/* Find a variable's value in memory, for GDB, the GNU debugger.
- Copyright (C) 1986-2016 Free Software Foundation, Inc.
+ Copyright (C) 1986-2021 Free Software Foundation, Inc.
This file is part of GDB.
#include "gdbcore.h"
#include "inferior.h"
#include "target.h"
-#include "floatformat.h"
#include "symfile.h" /* for overlay functions */
#include "regcache.h"
#include "user-regs.h"
#include "block.h"
#include "objfiles.h"
#include "language.h"
-#include "dwarf2loc.h"
+#include "dwarf2/loc.h"
+#include "gdbsupport/selftest.h"
/* Basic byte-swapping routines. All 'extract' functions return a
host-format integer from a target-format integer at ADDR which is
you lose
#endif
-LONGEST
-extract_signed_integer (const gdb_byte *addr, int len,
- enum bfd_endian byte_order)
+template<typename T, typename>
+T
+extract_integer (const gdb_byte *addr, int len, enum bfd_endian byte_order)
{
- LONGEST retval;
+ typename std::make_unsigned<T>::type retval = 0;
const unsigned char *p;
const unsigned char *startaddr = addr;
const unsigned char *endaddr = startaddr + len;
- if (len > (int) sizeof (LONGEST))
+ if (len > (int) sizeof (T))
error (_("\
That operation is not available on integers of more than %d bytes."),
- (int) sizeof (LONGEST));
+ (int) sizeof (T));
/* Start at the most significant end of the integer, and work towards
the least significant. */
if (byte_order == BFD_ENDIAN_BIG)
{
p = startaddr;
- /* Do the sign extension once at the start. */
- retval = ((LONGEST) * p ^ 0x80) - 0x80;
- for (++p; p < endaddr; ++p)
+ if (std::is_signed<T>::value)
+ {
+ /* Do the sign extension once at the start. */
+ retval = ((LONGEST) * p ^ 0x80) - 0x80;
+ ++p;
+ }
+ for (; p < endaddr; ++p)
retval = (retval << 8) | *p;
}
else
{
p = endaddr - 1;
- /* Do the sign extension once at the start. */
- retval = ((LONGEST) * p ^ 0x80) - 0x80;
- for (--p; p >= startaddr; --p)
+ if (std::is_signed<T>::value)
+ {
+ /* Do the sign extension once at the start. */
+ retval = ((LONGEST) * p ^ 0x80) - 0x80;
+ --p;
+ }
+ for (; p >= startaddr; --p)
retval = (retval << 8) | *p;
}
return retval;
}
-ULONGEST
-extract_unsigned_integer (const gdb_byte *addr, int len,
- enum bfd_endian byte_order)
-{
- ULONGEST retval;
- const unsigned char *p;
- const unsigned char *startaddr = addr;
- const unsigned char *endaddr = startaddr + len;
-
- if (len > (int) sizeof (ULONGEST))
- error (_("\
-That operation is not available on integers of more than %d bytes."),
- (int) sizeof (ULONGEST));
-
- /* Start at the most significant end of the integer, and work towards
- the least significant. */
- retval = 0;
- if (byte_order == BFD_ENDIAN_BIG)
- {
- for (p = startaddr; p < endaddr; ++p)
- retval = (retval << 8) | *p;
- }
- else
- {
- for (p = endaddr - 1; p >= startaddr; --p)
- retval = (retval << 8) | *p;
- }
- return retval;
-}
+/* Explicit instantiations. */
+template LONGEST extract_integer<LONGEST> (const gdb_byte *addr, int len,
+ enum bfd_endian byte_order);
+template ULONGEST extract_integer<ULONGEST> (const gdb_byte *addr, int len,
+ enum bfd_endian byte_order);
/* Sometimes a long long unsigned integer can be extracted as a
LONGEST value. This is done so that we can print these values
CORE_ADDR
extract_typed_address (const gdb_byte *buf, struct type *type)
{
- if (TYPE_CODE (type) != TYPE_CODE_PTR
- && TYPE_CODE (type) != TYPE_CODE_REF)
+ if (type->code () != TYPE_CODE_PTR && !TYPE_IS_REFERENCE (type))
internal_error (__FILE__, __LINE__,
_("extract_typed_address: "
"type is not a pointer or reference"));
