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2010-04-20 Stan Shebs <stan@codesourcery.com>
Nathan Sidwell <nathan@codesourcery.com> * dwarf2loc.c (struct axs_var_loc): New struct. (dwarf2_tracepoint_var_loc): New function. (dwarf2_tracepoint_var_access): New function. (dwarf2_tracepoint_var_ref): Use dwarf2_tracepoint_var_loc, deal with DW_OP_piece. (locexpr_describe_location_piece): New function. (locexpr_describe_location_1): New function. (locexpr_describe_location): Call it, update signature. (loclist_describe_location): Rewrite to loop over locations, update signature. * symtab.h (struct symbol_computed_ops): Add address to describe_location arguments, return void. * printcmd.c (address_info): Get context PC, pass to computed location description. * tracepoint.c (scope_info): Ditto. * ax-gdb.c (trace_kludge): Export.
This commit is contained in:
Stan Shebs
parent
2dc7f7b33b
commit
08922a1050
@ -1,3 +1,23 @@
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2010-04-20 Stan Shebs <stan@codesourcery.com>
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Nathan Sidwell <nathan@codesourcery.com>
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* dwarf2loc.c (struct axs_var_loc): New struct.
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(dwarf2_tracepoint_var_loc): New function.
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(dwarf2_tracepoint_var_access): New function.
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(dwarf2_tracepoint_var_ref): Use dwarf2_tracepoint_var_loc, deal
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with DW_OP_piece.
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(locexpr_describe_location_piece): New function.
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(locexpr_describe_location_1): New function.
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(locexpr_describe_location): Call it, update signature.
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(loclist_describe_location): Rewrite to loop over locations,
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update signature.
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* symtab.h (struct symbol_computed_ops): Add address to
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describe_location arguments, return void.
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* printcmd.c (address_info): Get context PC, pass to computed
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location description.
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* tracepoint.c (scope_info): Ditto.
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* ax-gdb.c (trace_kludge): Export.
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2010-04-20 Tom Tromey <tromey@redhat.com>
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* dwarf2-frame.c (decode_frame_entry_1): Handle CIE version 4.
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@ -329,7 +329,7 @@ maybe_const_expr (union exp_element **pc)
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Setting the flag trace_kludge to non-zero enables the code that
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emits the trace bytecodes at the appropriate points. */
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static int trace_kludge;
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int trace_kludge;
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/* Scan for all static fields in the given class, including any base
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classes, and generate tracing bytecodes for each. */
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557
gdb/dwarf2loc.c
557
gdb/dwarf2loc.c
@ -614,28 +614,47 @@ dwarf2_loc_desc_needs_frame (gdb_byte *data, unsigned short size,
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return baton.needs_frame || in_reg;
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}
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static void
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dwarf2_tracepoint_var_ref (struct symbol *symbol, struct gdbarch *gdbarch,
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struct agent_expr *ax, struct axs_value *value,
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gdb_byte *data, int size)
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/* This struct keeps track of the pieces that make up a multi-location
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object, for use in agent expression generation. It is
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superficially similar to struct dwarf_expr_piece, but
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dwarf_expr_piece is designed for use in immediate evaluation, and
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does not, for example, have a way to record both base register and
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offset. */
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struct axs_var_loc
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{
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if (!data || size == 0)
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/* Memory vs register, etc */
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enum axs_lvalue_kind kind;
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/* If non-zero, number of bytes in this fragment */
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unsigned bytes;
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/* (GDB-numbered) reg, or base reg if >= 0 */
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int reg;
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/* offset from reg */
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LONGEST offset;
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};
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static gdb_byte *
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dwarf2_tracepoint_var_loc (struct symbol *symbol,
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struct agent_expr *ax,
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struct axs_var_loc *loc,
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struct gdbarch *gdbarch,
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gdb_byte *data, gdb_byte *end)
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{
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if (data[0] >= DW_OP_reg0 && data[0] <= DW_OP_reg31)
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{
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value->optimized_out = 1;
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}
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else if (size == 1
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&& data[0] >= DW_OP_reg0
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&& data[0] <= DW_OP_reg31)
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{
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value->kind = axs_lvalue_register;
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value->u.reg = data[0] - DW_OP_reg0;
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loc->kind = axs_lvalue_register;
