ROLLOUT 7 · amaranth-lang/amaranth
amaranth-lang__amaranth-923
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12model calls
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You are a principal Python software engineer resolving a repository issue in `/workspace`. Your sole objective is to produce a minimal, root-cause source patch that passes every hidden fail-to-pass and pass-to-pass regression test on the first grading run. ## Critical Environment & Grader Rules 1. **Air-Gapped Sandbox & Available CLI Tools**: No network access. Never run `pip`, `uv`, `conda`, or `git fetch`. Note: `rg` (`ripgrep`) is NOT installed in the container — always use `grep -rn --include="*.py"` for fast exact searches so you never waste a tool call on `command not found`. 2. **Protected Grading Paths**: Before running official verification, the grading harness **strips and reverts all changes** to `tests/`, `test/`, `testing/`, `test_*.py`, `*_test.py`, `conftest.py`, `pyproject.toml`, `setup.cfg`, `pytest.ini`, and `tox.ini`. Every part of your fix MUST reside in non-test production source files. 3. **Untracked File Trap (`git add -N .`)**: `submit_patch` stages ALL untracked files inside `/workspace`! Never leave reproduction or scratch files inside `/workspace` — run reproductions inline via `python3 - <<'PY'` or inside `/tmp/repro.py` in a single `run_command`. 4. **Stdout Truncation Rule**: `run_command` truncates stdout after the first 5,000 characters from the TOP. Always run pytest quietly with short tracebacks: `pytest path/to/test_file.py -k pattern -q --tb=short --no-header` If a test file is large, redirect output to `/tmp/pytest.log` and inspect `tail -n 80 /tmp/pytest.log` so failure tracebacks at the bottom are never cut off. 5. **Strict Pacing Discipline**: `get_status` and `submit_patch` are free and do NOT count toward `max_tool_calls`. Target **16-22 counted tool calls total**, and **begin your first `edit_file` change no later than tool call 15**. Reserve at least 4 calls for verification, `git status --short && git diff`, and submission. ## Execution Protocol ### Phase 1 — Pinpoint Code & Tests Immediately (1-2 tool calls) - The user message already contains `Workspace Layout` — do NOT waste a turn running `ls` on top-level directories. - Run a single compound `run_command` with `grep -rn --include="*.py"` to locate: (a) the exact symbols, error strings, or functions from the problem description, (b) **all parallel or sibling implementations** (for example sync + async variants, `Client` + `AsyncClient`, serializer + deserializer, multiple backends/dialects, base + subclass methods, `__init__.py` / `__all__` exports), and (c) the closest existing unit test files under `tests/`. ### Phase 2 — Deep Read & Spec Anchor (2-5 tool calls) - Use `read_file` with generous `start_line` and `end_line` windows (180-300 lines per call so you read whole modules in fewer calls) on the target function/class, callers, type annotations, and neighboring tests. - Before editing, verify every explicit and implicit requirement from the issue: exact parameter names, defaults, boundary/domain edge cases, exception types/messages, `None` vs empty collection vs falsy (`0`, `False`, `""`) semantics, mutability/copying, and return types. ### Phase 3 — Reproduce Bug in One Call (1 tool call) - Run ONE concise command (`python3 - <<'PY' ... PY` or targeted `pytest ... -q --tb=short --no-header`) via `run_command` to observe the exact pre-fix failure. Do NOT spend multiple tool calls writing separate reproduction scripts. ### Phase 4 — Surgical Implementation Across All Parallel Paths (1-4 tool calls) - Begin editing by tool call 15! Use `edit_file` with 4-6 lines of exact surrounding context copied from `read_file`. - Update ALL parallel codepaths (sync/async, multiple classes/dialects, type hints) consistently so partial fixes do not fail sibling tests. - **2-Strike Edit Rule**: If `edit_file` fails twice on the same block due to whitespace or escaping, do not retry `edit_file` a third time — apply an atomic Python transformation via `run_command` and immediately verify `python3 -m py_compile path/to/file.py`. ### Phase 5 — Edge-Case Verification, Diff Hygiene & Clean Exit (2-4 tool calls) - Run a single compound `run_command` testing both your reproduction + boundary edge cases (`None`, empty input, leading/trailing delimiters, subdomain/prefix boundaries, subclass/async parity) AND the relevant existing `pytest` module(s) with `-q --tb=short --no-header`. - Run `git status --short && git diff` via `run_command`. Confirm: - ZERO untracked (`??`) files in `/workspace` (`rm -f` any untracked workspace files immediately), - ZERO modifications to `tests/` or protected config files (`git checkout -- tests/` if touched), - Minimal, clean diff with valid imports and indentation. - Call `submit_patch` once verification passes, then respond with a brief 2-sentence plain-text summary and make NO further tool calls.
Task prompt 5,653 characters
You are evaluating a software engineering task for repository amaranth-lang/amaranth.
Problem Statement:
Issue with `Memory` simulation
Hi,
we are currently updating Amaranth version in Coreblocks (https://github.com/kuznia-rdzeni/coreblocks/pull/461) and unexpectedly some unit tests started to fail. Part of failing unit tests check the whole core on assembler programs. Similar tests using Cocotb and Verilator passed successfully, so I assume some problems with simulation inside Amaranth (as unit tests use amaranth tests framework). After some investigation it looks like the issue is related #893. Here is a reproduction example:
```py
class MemoryReproduce(TestCaseWithSimulator):
class DUT(Elaboratable):
def __init__(self):
pass
def elaborate(self, platform):
m = Module()
self.mem = Memory(width=8, depth=8)
m.submodules.read_port = self.read_port = self.mem.read_port()
m.submodules.write_port = self.write_port = self.mem.write_port()
return m
def test_minimal(self):
m = self.DUT()
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield
print((yield m.read_port.data))
yield
yield m.write_port.addr.eq(2)
yield m.write_port.data.eq(14)
yield m.write_port.en.eq(1)
print((yield m.read_port.data))
yield
yield m.write_port.en.eq(0)
print((yield m.read_port.data))
yield
print((yield m.read_port.data))
yield
print((yield m.read_port.data))
with self.run_simulation(m) as sim:
sim.add_sync_process(process)
```
Output for this test case:
```
0
0
0
14
0
```

Idea is that we try to read memory from the one address and write to the other one. So we expect that writing has no impact on reading. But as you can see that is not a case in Amaranth simulation. Write cause that on read data output port there is visible written value for one cycle.
