From: Bruno Larsen <blarsen@redhat.com>
To: gdb-patches@sourceware.org
Subject: [PATCH 03/11] gdb/testsuite: account for clang's recursive destructor calls on gdb.cp/mb-ctor.exp
Date: Tue, 4 Oct 2022 19:07:38 +0200 [thread overview]
Message-ID: <20221004170747.154307-4-blarsen@redhat.com> (raw)
In-Reply-To: <20221004170747.154307-1-blarsen@redhat.com>
When compiling virtual classes's destructors, two versions are compiled,
one with a single parameter (this) and the other with 2 parameters (this
and vtt).
GCC's compilation makes it so either the version with 1
parameter or the one with 2 parameters is called, depending on whether
the destructor is being called by the class itself or by an inherited
class. On the test gdb.cp/mb-ctor.exp, this means that the breakpoint
set at the destructor will be hit 4 times.
Clang, on the other hand, makes the single-parameter version call the 2
parameter version, probably in an attempt to reduce the size of the
resulting executable. This means that the gdb.cp/mb-ctor.exp will hit 6
breakpoints before finishing, and is the reason why this test was
failing. To make this test stop failing, a compiler check is added and
another "continue" instruction is issued to account for this difference.
---
gdb/testsuite/gdb.cp/mb-ctor.exp | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/gdb/testsuite/gdb.cp/mb-ctor.exp b/gdb/testsuite/gdb.cp/mb-ctor.exp
index 5a3c0a4a90f..6aadecdd27d 100644
--- a/gdb/testsuite/gdb.cp/mb-ctor.exp
+++ b/gdb/testsuite/gdb.cp/mb-ctor.exp
@@ -25,6 +25,12 @@ if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}]} {
return -1
}
+if {[test_compiler_info {clang-*-*}]} {
+ set using_clang true
+} else {
+ set using_clang false
+}
+
if ![runto_main] then {
perror "couldn't run to breakpoint"
return
@@ -71,6 +77,12 @@ gdb_continue_to_breakpoint "set breakpoint here, second dynamic time"\
gdb_test "continue" ".*Breakpoint.*~Derived.*" "Run to dynamic destructor v1"
+# Clang makes Derived::~Derived(this) call Derived::~Derives(this, vtt)
+# whereas gcc puts all the logic necessary on both functions.
+if {$using_clang} {
+ gdb_test "continue" ".*Breakpoint.*~Derived.*" "clang's recursive dynamic destructor call"
+}
+
gdb_test "continue" ".*Breakpoint.*~Derived.*" "Run to dynamic destructor v2"
gdb_test "continue" \
@@ -81,6 +93,10 @@ gdb_test "continue" \
".*Breakpoint.*~Derived.*" \
"run to breakpoint 3 v2"
+if {$using_clang} {
+ gdb_test "continue" ".*Breakpoint.*~Derived.*" "clang's recursive destructor call"
+}
+
gdb_test "continue" \
".*exited normally.*" \
"run to exit"
--
2.37.3
next prev parent reply other threads:[~2022-10-04 17:08 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-04 17:07 [PATCH 00/11] Cleanup gdb.cp tests when running with clang Bruno Larsen
2022-10-04 17:07 ` [PATCH 01/11] gdb/testsuite: ignore Non-C-typedefs for gdb.cp/class2.exp Bruno Larsen
2022-10-26 12:02 ` Andrew Burgess
2022-10-27 8:37 ` Bruno Larsen
2022-10-28 11:37 ` Andrew Burgess
2022-10-04 17:07 ` [PATCH 02/11] gdb/testsuite: enable running gdb.cp/classes.exp with clang Bruno Larsen
2022-10-26 12:19 ` Andrew Burgess
2022-10-04 17:07 ` Bruno Larsen [this message]
2022-10-26 12:35 ` [PATCH 03/11] gdb/testsuite: account for clang's recursive destructor calls on gdb.cp/mb-ctor.exp Andrew Burgess
2022-10-04 17:07 ` [PATCH 4/9] gdb/testsuite: add XFAIL to gdb.cp/derivation.exp when using clang Bruno Larsen
2022-10-04 17:09 ` Bruno Larsen
2022-10-04 17:07 ` [PATCH 04/11] " Bruno Larsen
2022-10-26 12:37 ` Andrew Burgess
2022-10-26 14:50 ` Andrew Burgess
2022-10-04 17:07 ` [PATCH 05/11] gdb/testsuite: allow for clang style destructors on gdb.cp/m-static.exp Bruno Larsen
2022-10-26 13:04 ` Andrew Burgess
2022-10-26 14:51 ` Andrew Burgess
2022-10-04 17:07 ` [PATCH 06/11] gdb/testsuite: add XFAIL to gdb.cp/ptype-flags.exp when using clang Bruno Larsen
2022-10-26 14:08 ` Andrew Burgess
2022-10-27 13:17 ` Bruno Larsen
2022-10-28 11:38 ` Andrew Burgess
2022-10-31 12:45 ` Bruno Larsen
2022-10-04 17:07 ` [PATCH 07/11] gdb/testsuite: skip gdb.cp/anon-struct.exp " Bruno Larsen
2022-10-26 14:49 ` Andrew Burgess
2022-10-27 13:46 ` Bruno Larsen
2022-10-04 17:07 ` [PATCH 08/11] gdb/testsuite: disable gdb.cp/typeid.exp " Bruno Larsen
2022-10-26 15:37 ` Andrew Burgess
2022-10-04 17:07 ` [PATCH 09/11] gdb/testsuite: fix gdb.cp/converts.exp to run with clang Bruno Larsen
2022-10-26 15:54 ` Andrew Burgess
2022-10-31 12:46 ` Bruno Larsen
2022-10-04 17:07 ` [PATCH 10/11] gdb/testsuite: remove XFAIL on gdb.cp/temargs.exp Bruno Larsen
2022-10-26 15:57 ` Andrew Burgess
2022-10-04 17:07 ` [PATCH 11/11] gdb/testsuite: disable gdb.cp/call-method-register.exp with clang Bruno Larsen
2022-10-27 9:49 ` Andrew Burgess
2022-10-31 10:51 ` Bruno Larsen
2022-10-18 8:10 ` [PING][PATCH 00/11] Cleanup gdb.cp tests when running " Bruno Larsen
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