| commit | 7d01b85c2a0aa8bc91f731cfeb2a7b6885b8d04a | [log] [tgz] |
|---|---|---|
| author | David Spickett <david.spickett@linaro.org> | Fri May 02 12:54:03 2025 +0000 |
| committer | David Spickett <david.spickett@linaro.org> | Fri May 02 13:00:12 2025 +0000 |
| tree | 0cba1e1c61c25e552bd3227247a45356de061a8b | |
| parent | f6ac5276ee364b3b22ce746439e0ce3224dc9091 [diff] |
Reland "[lldb] Do not bump memory modificator ID when "internal" debugger memory is updated (#129092)" This reverts commit daa4061d61216456baa83ab404e096200e327fb4. Original PR https://github.com/llvm/llvm-project/pull/129092. I have restricted the test to X86 Windows because it turns out the only reason that `expr x.get()` would change m_memory_id is that on x86 we have to write the return address to the stack in ABIWindows_X86_64::PrepareTrivialCall: ``` // Save return address onto the stack if (!process_sp->WritePointerToMemory(sp, return_addr, error)) return false; ``` This is not required on AArch64 so m_memory_id was not changed: ``` (lldb) expr x.get() (int) $0 = 0 (lldb) process status -d Process 15316 stopped * thread #1, stop reason = Exception 0x80000003 encountered at address 0x7ff764a31034 frame #0: 0x00007ff764a31038 TestProcessModificationIdOnExpr.cpp.tmp`main at TestProcessModificationIdOnExpr.cpp:35 32 __builtin_debugtrap(); 33 __builtin_debugtrap(); 34 return 0; -> 35 } 36 37 // CHECK-LABEL: process status -d 38 // CHECK: m_stop_id: 2 ProcessModID: m_stop_id: 3 m_last_natural_stop_id: 0 m_resume_id: 0 m_memory_id: 0 ``` Really we should find a better way to force a memory write here, but I can't think of one right now.
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