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loc->reg = gdbarch_dwarf2_reg_to_regnum (gdbarch, data[0] - DW_OP_reg0);
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data += 1;
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}
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else if (data[0] == DW_OP_regx)
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{
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ULONGEST reg;
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read_uleb128 (data + 1, data + size, ®);
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value->kind = axs_lvalue_register;
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value->u.reg = reg;
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data = read_uleb128 (data + 1, end, ®);
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loc->kind = axs_lvalue_register;
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loc->reg = gdbarch_dwarf2_reg_to_regnum (gdbarch, reg);
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}
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else if (data[0] == DW_OP_fbreg)
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{
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@ -643,7 +662,6 @@ dwarf2_tracepoint_var_ref (struct symbol *symbol, struct gdbarch *gdbarch,
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struct symbol *framefunc;
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int frame_reg = 0;
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LONGEST frame_offset;
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gdb_byte *buf_end;
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gdb_byte *base_data;
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size_t base_size;
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LONGEST base_offset = 0;
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@ -661,57 +679,202 @@ dwarf2_tracepoint_var_ref (struct symbol *symbol, struct gdbarch *gdbarch,
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dwarf_expr_frame_base_1 (framefunc, ax->scope,
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&base_data, &base_size);
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if (base_data[0] >= DW_OP_breg0
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&& base_data[0] <= DW_OP_breg31)
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if (base_data[0] >= DW_OP_breg0 && base_data[0] <= DW_OP_breg31)
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{
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gdb_byte *buf_end;
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frame_reg = base_data[0] - DW_OP_breg0;
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buf_end = read_sleb128 (base_data + 1, base_data + base_size, &base_offset);
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buf_end = read_sleb128 (base_data + 1,
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base_data + base_size, &base_offset);
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if (buf_end != base_data + base_size)
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error (_("Unexpected opcode after DW_OP_breg%u for symbol \"%s\"."),
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frame_reg, SYMBOL_PRINT_NAME (symbol));
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}
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else if (base_data[0] >= DW_OP_reg0 && base_data[0] <= DW_OP_reg31)
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{
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/* The frame base is just the register, with no offset. */
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frame_reg = base_data[0] - DW_OP_reg0;
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base_offset = 0;
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}
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else
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{
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/* We don't know what to do with the frame base expression,
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so we can't trace this variable; give up. */
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error (_("Cannot generate expression to collect symbol \"%s\"; DWARF 2 encoding not handled"),
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SYMBOL_PRINT_NAME (symbol));
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error (_("Cannot generate expression to collect symbol \"%s\"; DWARF 2 encoding not handled, first opcode in base data is 0x%x."),
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SYMBOL_PRINT_NAME (symbol), base_data[0]);
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}
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buf_end = read_sleb128 (data + 1, data + size, &frame_offset);
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if (buf_end != data + size)
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error (_("Unexpected opcode after DW_OP_fbreg for symbol \"%s\"."),
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SYMBOL_PRINT_NAME (symbol));
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data = read_sleb128 (data + 1, end, &frame_offset);
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ax_reg (ax, frame_reg);
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ax_const_l (ax, base_offset + frame_offset);
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ax_simple (ax, aop_add);
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value->kind = axs_lvalue_memory;
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loc->kind = axs_lvalue_memory;
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loc->reg = gdbarch_dwarf2_reg_to_regnum (gdbarch, frame_reg);
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loc->offset = base_offset + frame_offset;
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}
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else if (data[0] >= DW_OP_breg0
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&& data[0] <= DW_OP_breg31)
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else if (data[0] >= DW_OP_breg0 && data[0] <= DW_OP_breg31)
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{
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unsigned int reg;
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LONGEST offset;
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gdb_byte *buf_end;
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reg = data[0] - DW_OP_breg0;
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buf_end = read_sleb128 (data + 1, data + size, &offset);
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if (buf_end != data + size)
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error (_("Unexpected opcode after DW_OP_breg%u for symbol \"%s\"."),
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reg, SYMBOL_PRINT_NAME (symbol));
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data = read_sleb128 (data + 1, end, &offset);
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ax_reg (ax, reg);
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ax_const_l (ax, offset);
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ax_simple (ax, aop_add);