## Task Budget (Session terminates when any budget is exhausted)
- Time allowance: 7.5 minutes
- Tool calls allowance: 30 calls
- Max loop iterations: 40 turns
## Execution Environment Rules
- Single command timeout: 90 seconds (commands exceeding this fail without ending the session)
- Command output limit: 5000 characters
- File view limit: 150 lines per read_file call
- File character limit: 10000 characters per read_file call
- Environment is offline (no network/PyPI access). All repository and test dependencies are ALREADY pre-installed. Do NOT attempt to run pip install or download packages.
## Instructions:
0. All source code is under `/workspace`. Do NOT search outside `/workspace` (e.g. `/usr/`, `/wheels/`, system site-packages). If imports fail, the issue is in the source code under `/workspace`, not in missing system packages.
1. Analyze the problem statement and any provided hints carefully to identify all requested script paths, CLI subcommands, or Python modules.
2. Inspect existing codebase conventions and test files before making edits.
3. Verify your implementation using targeted tests or inline assertions before submitting.
4. Call submit_patch only after your implementation is complete and verified.
5. As your final action, you must return a text-only response reporting your completion to terminate the session.
## Workspace Layout
The repository is located at `/workspace`. Here is the directory tree (up to 3 levels):
```
./CONTRIBUTING.txt
./LICENSE.txt
./README.md
./amaranth
./amaranth/__init__.py
./amaranth/_toolchain
./amaranth/_toolchain/__init__.py
./amaranth/_toolchain/yosys.py
./amaranth/_unused.py
./amaranth/_utils.py
./amaranth/asserts.py
./amaranth/back
./amaranth/back/__init__.py
./amaranth/back/cxxrtl.py
./amaranth/back/rtlil.py
./amaranth/back/verilog.py
./amaranth/build
./amaranth/build/__init__.py
./amaranth/build/dsl.py
./amaranth/build/plat.py
./amaranth/build/res.py
./amaranth/build/run.py
./amaranth/cli.py
./amaranth/compat
./amaranth/compat/__init__.py
./amaranth/compat/fhdl
./amaranth/compat/genlib
./amaranth/compat/sim
./amaranth/hdl
./amaranth/hdl/__init__.py
./amaranth/hdl/_rec.py
./amaranth/hdl/ast.py
./amaranth/hdl/cd.py
./amaranth/hdl/dsl.py
./amaranth/hdl/ir.py
./amaranth/hdl/mem.py
./amaranth/hdl/rec.py
./amaranth/hdl/xfrm.py
./amaranth/lib
./amaranth/lib/__init__.py
./amaranth/lib/cdc.py
./amaranth/lib/coding.py
./amaranth/lib/crc
./amaranth/lib/data.py
./amaranth/lib/enum.py
./amaranth/lib/fifo.py
./amaranth/lib/io.py
./amaranth/lib/scheduler.py
./amaranth/lib/wiring.py
./amaranth/rpc.py
./amaranth/sim
./amaranth/sim/__init__.py
./amaranth/sim/_base.py
./amaranth/sim/_pyclock.py
./amaranth/sim/_pycoro.py
./amaranth/sim/_pyrtl.py
./amaranth/sim/core.py
./amaranth/sim/pysim.py
./amaranth/tracer.py
./amaranth/utils.py
./amaranth/vendor
./amaranth/vendor/__init__.py
./amaranth/vendor/_gowin.py
./amaranth/vendor/_intel.py
./amaranth/vendor/_lattice_ecp5.py
./amaranth/vendor/_lattice_ice40.py
./amaranth/vendor/_lattice_machxo_2_3l.py
./amaranth/vendor/_quicklogic.py
./amaranth/vendor/_xilinx.py
./amaranth/vendor/gowin.py
./amaranth/vendor/intel.py
./amaranth/vendor/lattice_ecp5.py
./amaranth/vendor/lattice_ice40.py
./amaranth/vendor/lattice_machxo_2_3l.py
./amaranth/vendor/quicklogic.py
./amaranth/vendor/xilinx.py
./docs
./examples
./pdm_build.py
./pyproject.toml
./tests
```
Turn 1at 36 s596 tokens out3,835 prompt tokens
The user is reporting a bug in `Memory` simulation in Amaranth.
According to the reproduction example:
- A `Memory` is created with width 8 and depth 8.
- A read port and a write port are created.
- A read is initiated at address 1.
- Then a write is initiated at address 2.
- The read data is observed.
- Specifically, the user says: "Write cause that on read data output port there is visible written value for one cycle" even though the read address (1) and write address (2) are different.
This suggests that the memory simulation logic is incorrectly updating the read port data when a write occurs, regardless of whether the addresses match.
Let's look at the reproduction code provided.
The output is:
0
0
0
14
0
Wait, let's trace the `process()` in the reproduction:
```py
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield
print((yield m.read_port.data)) # Should be 0 (init)
yield
yield m.write_port.addr.eq(2)
yield m.write_port.data.eq(14)
yield m.write_port.en.eq(1)
print((yield m.read_port.data)) # Should be 0 (addr 1 is read, addr 2 is written)
yield
yield m.write_port.en.eq(0)
print((yield m.read_port.data)) # Should be 0
yield
print((yield m.read_port.data)) # Should be 0
yield
print((yield m.read_port.data)) # Should be 0
```
Expected output:
0
0
0
0
0
Actual output:
0
0
0
14
0
The 14 appears when `m.write_port.en` is 1 and `m.write_port.addr` is 2, while `m.read_port.addr` is 1.
I need to find where `Memory` is implemented and how it's simulated.
`amaranth/hdl/mem.py` seems like a good place for the definition of `Memory`.
`amaranth/sim` seems like where the simulation logic resides.
Let's start by searching for `Memory` in the codebase.
TOOL CALL · run_command
{
"command": "grep -rn --include=\"*.py\" \"class Memory\" ."
}Result of run_command 177 characters
{
"status": "ok",
"stdout": "./amaranth/hdl/mem.py:12:class Memory(Elaboratable):\n./tests/test_hdl_mem.py:9:class MemoryTestCase(FHDLTestCase):\n",
"stderr": "",
"exit_code": 0
}Generated tokens 596 tokens · stopped: STOP
<|channel>thought
The user is reporting a bug in `Memory` simulation in Amaranth.
According to the reproduction example:
- A `Memory` is created with width 8 and depth 8.
- A read port and a write port are created.
- A read is initiated at address 1.
- Then a write is initiated at address 2.
- The read data is observed.
- Specifically, the user says: "Write cause that on read data output port there is visible written value for one cycle" even though the read address (1) and write address (2) are different.
This suggests that the memory simulation logic is incorrectly updating the read port data when a write occurs, regardless of whether the addresses match.
Let's look at the reproduction code provided.
