/* DWARF 2 location expression support for GDB.
- Copyright (C) 2003, 2005, 2007-2012 Free Software Foundation, Inc.
+ Copyright (C) 2003-2013 Free Software Foundation, Inc.
Contributed by Daniel Jacobowitz, MontaVista Software, Inc.
static struct value *dwarf2_evaluate_loc_desc_full (struct type *type,
struct frame_info *frame,
const gdb_byte *data,
- unsigned short size,
- struct dwarf2_per_cu_data *per_cu,
+ size_t size,
+ struct dwarf2_per_cu_data *per_cu,
LONGEST byte_offset);
/* Until these have formal names, we define these here.
/* This is followed by two unsigned LEB128 numbers that are indices into
.debug_addr and specify the beginning and ending addresses, and then
a normal location expression as in .debug_loc. */
- DEBUG_LOC_NORMAL = 2,
+ DEBUG_LOC_START_END = 2,
+
+ /* This is followed by an unsigned LEB128 number that is an index into
+ .debug_addr and specifies the beginning address, and a 4 byte unsigned
+ number that specifies the length, and then a normal location expression
+ as in .debug_loc. */
+ DEBUG_LOC_START_LENGTH = 3,
/* An internal value indicating there is insufficient data. */
DEBUG_LOC_BUFFER_OVERFLOW = -1,
DEBUG_LOC_INVALID_ENTRY = -2
};
+/* Helper function which throws an error if a synthetic pointer is
+ invalid. */
+
+static void
+invalid_synthetic_pointer (void)
+{
+ error (_("access outside bounds of object "
+ "referenced via synthetic pointer"));
+}
+
/* Decode the addresses in a non-dwo .debug_loc entry.
A pointer to the next byte to examine is returned in *NEW_PTR.
The encoded low,high addresses are return in *LOW,*HIGH.
if (*low == 0 && *high == 0)
return DEBUG_LOC_END_OF_LIST;
- return DEBUG_LOC_NORMAL;
+ return DEBUG_LOC_START_END;
}
/* Decode the addresses in .debug_loc.dwo entry.
const gdb_byte *loc_ptr,
const gdb_byte *buf_end,
const gdb_byte **new_ptr,
- CORE_ADDR *low, CORE_ADDR *high)
+ CORE_ADDR *low, CORE_ADDR *high,
+ enum bfd_endian byte_order)
{
uint64_t low_index, high_index;
*high = dwarf2_read_addr_index (per_cu, high_index);
*new_ptr = loc_ptr;
return DEBUG_LOC_BASE_ADDRESS;
- case DEBUG_LOC_NORMAL:
+ case DEBUG_LOC_START_END:
loc_ptr = gdb_read_uleb128 (loc_ptr, buf_end, &low_index);
if (loc_ptr == NULL)
return DEBUG_LOC_BUFFER_OVERFLOW;
return DEBUG_LOC_BUFFER_OVERFLOW;
*high = dwarf2_read_addr_index (per_cu, high_index);
*new_ptr = loc_ptr;
- return DEBUG_LOC_NORMAL;
+ return DEBUG_LOC_START_END;
+ case DEBUG_LOC_START_LENGTH:
+ loc_ptr = gdb_read_uleb128 (loc_ptr, buf_end, &low_index);
+ if (loc_ptr == NULL)
+ return DEBUG_LOC_BUFFER_OVERFLOW;
+ *low = dwarf2_read_addr_index (per_cu, low_index);
+ if (loc_ptr + 4 > buf_end)
+ return DEBUG_LOC_BUFFER_OVERFLOW;
+ *high = *low;
+ *high += extract_unsigned_integer (loc_ptr, 4, byte_order);
+ *new_ptr = loc_ptr + 4;
+ return DEBUG_LOC_START_LENGTH;
default:
return DEBUG_LOC_INVALID_ENTRY;
}
if (baton->from_dwo)
kind = decode_debug_loc_dwo_addresses (baton->per_cu,
loc_ptr, buf_end, &new_ptr,
- &low, &high);
+ &low, &high, byte_order);
else
kind = decode_debug_loc_addresses (loc_ptr, buf_end, &new_ptr,
&low, &high,
case DEBUG_LOC_BASE_ADDRESS:
base_address = high + base_offset;
continue;
- case DEBUG_LOC_NORMAL:
+ case DEBUG_LOC_START_END:
+ case DEBUG_LOC_START_LENGTH:
break;
case DEBUG_LOC_BUFFER_OVERFLOW:
case DEBUG_LOC_INVALID_ENTRY:
gdb_assert_not_reached ("bad debug_loc_kind");
}
- /* Otherwise, a location expression entry. */
- low += base_address;
- high += base_address;
+ /* Otherwise, a location expression entry.
