From 777a42f1f86b60d11cfe0e5964036823e6920f79 Mon Sep 17 00:00:00 2001 From: Pedro Alves Date: Mon, 9 Oct 2017 18:11:02 +0100 Subject: [PATCH] gdb.multi/multi-arch-exec.exp: Also test -m32 => -m64 The gdb.multi/multi-arch-exec.exp testcase currently tests execing from -m64 to -m32, but does not test the other direction. For thoroughness, this commit fixes that. Without the fix in the previous commit for example ("Multi-arch exec, more register reading avoidance"), on x86_64 we would get different symptoms depending on "execing direction". Vis: Continuing. Truncated register 50 in remote 'g' packet Truncated register 50 in remote 'g' packet (gdb) FAIL: gdb.multi/multi-arch-exec.exp: first_arch=1: selected_thread=2: follow_exec_mode=same: continue across exec that changes architecture Vs: Continuing. Remote 'g' packet reply is too long (expected 440 bytes, got 816 bytes): daffffffffffffff0000[snip] Remote 'g' packet reply is too long (expected 440 bytes, got 816 bytes): daffffffffffffff0000[snip] (gdb) FAIL: gdb.multi/multi-arch-exec.exp: first_arch=2: selected_thread=2: follow_exec_mode=same: continue across exec that changes architecture gdb/testsuite/ChangeLog: 2017-10-09 Pedro Alves Test both arch1=>arch2 and arch2=>arch1. * gdb.multi/multi-arch-exec.exp (exec1, srcfile1, binfile1, exec2) (srcfile2, binfile2, march1, march2): Remove globals. Largely factored out to... (append_arch1_options, append_arch2_options, append_arch_options) (build_executables): New procedures. (do_test): New 'first_arch' parameter. Use it to define 'from_exec' local. (top level): Add new 'first_arch' testing axis. --- gdb/testsuite/ChangeLog | 13 ++ gdb/testsuite/gdb.multi/multi-arch-exec.exp | 174 ++++++++++++++------ 2 files changed, 138 insertions(+), 49 deletions(-) diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog index e7b63ff2ab..345ec972d9 100644 --- a/gdb/testsuite/ChangeLog +++ b/gdb/testsuite/ChangeLog @@ -1,3 +1,16 @@ +2017-10-09 Pedro Alves + + Test both arch1=>arch2 and arch2=>arch1. + + * gdb.multi/multi-arch-exec.exp (exec1, srcfile1, binfile1, exec2) + (srcfile2, binfile2, march1, march2): Remove globals. Largely + factored out to... + (append_arch1_options, append_arch2_options, append_arch_options) + (build_executables): New procedures. + (do_test): New 'first_arch' parameter. Use it to define 'from_exec' + local. + (top level): Add new 'first_arch' testing axis. + 2017-10-09 Pedro Alves * gdb.multi/multi-arch-exec.c: Include and . diff --git a/gdb/testsuite/gdb.multi/multi-arch-exec.exp b/gdb/testsuite/gdb.multi/multi-arch-exec.exp index 3196cf3f3a..53e12807da 100644 --- a/gdb/testsuite/gdb.multi/multi-arch-exec.exp +++ b/gdb/testsuite/gdb.multi/multi-arch-exec.exp @@ -29,57 +29,126 @@ if [istarget "i?86-*linux*"] { return } -# Can't use standard_testfile, we want executables with specialized -# names. -set exec1 "multi-arch-exec" -set srcfile1 multi-arch-exec.c -set binfile1 [standard_output_file ${exec1}] +# The testcase builds two programs, each of its own architecture. For +# example, one built with -m64, another with -m32. The exact compiler +# options depends on target triplet. We generically refer to the +# architectures simply as 'architecture 1' and 'architecture 2'. Each +# program is actually built twice, once for each architecture, because +# we test both execing from arch1 to arch2 and from arch2 to arch1. +# The architecture of the executable that execs is encoded in the +# binaries' names, like so: +# +# $first_arch-multi-arch-exec # execing program +# $first_arch-multi-arch-exec-hello # execed program -set exec2 "multi-arch-exec-hello" -set srcfile2 hello.c -set binfile2 [standard_output_file ${exec2}] +# Append the options necessary to build a program for architecture 1 +# to the OPTIONS_VAR list. -# Build two executables, one for each arch. +proc append_arch1_options {options_var} { + upvar 1 $options_var options -if [istarget "s390*-*-*"] { - set march1 "-m64" - set march2 "-m31" -} elseif { [istarget "aarch64*-*-*"] } { - set march1 "" - set march2 "" -} else { - set march1 "-m64" - set march2 "-m32" -} - -if { [prepare_for_testing "failed to prepare" ${exec1} "${srcfile1}" \ - [list debug pthreads \ - additional_flags=${march1}]] } { - return -1 -} - -set options [list debug] - -if { [istarget "aarch64*-*-*"] } { - if {[info exists ARM_CC_FOR_TARGET]} { - lappend options "compiler=${ARM_CC_FOR_TARGET}" - } else { - unsupported "ARM compiler is not known" - return -1 + if { [istarget "aarch64*-*-*"] } { + return 1 } -} else { - lappend options "additional_flags=${march2}" + + lappend options "additional_flags=-m64" + return 1 } -if { [prepare_for_testing "failed to prepare" ${exec2} "${srcfile2}" \ - $options] } { - return -1 +# Append the options necessary to build a program for architecture 2 +# to the OPTIONS_VAR list. + +proc append_arch2_options {options_var} { + upvar 1 $options_var options + + if { [istarget "aarch64*-*-*"] } { + if {[info exists ARM_CC_FOR_TARGET]} { + lappend options "compiler=${ARM_CC_FOR_TARGET}" + return 1 + } else { + unsupported "ARM compiler is not known" + return 0 + } + } + + if [istarget "s390*-*-*"] { + set march "-m31" + } else { + set march "-m32" + } + lappend options "additional_flags=${march}" + return 1 } -proc do_test { mode selected_thread } { - global exec1 +# Append the options necessary to build a program for architecture +# ARCH to the OPTIONS_VAR list. Returns true on success. - clean_restart ${exec1} +proc append_arch_options {arch options_var} { + upvar 1 $options_var options + + if {$arch == 1} { + return [append_arch1_options options] + } elseif {$arch == 2} { + return [append_arch2_options options] + } else { + error "unhandled architecture: $arch" + } +} + +# Build the executables for testing with FIRST_ARCH (either 1 or 2) as +# the architecture before the exec. Returns true on success. + +proc build_executables { first_arch } { + + # Can't use standard_testfile, we want executables with specialized + # names. + set from_exec "$first_arch-multi-arch-exec" + set from_srcfile multi-arch-exec.c + set from_binfile [standard_output_file ${from_exec}] + + set to_exec "$first_arch-multi-arch-exec-hello" + set to_srcfile hello.c + set to_binfile [standard_output_file ${to_exec}] + + # Build two executables, one for each arch. + + if {$first_arch == 1} { + set from_arch 1 + set to_arch 2 + } elseif {$first_arch == 2} { + set from_arch 2 + set to_arch 1 + } else { + error "unhandled first architecture: $first_arch" + } + + set from_options [list debug pthreads] + if {![append_arch_options $from_arch from_options]} { + return 0 + } + + if { [build_executable "failed to prepare" ${from_exec} "${from_srcfile}" \ + $from_options] } { + return 0 + } + + set to_options [list debug] + if {![append_arch_options $to_arch to_options]} { + return 0 + } + + if { [build_executable "failed to prepare" ${to_exec} "${to_srcfile}" \ + $to_options] } { + return 0 + } + + return 1 +} + +proc do_test { first_arch mode selected_thread } { + set from_exec "$first_arch-multi-arch-exec" + + clean_restart ${from_exec} if ![runto all_started] then { fail "couldn't run to all_started" return -1 @@ -102,12 +171,19 @@ proc do_test { mode selected_thread } { gdb_test "continue" "Breakpoint 2, main.*" "continue across exec that changes architecture" } -# Test handling the exec event with either the main thread or the -# second thread selected. This tries to ensure that GDB doesn't read -# registers off of the execing thread before figuring out its -# architecture. -foreach_with_prefix selected_thread {1 2} { - foreach_with_prefix follow_exec_mode {"same" "new"} { - do_test $follow_exec_mode $selected_thread +# Test both arch1=>arch2 and arch2=>arch1. +foreach_with_prefix first_arch {1 2} { + if {![build_executables $first_arch]} { + continue + } + + # Test handling the exec event with either the main thread or the + # second thread selected. This tries to ensure that GDB doesn't read + # registers off of the execing thread before figuring out its + # architecture. + foreach_with_prefix selected_thread {1 2} { + foreach_with_prefix follow_exec_mode {"same" "new"} { + do_test $first_arch $follow_exec_mode $selected_thread + } } }