meson: Add dtrace support

dix/meson.build

@@ -33,10 +33,22 @@ srcs_dix = [
     'window.c',
 ]
 
+dtrace_src = []
+if with_dtrace
+    dtrace_object = generator(dtrace,
+        output: '@BASENAME@.o',
+        arguments: ['-G', '-s', '@INPUT@', '-o', '@OUTPUT@']
+    )
+
+    dtrace_src += dtrace_object.process(dtrace_tmpl)
+endif
+
+dtrace_dep = declare_dependency(sources: [dtrace_src, dtrace_hdr])
+
 libxserver_dix = static_library('libxserver_dix',
     srcs_dix,
     include_directories: inc,
-    dependencies: common_dep,
+    dependencies: [ dtrace_dep, common_dep, ]
 )
 
 libxserver_main = static_library('libxserver_main',

include/meson.build

@@ -31,7 +31,7 @@ cc.compiles('''
 ''',
     name: 'CLOCK_MONOTONIC'))
 
-#conf_data.set('XSERVER_DTRACE', '1') # XXX
+conf_data.set('XSERVER_DTRACE', with_dtrace)
 
 if host_machine.endian() == 'little'
     conf_data.set('X_BYTE_ORDER', 'X_LITTLE_ENDIAN')
@@ -402,6 +402,17 @@ configure_file(output : 'xwayland-config.h',
                input : 'xwayland-config.h.meson.in',
                configuration : xwayland_data)
 
+dtrace_hdr = []
+dtrace_tmpl = files('Xserver.d')
+if with_dtrace
+    dtrace_header = generator(dtrace,
+        output: '@BASENAME@-dtrace.h',
+        arguments: ['-h', '-s', '@INPUT@', '-o', '@OUTPUT@']
+    )
+
+    dtrace_hdr += dtrace_header.process(dtrace_tmpl)
+endif
+
 if build_xorg
     install_data(
         [

meson.build

@@ -175,6 +175,11 @@ else
     build_systemd_logind = get_option('systemd_logind') == 'true'
 endif
 
+with_dtrace = get_option('dtrace')
+if with_dtrace
+    dtrace = find_program('dtrace', required: true)
+endif
+
 build_xorg = false
 if (host_machine.system() != 'darwin' and
     host_machine.system() != 'windows')

meson_options.txt

@@ -50,6 +50,9 @@ option('vendor_name', type: 'string', value: 'The X.Org Foundation')
 option('vendor_name_short', type: 'string', value: 'X.Org')
 option('vendor_web', type: 'string', value: 'http://wiki.x.org')
 
+option('dtrace', type: 'boolean', value: false,
+       description: 'Enable dtrace hooks')
+
 option('listen_tcp', type: 'boolean', value: false,
        description: 'Listen on TCP by default')
 option('listen_unix', type: 'boolean', value: true,

os/meson.build

@@ -91,6 +91,7 @@ libxserver_os = static_library('libxserver_os',
     srcs_os,
     include_directories: inc,
     dependencies: [
+        dtrace_dep,
         common_dep,
         dl_dep,
         sha1_dep,