From 88c3cd8dcb60606a25a16ea11149219db00f847b Mon Sep 17 00:00:00 2001 From: Pedro Alves Date: Thu, 21 Apr 2016 17:28:58 +0100 Subject: [PATCH] Switch gdb's TRY/CATCH to sjlj again We don't currently handle the case of gdb's readline callback throwing gdb C++ exceptions across a readline that wasn't built with -fexceptions. The end result is: (gdb) whatever-command-that-causes-an-error terminate called after throwing an instance of 'gdb_exception_RETURN_MASK_ERROR' Aborted $ Until that is fixed, revert back to sjlj-based exceptions again. gdb/ChangeLog: 2016-04-21 Pedro Alves * common/common-exceptions.h (GDB_XCPT_TRY): Add comment. (GDB_XCPT): Always define as GDB_XCPT_SJMP. --- gdb/ChangeLog | 5 +++++ gdb/common/common-exceptions.h | 11 +++++------ 2 files changed, 10 insertions(+), 6 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 6e09030..b6282e6 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,10 @@ 2016-04-21 Pedro Alves + * common/common-exceptions.h (GDB_XCPT_TRY): Add comment. + (GDB_XCPT): Always define as GDB_XCPT_SJMP. + +2016-04-21 Pedro Alves + * aix-thread.c (pdc_read_data, pdc_write_data): Add cast. (aix_thread_resume): Use PTRACE_TYPE_ARG5. * rs6000-nat.c (rs6000_ptrace64): Use PTRACE_TYPE_ARG5. diff --git a/gdb/common/common-exceptions.h b/gdb/common/common-exceptions.h index 6a41741..1ef3db3 100644 --- a/gdb/common/common-exceptions.h +++ b/gdb/common/common-exceptions.h @@ -122,7 +122,9 @@ struct gdb_exception the only mode supported when GDB is built as a C program. */ #define GDB_XCPT_SJMP 1 -/* Make GDB exceptions use try/catch behind the scenes. */ +/* Make GDB exceptions use try/catch behind the scenes. Can't be made + the default until we handle exceptions crossing foreign frames + (gdb -> readline callback -> gdb -> error). */ #define GDB_XCPT_TRY 2 /* Specify this mode to build with TRY/CATCH mapped directly to raw @@ -131,11 +133,8 @@ struct gdb_exception spurious code between the TRY and the CATCH block. */ #define GDB_XCPT_RAW_TRY 3 -#ifdef __cplusplus -# define GDB_XCPT GDB_XCPT_TRY -#else -# define GDB_XCPT GDB_XCPT_SJMP -#endif +/* Always use setjmp/longmp, even in C++ mode. */ +#define GDB_XCPT GDB_XCPT_SJMP /* Functions to drive the exceptions state machine. Though declared here by necessity, these functions should be considered internal to -- 2.7.4