/* Cache and manage frames for GDB, the GNU debugger.
- Copyright (C) 1986-2019 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
static struct frame_info *sentinel_frame;
+/* Number of calls to reinit_frame_cache. */
+static unsigned int frame_cache_generation = 0;
+
+/* See frame.h. */
+
+unsigned int
+get_frame_cache_generation ()
+{
+ return frame_cache_generation;
+}
+
/* The values behind the global "set backtrace ..." settings. */
set_backtrace_options user_set_backtrace_options;
CC_UNAVAILABLE
};
+enum class frame_id_status
+{
+ /* Frame id is not computed. */
+ NOT_COMPUTED = 0,
+
+ /* Frame id is being computed (compute_frame_id is active). */
+ COMPUTING,
+
+ /* Frame id has been computed. */
+ COMPUTED,
+};
+
/* We keep a cache of stack frames, each of which is a "struct
frame_info". The innermost one gets allocated (in
wait_for_inferior) each time the inferior stops; sentinel_frame
/* Cached copy of the previous frame's architecture. */
struct
{
- int p;
+ bool p;
struct gdbarch *arch;
} prev_arch;
/* Cached copy of the previous frame's resume address. */
struct {
- enum cached_copy_status status;
+ cached_copy_status status;
+ /* Did VALUE require unmasking when being read. */
+ bool masked;
CORE_ADDR value;
} prev_pc;
-
+
/* Cached copy of the previous frame's function address. */
struct
{
CORE_ADDR addr;
- int p;
+ cached_copy_status status;
} prev_func;
-
+
/* This frame's ID. */
struct
{
- int p;
+ frame_id_status p;
struct frame_id value;
} this_id;
-
+
/* The frame's high-level base methods, and corresponding cache.
The high level base methods are selected based on the frame's
debug info. */
/* Pointers to the next (down, inner, younger) and previous (up,
outer, older) frame_info's in the frame cache. */
struct frame_info *next; /* down, inner, younger */
- int prev_p;
+ bool prev_p;
struct frame_info *prev; /* up, outer, older */
/* The reason why we could not set PREV, or UNWIND_NO_REASON if we
const char *stop_string;
};
+/* See frame.h. */
+
+void
+set_frame_previous_pc_masked (struct frame_info *frame)
+{
+ frame->prev_pc.masked = true;
+}
+
+/* See frame.h. */
+
+bool
+get_frame_pc_masked (const struct frame_info *frame)
+{
+ gdb_assert (frame->next != nullptr);
+ gdb_assert (frame->next->prev_pc.status == CC_VALUE);
+
+ return frame->next->prev_pc.masked;
+}
+
/* A frame stash used to speed up frame lookups. Create a hash table
to stash frames previously accessed from the frame cache for
quicker subsequent retrieval. The hash table is emptied whenever
Returns false if a frame with the same ID was already stashed, true
otherwise. */
-static int
-frame_stash_add (struct frame_info *frame)
+static bool
+frame_stash_add (frame_info *frame)
{
- struct frame_info **slot;
-
/* Do not try to stash the sentinel frame. */
gdb_assert (frame->level >= 0);
- slot = (struct frame_info **) htab_find_slot (frame_stash,
- frame,
- INSERT);
+ frame_info **slot = (struct frame_info **) htab_find_slot (frame_stash,
+ frame, INSERT);
/* If we already have a frame in the stack with the same id, we
either have a stack cycle (corrupted stack?), or some bug
elsewhere in GDB. In any case, ignore the duplicate and return
an indication to the caller. */
- if (*slot != NULL)
- return 0;
+ if (*slot != nullptr)
+ return false;
*slot = frame;
- return 1;
+ return true;
}
/* Internal function to search the frame stash for an entry with the
fprintf_unfiltered (file, "stack=<unavailable>");
else if (id.stack_status == FID_STACK_SENTINEL)
fprintf_unfiltered (file, "stack=<sentinel>");
+ else if (id.stack_status == FID_STACK_OUTER)
+ fprintf_unfiltered (file, "stack=<outer>");
