From: Andrew Burgess Date: Thu, 4 Jul 2013 09:49:43 +0000 (+0000) Subject: http://sourceware.org/ml/gdb-patches/2013-07/msg00056.html X-Git-Tag: cygwin-1_7_21-release~34 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a58e2656df4e2a614bc276159ef9b20368cdb8ca;p=external%2Fbinutils.git sourceware.org/ml/gdb-patches/2013-07/msg00056.html * valops.c: Don't include "user-regs.h". (value_fetch_lazy): Moved to value.c. * value.c: Include "user-regs.h". (value_fetch_lazy): Moved from valops.c. --- diff --git a/gdb/ChangeLog b/gdb/ChangeLog index c7b8c1f..f9a2b30 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,10 @@ +2013-07-04 Andrew Burgess + + * valops.c: Don't include "user-regs.h". + (value_fetch_lazy): Moved to value.c. + * value.c: Include "user-regs.h". + (value_fetch_lazy): Moved from valops.c. + 2013-07-04 Yao Qi Revert: diff --git a/gdb/valops.c b/gdb/valops.c index 93c09d8..4161c2c 100644 --- a/gdb/valops.c +++ b/gdb/valops.c @@ -35,7 +35,6 @@ #include "dictionary.h" #include "cp-support.h" #include "dfp.h" -#include "user-regs.h" #include "tracepoint.h" #include #include "gdb_string.h" @@ -947,167 +946,6 @@ value_at_lazy (struct type *type, CORE_ADDR addr) return get_value_at (type, addr, 1); } -/* Called only from the value_contents and value_contents_all() - macros, if the current data for a variable needs to be loaded into - value_contents(VAL). Fetches the data from the user's process, and - clears the lazy flag to indicate that the data in the buffer is - valid. - - If the value is zero-length, we avoid calling read_memory, which - would abort. We mark the value as fetched anyway -- all 0 bytes of - it. - - This function returns a value because it is used in the - value_contents macro as part of an expression, where a void would - not work. The value is ignored. */ - -int -value_fetch_lazy (struct value *val) -{ - gdb_assert (value_lazy (val)); - allocate_value_contents (val); - if (value_bitsize (val)) - { - /* To read a lazy bitfield, read the entire enclosing value. This - prevents reading the same block of (possibly volatile) memory once - per bitfield. It would be even better to read only the containing - word, but we have no way to record that just specific bits of a - value have been fetched. */ - struct type *type = check_typedef (value_type (val)); - enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); - struct value *parent = value_parent (val); - LONGEST offset = value_offset (val); - LONGEST num; - - if (!value_bits_valid (val, - TARGET_CHAR_BIT * offset + value_bitpos (val), - value_bitsize (val))) - error (_("value has been optimized out")); - - if (!unpack_value_bits_as_long (value_type (val), - value_contents_for_printing (parent), - offset, - value_bitpos (val), - value_bitsize (val), parent, &num)) - mark_value_bytes_unavailable (val, - value_embedded_offset (val), - TYPE_LENGTH (type)); - else - store_signed_integer (value_contents_raw (val), TYPE_LENGTH (type), - byte_order, num); - } - else if (VALUE_LVAL (val) == lval_memory) - { - CORE_ADDR addr = value_address (val); - struct type *type = check_typedef (value_enclosing_type (val)); - - if (TYPE_LENGTH (type)) - read_value_memory (val, 0, value_stack (val), - addr, value_contents_all_raw (val), - TYPE_LENGTH (type)); - } - else if (VALUE_LVAL (val) == lval_register) - { - struct frame_info *frame; - int regnum; - struct type *type = check_typedef (value_type (val)); - struct value *new_val = val, *mark = value_mark (); - - /* Offsets are not supported here; lazy register values must - refer to the entire register. */ - gdb_assert (value_offset (val) == 0); - - while (VALUE_LVAL (new_val) == lval_register && value_lazy (new_val)) - { - frame = frame_find_by_id (VALUE_FRAME_ID (new_val)); - regnum = VALUE_REGNUM (new_val); - - gdb_assert (frame != NULL); - - /* Convertible register routines are used for multi-register - values and for interpretation in different types - (e.g. float or int from a