[PATCH 3/5] Avoid undefined behavior in Guile exception handling
Tom Tromey
tromey@adacore.com
Thu Apr 25 16:53:00 GMT 2019
The Guile code will longjmp (via scm_throw) when an object requiring
destruction is on the stack. This is undefined behavior.
This changes this code to run any destructors in inner scopes, and to
pass a POD to gdbscm_throw_gdb_exception.
gdb/ChangeLog
2019-04-25 Tom Tromey <tromey@adacore.com>
* guile/scm-exception.c (gdbscm_scm_from_gdb_exception)
(gdbscm_throw_gdb_exception): Take a gdbscm_gdb_exception.
* guile/scm-block.c, guile/scm-breakpoint.c, guile/scm-cmd.c,
guile/scm-disasm.c, guile/scm-frame.c, guile/scm-lazy-string.c,
guile/scm-math.c, guile/scm-param.c, guile/scm-ports.c,
guile/scm-symbol.c, guile/scm-symtab.c, guile/scm-type.c,
guile/scm-value.c: Use unpack.
* guile/guile-internal.h (gdbscm_scm_from_gdb_exception): Take a
gdbscm_gdb_exception.
(gdbscm_throw_gdb_exception): Likewise.
(struct gdbscm_gdb_exception): New.
(unpack): New function.
(gdbscm_wrap): Use unpack.
---
gdb/ChangeLog | 16 ++++++++
gdb/guile/guile-internal.h | 38 +++++++++++++++++--
gdb/guile/scm-block.c | 4 +-
gdb/guile/scm-breakpoint.c | 33 ++++++++++++-----
gdb/guile/scm-cmd.c | 4 +-
gdb/guile/scm-disasm.c | 4 +-
gdb/guile/scm-exception.c | 10 +++--
gdb/guile/scm-frame.c | 73 ++++++++++++++++++++++++++-----------
gdb/guile/scm-lazy-string.c | 2 +-
gdb/guile/scm-math.c | 2 +-
gdb/guile/scm-param.c | 8 ++--
gdb/guile/scm-ports.c | 4 +-
gdb/guile/scm-symbol.c | 20 ++++++----
gdb/guile/scm-symtab.c | 4 +-
gdb/guile/scm-type.c | 42 +++++++++++++++------
gdb/guile/scm-value.c | 53 +++++++++++++++++++--------
16 files changed, 235 insertions(+), 82 deletions(-)
diff --git a/gdb/guile/guile-internal.h b/gdb/guile/guile-internal.h
index a3e02abe41b..d316d1ce353 100644
--- a/gdb/guile/guile-internal.h
+++ b/gdb/guile/guile-internal.h
@@ -353,9 +353,11 @@ extern void gdbscm_misc_error (const char *subr, int arg_pos,
extern void gdbscm_throw (SCM exception) ATTRIBUTE_NORETURN;
-extern SCM gdbscm_scm_from_gdb_exception (struct gdb_exception exception);
+struct gdbscm_gdb_exception;
+extern SCM gdbscm_scm_from_gdb_exception
+ (const struct gdbscm_gdb_exception &exception);
-extern void gdbscm_throw_gdb_exception (struct gdb_exception exception)
+extern void gdbscm_throw_gdb_exception (struct gdbscm_gdb_exception exception)
ATTRIBUTE_NORETURN;
extern void gdbscm_print_exception_with_stack (SCM port, SCM stack,
@@ -650,6 +652,33 @@ extern void gdbscm_initialize_values (void);
with a TRY/CATCH, because the dtors won't otherwise be run when a
Guile exceptions is thrown. */
+/* This is a destructor-less clone of gdb_exception. */
+
+struct gdbscm_gdb_exception
+{
+ enum return_reason reason;
+ enum errors error;
+ /* The message is xmalloc'd. */
+ char *message;
+};
+
+/* Return a gdbscm_gdb_exception representing EXC. */
+
+inline struct gdbscm_gdb_exception
+unpack (const gdb_exception &exc)
+{
+ struct gdbscm_gdb_exception result;
+ result.reason = exc.reason;
+ result.error = exc.error;
+ if (exc.message == nullptr)
+ result.message = nullptr;
+ else
+ result.message = xstrdup (exc.message->c_str ());
+ /* The message should be NULL iff the reason is zero. */
