Package: gdb Version: 7.12-6 Severity: wishlist Tags: patch Dear maintainer,
please enable the --with-intel-pt configuration option for gdb. This allows for efficient Record-And-Play functionality in GDB [1] Intel PT (Processor Trace) provides hardware-level tracing capabilities with minimal performance overhead on modern Intel CPUs (beginning with the Broadwell micro-architecture). For more information about Intel PT, please refer to [2] and [3]. The Intel PT kernel driver has been merged in 4.1 and various bug fixes have come since ([4]). GDB supports the Intel PT backend for reverse-stepping / backwards-debugging since 7.10. Decoding of the packet stream generated by the Intel hardware is done by Intel's Processor Trace Decoding Library libipt [5]. Thus, this patchs adds a build-dependency on libipt-dev and a runtime dependency on libipt1. Please see the patch attached. Greetings Jack [1] https://sourceware.org/gdb/onlinedocs/gdb/Process-Record-and-Replay.html [2] https://software.intel.com/en-us/blogs/2013/09/18/processor-tracing [3] https://old.lwn.net/Articles/648154/ [4] http://halobates.de/blog/p/410 [5] https://github.com/01org/processor-trace
From b3fa17d7a4d2eb5d50ecd81f0ae339139b34d854 Mon Sep 17 00:00:00 2001
From: Jack Henschel <jack...@mailbox.org>
Date: Mon, 21 Aug 2017 13:21:35 +0200
Subject: [PATCH] Enable Intel PT
---
debian/control.in | 1 +
debian/rules | 5 +++++
2 files changed, 6 insertions(+)
diff --git a/debian/control.in b/debian/control.in
index 917c36cdb..db3dafdb7 100644
--- a/debian/control.in
+++ b/debian/control.in
@@ -35,6 +35,7 @@ Build-Depends:
liblzma-dev,
libbabeltrace-dev [amd64 armel armhf i386 kfreebsd-amd64 kfreebsd-i386 mips mipsel mips64el powerpc s390x],
libbabeltrace-ctf-dev [amd64 armel armhf i386 kfreebsd-amd64 kfreebsd-i386 mips mipsel mips64el powerpc s390x],
+ libipt-dev [amd64],
python-dev,
# Python3 build
python3-dev,
diff --git a/debian/rules b/debian/rules
index 74835a2f7..3850cc53b 100755
--- a/debian/rules
+++ b/debian/rules
@@ -93,6 +93,11 @@ ifneq (,$(filter $(DEB_HOST_ARCH),amd64 armel armhf i386 kfreebsd-amd64 kfreebsd
arch_config_args += --with-babeltrace
endif
+# Enable Intel Processor Trace (PT) on Linux x86 platform
+ifneq (,$(filter $(DEB_HOST_ARCH),amd64 i386))
+ arch_config_args += --with-intel-pt
+endif
+
ifdef GDB_TARGET
run_tests := no
--
2.14.1
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