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value->kind = axs_lvalue_memory;
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loc->kind = axs_lvalue_memory;
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loc->reg = gdbarch_dwarf2_reg_to_regnum (gdbarch, reg);
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loc->offset = offset;
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}
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else
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error (_("Unsupported DWARF opcode 0x%x in the location of \"%s\"."),
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data[0], SYMBOL_PRINT_NAME (symbol));
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return data;
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}
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/* Given the location of a piece, issue bytecodes that will access it. */
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static void
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dwarf2_tracepoint_var_access (struct agent_expr *ax,
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struct axs_value *value,
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struct axs_var_loc *loc)
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{
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value->kind = loc->kind;
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switch (loc->kind)
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{
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case axs_lvalue_register:
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value->u.reg = loc->reg;
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break;
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case axs_lvalue_memory:
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ax_reg (ax, loc->reg);
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if (loc->offset)
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{
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ax_const_l (ax, loc->offset);
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ax_simple (ax, aop_add);
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}
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break;
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default:
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internal_error (__FILE__, __LINE__, _("Unhandled value kind in dwarf2_tracepoint_var_access"));
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}
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}
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static void
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dwarf2_tracepoint_var_ref (struct symbol *symbol, struct gdbarch *gdbarch,
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struct agent_expr *ax, struct axs_value *value,
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gdb_byte *data, int size)
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{
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gdb_byte *end = data + size;
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enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
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/* In practice, a variable is not going to be spread across
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dozens of registers or memory locations. If someone comes up
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with a real-world example, revisit this. */
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#define MAX_FRAGS 16
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struct axs_var_loc fragments[MAX_FRAGS];
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int nfrags = 0, frag;
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int length = 0;
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int piece_ok = 0;
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int bad = 0;
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int first = 1;
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if (!data || size == 0)
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{
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value->optimized_out = 1;
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return;
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}
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while (data < end)
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{
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if (!piece_ok)
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{
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if (nfrags == MAX_FRAGS)
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error (_("Too many pieces in location for \"%s\"."),
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SYMBOL_PRINT_NAME (symbol));
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fragments[nfrags].bytes = 0;
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data = dwarf2_tracepoint_var_loc (symbol, ax, &fragments[nfrags],
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gdbarch, data, end);
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nfrags++;
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piece_ok = 1;
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}
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else if (data[0] == DW_OP_piece)
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{
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ULONGEST bytes;
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data = read_uleb128 (data + 1, end, &bytes);
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/* Only deal with 4 byte fragments for now. */
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if (bytes != 4)
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error (_("DW_OP_piece %s not supported in location for \"%s\"."),
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pulongest (bytes), SYMBOL_PRINT_NAME (symbol));
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fragments[nfrags - 1].bytes = bytes;
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length += bytes;
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piece_ok = 0;
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}
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else
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{
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bad = 1;
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break;
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}
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}
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if (bad || data > end)
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error (_("Corrupted DWARF expression for \"%s\"."),
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SYMBOL_PRINT_NAME (symbol));
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/* If single expression, no pieces, convert to external format. */
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if (length == 0)
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{
