSYMBOL_VALUE_ADDRESS (ps_data->objfile,
+ objf_data->descriptor),
desc_buf, desc_size);
if (err)
{
ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
ptr_size = TYPE_LENGTH (ptr_type);
- /* Figure out where the longlong value will be. */
- align_bytes = gdbarch_long_long_align_bit (gdbarch) / 8;
+ /* Figure out where the uint64_t value will be. */
+ align_bytes = type_align (builtin_type (gdbarch)->builtin_uint64);
off = 3 * ptr_size;
off = (off + (align_bytes - 1)) & ~(align_bytes - 1);
entry_size = off + 8; /* Three pointers and one 64-bit int. */
- entry_buf = alloca (entry_size);
+ entry_buf = (gdb_byte *) alloca (entry_size);
/* Read the entry. */
err = target_read_memory (code_addr, entry_buf, entry_size);
static enum gdb_status
jit_target_read_impl (GDB_CORE_ADDR target_mem, void *gdb_buf, int len)
{
- int result = target_read_memory ((CORE_ADDR) target_mem, gdb_buf, len);
+ int result = target_read_memory ((CORE_ADDR) target_mem,
+ (gdb_byte *) gdb_buf, len);
if (result == 0)
return GDB_SUCCESS;
else
/* 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 XZALLOC (struct gdb_object);
+ return XCNEW (struct gdb_object);
}
/* Readers call into this function to open a new gdb_symtab, which,
/* CB stays unused. See comment in jit_object_open_impl. */
- ret = XZALLOC (struct gdb_symtab);
+ ret = XCNEW (struct gdb_symtab);
ret->file_name = file_name ? xstrdup (file_name) : xstrdup ("");
ret->next = object->symtabs;
object->symtabs = ret;
static int
compare_block (const struct gdb_block *const old,
- const struct gdb_block *const new)
+ const struct gdb_block *const newobj)
{
if (old == NULL)
return 1;
- if (old->begin < new->begin)
+ if (old->begin < newobj->begin)
return 1;
- else if (old->begin == new->begin)
+ else if (old->begin == newobj->begin)
{
- if (old->end > new->end)
+ if (old->end > newobj->end)
return 1;
else
return 0;
struct gdb_symtab *symtab, struct gdb_block *parent,
GDB_CORE_ADDR begin, GDB_CORE_ADDR end, const char *name)
{
- struct gdb_block *block = XZALLOC (struct gdb_block);
+ struct gdb_block *block = XCNEW (struct gdb_block);
block->next = symtab->blocks;
block->begin = (CORE_ADDR) begin;
struct gdb_line_mapping *map)
{
int i;
+ int alloc_len;
if (nlines < 1)
return;
- stab->linetable = xmalloc (sizeof (struct linetable)
- + (nlines - 1) * sizeof (struct linetable_entry));
+ alloc_len = sizeof (struct linetable)
+ + (nlines - 1) * sizeof (struct linetable_entry);
+ stab->linetable = (struct linetable *) xmalloc (alloc_len);
stab->linetable->nitems = nlines;
for (i = 0; i < nlines; i++)
{
static void
finalize_symtab (struct gdb_symtab *stab, struct objfile *objfile)
{
- struct symtab *symtab;
+ struct compunit_symtab *cust;
struct gdb_block *gdb_block_iter, *gdb_block_iter_tmp;
struct block *block_iter;
- int actual_nblocks, i, blockvector_size;
+ int actual_nblocks, i;
+ size_t blockvector_size;
CORE_ADDR begin, end;
+ struct blockvector *bv;
actual_nblocks = FIRST_LOCAL_BLOCK + stab->nblocks;
- symtab = allocate_symtab (stab->file_name, objfile);
+ cust = allocate_compunit_symtab (objfile, stab->file_name);
+ allocate_symtab (cust, stab->file_name);
+ add_compunit_symtab_to_objfile (cust);
+
/* JIT compilers compile in memory. */
- symtab->dirname = NULL;
+ COMPUNIT_DIRNAME (cust) = NULL;