+ If the entry is from a DWO, don't add base address: the entry is
+ from .debug_addr which has absolute addresses. */
+ if (! baton->from_dwo)
+ {
+ low += base_address;
+ high += base_address;
+ }
length = extract_unsigned_integer (loc_ptr, 2, byte_order);
loc_ptr += 2;
this_base method. */
struct symbol *framefunc;
struct dwarf_expr_baton *debaton = (struct dwarf_expr_baton *) baton;
+ struct block *bl = get_frame_block (debaton->frame, NULL);
+
+ if (bl == NULL)
+ error (_("frame address is not available."));
/* Use block_linkage_function, which returns a real (not inlined)
function, instead of get_frame_function, which may return an
inlined function. */
- framefunc = block_linkage_function (get_frame_block (debaton->frame, NULL));
+ framefunc = block_linkage_function (bl);
/* If we found a frame-relative symbol then it was certainly within
some function associated with a frame. If we can't find the frame,
start, length);
}
+/* Implement find_frame_base_location method for LOC_BLOCK functions using
+ DWARF expression for its DW_AT_frame_base. */
+
+static void
+locexpr_find_frame_base_location (struct symbol *framefunc, CORE_ADDR pc,
+ const gdb_byte **start, size_t *length)
+{
+ struct dwarf2_locexpr_baton *symbaton = SYMBOL_LOCATION_BATON (framefunc);
+
+ *length = symbaton->size;
+ *start = symbaton->data;
+}
+
+/* Vector for inferior functions as represented by LOC_BLOCK, if the inferior
+ function uses DWARF expression for its DW_AT_frame_base. */
+
+const struct symbol_block_ops dwarf2_block_frame_base_locexpr_funcs =
+{
+ locexpr_find_frame_base_location
+};
+
+/* Implement find_frame_base_location method for LOC_BLOCK functions using
+ DWARF location list for its DW_AT_frame_base. */
+
+static void
+loclist_find_frame_base_location (struct symbol *framefunc, CORE_ADDR pc,
+ const gdb_byte **start, size_t *length)
+{
+ struct dwarf2_loclist_baton *symbaton = SYMBOL_LOCATION_BATON (framefunc);
+
+ *start = dwarf2_find_location_expression (symbaton, length, pc);
+}
+
+/* Vector for inferior functions as represented by LOC_BLOCK, if the inferior
+ function uses DWARF location list for its DW_AT_frame_base. */
+
+const struct symbol_block_ops dwarf2_block_frame_base_loclist_funcs =
+{
+ loclist_find_frame_base_location
+};
+
static void
dwarf_expr_frame_base_1 (struct symbol *framefunc, CORE_ADDR pc,
const gdb_byte **start, size_t *length)
{
- if (SYMBOL_LOCATION_BATON (framefunc) == NULL)
- *length = 0;
- else if (SYMBOL_COMPUTED_OPS (framefunc) == &dwarf2_loclist_funcs)
+ if (SYMBOL_BLOCK_OPS (framefunc) != NULL)
{
- struct dwarf2_loclist_baton *symbaton;
+ const struct symbol_block_ops *ops_block = SYMBOL_BLOCK_OPS (framefunc);
- symbaton = SYMBOL_LOCATION_BATON (framefunc);
- *start = dwarf2_find_location_expression (symbaton, length, pc);
+ ops_block->find_frame_base_location (framefunc, pc, start, length);
}
else
- {
- struct dwarf2_locexpr_baton *symbaton;
-
- symbaton = SYMBOL_LOCATION_BATON (framefunc);
- if (symbaton != NULL)
- {
- *length = symbaton->size;
- *start = symbaton->data;
- }
- else
- *length = 0;
- }
+ *length = 0;
if (*length == 0)
error (_("Could not find the frame base for \"%s\"."),
{
struct dwarf2_locexpr_baton block;
- block = dwarf2_fetch_die_location_block (die_offset, per_cu,
- get_frame_pc, baton);
+ block = dwarf2_fetch_die_loc_cu_off (die_offset, per_cu, get_frame_pc, baton);
/* DW_OP_call_ref is currently not supported. */
gdb_assert (block.per_cu == per_cu);
/* See dwarf2loc.h. */
-int entry_values_debug = 0;
+unsigned int entry_values_debug = 0;
/* Helper to set entry_values_debug. */
dwarf_block = FIELD_DWARF_BLOCK (call_site->target);
if (dwarf_block == NULL)
{
- struct minimal_symbol *msym;
+ struct bound_minimal_symbol msym;
msym = lookup_minimal_symbol_by_pc (call_site->pc - 1);
throw_error (NO_ENTRY_VALUE_ERROR,
_("DW_AT_GNU_call_site_target is not specified "
"at %s in %s"),
paddress (call_site_gdbarch, call_site->pc),
- msym == NULL ? "???" : SYMBOL_PRINT_NAME (msym));
+ (msym.minsym == NULL ? "???"