+ gdb_assert ((result.reason == 0) == (result.message == nullptr));
+ return result;
+}
+
/* Use this after a TRY/CATCH to throw the appropriate Scheme
exception if a GDB error occurred. */
@@ -676,6 +705,7 @@ SCM
gdbscm_wrap (Function &&func, Args &&... args)
{
SCM result = SCM_BOOL_F;
+ struct gdbscm_gdb_exception exc {};
try
{
@@ -683,9 +713,11 @@ gdbscm_wrap (Function &&func, Args &&... args)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
+
if (gdbscm_is_exception (result))
gdbscm_throw (result);
diff --git a/gdb/guile/scm-block.c b/gdb/guile/scm-block.c
index 2114ca1f199..3a78465f9e2 100644
--- a/gdb/guile/scm-block.c
+++ b/gdb/guile/scm-block.c
@@ -680,6 +680,7 @@ gdbscm_lookup_block (SCM pc_scm)
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, NULL, "U", pc_scm, &pc);
+ struct gdbscm_gdb_exception exc {};
try
{
cust = find_pc_compunit_symtab (pc);
@@ -689,9 +690,10 @@ gdbscm_lookup_block (SCM pc_scm)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (cust == NULL || COMPUNIT_OBJFILE (cust) == NULL)
{
gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, pc_scm,
diff --git a/gdb/guile/scm-breakpoint.c b/gdb/guile/scm-breakpoint.c
index f86c26390c4..29ab859e07b 100644
--- a/gdb/guile/scm-breakpoint.c
+++ b/gdb/guile/scm-breakpoint.c
@@ -411,7 +411,7 @@ gdbscm_register_breakpoint_x (SCM self)
{
breakpoint_smob *bp_smob
= bpscm_get_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
- struct gdb_exception except;
+ struct gdbscm_gdb_exception except {};
const char *location, *copy;
/* We only support registering breakpoints created with make-breakpoint. */
@@ -467,7 +467,7 @@ gdbscm_register_breakpoint_x (SCM self)
}
catch (const gdb_exception &ex)
{
- except = ex;
+ except = unpack (ex);
}
/* Ensure this gets reset, even if there's an error. */
@@ -489,15 +489,17 @@ gdbscm_delete_breakpoint_x (SCM self)
breakpoint_smob *bp_smob
= bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
delete_breakpoint (bp_smob->bp);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return SCM_UNSPECIFIED;
}
@@ -586,6 +588,7 @@ gdbscm_set_breakpoint_enabled_x (SCM self, SCM newvalue)
SCM_ASSERT_TYPE (gdbscm_is_bool (newvalue), newvalue, SCM_ARG2, FUNC_NAME,
_("boolean"));
+ struct gdbscm_gdb_exception exc {};
try
{
if (gdbscm_is_true (newvalue))
@@ -595,9 +598,10 @@ gdbscm_set_breakpoint_enabled_x (SCM self, SCM newvalue)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return SCM_UNSPECIFIED;
}
@@ -623,15 +627,17 @@ gdbscm_set_breakpoint_silent_x (SCM self, SCM newvalue)
SCM_ASSERT_TYPE (gdbscm_is_bool (newvalue), newvalue, SCM_ARG2, FUNC_NAME,
_("boolean"));
+ struct gdbscm_gdb_exception exc {};
try
{
breakpoint_set_silent (bp_smob->bp, gdbscm_is_true (newvalue));
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return SCM_UNSPECIFIED;
}
@@ -663,15 +669,17 @@ gdbscm_set_breakpoint_ignore_count_x (SCM self, SCM newvalue)
if (value < 0)
value = 0;
+ struct gdbscm_gdb_exception exc {};
try
{
set_ignore_count (bp_smob->number, (int) value, 0);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return SCM_UNSPECIFIED;
}
@@ -783,15 +791,17 @@ gdbscm_set_breakpoint_task_x (SCM self, SCM newvalue)
{
id = scm_to_long (newvalue);
+ struct gdbscm_gdb_exception exc {};
