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From 56134ff5442bee4e128b189bb86cfc97dcb6f60a Mon Sep 17 00:00:00 2001
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From: Petr Machata <pmachata@redhat.com>
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Date: Fri, 10 Jan 2014 20:05:15 +0100
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Subject: [PATCH 1/2] Add a new per-breakpoint callback on_install
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---
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breakpoint.h | 9 ++++++++-
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breakpoints.c | 11 ++++++++++-
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2 files changed, 18 insertions(+), 2 deletions(-)
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diff --git a/breakpoint.h b/breakpoint.h
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index 95964a8..c36f673 100644
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--- a/breakpoint.h
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+++ b/breakpoint.h
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@@ -1,6 +1,6 @@
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/*
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* This file is part of ltrace.
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- * Copyright (C) 2012, 2013 Petr Machata, Red Hat Inc.
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+ * Copyright (C) 2012,2013,2014 Petr Machata, Red Hat Inc.
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* Copyright (C) 2009 Juan Cespedes
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*
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* This program is free software; you can redistribute it and/or
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@@ -46,6 +46,7 @@
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struct bp_callbacks {
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void (*on_hit)(struct breakpoint *bp, struct process *proc);
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void (*on_continue)(struct breakpoint *bp, struct process *proc);
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+ void (*on_install)(struct breakpoint *bp, struct process *proc);
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void (*on_retract)(struct breakpoint *bp, struct process *proc);
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/* Create a new breakpoint that should handle return from the
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@@ -84,6 +85,12 @@ void breakpoint_on_continue(struct breakpoint *bp, struct process *proc);
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* the instruction underneath it). */
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void breakpoint_on_retract(struct breakpoint *bp, struct process *proc);
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+/* Call ON_INSTALL handler of BP, if any is set. This should be
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+ * called after the breakpoint is enabled for the first time, not
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+ * every time it's enabled (such as after stepping over a site of a
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+ * temporarily disabled breakpoint). */
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+void breakpoint_on_install(struct breakpoint *bp, struct process *proc);
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+
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/* Call GET_RETURN_BP handler of BP, if any is set. If none is set,
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* call CREATE_DEFAULT_RETURN_BP to obtain one. */
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int breakpoint_get_return_bp(struct breakpoint **ret,
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diff --git a/breakpoints.c b/breakpoints.c
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index 947cb71..c3fa275 100644
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--- a/breakpoints.c
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+++ b/breakpoints.c
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@@ -1,6 +1,6 @@
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/*
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* This file is part of ltrace.
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- * Copyright (C) 2006,2007,2011,2012,2013 Petr Machata, Red Hat Inc.
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+ * Copyright (C) 2006,2007,2011,2012,2013,2014 Petr Machata, Red Hat Inc.
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* Copyright (C) 2009 Juan Cespedes
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* Copyright (C) 1998,2001,2002,2003,2007,2008,2009 Juan Cespedes
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* Copyright (C) 2006 Ian Wienand
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@@ -85,6 +85,14 @@ breakpoint_on_retract(struct breakpoint *bp, struct process *proc)
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(bp->cbs->on_retract)(bp, proc);
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}
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+void
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+breakpoint_on_install(struct breakpoint *bp, struct process *proc)
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+{
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+ assert(bp != NULL);
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+ if (bp->cbs != NULL && bp->cbs->on_install != NULL)
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+ (bp->cbs->on_install)(bp, proc);
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+}
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+
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int
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breakpoint_get_return_bp(struct breakpoint **ret,
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struct breakpoint *bp, struct process *proc)
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@@ -229,6 +237,7 @@ breakpoint_turn_on(struct breakpoint *bp, struct process *proc)
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if (bp->enabled == 1) {
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assert(proc->pid != 0);
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enable_breakpoint(proc, bp);
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+ breakpoint_on_install(bp, proc);
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}
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return 0;
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}
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--
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1.7.6.5
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