[PATCH 00/12 V2] Use reinsert breakpoint for vCont;s

Yao Qi
2016-06-02T09:31:06Z

Here is the V2 of this patch series, V1 can be found
https://sourceware.org/ml/gdb-patches/2016-05/msg00358.html

Nowadays, reinsert breakpoint is used in GDBserver to step over a
breakpoint. I want to use it to handle vCont;s too. The idea is that
when GDBserver receives resume_step request from GDB, use the software
single step logic, insert reinsert_breakpoint on the next pcs, and
resume the thread. This means we have multiple reinsert_breakpoints
for different threads for either step-over or vCont;s.

Patches 2~5 are the fixes to existing GDBserver problems on step-over
with reinsert_breakpoint in various cases (exit, fork, and vfork).
Although these 4 patches can be sent as another patch series, I still
include them in this series, as they are derived from the V1 review.

Patches 7 and 12 aren't changed. All review comments are addressed
in the rest of patches. Once this series goes in, I'll start to rename
'reinsert_breakpoint' and 'other_breakpoint' to match their usages in
GDBserver.

Regression tested on {x86_64, arm, aarch64}-linux.

*** BLURB HERE ***

Yao Qi (12):
Switch to current thread in finish_step_over
More assert checks on reinsert breakpoint
Step over exit with reinsert breakpoints
Delete reinsert breakpoints from forked child
Handle reinsert breakpoints for vforked child
Pass breakpoint type in set_breakpoint_at
Create sub classes of 'struct breakpoint'
Refactor clone_all_breakpoints
Make reinsert_breakpoint thread specific
Switch current_thread to lwp's thread in
install_software_single_step_breakpoints
Use reinsert_breakpoint for vCont;s
Support vCont s and S actions with software single step

gdb/gdbserver/gdbthread.h | 3 +
gdb/gdbserver/inferiors.c | 12 +
gdb/gdbserver/linux-low.c | 206 +++++++++++++++--
gdb/gdbserver/mem-break.c | 341 +++++++++++++++++++++-------
gdb/gdbserver/mem-break.h | 44 ++--
gdb/gdbserver/server.c | 17 +-
gdb/testsuite/gdb.base/step-over-exit.c | 50 ++++
gdb/testsuite/gdb.base/step-over-exit.exp | 127 +++++++++++
gdb/testsuite/gdb.base/step-over-fork-1.c | 51 +++++
gdb/testsuite/gdb.base/step-over-fork-1.exp | 106 +++++++++
10 files changed, 842 insertions(+), 115 deletions(-)
create mode 100644 gdb/testsuite/gdb.base/step-over-exit.c
create mode 100644 gdb/testsuite/gdb.base/step-over-exit.exp
create mode 100644 gdb/testsuite/gdb.base/step-over-fork-1.c
create mode 100644 gdb/testsuite/gdb.base/step-over-fork-1.exp

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1.9.1