try
{
valid_id = valid_task_id (id);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (! valid_id)
{
gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
@@ -803,15 +813,17 @@ gdbscm_set_breakpoint_task_x (SCM self, SCM newvalue)
else
SCM_ASSERT_TYPE (0, newvalue, SCM_ARG2, FUNC_NAME, _("integer or #f"));
+ struct gdbscm_gdb_exception exc {};
try
{
breakpoint_set_task (bp_smob->bp, id);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return SCM_UNSPECIFIED;
}
@@ -968,17 +980,18 @@ gdbscm_breakpoint_commands (SCM self)
string_file buf;
current_uiout->redirect (&buf);
+ struct gdbscm_gdb_exception exc {};
try
{
print_command_lines (current_uiout, breakpoint_commands (bp), 0);
}
catch (const gdb_exception &except)
{
- current_uiout->redirect (NULL);
- gdbscm_throw_gdb_exception (except);
+ exc = unpack (except);
}
current_uiout->redirect (NULL);
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
result = gdbscm_scm_from_c_string (buf.c_str ());
return result;
diff --git a/gdb/guile/scm-cmd.c b/gdb/guile/scm-cmd.c
index 38db7f5c71f..0a9cd44a17a 100644
--- a/gdb/guile/scm-cmd.c
+++ b/gdb/guile/scm-cmd.c
@@ -758,6 +758,7 @@ gdbscm_register_command_x (SCM self)
c_smob->cmd_name = gdbscm_gc_xstrdup (cmd_name);
xfree (cmd_name);
+ struct gdbscm_gdb_exception exc {};
try
{
if (c_smob->is_prefix)
@@ -778,8 +779,9 @@ gdbscm_register_command_x (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
/* Note: At this point the command exists in gdb.
So no more errors after this point. */
diff --git a/gdb/guile/scm-disasm.c b/gdb/guile/scm-disasm.c
index d673a1eb90a..86129773931 100644
--- a/gdb/guile/scm-disasm.c
+++ b/gdb/guile/scm-disasm.c
@@ -247,6 +247,7 @@ gdbscm_arch_disassemble (SCM self, SCM start_scm, SCM rest)
int insn_len = 0;
string_file buf;
+ struct gdbscm_gdb_exception exc {};
try
{
if (using_port)
@@ -259,9 +260,10 @@ gdbscm_arch_disassemble (SCM self, SCM start_scm, SCM rest)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
result = scm_cons (dascm_make_insn (pc, buf.c_str (), insn_len),
result);
diff --git a/gdb/guile/scm-exception.c b/gdb/guile/scm-exception.c
index 44cd7b35750..be24b8ac9d0 100644
--- a/gdb/guile/scm-exception.c
+++ b/gdb/guile/scm-exception.c
@@ -428,7 +428,7 @@ gdbscm_throw (SCM exception)
/* Convert a GDB exception to a <gdb:exception> object. */
SCM
-gdbscm_scm_from_gdb_exception (struct gdb_exception exception)
+gdbscm_scm_from_gdb_exception (const struct gdbscm_gdb_exception &exception)
{
SCM key;
@@ -446,7 +446,7 @@ gdbscm_scm_from_gdb_exception (struct gdb_exception exception)
return gdbscm_make_error (key, NULL, "~A",
scm_list_1 (gdbscm_scm_from_c_string
- (exception.what ())),
+ (exception.message)),
SCM_BOOL_F);
}
@@ -454,9 +454,11 @@ gdbscm_scm_from_gdb_exception (struct gdb_exception exception)
This function does not return. */
void
-gdbscm_throw_gdb_exception (struct gdb_exception exception)
+gdbscm_throw_gdb_exception (struct gdbscm_gdb_exception exception)
{
- gdbscm_throw (gdbscm_scm_from_gdb_exception (exception));
+ SCM scm_exception = gdbscm_scm_from_gdb_exception (exception);
+ xfree (exception.message);
+ gdbscm_throw (scm_exception);
}
/* Print the error message portion of an exception.
