Add a human readable description of the tagged_addr_ctrl value to tombstones.

Change-Id: Ib9860b282cf749891e0f6ef7697669b94235c236

1 files changed, 28 insertions, 0 deletions

diff --git a/debuggerd/libdebuggerd/utility.cpp b/debuggerd/libdebuggerd/utility.cpp
index a7506b7608..3c4c271495 100644
--- a/debuggerd/libdebuggerd/utility.cpp
+++ b/debuggerd/libdebuggerd/utility.cpp
@@ -41,6 +41,7 @@
 #include <unwindstack/Memory.h>
 #include <unwindstack/Unwinder.h>
 
+using android::base::StringPrintf;
 using android::base::unique_fd;
 
 bool is_allowed_in_logcat(enum logtype ltype) {
@@ -444,6 +445,33 @@ const char* get_sigcode(const siginfo_t* si) {
   return "?";
 }
 
+std::string describe_tagged_addr_ctrl(long ctrl) {
+  std::string desc;
+  if (ctrl & PR_TAGGED_ADDR_ENABLE) {
+    desc += ", PR_TAGGED_ADDR_ENABLE";
+    ctrl &= ~PR_TAGGED_ADDR_ENABLE;
+  }
+  if (ctrl & PR_MTE_TCF_SYNC) {
+    desc += ", PR_MTE_TCF_SYNC";
+    ctrl &= ~PR_MTE_TCF_SYNC;
+  }
+  if (ctrl & PR_MTE_TCF_ASYNC) {
+    desc += ", PR_MTE_TCF_ASYNC";
+    ctrl &= ~PR_MTE_TCF_ASYNC;
+  }
+  if (ctrl & PR_MTE_TAG_MASK) {
+    desc += StringPrintf(", mask 0x%04lx", (ctrl & PR_MTE_TAG_MASK) >> PR_MTE_TAG_SHIFT);
+    ctrl &= ~PR_MTE_TAG_MASK;
+  }
+  if (ctrl) {
+    desc += StringPrintf(", unknown 0x%lx", ctrl);
+  }
+  if (desc.empty()) {
+    return "";
+  }
+  return " (" + desc.substr(2) + ")";
+}
+
 void log_backtrace(log_t* log, unwindstack::Unwinder* unwinder, const char* prefix) {
   if (unwinder->elf_from_memory_not_file()) {
     _LOG(log, logtype::BACKTRACE,