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96e3f4e3c3
During my audit of the use of gdb_exception with regard to QUIT
processing, I found a try/catch in the scoped_switch_fork_info
destructor.
Static analysis found this call path from the destructor to
maybe_quit():
scoped_switch_fork_info::~scoped_switch_fork_info()
-> remove_breakpoints()
-> remove_breakpoint(bp_location*)
-> remove_breakpoint_1(bp_location*, remove_bp_reason)
-> memory_validate_breakpoint(gdbarch*, bp_target_info*)
-> target_read_memory(unsigned long, unsigned char*, long)
-> target_read(target_ops*, target_object, char const*, unsigned char*, unsigned long, long)
-> maybe_quit()
Since it's not safe to do a 'throw' from a destructor, we simply
call set_quit_flag and, for gdb_exception_forced_quit, also
set sync_quit_force_run. This will cause the appropriate
exception to be rethrown at the next QUIT check.
Another case is the try / catch in tui_getc() in tui-io.c. The
existing catch swallows the exception. I've added a catch for
'gdb_exception_forced_quit', which also swallows the exception,
but also sets sync_quit_force_run and calls set_quit_flag in
order to restart forced quit processing at the next QUIT check.
This is required because it isn't safe to throw into/through
readline.
Thanks to Pedro Alves for suggesting this idea.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=26761
Tested-by: Tom de Vries <tdevries@suse.de>
Approved-By: Pedro Alves <pedro@palves.net>
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| .. | ||
| ChangeLog-1998-2003 | ||
| tui-command.c | ||
| tui-command.h | ||
| tui-data.c | ||
| tui-data.h | ||
| tui-disasm.c | ||
| tui-disasm.h | ||
| tui-file.c | ||
| tui-file.h | ||
| tui-hooks.c | ||
| tui-hooks.h | ||
| tui-interp.c | ||
| tui-io.c | ||
| tui-io.h | ||
| tui-layout.c | ||
| tui-layout.h | ||
| tui-location.c | ||
| tui-location.h | ||
| tui-out.c | ||
| tui-out.h | ||
| tui-regs.c | ||
| tui-regs.h | ||
| tui-source.c | ||
| tui-source.h | ||
| tui-stack.c | ||
| tui-stack.h | ||
| tui-win.c | ||
| tui-win.h | ||
| tui-wingeneral.c | ||
| tui-wingeneral.h | ||
| tui-winsource.c | ||
| tui-winsource.h | ||
| tui.c | ||
| tui.h | ||