/* Copy over the linetable entry if one was provided. */
if (stab->linetable)
{
- int size = ((stab->linetable->nitems - 1)
- * sizeof (struct linetable_entry)
- + sizeof (struct linetable));
- LINETABLE (symtab) = obstack_alloc (&objfile->objfile_obstack, size);
- memcpy (LINETABLE (symtab), stab->linetable, size);
- }
- else
- {
- LINETABLE (symtab) = NULL;
+ size_t size = ((stab->linetable->nitems - 1)
+ * sizeof (struct linetable_entry)
+ + 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);
}
blockvector_size = (sizeof (struct blockvector)
+ (actual_nblocks - 1) * sizeof (struct block *));
- symtab->blockvector = obstack_alloc (&objfile->objfile_obstack,
- blockvector_size);
+ bv = (struct blockvector *) obstack_alloc (&objfile->objfile_obstack,
+ blockvector_size);
+ COMPUNIT_BLOCKVECTOR (cust) = bv;
/* (begin, end) will contain the PC range this entire blockvector
spans. */
- symtab->primary = 1;
- BLOCKVECTOR_MAP (symtab->blockvector) = NULL;
+ BLOCKVECTOR_MAP (bv) = NULL;
begin = stab->blocks->begin;
end = stab->blocks->end;
- BLOCKVECTOR_NBLOCKS (symtab->blockvector) = actual_nblocks;
+ 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
i--, gdb_block_iter = gdb_block_iter->next)
{
struct block *new_block = allocate_block (&objfile->objfile_obstack);
- struct symbol *block_name = obstack_alloc (&objfile->objfile_obstack,
- sizeof (struct symbol));
+ struct symbol *block_name = allocate_symbol (objfile);
struct type *block_type = arch_type (get_objfile_arch (objfile),
TYPE_CODE_VOID,
- 1,
+ TARGET_CHAR_BIT,
"void");
- BLOCK_DICT (new_block) = dict_create_linear (&objfile->objfile_obstack,
- NULL);
+ 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;
/* The name. */
- memset (block_name, 0, sizeof (struct symbol));
SYMBOL_DOMAIN (block_name) = VAR_DOMAIN;
- SYMBOL_CLASS (block_name) = LOC_BLOCK;
- SYMBOL_SYMTAB (block_name) = symtab;
+ SYMBOL_ACLASS_INDEX (block_name) = LOC_BLOCK;
+ symbol_set_symtab (block_name, COMPUNIT_FILETABS (cust));
SYMBOL_TYPE (block_name) = lookup_function_type (block_type);
SYMBOL_BLOCK_VALUE (block_name) = new_block;
- block_name->ginfo.name = obsavestring (gdb_block_iter->name,
- strlen (gdb_block_iter->name),
- &objfile->objfile_obstack);
+ block_name->ginfo.name = obstack_strdup (&objfile->objfile_obstack,
+ gdb_block_iter->name);
BLOCK_FUNCTION (new_block) = block_name;
- BLOCKVECTOR_BLOCK (symtab->blockvector, i) = new_block;
+ BLOCKVECTOR_BLOCK (bv, i) = new_block;
if (begin > BLOCK_START (new_block))
begin = BLOCK_START (new_block);
if (end < BLOCK_END (new_block))
new_block = (i == GLOBAL_BLOCK
? allocate_global_block (&objfile->objfile_obstack)
: allocate_block (&objfile->objfile_obstack));
- BLOCK_DICT (new_block) = dict_create_linear (&objfile->objfile_obstack,
- NULL);
+ BLOCK_MULTIDICT (new_block)
+ = mdict_create_linear (&objfile->objfile_obstack, NULL);
BLOCK_SUPERBLOCK (new_block) = block_iter;
block_iter = new_block;
BLOCK_START (new_block) = (CORE_ADDR) begin;
BLOCK_END (new_block) = (CORE_ADDR) end;
- BLOCKVECTOR_BLOCK (symtab->blockvector, i) = new_block;
+ BLOCKVECTOR_BLOCK (bv, i) = new_block;
if (i == GLOBAL_BLOCK)
- set_block_symtab (new_block, symtab);
+ set_block_compunit_symtab (new_block, cust);
}
/* Fill up the superblock fields for the real blocks, using the