else
fprintf_unfiltered (file, "stack=%s", hex_string (id.stack_addr));
+
fprintf_unfiltered (file, ",");
fprint_field (file, "code", id.code_addr_p, id.code_addr);
fprintf_unfiltered (file, "<NULL frame>");
return;
}
+
fprintf_unfiltered (file, "{");
fprintf_unfiltered (file, "level=%d", fi->level);
fprintf_unfiltered (file, ",");
+
fprintf_unfiltered (file, "type=");
if (fi->unwind != NULL)
fprint_frame_type (file, fi->unwind->type);
else
fprintf_unfiltered (file, "<unknown>");
fprintf_unfiltered (file, ",");
+
fprintf_unfiltered (file, "unwind=");
if (fi->unwind != NULL)
gdb_print_host_address (fi->unwind, file);
else
fprintf_unfiltered (file, "<unknown>");
fprintf_unfiltered (file, ",");
+
fprintf_unfiltered (file, "pc=");
if (fi->next == NULL || fi->next->prev_pc.status == CC_UNKNOWN)
fprintf_unfiltered (file, "<unknown>");
else if (fi->next->prev_pc.status == CC_VALUE)
- fprintf_unfiltered (file, "%s",
- hex_string (fi->next->prev_pc.value));
+ {
+ fprintf_unfiltered (file, "%s", hex_string (fi->next->prev_pc.value));
+ if (fi->next->prev_pc.masked)
+ fprintf_unfiltered (file, "[PAC]");
+ }
else if (fi->next->prev_pc.status == CC_NOT_SAVED)
val_print_not_saved (file);
else if (fi->next->prev_pc.status == CC_UNAVAILABLE)
val_print_unavailable (file);
fprintf_unfiltered (file, ",");
+
fprintf_unfiltered (file, "id=");
- if (fi->this_id.p)
- fprint_frame_id (file, fi->this_id.value);
+ if (fi->this_id.p == frame_id_status::NOT_COMPUTED)
+ fprintf_unfiltered (file, "<not computed>");
+ else if (fi->this_id.p == frame_id_status::COMPUTING)
+ fprintf_unfiltered (file, "<computing>");
else
- fprintf_unfiltered (file, "<unknown>");
+ fprint_frame_id (file, fi->this_id.value);
fprintf_unfiltered (file, ",");
+
fprintf_unfiltered (file, "func=");
- if (fi->next != NULL && fi->next->prev_func.p)
+ if (fi->next != NULL && fi->next->prev_func.status == CC_VALUE)
fprintf_unfiltered (file, "%s", hex_string (fi->next->prev_func.addr));
else
fprintf_unfiltered (file, "<unknown>");
static void
compute_frame_id (struct frame_info *fi)
{
- gdb_assert (!fi->this_id.p);
+ gdb_assert (fi->this_id.p == frame_id_status::NOT_COMPUTED);
- if (frame_debug)
- fprintf_unfiltered (gdb_stdlog, "{ compute_frame_id (fi=%d) ",
- fi->level);
- /* Find the unwinder. */
- if (fi->unwind == NULL)
- frame_unwind_find_by_frame (fi, &fi->prologue_cache);
- /* Find THIS frame's ID. */
- /* Default to outermost if no ID is found. */
- fi->this_id.value = outer_frame_id;
- fi->unwind->this_id (fi, &fi->prologue_cache, &fi->this_id.value);
- gdb_assert (frame_id_p (fi->this_id.value));
- fi->this_id.p = 1;
- if (frame_debug)
+ unsigned int entry_generation = get_frame_cache_generation ();
+
+ try
{
- fprintf_unfiltered (gdb_stdlog, "-> ");
- fprint_frame_id (gdb_stdlog, fi->this_id.value);
- fprintf_unfiltered (gdb_stdlog, " }\n");
+ /* Mark this frame's id as "being computed. */
+ fi->this_id.p = frame_id_status::COMPUTING;
+
+ if (frame_debug)
+ fprintf_unfiltered (gdb_stdlog, "{ compute_frame_id (fi=%d) ",
+ fi->level);
+
+ /* Find the unwinder. */
+ if (fi->unwind == NULL)
+ frame_unwind_find_by_frame (fi, &fi->prologue_cache);
+
+ /* Find THIS frame's ID. */
+ /* Default to outermost if no ID is found. */
+ fi->this_id.value = outer_frame_id;
+ fi->unwind->this_id (fi, &fi->prologue_cache, &fi->this_id.value);
+ gdb_assert (frame_id_p (fi->this_id.value));
+
+ /* Mark this frame's id as "computed". */
+ fi->this_id.p = frame_id_status::COMPUTED;
+
+ if (frame_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog, "-> ");
+ fprint_frame_id (gdb_stdlog, fi->this_id.value);
