merge bitcoin#23724: add systemtap's sys/sdt.h as depends for GUIX builds with USDT tracepoints

configure.ac

@@ -138,11 +138,11 @@ AC_ARG_WITH([bdb],
   [use_bdb=$withval],
   [use_bdb=auto])
 
-AC_ARG_ENABLE([ebpf],
+AC_ARG_ENABLE([usdt],
-  [AS_HELP_STRING([--enable-ebpf],
+  [AS_HELP_STRING([--enable-usdt],
-  [enable eBPF tracing (default is yes if sys/sdt.h is found)])],
+  [enable tracepoints for Userspace, Statically Defined Tracing (default is yes if sys/sdt.h is found)])],
-  [use_ebpf=$enableval],
+  [use_usdt=$enableval],
-  [use_ebpf=yes])
+  [use_usdt=yes])
 
 AC_ARG_WITH([miniupnpc],
   [AS_HELP_STRING([--with-miniupnpc],
@@ -1408,15 +1408,15 @@ if test x$enable_wallet != xno; then
     fi
 fi
 
-if test x$use_ebpf != xno; then
+if test x$use_usdt != xno; then
-  AC_MSG_CHECKING([whether eBPF tracepoints are supported])
+  AC_MSG_CHECKING([whether Userspace, Statically Defined Tracing tracepoints are supported])
   AC_COMPILE_IFELSE([
     AC_LANG_PROGRAM(
       [#include <sys/sdt.h>],
       [DTRACE_PROBE("context", "event");]
     )],
-    [AC_MSG_RESULT(yes); have_sdt=yes; AC_DEFINE([ENABLE_TRACING], [1], [Define to 1 to enable eBPF user static defined tracepoints])],
+    [AC_MSG_RESULT(yes); AC_DEFINE([ENABLE_TRACING], [1], [Define to 1 to enable tracepoints for Userspace, Statically Defined Tracing])],
-    [AC_MSG_RESULT(no); have_sdt=no;]
+    [AC_MSG_RESULT(no); use_usdt=no;]
   )
 fi
 
@@ -1795,7 +1795,6 @@ AM_CONDITIONAL([TARGET_WINDOWS], [test x$TARGET_OS = xwindows])
 AM_CONDITIONAL([ENABLE_WALLET],[test x$enable_wallet = xyes])
 AM_CONDITIONAL([USE_SQLITE], [test "x$use_sqlite" = "xyes"])
 AM_CONDITIONAL([USE_BDB], [test "x$use_bdb" = "xyes"])
-AM_CONDITIONAL([ENABLE_TRACING],[test x$have_sdt = xyes])
 AM_CONDITIONAL([ENABLE_TESTS],[test x$BUILD_TEST = xyes])
 AM_CONDITIONAL([ENABLE_FUZZ],[test x$enable_fuzz = xyes])
 AM_CONDITIONAL([ENABLE_FUZZ_BINARY],[test x$enable_fuzz_binary = xyes])
@@ -1943,7 +1942,7 @@ echo "  with bench          = $use_bench"
 echo "  with upnp           = $use_upnp"
 echo "  with natpmp         = $use_natpmp"
 echo "  use asm             = $use_asm"
-echo "  ebpf tracing        = $have_sdt"
+echo "  USDT tracing        = $use_usdt"
 echo "  sanitizers          = $use_sanitizers"
 echo "  debug enabled       = $enable_debug"
 echo "  stacktraces enabled = $enable_stacktraces"

depends/Makefile

@@ -39,6 +39,7 @@ NO_SQLITE ?=
 NO_WALLET ?=
 NO_ZMQ ?=
 NO_UPNP ?=
+NO_USDT ?=
 NO_NATPMP ?=
 MULTIPROCESS ?=
 FALLBACK_DOWNLOAD_PATH ?= http://dash-depends-sources.s3-website-us-west-2.amazonaws.com
@@ -155,8 +156,9 @@ natpmp_packages_$(NO_NATPMP) = $(natpmp_packages)
 
 zmq_packages_$(NO_ZMQ) = $(zmq_packages)
 multiprocess_packages_$(MULTIPROCESS) = $(multiprocess_packages)
+usdt_packages_$(NO_USDT) = $(usdt_$(host_os)_packages)
 
-packages += $($(host_arch)_$(host_os)_packages) $($(host_os)_packages) $(qt_packages_) $(wallet_packages_) $(upnp_packages_) $(natpmp_packages_)
+packages += $($(host_arch)_$(host_os)_packages) $($(host_os)_packages) $(qt_packages_) $(wallet_packages_) $(upnp_packages_) $(natpmp_packages_) $(usdt_packages_)
 native_packages += $($(host_arch)_$(host_os)_native_packages) $($(host_os)_native_packages)
 
 ifneq ($(zmq_packages_),)
@@ -234,6 +236,7 @@ $(host_prefix)/share/config.site : config.site.in $(host_prefix)/.stamp_$(final_
             -e 's|@no_bdb@|$(NO_BDB)|' \
             -e 's|@no_sqlite@|$(NO_SQLITE)|' \
             -e 's|@no_upnp@|$(NO_UPNP)|' \
+            -e 's|@no_usdt@|$(NO_USDT)|' \
             -e 's|@no_natpmp@|$(NO_NATPMP)|' \
             -e 's|@multiprocess@|$(MULTIPROCESS)|' \
             -e 's|@debug@|$(DEBUG)|' \

depends/config.site.in

@@ -62,12 +62,16 @@ if test -z "$with_gui" && test -n "@no_qt@"; then
   with_gui=no
 fi
 