- return gdbarch_pointer_to_address (get_type_arch (type), type, buf);
+ return gdbarch_pointer_to_address (type->arch (), type, buf);
}
/* All 'store' functions accept a host-format integer and store a
target-format integer at ADDR which is LEN bytes long. */
-
+template<typename T, typename>
void
-store_signed_integer (gdb_byte *addr, int len,
- enum bfd_endian byte_order, LONGEST val)
+store_integer (gdb_byte *addr, int len, enum bfd_endian byte_order,
+ T val)
{
gdb_byte *p;
gdb_byte *startaddr = addr;
}
}
-void
-store_unsigned_integer (gdb_byte *addr, int len,
- enum bfd_endian byte_order, ULONGEST val)
-{
- unsigned char *p;
- unsigned char *startaddr = (unsigned char *) addr;
- unsigned char *endaddr = startaddr + len;
+/* Explicit instantiations. */
+template void store_integer (gdb_byte *addr, int len,
+ enum bfd_endian byte_order,
+ LONGEST val);
- /* Start at the least significant end of the integer, and work towards
- the most significant. */
- if (byte_order == BFD_ENDIAN_BIG)
- {
- for (p = endaddr - 1; p >= startaddr; --p)
- {
- *p = val & 0xff;
- val >>= 8;
- }
- }
- else
- {
- for (p = startaddr; p < endaddr; ++p)
- {
- *p = val & 0xff;
- val >>= 8;
- }
- }
-}
+template void store_integer (gdb_byte *addr, int len,
+ enum bfd_endian byte_order,
+ ULONGEST val);
/* Store the address ADDR as a pointer of type TYPE at BUF, in target
form. */
void
store_typed_address (gdb_byte *buf, struct type *type, CORE_ADDR addr)
{
- if (TYPE_CODE (type) != TYPE_CODE_PTR
- && TYPE_CODE (type) != TYPE_CODE_REF)
+ if (type->code () != TYPE_CODE_PTR && !TYPE_IS_REFERENCE (type))
internal_error (__FILE__, __LINE__,
_("store_typed_address: "
"type is not a pointer or reference"));
- gdbarch_address_to_pointer (get_type_arch (type), type, buf, addr);
+ gdbarch_address_to_pointer (type->arch (), type, buf, addr);
}
+/* Copy a value from SOURCE of size SOURCE_SIZE bytes to DEST of size DEST_SIZE
+ bytes. If SOURCE_SIZE is greater than DEST_SIZE, then truncate the most
+ significant bytes. If SOURCE_SIZE is less than DEST_SIZE then either sign
+ or zero extended according to IS_SIGNED. Values are stored in memory with
+ endianness BYTE_ORDER. */
+
+void
+copy_integer_to_size (gdb_byte *dest, int dest_size, const gdb_byte *source,
+ int source_size, bool is_signed,
+ enum bfd_endian byte_order)
+{
+ signed int size_diff = dest_size - source_size;
+
+ /* Copy across everything from SOURCE that can fit into DEST. */
+
+ if (byte_order == BFD_ENDIAN_BIG && size_diff > 0)
+ memcpy (dest + size_diff, source, source_size);
+ else if (byte_order == BFD_ENDIAN_BIG && size_diff < 0)
+ memcpy (dest, source - size_diff, dest_size);
+ else
+ memcpy (dest, source, std::min (source_size, dest_size));
+
+ /* Fill the remaining space in DEST by either zero extending or sign
+ extending. */
+ if (size_diff > 0)
+ {
+ gdb_byte extension = 0;
+ if (is_signed
+ && ((byte_order != BFD_ENDIAN_BIG && source[source_size - 1] & 0x80)
+ || (byte_order == BFD_ENDIAN_BIG && source[0] & 0x80)))
+ extension = 0xff;
+
+ /* Extend into MSBs of SOURCE. */
+ if (byte_order == BFD_ENDIAN_BIG)
+ memset (dest, extension, size_diff);
+ else
+ memset (dest + source_size, extension, size_diff);
+ }
+}
/* Return a `value' with the contents of (virtual or cooked) register
REGNUM as found in the specified FRAME. The register's type is
- determined by register_type(). */
+ determined by register_type (). */
struct value *
value_of_register (int regnum, struct frame_info *frame)
