Add ability to read jit gdb data.
Changes:
- New JitDebug class to handle all of the jit gdb interface.
- Add unit tests for all, along with new offline test using debug data.
- Add new Memory type called MemoryOfflineParts that has multiple
MemoryOffline objects to support the offline test.
- Update the tools to use the JitDebug object.
- Modify libbacktrace to use the JitDebug, but only looking in libart.so
and libartd.so.
- Change the Format32Bits to Is32Bit since it's more accurate and I use
it in a different context where original name didn't make sense.
- Add a new function to find global variables in an elf file
(GetGlobalVariable).
- Add a new function to determine if a pc is valid for this elf (IsValidPc).
Bug: 68396769
Test: Ran new unit tests. Added new offline test that uses jit debug data.
Test: Ran art test that generates jit data and verified a crash unwinds
Test: through the jit data.
Change-Id: I6e7ee2f5bab2242028a06feece156dff21c0a974
diff --git a/libunwindstack/tools/unwind.cpp b/libunwindstack/tools/unwind.cpp
index 81bedb7..07e48af 100644
--- a/libunwindstack/tools/unwind.cpp
+++ b/libunwindstack/tools/unwind.cpp
@@ -27,6 +27,7 @@
#include <unistd.h>
#include <unwindstack/Elf.h>
+#include <unwindstack/JitDebug.h>
#include <unwindstack/Maps.h>
#include <unwindstack/Memory.h>
#include <unwindstack/Regs.h>
@@ -90,6 +91,8 @@
auto process_memory = unwindstack::Memory::CreateProcessMemory(pid);
unwindstack::Unwinder unwinder(128, &remote_maps, regs, process_memory);
+ unwindstack::JitDebug jit_debug(process_memory);
+ unwinder.SetJitDebug(&jit_debug, regs->Arch());
unwinder.Unwind();
// Print the frames.
diff --git a/libunwindstack/tools/unwind_for_offline.cpp b/libunwindstack/tools/unwind_for_offline.cpp
index d64ef8f..74868d4 100644
--- a/libunwindstack/tools/unwind_for_offline.cpp
+++ b/libunwindstack/tools/unwind_for_offline.cpp
@@ -33,6 +33,7 @@
#include <vector>
#include <unwindstack/Elf.h>
+#include <unwindstack/JitDebug.h>
#include <unwindstack/Maps.h>
#include <unwindstack/Memory.h>
#include <unwindstack/Regs.h>
@@ -191,7 +192,9 @@
// elf files are involved.
uint64_t sp = regs->sp();
auto process_memory = unwindstack::Memory::CreateProcessMemory(pid);
+ unwindstack::JitDebug jit_debug(process_memory);
unwindstack::Unwinder unwinder(1024, &maps, regs, process_memory);
+ unwinder.SetJitDebug(&jit_debug, regs->Arch());
unwinder.Unwind();
std::unordered_map<uint64_t, map_info_t> maps_by_start;
@@ -214,6 +217,10 @@
}
}
+ for (size_t i = 0; i < unwinder.NumFrames(); i++) {
+ printf("%s\n", unwinder.FormatFrame(i).c_str());
+ }
+
if (!SaveStack(pid, sp, last_sp)) {
return 1;
}