diff --git a/gdb/guile/scm-frame.c b/gdb/guile/scm-frame.c
index f3795f83f72..fc7c7bff32a 100644
--- a/gdb/guile/scm-frame.c
+++ b/gdb/guile/scm-frame.c
@@ -250,7 +250,7 @@ frscm_scm_from_frame (struct frame_info *frame, struct inferior *inferior)
}
catch (const gdb_exception &except)
{
- return gdbscm_scm_from_gdb_exception (except);
+ return gdbscm_scm_from_gdb_exception (unpack (except));
}
f_scm = frscm_make_frame_smob ();
@@ -396,15 +396,17 @@ gdbscm_frame_valid_p (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return scm_from_bool (frame != NULL);
}
@@ -423,6 +425,7 @@ gdbscm_frame_name (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
@@ -431,9 +434,10 @@ gdbscm_frame_name (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -460,6 +464,7 @@ gdbscm_frame_type (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
@@ -468,9 +473,10 @@ gdbscm_frame_type (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -491,15 +497,17 @@ gdbscm_frame_arch (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -521,15 +529,17 @@ gdbscm_frame_unwind_stop_reason (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -553,6 +563,7 @@ gdbscm_frame_pc (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
@@ -561,9 +572,10 @@ gdbscm_frame_pc (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -585,6 +597,7 @@ gdbscm_frame_block (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
@@ -593,9 +606,10 @@ gdbscm_frame_block (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -635,6 +649,7 @@ gdbscm_frame_function (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
@@ -643,9 +658,10 @@ gdbscm_frame_function (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -671,6 +687,7 @@ gdbscm_frame_older (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
@@ -679,9 +696,10 @@ gdbscm_frame_older (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -707,6 +725,7 @@ gdbscm_frame_newer (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
@@ -715,9 +734,10 @@ gdbscm_frame_newer (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -742,6 +762,7 @@ gdbscm_frame_sal (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
@@ -750,9 +771,10 @@ gdbscm_frame_sal (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -777,7 +799,7 @@ gdbscm_frame_read_register (SCM self, SCM register_scm)
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, NULL, "s",
register_scm, ®ister_str);
- struct gdb_exception except;
+ struct gdbscm_gdb_exception except {};
try
{
@@ -795,7 +817,7 @@ gdbscm_frame_read_register (SCM self, SCM register_scm)
}
catch (const gdb_exception &ex)
{
- except = ex;
+ except = unpack (ex);
}
xfree (register_str);
@@ -838,15 +860,17 @@ gdbscm_frame_read_var (SCM self, SCM symbol_scm, SCM rest)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -864,7 +888,7 @@ gdbscm_frame_read_var (SCM self, SCM symbol_scm, SCM rest)
}
else if (scm_is_string (symbol_scm))
{
- struct gdb_exception except;
+ struct gdbscm_gdb_exception except {};
if (! SCM_UNBNDP (block_scm))
{
@@ -896,7 +920,7 @@ gdbscm_frame_read_var (SCM self, SCM symbol_scm, SCM rest)
}
catch (const gdb_exception &ex)
{
- except = ex;
+ except = unpack (ex);
}
}
@@ -919,9 +943,10 @@ gdbscm_frame_read_var (SCM self, SCM symbol_scm, SCM rest)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return vlscm_scm_from_value (value);
}
@@ -936,6 +961,7 @@ gdbscm_frame_select (SCM self)
f_smob = frscm_get_frame_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
+ struct gdbscm_gdb_exception exc {};
try
{
frame = frscm_frame_smob_to_frame (f_smob);
