From 37f54063ed0daaffbd52f69efbdb4c8e0a9c9cca Mon Sep 17 00:00:00 2001 From: Bruno Larsen Date: Mon, 2 Jan 2023 14:35:50 +0100 Subject: gdb/mi: add no-history stop reason When executing in reverse and runs out of recorded history, GDB prints a warning to the user, but does not add a reason in the stopped record, for example: *stopped,frame={addr="0x000000000040113e",func="main",args=[],file="/home/blarsen/Documents/fsf_build/gdb/testsuite/../../../binutils-gdb/gdb/testsuite/gdb.reverse/solib-reverse.c",fullname="/home/blarsen/Documents/binutils-gdb/gdb/testsuite/gdb.reverse/solib-reverse.c",line="27",arch="i386:x86-64"},thread-id="1",stopped-threads="all",core="1" This problem was reported as record/29260. This commit adds the reason no-history to the record, making it easier for interfaces using the mi interpreter to report the result. It also changes the test gdb.mi/mi-reverse.exp to test that the reason shows up correctly. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29260 --- gdb/NEWS | 5 +++++ gdb/doc/gdb.texinfo | 2 ++ gdb/infrun.c | 5 ++++- gdb/mi/mi-common.c | 1 + gdb/mi/mi-common.h | 1 + gdb/testsuite/gdb.mi/mi-reverse.exp | 2 +- 6 files changed, 14 insertions(+), 2 deletions(-) diff --git a/gdb/NEWS b/gdb/NEWS index d8f4f396712..c0aac212e30 100644 --- a/gdb/NEWS +++ b/gdb/NEWS @@ -17,6 +17,11 @@ maintenance print record-instruction [ N ] prints how GDB would undo the N-th previous instruction, and if N is positive, it prints how GDB will redo the N-th following instruction. +* MI changes + +** mi now reports 'no-history' as a stop reason when hitting the end of the + reverse execution history. + *** Changes in GDB 13 * MI version 1 is deprecated, and will be removed in GDB 14. diff --git a/gdb/doc/gdb.texinfo b/gdb/doc/gdb.texinfo index dd8f8bc757c..2f5b4bb4c61 100644 --- a/gdb/doc/gdb.texinfo +++ b/gdb/doc/gdb.texinfo @@ -30860,6 +30860,8 @@ The inferior returned from a system call. This is reported when @item exec The inferior called @code{exec}. This is reported when @code{catch exec} (@pxref{Set Catchpoints}) has been used. +@item no-history +There isn't enough history recorded to continue reverse execution. @end table The @var{id} field identifies the global thread ID of the thread diff --git a/gdb/infrun.c b/gdb/infrun.c index d5f97e33625..181d961d80d 100644 --- a/gdb/infrun.c +++ b/gdb/infrun.c @@ -8406,7 +8406,10 @@ print_signal_received_reason (struct ui_out *uiout, enum gdb_signal siggnal) void print_no_history_reason (struct ui_out *uiout) { - uiout->text ("\nNo more reverse-execution history.\n"); + if (uiout->is_mi_like_p ()) + uiout->field_string ("reason", async_reason_lookup (EXEC_ASYNC_NO_HISTORY)); + else + uiout->text ("\nNo more reverse-execution history.\n"); } /* Print current location without a level number, if we have changed diff --git a/gdb/mi/mi-common.c b/gdb/mi/mi-common.c index 51a8aaa8d0e..ce70d11a912 100644 --- a/gdb/mi/mi-common.c +++ b/gdb/mi/mi-common.c @@ -39,6 +39,7 @@ static const char * const async_reason_string_lookup[] = "syscall-entry", "syscall-return", "exec", + "no-history", NULL }; diff --git a/gdb/mi/mi-common.h b/gdb/mi/mi-common.h index 6a1aea3539d..dfb83535b0b 100644 --- a/gdb/mi/mi-common.h +++ b/gdb/mi/mi-common.h @@ -42,6 +42,7 @@ enum async_reply_reason EXEC_ASYNC_SYSCALL_ENTRY, EXEC_ASYNC_SYSCALL_RETURN, EXEC_ASYNC_EXEC, + EXEC_ASYNC_NO_HISTORY, /* This is here only to represent the number of enums. */ EXEC_ASYNC_LAST }; diff --git a/gdb/testsuite/gdb.mi/mi-reverse.exp b/gdb/testsuite/gdb.mi/mi-reverse.exp index e761ede03f5..d631beb17c8 100644 --- a/gdb/testsuite/gdb.mi/mi-reverse.exp +++ b/gdb/testsuite/gdb.mi/mi-reverse.exp @@ -159,7 +159,7 @@ proc test_controlled_execution_reverse {} { "reverse-continue at callee3" mi_execute_to "exec-continue --reverse" \ - "" "main" "" \ + "no-history" "main" "" \ "basics.c" $line_main_body "" \ "reverse-continue at main" } -- cgit v1.2.1