37 lines
1.2 KiB
Diff
37 lines
1.2 KiB
Diff
From 69b2c33a77fa687feb41fafdbe187013aa812384 Mon Sep 17 00:00:00 2001
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From: "Dmitry V. Levin" <ldv@altlinux.org>
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Date: Tue, 7 Jan 2020 18:54:55 +0000
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Subject: [PATCH] unwind-libdw: fix initialization of libdwfl cache
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This fixes stack trace printing for early syscalls that precede
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the first syscall from memory mapping or execve families.
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* unwind-libdw.c (tcb_init): Set struct ctx.last_proc_updating
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to a value different from mapping_generation so that libdwfl cache
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is properly initialized before the first use.
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* NEWS: Mention this fix.
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Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1788636
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---
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Backport changes:
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- NEWS hunk has been dropped.
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---
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NEWS | 2 ++
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unwind-libdw.c | 2 +-
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2 files changed, 3 insertions(+), 1 deletion(-)
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Index: strace-4.24/unwind-libdw.c
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===================================================================
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--- strace-4.24.orig/unwind-libdw.c 2020-01-23 12:55:01.922338273 +0100
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+++ strace-4.24/unwind-libdw.c 2020-01-23 12:55:06.131299136 +0100
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@@ -69,7 +69,7 @@
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struct ctx *ctx = xmalloc(sizeof(*ctx));
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ctx->dwfl = dwfl;
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- ctx->last_proc_updating = 0;
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+ ctx->last_proc_updating = mapping_generation - 1;
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return ctx;
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}
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