@@ -944,9 +970,10 @@ gdbscm_frame_select (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (frame == NULL)
{
gdbscm_invalid_object_error (FUNC_NAME, SCM_ARG1, self,
@@ -964,15 +991,17 @@ gdbscm_newest_frame (void)
{
struct frame_info *frame = NULL;
+ struct gdbscm_gdb_exception exc {};
try
{
frame = get_current_frame ();
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return frscm_scm_from_frame_unsafe (frame, current_inferior ());
}
@@ -984,15 +1013,17 @@ gdbscm_selected_frame (void)
{
struct frame_info *frame = NULL;
+ struct gdbscm_gdb_exception exc {};
try
{
frame = get_selected_frame (_("No frame is currently selected"));
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return frscm_scm_from_frame_unsafe (frame, current_inferior ());
}
diff --git a/gdb/guile/scm-lazy-string.c b/gdb/guile/scm-lazy-string.c
index 4d69b234bb2..b0bbc827c8f 100644
--- a/gdb/guile/scm-lazy-string.c
+++ b/gdb/guile/scm-lazy-string.c
@@ -338,7 +338,7 @@ lsscm_safe_lazy_string_to_value (SCM string, int arg_pos,
}
catch (const gdb_exception &except)
{
- *except_scmp = gdbscm_scm_from_gdb_exception (except);
+ *except_scmp = gdbscm_scm_from_gdb_exception (unpack (except));
return NULL;
}
diff --git a/gdb/guile/scm-math.c b/gdb/guile/scm-math.c
index dc7245ba7b4..35ad4aa6035 100644
--- a/gdb/guile/scm-math.c
+++ b/gdb/guile/scm-math.c
@@ -826,7 +826,7 @@ vlscm_convert_typed_value_from_scheme (const char *func_name,
}
catch (const gdb_exception &except)
{
- except_scm = gdbscm_scm_from_gdb_exception (except);
+ except_scm = gdbscm_scm_from_gdb_exception (unpack (except));
}
if (gdbscm_is_true (except_scm))
diff --git a/gdb/guile/scm-param.c b/gdb/guile/scm-param.c
index cc10806d97e..eb5472db6bb 100644
--- a/gdb/guile/scm-param.c
+++ b/gdb/guile/scm-param.c
@@ -1006,6 +1006,7 @@ gdbscm_register_parameter_x (SCM self)
_("parameter exists, \"show\" command is already defined"));
}
+ struct gdbscm_gdb_exception exc {};
try
{
add_setshow_generic (p_smob->type, p_smob->cmd_class,
@@ -1020,9 +1021,10 @@ gdbscm_register_parameter_x (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
/* Note: At this point the parameter exists in gdb.
So no more errors after this point. */
@@ -1056,7 +1058,7 @@ gdbscm_parameter_value (SCM self)
struct cmd_list_element *alias, *prefix, *cmd;
char *newarg;
int found = -1;
- struct gdb_exception except;
+ struct gdbscm_gdb_exception except {};
gdb::unique_xmalloc_ptr<char> name
= gdbscm_scm_to_host_string (self, NULL, &except_scm);
@@ -1069,7 +1071,7 @@ gdbscm_parameter_value (SCM self)
}
catch (const gdb_exception &ex)
{
- except = ex;
+ except = unpack (ex);
}
xfree (newarg);
diff --git a/gdb/guile/scm-ports.c b/gdb/guile/scm-ports.c
index 57d3b18f962..c388a7769ec 100644
--- a/gdb/guile/scm-ports.c
+++ b/gdb/guile/scm-ports.c
@@ -272,6 +272,7 @@ ioscm_write (SCM port, const void *data, size_t size)
if (scm_is_eq (port, input_port_scm))
return;
+ struct gdbscm_gdb_exception exc {};
try
{
if (scm_is_eq (port, error_port_scm))
@@ -281,8 +282,9 @@ ioscm_write (SCM port, const void *data, size_t size)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
}
/* Flush gdb's stdout or stderr. */
diff --git a/gdb/guile/scm-symbol.c b/gdb/guile/scm-symbol.c
index ab39123dff0..0cd6418b14b 100644
--- a/gdb/guile/scm-symbol.c
+++ b/gdb/guile/scm-symbol.c
@@ -486,15 +486,17 @@ gdbscm_symbol_needs_frame_p (SCM self)
struct symbol *symbol = s_smob->symbol;
int result = 0;
+ struct gdbscm_gdb_exception exc {};
try
{
result = symbol_read_needs_frame (symbol);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return scm_from_bool (result);