/* User registers lie completely outside of the range of normal
registers. Catch them early so that the target never sees them. */
- if (regnum >= gdbarch_num_regs (gdbarch)
- + gdbarch_num_pseudo_regs (gdbarch))
+ if (regnum >= gdbarch_num_cooked_regs (gdbarch))
return value_of_user_reg (regnum, frame);
reg_val = value_of_register_lazy (frame, regnum);
/* Return a `value' with the contents of (virtual or cooked) register
REGNUM as found in the specified FRAME. The register's type is
- determined by register_type(). The value is not fetched. */
+ determined by register_type (). The value is not fetched. */
struct value *
value_of_register_lazy (struct frame_info *frame, int regnum)
{
struct gdbarch *gdbarch = get_frame_arch (frame);
struct value *reg_val;
+ struct frame_info *next_frame;
- gdb_assert (regnum < (gdbarch_num_regs (gdbarch)
- + gdbarch_num_pseudo_regs (gdbarch)));
+ gdb_assert (regnum < gdbarch_num_cooked_regs (gdbarch));
- /* We should have a valid (i.e. non-sentinel) frame. */
- gdb_assert (frame_id_p (get_frame_id (frame)));
+ gdb_assert (frame != NULL);
+
+ next_frame = get_next_frame_sentinel_okay (frame);
+
+ /* In some cases NEXT_FRAME may not have a valid frame-id yet. This can
+ happen if we end up trying to unwind a register as part of the frame
+ sniffer. The only time that we get here without a valid frame-id is
+ if NEXT_FRAME is an inline frame. If this is the case then we can
+ avoid getting into trouble here by skipping past the inline frames. */
+ while (get_frame_type (next_frame) == INLINE_FRAME)
+ next_frame = get_next_frame_sentinel_okay (next_frame);
+
+ /* We should have a valid next frame. */
+ gdb_assert (frame_id_p (get_frame_id (next_frame)));
reg_val = allocate_value_lazy (register_type (gdbarch, regnum));
VALUE_LVAL (reg_val) = lval_register;
VALUE_REGNUM (reg_val) = regnum;
- VALUE_FRAME_ID (reg_val) = get_frame_id (frame);
+ VALUE_NEXT_FRAME_ID (reg_val) = get_frame_id (next_frame);
+
return reg_val;
}
unsigned_pointer_to_address (struct gdbarch *gdbarch,
struct type *type, const gdb_byte *buf)
{
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ enum bfd_endian byte_order = type_byte_order (type);
return extract_unsigned_integer (buf, TYPE_LENGTH (type), byte_order);
}
signed_pointer_to_address (struct gdbarch *gdbarch,
struct type *type, const gdb_byte *buf)
{
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ enum bfd_endian byte_order = type_byte_order (type);
return extract_signed_integer (buf, TYPE_LENGTH (type), byte_order);
}
unsigned_address_to_pointer (struct gdbarch *gdbarch, struct type *type,
gdb_byte *buf, CORE_ADDR addr)
{
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ enum bfd_endian byte_order = type_byte_order (type);
store_unsigned_integer (buf, TYPE_LENGTH (type), byte_order, addr);
}
address_to_signed_pointer (struct gdbarch *gdbarch, struct type *type,
gdb_byte *buf, CORE_ADDR addr)
{
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
+ enum bfd_endian byte_order = type_byte_order (type);
store_signed_integer (buf, TYPE_LENGTH (type), byte_order, addr);
}
\f
-/* Will calling read_var_value or locate_var_value on SYM end
- up caring what frame it is being evaluated relative to? SYM must
- be non-NULL. */
-int
-symbol_read_needs_frame (struct symbol *sym)
+/* See value.h. */
+
+enum symbol_needs_kind
+symbol_read_needs (struct symbol *sym)
{
if (SYMBOL_COMPUTED_OPS (sym) != NULL)
- return SYMBOL_COMPUTED_OPS (sym)->read_needs_frame (sym);
+ return SYMBOL_COMPUTED_OPS (sym)->get_symbol_read_needs (sym);
