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authorAndrew Tridgell <tridge@samba.org>2010-12-09 11:10:45 +1100
committerAndrew Tridgell <tridge@samba.org>2010-12-09 13:17:19 +1100
commitebe2867fc2c01fb5288d62eedb0e2f43788b9f27 (patch)
tree7107cdb3efebf7b13aa591442c2b5ef0484674fd
parent2771266defbf92373787e7f0fb795de713a02770 (diff)
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waf-abi: auto-generate per-symbol versions from ABI files
This changes our version-script generation to use the ABI files that are saved in git with each version number change of our public libraries. We use these ABI files to generate a linker version script that gives the exact version number that each symbol was introduced. This provides us with automatic fine grained symbol versioning. Pair-Programmed-With: Jelmer Vernooij <jelmer@samba.org> Pair-Programmed-With: Andrew Bartlett <abartlet@samba.org>
-rw-r--r--buildtools/wafsamba/samba_abi.py79
-rw-r--r--buildtools/wafsamba/samba_utils.py3
-rw-r--r--buildtools/wafsamba/wafsamba.py22
-rw-r--r--lib/talloc/wscript4
-rw-r--r--lib/tdb/wscript2
-rw-r--r--lib/tevent/wscript2
-rw-r--r--source4/lib/ldb/wscript3
7 files changed, 92 insertions, 23 deletions
diff --git a/buildtools/wafsamba/samba_abi.py b/buildtools/wafsamba/samba_abi.py
index cdce58763c..4059fe3378 100644
--- a/buildtools/wafsamba/samba_abi.py
+++ b/buildtools/wafsamba/samba_abi.py
@@ -1,6 +1,6 @@
# functions for handling ABI checking of libraries
-import Options, Utils, os, Logs, samba_utils, sys, Task, fnmatch, re
+import Options, Utils, os, Logs, samba_utils, sys, Task, fnmatch, re, Build
from TaskGen import feature, before, after
# these type maps cope with platform specific names for common types
@@ -117,7 +117,7 @@ if '--abi-check' in sys.argv:
def abi_check(self):
'''check that ABI matches saved signatures'''
env = self.bld.env
- if not env.ABI_CHECK or self.abi_file is None:
+ if not env.ABI_CHECK or self.abi_directory is None:
return
# if the platform doesn't support -fvisibility=hidden then the ABI
@@ -128,7 +128,80 @@ def abi_check(self):
topsrc = self.bld.srcnode.abspath()
abi_gen = os.path.join(topsrc, 'buildtools/scripts/abi_gen.sh')
+ abi_file = "%s/%s-%s.sigs" % (self.abi_directory, self.name, self.vnum)
+
tsk = self.create_task('abi_check', self.link_task.outputs[0])
- tsk.ABI_FILE = self.abi_file
+ tsk.ABI_FILE = abi_file
tsk.ABI_MATCH = self.abi_match
tsk.ABI_GEN = abi_gen
+
+
+
+def abi_process_file(fname, version, symmap):
+ '''process one ABI file, adding new symbols to the symmap'''
+ f = open(fname, mode='r')
+ for line in f:
+ symname = line.split(":")[0]
+ if not symname in symmap:
+ symmap[symname] = version
+ f.close()
+
+def abi_write_vscript(vscript, libname, vnum, symmap):
+ '''write a vscript file for a library in --version-script format'''
+
+ libname = libname.replace("-", "_").replace("+","_").upper()
+
+ invmap = {}
+ for s in symmap:
+ invmap.setdefault(symmap[s], []).append(s)
+
+ f = open(vscript, mode='w')
+ last_key = ""
+ for k in sorted(invmap):
+ symver = "%s_%s" % (libname, k)
+ if symver == version:
+ break
+ f.write("%s {\n\tglobal: \n" % symver)
+ for s in invmap[k]:
+ f.write("\t\t%s;\n" % s);
+ f.write("}%s;\n\n" % last_key)
+ last_key = " %s" % symver
+ f.write("%s { global: *;};\n" % version)
+ f.close()
+
+
+def abi_build_vscript(task):
+ '''generate a vscript file for our public libraries'''
+
+ tgt = task.outputs[0].bldpath(task.env)
+
+ symmap = {}
+
+ for f in task.inputs:
+ fname = f.abspath(task.env)
+ basename = os.path.basename(fname)
+ version = basename[len(task.env.LIBNAME)+1:-len(".sigs")]
+ abi_process_file(fname, version, symmap)
+ abi_write_vscript(tgt, task.env.LIBNAME, task.env.VNUM, symmap)
+
+
+def ABI_VSCRIPT(bld, libname, abi_directory, vnum, vscript):
+ '''generate a vscript file for our public libraries'''
+ if abi_directory:
+ source = bld.path.ant_glob('%s/%s-[0-9]*.sigs' % (abi_directory, libname))
+ source = sorted(source.split())
+ else:
+ source = ''
+
+ libname = libname.replace("-", "_").replace("+","_").upper()
+ version = version.replace("-", "_").replace("+","_").upper()
+
+ t = bld.SAMBA_GENERATOR(vscript,
+ rule=abi_build_vscript,
+ source=source,
+ group='vscripts',
+ target=vscript)
+ t.env.VNUM = vnum
+ t.env.LIBNAME = libname
