Add indicator that an elf is memory backed.
Modify the unwinder library to indicate that at least one of the stack
frames contains an elf file that is unreadable.
Modify debuggerd to display a note about the unreadable frame and a possible
way to fix it.
Bug: 129769339
Test: New unit tests pass.
Test: Ran an app that crashes and has an unreadable file and verified the
Test: message is displayed. Then setenforce 0 and verify the message is
Test: not displayed.
Change-Id: Ibc4fe1d117e9b5840290454e90914ddc698d3cc2
diff --git a/libunwindstack/Unwinder.cpp b/libunwindstack/Unwinder.cpp
index f3d2b5e..26626b5 100644
--- a/libunwindstack/Unwinder.cpp
+++ b/libunwindstack/Unwinder.cpp
@@ -141,6 +141,7 @@
frames_.clear();
last_error_.code = ERROR_NONE;
last_error_.address = 0;
+ elf_from_memory_not_file_ = false;
ArchEnum arch = regs_->Arch();
@@ -164,6 +165,12 @@
break;
}
elf = map_info->GetElf(process_memory_, arch);
+ // If this elf is memory backed, and there is a valid file, then set
+ // an indicator that we couldn't open the file.
+ if (!elf_from_memory_not_file_ && map_info->memory_backed_elf && !map_info->name.empty() &&
+ map_info->name[0] != '[') {
+ elf_from_memory_not_file_ = true;
+ }
step_pc = regs_->pc();
rel_pc = elf->GetRelPc(step_pc, map_info);
// Everyone except elf data in gdb jit debug maps uses the relative pc.