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dwarf2_tracepoint_var_access (ax, value, &fragments[0]);
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return;
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}
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if (length != TYPE_LENGTH (value->type))
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error (_("Inconsistent piece information for \"%s\"."),
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SYMBOL_PRINT_NAME (symbol));
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/* Emit bytecodes to assemble the pieces into a single stack entry. */
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for ((frag = (byte_order == BFD_ENDIAN_BIG ? 0 : nfrags - 1));
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nfrags--;
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(frag += (byte_order == BFD_ENDIAN_BIG ? 1 : -1)))
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{
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if (!first)
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{
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/* shift the previous fragment up 32 bits */
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ax_const_l (ax, 32);
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ax_simple (ax, aop_lsh);
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}
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dwarf2_tracepoint_var_access (ax, value, &fragments[frag]);
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switch (value->kind)
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{
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case axs_lvalue_register:
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ax_reg (ax, value->u.reg);
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break;
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case axs_lvalue_memory:
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{
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extern int trace_kludge; /* Ugh. */
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gdb_assert (fragments[frag].bytes == 4);
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if (trace_kludge)
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ax_trace_quick (ax, 4);
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ax_simple (ax, aop_ref32);
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}
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break;
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}
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if (!first)
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{
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/* or the new fragment into the previous */
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ax_zero_ext (ax, 32);
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ax_simple (ax, aop_bit_or);
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}
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first = 0;
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}
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value->kind = axs_rvalue;
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}
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/* Return the value of SYMBOL in FRAME using the DWARF-2 expression
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evaluator to calculate the location. */
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@ -735,26 +898,104 @@ locexpr_read_needs_frame (struct symbol *symbol)
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dlbaton->per_cu);
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}
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/* Print a natural-language description of SYMBOL to STREAM. */
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static int
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locexpr_describe_location (struct symbol *symbol, struct ui_file *stream)
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{
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/* FIXME: be more extensive. */
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struct dwarf2_locexpr_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
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int addr_size = dwarf2_per_cu_addr_size (dlbaton->per_cu);
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/* Describe a single piece of a location, returning an updated
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position in the bytecode sequence. */
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if (dlbaton->size == 1
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&& dlbaton->data[0] >= DW_OP_reg0
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&& dlbaton->data[0] <= DW_OP_reg31)
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static gdb_byte *
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locexpr_describe_location_piece (struct symbol *symbol, struct ui_file *stream,
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CORE_ADDR addr, struct objfile *objfile,
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gdb_byte *data, int size, unsigned int addr_size)
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{
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struct gdbarch *gdbarch = get_objfile_arch (objfile);
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int regno;
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if (data[0] >= DW_OP_reg0 && data[0] <= DW_OP_reg31)
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{
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struct objfile *objfile = dwarf2_per_cu_objfile (dlbaton->per_cu);
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struct gdbarch *gdbarch = get_objfile_arch (objfile);
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int regno = gdbarch_dwarf2_reg_to_regnum (gdbarch,
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dlbaton->data[0] - DW_OP_reg0);
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fprintf_filtered (stream,
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"a variable in register %s",
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regno = gdbarch_dwarf2_reg_to_regnum (gdbarch, data[0] - DW_OP_reg0);
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fprintf_filtered (stream, _("a variable in $%s"),
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gdbarch_register_name (gdbarch, regno));
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data += 1;
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}
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else if (data[0] == DW_OP_regx)
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{
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ULONGEST reg;
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data = read_uleb128 (data + 1, data + size, ®);
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regno = gdbarch_dwarf2_reg_to_regnum (gdbarch, reg);
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fprintf_filtered (stream, _("a variable in $%s"),
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gdbarch_register_name (gdbarch, regno));