switch (SYMBOL_CLASS (sym))
{
/* All cases listed explicitly so that gcc -Wall will detect it if
- we failed to consider one. */
+ we failed to consider one. */
case LOC_COMPUTED:
gdb_assert_not_reached (_("LOC_COMPUTED variable missing a method"));
case LOC_REF_ARG:
case LOC_REGPARM_ADDR:
case LOC_LOCAL:
- return 1;
+ return SYMBOL_NEEDS_FRAME;
case LOC_UNDEF:
case LOC_CONST:
case LOC_LABEL:
/* Getting the address of a label can be done independently of the block,
- even if some *uses* of that address wouldn't work so well without
- the right frame. */
+ even if some *uses* of that address wouldn't work so well without
+ the right frame. */
case LOC_BLOCK:
case LOC_CONST_BYTES:
case LOC_UNRESOLVED:
case LOC_OPTIMIZED_OUT:
- return 0;
+ return SYMBOL_NEEDS_NONE;
}
- return 1;
+ return SYMBOL_NEEDS_FRAME;
+}
+
+/* See value.h. */
+
+int
+symbol_read_needs_frame (struct symbol *sym)
+{
+ return symbol_read_needs (sym) == SYMBOL_NEEDS_FRAME;
}
/* Private data to be used with minsym_lookup_iterator_cb. */
QUIT;
/* If we don't know how to compute FRAME's base address, don't give up:
- maybe the frame we are looking for is upper in the stace frame. */
+ maybe the frame we are looking for is upper in the stack frame. */
if (framefunc != NULL
&& SYMBOL_BLOCK_OPS (framefunc) != NULL
&& SYMBOL_BLOCK_OPS (framefunc)->get_frame_base != NULL
{
if (BLOCK_FUNCTION (var_block)
&& !block_inlined_p (var_block)
- && SYMBOL_PRINT_NAME (BLOCK_FUNCTION (var_block)))
+ && BLOCK_FUNCTION (var_block)->print_name ())
error (_("No frame is currently executing in block %s."),
- SYMBOL_PRINT_NAME (BLOCK_FUNCTION (var_block)));
+ BLOCK_FUNCTION (var_block)->print_name ());
else
error (_("No frame is currently executing in specified"
" block"));
return frame;
}
-/* A default implementation for the "la_read_var_value" hook in
- the language vector which should work in most situations. */
+/* See language.h. */
struct value *
-default_read_var_value (struct symbol *var, const struct block *var_block,
- struct frame_info *frame)
+language_defn::read_var_value (struct symbol *var,
+ const struct block *var_block,
+ struct frame_info *frame) const
{
struct value *v;
struct type *type = SYMBOL_TYPE (var);
CORE_ADDR addr;
+ enum symbol_needs_kind sym_need;
/* Call check_typedef on our type to make sure that, if TYPE is
a TYPE_CODE_TYPEDEF, its length is set to the length of the target type
set the returned value type description correctly. */
check_typedef (type);
- if (symbol_read_needs_frame (var))
+ sym_need = symbol_read_needs (var);
+ if (sym_need == SYMBOL_NEEDS_FRAME)
gdb_assert (frame != NULL);
+ else if (sym_need == SYMBOL_NEEDS_REGISTERS && !target_has_registers ())
+ error (_("Cannot read `%s' without registers"), var->print_name ());
if (frame != NULL)
frame = get_hosting_frame (var, var_block, frame);
if (is_dynamic_type (type))
{
/* Value is a constant byte-sequence and needs no memory access. */
- type = resolve_dynamic_type (type, NULL, /* Unused address. */ 0);
+ type = resolve_dynamic_type (type, {}, /* Unused address. */ 0);
}
/* Put the constant back in target format. */
v = allocate_value (type);
store_signed_integer (value_contents_raw (v), TYPE_LENGTH (type),
- gdbarch_byte_order (get_type_arch (type)),
+ type_byte_order (type),
(LONGEST) SYMBOL_VALUE (var));
VALUE_LVAL (v) = not_lval;
return v;
v = allocate_value (type);
if (overlay_debugging)
{
- CORE_ADDR addr
- = symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (var),