gdb_block_iter = gdb_block_iter->next)
{
if (gdb_block_iter->parent != NULL)
- BLOCK_SUPERBLOCK (gdb_block_iter->real_block) =
- gdb_block_iter->parent->real_block;
+ {
+ /* If the plugin specifically mentioned a parent block, we
+ use that. */
+ 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) =
+ BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK);
+ }
}
/* Free memory. */
struct objfile *objfile;
jit_dbg_reader_data *priv_data;
- priv_data = cb->priv_data;
-
- objfile = allocate_objfile (NULL, 0);
- objfile->gdbarch = target_gdbarch;
+ priv_data = (jit_dbg_reader_data *) cb->priv_data;
- terminate_minimal_symbol_table (objfile);
-
- objfile->name = "<< JIT compiled code >>";
+ objfile = new struct objfile (NULL, "<< JIT compiled code >>",
+ OBJF_NOT_FILENAME);
+ objfile->per_bfd->gdbarch = target_gdbarch ();
j = NULL;
for (i = obj->symtabs; i; i = j)
jit_reader_try_read_symtab (struct jit_code_entry *code_entry,
CORE_ADDR entry_addr)
{
- void *gdb_mem;
+ gdb_byte *gdb_mem;
int status;
jit_dbg_reader_data priv_data;
struct gdb_reader_funcs *funcs;
- volatile struct gdb_exception e;
struct gdb_symbol_callbacks callbacks =
{
jit_object_open_impl,
if (!loaded_jit_reader)
return 0;
- gdb_mem = xmalloc (code_entry->symfile_size);
+ gdb_mem = (gdb_byte *) xmalloc (code_entry->symfile_size);
status = 1;
- TRY_CATCH (e, RETURN_MASK_ALL)
- if (target_read_memory (code_entry->symfile_addr, gdb_mem,
- code_entry->symfile_size))
+ try
+ {
+ if (target_read_memory (code_entry->symfile_addr, gdb_mem,
+ code_entry->symfile_size))
+ status = 0;
+ }
+ catch (const gdb_exception &e)
+ {
status = 0;
- if (e.reason < 0)
- status = 0;
+ }
if (status)
{
CORE_ADDR entry_addr,
struct gdbarch *gdbarch)
{
- bfd *nbfd;
- struct section_addr_info *sai;
struct bfd_section *sec;
struct objfile *objfile;
- struct cleanup *old_cleanups;
- int i;
const struct bfd_arch_info *b;
if (jit_debug)
paddress (gdbarch, code_entry->symfile_addr),
pulongest (code_entry->symfile_size));
- nbfd = bfd_open_from_target_memory (code_entry->symfile_addr,
- code_entry->symfile_size, gnutarget);
+ gdb_bfd_ref_ptr nbfd (bfd_open_from_target_memory (code_entry->symfile_addr,
+ code_entry->symfile_size,
+ gnutarget));
if (nbfd == NULL)
{
puts_unfiltered (_("Error opening JITed symbol file, ignoring it.\n"));
/* Check the format. NOTE: This initializes important data that GDB uses!
We would segfault later without this line. */
- if (!bfd_check_format (nbfd, bfd_object))
+ if (!bfd_check_format (nbfd.get (), bfd_object))
{
printf_unfiltered (_("\
JITed symbol file is not an object file, ignoring it.\n"));
- gdb_bfd_unref (nbfd);
return;
}
/* Check bfd arch. */
b = gdbarch_bfd_arch_info (gdbarch);
- if (b->compatible (b, bfd_get_arch_info (nbfd)) != b)
+ if (b->compatible (b, bfd_get_arch_info (nbfd.get ())) != b)
warning (_("JITed object file architecture %s is not compatible "
- "with target architecture %s."), bfd_get_arch_info
- (nbfd)->printable_name, b->printable_name);
+ "with target architecture %s."),
+ bfd_get_arch_info (nbfd.get ())->printable_name,
+ b->printable_name);
/* Read the section address information out of the symbol file. Since the
file is generated by the JIT at runtime, it should all of the absolute
addresses that we care about. */
