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From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
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From: Pedro Franco de Carvalho <pedromfc@linux.ibm.com>
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Date: Wed, 7 Jul 2021 15:44:29 -0400
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Subject: gdb-rhbz1854784-powerpc-remove-region-limit-dawr-1of7.patch
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;; Backport "Add low_new_clone method to linux_nat_target."
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;; (Pedro Franco de Carvalho, RH BZ 1854784)
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This patch adds a low_new_clone method to linux_nat_target, called after
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a PTRACE_EVENT_CLONE is detected, similar to how low_new_fork is called
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after PTRACE_EVENT_(V)FORK.
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This is useful for targets that need to copy state associated with a
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thread that is inherited across clones.
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gdb/ChangeLog:
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2020-03-30 Pedro Franco de Carvalho <pedromfc@linux.ibm.com>
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* linux-nat.h (low_new_clone): New method.
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* linux-nat.c (linux_handle_extended_wait): Call low_new_clone.
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diff --git a/gdb/linux-nat.c b/gdb/linux-nat.c
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--- a/gdb/linux-nat.c
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+++ b/gdb/linux-nat.c
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@@ -2020,6 +2020,10 @@ linux_handle_extended_wait (struct lwp_info *lp, int status)
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inferior. */
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linux_target->low_new_fork (lp, new_pid);
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}
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+ else if (event == PTRACE_EVENT_CLONE)
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+ {
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+ linux_target->low_new_clone (lp, new_pid);
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+ }
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if (event == PTRACE_EVENT_FORK
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&& linux_fork_checkpointing_p (lp->ptid.pid ()))
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diff --git a/gdb/linux-nat.h b/gdb/linux-nat.h
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--- a/gdb/linux-nat.h
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+++ b/gdb/linux-nat.h
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@@ -160,6 +160,10 @@ public:
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virtual void low_new_fork (struct lwp_info *parent, pid_t child_pid)
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{}
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+ /* The method to call, if any, when a new clone event is detected. */
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+ virtual void low_new_clone (struct lwp_info *parent, pid_t child_lwp)
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+ {}
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+
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/* The method to call, if any, when a process is no longer
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attached. */
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virtual void low_forget_process (pid_t pid)
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