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||||
}
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else if (data[0] == DW_OP_fbreg)
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||||
{
|
||||
struct block *b;
|
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struct symbol *framefunc;
|
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int frame_reg = 0;
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LONGEST frame_offset;
|
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gdb_byte *base_data;
|
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size_t base_size;
|
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LONGEST base_offset = 0;
|
||||
|
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b = block_for_pc (addr);
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|
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if (!b)
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error (_("No block found for address for symbol \"%s\"."),
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SYMBOL_PRINT_NAME (symbol));
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||||
|
||||
framefunc = block_linkage_function (b);
|
||||
|
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if (!framefunc)
|
||||
error (_("No function found for block for symbol \"%s\"."),
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SYMBOL_PRINT_NAME (symbol));
|
||||
|
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dwarf_expr_frame_base_1 (framefunc, addr, &base_data, &base_size);
|
||||
|
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if (base_data[0] >= DW_OP_breg0 && base_data[0] <= DW_OP_breg31)
|
||||
{
|
||||
gdb_byte *buf_end;
|
||||
|
||||
frame_reg = base_data[0] - DW_OP_breg0;
|
||||
buf_end = read_sleb128 (base_data + 1,
|
||||
base_data + base_size, &base_offset);
|
||||
if (buf_end != base_data + base_size)
|
||||
error (_("Unexpected opcode after DW_OP_breg%u for symbol \"%s\"."),
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frame_reg, SYMBOL_PRINT_NAME (symbol));
|
||||
}
|
||||
else if (base_data[0] >= DW_OP_reg0 && base_data[0] <= DW_OP_reg31)
|
||||
{
|
||||
/* The frame base is just the register, with no offset. */
|
||||
frame_reg = base_data[0] - DW_OP_reg0;
|
||||
base_offset = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* We don't know what to do with the frame base expression,
|
||||
so we can't trace this variable; give up. */
|
||||
error (_("Cannot describe location of symbol \"%s\"; "
|
||||
"DWARF 2 encoding not handled, "
|
||||
"first opcode in base data is 0x%x."),
|
||||
SYMBOL_PRINT_NAME (symbol), base_data[0]);
|
||||
}
|
||||
|
||||
regno = gdbarch_dwarf2_reg_to_regnum (gdbarch, frame_reg);
|
||||
|
||||
data = read_sleb128 (data + 1, data + size, &frame_offset);
|
||||
|
||||
fprintf_filtered (stream, _("a variable at frame base reg $%s offset %s+%s"),
|
||||
gdbarch_register_name (gdbarch, regno),
|
||||
plongest (base_offset), plongest (frame_offset));
|
||||
}
|
||||
else if (data[0] >= DW_OP_breg0 && data[0] <= DW_OP_breg31)
|
||||
{
|
||||
LONGEST offset;
|
||||
|
||||
regno = gdbarch_dwarf2_reg_to_regnum (gdbarch, data[0] - DW_OP_breg0);
|
||||
|
||||
data = read_sleb128 (data + 1, data + size, &offset);
|
||||
|
||||
fprintf_filtered (stream,
|
||||
_("a variable at offset %s from base reg $%s"),
|
||||
plongest (offset),
|
||||
gdbarch_register_name (gdbarch, regno));
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* The location expression for a TLS variable looks like this (on a
|
||||
@ -769,37 +1010,93 @@ locexpr_describe_location (struct symbol *symbol, struct ui_file *stream)
|
||||
The operand represents the offset at which the variable is within
|
||||
the thread local storage. */
|
||||
|
||||
if (dlbaton->size > 1
|
||||
&& dlbaton->data[dlbaton->size - 1] == DW_OP_GNU_push_tls_address)
|
||||
if (dlbaton->data[0] == DW_OP_addr)
|
||||
{
|
||||
struct objfile *objfile = dwarf2_per_cu_objfile (dlbaton->per_cu);
|
||||
struct gdbarch *gdbarch = get_objfile_arch (objfile);
|
||||
CORE_ADDR offset = dwarf2_read_address (gdbarch,
|
||||
&dlbaton->data[1],
|
||||
&dlbaton->data[dlbaton->size - 1],
|
||||
addr_size);
|
||||
fprintf_filtered (stream,
|
||||
"a thread-local variable at offset %s in the "
|
||||
"thread-local storage for `%s'",
|
||||
paddress (gdbarch, offset), objfile->name);
|
||||
return 1;
|
||||
}
|
||||
|
||||
else if (size > 1
|
||||
&& data[size - 1] == DW_OP_GNU_push_tls_address
|
||||
&& data[0] == DW_OP_addr)
|
||||
{
|
||||
CORE_ADDR offset = dwarf2_read_address (gdbarch,
|
||||
data + 1,
|
||||
data + size - 1,
|
||||
addr_size);
|
||||
fprintf_filtered (stream,
|
||||
_("a thread-local variable at offset %s "
|
||||
"in the thread-local storage for `%s'"),
|
||||
paddress (gdbarch, offset), objfile->name);
|
||||
|
||||
fprintf_filtered (stream,
|
||||
"a variable with complex or multiple locations (DWARF2)");
|
||||
return 1;
|
||||
data += 1 + addr_size + 1;
|
||||
}
|
||||
else
|
||||
fprintf_filtered (stream,
|
||||
_("a variable with complex or multiple locations (DWARF2)"));
|
||||
|
||||
return data;
|
||||
}
|
||||
|
||||
/* Describe a single location, which may in turn consist of multiple
|
||||
pieces. */
|
||||
|
||||
static void
|
||||
locexpr_describe_location_1 (struct symbol *symbol, CORE_ADDR addr,
|
||||
struct ui_file *stream, gdb_byte *data, int size,
|
||||
struct objfile *objfile, unsigned int addr_size)
|
||||
{
|
||||
gdb_byte *end = data + size;
|
||||
int piece_done = 0, first_piece = 1, bad = 0;
|
||||
|
||||
/* A multi-piece description consists of multiple sequences of bytes
|
||||
each followed by DW_OP_piece + length of piece. */
|
||||
while (data < end)
|
||||
{
|
||||
if (!piece_done)
|
||||
{
|
||||
if (first_piece)
|
||||
first_piece = 0;
|
||||
else
|
||||
fprintf_filtered (stream, _(", and "));
|
||||
|
||||
data = locexpr_describe_location_piece (symbol, stream, addr, objfile,
|
||||
data, size, addr_size);
|
||||
piece_done = 1;
|
||||
}
|
||||
else if (data[0] == DW_OP_piece)
|
||||
{
|
||||
ULONGEST bytes;
|
||||
|
||||
data = read_uleb128 (data + 1, end, &bytes);
|
||||
|
||||
fprintf_filtered (stream, _(" [%s-byte piece]"), pulongest (bytes));
|
||||
|
||||
piece_done = 0;
|
||||
}
|
||||
else
|
||||
{
|
||||
bad = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (bad || data > end)
|
||||
error (_("Corrupted DWARF2 expression for \"%s\"."),
|
||||
SYMBOL_PRINT_NAME (symbol));
|
||||
}
|
||||
|
||||
/* Print a natural-language description of SYMBOL to STREAM. This
|
||||
version is for a symbol with a single location. */
|
||||
|
||||
static void
|
||||
locexpr_describe_location (struct symbol *symbol, CORE_ADDR addr,
|
||||
struct ui_file *stream)
|
||||
{
|
||||
struct dwarf2_locexpr_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
|
||||
struct objfile *objfile = dwarf2_per_cu_objfile (dlbaton->per_cu);
|
||||
unsigned int addr_size = dwarf2_per_cu_addr_size (dlbaton->per_cu);
|
||||
|
||||
locexpr_describe_location_1 (symbol, addr, stream, dlbaton->data, dlbaton->size,
|
||||
objfile, addr_size);
|
||||
}
|
||||
|
||||
/* Describe the location of SYMBOL as an agent value in VALUE, generating
|
||||
any necessary bytecode in AX.