+ fprintf_unfiltered (gdb_stdlog, " }\n");
+ }
+ }
+ catch (const gdb_exception &ex)
+ {
+ /* On error, revert the frame id status to not computed. If the frame
+ cache generation changed, the frame object doesn't exist anymore, so
+ don't touch it. */
+ if (get_frame_cache_generation () == entry_generation)
+ fi->this_id.p = frame_id_status::NOT_COMPUTED;
+
+ throw;
}
}
if (fi == NULL)
return null_frame_id;
- if (!fi->this_id.p)
- {
- int stashed;
+ /* It's always invalid to try to get a frame's id while it is being
+ computed. */
+ gdb_assert (fi->this_id.p != frame_id_status::COMPUTING);
+ if (fi->this_id.p == frame_id_status::NOT_COMPUTED)
+ {
/* If we haven't computed the frame id yet, then it must be that
this is the current frame. Compute it now, and stash the
result. The IDs of other frames are computed as soon as
/* Since this is the first frame in the chain, this should
always succeed. */
- stashed = frame_stash_add (fi);
+ bool stashed = frame_stash_add (fi);
gdb_assert (stashed);
}
const struct frame_id null_frame_id = { 0 }; /* All zeros. */
const struct frame_id sentinel_frame_id = { 0, 0, 0, FID_STACK_SENTINEL, 0, 1, 0 };
-const struct frame_id outer_frame_id = { 0, 0, 0, FID_STACK_INVALID, 0, 1, 0 };
+const struct frame_id outer_frame_id = { 0, 0, 0, FID_STACK_OUTER, 0, 1, 0 };
struct frame_id
frame_id_build_special (CORE_ADDR stack_addr, CORE_ADDR code_addr,
id.stack_addr = stack_addr;
id.stack_status = FID_STACK_VALID;
id.code_addr = code_addr;
- id.code_addr_p = 1;
+ id.code_addr_p = true;
id.special_addr = special_addr;
- id.special_addr_p = 1;
+ id.special_addr_p = true;
return id;
}
id.stack_status = FID_STACK_UNAVAILABLE;
id.code_addr = code_addr;
- id.code_addr_p = 1;
+ id.code_addr_p = true;
return id;
}
id.stack_status = FID_STACK_UNAVAILABLE;
id.code_addr = code_addr;
- id.code_addr_p = 1;
+ id.code_addr_p = true;
id.special_addr = special_addr;
- id.special_addr_p = 1;
+ id.special_addr_p = true;
return id;
}
id.stack_addr = stack_addr;
id.stack_status = FID_STACK_VALID;
id.code_addr = code_addr;
- id.code_addr_p = 1;
+ id.code_addr_p = true;
return id;
}
return id;
}
-int
-frame_id_p (struct frame_id l)
+bool
+frame_id_p (frame_id l)
{
- int p;
-
/* The frame is valid iff it has a valid stack address. */
- p = l.stack_status != FID_STACK_INVALID;
- /* outer_frame_id is also valid. */
- if (!p && memcmp (&l, &outer_frame_id, sizeof (l)) == 0)
- p = 1;
+ bool p = l.stack_status != FID_STACK_INVALID;
+
if (frame_debug)
{
fprintf_unfiltered (gdb_stdlog, "{ frame_id_p (l=");
fprint_frame_id (gdb_stdlog, l);
fprintf_unfiltered (gdb_stdlog, ") -> %d }\n", p);
}
+
return p;
}
-int
-frame_id_artificial_p (struct frame_id l)
+bool
+frame_id_artificial_p (frame_id l)
{
if (!frame_id_p (l))
- return 0;
+ return false;
- return (l.artificial_depth != 0);
+ return l.artificial_depth != 0;
}
-int
-frame_id_eq (struct frame_id l, struct frame_id r)
-{
- int eq;
-
- if (l.stack_status == FID_STACK_INVALID && l.special_addr_p
- && r.stack_status == FID_STACK_INVALID && r.special_addr_p)
- /* The outermost frame marker is equal to itself. This is the
- dodgy thing about outer_frame_id, since between execution steps
- we might step into another function - from which we can't
- unwind either. More thought required to get rid of
- outer_frame_id. */
- eq = 1;
- else if (l.stack_status == FID_STACK_INVALID
- || r.stack_status == FID_STACK_INVALID)
+bool
+frame_id_eq (frame_id l, frame_id r)
+{
+ bool eq;
+
+ if (l.stack_status == FID_STACK_INVALID
+ || r.stack_status == FID_STACK_INVALID)
/* Like a NaN, if either ID is invalid, the result is false.
