diff options
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/ChangeLog | 9 | ||||
| -rw-r--r-- | gdb/jit.c | 100 |
2 files changed, 109 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index ff269ff..faed934 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,14 @@ 2011-11-20 Sanjoy Das <sdas@igalia.com> + * jit.c: Include gdb-dlfcn.h. + (loaded_jit_reader, reader_init_fn_sym): New static variables. + (jit_reader_load, jit_reader_load_command) + (jit_reader_unload_command): New functions. + (_initialize_jit): Add commands "jit-reader-load" and + "jit-reader-unload". + +2011-11-20 Sanjoy Das <sdas@igalia.com> + * Makefile.in: Add gdb-dlfcn.c and gdb-dlfcn.h to build system. * config.in: Add new #define HAVE_LIBDL. * configure.ac: Add check for -ldl. @@ -31,6 +31,7 @@ #include "symfile.h" #include "symtab.h" #include "target.h" +#include "gdb-dlfcn.h" #include "gdb_stat.h" static const char *jit_reader_dir = NULL; @@ -115,6 +116,92 @@ mem_bfd_iovec_stat (struct bfd *abfd, void *stream, struct stat *sb) return 0; } +/* 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; + +typedef struct gdb_reader_funcs * (reader_init_fn_type) (void); +static const char *reader_init_fn_sym = "gdb_init_reader"; + +/* Try to load FILE_NAME as a JIT debug info 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); + + init_fn = gdb_dlsym (so, reader_init_fn_sym); + if (!init_fn) + error (_("Could not locate initialization function: %s."), + reader_init_fn_sym); + + if (gdb_dlsym (so, "plugin_is_GPL_compatible") == NULL) + error (_("Reader not GPL compatible.")); + + funcs = init_fn (); + 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; +} + +/* Provides the jit-reader-load command. */ + +static void +jit_reader_load_command (char *args, int from_tty) +{ + char *so_name; + int len; + struct cleanup *prev_cleanup; + + if (args == NULL) + error (_("No reader name provided.")); + + 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); + + loaded_jit_reader = jit_reader_load (so_name); + do_cleanups (prev_cleanup); +} + +/* Provides the jit-reader-unload command. */ + +static void +jit_reader_unload_command (char *args, int from_tty) +{ + if (!loaded_jit_reader) + error (_("No JIT reader loaded.")); + + loaded_jit_reader->functions->destroy (loaded_jit_reader->functions); + + gdb_dlclose (loaded_jit_reader->handle); + xfree (loaded_jit_reader); + loaded_jit_reader = NULL; +} + /* Open a BFD from the target's memory. */ static struct bfd * @@ -576,4 +663,17 @@ _initialize_jit (void) jit_objfile_data = register_objfile_data (); jit_inferior_data = register_inferior_data_with_cleanup (jit_inferior_data_cleanup); + if (is_dl_available ()) + { + 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, _("\ +Unload the currently loaded JIT debug info reader.\n\ +Usage: jit-reader-unload FILE\n\n\ +Do \"help jit-reader-load\" for info on loading debug info readers.")); + } } |