|
||||
|
||||
NOTE drow/2003-02-26: This function is extremely minimal, because
|
||||
doing it correctly is extremely complicated and there is no
|
||||
publicly available stub with tracepoint support for me to test
|
||||
against. When there is one this function should be revisited. */
|
||||
any necessary bytecode in AX. */
|
||||
|
||||
static void
|
||||
locexpr_tracepoint_var_ref (struct symbol *symbol, struct gdbarch *gdbarch,
|
||||
@ -863,13 +1160,89 @@ loclist_read_needs_frame (struct symbol *symbol)
|
||||
return 1;
|
||||
}
|
||||
|
||||
/* Print a natural-language description of SYMBOL to STREAM. */
|
||||
static int
|
||||
loclist_describe_location (struct symbol *symbol, struct ui_file *stream)
|
||||
/* Print a natural-language description of SYMBOL to STREAM. This
|
||||
version applies when there is a list of different locations, each
|
||||
with a specified address range. */
|
||||
|
||||
static void
|
||||
loclist_describe_location (struct symbol *symbol, CORE_ADDR addr,
|
||||
struct ui_file *stream)
|
||||
{
|
||||
/* FIXME: Could print the entire list of locations. */
|
||||
fprintf_filtered (stream, "a variable with multiple locations");
|
||||
return 1;
|
||||
struct dwarf2_loclist_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
|
||||
CORE_ADDR low, high;
|
||||
gdb_byte *loc_ptr, *buf_end;
|
||||
int length, first = 1;
|
||||
struct objfile *objfile = dwarf2_per_cu_objfile (dlbaton->per_cu);
|
||||
struct gdbarch *gdbarch = get_objfile_arch (objfile);
|
||||
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
||||
unsigned int addr_size = dwarf2_per_cu_addr_size (dlbaton->per_cu);
|
||||
CORE_ADDR base_mask = ~(~(CORE_ADDR)1 << (addr_size * 8 - 1));
|
||||
/* Adjust base_address for relocatable objects. */
|
||||
CORE_ADDR base_offset = ANOFFSET (objfile->section_offsets,
|
||||
SECT_OFF_TEXT (objfile));
|
||||
CORE_ADDR base_address = dlbaton->base_address + base_offset;
|
||||
|
||||
loc_ptr = dlbaton->data;
|
||||
buf_end = dlbaton->data + dlbaton->size;
|
||||
|
||||
fprintf_filtered (stream, _("multi-location ("));
|
||||
|
||||
/* Iterate through locations until we run out. */
|
||||
while (1)
|
||||
{
|
||||
if (buf_end - loc_ptr < 2 * addr_size)
|
||||
error (_("Corrupted DWARF expression for symbol \"%s\"."),
|
||||
SYMBOL_PRINT_NAME (symbol));
|
||||
|
||||
low = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
|
||||
loc_ptr += addr_size;
|
||||
|
||||
/* A base-address-selection entry. */
|
||||
if (low == base_mask)
|
||||
{
|
||||
base_address = dwarf2_read_address (gdbarch,
|
||||
loc_ptr, buf_end, addr_size);
|
||||
fprintf_filtered (stream, _("[base address %s]"),
|
||||
paddress (gdbarch, base_address));
|
||||
loc_ptr += addr_size;
|
||||
continue;
|
||||
}
|
||||
|
||||
high = extract_unsigned_integer (loc_ptr, addr_size, byte_order);
|
||||
loc_ptr += addr_size;
|
||||
|
||||
/* An end-of-list entry. */
|
||||
if (low == 0 && high == 0)
|
||||
{
|
||||
/* Indicate the end of the list, for readability. */
|
||||
fprintf_filtered (stream, _(")"));
|
||||
return;
|
||||
}
|
||||
|
||||
/* Otherwise, a location expression entry. */
|
||||