Note that a frame ID is invalid iff it is the null frame ID. */
- eq = 0;
+ eq = false;
else if (l.stack_status != r.stack_status || l.stack_addr != r.stack_addr)
/* If .stack addresses are different, the frames are different. */
- eq = 0;
+ eq = false;
else if (l.code_addr_p && r.code_addr_p && l.code_addr != r.code_addr)
/* An invalid code addr is a wild card. If .code addresses are
different, the frames are different. */
- eq = 0;
+ eq = false;
else if (l.special_addr_p && r.special_addr_p
&& l.special_addr != r.special_addr)
/* An invalid special addr is a wild card (or unused). Otherwise
if special addresses are different, the frames are different. */
- eq = 0;
+ eq = false;
else if (l.artificial_depth != r.artificial_depth)
- /* If artifical depths are different, the frames must be different. */
- eq = 0;
+ /* If artificial depths are different, the frames must be different. */
+ eq = false;
else
/* Frames are equal. */
- eq = 1;
+ eq = true;
if (frame_debug)
{
fprint_frame_id (gdb_stdlog, r);
fprintf_unfiltered (gdb_stdlog, ") -> %d }\n", eq);
}
+
return eq;
}
a stack overflow strategy that cause the handler to be run on a
different stack. */
-static int
+static bool
frame_id_inner (struct gdbarch *gdbarch, struct frame_id l, struct frame_id r)
{
- int inner;
+ bool inner;
if (l.stack_status != FID_STACK_VALID || r.stack_status != FID_STACK_VALID)
/* Like NaN, any operation involving an invalid ID always fails.
Likewise if either ID has an unavailable stack address. */
- inner = 0;
+ inner = false;
else if (l.artificial_depth > r.artificial_depth
&& l.stack_addr == r.stack_addr
&& l.code_addr_p == r.code_addr_p
if (lb == NULL || rb == NULL)
/* Something's gone wrong. */
- inner = 0;
+ inner = false;
else
/* This will return true if LB and RB are the same block, or
if the block with the smaller depth lexically encloses the
functions are not strictly inner than (same .stack but
different .code and/or .special address). */
inner = gdbarch_inner_than (gdbarch, l.stack_addr, r.stack_addr);
+
if (frame_debug)
{
fprintf_unfiltered (gdb_stdlog, "{ frame_id_inner (l=");
fprint_frame_id (gdb_stdlog, r);
fprintf_unfiltered (gdb_stdlog, ") -> %d }\n", inner);
}
+
return inner;
}
{
struct gdbarch *prev_gdbarch;
CORE_ADDR pc = 0;
- int pc_p = 0;
+ bool pc_p = false;
/* The right way. The `pure' way. The one true way. This
method depends solely on the register-unwind code to
try
{
pc = gdbarch_unwind_pc (prev_gdbarch, this_frame);
- pc_p = 1;
+ pc_p = true;
}
catch (const gdb_exception_error &ex)
{
return frame_unwind_pc (this_frame);
}
-int
-get_frame_func_if_available (struct frame_info *this_frame, CORE_ADDR *pc)
+bool
+get_frame_func_if_available (frame_info *this_frame, CORE_ADDR *pc)
{
struct frame_info *next_frame = this_frame->next;
- if (!next_frame->prev_func.p)
+ if (next_frame->prev_func.status == CC_UNKNOWN)
{
CORE_ADDR addr_in_block;
found. */
if (!get_frame_address_in_block_if_available (this_frame, &addr_in_block))
{
- next_frame->prev_func.p = -1;
+ next_frame->prev_func.status = CC_UNAVAILABLE;
if (frame_debug)
fprintf_unfiltered (gdb_stdlog,
"{ get_frame_func (this_frame=%d)"
}
else
{
- next_frame->prev_func.p = 1;
+ next_frame->prev_func.status = CC_VALUE;
next_frame->prev_func.addr = get_pc_function_start (addr_in_block);
if (frame_debug)
fprintf_unfiltered (gdb_stdlog,
}
}
- if (next_frame->prev_func.p < 0)
+ if (next_frame->prev_func.status == CC_UNAVAILABLE)
