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Don't generate symbols for files that dump_syms can't handle.

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dump_syms can only dump the symbols of an executable with the same ELF
format as itself.  Some recent build configurations now have binaries with
differing ELF formats.  For example, issue 25468 has a 64-bit kernel where
everything else is 32-bit, and issue 25466 indicates there's a test that
contains a 32-bit executable.

BUG=chromium-os:25496, chromium-os:25468, chromium-os:25466
TEST=Ran cros_generate_breakpad_symbols on 32/64-bit executables

Change-Id: I15f5115585b3ed54ca7ae7b631216285baef8580
Reviewed-on: https://gerrit.chromium.org/gerrit/14835
Tested-by: Michael Krebs <mkrebs@chromium.org>
Reviewed-by: David James <davidjames@chromium.org>
Commit-Ready: Michael Krebs <mkrebs@chromium.org>
This commit is contained in:
Michael Krebs 2012-01-25 15:50:14 -08:00 committed by Gerrit
parent 84f66f5864
commit 104d20d8ea
1 changed files with 22 additions and 13 deletions
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35
cros_generate_breakpad_symbols
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@ -67,21 +67,26 @@ function get_debug_for_text() {
echo ${debug_path}
}
# Verify the file given is not a 64-bit ELF file. For now all targets
# are 32-bit, we'll need to determine the correct bit automatically
# once we release 64-bit versions. Allow files in /usr/lib64 to exist
# on the image and only give warnings.
function verify_not_64b_elf() {
# Returns true if the file given is a 64-bit ELF file.
function is_64b_elf() {
local elf="$1"
if file "${elf}" | grep -q "ELF 64-bit"; then
# Allow with a warning if in /usr/lib64
if echo "${elf}" | grep -q /usr/lib64; then
warn "64-bit usr/lib64 file ${elf} ignored."
else
error "File ${elf} is a 64b executable"
ANY_ERRORS=1
file "${elf}" | grep -q "ELF 64-bit"
}
# Verify the file given is an ELF file that dump_syms can handle. A 32-bit
# dump_syms cannot dump a 64-bit ELF file, and vice versa.
function verify_not_mismatched_elf() {
local elf="$1"
if [ ${DUMP_SYMS_IS_64BIT} -ne 0 ]; then
if ! is_64b_elf "${elf}"; then
warn "Not dumping symbols for file ${elf} because it is not 64-bit"
return 1
fi
else
if is_64b_elf "${elf}"; then
warn "Not dumping symbols for file ${elf} because it is 64-bit"
return 1
fi
return 1
fi
return 0
}
@ -93,6 +98,8 @@ function dump_file() {
local debug_file="$1"
local text_file="$2"
local debug_directory="$(dirname "${debug_file}")"
# 32-bit dump_syms cannot dump a 64-bit ELF file, and vice versa
verify_not_mismatched_elf "${text_file}" || return 1
# Dump symbols as root in order to read all files.
if ! sudo "${DUMP_SYMS}" "${text_file}" "${debug_directory}" > "${SYM_FILE}" \
2> "${ERR_FILE}"; then
@ -177,9 +184,11 @@ function main() {
amd64)
echo "Detected amd64 board.."
DUMP_SYMS="/build/${FLAGS_board}/usr/bin/dump_syms"
DUMP_SYMS_IS_64BIT=1
;;
*)
DUMP_SYMS="dump_syms"
DUMP_SYMS_IS_64BIT=0
esac
echo "Using dump_sys: $DUMP_SYMS"