- sai = alloc_section_addr_info (bfd_count_sections (nbfd));
- old_cleanups = make_cleanup_free_section_addr_info (sai);
- i = 0;
+ section_addr_info sai;
for (sec = nbfd->sections; sec != NULL; sec = sec->next)
- if ((bfd_get_section_flags (nbfd, sec) & (SEC_ALLOC|SEC_LOAD)) != 0)
+ if ((bfd_section_flags (sec) & (SEC_ALLOC|SEC_LOAD)) != 0)
{
/* We assume that these virtual addresses are absolute, and do not
treat them as offsets. */
- sai->other[i].addr = bfd_get_section_vma (nbfd, sec);
- sai->other[i].name = xstrdup (bfd_get_section_name (nbfd, sec));
- sai->other[i].sectindex = sec->index;
- ++i;
+ sai.emplace_back (bfd_section_vma (sec),
+ bfd_section_name (sec),
+ sec->index);
}
/* This call does not take ownership of SAI. */
- make_cleanup_bfd_unref (nbfd);
- objfile = symbol_file_add_from_bfd (nbfd, 0, sai, OBJF_SHARED, NULL);
+ objfile = symbol_file_add_from_bfd (nbfd.get (),
+ bfd_get_filename (nbfd.get ()), 0,
+ &sai,
+ OBJF_SHARED | OBJF_NOT_FILENAME, NULL);
- do_cleanups (old_cleanups);
add_objfile_entry (objfile, entry_addr);
}
jit_register_code (struct gdbarch *gdbarch,
CORE_ADDR entry_addr, struct jit_code_entry *code_entry)
{
- int i, success;
- const struct bfd_arch_info *b;
- struct jit_inferior_data *inf_data = get_jit_inferior_data ();
+ int success;
if (jit_debug)
fprintf_unfiltered (gdb_stdlog,
static void
jit_unregister_code (struct objfile *objfile)
{
- free_objfile (objfile);
+ delete objfile;
}
/* Look up the objfile with this code entry address. */
static struct objfile *
jit_find_objf_with_entry_addr (CORE_ADDR entry_addr)
{
- struct objfile *objf;
-
- ALL_OBJFILES (objf)
+ for (objfile *objf : current_program_space->objfiles ())
{
struct jit_objfile_data *objf_data;
- objf_data = objfile_data (objf, jit_objfile_data);
+ objf_data
+ = (struct jit_objfile_data *) objfile_data (objf, jit_objfile_data);
if (objf_data != NULL && objf_data->addr == entry_addr)
return objf;
}
return NULL;
}
-/* (Re-)Initialize the jit breakpoint if necessary.
- Return 0 on success. */
+/* This is called when a breakpoint is deleted. It updates the
+ inferior's cache, if needed. */
-static int
-jit_breakpoint_re_set_internal (struct gdbarch *gdbarch,
- struct jit_inferior_data *inf_data)
+static void
+jit_breakpoint_deleted (struct breakpoint *b)
{
- struct minimal_symbol *reg_symbol, *desc_symbol;
- struct objfile *objf;
- struct jit_objfile_data *objf_data;
+ struct bp_location *iter;
- if (inf_data->objfile != NULL)
- return 0;
+ if (b->type != bp_jit_event)
+ return;
- /* Lookup the registration symbol. If it is missing, then we assume
- we are not attached to a JIT. */
- reg_symbol = lookup_minimal_symbol_and_objfile (jit_break_name, &objf);
- if (reg_symbol == NULL || SYMBOL_VALUE_ADDRESS (reg_symbol) == 0)
- return 1;
+ for (iter = b->loc; iter != NULL; iter = iter->next)
+ {
+ struct jit_program_space_data *ps_data;
+
+ ps_data = jit_program_space_key.get (iter->pspace);
+ if (ps_data != NULL && ps_data->jit_breakpoint == iter->owner)
+ {
+ ps_data->cached_code_address = 0;
+ ps_data->jit_breakpoint = NULL;
+ }
+ }
+}
- desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL, objf);
- if (desc_symbol == NULL || SYMBOL_VALUE_ADDRESS (desc_symbol) == 0)
- return 1;
+/* (Re-)Initialize the jit breakpoint if necessary.