}
@@ -538,6 +540,7 @@ gdbscm_symbol_value (SCM self, SCM rest)
_("cannot get the value of a typedef"));
}
+ struct gdbscm_gdb_exception exc {};
try
{
if (f_smob != NULL)
@@ -558,9 +561,10 @@ gdbscm_symbol_value (SCM self, SCM rest)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return vlscm_scm_from_value (value);
}
@@ -602,6 +606,7 @@ gdbscm_lookup_symbol (SCM name_scm, SCM rest)
{
struct frame_info *selected_frame;
+ struct gdbscm_gdb_exception exc {};
try
{
selected_frame = get_selected_frame (_("no frame selected"));
@@ -610,11 +615,12 @@ gdbscm_lookup_symbol (SCM name_scm, SCM rest)
catch (const gdb_exception &ex)
{
xfree (name);
- GDBSCM_HANDLE_GDB_EXCEPTION (ex);
+ exc = unpack (ex);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
}
- struct gdb_exception except;
+ struct gdbscm_gdb_exception except {};
try
{
symbol = lookup_symbol (name, block, (domain_enum) domain,
@@ -622,7 +628,7 @@ gdbscm_lookup_symbol (SCM name_scm, SCM rest)
}
catch (const gdb_exception &ex)
{
- except = ex;
+ except = unpack (ex);
}
xfree (name);
@@ -646,7 +652,7 @@ gdbscm_lookup_global_symbol (SCM name_scm, SCM rest)
int domain_arg_pos = -1;
int domain = VAR_DOMAIN;
struct symbol *symbol = NULL;
- struct gdb_exception except;
+ struct gdbscm_gdb_exception except {};
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#i",
name_scm, &name, rest,
@@ -658,7 +664,7 @@ gdbscm_lookup_global_symbol (SCM name_scm, SCM rest)
}
catch (const gdb_exception &ex)
{
- except = ex;
+ except = unpack (ex);
}
xfree (name);
diff --git a/gdb/guile/scm-symtab.c b/gdb/guile/scm-symtab.c
index 60ed7072556..0be09ab66c2 100644
--- a/gdb/guile/scm-symtab.c
+++ b/gdb/guile/scm-symtab.c
@@ -591,6 +591,7 @@ gdbscm_find_pc_line (SCM pc_scm)
gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, NULL, "U", pc_scm, &pc_ull);
+ struct gdbscm_gdb_exception exc {};
try
{
CORE_ADDR pc = (CORE_ADDR) pc_ull;
@@ -599,9 +600,10 @@ gdbscm_find_pc_line (SCM pc_scm)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return stscm_scm_from_sal (sal);
}
diff --git a/gdb/guile/scm-type.c b/gdb/guile/scm-type.c
index 8f47ef68cc1..d326044d1e9 100644
--- a/gdb/guile/scm-type.c
+++ b/gdb/guile/scm-type.c
@@ -105,6 +105,7 @@ tyscm_type_smob_type (type_smob *t_smob)
static std::string
tyscm_type_name (struct type *type)
{
+ SCM excp;
try
{
string_file stb;
@@ -114,11 +115,10 @@ tyscm_type_name (struct type *type)
}
catch (const gdb_exception &except)
{
- SCM excp = gdbscm_scm_from_gdb_exception (except);
- gdbscm_throw (excp);
+ excp = gdbscm_scm_from_gdb_exception (unpack (except));
}
- gdb_assert_not_reached ("no way to get here");
+ gdbscm_throw (excp);
}
/* Administrivia for type smobs. */
@@ -234,15 +234,17 @@ tyscm_equal_p_type_smob (SCM type1_scm, SCM type2_scm)
type1 = type1_smob->type;
type2 = type2_smob->type;
+ struct gdbscm_gdb_exception exc {};
try
{
result = types_deeply_equal (type1, type2);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return scm_from_bool (result);
}
@@ -650,15 +652,17 @@ gdbscm_type_strip_typedefs (SCM self)
= tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
struct type *type = t_smob->type;
+ struct gdbscm_gdb_exception exc {};
try
{
type = check_typedef (type);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return tyscm_scm_from_type (type);
}
@@ -671,15 +675,17 @@ tyscm_get_composite (struct type *type)
for (;;)
{
+ struct gdbscm_gdb_exception exc {};
try
{
type = check_typedef (type);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (TYPE_CODE (type) != TYPE_CODE_PTR
&& TYPE_CODE (type) != TYPE_CODE_REF)
