mirror of
https://github.com/espressif/binutils-gdb.git
synced 2025-06-20 18:08:24 +08:00
2011-01-31 Paul Pluzhnikov <ppluzhnikov@google.com>
* breakpoint.h (remove_jit_event_breakpoints): New prototype. * breakpoint.c (remove_jit_event_breakpoints): New function. * jit.c (jit_descriptor_addr): Delete. (registering_code): Delete. (clear_int): Delete. (jit_inferior_data): New variable. (struct jit_inferior_data): New type. (get_jit_inferior_data): New function. (jit_inferior_data_cleanup): New function. (jit_read_descriptor): Adjust. (jit_register_code): Adjust. (jit_breakpoint_re_set_internal): New function; move code here ... (jit_inferior_init): ... from here. (jit_breakpoint_re_set): Adjust. (jit_reset_inferior_data_and_breakpoints): New function. (jit_inferior_created_observer): Adjust. (jit_inferior_exit_hook): Adjust. (jit_executable_changed_observer): New function. (jit_event_handler): Adjust. (_initialize_jit): Adjust.
This commit is contained in:
@ -5958,6 +5958,19 @@ create_jit_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address)
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return b;
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}
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/* Remove JIT code registration and unregistration breakpoint(s). */
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void
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remove_jit_event_breakpoints (void)
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{
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struct breakpoint *b, *b_tmp;
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ALL_BREAKPOINTS_SAFE (b, b_tmp)
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if (b->type == bp_jit_event
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&& b->loc->pspace == current_program_space)
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delete_breakpoint (b);
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}
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void
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remove_solib_event_breakpoints (void)
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{
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@ -1083,6 +1083,8 @@ extern struct breakpoint *create_solib_event_breakpoint (struct gdbarch *,
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extern struct breakpoint *create_thread_event_breakpoint (struct gdbarch *,
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CORE_ADDR);
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extern void remove_jit_event_breakpoints (void);
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extern void remove_solib_event_breakpoints (void);
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extern void remove_thread_event_breakpoints (void);
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199
gdb/jit.c
199
gdb/jit.c
@ -24,6 +24,7 @@
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#include "command.h"
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#include "gdbcmd.h"
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#include "gdbcore.h"
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#include "inferior.h"
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#include "observer.h"
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#include "objfiles.h"
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#include "symfile.h"
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@ -37,18 +38,7 @@ static const char *const jit_break_name = "__jit_debug_register_code";
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static const char *const jit_descriptor_name = "__jit_debug_descriptor";
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/* This is the address of the JIT descriptor in the inferior. */
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static CORE_ADDR jit_descriptor_addr = 0;
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/* This is a boolean indicating whether we're currently registering code. This
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is used to avoid re-entering the registration code. We want to check for
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new JITed every time a new object file is loaded, but we want to avoid
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checking for new code while we're registering object files for JITed code.
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Therefore, we flip this variable to 1 before registering new object files,
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and set it to 0 before returning. */
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static int registering_code = 0;
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static const struct inferior_data *jit_inferior_data = NULL;
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/* Non-zero if we want to see trace of jit level stuff. */
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@ -61,14 +51,6 @@ show_jit_debug (struct ui_file *file, int from_tty,
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fprintf_filtered (file, _("JIT debugging is %s.\n"), value);
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}
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/* Helper cleanup function to clear an integer flag like the one above. */
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static void
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clear_int (void *int_addr)
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{
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*((int *) int_addr) = 0;
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}
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struct target_buffer
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{
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CORE_ADDR base;
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@ -146,12 +128,47 @@ bfd_open_from_target_memory (CORE_ADDR addr, ULONGEST size, char *target)
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mem_bfd_iovec_stat);
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}
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/* Per-inferior structure recording the addresses in the inferior. */
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struct jit_inferior_data
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{
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CORE_ADDR breakpoint_addr; /* &__jit_debug_register_code() */
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CORE_ADDR descriptor_addr; /* &__jit_debug_descriptor */
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};
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/* Return jit_inferior_data for current inferior. Allocate if not already
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present. */
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static struct jit_inferior_data *
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get_jit_inferior_data (void)
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{
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struct inferior *inf;
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struct jit_inferior_data *inf_data;
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inf = current_inferior ();
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inf_data = inferior_data (inf, jit_inferior_data);
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if (inf_data == NULL)
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{
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inf_data = XZALLOC (struct jit_inferior_data);
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set_inferior_data (inf, jit_inferior_data, inf_data);
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}
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return inf_data;
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}
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static void
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jit_inferior_data_cleanup (struct inferior *inf, void *arg)
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{
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xfree (arg);
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}
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/* Helper function for reading the global JIT descriptor from remote
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memory. */
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static void
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jit_read_descriptor (struct gdbarch *gdbarch,