+ Return 0 if the jit breakpoint has been successfully initialized. */
- objf_data = get_jit_objfile_data (objf);
- objf_data->register_code = reg_symbol;
- objf_data->descriptor = desc_symbol;
+static int
+jit_breakpoint_re_set_internal (struct gdbarch *gdbarch,
+ struct jit_program_space_data *ps_data)
+{
+ struct bound_minimal_symbol reg_symbol;
+ struct bound_minimal_symbol desc_symbol;
+ struct jit_objfile_data *objf_data;
+ CORE_ADDR addr;
- inf_data->objfile = objf;
+ if (ps_data->objfile == NULL)
+ {
+ /* Lookup the registration symbol. If it is missing, then we
+ assume we are not attached to a JIT. */
+ reg_symbol = lookup_bound_minimal_symbol (jit_break_name);
+ if (reg_symbol.minsym == NULL
+ || BMSYMBOL_VALUE_ADDRESS (reg_symbol) == 0)
+ return 1;
+
+ desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL,
+ reg_symbol.objfile);
+ if (desc_symbol.minsym == NULL
+ || BMSYMBOL_VALUE_ADDRESS (desc_symbol) == 0)
+ return 1;
+
+ objf_data = get_jit_objfile_data (reg_symbol.objfile);
+ objf_data->register_code = reg_symbol.minsym;
+ objf_data->descriptor = desc_symbol.minsym;
+
+ ps_data->objfile = reg_symbol.objfile;
+ }
+ else
+ objf_data = get_jit_objfile_data (ps_data->objfile);
- jit_inferior_init (gdbarch);
+ addr = MSYMBOL_VALUE_ADDRESS (ps_data->objfile, objf_data->register_code);
if (jit_debug)
fprintf_unfiltered (gdb_stdlog,
"jit_breakpoint_re_set_internal, "
"breakpoint_addr = %s\n",
- paddress (gdbarch, SYMBOL_VALUE_ADDRESS (reg_symbol)));
+ paddress (gdbarch, addr));
+
+ if (ps_data->cached_code_address == addr)
+ return 0;
+
+ /* Delete the old breakpoint. */
+ if (ps_data->jit_breakpoint != NULL)
+ delete_breakpoint (ps_data->jit_breakpoint);
/* Put a breakpoint in the registration symbol. */
- create_jit_event_breakpoint (gdbarch, SYMBOL_VALUE_ADDRESS (reg_symbol));
+ ps_data->cached_code_address = addr;
+ ps_data->jit_breakpoint = create_jit_event_breakpoint (gdbarch, addr);
return 0;
}
{
/* Cached register values. See jit_frame_sniffer to see how this
works. */
- struct gdb_reg_value **registers;
+ detached_regcache *regcache;
/* The frame being unwound. */
struct frame_info *this_frame;
struct jit_unwind_private *priv;
int gdb_reg;
- priv = cb->priv_data;
+ priv = (struct jit_unwind_private *) cb->priv_data;
gdb_reg = gdbarch_dwarf2_reg_to_regnum (get_frame_arch (priv->this_frame),
dwarf_regnum);
fprintf_unfiltered (gdb_stdlog,
_("Could not recognize DWARF regnum %d"),
dwarf_regnum);
+ value->free (value);
return;
}
- gdb_assert (priv->registers);
- priv->registers[gdb_reg] = value;
+ priv->regcache->raw_supply (gdb_reg, value->value);
+ value->free (value);
}
static void
int gdb_reg, size;
struct gdbarch *frame_arch;
- priv = cb->priv_data;
+ priv = (struct jit_unwind_private *) cb->priv_data;
frame_arch = get_frame_arch (priv->this_frame);
gdb_reg = gdbarch_dwarf2_reg_to_regnum (frame_arch, regnum);
size = register_size (frame_arch, gdb_reg);
- value = xmalloc (sizeof (struct gdb_reg_value) + size - 1);
- value->defined = frame_register_read (priv->this_frame, gdb_reg,
- value->value);
+ value = ((struct gdb_reg_value *)
+ xmalloc (sizeof (struct gdb_reg_value) + size - 1));
+ value->defined = deprecated_frame_register_read (priv->this_frame, gdb_reg,
+ value->value);
value->size = size;
value->free = reg_value_free_impl;
return value;
static void
jit_dealloc_cache (struct frame_info *this_frame, void *cache)
{
- struct jit_unwind_private *priv_data = cache;
- struct gdbarch *frame_arch;
- int i;
-
- gdb_assert (priv_data->registers);
- frame_arch = get_frame_arch (priv_data->this_frame);
+ struct jit_unwind_private *priv_data = (struct jit_unwind_private *) cache;
- for (i = 0; i < gdbarch_num_regs (frame_arch); i++)
- if (priv_data->registers[i] && priv_data->registers[i]->free)
- priv_data->registers[i]->free (priv_data->registers[i]);
-
- xfree (priv_data->registers);
