Fix handling of globals for new linker.
The new linker base map is read-only, but the global handling code
for jit and dex information assumed the base map was a read-execute
one. Relax that requirement to search read-only maps.
Adjust the unit tests for this case.
Bug: 117293117
Test: Passes unit tests.
Test: Passes art cfi tests with and without llvm linker.
Change-Id: I31a765d51847d0b8d778ace9cbaa29f42073f4d9
diff --git a/libunwindstack/JitDebug.cpp b/libunwindstack/JitDebug.cpp
index 0c319ec..821aacf 100644
--- a/libunwindstack/JitDebug.cpp
+++ b/libunwindstack/JitDebug.cpp
@@ -174,7 +174,7 @@
const std::string descriptor_name("__jit_debug_descriptor");
for (MapInfo* info : *maps) {
- if (!(info->flags & PROT_EXEC) || !(info->flags & PROT_READ) || info->offset != 0) {
+ if (!(info->flags & PROT_READ) || info->offset != 0) {
continue;
}
@@ -194,10 +194,9 @@
Elf* elf = info->GetElf(memory_, true);
uint64_t descriptor_addr;
- if (elf->GetGlobalVariable(descriptor_name, &descriptor_addr)) {
- // Search for the first non-zero entry.
- descriptor_addr += info->start;
- entry_addr_ = (this->*read_descriptor_func_)(descriptor_addr);
+ // Find first non-empty entry (libart might be loaded multiple times).
+ if (elf->GetGlobalVariable(descriptor_name, &descriptor_addr) && descriptor_addr != 0) {
+ entry_addr_ = (this->*read_descriptor_func_)(descriptor_addr + info->start);
if (entry_addr_ != 0) {
break;
}