+if test -n "@debug@" && test -z "@no_qt@" && test "x$with_gui" != xno; then
+  with_gui=qt5_debug
+fi
+
 if test -z "$enable_zmq" && test -n "@no_zmq@"; then
   enable_zmq=no
 fi
 
-if test -n "@debug@" && test -z "@no_qt@" && test "x$with_gui" != xno; then
+if test -z "$enable_usdt" && test -n "@no_usdt@"; then
-  with_gui=qt5_debug
+  enable_usdt=no
 fi
 
 if test "@host_os@" = darwin; then

depends/packages/packages.mk

@@ -22,6 +22,8 @@ natpmp_packages=libnatpmp
 multiprocess_packages = libmultiprocess capnp
 multiprocess_native_packages = native_libmultiprocess native_capnp
 
+usdt_linux_packages=systemtap
+
 darwin_native_packages = native_ds_store native_mac_alias
 
 ifneq ($(build_os),darwin)

depends/packages/systemtap.mk

@@ -0,0 +1,12 @@
+package=systemtap
+$(package)_version=4.5
+$(package)_download_path=https://sourceware.org/systemtap/ftp/releases/
+$(package)_file_name=$(package)-$($(package)_version).tar.gz
+$(package)_sha256_hash=75078ed37e0dd2a769c9d1f9394170b2d9f4d7daa425f43ca80c13bad6cfc925
+$(package)_patches=remove_SDT_ASM_SECTION_AUTOGROUP_SUPPORT_check.patch
+
+define $(package)_preprocess_cmds
+  patch -p1 < $($(package)_patch_dir)/remove_SDT_ASM_SECTION_AUTOGROUP_SUPPORT_check.patch && \
+  mkdir -p $($(package)_staging_prefix_dir)/include/sys && \
+  cp includes/sys/sdt.h $($(package)_staging_prefix_dir)/include/sys/sdt.h
+endef

depends/patches/systemtap/remove_SDT_ASM_SECTION_AUTOGROUP_SUPPORT_check.patch

@@ -0,0 +1,31 @@
+commit b92d4c121486f3c6e8a2cea537c53eb09894479a
+Author: 0xb10c <0xb10c@gmail.com>
+Date:   Tue Dec 7 11:02:07 2021 +0100
+
+    Remove _SDT_ASM_SECTION_AUTOGROUP_SUPPORT check
+    
+    We assume that the assembler supports "?" in .pushsection directives.
+    This enables us to skip configure and make.
+    
+    See https://github.com/bitcoin/bitcoin/issues/23297.
+
+diff --git a/includes/sys/sdt.h b/includes/sys/sdt.h
+index 97766e710..352b4ee25 100644
+--- a/includes/sys/sdt.h
++++ b/includes/sys/sdt.h
+@@ -230,12 +230,10 @@ __extension__ extern unsigned long long __sdt_unsp;
+    nice with code in COMDAT sections, which comes up in C++ code.
+    Without that assembler support, some combinations of probe placements
+    in certain kinds of C++ code may produce link-time errors.  */
+-#include "sdt-config.h"
+-#if _SDT_ASM_SECTION_AUTOGROUP_SUPPORT
++/* PATCH: We assume that the assembler supports the feature. This
++   enables us to skip configure and make. In turn, this means we
++   require fewer dependencies and have shorter depend build times. */
+ # define _SDT_ASM_AUTOGROUP "?"
+-#else
+-# define _SDT_ASM_AUTOGROUP ""
+-#endif
+ 
+ #define _SDT_ASM_BODY(provider, name, pack_args, args)			      \
+   _SDT_ASM_1(990:	_SDT_NOP)					      \

doc/dependencies.md

@@ -24,7 +24,7 @@ These are the dependencies currently used by Dash Core. You can find instruction
 | Qt | [5.15.11](https://download.qt.io/official_releases/qt/) | [5.11.3](https://github.com/bitcoin/bitcoin/pull/24132) | No | |  |
 | SQLite | [3.32.1](https://sqlite.org/download.html) | [3.7.17](https://github.com/bitcoin/bitcoin/pull/19077) |  |  |  |
 | XCB |  |  |  |  | [Yes](https://github.com/dashpay/dash/blob/develop/depends/packages/qt.mk) (Linux only) |
-| systemtap ([tracing](tracing.md))|  |  |  |  | |
+| systemtap ([tracing](tracing.md))| [4.5](https://sourceware.org/systemtap/ftp/releases/) |  |  |  | |
 | xkbcommon |  |  |  |  | [Yes](https://github.com/dashpay/dash/blob/develop/depends/packages/qt.mk) (Linux only) |
 | ZeroMQ | [4.3.1](https://github.com/zeromq/libzmq/releases) | 4.0.0 | No |  |  |
 | zlib |  |  |  |  | [Yes](https://github.com/dashpay/dash/blob/develop/depends/packages/qt.mk) |