+ : SYMBOL_PRINT_NAME (msym.minsym)));
}
if (caller_frame == NULL)
{
- struct minimal_symbol *msym;
+ struct bound_minimal_symbol msym;
msym = lookup_minimal_symbol_by_pc (call_site->pc - 1);
throw_error (NO_ENTRY_VALUE_ERROR,
"requires known frame which is currently not "
"available at %s in %s"),
paddress (call_site_gdbarch, call_site->pc),
- msym == NULL ? "???" : SYMBOL_PRINT_NAME (msym));
+ (msym.minsym == NULL ? "???"
+ : SYMBOL_PRINT_NAME (msym.minsym)));
}
caller_arch = get_frame_arch (caller_frame);
struct minimal_symbol *msym;
physname = FIELD_STATIC_PHYSNAME (call_site->target);
- msym = lookup_minimal_symbol_text (physname, NULL);
+
+ /* Handle both the mangled and demangled PHYSNAME. */
+ msym = lookup_minimal_symbol (physname, NULL, NULL);
if (msym == NULL)
{
- msym = lookup_minimal_symbol_by_pc (call_site->pc - 1);
+ msym = lookup_minimal_symbol_by_pc (call_site->pc - 1).minsym;
throw_error (NO_ENTRY_VALUE_ERROR,
_("Cannot find function \"%s\" for a call site target "
"at %s in %s"),
if (target_addr == verify_addr)
{
- struct minimal_symbol *msym;
+ struct bound_minimal_symbol msym;
msym = lookup_minimal_symbol_by_pc (verify_addr);
throw_error (NO_ENTRY_VALUE_ERROR,
_("DW_OP_GNU_entry_value resolving has found "
"function \"%s\" at %s can call itself via tail "
"calls"),
- msym == NULL ? "???" : SYMBOL_PRINT_NAME (msym),
+ (msym.minsym == NULL ? "???"
+ : SYMBOL_PRINT_NAME (msym.minsym)),
paddress (gdbarch, verify_addr));
}
tailcall_dump (struct gdbarch *gdbarch, const struct call_site *call_site)
{
CORE_ADDR addr = call_site->pc;
- struct minimal_symbol *msym = lookup_minimal_symbol_by_pc (addr - 1);
+ struct bound_minimal_symbol msym = lookup_minimal_symbol_by_pc (addr - 1);
fprintf_unfiltered (gdb_stdlog, " %s(%s)", paddress (gdbarch, addr),
- msym == NULL ? "???" : SYMBOL_PRINT_NAME (msym));
+ (msym.minsym == NULL ? "???"
+ : SYMBOL_PRINT_NAME (msym.minsym)));
}
call_site_find_chain_1 (struct gdbarch *gdbarch, CORE_ADDR caller_pc,
CORE_ADDR callee_pc)
{
+ CORE_ADDR save_callee_pc = callee_pc;
struct obstack addr_obstack;
struct cleanup *back_to_retval, *back_to_workdata;
struct call_site_chain *retval = NULL;
callee_pc = get_pc_function_start (callee_pc);
if (callee_pc == 0)
throw_error (NO_ENTRY_VALUE_ERROR, _("Unable to find function for PC %s"),
- paddress (gdbarch, callee_pc));
+ paddress (gdbarch, save_callee_pc));
back_to_retval = make_cleanup (free_current_contents, &retval);
if (retval == NULL)
{
- struct minimal_symbol *msym_caller, *msym_callee;
+ struct bound_minimal_symbol msym_caller, msym_callee;
msym_caller = lookup_minimal_symbol_by_pc (caller_pc);
msym_callee = lookup_minimal_symbol_by_pc (callee_pc);
_("There are no unambiguously determinable intermediate "
"callers or callees between caller function \"%s\" at %s "
"and callee function \"%s\" at %s"),
- (msym_caller == NULL
- ? "???" : SYMBOL_PRINT_NAME (msym_caller)),
+ (msym_caller.minsym == NULL
+ ? "???" : SYMBOL_PRINT_NAME (msym_caller.minsym)),
paddress (gdbarch, caller_pc),
- (msym_callee == NULL
- ? "???" : SYMBOL_PRINT_NAME (msym_callee)),
+ (msym_callee.minsym == NULL
+ ? "???" : SYMBOL_PRINT_NAME (msym_callee.minsym)),
paddress (gdbarch, callee_pc));
}
return retval;
}
-/* Fetch call_site_parameter from caller matching the parameters. FRAME is for
- callee. See DWARF_REG and FB_OFFSET description at struct
- dwarf_expr_context_funcs->push_dwarf_reg_entry_value.