{
*pc = -1;
- return 0;
+ return false;
}
else
{
+ gdb_assert (next_frame->prev_func.status == CC_VALUE);
+
*pc = next_frame->prev_func.addr;
- return 1;
+ return true;
}
}
if (value_optimized_out (value))
{
fprintf_unfiltered (gdb_stdlog, " ");
- val_print_optimized_out (value, gdb_stdlog);
+ val_print_not_saved (gdb_stdlog);
}
else
{
return frame_unwind_register_unsigned (frame->next, regnum);
}
-int
-read_frame_register_unsigned (struct frame_info *frame, int regnum,
+bool
+read_frame_register_unsigned (frame_info *frame, int regnum,
ULONGEST *val)
{
struct value *regval = get_frame_register_value (frame, regnum);
int size = register_size (gdbarch, VALUE_REGNUM (regval));
*val = extract_unsigned_integer (value_contents (regval), size, byte_order);
- return 1;
+ return true;
}
- return 0;
+ return false;
}
void
Returns 0 if the register value could not be found. */
-int
-deprecated_frame_register_read (struct frame_info *frame, int regnum,
- gdb_byte *myaddr)
+bool
+deprecated_frame_register_read (frame_info *frame, int regnum,
+ gdb_byte *myaddr)
{
int optimized;
int unavailable;
return !optimized && !unavailable;
}
-int
-get_frame_register_bytes (struct frame_info *frame, int regnum,
+bool
+get_frame_register_bytes (frame_info *frame, int regnum,
CORE_ADDR offset, int len, gdb_byte *myaddr,
int *optimizedp, int *unavailablep)
{
frame_register (frame, regnum, optimizedp, unavailablep,
&lval, &addr, &realnum, myaddr);
if (*optimizedp || *unavailablep)
- return 0;
+ return false;
}
else
{
if (*optimizedp || *unavailablep)
{
release_value (value);
- return 0;
+ return false;
}
+
memcpy (myaddr, value_contents_all (value) + offset, curr_len);
release_value (value);
}
*optimizedp = 0;
*unavailablep = 0;
- return 1;
+
+ return true;
}
void
(the unwound PC is the same as the pc), so make it so. */
frame->next = frame;
/* The sentinel frame has a special ID. */
- frame->this_id.p = 1;
+ frame->this_id.p = frame_id_status::COMPUTED;
frame->this_id.value = sentinel_frame_id;
if (frame_debug)
{
static struct frame_info *selected_frame;
-int
-has_stack_frames (void)
+bool
+has_stack_frames ()
{
if (!target_has_registers || !target_has_stack || !target_has_memory)
- return 0;
+ return false;
/* Traceframes are effectively a substitute for the live inferior. */
if (get_traceframe_number () < 0)
{
/* No current inferior, no frame. */
if (inferior_ptid == null_ptid)
- return 0;
+ return false;
thread_info *tp = inferior_thread ();
/* Don't try to read from a dead thread. */
if (tp->state == THREAD_EXITED)
- return 0;
+ return false;
/* ... or from a spinning thread. */
if (tp->executing)
- return 0;
+ return false;
}
- return 1;
+ return true;
}
/* Return the selected frame. Always non-NULL (unless there isn't an
based on the PC. */
frame_unwind_find_by_frame (fi, &fi->prologue_cache);
- fi->this_id.p = 1;
+ fi->this_id.p = frame_id_status::COMPUTED;
fi->this_id.value = frame_id_build (addr, pc);
if (frame_debug)
{
struct frame_info *fi;
+ ++frame_cache_generation;
+
/* Tear down all frame caches. */
for (fi = sentinel_frame; fi != NULL; fi = fi->prev)
{
if (prev_frame->level == 0)
return prev_frame;
+ unsigned int entry_generation = get_frame_cache_generation ();
+
try
{
compute_frame_id (prev_frame);
}
catch (const gdb_exception &ex)
{
- prev_frame->next = NULL;
- this_frame->prev = NULL;
+ if (get_frame_cache_generation () == entry_generation)
+ {
