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gdb/testsuite: add (and use) a new build-id compile option

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I noticed that the gdb.debuginfod/fetch_src_and_symbols.exp test was
failing when run with Clang as the compiler.

This test relies on the compiled binaries having a build-id within
them.  For GCC, really GNU ld, the default is to always include a
build-id.

When compiling with Clang though, the default is for no build-id.

I did consider *always* turning on the build-id feature when the
compiler is Clang, but that felt a little weird.

Instead, I propose that we add a new 'build-id' compiler option to
gdb_compile, this flag indicates that the test _requires_ a build-id.
In gcc_compile we can then add the required flags if the compiler is
Clang so that we do get a build-id.

With this change the gdb.debuginfod/fetch_src_and_symbols.exp test
now (mostly) passes with Clang 9.0.1 and 15.0.2, and still passes with
gcc.  The 'mostly' part is an unrelated issue, and will be addressed
in a later commit in this series.

Reviewed-By: Lancelot SIX <lancelot.six@amd.com>
This commit is contained in:
Andrew Burgess
2022-11-11 15:51:34 +00:00
parent ed64647b7f
commit f2509beef8
2 changed files with 11 additions and 2 deletions
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4
gdb/testsuite/gdb.debuginfod/fetch_src_and_symbols.exp
View File

@ -32,12 +32,12 @@ if { [catch {file copy -force ${srcdir}/${subdir}/${srcfile} \
return -1 return -1
} }
if { [gdb_compile "$sourcetmp" "$binfile" executable {debug}] != "" } { if { [gdb_compile "$sourcetmp" "$binfile" executable {debug build-id}] != "" } {
untested "failed to compile" untested "failed to compile"
return -1 return -1
} }
if { [gdb_compile "$sourcetmp" "${binfile}2" executable {debug}] != "" } { if { [gdb_compile "$sourcetmp" "${binfile}2" executable {debug build-id}] != "" } {
fail "compile" fail "compile"
return -1 return -1
} }

9
gdb/testsuite/lib/gdb.exp
View File

@ -4685,6 +4685,7 @@ set gdb_saved_set_unbuffered_mode_obj ""
# - macros: Add the required compiler flag to include macro information in # - macros: Add the required compiler flag to include macro information in
# debug information # debug information
# - text_segment=addr: Tell the linker to place the text segment at ADDR. # - text_segment=addr: Tell the linker to place the text segment at ADDR.
# - build-id: Ensure the final binary includes a build-id.
# #
# And here are some of the not too obscure options understood by DejaGnu that # And here are some of the not too obscure options understood by DejaGnu that
# influence the compilation: # influence the compilation:
@ -4747,6 +4748,14 @@ proc gdb_compile {source dest type options} {
} }
} }
# If the 'build-id' option is used, then ensure that we generate a
# build-id. GCC does this by default, but Clang does not, so
# enable it now.
if {[lsearch -exact $options build-id] > 0
&& [test_compiler_info "clang-*"]} {
lappend new_options "additional_flags=-Wl,--build-id"
}
# Treating .c input files as C++ is deprecated in Clang, so # Treating .c input files as C++ is deprecated in Clang, so
# explicitly force C++ language. # explicitly force C++ language.
if { !$getting_compiler_info if { !$getting_compiler_info