break;
@@ -725,6 +731,7 @@ tyscm_array_1 (SCM self, SCM n1_scm, SCM n2_scm, int is_vector,
_("Array length must not be negative"));
}
+ struct gdbscm_gdb_exception exc {};
try
{
array = lookup_array_range_type (type, n1, n2);
@@ -733,9 +740,10 @@ tyscm_array_1 (SCM self, SCM n1_scm, SCM n2_scm, int is_vector,
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return tyscm_scm_from_type (array);
}
@@ -781,15 +789,17 @@ gdbscm_type_pointer (SCM self)
= tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
struct type *type = t_smob->type;
+ struct gdbscm_gdb_exception exc {};
try
{
type = lookup_pointer_type (type);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return tyscm_scm_from_type (type);
}
@@ -842,15 +852,17 @@ gdbscm_type_reference (SCM self)
= tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
struct type *type = t_smob->type;
+ struct gdbscm_gdb_exception exc {};
try
{
type = lookup_lvalue_reference_type (type);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return tyscm_scm_from_type (type);
}
@@ -879,15 +891,17 @@ gdbscm_type_const (SCM self)
= tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
struct type *type = t_smob->type;
+ struct gdbscm_gdb_exception exc {};
try
{
type = make_cv_type (1, 0, type, NULL);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return tyscm_scm_from_type (type);
}
@@ -901,15 +915,17 @@ gdbscm_type_volatile (SCM self)
= tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
struct type *type = t_smob->type;
+ struct gdbscm_gdb_exception exc {};
try
{
type = make_cv_type (0, 1, type, NULL);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return tyscm_scm_from_type (type);
}
@@ -923,15 +939,17 @@ gdbscm_type_unqualified (SCM self)
= tyscm_get_type_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
struct type *type = t_smob->type;
+ struct gdbscm_gdb_exception exc {};
try
{
type = make_cv_type (0, 0, type, NULL);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return tyscm_scm_from_type (type);
}
diff --git a/gdb/guile/scm-value.c b/gdb/guile/scm-value.c
index 00d1c182e72..70e13a8ec52 100644
--- a/gdb/guile/scm-value.c
+++ b/gdb/guile/scm-value.c
@@ -156,6 +156,7 @@ vlscm_print_value_smob (SCM self, SCM port, scm_print_state *pstate)
instead of writingp. */
opts.raw = !!pstate->writingp;
+ struct gdbscm_gdb_exception exc {};
try
{
string_file stb;
@@ -165,9 +166,10 @@ vlscm_print_value_smob (SCM self, SCM port, scm_print_state *pstate)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (pstate->writingp)
scm_puts (">", port);
@@ -186,15 +188,17 @@ vlscm_equal_p_value_smob (SCM v1, SCM v2)
const value_smob *v2_smob = (value_smob *) SCM_SMOB_DATA (v2);
int result = 0;
+ struct gdbscm_gdb_exception exc {};
try
{
result = value_equal (v1_smob->value, v2_smob->value);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return scm_from_bool (result);
}
@@ -493,6 +497,7 @@ gdbscm_value_dynamic_type (SCM self)
if (! SCM_UNBNDP (v_smob->dynamic_type))
return v_smob->dynamic_type;
+ struct gdbscm_gdb_exception exc {};
try
{
scoped_value_mark free_values;
@@ -531,9 +536,10 @@ gdbscm_value_dynamic_type (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (type == NULL)
v_smob->dynamic_type = gdbscm_value_type (self);
else
@@ -680,15 +686,17 @@ gdbscm_value_call (SCM self, SCM args)
long args_count;
struct value **vargs = NULL;
+ struct gdbscm_gdb_exception exc {};
try
{
ftype = check_typedef (value_type (function));
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
SCM_ASSERT_TYPE (TYPE_CODE (ftype) == TYPE_CODE_FUNC, self,
SCM_ARG1, FUNC_NAME,