+ prev_frame->next = NULL;
+ this_frame->prev = NULL;
+ }
throw;
}
if (this_frame->unwind == NULL)
frame_unwind_find_by_frame (this_frame, &this_frame->prologue_cache);
- this_frame->prev_p = 1;
+ this_frame->prev_p = true;
this_frame->stop_reason = UNWIND_NO_REASON;
/* If we are unwinding from an inline frame, all of the below tests
this_pc_in_block = get_frame_address_in_block (this_frame);
morestack_msym = lookup_minimal_symbol_by_pc (this_pc_in_block).minsym;
if (morestack_msym)
- morestack_name = MSYMBOL_LINKAGE_NAME (morestack_msym);
+ morestack_name = morestack_msym->linkage_name ();
if (!morestack_name || strcmp (morestack_name, "__morestack") != 0)
{
if (frame_debug)
/* Is this (non-sentinel) frame in the "main"() function? */
-static int
-inside_main_func (struct frame_info *this_frame)
+static bool
+inside_main_func (frame_info *this_frame)
{
- struct bound_minimal_symbol msymbol;
- CORE_ADDR maddr;
+ if (symfile_objfile == nullptr)
+ return false;
+
+ bound_minimal_symbol msymbol
+ = lookup_minimal_symbol (main_name (), NULL, symfile_objfile);
+ if (msymbol.minsym == nullptr)
+ return false;
- if (symfile_objfile == 0)
- return 0;
- msymbol = lookup_minimal_symbol (main_name (), NULL, symfile_objfile);
- if (msymbol.minsym == NULL)
- return 0;
/* Make certain that the code, and not descriptor, address is
returned. */
- maddr = gdbarch_convert_from_func_ptr_addr (get_frame_arch (this_frame),
- BMSYMBOL_VALUE_ADDRESS (msymbol),
- current_top_target ());
+ CORE_ADDR maddr
+ = gdbarch_convert_from_func_ptr_addr (get_frame_arch (this_frame),
+ BMSYMBOL_VALUE_ADDRESS (msymbol),
+ current_top_target ());
+
return maddr == get_frame_func (this_frame);
}
/* Test whether THIS_FRAME is inside the process entry point function. */
-static int
-inside_entry_func (struct frame_info *this_frame)
+static bool
+inside_entry_func (frame_info *this_frame)
{
CORE_ADDR entry_point;
if (!entry_point_address_query (&entry_point))
- return 0;
+ return false;
return get_frame_func (this_frame) == entry_point;
}
return frame_unwind_pc (frame->next);
}
-int
-get_frame_pc_if_available (struct frame_info *frame, CORE_ADDR *pc)
+bool
+get_frame_pc_if_available (frame_info *frame, CORE_ADDR *pc)
{
gdb_assert (frame->next != NULL);
catch (const gdb_exception_error &ex)
{
if (ex.error == NOT_AVAILABLE_ERROR)
- return 0;
+ return false;
else
throw;
}
- return 1;
+ return true;
}
/* Return an address that falls within THIS_FRAME's code block. */
return pc;
}
-int
-get_frame_address_in_block_if_available (struct frame_info *this_frame,
+bool
+get_frame_address_in_block_if_available (frame_info *this_frame,
CORE_ADDR *pc)
{
catch (const gdb_exception_error &ex)
{
if (ex.error == NOT_AVAILABLE_ERROR)
- return 0;
+ return false;
throw;
}
- return 1;
+ return true;
}
symtab_and_line
int notcurrent;
CORE_ADDR pc;
- /* If the next frame represents an inlined function call, this frame's
- sal is the "call site" of that inlined function, which can not
- be inferred from get_frame_pc. */
- next_frame = get_next_frame (frame);
if (frame_inlined_callees (frame) > 0)
{
struct symbol *sym;
+ /* If the current frame has some inlined callees, and we have a next
+ frame, then that frame must be an inlined frame. In this case
+ this frame's sal is the "call site" of the next frame's inlined
+ function, which can not be inferred from get_frame_pc. */
+ next_frame = get_next_frame (frame);
if (next_frame)