+ t.vars = [vnum, vscript]
+Build.BuildContext.ABI_VSCRIPT = ABI_VSCRIPT
diff --git a/buildtools/wafsamba/samba_utils.py b/buildtools/wafsamba/samba_utils.py
index 5811cb3240..563009e093 100644
--- a/buildtools/wafsamba/samba_utils.py
+++ b/buildtools/wafsamba/samba_utils.py
@@ -339,6 +339,9 @@ def EXPAND_VARIABLES(ctx, varstr, vars=None):
ret.append(EXPAND_VARIABLES(ctx, s, vars=vars))
return ret
+ if not isinstance(varstr, str):
+ return varstr
+
import Environment
env = Environment.Environment()
ret = varstr
diff --git a/buildtools/wafsamba/wafsamba.py b/buildtools/wafsamba/wafsamba.py
index e7a23fb169..aea9d2bf30 100644
--- a/buildtools/wafsamba/wafsamba.py
+++ b/buildtools/wafsamba/wafsamba.py
@@ -118,7 +118,7 @@ def SAMBA_LIBRARY(bld, libname, source,
target_type='LIBRARY',
bundled_extension=True,
link_name=None,
- abi_file=None,
+ abi_directory=None,
abi_match=None,
hide_symbols=False,
manpages=None,
@@ -200,14 +200,6 @@ def SAMBA_LIBRARY(bld, libname, source,
else:
version = "%s_%s" % (Utils.g_module.APPNAME, Utils.g_module.VERSION.split(".")[0])
- if bld.env.HAVE_LD_VERSION_SCRIPT:
- vscript = "%s.vscript" % libname
- bld.SAMBA_GENERATOR(vscript,
- rule="echo %s \{ global: \*\; \}\; > ${TGT}" % version.replace("-","_").replace("+","_").upper(),
- group='vscripts',
- target=vscript)
- ldflags.append("-Wl,--version-script=%s/%s" % (bld.path.abspath(bld.env), vscript))
-
features = 'cc cshlib symlink_lib install_lib'
if target_type == 'PYTHON':
features += ' pyext'
@@ -215,11 +207,13 @@ def SAMBA_LIBRARY(bld, libname, source,
# this is quite strange. we should add pyext feature for pyext
# but that breaks the build. This may be a bug in the waf python tool
features += ' pyembed'
- if abi_file:
- features += ' abi_check'
- if abi_file:
- abi_file = os.path.join(bld.curdir, abi_file)
+ if abi_directory:
+ features += ' abi_check'
+ if bld.env.HAVE_LD_VERSION_SCRIPT:
+ vscript = "%s.vscript" % libname
+ bld.ABI_VSCRIPT(libname, abi_directory, vnum, vscript)
+ ldflags.append("-Wl,--version-script=%s/%s" % (bld.path.abspath(bld.env), vscript))
bld.SET_BUILD_GROUP(group)
t = bld(
@@ -238,7 +232,7 @@ def SAMBA_LIBRARY(bld, libname, source,
name = libname,
samba_realname = realname,
samba_install = install,
- abi_file = abi_file,
+ abi_directory = abi_directory,
abi_match = abi_match,
private_library = private_library,
grouping_library=grouping_library
diff --git a/lib/talloc/wscript b/lib/talloc/wscript
index e83caa5f4e..3d359c1281 100644
--- a/lib/talloc/wscript
+++ b/lib/talloc/wscript
@@ -96,7 +96,7 @@ def build(bld):
bld.SAMBA_LIBRARY('talloc',
'talloc.c',
deps='replace',
- abi_file='ABI/talloc-%s.sigs' % VERSION,
+ abi_directory='ABI',
abi_match='talloc* _talloc*',
hide_symbols=True,
vnum=vnum,
@@ -108,7 +108,7 @@ def build(bld):
bld.SAMBA_LIBRARY('pytalloc-util',
source='pytalloc_util.c',
public_deps='talloc',
- abi_file='ABI/pytalloc-util-%s.sigs' % VERSION,
+ abi_directory='ABI',
abi_match='py* Py*',
pyext=True,
vnum=vnum,
diff --git a/lib/tdb/wscript b/lib/tdb/wscript
index febd76b043..5fc64aa9e6 100644
--- a/lib/tdb/wscript
+++ b/lib/tdb/wscript
@@ -77,7 +77,7 @@ def build(bld):
COMMON_SRC,
deps='replace',
includes='include',
- abi_file='ABI/tdb-%s.sigs' % VERSION,
+ abi_directory='ABI',
abi_match='tdb_*',
hide_symbols=True,
vnum=vnum,
diff --git a/lib/tevent/wscript b/lib/tevent/wscript
index 8f8820f5a1..81cc594fc2 100644
--- a/lib/tevent/wscript
+++ b/lib/tevent/wscript
@@ -81,7 +81,7 @@ def build(bld):
SRC,
deps='replace talloc',
enabled= not bld.CONFIG_SET('USING_SYSTEM_TEVENT'),
- abi_file='ABI/tevent-%s.sigs' % VERSION,
+ abi_directory='ABI',
abi_match='tevent_* _tevent_*',
vnum=vnum,
private_library=private_library)
diff --git a/source4/lib/ldb/wscript b/source4/lib/ldb/wscript
index 8a4e83b69d..b785fefa10 100644
--- a/source4/lib/ldb/wscript
+++ b/source4/lib/ldb/wscript
@@ -121,7 +121,6 @@ def build(bld):
# the current modules, not the installed ones
modules_dir = os.path.join(os.getcwd(), 'bin/modules/ldb')
- abi_file = 'ABI/ldb-%s.sigs' % VERSION
abi_match = '!ldb_*module_ops !ldb_*backend_ops ldb_*'
bld.SAMBA_LIBRARY('ldb',
@@ -134,7 +133,7 @@ def build(bld):
vnum=vnum,
private_library=private_library,
manpages='man/ldb.3',
- abi_file = abi_file,
+ abi_directory = 'ABI',
abi_match = abi_match)