_("function (value of TYPE_CODE_FUNC)"));
@@ -746,6 +754,7 @@ gdbscm_value_to_bytevector (SCM self)
type = value_type (value);
+ struct gdbscm_gdb_exception exc {};
try
{
type = check_typedef (type);
@@ -754,9 +763,10 @@ gdbscm_value_to_bytevector (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
bv = scm_c_make_bytevector (length);
memcpy (SCM_BYTEVECTOR_CONTENTS (bv), contents, length);
@@ -789,15 +799,17 @@ gdbscm_value_to_bool (SCM self)
type = value_type (value);
+ struct gdbscm_gdb_exception exc {};
try
{
type = check_typedef (type);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
SCM_ASSERT_TYPE (is_intlike (type, 1), self, SCM_ARG1, FUNC_NAME,
_("integer-like gdb value"));
@@ -810,9 +822,10 @@ gdbscm_value_to_bool (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
return scm_from_bool (l != 0);
}
@@ -830,15 +843,17 @@ gdbscm_value_to_integer (SCM self)
type = value_type (value);
+ struct gdbscm_gdb_exception exc {};
try
{
type = check_typedef (type);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
SCM_ASSERT_TYPE (is_intlike (type, 1), self, SCM_ARG1, FUNC_NAME,
_("integer-like gdb value"));
@@ -851,9 +866,10 @@ gdbscm_value_to_integer (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
if (TYPE_UNSIGNED (type))
return gdbscm_scm_from_ulongest (l);
else
@@ -875,15 +891,17 @@ gdbscm_value_to_real (SCM self)
type = value_type (value);
+ struct gdbscm_gdb_exception exc {};
try
{
type = check_typedef (type);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
SCM_ASSERT_TYPE (is_intlike (type, 0) || TYPE_CODE (type) == TYPE_CODE_FLT,
self, SCM_ARG1, FUNC_NAME, _("number"));
@@ -907,9 +925,10 @@ gdbscm_value_to_real (SCM self)
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
/* TODO: Is there a better way to check if the value fits? */
if (!value_equal (value, check))
gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self,
@@ -992,6 +1011,7 @@ gdbscm_value_to_string (SCM self, SCM rest)
/* We don't assume anything about the result of scm_port_conversion_strategy.
From this point on, if errors is not 'errors, use 'substitute. */
+ struct gdbscm_gdb_exception exc {};
try
{
gdb::unique_xmalloc_ptr<gdb_byte> buffer;
@@ -1001,8 +1021,9 @@ gdbscm_value_to_string (SCM self, SCM rest)
catch (const gdb_exception &except)
{
xfree (encoding);
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
/* If errors is "error", scm_from_stringn may throw a Scheme exception.
Make sure we don't leak. This is done via scm_dynwind_begin, et.al. */
@@ -1048,7 +1069,7 @@ gdbscm_value_to_lazy_string (SCM self, SCM rest)
char *encoding = NULL;
int length = -1;
SCM result = SCM_BOOL_F; /* -Wall */
- struct gdb_exception except;
+ struct gdbscm_gdb_exception except {};
/* The sequencing here, as everywhere else, is important.
We can't have existing cleanups when a Scheme exception is thrown. */
@@ -1121,7 +1142,7 @@ gdbscm_value_to_lazy_string (SCM self, SCM rest)
}
catch (const gdb_exception &ex)
{
- except = ex;
+ except = unpack (ex);
}
xfree (encoding);
@@ -1177,15 +1198,17 @@ gdbscm_value_print (SCM self)
string_file stb;
+ struct gdbscm_gdb_exception exc {};
try
{
common_val_print (value, &stb, 0, &opts, current_language);
}
catch (const gdb_exception &except)
{
- GDBSCM_HANDLE_GDB_EXCEPTION (except);
+ exc = unpack (except);
}
+ GDBSCM_HANDLE_GDB_EXCEPTION (exc);
/* Use SCM_FAILED_CONVERSION_QUESTION_MARK to ensure this doesn't
throw an error if the encoding fails.
IWBN to use scm_take_locale_string here, but we'd have to temporarily
--
2.20.1
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