sym = get_frame_function (next_frame);
else
/* Return true if the frame unwinder for frame FI is UNWINDER; false
otherwise. */
-int
-frame_unwinder_is (struct frame_info *fi, const struct frame_unwind *unwinder)
+bool
+frame_unwinder_is (frame_info *fi, const frame_unwind *unwinder)
{
- if (fi->unwind == NULL)
+ if (fi->unwind == nullptr)
frame_unwind_find_by_frame (fi, &fi->prologue_cache);
+
return fi->unwind == unwinder;
}
return read_memory_unsigned_integer (addr, len, byte_order);
}
-int
+bool
safe_frame_unwind_memory (struct frame_info *this_frame,
CORE_ADDR addr, gdb_byte *buf, int len)
{
/* NOTE: target_read_memory returns zero on success! */
- return !target_read_memory (addr, buf, len);
+ return target_read_memory (addr, buf, len) == 0;
}
/* Architecture methods. */
arch = get_frame_arch (next_frame);
next_frame->prev_arch.arch = arch;
- next_frame->prev_arch.p = 1;
+ next_frame->prev_arch.p = true;
if (frame_debug)
fprintf_unfiltered (gdb_stdlog,
"{ frame_unwind_arch (next_frame=%d) -> %s }\n",
get_frame_language (struct frame_info *frame)
{
CORE_ADDR pc = 0;
- int pc_p = 0;
+ bool pc_p = false;
gdb_assert (frame!= NULL);
try
{
pc = get_frame_address_in_block (frame);
- pc_p = 1;
+ pc_p = true;
}
catch (const gdb_exception_error &ex)
{
gdb_assert (!frame->prev_p);
/* The sniffer should not check the frame's ID; that's circular. */
- gdb_assert (!frame->this_id.p);
+ gdb_assert (frame->this_id.p != frame_id_status::COMPUTED);
/* Clear cached fields dependent on the unwinder.
The previous PC is independent of the unwinder, but the previous
function is not (see get_frame_address_in_block). */
- frame->prev_func.p = 0;
+ frame->prev_func.status = CC_UNKNOWN;
frame->prev_func.addr = 0;
/* Discard the unwinder last, so that we can easily find it if an assertion
static struct cmd_list_element *set_backtrace_cmdlist;
static struct cmd_list_element *show_backtrace_cmdlist;
-static void
-set_backtrace_cmd (const char *args, int from_tty)
-{
- help_list (set_backtrace_cmdlist, "set backtrace ", all_commands,
- gdb_stdout);
-}
-
-static void
-show_backtrace_cmd (const char *args, int from_tty)
-{
- cmd_show_list (show_backtrace_cmdlist, from_tty, "");
-}
-
/* Definition of the "set backtrace" settings that are exposed as
"backtrace" command options. */
},
};
+void _initialize_frame ();
void
-_initialize_frame (void)
+_initialize_frame ()
{
obstack_init (&frame_cache_obstack);
gdb::observers::target_changed.attach (frame_observer_target_changed);
- add_prefix_cmd ("backtrace", class_maintenance, set_backtrace_cmd, _("\
+ add_basic_prefix_cmd ("backtrace", class_maintenance, _("\
Set backtrace specific variables.\n\
Configure backtrace variables such as the backtrace limit"),
- &set_backtrace_cmdlist, "set backtrace ",
- 0/*allow-unknown*/, &setlist);
- add_prefix_cmd ("backtrace", class_maintenance, show_backtrace_cmd, _("\
+ &set_backtrace_cmdlist, "set backtrace ",
+ 0/*allow-unknown*/, &setlist);
+ add_show_prefix_cmd ("backtrace", class_maintenance, _("\
Show backtrace specific variables.\n\
Show backtrace variables such as the backtrace limit."),
- &show_backtrace_cmdlist, "show backtrace ",
- 0/*allow-unknown*/, &showlist);
+ &show_backtrace_cmdlist, "show backtrace ",
+ 0/*allow-unknown*/, &showlist);
add_setshow_uinteger_cmd ("limit", class_obscure,
&user_set_backtrace_options.backtrace_limit, _("\
projects / deliverable / binutils-gdb.git / blobdiff