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struct jit_descriptor *descriptor)
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struct jit_descriptor *descriptor,
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CORE_ADDR descriptor_addr)
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{
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int err;
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struct type *ptr_type;
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@ -167,7 +184,7 @@ jit_read_descriptor (struct gdbarch *gdbarch,
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desc_buf = alloca (desc_size);
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/* Read the descriptor. */
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err = target_read_memory (jit_descriptor_addr, desc_buf, desc_size);
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err = target_read_memory (descriptor_addr, desc_buf, desc_size);
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if (err)
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error (_("Unable to read JIT descriptor from remote memory!"));
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@ -278,17 +295,9 @@ JITed symbol file is not an object file, ignoring it.\n"));
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++i;
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}
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/* Raise this flag while we register code so we won't trigger any
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re-registration. */
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registering_code = 1;
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my_cleanups = make_cleanup (clear_int, ®istering_code);
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/* This call takes ownership of sai. */
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objfile = symbol_file_add_from_bfd (nbfd, 0, sai, OBJF_SHARED);
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/* Clear the registering_code flag. */
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do_cleanups (my_cleanups);
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/* Remember a mapping from entry_addr to objfile. */
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entry_addr_ptr = xmalloc (sizeof (CORE_ADDR));
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*entry_addr_ptr = entry_addr;
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@ -323,68 +332,86 @@ jit_find_objf_with_entry_addr (CORE_ADDR entry_addr)
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return NULL;
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}
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/* (Re-)Initialize the jit breakpoint handler, and register any already
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created translations. */
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/* (Re-)Initialize the jit breakpoint if necessary.
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Return 0 on success. */
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static int
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jit_breakpoint_re_set_internal (struct gdbarch *gdbarch,
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struct jit_inferior_data *inf_data)
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{
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if (inf_data->breakpoint_addr == 0)
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{
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struct minimal_symbol *reg_symbol;
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/* Lookup the registration symbol. If it is missing, then we assume
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we are not attached to a JIT. */
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reg_symbol = lookup_minimal_symbol (jit_break_name, NULL, NULL);
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if (reg_symbol == NULL)
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return 1;
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inf_data->breakpoint_addr = SYMBOL_VALUE_ADDRESS (reg_symbol);
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if (inf_data->breakpoint_addr == 0)
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return 2;
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}
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else
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return 0;
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if (jit_debug)
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fprintf_unfiltered (gdb_stdlog,
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"jit_breakpoint_re_set_internal, "
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"breakpoint_addr = %s\n",
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paddress (gdbarch, inf_data->breakpoint_addr));
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/* Put a breakpoint in the registration symbol. */
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create_jit_event_breakpoint (gdbarch, inf_data->breakpoint_addr);
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return 0;
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}
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/* Register any already created translations. */
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static void
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jit_inferior_init (struct gdbarch *gdbarch)
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{
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struct minimal_symbol *reg_symbol;
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struct minimal_symbol *desc_symbol;
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CORE_ADDR reg_addr;
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struct jit_descriptor descriptor;
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struct jit_code_entry cur_entry;
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struct jit_inferior_data *inf_data;
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CORE_ADDR cur_entry_addr;
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if (jit_debug)
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fprintf_unfiltered (gdb_stdlog,
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"jit_inferior_init, registering_code = %d\n",
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registering_code);
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fprintf_unfiltered (gdb_stdlog, "jit_inferior_init\n");
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/* When we register code, GDB resets its breakpoints in case symbols have
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changed. That in turn calls this handler, which makes us look for new
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code again. To avoid being re-entered, we check this flag. */
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if (registering_code)
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inf_data = get_jit_inferior_data ();
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if (jit_breakpoint_re_set_internal (gdbarch, inf_data) != 0)
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return;
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/* Lookup the registration symbol. If it is missing, then we assume we are
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not attached to a JIT. */
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reg_symbol = lookup_minimal_symbol (jit_break_name, NULL, NULL);
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if (reg_symbol == NULL)
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return;
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reg_addr = SYMBOL_VALUE_ADDRESS (reg_symbol);
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if (reg_addr == 0)
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return;
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if (inf_data->descriptor_addr == 0)
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{
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struct minimal_symbol *desc_symbol;
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if (jit_debug)
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fprintf_unfiltered (gdb_stdlog, "jit_inferior_init, reg_addr = %s\n",
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paddress (gdbarch, reg_addr));
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/* Lookup the descriptor symbol and cache the addr. If it is
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missing, we assume we are not attached to a JIT and return early. */
