diff options
Diffstat (limited to 'gdb/testsuite/gdb.base/nostdlib.exp')
| -rw-r--r-- | gdb/testsuite/gdb.base/nostdlib.exp | 91 |
1 files changed, 66 insertions, 25 deletions
diff --git a/gdb/testsuite/gdb.base/nostdlib.exp b/gdb/testsuite/gdb.base/nostdlib.exp index 906e627..ecf09a8 100644 --- a/gdb/testsuite/gdb.base/nostdlib.exp +++ b/gdb/testsuite/gdb.base/nostdlib.exp @@ -1,4 +1,4 @@ -# Copyright 2010-2024 Free Software Foundation, Inc. +# Copyright 2010-2025 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 @@ -24,33 +24,74 @@ require !use_gdb_stub # dependent on whether the system libraries are already prelinked. # prelink: Could not set /lib64/libm-2.11.1.so owner or mode: Operation not permitted set compile { - gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug additional_flags=-nostdlib} -} -set board [target_info name] -if [board_info $board exists mathlib] { - set mathlib [board_info $dest mathlib] - set_board_info mathlib "" - set err [eval $compile] - set_board_info mathlib $mathlib -} else { - set_board_info mathlib "" - set err [eval $compile] - unset_board_info mathlib -} -if {$err != ""} { - untested "failed to compile" - return -1 + gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable $opts } -clean_restart $binfile +foreach_with_prefix pie { "nopie" "pie" } { + # OPTS and BINFILE are used by the COMPILE string (defined above) + # when it is evaluated below. + set opts [list debug additional_flags=-nostdlib $pie] + set binfile [standard_output_file $testfile-$pie] + + set board [target_info name] + if [board_info $board exists mathlib] { + set mathlib [board_info $dest mathlib] + set_board_info mathlib "" + set err [eval $compile] + set_board_info mathlib $mathlib + } else { + set_board_info mathlib "" + set err [eval $compile] + unset_board_info mathlib + } + if {$err != ""} { + untested "failed to compile" + return -1 + } + + clean_restart $binfile -gdb_breakpoint "*marker" -gdb_breakpoint "*_start" + gdb_breakpoint "*marker" -gdb_run_cmd + # Say we set a permanent breakpoint on *_start. When setting the + # breakpoint, it will resolve to _start in the exec. + # After starting to run, that may stay the same, and consequently + # execution will stop there. + # OTOH, after starting to run, that may change to *_start in the dynamic + # linker, and consequently execution will stop there. + # There's currently no way to enforce one or the other (PR32748). + # + # Say we run into a stop in *_start in the dynamic linker. Continuing + # from this situation, the dynamic linker is reported as unloaded, which + # makes the breakpoint resolve again to *_start in the exec, and + # consequently execution will stop there as well. + # + # However, we cannot rely on this behavior either. Reporting the dynamic + # linker as unloaded is a GLIBC bug, which may get fixed eventually. + # + # Instead of trying to cater for all these possibilities in a controlled + # fashion, make the breakpoint temporary, ensuring that there will just be + # one stop. + gdb_breakpoint "*_start" temporary -# Breakpoint 2, Stopped due to shared library event -# _start () at ./gdb.base/nostdlib.c:20 -gdb_test "" {Breakpoint [0-9]+, .*_start .*} "stop at run" + gdb_run_cmd -gdb_test "continue" {Breakpoint [0-9]+, marker .*} "continue to marker" + # Breakpoint 2, Stopped due to shared library event + # _start () at ./gdb.base/nostdlib.c:20 + gdb_test "" {Temporary breakpoint [0-9]+, .*_start .*} "stop at run" + + gdb_test "continue" {Breakpoint [0-9]+, marker .*} "continue to marker" + + # When compiling as PIE the executable will be a dynamic + # executable, the dynamic linker performs the PIE relocation. + # Some versions of glibc would (possibly due to a bug) report the + # dynamic linker as unmapped during startup, which places the + # 'shlib event' breakpoint(s) into the PENDING state. + # + # At one point trying to print these internal breakpoints in a + # PENDING state would crash GDB, so lets make sure that doesn't + # happen now. We don't really care about the exact output, + # gdb_test will spot if running this command crashes GDB, which is + # all we're really checking for. + gdb_test "maint info breakpoints" ".*" +} |