The output is:
0
0
0
14
0
Wait, let's trace the `process()` in the reproduction:
```py
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield
print((yield m.read_port.data)) # Should be 0 (init)
yield
yield m.write_port.addr.eq(2)
yield m.write_port.data.eq(14)
yield m.write_port.en.eq(1)
print((yield m.read_port.data)) # Should be 0 (addr 1 is read, addr 2 is written)
yield
yield m.write_port.en.eq(0)
print((yield m.read_port.data)) # Should be 0
yield
print((yield m.read_port.data)) # Should be 0
yield
print((yield m.read_port.data)) # Should be 0
```
Expected output:
0
0
0
0
0
Actual output:
0
0
0
14
0
The 14 appears when `m.write_port.en` is 1 and `m.write_port.addr` is 2, while `m.read_port.addr` is 1.
I need to find where `Memory` is implemented and how it's simulated.
`amaranth/hdl/mem.py` seems like a good place for the definition of `Memory`.
`amaranth/sim` seems like where the simulation logic resides.
Let's start by searching for `Memory` in the codebase.<channel|><|tool_call>call:run_command{command:<|"|>grep -rn --include="*.py" "class Memory" .<|"|>}<tool_call|><|tool_response>
Turn 2at 41 s79 tokens out4,514 prompt tokens
Okay, `amaranth/hdl/mem.py` defines `Memory`. Now let's see how it's handled in simulation. I'll search for `Memory` in `amaranth/sim`.
TOOL CALL · run_command
{
"command": "grep -rn \"Memory\" amaranth/sim | grep -v \"import\""
}Result of run_command 127 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "",
"details": {
"stdout": "",
"stderr": "",
"exit_code": 1
}
}Generated tokens 79 tokens · stopped: STOP
Okay, `amaranth/hdl/mem.py` defines `Memory`.
Now let's see how it's handled in simulation. I'll search for `Memory` in `amaranth/sim`.
<channel|><|tool_call>call:run_command{command:<|"|>grep -rn "Memory" amaranth/sim | grep -v "import"<|"|>}<tool_call|><|tool_response>
Turn 3at 50 s136 tokens out4,648 prompt tokens
Wait, `grep` returned an error because `amaranth/sim` is a directory and I might have used it incorrectly or there are no matches. Let's try `grep -rn "Memory" amaranth/sim` again. Actually, I should look for how `Memory` is converted to something that the simulator can handle. Amaranth usually converts HDL to some internal IR or a simulation model. Let's check `amaranth/hdl/mem.py` first to see how it's implemented.
TOOL CALL · read_file
{
"filepath": "amaranth/hdl/mem.py"
}Result of read_file 5,973 characters
{
"status": "ok",
"filepath": "amaranth/hdl/mem.py",
"content": "import operator\nfrom collections import OrderedDict\n\nfrom .. import tracer\nfrom .ast import *\nfrom .ir import Elaboratable, Instance, Fragment\n\n\n__all__ = [\"Memory\", \"ReadPort\", \"WritePort\", \"DummyPort\"]\n\n\nclass Memory(Elaboratable):\n \"\"\"A word addressable storage.\n\n Parameters\n ----------\n width : int\n Access granularity. Each storage element of this memory is ``width`` bits in size.\n depth : int\n Word count. This memory contains ``depth`` storage elements.\n init : list of int\n Initial values. At power on, each storage element in this memory is initialized to\n the corresponding element of ``init``, if any, or to zero otherwise.\n Uninitialized memories are not currently supported.\n name : str\n Name hint for this memory. If ``None`` (default) the name is inferred from the variable\n name this ``Signal`` is assigned to.\n attrs : dict\n Dictionary of synthesis attributes.\n\n Attributes\n ----------\n width : int\n depth : int\n init : list of int\n attrs : dict\n \"\"\"\n def __init__(self, *, width, depth, init=None, name=None, attrs=None, simulate=True):\n if not isinstance(width, int) or width < 0:\n raise TypeError(\"Memory width must be a non-negative integer, not {!r}\"\n .format(width))\n if not isinstance(depth, int) or depth < 0:\n raise TypeError(\"Memory depth must be a non-negative integer, not {!r}\"\n .format(depth))\n\n self.name = name or tracer.get_var_name(depth=2, default=\"$memory\")\n self.src_loc = tracer.get_src_loc()\n\n self.width = width\n self.depth = depth\n self.attrs = OrderedDict(() if attrs is None else attrs)\n\n # Array of signals for simulation.\n self._array = Array()\n if simulate:\n for addr in range(self.depth):\n self._array.append(Signal(self.width, name=\"{}({})\"\n .format(name or \"memory\", addr)))\n\n self.init = init\n self._read_ports = []\n self._write_ports = []\n\n @property\n def init(self):\n return self._init\n\n @init.setter\n def init(self, new_init):\n self._init = [] if new_init is None else list(new_init)\n if len(self.init) > self.depth:\n raise ValueError(\"Memory initialization value count exceed memory depth ({} > {})\"\n .format(len(self.init), self.depth))\n\n try:\n for addr in range(len(self._array)):\n if addr < len(self._init):\n self._array[addr].reset = operator.index(self._init[addr])\n else:\n self._array[addr].reset = 0\n except TypeError as e:\n raise TypeError(\"Memory initialization value at address {:x}: {}\"\n .format(addr, e)) from None\n\n def read_port(self, *, src_loc_at=0, **kwargs):\n \"\"\"Get a read port.\n\n See :class:`ReadPort` for details.\n\n Arguments\n ---------\n domain : str\n transparent : bool\n\n Returns\n -------\n An instance of :class:`ReadPort` associated with this memory.\n \"\"\"\n return ReadPort(self, src_loc_at=1 + src_loc_at, **kwargs)\n\n def write_port(self, *, src_loc_at=0, **kwargs):\n \"\"\"Get a write port.\n\n See :class:`WritePort` for details.\n\n Arguments\n ---------\n domain : str\n granularity : int\n\n Returns\n -------\n An instance of :class:`WritePort` associated with this memory.\n \"\"\"\n return WritePort(self, src_loc_at=1 + src_loc_at, **kwargs)\n\n def __getitem__(self, index):\n \"\"\"Simulation only.\"\"\"\n return self._array[index]\n\n def elaborate(self, platform):\n init = \"\".join(format(Const(elem, unsigned(self.width)).value, f\"0{self.width}b\") for elem in reversed(self.init))\n init = Const(int(init or \"0\", 2), self.depth * self.width)\n rd_clk = []\n rd_clk_enable = 0\n rd_transparency_mask = 0\n for index, port in enumerate(self._read_ports):\n if port.domain != \"comb\":\n rd_clk.append(ClockSignal(port.domain))\n rd_clk_enable |= 1 << index\n if port.transparent:\n for write_index, write_port in enumerate(self._write_ports):\n if port.domain == write_port.domain:\n rd_transparency_mask |= 1 << (index * len(self._write_ports) + write_index)\n else:\n rd_clk.append(Const(0, 1))\n f = Instance(\"$mem_v2\",\n *((\"a\", attr, value) for attr, value in self.attrs.items()),\n p_SIZE=self.depth,\n p_OFFSET=0,\n p_ABITS=Shape.cast(range(self.depth)).width,\n p_WIDTH=self.width,\n p_INIT=init,\n p_RD_PORTS=len(self._read_ports),\n p_RD_CLK_ENABLE=Const(rd_clk_enable, len(self._read_ports)) if self._read_ports else Const(0, 1),\n p_RD_CLK_POLARITY=Const(-1, unsigned(len(self._read_ports))) if self._read_ports else Const(0, 1),\n p_RD_TRANSPARENCY_MASK=Const(rd_transparency_mask, max(1, len(self._read_ports) * len(self._write_ports))),\n p_RD_COLLISION_X_MASK=Const(0, max(1, len(self._read_ports) * len(self._write_ports))),\n p_RD_WIDE_CONTINUATION=Const(0, len(self._read_ports)) if self._read_ports else Const(0, 1),\n p_RD_CE_OVER_SRST=Const(0, len(self._read_ports)) if self._read_ports else Const(0, 1),",
"start_line": 1,
"end_line": 150,
"total_lines": 354,
"is_truncated": true
}Generated tokens 136 tokens · stopped: STOP
Wait, `grep` returned an error because `amaranth/sim` is a directory and I might have used it incorrectly or there are no matches.
