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import systemtap-4.5-8.el9_b

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CentOS Sources 2021-11-02 07:36:00 -04:00 committed by Stepan Oksanichenko
parent 041325fbf8
commit b63617a7a9
2 changed files with 241 additions and 1 deletions
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237
SOURCES/rhbz1985124.patch
View File

@ -852,3 +852,240 @@ index 40dc3e2e0..d47462513 100644
spin_unlock(&files->file_lock);
}
commit e6a1b008b822ed211b8f9c15fda565f8d51e512d
Author: Stan Cox <scox@redhat.com>
Date: Thu Aug 26 09:46:20 2021 -0400
Shorten function names that will exceed the kernel's objtool limit of 128
translate.cxx (c_unparser::emit_global_init_type,emit_function) Shorten
(c_unparser::c_funcname) Add funcname_shortened parm, shorten
name if length limit exceeded
testsuite/systemtap.base/func_definition.{exp,stp} Add shorten funcname test.
diff --git a/testsuite/systemtap.base/func_definition.exp b/testsuite/systemtap.base/func_definition.exp
index 6598aeea5..0aeab4c70 100644
--- a/testsuite/systemtap.base/func_definition.exp
+++ b/testsuite/systemtap.base/func_definition.exp
@@ -5,9 +5,25 @@ if {![installtest_p]} { untested "$test"; return }
foreach runtime [get_runtime_list] {
if {$runtime != ""} {
- stap_run $test no_load (${all_pass_string}){5} \
+ stap_run $test no_load (${all_pass_string}){6} \
--runtime=$runtime $srcdir/$subdir/$test.stp
} else {
- stap_run $test no_load (${all_pass_string}){5} $srcdir/$subdir/$test.stp
+ stap_run $test no_load (${all_pass_string}){6} $srcdir/$subdir/$test.stp
}
}
+
+set ok 0
+set cmd "bash -c {$env(SYSTEMTAP_PATH)/stap --runtime=$runtime -v -v -p3 $srcdir/$subdir/$test.stp |& grep -A 1 'function_names_over_128'}"
+eval spawn $cmd
+expect {
+ -timeout 180
+ # Match shortened function declaration, definition, and reference
+ -re { function_[0-9] } { incr ok; exp_continue }
+ eof { }
+}
+
+if {$ok == 3} {
+ pass "$test function name shorten"
+} else {
+ fail "$test function name shorten ($ok!=3)"
+}
diff --git a/testsuite/systemtap.base/func_definition.stp b/testsuite/systemtap.base/func_definition.stp
index eaa8d94c5..7ed938eb9 100644
--- a/testsuite/systemtap.base/func_definition.stp
+++ b/testsuite/systemtap.base/func_definition.stp
@@ -39,6 +39,11 @@ function f5()
println("systemtap test success")
}
+function function_names_over_128_characters_exceed_MAX_NAME_LEN_in_linux_objtool_which_is_invoked_by_kbuild_and_are_therefore_shortened()
+{
+ return 2021
+}
+
probe end {
println("systemtap ending probe")
@@ -57,4 +62,7 @@ probe end {
printf("systemtap test failure - return_value of f4:%d != 2015\n", f4())
f5()
+
+ if (function_names_over_128_characters_exceed_MAX_NAME_LEN_in_linux_objtool_which_is_invoked_by_kbuild_and_are_therefore_shortened() == 2021)
+ println("systemtap test success")
}
diff --git a/translate.cxx b/translate.cxx
index 59fa2e4a0..beb7d7acd 100644
--- a/translate.cxx
+++ b/translate.cxx
@@ -58,6 +58,9 @@ extern "C" {
#define STAP_T_06 _("\"empty aggregate\";")
#define STAP_T_07 _("\"histogram index out of range\";")
+// This matches MAX_NAME_LEN in linux objtool/elf.c used by kbuild
+#define MAX_NAME_LEN 128
+
using namespace std;
class var;
@@ -183,6 +186,7 @@ struct c_unparser: public unparser, public visitor
virtual string c_localname (const string& e, bool mangle_oldstyle = false);
virtual string c_globalname (const string &e);
virtual string c_funcname (const string &e);
+ virtual string c_funcname (const string &e, bool &funcname_shortened);
string c_arg_define (const string& e);
string c_arg_undef (const string& e);
@@ -1755,7 +1759,11 @@ c_unparser::emit_global_init_type (vardecl *v)
void
c_unparser::emit_functionsig (functiondecl* v)
{
- o->newline() << "static void " << c_funcname(v->name)
+ bool funcname_shortened;
+ string funcname = c_funcname (v->name, funcname_shortened);
+ if (funcname_shortened)
+ o->newline() << "/* " << v->name << " */";
+ o->newline() << "static void " << funcname
<< " (struct context * __restrict__ c);";
}
@@ -2520,7 +2528,11 @@ c_tmpcounter::emit_function (functiondecl* fd)
// indent the dummy output as if we were already in a block
this->o->indent (1);
- o->newline() << "struct " << c_funcname (fd->name) << "_locals {";
+ bool funcname_shortened;
+ string funcname = c_funcname (fd->name, funcname_shortened);
+ if (funcname_shortened)
+ o->newline() << "/* " << fd->name << " */";
+ o->newline() << "struct " << funcname << "_locals {";