+/* Return 1 if KIND and KIND_U match PARAMETER. Return 0 otherwise. */
+
+static int
+call_site_parameter_matches (struct call_site_parameter *parameter,
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u)
+{
+ if (kind == parameter->kind)
+ switch (kind)
+ {
+ case CALL_SITE_PARAMETER_DWARF_REG:
+ return kind_u.dwarf_reg == parameter->u.dwarf_reg;
+ case CALL_SITE_PARAMETER_FB_OFFSET:
+ return kind_u.fb_offset == parameter->u.fb_offset;
+ case CALL_SITE_PARAMETER_PARAM_OFFSET:
+ return kind_u.param_offset.cu_off == parameter->u.param_offset.cu_off;
+ }
+ return 0;
+}
+
+/* Fetch call_site_parameter from caller matching KIND and KIND_U.
+ FRAME is for callee.
Function always returns non-NULL, it throws NO_ENTRY_VALUE_ERROR
otherwise. */
static struct call_site_parameter *
-dwarf_expr_reg_to_entry_parameter (struct frame_info *frame, int dwarf_reg,
- CORE_ADDR fb_offset,
+dwarf_expr_reg_to_entry_parameter (struct frame_info *frame,
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u,
struct dwarf2_per_cu_data **per_cu_return)
{
- CORE_ADDR func_addr = get_frame_func (frame);
- CORE_ADDR caller_pc;
- struct gdbarch *gdbarch = get_frame_arch (frame);
- struct frame_info *caller_frame = get_prev_frame (frame);
+ CORE_ADDR func_addr, caller_pc;
+ struct gdbarch *gdbarch;
+ struct frame_info *caller_frame;
struct call_site *call_site;
int iparams;
/* Initialize it just to avoid a GCC false warning. */
struct call_site_parameter *parameter = NULL;
CORE_ADDR target_addr;
+ while (get_frame_type (frame) == INLINE_FRAME)
+ {
+ frame = get_prev_frame (frame);
+ gdb_assert (frame != NULL);
+ }
+
+ func_addr = get_frame_func (frame);
+ gdbarch = get_frame_arch (frame);
+ caller_frame = get_prev_frame (frame);
if (gdbarch != frame_unwind_arch (frame))
{
- struct minimal_symbol *msym = lookup_minimal_symbol_by_pc (func_addr);
+ struct bound_minimal_symbol msym
+ = lookup_minimal_symbol_by_pc (func_addr);
struct gdbarch *caller_gdbarch = frame_unwind_arch (frame);
throw_error (NO_ENTRY_VALUE_ERROR,
"(of %s (%s)) does not match caller gdbarch %s"),
gdbarch_bfd_arch_info (gdbarch)->printable_name,
paddress (gdbarch, func_addr),
- msym == NULL ? "???" : SYMBOL_PRINT_NAME (msym),
+ (msym.minsym == NULL ? "???"
+ : SYMBOL_PRINT_NAME (msym.minsym)),
gdbarch_bfd_arch_info (caller_gdbarch)->printable_name);
}
if (caller_frame == NULL)
{
- struct minimal_symbol *msym = lookup_minimal_symbol_by_pc (func_addr);
+ struct bound_minimal_symbol msym
+ = lookup_minimal_symbol_by_pc (func_addr);
throw_error (NO_ENTRY_VALUE_ERROR, _("DW_OP_GNU_entry_value resolving "
"requires caller of %s (%s)"),
paddress (gdbarch, func_addr),
- msym == NULL ? "???" : SYMBOL_PRINT_NAME (msym));
+ (msym.minsym == NULL ? "???"