+ gdb_assert (priv_data->regcache != NULL);
+ delete priv_data->regcache;
xfree (priv_data);
}
jit_frame_sniffer (const struct frame_unwind *self,
struct frame_info *this_frame, void **cache)
{
- struct jit_inferior_data *inf_data;
struct jit_unwind_private *priv_data;
struct gdb_unwind_callbacks callbacks;
struct gdb_reader_funcs *funcs;
- inf_data = get_jit_inferior_data ();
-
callbacks.reg_get = jit_unwind_reg_get_impl;
callbacks.reg_set = jit_unwind_reg_set_impl;
callbacks.target_read = jit_target_read_impl;
gdb_assert (!*cache);
- *cache = XZALLOC (struct jit_unwind_private);
- priv_data = *cache;
- priv_data->registers =
- XCALLOC (gdbarch_num_regs (get_frame_arch (this_frame)),
- struct gdb_reg_value *);
+ *cache = XCNEW (struct jit_unwind_private);
+ priv_data = (struct jit_unwind_private *) *cache;
+ /* Take a snapshot of current regcache. */
+ priv_data->regcache = new detached_regcache (get_frame_arch (this_frame),
+ true);
priv_data->this_frame = this_frame;
callbacks.priv_data = priv_data;
jit_frame_this_id (struct frame_info *this_frame, void **cache,
struct frame_id *this_id)
{
- struct jit_unwind_private private;
+ struct jit_unwind_private priv;
struct gdb_frame_id frame_id;
struct gdb_reader_funcs *funcs;
struct gdb_unwind_callbacks callbacks;
- private.registers = NULL;
- private.this_frame = this_frame;
+ priv.regcache = NULL;
+ priv.this_frame = this_frame;
/* We don't expect the frame_id function to set any registers, so we
set reg_set to NULL. */
callbacks.reg_get = jit_unwind_reg_get_impl;
callbacks.reg_set = NULL;
callbacks.target_read = jit_target_read_impl;
- callbacks.priv_data = &private;
+ callbacks.priv_data = &priv;
gdb_assert (loaded_jit_reader);
funcs = loaded_jit_reader->functions;
static struct value *
jit_frame_prev_register (struct frame_info *this_frame, void **cache, int reg)
{
- struct jit_unwind_private *priv = *cache;
- struct gdb_reg_value *value;
+ struct jit_unwind_private *priv = (struct jit_unwind_private *) *cache;
+ struct gdbarch *gdbarch;
if (priv == NULL)
return frame_unwind_got_optimized (this_frame, reg);
- gdb_assert (priv->registers);
- value = priv->registers[reg];
- if (value && value->defined)
- return frame_unwind_got_bytes (this_frame, reg, value->value);
+ gdbarch = priv->regcache->arch ();
+ gdb_byte *buf = (gdb_byte *) alloca (register_size (gdbarch, reg));
+ enum register_status status = priv->regcache->cooked_read (reg, buf);
+
+ if (status == REG_VALID)
+ return frame_unwind_got_bytes (this_frame, reg, buf);
else
return frame_unwind_got_optimized (this_frame, reg);
}
{
struct jit_gdbarch_data_type *data;
- data = gdbarch_data (gdbarch, jit_gdbarch_data);
+ data
+ = (struct jit_gdbarch_data_type *) gdbarch_data (gdbarch, jit_gdbarch_data);
if (!data->unwinder_registered)
{
frame_unwind_prepend_unwinder (gdbarch, &jit_frame_unwind);
{
struct jit_descriptor descriptor;
struct jit_code_entry cur_entry;
- struct jit_inferior_data *inf_data;
+ struct jit_program_space_data *ps_data;
CORE_ADDR cur_entry_addr;
if (jit_debug)
jit_prepend_unwinder (gdbarch);
- inf_data = get_jit_inferior_data ();
- if (jit_breakpoint_re_set_internal (gdbarch, inf_data) != 0)
+ ps_data = get_jit_program_space_data ();
+ if (jit_breakpoint_re_set_internal (gdbarch, ps_data) != 0)
return;
/* Read the descriptor so we can check the version number and load
any already JITed functions. */
- if (!jit_read_descriptor (gdbarch, &descriptor, inf_data))
+ if (!jit_read_descriptor (gdbarch, &descriptor, ps_data))
return;
/* Check that the version number agrees with that we support. */
}
}
+/* inferior_created observer. */
+
+static void
+jit_inferior_created (struct target_ops *ops, int from_tty)
+{
+ jit_inferior_created_hook ();
+}
+
/* Exported routine to call when an inferior has been created. */
void
jit_inferior_created_hook (void)
{
- jit_inferior_init (target_gdbarch);
