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author | ted.mielczarek <ted.mielczarek@4c0a9323-5329-0410-9bdc-e9ce6186880e> | 2010-10-01 13:04:16 +0000 |
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committer | ted.mielczarek <ted.mielczarek@4c0a9323-5329-0410-9bdc-e9ce6186880e> | 2010-10-01 13:04:16 +0000 |
commit | c653618a9175d3252cc6d1aa8c3393f9558646e8 (patch) | |
tree | f615d5446db4025a62bfc3732a78bf4de0440b62 /src/processor/stackwalker_arm_unittest.cc | |
parent | Refactor some bits of StackWalkerX86 / StackFrameX86 out into their respectiv... (diff) | |
download | breakpad-c653618a9175d3252cc6d1aa8c3393f9558646e8.tar.xz |
Add stack-scanning fallback to Stackwalker{AMD64,ARM}.
R=jimb at http://breakpad.appspot.com/206001/show
git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@704 4c0a9323-5329-0410-9bdc-e9ce6186880e
Diffstat (limited to 'src/processor/stackwalker_arm_unittest.cc')
-rw-r--r-- | src/processor/stackwalker_arm_unittest.cc | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/src/processor/stackwalker_arm_unittest.cc b/src/processor/stackwalker_arm_unittest.cc index 22d17d46..ad7aeb31 100644 --- a/src/processor/stackwalker_arm_unittest.cc +++ b/src/processor/stackwalker_arm_unittest.cc @@ -144,6 +144,129 @@ TEST_F(GetContextFrame, Simple) { EXPECT_TRUE(memcmp(&raw_context, &frame->context, sizeof(raw_context)) == 0); } +class GetCallerFrame: public StackwalkerARMFixture, public Test { }; + +TEST_F(GetCallerFrame, ScanWithoutSymbols) { + // When the stack walker resorts to scanning the stack, + // only addresses located within loaded modules are + // considered valid return addresses. + // Force scanning through three frames to ensure that the + // stack pointer is set properly in scan-recovered frames. + stack_section.start() = 0x80000000; + u_int32_t return_address1 = 0x50000100; + u_int32_t return_address2 = 0x50000900; + Label frame1_sp, frame2_sp; + stack_section + // frame 0 + .Append(16, 0) // space + + .D32(0x40090000) // junk that's not + .D32(0x60000000) // a return address + + .D32(return_address1) // actual return address + // frame 1 + .Mark(&frame1_sp) + .Append(16, 0) // space + + .D32(0xF0000000) // more junk + .D32(0x0000000D) + + .D32(return_address2) // actual return address + // frame 2 + .Mark(&frame2_sp) + .Append(32, 0); // end of stack + RegionFromSection(); + + raw_context.iregs[MD_CONTEXT_ARM_REG_PC] = 0x40005510; + raw_context.iregs[MD_CONTEXT_ARM_REG_SP] = stack_section.start().Value(); + + StackwalkerARM walker(&system_info, &raw_context, &stack_region, &modules, + &supplier, &resolver); + ASSERT_TRUE(walker.Walk(&call_stack)); + frames = call_stack.frames(); + ASSERT_EQ(3U, frames->size()); + + StackFrameARM *frame0 = static_cast<StackFrameARM *>(frames->at(0)); + EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); + ASSERT_EQ(StackFrameARM::CONTEXT_VALID_ALL, frame0->context_validity); + EXPECT_TRUE(memcmp(&raw_context, &frame0->context, sizeof(raw_context)) == 0); + + StackFrameARM *frame1 = static_cast<StackFrameARM *>(frames->at(1)); + EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame1->trust); + ASSERT_EQ((StackFrameARM::CONTEXT_VALID_PC | + StackFrameARM::CONTEXT_VALID_SP), + frame1->context_validity); + EXPECT_EQ(return_address1, frame1->context.iregs[MD_CONTEXT_ARM_REG_PC]); + EXPECT_EQ(frame1_sp.Value(), frame1->context.iregs[MD_CONTEXT_ARM_REG_SP]); + + StackFrameARM *frame2 = static_cast<StackFrameARM *>(frames->at(2)); + EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame2->trust); + ASSERT_EQ((StackFrameARM::CONTEXT_VALID_PC | + StackFrameARM::CONTEXT_VALID_SP), + frame2->context_validity); + EXPECT_EQ(return_address2, frame2->context.iregs[MD_CONTEXT_ARM_REG_PC]); + EXPECT_EQ(frame2_sp.Value(), frame2->context.iregs[MD_CONTEXT_ARM_REG_SP]); +} + +TEST_F(GetCallerFrame, ScanWithFunctionSymbols) { + // During stack scanning, if a potential return address + // is located within a loaded module that has symbols, + // it is only considered a valid return address if it + // lies within a function's bounds. + stack_section.start() = 0x80000000; + u_int32_t return_address = 0x50000200; + Label frame1_sp; + + stack_section + // frame 0 + .Append(16, 0) // space + + .D32(0x40090000) // junk that's not + .D32(0x60000000) // a return address + + .D32(0x40001000) // a couple of plausible addresses + .D32(0x5000F000) // that are not within functions + + .D32(return_address) // actual return address + // frame 1 + .Mark(&frame1_sp) + .Append(32, 0); // end of stack + RegionFromSection(); + + raw_context.iregs[MD_CONTEXT_ARM_REG_PC] = 0x40000200; + raw_context.iregs[MD_CONTEXT_ARM_REG_SP] = stack_section.start().Value(); + + SetModuleSymbols(&module1, + // The youngest frame's function. + "FUNC 100 400 10 monotreme\n"); + SetModuleSymbols(&module2, + // The calling frame's function. + "FUNC 100 400 10 marsupial\n"); + + StackwalkerARM walker(&system_info, &raw_context, &stack_region, &modules, + &supplier, &resolver); + ASSERT_TRUE(walker.Walk(&call_stack)); + frames = call_stack.frames(); + ASSERT_EQ(2U, frames->size()); + + StackFrameARM *frame0 = static_cast<StackFrameARM *>(frames->at(0)); + EXPECT_EQ(StackFrame::FRAME_TRUST_CONTEXT, frame0->trust); + ASSERT_EQ(StackFrameARM::CONTEXT_VALID_ALL, frame0->context_validity); + EXPECT_TRUE(memcmp(&raw_context, &frame0->context, sizeof(raw_context)) == 0); + EXPECT_EQ("monotreme", frame0->function_name); + EXPECT_EQ(0x40000100, frame0->function_base); + + StackFrameARM *frame1 = static_cast<StackFrameARM *>(frames->at(1)); + EXPECT_EQ(StackFrame::FRAME_TRUST_SCAN, frame1->trust); + ASSERT_EQ((StackFrameARM::CONTEXT_VALID_PC | + StackFrameARM::CONTEXT_VALID_SP), + frame1->context_validity); + EXPECT_EQ(return_address, frame1->context.iregs[MD_CONTEXT_ARM_REG_PC]); + EXPECT_EQ(frame1_sp.Value(), frame1->context.iregs[MD_CONTEXT_ARM_REG_SP]); + EXPECT_EQ("marsupial", frame1->function_name); + EXPECT_EQ(0x50000100, frame1->function_base); +} + struct CFIFixture: public StackwalkerARMFixture { CFIFixture() { // Provide a bunch of STACK CFI records; we'll walk to the caller |