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gh-131591: Add remote debugging attachment protocol documentation #132638

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Merged
pablogsal merged 4 commits into from
Apr 21, 2025
Merged

gh-131591: Add remote debugging attachment protocol documentation #132638

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34c64f1
gh-131591: Add remote debugging attachment protocol documentation
Apr 17, 2025
bb9d85d
fixup! gh-131591: Add remote debugging attachment protocol documentation
ivonastojanovic Apr 20, 2025
1730c05
fixup! gh-131591: Add remote debugging attachment protocol documentation
ivonastojanovic Apr 20, 2025
c8a9a61
Add details per arch
pablogsal Apr 21, 2025
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fixup! gh-131591: Add remote debugging attachment protocol documentation
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@ivonastojanovic
ivonastojanovic committed Apr 20, 2025
commit 1730c05519a5810cb4ef6383015e896fc95b3207
18 changes: 10 additions & 8 deletions Doc/howto/remote_debugging.rst
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Expand Up @@ -14,7 +14,6 @@ detailed explanation of the underlying protocol, which takes as input the
executed. This information supports independent reimplementation of the
protocol, regardless of programming language.


.. warning::
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The execution of the injected script depends on the interpreter reaching a
Expand Down Expand Up @@ -149,10 +148,11 @@ To find the ``PyRuntime`` structure on Windows:
<https://learn.microsoft.com/en-us/windows/win32/api/tlhelp32/nf-tlhelp32-module32next>`_.
2. Identify the module corresponding to :file:`python.exe` or
:file:`python{XY}.dll`, where ``X`` and ``Y`` are the major and minor
version numbers of the Python version (for example, ``python311.dll``), and
record its base address.
3. Locate the ``PyRuntim`` section. Section names in the PE format are limited
to 8 characters.
version numbers of the Python version, and record its base address.
3. Locate the ``PyRuntim`` section. Due to the PE format's 8-character limit
on section names (defined as ``IMAGE_SIZEOF_SHORT_NAME``), the original
name ``PyRuntime`` is truncated. This section contains the ``PyRuntime``
structure.
4. Retrieve the section’s relative virtual address (RVA) and add it to the base
address of the module.

Expand All @@ -171,16 +171,18 @@ The following is an example implementation::
pid, name_contains="python3"
)

# Step 3: Parse PE section headers to get PyRuntim RVA
# Step 3: Parse PE section headers to get the RVA of the PyRuntime
# section. The section name appears as "PyRuntim" due to the
# 8-character limit defined by the PE format (IMAGE_SIZEOF_SHORT_NAME).
section_rva = parse_pe_section_offset(binary_path, "PyRuntim")

# Step 4: Compute PyRuntime address in memory
return base_address + section_rva



RReading _Py_DebugOffsets
=========================
Reading _Py_DebugOffsets
========================

Once the address of the ``PyRuntime`` structure has been determined, the next
step is to read the ``_Py_DebugOffsets`` structure located at the beginning of
Expand Down