- SYMBOL_OBJ_SECTION (symbol_objfile (var),
- var));
-
+ struct objfile *var_objfile = symbol_objfile (var);
+ addr = symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (var),
+ var->obj_section (var_objfile));
store_typed_address (value_contents_raw (v), type, addr);
}
else
if (is_dynamic_type (type))
{
/* Value is a constant byte-sequence and needs no memory access. */
- type = resolve_dynamic_type (type, NULL, /* Unused address. */ 0);
+ type = resolve_dynamic_type (type, {}, /* Unused address. */ 0);
}
v = allocate_value (type);
memcpy (value_contents_raw (v), SYMBOL_VALUE_BYTES (var),
case LOC_STATIC:
if (overlay_debugging)
- addr = symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (var),
- SYMBOL_OBJ_SECTION (symbol_objfile (var),
- var));
+ addr
+ = symbol_overlayed_address (SYMBOL_VALUE_ADDRESS (var),
+ var->obj_section (symbol_objfile (var)));
else
addr = SYMBOL_VALUE_ADDRESS (var);
break;
addr = get_frame_args_address (frame);
if (!addr)
error (_("Unknown argument list address for `%s'."),
- SYMBOL_PRINT_NAME (var));
+ var->print_name ());
addr += SYMBOL_VALUE (var);
break;
argref = get_frame_args_address (frame);
if (!argref)
error (_("Unknown argument list address for `%s'."),
- SYMBOL_PRINT_NAME (var));
+ var->print_name ());
argref += SYMBOL_VALUE (var);
ref = value_at (lookup_pointer_type (type), argref);
addr = value_as_address (ref);
case LOC_TYPEDEF:
error (_("Cannot look up value of a typedef `%s'."),
- SYMBOL_PRINT_NAME (var));
+ var->print_name ());
break;
case LOC_BLOCK:
if (overlay_debugging)
addr = symbol_overlayed_address
- (BLOCK_START (SYMBOL_BLOCK_VALUE (var)),
- SYMBOL_OBJ_SECTION (symbol_objfile (var), var));
+ (BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (var)),
+ var->obj_section (symbol_objfile (var)));
else
- addr = BLOCK_START (SYMBOL_BLOCK_VALUE (var));
+ addr = BLOCK_ENTRY_PC (SYMBOL_BLOCK_VALUE (var));
break;
case LOC_REGISTER:
if (regval == NULL)
error (_("Value of register variable not available for `%s'."),
- SYMBOL_PRINT_NAME (var));
+ var->print_name ());
addr = value_as_address (regval);
}
if (regval == NULL)
error (_("Value of register variable not available for `%s'."),
- SYMBOL_PRINT_NAME (var));
+ var->print_name ());
return regval;
}
}
struct obj_section *obj_section;
memset (&lookup_data, 0, sizeof (lookup_data));
- lookup_data.name = SYMBOL_LINKAGE_NAME (var);
+ lookup_data.name = var->linkage_name ();
gdbarch_iterate_over_objfiles_in_search_order
(symbol_arch (var),
can't be NULL. */
gdb_assert (flavour_name != NULL);
error (_("Missing %s symbol \"%s\"."),
- flavour_name, SYMBOL_LINKAGE_NAME (var));
+ flavour_name, var->linkage_name ());
}
- obj_section = MSYMBOL_OBJ_SECTION (lookup_data.result.objfile, msym);
+ obj_section = msym->obj_section (lookup_data.result.objfile);
/* Relocate address, unless there is no section or the variable is
a TLS variable. */
if (obj_section == NULL
break;
case LOC_OPTIMIZED_OUT:
+ if (is_dynamic_type (type))
+ type = resolve_dynamic_type (type, {}, /* Unused address. */ 0);
return allocate_optimized_out_value (type);
default:
error (_("Cannot look up value of a botched symbol `%s'."),
- SYMBOL_PRINT_NAME (var));
+ var->print_name ());
break;
}
return v;
}
-/* Calls VAR's language la_read_var_value hook with the given arguments. */
+/* Calls VAR's language read_var_value hook with the given arguments. */
struct value *
read_var_value (struct symbol *var, const struct block *var_block,
struct frame_info *frame)
{
- const struct language_defn *lang = language_def (SYMBOL_LANGUAGE (var));