Let's try `grep -rn "Memory" amaranth/sim` again.
Actually, I should look for how `Memory` is converted to something that the simulator can handle.
Amaranth usually converts HDL to some internal IR or a simulation model.
Let's check `amaranth/hdl/mem.py` first to see how it's implemented.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>}<tool_call|><|tool_response>
Turn 4at 63 s176 tokens out6,528 prompt tokens
The `Memory` class in `amaranth/hdl/mem.py` creates an `_array` of `Signal`s if `simulate=True`.
```python
# Array of signals for simulation.
self._array = Array()
if simulate:
for addr in range(self.depth):
self._array.append(Signal(self.width, name="{}({})".format(name or "memory", addr)))
```
These signals are likely used by the simulator to represent the memory content.
Now let's look at `ReadPort` and `WritePort` in `amaranth/hdl/mem.py`.
TOOL CALL · read_file
{
"filepath": "amaranth/hdl/mem.py",
"start_line": 151
}Result of read_file 7,018 characters
{
"status": "ok",
"filepath": "amaranth/hdl/mem.py",
"content": " p_RD_ARST_VALUE=Const(0, len(self._read_ports) * self.width),\n p_RD_SRST_VALUE=Const(0, len(self._read_ports) * self.width),\n p_RD_INIT_VALUE=Const(0, len(self._read_ports) * self.width),\n p_WR_PORTS=len(self._write_ports),\n p_WR_CLK_ENABLE=Const(-1, unsigned(len(self._write_ports))) if self._write_ports else Const(0, 1),\n p_WR_CLK_POLARITY=Const(-1, unsigned(len(self._write_ports))) if self._write_ports else Const(0, 1),\n p_WR_PRIORITY_MASK=Const(0, len(self._write_ports) * len(self._write_ports)) if self._write_ports else Const(0, 1),\n p_WR_WIDE_CONTINUATION=Const(0, len(self._write_ports)) if self._write_ports else Const(0, 1),\n i_RD_CLK=Cat(rd_clk),\n i_RD_EN=Cat(port.en for port in self._read_ports),\n i_RD_ARST=Const(0, len(self._read_ports)),\n i_RD_SRST=Const(0, len(self._read_ports)),\n i_RD_ADDR=Cat(port.addr for port in self._read_ports),\n o_RD_DATA=Cat(port.data for port in self._read_ports),\n i_WR_CLK=Cat(ClockSignal(port.domain) for port in self._write_ports),\n i_WR_EN=Cat(Cat(en_bit.replicate(port.granularity) for en_bit in port.en) for port in self._write_ports),\n i_WR_ADDR=Cat(port.addr for port in self._write_ports),\n i_WR_DATA=Cat(port.data for port in self._write_ports),\n )\n for port in self._read_ports:\n port._MustUse__used = True\n if port.domain == \"comb\":\n # Asynchronous port\n f.add_statements(port.data.eq(self._array[port.addr]))\n f.add_driver(port.data)\n else:\n # Synchronous port\n data = self._array[port.addr]\n for write_port in self._write_ports:\n if port.domain == write_port.domain and port.transparent:\n if len(write_port.en) > 1:\n parts = []\n for index, en_bit in enumerate(write_port.en):\n offset = index * write_port.granularity\n bits = slice(offset, offset + write_port.granularity)\n cond = en_bit & (port.addr == write_port.addr)\n parts.append(Mux(cond, write_port.data[bits], data[bits]))\n data = Cat(parts)\n else:\n data = Mux(write_port.en, write_port.data, data)\n f.add_statements(\n Switch(port.en, {\n 1: port.data.eq(data)\n })\n )\n f.add_driver(port.data, port.domain)\n for port in self._write_ports:\n port._MustUse__used = True\n if len(port.en) > 1:\n for index, en_bit in enumerate(port.en):\n offset = index * port.granularity\n bits = slice(offset, offset + port.granularity)\n write_data = self._array[port.addr][bits].eq(port.data[bits])\n f.add_statements(Switch(en_bit, { 1: write_data }))\n else:\n write_data = self._array[port.addr].eq(port.data)\n f.add_statements(Switch(port.en, { 1: write_data }))\n for signal in self._array:\n f.add_driver(signal, port.domain)\n return f\n\nclass ReadPort(Elaboratable):\n \"\"\"A memory read port.\n\n Parameters\n ----------\n memory : :class:`Memory`\n Memory associated with the port.\n domain : str\n Clock domain. Defaults to ``\"sync\"``. If set to ``\"comb\"``, the port is asynchronous.\n Otherwise, the read data becomes available on the next clock cycle.\n transparent : bool\n Port transparency. If set (default), a read at an address that is also being written to in\n the same clock cycle will output the new value. Otherwise, the old value will be output\n first. This behavior only applies to ports in the same domain.\n\n Attributes\n ----------\n memory : :class:`Memory`\n domain : str\n transparent : bool\n addr : Signal(range(memory.depth)), in\n Read address.\n data : Signal(memory.width), out\n Read data.\n en : Signal or Const, in\n Read enable. If asserted, ``data`` is updated with the word stored at ``addr``.\n\n Exceptions\n ----------\n Raises :exn:`ValueError` if the read port is simultaneously asynchronous and non-transparent.\n \"\"\"\n def __init__(self, memory, *, domain=\"sync\", transparent=True, src_loc_at=0):\n if domain == \"comb\" and not transparent:\n raise ValueError(\"Read port cannot be simultaneously asynchronous and non-transparent\")\n\n self.memory = memory\n self.domain = domain\n self.transparent = transparent\n\n self.addr = Signal(range(memory.depth),\n name=\"{}_r_addr\".format(memory.name), src_loc_at=1 + src_loc_at)\n self.data = Signal(memory.width,\n name=\"{}_r_data\".format(memory.name), src_loc_at=1 + src_loc_at)\n if self.domain != \"comb\":\n self.en = Signal(name=\"{}_r_en\".format(memory.name), reset=1,\n src_loc_at=1 + src_loc_at)\n else:\n self.en = Const(1)\n\n memory._read_ports.append(self)\n\n def elaborate(self, platform):\n if self is self.memory._read_ports[0]:\n return self.memory\n else:\n return Fragment()\n\n\nclass WritePort(Elaboratable):\n \"\"\"A memory write port.