/* Handle JIT code generation in the inferior for GDB, the GNU Debugger.
- Copyright (C) 2009-2015 Free Software Foundation, Inc.
+ Copyright (C) 2009-2017 Free Software Foundation, Inc.
This file is part of GDB.
#include "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 const struct program_space_data *jit_program_space_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
/* 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 = XNEW (struct target_buffer);
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 = XCNEW (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)
{
- 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."));
- if (IS_ABSOLUTE_PATH (args))
- so_name = xstrdup (args);
- else
- so_name = xstrprintf ("%s%s%s", jit_reader_dir, SLASH_STRING, args);
- prev_cleanup = make_cleanup (xfree, so_name);
+ if (!IS_ABSOLUTE_PATH (file.get ()))
+ file.reset (xstrprintf ("%s%s%s", jit_reader_dir, 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. */
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;
}
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
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,
priv_data = (jit_dbg_reader_data *) cb->priv_data;
- objfile = allocate_objfile (NULL, "<< JIT compiled code >>",
- OBJF_NOT_FILENAME);
+ objfile = new struct objfile (NULL, "<< JIT compiled code >>",
+ OBJF_NOT_FILENAME);
objfile->per_bfd->gdbarch = target_gdbarch ();
terminate_minimal_symbol_table (objfile);
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;
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
CORE_ADDR entry_addr,
struct gdbarch *gdbarch)
{
- bfd *nbfd;
struct section_addr_info *sai;
struct bfd_section *sec;
struct objfile *objfile;
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));
+ sai = alloc_section_addr_info (bfd_count_sections (nbfd.get ()));
old_cleanups = make_cleanup_free_section_addr_info (sai);
i = 0;
for (sec = nbfd->sections; sec != NULL; sec = sec->next)
- if ((bfd_get_section_flags (nbfd, sec) & (SEC_ALLOC|SEC_LOAD)) != 0)
+ if ((bfd_get_section_flags (nbfd.get (), 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].addr = bfd_get_section_vma (nbfd.get (), sec);
+ sai->other[i].name = xstrdup (bfd_get_section_name (nbfd.get (), sec));
sai->other[i].sectindex = sec->index;
++i;
}
sai->num_sections = i;
/* This call does not take ownership of SAI. */
- make_cleanup_bfd_unref (nbfd);
- objfile = symbol_file_add_from_bfd (nbfd, bfd_get_filename (nbfd), 0, sai,
+ 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);
static void
jit_unregister_code (struct objfile *objfile)
{
- free_objfile (objfile);
+ delete objfile;
}
/* Look up the objfile with this code entry address. */
}
/* (Re-)Initialize the jit breakpoint if necessary.
- Return 0 on success. */
+ Return 0 if the jit breakpoint has been successfully initialized. */
static int
jit_breakpoint_re_set_internal (struct gdbarch *gdbarch,
paddress (gdbarch, addr));
if (ps_data->cached_code_address == addr)
- return 1;
+ return 0;
/* Delete the old breakpoint. */
if (ps_data->jit_breakpoint != NULL)
{
/* Cached register values. See jit_frame_sniffer to see how this
works. */
- struct gdb_reg_value **registers;
+ struct regcache *regcache;
/* The frame being unwound. */
struct frame_info *this_frame;
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;
+ regcache_raw_set_cached_value (priv->regcache, gdb_reg, value->value);
+ value->free (value);
}
static void
jit_dealloc_cache (struct frame_info *this_frame, void *cache)
{
struct jit_unwind_private *priv_data = (struct jit_unwind_private *) cache;
- struct gdbarch *frame_arch;
- int i;
-
- gdb_assert (priv_data->registers);
- frame_arch = get_frame_arch (priv_data->this_frame);
-
- 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);
}
struct jit_unwind_private *priv_data;
struct gdb_unwind_callbacks callbacks;
struct gdb_reader_funcs *funcs;
+ struct address_space *aspace;
+ struct gdbarch *gdbarch;
callbacks.reg_get = jit_unwind_reg_get_impl;
callbacks.reg_set = jit_unwind_reg_set_impl;
gdb_assert (!*cache);
+ aspace = get_frame_address_space (this_frame);
+ gdbarch = get_frame_arch (this_frame);
+
*cache = XCNEW (struct jit_unwind_private);
priv_data = (struct jit_unwind_private *) *cache;
- priv_data->registers =
- XCNEWVEC (struct gdb_reg_value *,
- gdbarch_num_regs (get_frame_arch (this_frame)));
+ priv_data->regcache = new regcache (gdbarch, aspace);
priv_data->this_frame = this_frame;
callbacks.priv_data = priv_data;
struct gdb_reader_funcs *funcs;
struct gdb_unwind_callbacks callbacks;
- priv.registers = NULL;
+ priv.regcache = NULL;
priv.this_frame = this_frame;
/* We don't expect the frame_id function to set any registers, so we
jit_frame_prev_register (struct frame_info *this_frame, void **cache, int reg)
{
struct jit_unwind_private *priv = (struct jit_unwind_private *) *cache;
- struct gdb_reg_value *value;
+ 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 ();
+ if (reg < gdbarch_num_regs (gdbarch))
+ {
+ gdb_byte *buf = (gdb_byte *) alloca (register_size (gdbarch, reg));
+ enum register_status status;
+
+ status = regcache_raw_read (priv->regcache, reg, buf);
+ if (status == REG_VALID)
+ return frame_unwind_got_bytes (this_frame, reg, buf);
+ else
+ return frame_unwind_got_optimized (this_frame, reg);
+ }
else
- return frame_unwind_got_optimized (this_frame, reg);
+ return gdbarch_pseudo_register_read_value (gdbarch, priv->regcache, reg);
}
/* Relay everything back to the unwinder registered by the JIT debug
}
}
+/* 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
= ((struct jit_program_space_data *)
program_space_data (objfile->pspace, jit_program_space_data));
if (ps_data != NULL && ps_data->objfile == objfile)
- ps_data->objfile = NULL;
+ {
+ ps_data->objfile = NULL;
+ delete_breakpoint (ps_data->jit_breakpoint);
+ ps_data->cached_code_address = 0;
+ }
}
xfree (data);
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_created (jit_inferior_created);
observer_attach_inferior_exit (jit_inferior_exit_hook);
observer_attach_breakpoint_deleted (jit_breakpoint_deleted);
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);
}
}
projects / deliverable / binutils-gdb.git / blobdiff