o->indent(1);
for (unsigned j=0; j<fd->locals.size(); j++)
@@ -2615,7 +2627,11 @@ c_unparser::emit_function (functiondecl* v)
this->action_counter = 0;
this->already_checked_action_count = false;
- o->newline() << "static void " << c_funcname (v->name)
+ bool funcname_shortened;
+ string funcname = c_funcname (v->name, funcname_shortened);
+ if (funcname_shortened)
+ o->newline() << "/* " << v->name << " */";
+ o->newline() << "static void " << funcname
<< " (struct context* __restrict__ c) {";
o->indent(1);
@@ -3385,11 +3401,41 @@ c_unparser::c_globalname (const string& e)
string
-c_unparser::c_funcname (const string& e)
+c_unparser::c_funcname (const string& e, bool& funcname_shortened)
{
+ const string function_prefix = "function_";
// XXX uncomment to test custom mangling:
- // return "function_" + e + "_" + lex_cast(do_hash(e.c_str()));
- return "function_" + e;
+ // return function_prefix + e + "_" + lex_cast(do_hash(e.c_str()));
+
+ // The kernel objtool used by kbuild has a hardcoded function length limit
+ if (e.length() > MAX_NAME_LEN - function_prefix.length())
+ {
+ int function_index = 0;
+ for (map<string,functiondecl*>::iterator it = session->functions.begin();
+ it != session->functions.end(); it++)
+ {
+ if (it->first == e)
+ {
+ funcname_shortened = true;
+ return function_prefix + to_string(function_index);
+ }
+ function_index += 1;
+ }
+ throw SEMANTIC_ERROR (_("unresolved symbol: ") + e); // should not happen
+ }
+ else
+ {
+ funcname_shortened = false;
+ return function_prefix + e;
+ }
+}
+
+
+string
+c_unparser::c_funcname (const string& e)
+{
+ bool funcname_shortened;
+ return c_funcname (e, funcname_shortened);
}
commit 3bca174698360389fbf2c28e8eaaacc0b7cbbdb0
Author: Stan Cox <scox@redhat.com>
Date: Mon Aug 30 16:53:51 2021 -0400
Use lex_cast instead of to_string when shortening function names.
diff --git a/testsuite/systemtap.base/func_definition.exp b/testsuite/systemtap.base/func_definition.exp
index 0aeab4c70..721900f98 100644
--- a/testsuite/systemtap.base/func_definition.exp
+++ b/testsuite/systemtap.base/func_definition.exp
@@ -13,7 +13,7 @@ foreach runtime [get_runtime_list] {
}
set ok 0
-set cmd "bash -c {$env(SYSTEMTAP_PATH)/stap --runtime=$runtime -v -v -p3 $srcdir/$subdir/$test.stp |& grep -A 1 'function_names_over_128'}"
+set cmd "bash -c {$env(SYSTEMTAP_PATH)/stap -v -v -p3 $srcdir/$subdir/$test.stp |& grep -A 1 'function_names_over_128'}"
eval spawn $cmd
expect {
-timeout 180
diff --git a/translate.cxx b/translate.cxx
index beb7d7acd..312fd0801 100644
--- a/translate.cxx
+++ b/translate.cxx
@@ -3410,14 +3410,14 @@ c_unparser::c_funcname (const string& e, bool& funcname_shortened)
// The kernel objtool used by kbuild has a hardcoded function length limit
if (e.length() > MAX_NAME_LEN - function_prefix.length())
{
- int function_index = 0;
+ long function_index = 0;
for (map<string,functiondecl*>::iterator it = session->functions.begin();
it != session->functions.end(); it++)
{
if (it->first == e)
{
funcname_shortened = true;
- return function_prefix + to_string(function_index);
+ return function_prefix + lex_cast (function_index);
}
function_index += 1;
}
commit 4996a29c6b5dd891aeaf31df1a50058bd785621b
Author: Frank Ch. Eigler <fche@redhat.com>
Date: Thu Sep 9 21:22:31 2021 -0400
tapset: start adopting kernel netif_* tracepoints in netdev.* tapset
Start with netdev.receive.
diff --git a/tapset/linux/networking.stp b/tapset/linux/networking.stp
index 0b52cbc50..bf9cabfd5 100644
--- a/tapset/linux/networking.stp
+++ b/tapset/linux/networking.stp
@@ -117,7 +117,8 @@ function get_netdev_name:string (addr:long) {
///</para>
// Main device receive routine, be called when packet arrives on network device
probe netdev.receive
- = kernel.function("netif_receive_skb_internal") !,
+ = kernel.trace("netif_receive_skb") !,
+ kernel.function("netif_receive_skb_internal") !,
kernel.function("netif_receive_skb")
{
try { dev_name = get_netdev_name($skb->dev) } catch { }

5
SPECS/systemtap.spec
View File

@ -90,7 +90,7 @@
Name: systemtap
Version: 4.5
Release: 7%{?release_override}%{?dist}
Release: 8%{?release_override}%{?dist}
# for version, see also configure.ac
@ -1221,6 +1221,9 @@ exit 0
# PRERELEASE
%changelog
* Thu Sep 09 2021 Frank Ch. Eigler <fche@redhat.com> - 4.5-8
- rhbz1985124: Kernel 5.14 compatibility omnibus cont'd.
* Thu Aug 12 2021 Frank Ch. Eigler <fche@redhat.com> - 4.5-7
- rhbz1985124: Kernel 5.14 compatibility omnibus.