+ const struct language_defn *lang = language_def (var->language ());
gdb_assert (lang != NULL);
- gdb_assert (lang->la_read_var_value != NULL);
- return lang->la_read_var_value (var, var_block, frame);
+ return lang->read_var_value (var, var_block, frame);
}
/* Install default attributes for register values. */
struct value *
default_value_from_register (struct gdbarch *gdbarch, struct type *type,
- int regnum, struct frame_id frame_id)
+ int regnum, struct frame_id frame_id)
{
int len = TYPE_LENGTH (type);
struct value *value = allocate_value (type);
+ struct frame_info *frame;
VALUE_LVAL (value) = lval_register;
- VALUE_FRAME_ID (value) = frame_id;
+ frame = frame_find_by_id (frame_id);
+
+ if (frame == NULL)
+ frame_id = null_frame_id;
+ else
+ frame_id = get_frame_id (get_next_frame_sentinel_okay (frame));
+
+ VALUE_NEXT_FRAME_ID (value) = frame_id;
VALUE_REGNUM (value) = regnum;
/* Any structure stored in more than one register will always be
an integral number of registers. Otherwise, you need to do
some fiddling with the last register copied here for little
endian machines. */
- if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG
+ if (type_byte_order (type) == BFD_ENDIAN_BIG
&& len < register_size (gdbarch, regnum))
/* Big-endian, and we want less than full size. */
set_value_offset (value, register_size (gdbarch, regnum) - len);
int reg_len = type_length_units (value_type (regval)) - reg_offset;
/* If the register length is larger than the number of bytes
- remaining to copy, then only copy the appropriate bytes. */
+ remaining to copy, then only copy the appropriate bytes. */
if (reg_len > len)
reg_len = len;
int optim, unavail, ok;
/* The ISA/ABI need to something weird when obtaining the
- specified value from this register. It might need to
- re-order non-adjacent, starting with REGNUM (see MIPS and
- i386). It might need to convert the [float] register into
- the corresponding [integer] type (see Alpha). The assumption
- is that gdbarch_register_to_value populates the entire value
- including the location. */
+ specified value from this register. It might need to
+ re-order non-adjacent, starting with REGNUM (see MIPS and
+ i386). It might need to convert the [float] register into
+ the corresponding [integer] type (see Alpha). The assumption
+ is that gdbarch_register_to_value populates the entire value
+ including the location. */
v = allocate_value (type);
VALUE_LVAL (v) = lval_register;
- VALUE_FRAME_ID (v) = get_frame_id (frame);
+ VALUE_NEXT_FRAME_ID (v) = get_frame_id (get_next_frame_sentinel_okay (frame));
VALUE_REGNUM (v) = regnum;
ok = gdbarch_register_to_value (gdbarch, frame, regnum, type1,
value_contents_raw (v), &optim,
struct type *type = builtin_type (gdbarch)->builtin_data_ptr;
struct value *value;
CORE_ADDR result;
- int regnum_max_excl = (gdbarch_num_regs (gdbarch)
- + gdbarch_num_pseudo_regs (gdbarch));
+ int regnum_max_excl = gdbarch_num_cooked_regs (gdbarch);
if (regnum < 0 || regnum >= regnum_max_excl)
error (_("Invalid register #%d, expecting 0 <= # < %d"), regnum,
where the ID of FRAME is not yet known. Calling value_from_register
would therefore abort in get_frame_id. However, since we only need
a temporary value that is never used as lvalue, we actually do not
- really need to set its VALUE_FRAME_ID. Therefore, we re-implement
+ really need to set its VALUE_NEXT_FRAME_ID. Therefore, we re-implement
the core of value_from_register, but use the null_frame_id. */
