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[PATCH 0/9] software single-step support rework, fix limitations
- From: Pedro Alves <palves at redhat dot com>
- To: gdb-patches at sourceware dot org
- Date: Fri, 26 Sep 2014 01:39:33 +0100
- Subject: [PATCH 0/9] software single-step support rework, fix limitations
- Authentication-results: sourceware.org; auth=none
This series reworks software single-step support. In a nutshell:
- Makes single-step breakpoints regular breakpoints and puts them on
the global location chain.
- Makes the moribund location machinery aware of software single-step
breakpoints.
- Removes the currently limitation that only 2 single-step breakpoints
can be inserted. Some archs, like PPC, need this.
- Makes software single-step work when stepping through read-only code
regions.
- Adds support for having multiple threads software single-stepping
simultaneously. Currently, in non-stop, all single-step requests
are handled by displaced stepping the threads, which means threads
are serialized, because only one thread can be displaced stepping at
any given time.
- Finally eliminates deprecated_insert_raw_breakpoint and friends.
- Removes a set of run control globals along the way.
- And cleans things up here and there.
Tested on:
- x86_64 Fedora 20
- x86_64 Fedora 20 w/ 'software single-step on x86' series
- PPC64 Fedora 18
Pedro Alves (9):
Decide whether we may have removed breakpoints based on step_over_info
Rewrite non-continuable watchpoints handling
Put single-step breakpoints on the bp_location chain
Remove deprecated_insert_raw_breakpoint and friends
Switch back to stepped thread: clear step-over info
thread.c: cleanup breakpoint deletion
infrun.c: add for_each_just_stopped_thread
Make single-step breakpoints be per-thread
Non-stop + software single-step archs: don't force displaced-stepping
for all single-steps
gdb/breakpoint.c | 402 +++++++++++++-----------------------------------------
gdb/breakpoint.h | 31 ++---
gdb/gdbthread.h | 25 ++++
gdb/infrun.c | 360 ++++++++++++++++++++++--------------------------
gdb/infrun.h | 4 +
gdb/record-full.c | 8 +-
gdb/thread.c | 80 ++++++++---
7 files changed, 364 insertions(+), 546 deletions(-)
--
1.9.3