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desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL, NULL);
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if (desc_symbol == NULL)
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return;
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/* Lookup the descriptor symbol and cache the addr. If it is missing, we
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assume we are not attached to a JIT and return early. */
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desc_symbol = lookup_minimal_symbol (jit_descriptor_name, NULL, NULL);
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if (desc_symbol == NULL)
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return;
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jit_descriptor_addr = SYMBOL_VALUE_ADDRESS (desc_symbol);
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if (jit_descriptor_addr == 0)
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return;
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inf_data->descriptor_addr = SYMBOL_VALUE_ADDRESS (desc_symbol);
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if (inf_data->descriptor_addr == 0)
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return;
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}
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if (jit_debug)
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fprintf_unfiltered (gdb_stdlog,
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"jit_inferior_init, jit_descriptor_addr = %s\n",
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paddress (gdbarch, jit_descriptor_addr));
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"jit_inferior_init, descriptor_addr = %s\n",
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paddress (gdbarch, inf_data->descriptor_addr));
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/* Read the descriptor so we can check the version number and load
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any already JITed functions. */
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jit_read_descriptor (gdbarch, &descriptor);
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jit_read_descriptor (gdbarch, &descriptor, inf_data->descriptor_addr);
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/* Check that the version number agrees with that we support. */
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if (descriptor.version != 1)
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error (_("Unsupported JIT protocol version in descriptor!"));
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/* Put a breakpoint in the registration symbol. */
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create_jit_event_breakpoint (gdbarch, reg_addr);
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/* If we've attached to a running program, we need to check the descriptor
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to register any functions that were already generated. */
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for (cur_entry_addr = descriptor.first_entry;
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@ -416,6 +443,26 @@ jit_inferior_created_hook (void)
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void
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jit_breakpoint_re_set (void)
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{
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jit_breakpoint_re_set_internal (target_gdbarch,
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get_jit_inferior_data ());
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}
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/* Reset inferior_data, so sybols will be looked up again, and jit_breakpoint
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will be reset. */
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static void
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jit_reset_inferior_data_and_breakpoints (void)
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{
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struct jit_inferior_data *inf_data;
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/* Force jit_inferior_init to re-lookup of jit symbol addresses. */
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inf_data = get_jit_inferior_data ();
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inf_data->breakpoint_addr = 0;
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inf_data->descriptor_addr = 0;
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/* Remove any existing JIT breakpoint(s). */
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remove_jit_event_breakpoints ();
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jit_inferior_init (target_gdbarch);
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}
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@ -424,7 +471,7 @@ jit_breakpoint_re_set (void)
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static void
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jit_inferior_created_observer (struct target_ops *objfile, int from_tty)
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{
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jit_inferior_init (target_gdbarch);
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jit_reset_inferior_data_and_breakpoints ();
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}
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/* This function cleans up any code entries left over when the
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@ -437,15 +484,17 @@ jit_inferior_exit_hook (struct inferior *inf)
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struct objfile *objf;
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struct objfile *temp;
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/* We need to reset the descriptor addr so that next time we load up the
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inferior we look for it again. */
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jit_descriptor_addr = 0;
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ALL_OBJFILES_SAFE (objf, temp)
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if (objfile_data (objf, jit_objfile_data) != NULL)
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jit_unregister_code (objf);
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}
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static void
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jit_executable_changed_observer (void)
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{
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jit_reset_inferior_data_and_breakpoints ();
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}
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void
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jit_event_handler (struct gdbarch *gdbarch)
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{
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@ -455,7 +504,8 @@ jit_event_handler (struct gdbarch *gdbarch)
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struct objfile *objf;
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/* Read the descriptor from remote memory. */
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jit_read_descriptor (gdbarch, &descriptor);
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jit_read_descriptor (gdbarch, &descriptor,
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get_jit_inferior_data ()->descriptor_addr);
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entry_addr = descriptor.relevant_entry;
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/* Do the corresponding action. */
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@ -500,5 +550,8 @@ _initialize_jit (void)
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observer_attach_inferior_created (jit_inferior_created_observer);
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observer_attach_inferior_exit (jit_inferior_exit_hook);
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observer_attach_executable_changed (jit_executable_changed_observer);
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jit_objfile_data = register_objfile_data ();
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jit_inferior_data =
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register_inferior_data_with_cleanup (jit_inferior_data_cleanup);
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}
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