+ jit_inferior_init (target_gdbarch ());
}
/* Exported routine to call to re-set the jit breakpoints,
void
jit_breakpoint_re_set (void)
{
- jit_breakpoint_re_set_internal (target_gdbarch,
- get_jit_inferior_data ());
+ jit_breakpoint_re_set_internal (target_gdbarch (),
+ get_jit_program_space_data ());
}
/* This function cleans up any code entries left over when the
static void
jit_inferior_exit_hook (struct inferior *inf)
{
- struct objfile *objf;
- struct objfile *temp;
-
- ALL_OBJFILES_SAFE (objf, temp)
+ for (objfile *objf : current_program_space->objfiles_safe ())
{
- struct jit_objfile_data *objf_data = objfile_data (objf,
- jit_objfile_data);
+ struct jit_objfile_data *objf_data
+ = (struct jit_objfile_data *) objfile_data (objf, jit_objfile_data);
if (objf_data != NULL && objf_data->addr != 0)
jit_unregister_code (objf);
struct objfile *objf;
/* Read the descriptor from remote memory. */
- if (!jit_read_descriptor (gdbarch, &descriptor, get_jit_inferior_data ()))
+ if (!jit_read_descriptor (gdbarch, &descriptor,
+ get_jit_program_space_data ()))
return;
entry_addr = descriptor.relevant_entry;
}
}
-/* Called to free the data allocated to the jit_inferior_data slot. */
+/* Called to free the data allocated to the jit_program_space_data slot. */
static void
free_objfile_data (struct objfile *objfile, void *data)
{
- struct jit_objfile_data *objf_data = data;
+ struct jit_objfile_data *objf_data = (struct jit_objfile_data *) data;
if (objf_data->register_code != NULL)
{
- struct jit_inferior_data *inf_data = get_jit_inferior_data ();
-
- if (inf_data->objfile == objfile)
- inf_data->objfile = NULL;
+ struct jit_program_space_data *ps_data;
+
+ ps_data = jit_program_space_key.get (objfile->pspace);
+ if (ps_data != NULL && ps_data->objfile == objfile)
+ {
+ ps_data->objfile = NULL;
+ if (ps_data->jit_breakpoint != NULL)
+ delete_breakpoint (ps_data->jit_breakpoint);
+ ps_data->cached_code_address = 0;
+ }
}
xfree (data);
static void *
jit_gdbarch_data_init (struct obstack *obstack)
{
- struct jit_gdbarch_data_type *data;
+ struct jit_gdbarch_data_type *data =
+ XOBNEW (obstack, struct jit_gdbarch_data_type);
- data = obstack_alloc (obstack, sizeof (struct jit_gdbarch_data_type));
data->unwinder_registered = 0;
+
return data;
}
-/* Provide a prototype to silence -Wmissing-prototypes. */
-
-extern void _initialize_jit (void);
-
void
_initialize_jit (void)
{
show_jit_debug,
&setdebuglist, &showdebuglist);
- observer_attach_inferior_exit (jit_inferior_exit_hook);
+ gdb::observers::inferior_created.attach (jit_inferior_created);
+ gdb::observers::inferior_exit.attach (jit_inferior_exit_hook);
+ gdb::observers::breakpoint_deleted.attach (jit_breakpoint_deleted);
+
jit_objfile_data =
register_objfile_data_with_cleanup (NULL, free_objfile_data);
- jit_inferior_data =
- register_inferior_data_with_cleanup (NULL, jit_inferior_data_cleanup);
jit_gdbarch_data = gdbarch_data_register_pre_init (jit_gdbarch_data_init);
if (is_dl_available ())
{
- add_com ("jit-reader-load", no_class, jit_reader_load_command, _("\
+ struct cmd_list_element *c;
+
+ c = add_com ("jit-reader-load", no_class, jit_reader_load_command, _("\
Load FILE as debug info reader and unwinder for JIT compiled code.\n\
Usage: jit-reader-load FILE\n\
Try to load file FILE as a debug info reader (and unwinder) for\n\
JIT compiled code. The file is loaded from " JIT_READER_DIR ",\n\
relocated relative to the GDB executable if required."));
- add_com ("jit-reader-unload", no_class, jit_reader_unload_command, _("\
+ set_cmd_completer (c, filename_completer);
+
+ c = add_com ("jit-reader-unload", no_class,
+ jit_reader_unload_command, _("\
Unload the currently loaded JIT debug info reader.\n\
-Usage: jit-reader-unload FILE\n\n\
+Usage: jit-reader-unload\n\n\
Do \"help jit-reader-load\" for info on loading debug info readers."));
+ set_cmd_completer (c, noop_completer);
}
}