+ : SYMBOL_PRINT_NAME (msym.minsym)));
}
caller_pc = get_frame_pc (caller_frame);
call_site = call_site_for_pc (gdbarch, caller_pc);
{
struct minimal_symbol *target_msym, *func_msym;
- target_msym = lookup_minimal_symbol_by_pc (target_addr);
- func_msym = lookup_minimal_symbol_by_pc (func_addr);
+ target_msym = lookup_minimal_symbol_by_pc (target_addr).minsym;
+ func_msym = lookup_minimal_symbol_by_pc (func_addr).minsym;
throw_error (NO_ENTRY_VALUE_ERROR,
_("DW_OP_GNU_entry_value resolving expects callee %s at %s "
"but the called frame is for %s at %s"),
for (iparams = 0; iparams < call_site->parameter_count; iparams++)
{
parameter = &call_site->parameter[iparams];
- if (parameter->dwarf_reg == -1 && dwarf_reg == -1)
- {
- if (parameter->fb_offset == fb_offset)
- break;
- }
- else if (parameter->dwarf_reg == dwarf_reg)
+ if (call_site_parameter_matches (parameter, kind, kind_u))
break;
}
if (iparams == call_site->parameter_count)
{
- struct minimal_symbol *msym = lookup_minimal_symbol_by_pc (caller_pc);
+ struct minimal_symbol *msym
+ = lookup_minimal_symbol_by_pc (caller_pc).minsym;
/* DW_TAG_GNU_call_site_parameter will be missing just if GCC could not
determine its value. */
return dwarf2_evaluate_loc_desc (type, caller_frame, data, size + 1, per_cu);
}
-/* Execute call_site_parameter's DWARF block matching DEREF_SIZE for caller of
- the CTX's frame. CTX must be of dwarf_expr_ctx_funcs kind. See DWARF_REG
- and FB_OFFSET description at struct
- dwarf_expr_context_funcs->push_dwarf_reg_entry_value.
+/* Execute DWARF block of call_site_parameter which matches KIND and KIND_U.
+ Choose DEREF_SIZE value of that parameter. Search caller of the CTX's
+ frame. CTX must be of dwarf_expr_ctx_funcs kind.
The CTX caller can be from a different CU - per_cu_dwarf_call implementation
can be more simple as it does not support cross-CU DWARF executions. */
static void
dwarf_expr_push_dwarf_reg_entry_value (struct dwarf_expr_context *ctx,
- int dwarf_reg, CORE_ADDR fb_offset,
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u,
int deref_size)
{
struct dwarf_expr_baton *debaton;
frame = debaton->frame;
caller_frame = get_prev_frame (frame);
- parameter = dwarf_expr_reg_to_entry_parameter (frame, dwarf_reg, fb_offset,
+ parameter = dwarf_expr_reg_to_entry_parameter (frame, kind, kind_u,
&caller_per_cu);
data_src = deref_size == -1 ? parameter->value : parameter->data_value;
size = deref_size == -1 ? parameter->value_size : parameter->data_value_size;
entry_data_value_free_closure
};
-/* Read parameter of TYPE at (callee) FRAME's function entry. DWARF_REG and
- FB_OFFSET are used to match DW_AT_location at the caller's
- DW_TAG_GNU_call_site_parameter. See DWARF_REG and FB_OFFSET description at
- struct dwarf_expr_context_funcs->push_dwarf_reg_entry_value.
+/* Read parameter of TYPE at (callee) FRAME's function entry. KIND and KIND_U
+ are used to match DW_AT_location at the caller's
+ DW_TAG_GNU_call_site_parameter.