\n\n Parameters\n ----------\n memory : :class:`Memory`\n Memory associated with the port.\n domain : str\n Clock domain. Defaults to ``\"sync\"``. Writes have a latency of 1 clock cycle.\n granularity : int\n Port granularity. Defaults to ``memory.width``. Write data is split evenly in\n ``memory.width // granularity`` chunks, which can be updated independently.\n\n Attributes\n ----------\n memory : :class:`Memory`\n domain : str\n granularity : int\n addr : Signal(range(memory.depth)), in\n Write address.\n data : Signal(memory.width), in\n Write data.\n en : Signal(memory.width // granularity), in\n Write enable. Each bit selects a non-overlapping chunk of ``granularity`` bits on the\n ``data`` signal, which is written to memory at ``addr``. Unselected chunks are ignored.\n\n Exceptions\n ----------\n Raises :exn:`ValueError` if the write port granularity is greater than memory width, or does not\n divide memory width evenly.\n \"\"\"",
"start_line": 151,
"end_line": 300,
"total_lines": 354,
"is_truncated": true
}Generated tokens 176 tokens · stopped: STOP
The `Memory` class in `amaranth/hdl/mem.py` creates an `_array` of `Signal`s if `simulate=True`.
```python
# Array of signals for simulation.
self._array = Array()
if simulate:
for addr in range(self.depth):
self._array.append(Signal(self.width, name="{}({})".format(name or "memory", addr)))
```
These signals are likely used by the simulator to represent the memory content.
Now let's look at `ReadPort` and `WritePort` in `amaranth/hdl/mem.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>,start_line:151}<tool_call|><|tool_response>
Turn 5at 65 s41 tokens out8,691 prompt tokens
And the rest of `WritePort`:
TOOL CALL · read_file
{
"filepath": "amaranth/hdl/mem.py",
"start_line": 301
}Result of read_file 2,670 characters
{
"status": "ok",
"filepath": "amaranth/hdl/mem.py",
"content": " def __init__(self, memory, *, domain=\"sync\", granularity=None, src_loc_at=0):\n if granularity is None:\n granularity = memory.width\n if not isinstance(granularity, int) or granularity < 0:\n raise TypeError(\"Write port granularity must be a non-negative integer, not {!r}\"\n .format(granularity))\n if granularity > memory.width:\n raise ValueError(\"Write port granularity must not be greater than memory width \"\n \"({} > {})\"\n .format(granularity, memory.width))\n if memory.width // granularity * granularity != memory.width:\n raise ValueError(\"Write port granularity must divide memory width evenly\")\n\n self.memory = memory\n self.domain = domain\n self.granularity = granularity\n\n self.addr = Signal(range(memory.depth),\n name=\"{}_w_addr\".format(memory.name), src_loc_at=1 + src_loc_at)\n self.data = Signal(memory.width,\n name=\"{}_w_data\".format(memory.name), src_loc_at=1 + src_loc_at)\n self.en = Signal(memory.width // granularity,\n name=\"{}_w_en\".format(memory.name), src_loc_at=1 + src_loc_at)\n\n memory._write_ports.append(self)\n\n def elaborate(self, platform):\n if not self.memory._read_ports and self is self.memory._write_ports[0]:\n return self.memory\n else:\n return Fragment()\n\n\nclass DummyPort:\n \"\"\"Dummy memory port.\n\n This port can be used in place of either a read or a write port for testing and verification.\n It does not include any read/write port specific attributes, i.e. none besides ``\"domain\"``;\n any such attributes may be set manually.\n \"\"\"\n def __init__(self, *, data_width, addr_width, domain=\"sync\", name=None, granularity=None):\n self.domain = domain\n\n if granularity is None:\n granularity = data_width\n if name is None:\n name = tracer.get_var_name(depth=2, default=\"dummy\")\n\n self.addr = Signal(addr_width,\n name=\"{}_addr\".format(name), src_loc_at=1)\n self.data = Signal(data_width,\n name=\"{}_data\".format(name), src_loc_at=1)\n self.en = Signal(data_width // granularity,\n name=\"{}_en\".format(name), src_loc_at=1)",
"start_line": 301,
"end_line": 354,
"total_lines": 354,
"is_truncated": false
}Generated tokens 41 tokens · stopped: STOP
And the rest of `WritePort`:
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/hdl/mem.py<|"|>,start_line:301}<tool_call|><|tool_response>
Turn 6at 132 s1,111 tokens out9,471 prompt tokens
The `Memory` class handles simulation by creating an array of `Signal`s.
In `elaborate`, it adds statements for read and write ports.
For a synchronous read port (`port.domain != "comb"`):
```python
# Synchronous port
data = self._array[port.addr]
for write_port in self._write_ports:
if port.domain == write_port.domain and port.transparent:
if len(write_port.en) > 1:
parts = []
for index, en_bit in enumerate(write_port.en):
offset = index * write_port.granularity
bits = slice(offset, offset + write_port.granularity)
cond = en_bit & (port.addr == write_port.addr) # Note: port.addr == write_port.addr
parts.append(Mux(cond, write_port.data[bits], data[bits]))
data = Cat(parts)
else:
data = Mux(write_port.en & (port.addr == write_port.addr), write_port.data, data) # Wait, the code says:
# data = Mux(write_port.en, write_port.data, data)
# Let's re-read it carefully.
```
Wait, looking at the code I read:
```python
else:
data = Mux(write_port.en, write_port.data, data)
```
In the `else` block (when `len(write_port.en) == 1`), it's `data = Mux(write_port.en, write_port.data, data)`.
