mirror of
https://github.com/bminor/binutils-gdb.git
synced 2025-12-27 01:28:46 +00:00
ffa404804e
While working with objfiles in Python I noticed that gdb.Progspace.objfile_for_address () does not return "dynamic" objfiles created by (for example) GDB's JIT reader API. This is because is_addr_in_objfile() checks if a given address falls into any (mappped) section of that objfile. However objfiles created by JIT reader API do not have sections. To solve this issue, this commit updates is_addr_in_objfile() to also check if the address fall into any compunit in that objfile. It does so only if the objfile has no sections.
306 lines
9.4 KiB
Plaintext
306 lines
9.4 KiB
Plaintext
# Copyright 2012-2025 Free Software Foundation, Inc.
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# Optionally test a Python API here as well.
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load_lib gdb-python.exp
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standard_testfile jit-reader-host.c
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require {is_any_target "i?86-*-*" "x86_64-*-*"} is_lp64_target
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require allow_shlib_tests isnative
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# Increase this to see more detail.
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set test_verbose 0
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set jit_host_src $srcfile
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set jit_host_bin $binfile
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# We inject the complete path to jit-reader.h into the source file
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# lest we end up (incorrectly) building against a system-installed
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# version.
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set jit_reader_header [standard_output_file "../../../../../gdb/jit-reader.h"]
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set jit_reader_flag "-DJIT_READER_H=\"$jit_reader_header\""
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if { [gdb_compile "${srcdir}/${subdir}/${jit_host_src}" "${jit_host_bin}" \
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executable [list debug additional_flags=$jit_reader_flag]] != "" } {
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untested "failed to compile"
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return -1
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}
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set jit_reader jit-reader
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set jit_reader_src ${jit_reader}.c
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set jit_reader_bin [standard_output_file ${jit_reader}.so]
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if { [gdb_compile_shlib "${srcdir}/${subdir}/${jit_reader_src}" "${jit_reader_bin}" \
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[list debug additional_flags=$jit_reader_flag]] != "" } {
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untested "failed to compile"
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return -1
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}
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# Test "info registers" in the current frame, expecting RSP's value to
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# be SP.
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proc info_registers_current_frame {sp} {
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global hex decimal
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set any "\[^\r\n\]*"
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set neg_decimal "-?$decimal"
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set expected \
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[multi_line \
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"rax $hex +$neg_decimal" \
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"rbx $hex +$neg_decimal" \
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"rcx $hex +$neg_decimal" \
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"rdx $hex +$neg_decimal" \
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"rsi $hex +$neg_decimal" \
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"rdi $hex +$neg_decimal" \
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"rbp $hex +$hex" \
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"rsp $sp +$sp" \
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"r8 $hex +$neg_decimal" \
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"r9 $hex +$neg_decimal" \
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"r10 $hex +$neg_decimal" \
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"r11 $hex +$neg_decimal" \
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"r12 $hex +$neg_decimal" \
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"r13 $hex +$neg_decimal" \
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"r14 $hex +$neg_decimal" \
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"r15 $hex +$neg_decimal" \
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"rip $hex +$hex$any" \
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"eflags $hex +\\\[$any\\\]" \
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"cs $hex +$neg_decimal" \
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"ss $hex +$neg_decimal" \
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"ds $hex +$neg_decimal" \
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"es $hex +$neg_decimal" \
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"fs $hex +$neg_decimal" \
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"gs $hex +$neg_decimal" \
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]
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# There may be more registers.
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append expected ".*"
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gdb_test "info registers" $expected
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}
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proc jit_reader_test {} {
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global jit_host_bin
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global jit_reader_bin
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global test_verbose
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global hex decimal
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set any "\[^\r\n\]*"
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clean_restart
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gdb_load $jit_host_bin
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gdb_load_shlib $jit_reader_bin
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if {$test_verbose > 0} {
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gdb_test_no_output "set debug jit 1"
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}
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# Just test that this is installed and prints something.
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gdb_test "show jit-reader-directory" \
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"JIT reader directory is .*\\."
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gdb_test_no_output "jit-reader-load ${jit_reader_bin}" "jit-reader-load"
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gdb_run_cmd
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gdb_test "" "Program received signal SIGTRAP, .*" "expect SIGTRAP"
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# Test the JIT reader unwinder.
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with_test_prefix "with jit-reader" {
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with_test_prefix "before mangling" {
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gdb_test "bt" \
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[multi_line \
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"#0 ${any} in jit_function_stack_mangle ${any}" \
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"#1 ${any} in main ${any}" \
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] \
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"bt works"
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set sp_before_mangling \
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[get_hexadecimal_valueof "\$sp" 0 "get sp"]
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gdb_test "up" "#1 $any in main $any\r\n$any function_stack_mangle $any" \
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"move up to caller"
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set caller_sp \
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[get_hexadecimal_valueof "\$sp" 0 "get caller sp"]
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}
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# Step over the instruction that mangles the stack pointer.
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# While that confuses GDB's built-in unwinder, the JIT
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# reader's unwinder understands the mangling and should thus
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# be able to unwind at that location.
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with_test_prefix "after mangling" {
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gdb_test "si" "in jit_function_stack_mangle .*" "step over stack mangling"
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set sp_after_mangling \
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[get_hexadecimal_valueof "\$sp" 0 "get sp"]
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gdb_assert {$sp_before_mangling != $sp_after_mangling} \
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"sp is mangled"
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# Check that the jit unwinder manages to backtrace through
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# the mangled stack pointer.