Function always returns non-NULL value. It throws NO_ENTRY_VALUE_ERROR if it
cannot resolve the parameter for any reason. */
static struct value *
value_of_dwarf_reg_entry (struct type *type, struct frame_info *frame,
- int dwarf_reg, CORE_ADDR fb_offset)
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u)
{
struct type *checked_type = check_typedef (type);
struct type *target_type = TYPE_TARGET_TYPE (checked_type);
struct dwarf2_per_cu_data *caller_per_cu;
CORE_ADDR addr;
- parameter = dwarf_expr_reg_to_entry_parameter (frame, dwarf_reg, fb_offset,
+ parameter = dwarf_expr_reg_to_entry_parameter (frame, kind, kind_u,
&caller_per_cu);
outer_val = dwarf_entry_parameter_to_value (parameter, -1 /* deref_size */,
value_of_dwarf_block_entry (struct type *type, struct frame_info *frame,
const gdb_byte *block, size_t block_len)
{
- int dwarf_reg;
- CORE_ADDR fb_offset;
+ union call_site_parameter_u kind_u;
- dwarf_reg = dwarf_block_to_dwarf_reg (block, block + block_len);
- if (dwarf_reg != -1)
- return value_of_dwarf_reg_entry (type, frame, dwarf_reg, 0 /* unused */);
+ kind_u.dwarf_reg = dwarf_block_to_dwarf_reg (block, block + block_len);
+ if (kind_u.dwarf_reg != -1)
+ return value_of_dwarf_reg_entry (type, frame, CALL_SITE_PARAMETER_DWARF_REG,
+ kind_u);
- if (dwarf_block_to_fb_offset (block, block + block_len, &fb_offset))
- return value_of_dwarf_reg_entry (type, frame, -1, fb_offset);
+ if (dwarf_block_to_fb_offset (block, block + block_len, &kind_u.fb_offset))
+ return value_of_dwarf_reg_entry (type, frame, CALL_SITE_PARAMETER_FB_OFFSET,
+ kind_u);
/* This can normally happen - throw NO_ENTRY_VALUE_ERROR to get the message
suppressed during normal operation. The expression can be arbitrary if
struct frame_info *frame = frame_find_by_id (VALUE_FRAME_ID (v));
size_t type_len;
size_t buffer_size = 0;
- char *buffer = NULL;
+ gdb_byte *buffer = NULL;
struct cleanup *cleanup;
int bits_big_endian
= gdbarch_bits_big_endian (get_type_arch (value_type (v)));
struct frame_info *frame = frame_find_by_id (VALUE_FRAME_ID (to));
size_t type_len;
size_t buffer_size = 0;
- char *buffer = NULL;
+ gdb_byte *buffer = NULL;
struct cleanup *cleanup;
int bits_big_endian
= gdbarch_bits_big_endian (get_type_arch (value_type (to)));
byte_offset = value_as_address (value);
gdb_assert (piece);
- baton = dwarf2_fetch_die_location_block (piece->v.ptr.die, c->per_cu,
- get_frame_address_in_block_wrapper,
- frame);
+ baton
+ = dwarf2_fetch_die_loc_sect_off (piece->v.ptr.die, c->per_cu,
+ get_frame_address_in_block_wrapper,
+ frame);
+
+ if (baton.data != NULL)
+ return dwarf2_evaluate_loc_desc_full (TYPE_TARGET_TYPE (type), frame,
+ baton.data, baton.size, baton.per_cu,
+ piece->v.ptr.offset + byte_offset);
+
+ {
+ struct obstack temp_obstack;
+ struct cleanup *cleanup;
+ const gdb_byte *bytes;
+ LONGEST len;
+ struct value *result;
+
+ obstack_init (&temp_obstack);
+ cleanup = make_cleanup_obstack_free (&temp_obstack);
+
+ bytes = dwarf2_fetch_constant_bytes (piece->v.ptr.die, c->per_cu,
+ &temp_obstack, &len);
+ if (bytes == NULL)
+ result = allocate_optimized_out_value (TYPE_TARGET_TYPE (type));
+ else
+ {
+ if (byte_offset < 0
+ || byte_offset + TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > len)
+ invalid_synthetic_pointer ();
+ bytes += byte_offset;
+ result = value_from_contents (TYPE_TARGET_TYPE (type), bytes);
+ }
- return dwarf2_evaluate_loc_desc_full (TYPE_TARGET_TYPE (type), frame,
- baton.data, baton.size, baton.per_cu,
- piece->v.ptr.offset + byte_offset);
+ do_cleanups (cleanup);
+ return result;
+ }
}
static void *
free_pieced_value_closure
};
