feat: save Elf BuildId in corefile.

X-Profiler · Oct 19, 2022 · fbfd0b2 · fbfd0b2
1 parent b779aa2
commit fbfd0b2
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/src/platform/unix/core/linux/elfcore.cc b/src/platform/unix/core/linux/elfcore.cc
@@ -944,6 +944,13 @@ static int CreateElfCore(void* handle,
                 mappings[i].end_address - mappings[i].start_address;
           }
 
+          /* We could save the first page of ELF to record the BuildId,
+           * let the debugger later find the corresponding binary it used.
+           */
+          if (!dontdump && (mappings[i].flags & PF_X) != 0) {
+            mappings[i].write_size = pagesize;
+          }
+
           /* Remove mapping, if it was not readable, or completely zero
            * anyway. The former is usually the case of stack guard pages, and
            * the latter occasionally happens for unused memory.