It DOES NOT check if `port.addr == write_port.addr`!
Wait, let me re-read that section of `amaranth/hdl/mem.py` very carefully.
Line 181:
```python
else:
data = Mux(write_port.en, write_port.data, data)
```
YES! This is exactly the bug! If `len(write_port.en) == 1` (which is the default case for a single-word write), the transparency logic is applied regardless of whether the read address matches the write address.
If `len(write_port.en) > 1`, it DOES check:
```python
cond = en_bit & (port.addr == write_port.addr)
parts.append(Mux(cond, write_port.data[bits], data[bits]))
```
So for `len(write_port.en) == 1`, it should be:
`data = Mux(write_port.en & (port.addr == write_port.addr), write_port.data, data)`
Let's verify this by creating a reproduction script.
TOOL CALL · write_file
{
"content": "\nfrom amaranth import *\nfrom amaranth.sim import TestCaseWithSimulator\n\nclass MemoryReproduce(TestCaseWithSimulator):\n class DUT(Elaboratable):\n def __init__(self):\n pass\n\n def elaborate(self, platform):\n m = Module()\n self.mem = Memory(width=8, depth=8)\n m.submodules.read_port = self.read_port = self.mem.read_port()\n m.submodules.write_port = self.write_port = self.mem.write_port()\n return m\n\n def test_minimal(self):\n m = self.DUT()\n\n def process():\n yield m.read_port.addr.eq(1)\n yield m.read_port.en.eq(1)\n yield\n print(f\"Read 1: {(yield m.read_port.data)}\")\n yield\n yield m.write_port.addr.eq(2)\n yield m.write_port.data.eq(14)\n yield m.write_port.en.eq(1)\n print(f\"Read 2: {(yield m.read_port.data)}\") # Should be 0\n yield\n yield m.write_port.en.eq(0)\n print(f\"Read 3: {(yield m.read_port.data)}\") # Should be 0\n yield\n print(f\"Read 4: {(yield m.read_port.data)}\") # Should be 0\n yield\n print(f\"Read 5: {(yield m.read_port.data)}\") # Should be 0\n\n with self.run_simulation(m) as sim:\n sim.add_sync_process(process)\n\nif __name__ == \"__main__\":\n import pytest\n pytest.main([__file__])\n",
"filepath": "/tmp/repro.py"
}Result of write_file 136 characters
{
"status": "error",
"error_type": "FileWriteError",
"error_message": "Path traversal detected: '/tmp/repro.py' escapes workspace root."
}Generated tokens 1,111 tokens · stopped: STOP
The `Memory` class handles simulation by creating an array of `Signal`s.
In `elaborate`, it adds statements for read and write ports.
For a synchronous read port (`port.domain != "comb"`):
```python
# Synchronous port
data = self._array[port.addr]
for write_port in self._write_ports:
if port.domain == write_port.domain and port.transparent:
if len(write_port.en) > 1:
parts = []
for index, en_bit in enumerate(write_port.en):
offset = index * write_port.granularity
bits = slice(offset, offset + write_port.granularity)
cond = en_bit & (port.addr == write_port.addr) # Note: port.addr == write_port.addr
parts.append(Mux(cond, write_port.data[bits], data[bits]))
data = Cat(parts)
else:
data = Mux(write_port.en & (port.addr == write_port.addr), write_port.data, data) # Wait, the code says:
# data = Mux(write_port.en, write_port.data, data)
# Let's re-read it carefully.
```
Wait, looking at the code I read:
```python
else:
data = Mux(write_port.en, write_port.data, data)
```
In the `else` block (when `len(write_port.en) == 1`), it's `data = Mux(write_port.en, write_port.data, data)`.
It DOES NOT check if `port.addr == write_port.addr`!
Wait, let me re-read that section of `amaranth/hdl/mem.py` very carefully.
Line 181:
```python
else:
data = Mux(write_port.en, write_port.data, data)
```
YES! This is exactly the bug! If `len(write_port.en) == 1` (which is the default case for a single-word write), the transparency logic is applied regardless of whether the read address matches the write address.
If `len(write_port.en) > 1`, it DOES check:
```python
cond = en_bit & (port.addr == write_port.addr)
parts.append(Mux(cond, write_port.data[bits], data[bits]))
```
So for `len(write_port.en) == 1`, it should be:
`data = Mux(write_port.en & (port.addr == write_port.addr), write_port.data, data)`
Let's verify this by creating a reproduction script.
<channel|><|tool_call>call:write_file{filepath:<|"|>/tmp/repro.py<|"|>,content:<|"|>
from amaranth import *
from amaranth.sim import TestCaseWithSimulator
class MemoryReproduce(TestCaseWithSimulator):
class DUT(Elaboratable):
def __init__(self):
pass
def elaborate(self, platform):
m = Module()
self.mem = Memory(width=8, depth=8)
m.submodules.read_port = self.read_port = self.mem.read_port()
m.submodules.write_port = self.write_port = self.mem.write_port()
return m
def test_minimal(self):
m = self.DUT()
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield
print(f"Read 1: {(yield m.read_port.data)}")
yield
yield m.write_port.addr.eq(2)
yield m.write_port.data.eq(14)
yield m.write_port.en.eq(1)
print(f"Read 2: {(yield m.read_port.data)}") # Should be 0
yield
yield m.write_port.en.eq(0)
print(f"Read 3: {(yield m.read_port.data)}") # Should be 0
yield
print(f"Read 4: {(yield m.read_port.data)}") # Should be 0
yield
print(f"Read 5: {(yield m.read_port.data)}") # Should be 0
with self.run_simulation(m) as sim:
sim.add_sync_process(process)
if __name__ == "__main__":
import pytest
pytest.main([__file__])
<|"|>}<tool_call|><|tool_response>
Turn 7at 155 s497 tokens out10,636 prompt tokens
Ah, I cannot write to `/tmp/repro.py`. I must write to `/workspace/repro.py` or similar, but then I must remove it before submitting. Or just use `python3 - <<'PY'`. Let's use `python3 - <<'PY'`.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth import *\nfrom amaranth.sim import TestCaseWithSimulator\nimport pytest\n\nclass MemoryReproduce(TestCaseWithSimulator):\n class DUT(Elaboratable):\n def __init__(self):\n pass\n\n def elaborate(self, platform):\n m = Module()\n self.mem = Memory(width=8, depth=8)\n m.submodules.read_port = self.read_port = self.mem.read_port()\n m.submodules.write_port = self.write_port = self.mem.write_port()\n return m\n\n def test_minimal(self):\n m = self.DUT()\n\n def process():\n yield m.read_port.addr.eq(1)\n yield m.read_port.en.eq(1)\n yield\n print(f\"Read 1: {(yield m.read_port.data)}\")\n yield\n yield m.write_port.addr.eq(2)\n yield m.write_port.data.eq(14)\n yield m.write_port.en.eq(1)\n print(f\"Read 2: {(yield m.read_port.data)}\")\n yield\n yield m.write_port.en.eq(0)\n print(f\"Read 3: {(yield m.read_port.data)}\")\n yield\n print(f\"Read 4: {(yield m.read_port.data)}\")\n yield\n print(f\"Read 5: {(yield m.read_port.data)}\")\n\n with self.run_simulation(m) as sim:\n sim.add_sync_process(process)\n\nif __name__ == \"__main__\":\n pytest.main([__file__])\nPY\n"
}Result of run_command 511 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "Traceback (most recent call last):\n File \"<stdin>\", line 2, in <module>\nImportError: cannot import name 'TestCaseWithSimulator' from 'amaranth.sim' (/workspace/amaranth/sim/__init__.py)\n",
"details": {
"stdout": "",
"stderr": "Traceback (most recent call last):\n File \"<stdin>\", line 2, in <module>\nImportError: cannot import name 'TestCaseWithSimulator' from 'amaranth.sim' (/workspace/amaranth/sim/__init__.py)\n",
"exit_code": 1
}
}Generated tokens 497 tokens · stopped: STOP
Ah, I cannot write to `/tmp/repro.py`. I must write to `/workspace/repro.py` or similar, but then I must remove it before submitting. Or just use `python3 - <<'PY'`.
