https://llvm.org/bugs/show_bug.cgi?id=23248
Bug ID: 23248
Summary: "stopped" notification for the exec-finish GDB/MI
command gives the wrong reason
Product: lldb
Version: unspecified
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: lldb-dev@cs.uiuc.edu
Reporter: vadim.maca...@gmail.com
Classification: Unclassified
Created attachment 14209
--> https://llvm.org/bugs/attachment.cgi?id=14209&action=edit
Source for test executable
The -exec-finish MI command is used to step out of the current function (see
<https://sourceware.org/gdb/onlinedocs/gdb/GDB_002fMI-Program-Execution.html#GDB_002fMI-Program-Execution>).
When this command completes and execution stops GDB sends out:
*stopped,reason="function-finished"...
However the LLDB MI driver sends out:
*stopped,reason="end-stepping-range"...
Furthermore, GDB sends the return value of the function in the notification
(unless the function returns void) while the LLDB MI driver does not. Here's a
sample notification sent out when stepping out of a function that returns an
int.
GDB-MI:
*stopped,reason="function-finished",frame={addr="0x0000000000400828",func="printNextInt",args=[],file="../test/test_target.cpp",fullname="/media/sf_dbgmits/test/test_target.cpp",line="11"},gdb-result-var="$1",return-value="0",thread-id="1",stopped-threads="all",core="0"
LLDB-MI:
*stopped,reason="end-stepping-range",frame={addr="0x0000000000400828",func="printNextInt()",args=[],file="test_target.cpp",fullname="/media/sf_dbgmits/build/../test/test_target.cpp",line="11"},thread-id="1",stopped-threads="all"
I've attached the source file of the program I've used for testing, once built
the above notifications can be obtained by launching LLDB-MI (lldb-mi
--interpreter) or GDB-MI (gdb --interpreter mi) and entering the following
commands:
-file-exec-and-symbols path/to/test_target
-break-insert getNextInt
-exec-run
-exec-finish
GDB: GNU gdb (Ubuntu 7.8-1ubuntu4) 7.8.0.20141001-cvs
LLDB: lldb version 3.7.0 (https://github.com/llvm-mirror/lldb.git
revision 8733ed3778e9787602521c4b1f491d7da6eb5b04
clang revision 13756eaa7c29673267fd20651a56883335dca123
llvm revision 2c5bf601c34780d431cf652e436ef39030ff9213)
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