low += base_address;
|
||||
high += base_address;
|
||||
|
||||
length = extract_unsigned_integer (loc_ptr, 2, byte_order);
|
||||
loc_ptr += 2;
|
||||
|
||||
/* Separate the different locations with a semicolon. */
|
||||
if (first)
|
||||
first = 0;
|
||||
else
|
||||
fprintf_filtered (stream, _("; "));
|
||||
|
||||
/* (It would improve readability to print only the minimum
|
||||
necessary digits of the second number of the range.) */
|
||||
fprintf_filtered (stream, _("range %s-%s, "),
|
||||
paddress (gdbarch, low), paddress (gdbarch, high));
|
||||
|
||||
/* Now describe this particular location. */
|
||||
locexpr_describe_location_1 (symbol, low, stream, loc_ptr, length,
|
||||
objfile, addr_size);
|
||||
|
||||
loc_ptr += length;
|
||||
}
|
||||
}
|
||||
|
||||
/* Describe the location of SYMBOL as an agent value in VALUE, generating
|
||||
|
||||
@ -1148,20 +1148,21 @@ sym_info (char *arg, int from_tty)
|
||||
static void
|
||||
address_info (char *exp, int from_tty)
|
||||
{
|
||||
struct block *block;
|
||||
struct gdbarch *gdbarch;
|
||||
int regno;
|
||||
struct symbol *sym;
|
||||
struct minimal_symbol *msymbol;
|
||||
long val;
|
||||
struct obj_section *section;
|
||||
CORE_ADDR load_addr;
|
||||
CORE_ADDR load_addr, context_pc = 0;
|
||||
int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero
|
||||
if exp is a field of `this'. */
|
||||
|
||||
if (exp == 0)
|
||||
error (_("Argument required."));
|
||||
|
||||
sym = lookup_symbol (exp, get_selected_block (0), VAR_DOMAIN,
|
||||
sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN,
|
||||
&is_a_field_of_this);
|
||||
if (sym == NULL)
|
||||
{
|
||||
@ -1242,7 +1243,7 @@ address_info (char *exp, int from_tty)
|
||||
Unfortunately DWARF 2 stores the frame-base (instead of the
|
||||
function) location in a function's symbol. Oops! For the
|
||||
moment enable this when/where applicable. */
|
||||
SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, gdb_stdout);
|
||||
SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc, gdb_stdout);
|
||||
break;
|
||||
|
||||
case LOC_REGISTER:
|
||||
|
||||
@ -516,8 +516,9 @@ struct symbol_computed_ops
|
||||
int (*read_needs_frame) (struct symbol * symbol);
|
||||
|
||||
/* Write to STREAM a natural-language description of the location of
|
||||
SYMBOL. */
|
||||
int (*describe_location) (struct symbol * symbol, struct ui_file * stream);
|
||||
SYMBOL, in the context of ADDR. */
|
||||
void (*describe_location) (struct symbol * symbol, CORE_ADDR addr,
|
||||
struct ui_file * stream);
|
||||
|
||||
/* Tracepoint support. Append bytecodes to the tracepoint agent
|
||||
expression AX that push the address of the object SYMBOL. Set
|
||||
|
||||
@ -2372,7 +2372,9 @@ scope_info (char *args, int from_tty)
|
||||
printf_filtered ("optimized out.\n");
|
||||
continue;
|
||||
case LOC_COMPUTED:
|
||||
SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, gdb_stdout);
|
||||
SYMBOL_COMPUTED_OPS (sym)->describe_location (sym,
|
||||
BLOCK_START (block),
|
||||
gdb_stdout);
|
||||
break;
|
||||
}
|
||||
if (SYMBOL_TYPE (sym))
|
||||
|
||||
Loading…
Reference in New Issue
Block a user