/* Some targets require a special conversion routine even for plain
result = value_as_address (value);
release_value (value);
- value_free (value);
return result;
}
+#if GDB_SELF_TEST
+namespace selftests {
+namespace findvar_tests {
+
+/* Function to test copy_integer_to_size. Store SOURCE_VAL with size
+ SOURCE_SIZE to a buffer, making sure no sign extending happens at this
+ stage. Copy buffer to a new buffer using copy_integer_to_size. Extract
+ copied value and compare to DEST_VALU. Copy again with a signed
+ copy_integer_to_size and compare to DEST_VALS. Do everything for both
+ LITTLE and BIG target endians. Use unsigned values throughout to make
+ sure there are no implicit sign extensions. */
+
+static void
+do_cint_test (ULONGEST dest_valu, ULONGEST dest_vals, int dest_size,
+ ULONGEST src_val, int src_size)
+{
+ for (int i = 0; i < 2 ; i++)
+ {
+ gdb_byte srcbuf[sizeof (ULONGEST)] = {};
+ gdb_byte destbuf[sizeof (ULONGEST)] = {};
+ enum bfd_endian byte_order = i ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
+
+ /* Fill the src buffer (and later the dest buffer) with non-zero junk,
+ to ensure zero extensions aren't hidden. */
+ memset (srcbuf, 0xaa, sizeof (srcbuf));
+
+ /* Store (and later extract) using unsigned to ensure there are no sign
+ extensions. */
+ store_unsigned_integer (srcbuf, src_size, byte_order, src_val);
+
+ /* Test unsigned. */
+ memset (destbuf, 0xaa, sizeof (destbuf));
+ copy_integer_to_size (destbuf, dest_size, srcbuf, src_size, false,
+ byte_order);
+ SELF_CHECK (dest_valu == extract_unsigned_integer (destbuf, dest_size,
+ byte_order));
+
+ /* Test signed. */
+ memset (destbuf, 0xaa, sizeof (destbuf));
+ copy_integer_to_size (destbuf, dest_size, srcbuf, src_size, true,
+ byte_order);
+ SELF_CHECK (dest_vals == extract_unsigned_integer (destbuf, dest_size,
+ byte_order));
+ }
+}
+
+static void
+copy_integer_to_size_test ()
+{
+ /* Destination is bigger than the source, which has the signed bit unset. */
+ do_cint_test (0x12345678, 0x12345678, 8, 0x12345678, 4);
+ do_cint_test (0x345678, 0x345678, 8, 0x12345678, 3);
+
+ /* Destination is bigger than the source, which has the signed bit set. */
+ do_cint_test (0xdeadbeef, 0xffffffffdeadbeef, 8, 0xdeadbeef, 4);
+ do_cint_test (0xadbeef, 0xffffffffffadbeef, 8, 0xdeadbeef, 3);
+
+ /* Destination is smaller than the source. */
+ do_cint_test (0x5678, 0x5678, 2, 0x12345678, 3);
+ do_cint_test (0xbeef, 0xbeef, 2, 0xdeadbeef, 3);
+
+ /* Destination and source are the same size. */
+ do_cint_test (0x8765432112345678, 0x8765432112345678, 8, 0x8765432112345678,
+ 8);
+ do_cint_test (0x432112345678, 0x432112345678, 6, 0x8765432112345678, 6);
+ do_cint_test (0xfeedbeaddeadbeef, 0xfeedbeaddeadbeef, 8, 0xfeedbeaddeadbeef,
+ 8);
+ do_cint_test (0xbeaddeadbeef, 0xbeaddeadbeef, 6, 0xfeedbeaddeadbeef, 6);
+
+ /* Destination is bigger than the source. Source is bigger than 32bits. */
+ do_cint_test (0x3412345678, 0x3412345678, 8, 0x3412345678, 6);
+ do_cint_test (0xff12345678, 0xff12345678, 8, 0xff12345678, 6);
+ do_cint_test (0x432112345678, 0x432112345678, 8, 0x8765432112345678, 6);
+ do_cint_test (0xff2112345678, 0xffffff2112345678, 8, 0xffffff2112345678, 6);
+}
+
+} // namespace findvar_test
+} // namespace selftests
+
+#endif
+
+void _initialize_findvar ();
+void
+_initialize_findvar ()
+{
+#if GDB_SELF_TEST
+ selftests::register_test
+ ("copy_integer_to_size",
+ selftests::findvar_tests::copy_integer_to_size_test);
+#endif
+}
projects / deliverable / binutils-gdb.git / blobdiff