-/* Helper function which throws an error if a synthetic pointer is
- invalid. */
-
-static void
-invalid_synthetic_pointer (void)
-{
- error (_("access outside bounds of object "
- "referenced via synthetic pointer"));
-}
-
/* Virtual method table for dwarf2_evaluate_loc_desc_full below. */
static const struct dwarf_expr_context_funcs dwarf_expr_ctx_funcs =
static struct value *
dwarf2_evaluate_loc_desc_full (struct type *type, struct frame_info *frame,
- const gdb_byte *data, unsigned short size,
+ const gdb_byte *data, size_t size,
struct dwarf2_per_cu_data *per_cu,
LONGEST byte_offset)
{
struct value *
dwarf2_evaluate_loc_desc (struct type *type, struct frame_info *frame,
- const gdb_byte *data, unsigned short size,
+ const gdb_byte *data, size_t size,
struct dwarf2_per_cu_data *per_cu)
{
return dwarf2_evaluate_loc_desc_full (type, frame, data, size, per_cu, 0);
static void
needs_dwarf_reg_entry_value (struct dwarf_expr_context *ctx,
- int dwarf_reg, CORE_ADDR fb_offset, int deref_size)
+ enum call_site_parameter_kind kind,
+ union call_site_parameter_u kind_u, int deref_size)
{
struct needs_frame_baton *nf_baton = ctx->baton;
nf_baton->needs_frame = 1;
+
+ /* The expression may require some stub values on DWARF stack. */
+ dwarf_expr_push_address (ctx, 0, 0);
}
/* DW_OP_GNU_addr_index doesn't require a frame. */
requires a frame to evaluate. */
static int
-dwarf2_loc_desc_needs_frame (const gdb_byte *data, unsigned short size,
+dwarf2_loc_desc_needs_frame (const gdb_byte *data, size_t size,
struct dwarf2_per_cu_data *per_cu)
{
struct needs_frame_baton baton;
{
ULONGEST nbytes = (nbits + 7) / 8;
- gdb_assert (nbits > 0 && nbits <= sizeof (LONGEST));
+ gdb_assert (nbytes > 0 && nbytes <= sizeof (LONGEST));
- if (trace_kludge)
+ if (expr->tracing)
ax_trace_quick (expr, nbytes);
if (nbits <= 8)
size_t datalen;
struct block *b;
struct symbol *framefunc;
- LONGEST base_offset = 0;
b = block_for_pc (expr->scope);
op_ptr = safe_read_sleb128 (op_ptr, op_end, &offset);
dwarf2_compile_expr_to_ax (expr, loc, arch, addr_size, datastart,
datastart + datalen, per_cu);
+ if (loc->kind == axs_lvalue_register)
+ require_rvalue (expr, loc);
if (offset != 0)
{
else
size = addr_size;
- switch (size)
- {
- case 8:
- ax_simple (expr, aop_ref8);
- break;
- case 16:
- ax_simple (expr, aop_ref16);
- break;
- case 32:
- ax_simple (expr, aop_ref32);
- break;
- case 64:
- ax_simple (expr, aop_ref64);
- break;
- default:
- /* Note that get_DW_OP_name will never return
- NULL here. */
- error (_("Unsupported size %d in %s"),
- size, get_DW_OP_name (op));
- }
+ if (size != 1 && size != 2 && size != 4 && size != 8)
+ error (_("Unsupported size %d in %s"),
+ size, get_DW_OP_name (op));
+ access_memory (arch, expr, size * TARGET_CHAR_BIT);
}
break;
op_ptr += size;
offset.cu_off = uoffset;
- block = dwarf2_fetch_die_location_block (offset, per_cu,
- get_ax_pc, expr);
+ block = dwarf2_fetch_die_loc_cu_off (offset, per_cu,
+ get_ax_pc, expr);
/* DW_OP_call_ref is currently not supported. */
gdb_assert (block.per_cu == per_cu);
static const gdb_byte *
locexpr_describe_location_piece (struct symbol *symbol, struct ui_file *stream,
CORE_ADDR addr, struct objfile *objfile,
+ struct dwarf2_per_cu_data *per_cu,
const gdb_byte *data, const gdb_byte *end,
unsigned int addr_size)
{
struct gdbarch *gdbarch = get_objfile_arch (objfile);
+ size_t leb128_size;
if (data[0] >= DW_OP_reg0 && data[0] <= DW_OP_reg31)
{
data += 1 + addr_size + 1;
}
+
+ /* With -gsplit-dwarf a TLS variable can also look like this:
+ DW_AT_location : 3 byte block: fc 4 e0
+ (DW_OP_GNU_const_index: 4;
+ DW_OP_GNU_push_tls_address) */
+ else if (data + 3 <= end