Let's use `python3 - <<'PY'`.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth import *
from amaranth.sim import TestCaseWithSimulator
import pytest
class MemoryReproduce(TestCaseWithSimulator):
class DUT(Elaboratable):
def __init__(self):
pass
def elaborate(self, platform):
m = Module()
self.mem = Memory(width=8, depth=8)
m.submodules.read_port = self.read_port = self.mem.read_port()
m.submodules.write_port = self.write_port = self.mem.write_port()
return m
def test_minimal(self):
m = self.DUT()
def process():
yield m.read_port.addr.eq(1)
yield m.read_port.en.eq(1)
yield
print(f"Read 1: {(yield m.read_port.data)}")
yield
yield m.write_port.addr.eq(2)
yield m.write_port.data.eq(14)
yield m.write_port.en.eq(1)
print(f"Read 2: {(yield m.read_port.data)}")
yield
yield m.write_port.en.eq(0)
print(f"Read 3: {(yield m.read_port.data)}")
yield
print(f"Read 4: {(yield m.read_port.data)}")
yield
print(f"Read 5: {(yield m.read_port.data)}")
with self.run_simulation(m) as sim:
sim.add_sync_process(process)
if __name__ == "__main__":
pytest.main([__file__])
PY
<|"|>}<tool_call|><|tool_response>
Turn 8at 158 s54 tokens out11,302 prompt tokens
It seems `TestCaseWithSimulator` is no longer in `amaranth.sim`. Let me check `amaranth/sim/__init__.py`.
TOOL CALL · read_file
{
"filepath": "amaranth/sim/__init__.py"
}Result of read_file 252 characters
{
"status": "ok",
"filepath": "amaranth/sim/__init__.py",
"content": "from .core import *\n\n\n__all__ = [\"Settle\", \"Delay\", \"Tick\", \"Passive\", \"Active\", \"Simulator\"]",
"start_line": 1,
"end_line": 4,
"total_lines": 4,
"is_truncated": false
}Generated tokens 54 tokens · stopped: STOP
It seems `TestCaseWithSimulator` is no longer in `amaranth.sim`. Let me check `amaranth/sim/__init__.py`.
<channel|><|tool_call>call:read_file{filepath:<|"|>amaranth/sim/__init__.py<|"|>}<tool_call|><|tool_response>
Turn 9at 162 s77 tokens out11,460 prompt tokens
Okay, `TestCaseWithSimulator` is not there. The provided reproduction code might be for an older version of Amaranth. Let's look at `tests/test_hdl_mem.py` to see how they write simulation tests.
TOOL CALL · read_file
{
"filepath": "tests/test_hdl_mem.py"
}Result of read_file 5,859 characters
{
"status": "ok",
"filepath": "tests/test_hdl_mem.py",
"content": "# amaranth: UnusedElaboratable=no\n\nfrom amaranth.hdl.ast import *\nfrom amaranth.hdl.mem import *\n\nfrom .utils import *\n\n\nclass MemoryTestCase(FHDLTestCase):\n def test_name(self):\n m1 = Memory(width=8, depth=4)\n self.assertEqual(m1.name, \"m1\")\n m2 = [Memory(width=8, depth=4)][0]\n self.assertEqual(m2.name, \"$memory\")\n m3 = Memory(width=8, depth=4, name=\"foo\")\n self.assertEqual(m3.name, \"foo\")\n\n def test_geometry(self):\n m = Memory(width=8, depth=4)\n self.assertEqual(m.width, 8)\n self.assertEqual(m.depth, 4)\n\n def test_geometry_wrong(self):\n with self.assertRaisesRegex(TypeError,\n r\"^Memory width must be a non-negative integer, not -1$\"):\n m = Memory(width=-1, depth=4)\n with self.assertRaisesRegex(TypeError,\n r\"^Memory depth must be a non-negative integer, not -1$\"):\n m = Memory(width=8, depth=-1)\n\n def test_init(self):\n m = Memory(width=8, depth=4, init=range(4))\n self.assertEqual(m.init, [0, 1, 2, 3])\n\n def test_init_wrong_count(self):\n with self.assertRaisesRegex(ValueError,\n r\"^Memory initialization value count exceed memory depth \\(8 > 4\\)$\"):\n m = Memory(width=8, depth=4, init=range(8))\n\n def test_init_wrong_type(self):\n with self.assertRaisesRegex(TypeError,\n (r\"^Memory initialization value at address 1: \"\n r\"'str' object cannot be interpreted as an integer$\")):\n m = Memory(width=8, depth=4, init=[1, \"0\"])\n\n def test_attrs(self):\n m1 = Memory(width=8, depth=4)\n self.assertEqual(m1.attrs, {})\n m2 = Memory(width=8, depth=4, attrs={\"ram_block\": True})\n self.assertEqual(m2.attrs, {\"ram_block\": True})\n\n def test_read_port_transparent(self):\n mem = Memory(width=8, depth=4)\n rdport = mem.read_port()\n self.assertEqual(rdport.memory, mem)\n self.assertEqual(rdport.domain, \"sync\")\n self.assertEqual(rdport.transparent, True)\n self.assertEqual(len(rdport.addr), 2)\n self.assertEqual(len(rdport.data), 8)\n self.assertEqual(len(rdport.en), 1)\n self.assertIsInstance(rdport.en, Signal)\n self.assertEqual(rdport.en.reset, 1)\n\n def test_read_port_non_transparent(self):\n mem = Memory(width=8, depth=4)\n rdport = mem.read_port(transparent=False)\n self.assertEqual(rdport.memory, mem)\n self.assertEqual(rdport.domain, \"sync\")\n self.assertEqual(rdport.transparent, False)\n self.assertEqual(len(rdport.en), 1)\n self.assertIsInstance(rdport.en, Signal)\n self.assertEqual(rdport.en.reset, 1)\n\n def test_read_port_asynchronous(self):\n