crash-reporter: Generate kernel crash signatures for server-side grouping of similar crashes

crash_sender

Index: crash_sender
diff --git a/crash_sender b/crash_sender
index 9d34e34b018abe7657393266b2eef2ea030b5e7d..ebb380e805160bdc0c1d3542526467d1717dc728 100644
--- a/crash_sender
+++ b/crash_sender
@@ -201,6 +201,7 @@ send_crash() {
   local hwclass="$(get_hardware_class)"
   local payload_extension="${kind}"
   local write_payload_size="$(get_key_value "${meta_path}" "payload_size")"
+  local sig="$(get_key_value "${meta_path}" "sig")"
   [ "${kind}" = "minidump" ] && payload_extension="dmp"
   local report_payload="$(get_base "${meta_path}").${payload_extension}"
   local send_payload_size="$(stat --printf=%s "${report_payload}")"
@@ -214,6 +215,7 @@ send_crash() {
     lecho "  URL: ${url}"
     lecho "  Board: ${board}"
     lecho "  HWClass: ${hwclass}"
+    [ "${sig}" != "undefined" ] && lecho "  Sig: ${sig}"
   fi
   lecho "  Exec name: ${exec_name}"
   if is_mock; then
@@ -235,6 +237,17 @@ send_crash() {
   local report_id="${TMP_DIR}/report_id"
   local curl_stderr="${TMP_DIR}/curl_stderr"
 
+  local extra_key1="write_payload_size"
+  local extra_value1="${write_payload_size}"
+  local extra_key2="send_payload_size"
+  local extra_value2="${send_payload_size}"
+  if [ "${kind}" = "kcrash" ]; then
+    extra_key1="sig"
+    extra_value1="${sig}"
+    extra_key2="sig2"
+    extra_value2="${sig}"
+  fi
+
   set +e
   curl "${url}" \
     -F "prod=${CHROMEOS_PRODUCT}" \
@@ -243,8 +256,8 @@ send_crash() {
     -F "board=${board}" \
     -F "hwclass=${hwclass}" \
     -F "exec_name=${exec_name}" \
-    -F "write_payload_size=${write_payload_size}" \
-    -F "send_payload_size=${send_payload_size}" \
+    -F "${extra_key1}=${extra_value1}" \
+    -F "${extra_key2}=${extra_value2}" \
     -F "guid=<${CONSENT_ID}" -o "${report_id}" 2>"${curl_stderr}"
   curl_result=$?
   set -e