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gdb_test "bt" \
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[multi_line \
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"#0 ${any} in jit_function_stack_mangle ${any}" \
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"#1 ${any} in main ${any}" \
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] \
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"bt works"
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with_test_prefix "current frame" {
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info_registers_current_frame $sp_after_mangling
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gdb_test "info frame" \
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"Stack level 0, frame at $sp_before_mangling.*in jit_function_stack_mangle.*"
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}
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with_test_prefix "caller frame" {
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gdb_test "up" "#1 $any in main $any\r\n$any function_stack_mangle $any" \
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"up to caller"
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# Since the JIT unwinder only provides RIP/RSP/RBP,
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# all other registers should show as "<not saved>".
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set expected \
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[multi_line \
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"rax <not saved>" \
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"rbx <not saved>" \
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"rcx <not saved>" \
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"rdx <not saved>" \
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"rsi <not saved>" \
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"rdi <not saved>" \
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"rbp $hex +$hex" \
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"rsp $caller_sp +$caller_sp" \
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"r8 <not saved>" \
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"r9 <not saved>" \
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"r10 <not saved>" \
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"r11 <not saved>" \
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"r12 <not saved>" \
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"r13 <not saved>" \
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"r14 <not saved>" \
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"r15 <not saved>" \
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"rip $hex +$hex $any" \
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"eflags <not saved>" \
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"cs <not saved>" \
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"ss <not saved>" \
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"ds <not saved>" \
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"es <not saved>" \
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"fs <not saved>" \
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"gs <not saved>" \
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]
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# There may be more registers.
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append expected ".*"
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gdb_test "info registers" $expected
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# Make sure that "info frame" doesn't crash.
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gdb_test "info frame" "Stack level 1, .*in main.*"
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# ... and that neither does printing a pseudo
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# register.
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gdb_test "print /x \$ebp" " = $hex" "print pseudo register"
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# There's no way for the JIT reader API to support
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# modifyiable values.
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gdb_test "print \$rbp = -1" \
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"Attempt to assign to an unmodifiable value\." \
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"cannot assign to register"
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}
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if { [allow_python_tests] } {
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gdb_test "python print(gdb.objfiles())" \
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"$any<gdb.Objfile filename=<< JIT compiled code at $hex >>>$any" \
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"python gdb.Objfile.__repr__ ()"
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gdb_test "python print(list(map(lambda objf : objf.filename, gdb.objfiles())))" \
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"$any'<< JIT compiled code at $hex >>'$any" \
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"python gdb.Objfile.filename"
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gdb_test "python print( \[o for o in gdb.objfiles() if o.filename.startswith('<< JIT compiled code')\]\[0\].build_id )" \
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"None" \
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"python gdb.Objfile.build_id"
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# Check that Progspace.objfile_for_address () finds "jitted"
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# objfile
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gdb_test "frame 0" \
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"#0 $hex in jit_function_stack_mangle ()$any" \
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"select frame 0"
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gdb_test "python print( gdb.current_progspace().objfile_for_address(gdb.parse_and_eval('\$pc')) )" \
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"<gdb.Objfile filename=<< JIT compiled code at $hex >>>" \
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"python gdb.Progspace.objfile_for_address"
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}
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}
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}
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# Now unload the jit reader, and ensure that backtracing really
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# doesn't work without it.
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with_test_prefix "without jit-reader" {
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gdb_test_no_output "jit-reader-unload ${jit_reader_bin}" \
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"jit-reader-unload"
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# Check that we're no longer using the JIT unwinder, and that
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# the built-in unwinder cannot backtrace through the mangled
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# stack pointer.
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gdb_test "bt" \
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"Backtrace stopped: Cannot access memory at address $sp_after_mangling" \
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"bt shows error"
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gdb_test "info frame" "Cannot access memory at address.*" \
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"info frame shows error"
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info_registers_current_frame $sp_after_mangling
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gdb_test "up" "Initial frame selected; you cannot go up\\." \
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"cannot go up"
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}
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with_test_prefix "with jit-reader again" {
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gdb_test_no_output "jit-reader-load ${jit_reader_bin}" "jit-reader-load"
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# Check that the jit unwinder manages to backtrace through
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# the mangled stack pointer.
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gdb_test "bt" \
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[multi_line \
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"#0 ${any} in jit_function_stack_mangle ${any}" \
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"#1 ${any} in main ${any}" \
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]
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}
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if {[allow_python_tests]} {
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gdb_test "python print(any(\[not x.is_file for x in gdb.objfiles()\]))" \
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"True" \
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"at least one non-file objfile"
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gdb_test "python print(any(\[x.is_file for x in gdb.objfiles()\]))" \
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"True" \
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"at least one file-based objfile"
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}
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with_test_prefix "test dwarf unwinder" {
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# Check that the DWARF unwinder does not crash in presence of
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# JIT objfiles.
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gdb_test "up"
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gdb_breakpoint "*function_add" temporary
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gdb_test "cont" ".*Temporary breakpoint ${any} in jit_function_add .*"
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gdb_test "bt" \
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[multi_line \
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"#0 ${any} in jit_function_add ${any}" \
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"#1 ${any} in main ${any}" \
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]
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}
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}
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jit_reader_test
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