[3/3] Add testing for type signature fallback.
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| linaro-tcwg-bot/tcwg_gdb_build--master-arm |
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| linaro-tcwg-bot/tcwg_gdb_build--master-aarch64 |
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Commit Message
Create an executable with a type unit that loads a JIT objfile with a reference its type unit.
Then in the context of the JIT objfile the type is checked.
This causes a type signature lookup with a fallback to the main objfile.
---
.../gdb.dwarf2/sig-type-fallback-jit.c | 62 +++++++++++++++
.../gdb.dwarf2/sig-type-fallback-jit.exp | 75 +++++++++++++++++++
2 files changed, 137 insertions(+)
create mode 100644 gdb/testsuite/gdb.dwarf2/sig-type-fallback-jit.c
create mode 100644 gdb/testsuite/gdb.dwarf2/sig-type-fallback-jit.exp
new file mode 100644
@@ -0,0 +1,62 @@
+/* This test program is part of GDB, the GNU debugger.
+
+ Copyright 2024 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Simulate loading of JIT code. */
+
+#include "../gdb.base/jit-elf-util.h"
+#include "../gdb.base/jit-protocol.h"
+
+/* Must be defined by .exp file when compiling to know
+ what address to map the ELF binary to. */
+#ifndef LIB_ADDRESS
+#error "Must define LOAD_ADDRESS"
+#endif
+#ifndef LIB_NAME_STRING
+#error "Must define LIB_NAME_STRING"
+#endif
+
+int
+main ()
+{
+ size_t obj_size;
+ void *load_addr = (void *) (size_t) (LIB_ADDRESS);
+ void *addr = load_elf (LIB_NAME_STRING, &obj_size, load_addr);
+
+ /* Link entry at the end of the list. */
+ struct jit_code_entry *const entry = calloc (1, sizeof (*entry));
+ entry->symfile_addr = (const char *) addr;
+ entry->symfile_size = obj_size;
+ __jit_debug_descriptor.relevant_entry = entry;
+ __jit_debug_descriptor.first_entry = entry;
+
+ /* Notify GDB. */
+ __jit_debug_descriptor.action_flag = JIT_REGISTER;
+ __jit_debug_register_code ();
+
+ // breakpoint 1
+
+ /* Now unregister entry. */
+ /* Notify GDB. */
+ __jit_debug_descriptor.action_flag = JIT_UNREGISTER;
+ __jit_debug_register_code ();
+
+ __jit_debug_descriptor.first_entry = NULL;
+ __jit_debug_descriptor.relevant_entry = NULL;
+ free (entry);
+
+ return 0;
+}
new file mode 100644
@@ -0,0 +1,75 @@
+# Copyright 2024 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+
+load_lib dwarf.exp
+
+require dwarf2_support allow_shlib_tests
+
+set lib_address 0x7000000
+set lib_name libfoo.so
+
+standard_testfile .c .S -lib.S
+
+# Create fake DWARF TU for the main objfile.
+set asm_file [standard_output_file $srcfile2]
+Dwarf::assemble ${asm_file} {
+ tu {version 5} 0x1122334455667788 the_type {
+ type_unit {} {
+ the_type: base_type {
+ {name myType}
+ {encoding @DW_ATE_signed}
+ {byte_size 4 sdata}
+ }
+ }
+ }
+}
+
+# Create fake DWARF CU with type reference for the jit object file.
+set asm_file_lib [standard_output_file $srcfile3]
+Dwarf::assemble ${asm_file_lib} {
+ cu {} {
+ compile_unit {} {
+ declare_labels typedef_label
+
+ typedef_label: typedef {
+ {name bar}
+ {type 0x1122334455667788 ref_sig8 }
+ }
+ }
+ }
+}
+
+
+set libobj [standard_output_file $lib_name]
+if {[build_executable "build shared library" $libobj $asm_file_lib \
+ [list debug text_segment=$lib_address shlib]] != 0} {
+ return -1
+}
+
+if {[prepare_for_testing "failed to prepare" $testfile [list $srcfile $asm_file] \
+ [list debug additional_flags=-DLIB_ADDRESS=$lib_address \
+ additional_flags=-DLIB_NAME_STRING=\"$libobj\" ]]} {
+ return -1
+}
+
+if {![runto_main]} {
+ return -1
+}
+
+gdb_test_no_output "set dwarf-type-signature-fallback main"
+gdb_breakpoint [gdb_get_line_number "breakpoint 1"]
+gdb_continue_to_breakpoint "first breakpoint"
+gdb_test "ptype bar" "type = myType"
\ No newline at end of file