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/tests/ElfTest.cpp b/libunwindstack/tests/ElfTest.cpp
index 5e808ef..7e6a62a 100644
--- a/libunwindstack/tests/ElfTest.cpp
+++ b/libunwindstack/tests/ElfTest.cpp
@@ -346,7 +346,14 @@
void InitHeaders() override {}
bool GetSoname(std::string*) override { return false; }
bool GetFunctionName(uint64_t, uint64_t, std::string*, uint64_t*) override { return false; }
+
MOCK_METHOD5(Step, bool(uint64_t, uint64_t, Regs*, Memory*, bool*));
+ MOCK_METHOD2(GetGlobalVariable, bool(const std::string&, uint64_t*));
+ MOCK_METHOD1(IsValidPc, bool(uint64_t));
+
+ void MockSetDynamicOffset(uint64_t offset) { dynamic_offset_ = offset; }
+ void MockSetDynamicVaddr(uint64_t vaddr) { dynamic_vaddr_ = vaddr; }
+ void MockSetDynamicSize(uint64_t size) { dynamic_size_ = size; }
};
TEST_F(ElfTest, step_in_interface) {
@@ -378,14 +385,200 @@
elf.FakeSetInterface(interface);
MemoryFake process_memory;
- // Invalid relative pc given load_bias.
bool finished;
- ASSERT_FALSE(elf.Step(0x1004, 0x1000, 0x2000, ®s, &process_memory, &finished));
-
EXPECT_CALL(*interface, Step(0x7300, 0x4000, ®s, &process_memory, &finished))
.WillOnce(::testing::Return(true));
ASSERT_TRUE(elf.Step(0x7304, 0x7300, 0x2000, ®s, &process_memory, &finished));
}
+TEST_F(ElfTest, get_global_invalid_elf) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(false);
+
+ std::string global("something");
+ uint64_t offset;
+ ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
+}
+
+TEST_F(ElfTest, get_global_valid_not_in_interface) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetInterface(interface);
+
+ uint64_t offset;
+ std::string global("something");
+ EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));
+
+ ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
+}
+
+TEST_F(ElfTest, get_global_valid_below_load_bias) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0x1000);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetInterface(interface);
+
+ uint64_t offset;
+ std::string global("something");
+ EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
+ .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));
+
+ ASSERT_FALSE(elf.GetGlobalVariable(global, &offset));
+}
+
+TEST_F(ElfTest, get_global_valid_dynamic_zero) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetInterface(interface);
+
+ ElfInterfaceMock* gnu_interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetGnuDebugdataInterface(gnu_interface);
+
+ uint64_t offset;
+ std::string global("something");
+ EXPECT_CALL(*interface, GetGlobalVariable(global, &offset)).WillOnce(::testing::Return(false));
+
+ EXPECT_CALL(*gnu_interface, GetGlobalVariable(global, &offset))
+ .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x500), ::testing::Return(true)));
+
+ ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
+ EXPECT_EQ(0x500U, offset);
+}
+
+TEST_F(ElfTest, get_global_valid_in_gnu_debugdata_dynamic_zero) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetInterface(interface);
+
+ uint64_t offset;
+ std::string global("something");
+ EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
+ .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));
+
+ ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
+ EXPECT_EQ(0x300U, offset);
+}
+
+TEST_F(ElfTest, get_global_valid_dynamic_zero_non_zero_load_bias) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0x100);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetInterface(interface);
+
+ uint64_t offset;
+ std::string global("something");
+ EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
+ .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x300), ::testing::Return(true)));
+
+ ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
+ EXPECT_EQ(0x200U, offset);
+}
+
+TEST_F(ElfTest, get_global_valid_dynamic_adjust_negative) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ interface->MockSetDynamicOffset(0x400);
+ interface->MockSetDynamicVaddr(0x800);
+ interface->MockSetDynamicSize(0x100);
+ elf.FakeSetInterface(interface);
+
+ uint64_t offset;
+ std::string global("something");
+ EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
+ .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));
+
+ ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
+ EXPECT_EQ(0x450U, offset);
+}
+
+TEST_F(ElfTest, get_global_valid_dynamic_adjust_positive) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ interface->MockSetDynamicOffset(0x1000);
+ interface->MockSetDynamicVaddr(0x800);
+ interface->MockSetDynamicSize(0x100);
+ elf.FakeSetInterface(interface);
+
+ uint64_t offset;
+ std::string global("something");
+ EXPECT_CALL(*interface, GetGlobalVariable(global, &offset))
+ .WillOnce(::testing::DoAll(::testing::SetArgPointee<1>(0x850), ::testing::Return(true)));
+
+ ASSERT_TRUE(elf.GetGlobalVariable(global, &offset));
+ EXPECT_EQ(0x1050U, offset);
+}
+
+TEST_F(ElfTest, is_valid_pc_elf_invalid) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(false);
+ elf.FakeSetLoadBias(0);
+
+ EXPECT_FALSE(elf.IsValidPc(0x100));
+ EXPECT_FALSE(elf.IsValidPc(0x200));
+}
+
+TEST_F(ElfTest, is_valid_pc_interface) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetInterface(interface);
+
+ EXPECT_CALL(*interface, IsValidPc(0x1500)).WillOnce(::testing::Return(true));
+
+ EXPECT_TRUE(elf.IsValidPc(0x1500));
+}
+
+TEST_F(ElfTest, is_valid_pc_non_zero_load_bias) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0x1000);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetInterface(interface);
+
+ EXPECT_CALL(*interface, IsValidPc(0x500)).WillOnce(::testing::Return(true));
+
+ EXPECT_FALSE(elf.IsValidPc(0x100));
+ EXPECT_FALSE(elf.IsValidPc(0x200));
+ EXPECT_TRUE(elf.IsValidPc(0x1500));
+}
+
+TEST_F(ElfTest, is_valid_pc_from_gnu_debugdata) {
+ ElfFake elf(memory_);
+ elf.FakeSetValid(true);
+ elf.FakeSetLoadBias(0);
+
+ ElfInterfaceMock* interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetInterface(interface);
+ ElfInterfaceMock* gnu_interface = new ElfInterfaceMock(memory_);
+ elf.FakeSetGnuDebugdataInterface(gnu_interface);
+
+ EXPECT_CALL(*interface, IsValidPc(0x1500)).WillOnce(::testing::Return(false));
+ EXPECT_CALL(*gnu_interface, IsValidPc(0x1500)).WillOnce(::testing::Return(true));
+
+ EXPECT_TRUE(elf.IsValidPc(0x1500));
+}
+
} // namespace unwindstack