+ && data + 1 + (leb128_size = skip_leb128 (data + 1, end)) < end
+ && data[0] == DW_OP_GNU_const_index
+ && leb128_size > 0
+ && data[1 + leb128_size] == DW_OP_GNU_push_tls_address
+ && piece_end_p (data + 2 + leb128_size, end))
+ {
+ uint64_t offset;
+
+ data = safe_read_uleb128 (data + 1, end, &offset);
+ offset = dwarf2_read_addr_index (per_cu, offset);
+ fprintf_filtered (stream,
+ _("a thread-local variable at offset 0x%s "
+ "in the thread-local storage for `%s'"),
+ phex_nz (offset, addr_size), objfile->name);
+ ++data;
+ }
+
else if (data[0] >= DW_OP_lit0
&& data[0] <= DW_OP_lit31
&& data + 1 < end
all, per_cu);
data += ul;
continue;
+
+ case DW_OP_GNU_parameter_ref:
+ ul = extract_unsigned_integer (data, 4, gdbarch_byte_order (arch));
+ data += 4;
+ fprintf_filtered (stream, " offset %s", phex_nz (ul, 4));
+ break;
+
+ case DW_OP_GNU_addr_index:
+ data = safe_read_uleb128 (data, end, &ul);
+ ul = dwarf2_read_addr_index (per_cu, ul);
+ fprintf_filtered (stream, " 0x%s", phex_nz (ul, addr_size));
+ break;
+ case DW_OP_GNU_const_index:
+ data = safe_read_uleb128 (data, end, &ul);
+ ul = dwarf2_read_addr_index (per_cu, ul);
+ fprintf_filtered (stream, " %s", pulongest (ul));
+ break;
}
fprintf_filtered (stream, "\n");
static void
locexpr_describe_location_1 (struct symbol *symbol, CORE_ADDR addr,
struct ui_file *stream,
- const gdb_byte *data, int size,
+ const gdb_byte *data, size_t size,
struct objfile *objfile, unsigned int addr_size,
int offset_size, struct dwarf2_per_cu_data *per_cu)
{
if (!dwarf2_always_disassemble)
{
data = locexpr_describe_location_piece (symbol, stream,
- addr, objfile,
+ addr, objfile, per_cu,
data, end, addr_size);
/* If we printed anything, or if we have an empty piece,
then don't disassemble. */
locexpr_read_variable_at_entry,
locexpr_read_needs_frame,
locexpr_describe_location,
+ 0, /* location_has_loclist */
locexpr_tracepoint_var_ref
};
{
struct dwarf2_loclist_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol);
const gdb_byte *loc_ptr, *buf_end;
- int 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);
if (dlbaton->from_dwo)
kind = decode_debug_loc_dwo_addresses (dlbaton->per_cu,
loc_ptr, buf_end, &new_ptr,
- &low, &high);
+ &low, &high, byte_order);
else
kind = decode_debug_loc_addresses (loc_ptr, buf_end, &new_ptr,
&low, &high,
fprintf_filtered (stream, _(" Base address %s"),
paddress (gdbarch, base_address));
continue;
- case DEBUG_LOC_NORMAL:
+ case DEBUG_LOC_START_END:
+ case DEBUG_LOC_START_LENGTH:
break;
case DEBUG_LOC_BUFFER_OVERFLOW:
case DEBUG_LOC_INVALID_ENTRY:
loclist_read_variable_at_entry,
loclist_read_needs_frame,
loclist_describe_location,
+ 1, /* location_has_loclist */
loclist_tracepoint_var_ref
};
void
_initialize_dwarf2loc (void)
{
- add_setshow_zinteger_cmd ("entry-values", class_maintenance,
- &entry_values_debug,
- _("Set entry values and tail call frames "
- "debugging."),
- _("Show entry values and tail call frames "
- "debugging."),
- _("When non-zero, the process of determining "
- "parameter values from function entry point "
- "and tail call frames will be printed."),
- NULL,
- show_entry_values_debug,
- &setdebuglist, &showdebuglist);
+ add_setshow_zuinteger_cmd ("entry-values", class_maintenance,
+ &entry_values_debug,
+ _("Set entry values and tail call frames "
+ "debugging."),
+ _("Show entry values and tail call frames "
+ "debugging."),
+ _("When non-zero, the process of determining "
+ "parameter values from function entry point "
+ "and tail call frames will be printed."),
+ NULL,
+ show_entry_values_debug,
+ &setdebuglist, &showdebuglist);
}
projects / deliverable / binutils-gdb.git / blobdiff