double register). Lazy - register values should have the register's natural type, - so they do not apply. */ - gdb_assert (!gdbarch_convert_register_p (get_frame_arch (frame), - regnum, type)); - - new_val = get_frame_register_value (frame, regnum); - } - - /* If it's still lazy (for instance, a saved register on the - stack), fetch it. */ - if (value_lazy (new_val)) - value_fetch_lazy (new_val); - - /* If the register was not saved, mark it optimized out. */ - if (value_optimized_out (new_val)) - set_value_optimized_out (val, 1); - else - { - set_value_lazy (val, 0); - value_contents_copy (val, value_embedded_offset (val), - new_val, value_embedded_offset (new_val), - TYPE_LENGTH (type)); - } - - if (frame_debug) - { - struct gdbarch *gdbarch; - frame = frame_find_by_id (VALUE_FRAME_ID (val)); - regnum = VALUE_REGNUM (val); - gdbarch = get_frame_arch (frame); - - fprintf_unfiltered (gdb_stdlog, - "{ value_fetch_lazy " - "(frame=%d,regnum=%d(%s),...) ", - frame_relative_level (frame), regnum, - user_reg_map_regnum_to_name (gdbarch, regnum)); - - fprintf_unfiltered (gdb_stdlog, "->"); - if (value_optimized_out (new_val)) - fprintf_unfiltered (gdb_stdlog, " optimized out"); - else - { - int i; - const gdb_byte *buf = value_contents (new_val); - - if (VALUE_LVAL (new_val) == lval_register) - fprintf_unfiltered (gdb_stdlog, " register=%d", - VALUE_REGNUM (new_val)); - else if (VALUE_LVAL (new_val) == lval_memory) - fprintf_unfiltered (gdb_stdlog, " address=%s", - paddress (gdbarch, - value_address (new_val))); - else - fprintf_unfiltered (gdb_stdlog, " computed"); - - fprintf_unfiltered (gdb_stdlog, " bytes="); - fprintf_unfiltered (gdb_stdlog, "["); - for (i = 0; i < register_size (gdbarch, regnum); i++) - fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); - fprintf_unfiltered (gdb_stdlog, "]"); - } - - fprintf_unfiltered (gdb_stdlog, " }\n"); - } - - /* Dispose of the intermediate values. This prevents - watchpoints from trying to watch the saved frame pointer. */ - value_free_to_mark (mark); - } - else if (VALUE_LVAL (val) == lval_computed - && value_computed_funcs (val)->read != NULL) - value_computed_funcs (val)->read (val); - else if (value_optimized_out (val)) - /* Keep it optimized out. */; - else - internal_error (__FILE__, __LINE__, _("Unexpected lazy value type.")); - - set_value_lazy (val, 0); - return 0; -} - void read_value_memory (struct value *val, int embedded_offset, int stack, CORE_ADDR memaddr, diff --git a/gdb/value.c b/gdb/value.c index fae8b98..8547590 100644 --- a/gdb/value.c +++ b/gdb/value.c @@ -42,6 +42,7 @@ #include #include "tracepoint.h" #include "cp-abi.h" +#include "user-regs.h" /* Prototypes for exported functions. */ @@ -3373,6 +3374,167 @@ value_initialized (struct value *val) return val->initialized; } +/* Called only from the value_contents and value_contents_all() + macros, if the current data for a variable needs to be loaded into + value_contents(VAL). Fetches the data from the user's process, and + clears the lazy flag to indicate that the data in the buffer is + valid. + + If the value is zero-length, we avoid calling read_memory, which + would abort. We mark the value as fetched anyway -- all 0 bytes of + it. + + This function returns a value because it is used in the + value_contents macro as part of an expression, where a void would + not work. The value is ignored. */ + +int +value_fetch_lazy (struct value *val) +{ + gdb_assert (value_lazy (val)); + allocate_value_contents (val); + if (value_bitsize (val)) + { + /* To read a lazy bitfield, read the entire enclosing value. This + prevents reading the same block of (possibly volatile) memory once + per bitfield. It would be even better to read only the containing + word, but we have no way to record that just specific bits of a + value have been fetched. */ + struct type *type = check_typedef (value_type (val)); + enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type)); + struct value *parent = value_parent (val); + LONGEST offset = value_offset (val); + LONGEST num; + + if (!value_bits_valid (val, + TARGET_CHAR_BIT * offset + value_bitpos (val), + value_bitsize (val))) + error (_("value has been optimized out")); + + if (!unpack_value_bits_as_long (value_type (val), + value_contents_for_printing (parent), + offset, + value_bitpos (val), + value_bitsize (val), parent, &num)) + mark_value_bytes_unavailable (val, + value_embedded_offset (val), + TYPE_LENGTH (type)); + else + store_signed_integer (value_contents_raw (val), TYPE_LENGTH (type), + byte_order, num); + } + else if (VALUE_LVAL (val) == lval_memory) + { + CORE_ADDR addr = value_address (val); + struct type *type = check_typedef (value_enclosing_type (val)); + + if (TYPE_LENGTH (type)) + read_value_memory (val, 0, value_stack (val), + addr, value_contents_all_raw (val), + TYPE_LENGTH (type)); + } + else if (VALUE_LVAL (val) == lval_register) + { + struct frame_info *frame; + int regnum; + struct type *type = check_typedef (value_type (val)); + struct value *new_val = val, *mark = value_mark (); + + /* Offsets are not supported here; lazy register values must + refer to the entire register. */ + gdb_assert (value_offset (val) == 0); + + while (VALUE_LVAL (new_val) == lval_register && value_lazy (new_val)) + { + frame = frame_find_by_id (VALUE_FRAME_ID (new_val)); + regnum = VALUE_REGNUM (new_val); + + gdb_assert (frame != NULL); + + /* Convertible register routines are used for multi-register + values and for interpretation in different types + (e.g. float or int from a double register). Lazy + register values should have the register's natural type, + so they do not apply. */ + gdb_assert (!gdbarch_convert_register_p (get_frame_arch (frame), + regnum, type)); + + new_val = get_frame_register_value (frame, regnum); + } + + /* If it's still lazy (for instance, a saved register on the + stack), fetch it. */ + if (value_lazy (new_val)) + value_fetch_lazy (new_val); + + /* If the register was not saved, mark it optimized out. */ + if (value_optimized_out (new_val)) + set_value_optimized_out (val, 1); + else + { + set_value_lazy (val, 0); + value_contents_copy (val, value_embedded_offset (val), + new_val, value_embedded_offset (new_val), + TYPE_LENGTH (type)); + } + + if (frame_debug) + { + struct gdbarch *gdbarch; + frame = frame_find_by_id (VALUE_FRAME_ID (val)); + regnum = VALUE_REGNUM (val); + gdbarch = get_frame_arch (frame); + + fprintf_unfiltered (gdb_stdlog, + "{ value_fetch_lazy " + "(frame=%d,regnum=%d(%s),...) ", + frame_relative_level (frame), regnum, + user_reg_map_regnum_to_name (gdbarch, regnum)); + + fprintf_unfiltered (gdb_stdlog, "->"); + if (value_optimized_out (new_val)) + fprintf_unfiltered (gdb_stdlog, " optimized out"); + else + { + int i; + const gdb_byte *buf = value_contents (new_val); + + if (VALUE_LVAL (new_val) == lval_register) + fprintf_unfiltered (gdb_stdlog, " register=%d", + VALUE_REGNUM (new_val)); + else if (VALUE_LVAL (new_val) == lval_memory) + fprintf_unfiltered (gdb_stdlog, " address=%s", + paddress (gdbarch, + value_address (new_val))); + else + fprintf_unfiltered (gdb_stdlog, " computed"); + + fprintf_unfiltered (gdb_stdlog, " bytes="); + fprintf_unfiltered (gdb_stdlog, "["); + for (i = 0; i < register_size (gdbarch, regnum); i++) + fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]); + fprintf_unfiltered (gdb_stdlog, "]"); + } + + fprintf_unfiltered (gdb_stdlog, " }\n"); + } + + /* Dispose of the intermediate values. This prevents + watchpoints from trying to watch the saved frame pointer. */ + value_free_to_mark (mark); + } + else if (VALUE_LVAL (val) == lval_computed + && value_computed_funcs (val)->read != NULL) + value_computed_funcs (val)->read (val); + else if (value_optimized_out (val)) + /* Keep it optimized out. */; + else + internal_error (__FILE__, __LINE__, _("Unexpected lazy value type.")); + + set_value_lazy (val, 0); + return 0; +} + void _initialize_values (void) {