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Final fixes for cortex m unwind api test #11627

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Merged
merged 3 commits into from
Oct 14, 2025
Merged

Final fixes for cortex m unwind api test #11627

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79a752f
[lldb] Cortex-M exception unwind API test cleanup
jasonmolenda Oct 10, 2025
aab4ee4
[lldb][API test] TestCortexMExceptionUnwind needs ARM llvm target
jasonmolenda Oct 13, 2025
39dd4d3
[lldb] Remove obsolete comment in TestCortexMExceptionUnwind
jasonmolenda Oct 14, 2025
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4 changes: 2 additions & 2 deletions lldb/test/API/functionalities/unwind/cortex-m-exception/TestCortexMExceptionUnwind.py
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Original file line number Diff line number Diff line change
Expand Up @@ -11,6 +11,7 @@
class TestCortexMExceptionUnwind(TestBase):
NO_DEBUG_INFO_TESTCASE = True

@skipIfLLVMTargetMissing("ARM")
def test_no_fpu(self):
"""Test that we can backtrace correctly through an ARM Cortex-M Exception return stack"""

Expand Down Expand Up @@ -38,9 +39,8 @@ def test_no_fpu(self):
thread = process.GetThreadAtIndex(0)
self.assertTrue(thread.IsValid())

self.assertEqual(thread.GetNumFrames(), 6)
self.assertEqual(thread.GetNumFrames(), 3)
stackframe_names = [
"exception_catcher",
"exception_catcher",
"exception_thrower",
"main",
Expand Down
29 changes: 26 additions & 3 deletions lldb/test/API/functionalities/unwind/cortex-m-exception/armv7m-nofpu-exception.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -2,8 +2,8 @@ cpu: armv7m
threads:
- regsets:
- flavor: gpr
registers: [{name: sp, value: 0x2000fe70}, {name: r7, value: 0x2000fe80},
{name: pc, value: 0x0020392c}, {name: lr, value: 0x0020392d}]
registers: [{name: sp, value: 0x2000fe88}, {name: r7, value: 0x2000fe88},
{name: pc, value: 0x00203916}, {name: lr, value: 0x0020392d}]
memory-regions:
# stack memory fetched via
# (lldb) p/x $sp
Expand All @@ -14,7 +14,7 @@ memory-regions:
0x0000002a, 0x20010e58, 0x00203923, 0x00000001,
0x2000fe88, 0x00203911, 0x2000ffdc, 0xfffffff9,
0x00000102, 0x00000002, 0x000003f0, 0x0000002a,
0x20012620, 0x00203215, 0x00203366, 0x81000200,
0x20012620, 0x00203215, 0x00202a92, 0x81000200,
0x00203215, 0x200128b0, 0x0024928d, 0x2000fecc,
0x002491ed, 0x20010e58, 0x20010e4c, 0x2000ffa0,
0x200107a0, 0x0000003c, 0x200116e8, 0x200108b0,
Expand Down Expand Up @@ -62,3 +62,26 @@ memory-regions:
0x98, 0xae, 0x28, 0x00
]

# exception_thrower
# (lldb) disass -b -c 12 -n exception_thrower
# 0x202a88 <+0>: 0xb5f0 push {r4, r5, r6, r7, lr}
# 0x202a8a <+2>: 0xaf03 add r7, sp, #0xc
# 0x202a8c <+4>: 0xe92d0f00 push.w {r8, r9, r10, r11}
# 0x202a90 <+8>: 0xb0c3 sub sp, #0x10c
# 0x202a92 <+10>: 0xf7ffffd9 bl 0x202a48
- addr: 0x202a88
UInt8: [
0xf0, 0xb5, 0x03, 0xaf, 0x2d, 0xe9, 0x00, 0x0f,
0xc3, 0xb0, 0xff, 0xf7, 0xd9, 0xff, 0xff, 0xf7
]

# main:
# 0x202a7e <+0>: push {r7, lr}
# 0x202a80 <+2>: mov r7, sp
# 0x202a82 <+4>: bl 0x202a88 ; exception_thrower
# 0x202a86 <+8>: nop
- addr: 0x202a7e
UInt8: [
0x80, 0xb5, 0x6f, 0x46, 0x00, 0xf0, 0x01, 0xf8,
0x00, 0xbf
]
6 changes: 3 additions & 3 deletions lldb/test/API/functionalities/unwind/cortex-m-exception/binary.json
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@@ -1,5 +1,5 @@
{
"triple": "armv7m-apple",
"triple": "armv7m--",
"uuid": "2D157DBA-53C9-3AC7-B5A1-9D336EC831CB",
"type": "executable",
"sections": [
Expand Down Expand Up @@ -28,13 +28,13 @@
{
"name": "exception_catcher",
"type": "code",
"size": 44,
"size": 32,
"address": 2111760
},
{
"name": "exception_thrower",
"type": "code",
"size": 2652,
"size": 16,
"address": 2108040
}
]
Expand Down