mem = Memory(width=8, depth=4)\n rdport = mem.read_port(domain=\"comb\")\n self.assertEqual(rdport.memory, mem)\n self.assertEqual(rdport.domain, \"comb\")\n self.assertEqual(rdport.transparent, True)\n self.assertEqual(len(rdport.en), 1)\n self.assertIsInstance(rdport.en, Const)\n self.assertEqual(rdport.en.value, 1)\n\n def test_read_port_wrong(self):\n mem = Memory(width=8, depth=4)\n with self.assertRaisesRegex(ValueError,\n r\"^Read port cannot be simultaneously asynchronous and non-transparent$\"):\n mem.read_port(domain=\"comb\", transparent=False)\n\n def test_write_port(self):\n mem = Memory(width=8, depth=4)\n wrport = mem.write_port()\n self.assertEqual(wrport.memory, mem)\n self.assertEqual(wrport.domain, \"sync\")\n self.assertEqual(wrport.granularity, 8)\n self.assertEqual(len(wrport.addr), 2)\n self.assertEqual(len(wrport.data), 8)\n self.assertEqual(len(wrport.en), 1)\n\n def test_write_port_granularity(self):\n mem = Memory(width=8, depth=4)\n wrport = mem.write_port(granularity=2)\n self.assertEqual(wrport.memory, mem)\n self.assertEqual(wrport.domain, \"sync\")\n self.assertEqual(wrport.granularity, 2)\n self.assertEqual(len(wrport.addr), 2)\n self.assertEqual(len(wrport.data), 8)\n self.assertEqual(len(wrport.en), 4)\n\n def test_write_port_granularity_wrong(self):\n mem = Memory(width=8, depth=4)\n with self.assertRaisesRegex(TypeError,\n r\"^Write port granularity must be a non-negative integer, not -1$\"):\n mem.write_port(granularity=-1)\n with self.assertRaisesRegex(ValueError,\n r\"^Write port granularity must not be greater than memory width \\(10 > 8\\)$\"):\n mem.write_port(granularity=10)\n with self.assertRaisesRegex(ValueError,\n r\"^Write port granularity must divide memory width evenly$\"):\n mem.write_port(granularity=3)\n\n\nclass DummyPortTestCase(FHDLTestCase):\n def test_name(self):\n p1 = DummyPort(data_width=8, addr_width=2)\n self.assertEqual(p1.addr.name, \"p1_addr\")\n p2 = [DummyPort(data_width=8, addr_width=2)][0]\n self.assertEqual(p2.addr.name, \"dummy_addr\")\n p3 = DummyPort(data_width=8, addr_width=2, name=\"foo\")\n self.assertEqual(p3.addr.name, \"foo_addr\")\n\n def test_sizes(self):\n p1 = DummyPort(data_width=8, addr_width=2)\n self.assertEqual(p1.addr.width, 2)\n self.assertEqual(p1.data.width, 8)\n self.assertEqual(p1.en.width, 1)\n p2 = DummyPort(data_width=8, addr_width=2, granularity=2)\n self.assertEqual(p2.en.width, 4)",
"start_line": 1,
"end_line": 138,
"total_lines": 138,
"is_truncated": false
}Generated tokens 77 tokens · stopped: STOP
Okay, `TestCaseWithSimulator` is not there. The provided reproduction code might be for an older version of Amaranth.
Let's look at `tests/test_hdl_mem.py` to see how they write simulation tests.
<channel|><|tool_call>call:read_file{filepath:<|"|>tests/test_hdl_mem.py<|"|>}<tool_call|><|tool_response>
Turn 10at 195 s564 tokens out13,420 prompt tokens
The tests in `tests/test_hdl_mem.py` only test the structure of `Memory`, not the actual simulation. I need to find where `FHDLTestCase` is defined. It's likely in `tests/utils.py`. Regardless, I can write my own simulation test using `amaranth.sim.Simulator`. Let's try to write a reproduction script that uses `Simulator` directly.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth import *\nfrom amaranth.sim import Simulator\n\nclass DUT(Elaboratable):\n def __init__(self):\n self.mem = Memory(width=8, depth=8)\n self.read_port = None\n self.write_port = None\n\n def elaborate(self, platform):\n m = Module()\n self.read_port = self.mem.read_port()\n self.write_port = self.mem.write_port()\n m.submodules.read_port = self.read_port\n m.submodules.write_port = self.write_port\n return m\n\ndef test_minimal():\n dut = DUT()\n\n def process():\n yield dut.read_port.addr.eq(1)\n yield dut.read_port.en.eq(1)\n yield\n val1 = yield dut.read_port.data\n print(f\"Read 1 (addr 1): {val1}\")\n \n yield\n yield dut.write_port.addr.eq(2)\n yield dut.write_port.data.eq(14)\n yield dut.write_port.en.eq(1)\n val2 = yield dut.read_port.data\n print(f\"Read 2 (addr 1, write addr 2): {val2}\")\n \n yield\n yield dut.write_port.en.eq(0)\n val3 = yield dut.read_port.data\n print(f\"Read 3 (addr 1, write en 0): {val3}\")\n \n yield\n val4 = yield dut.read_port.data\n print(f\"Read 4 (addr 1): {val4}\")\n\n sim = Simulator(DUT())\n sim.add_sync_process(process)\n sim.run()\n\nif __name__ == \"__main__\":\n test_minimal()\nPY\n"
}Result of run_command 107 characters
{
"status": "error",
"error_type": "TimeoutExceeded",
"error_message": "Command timed out after 90 seconds"
}Generated tokens 564 tokens · stopped: STOP
The tests in `tests/test_hdl_mem.py` only test the structure of `Memory`, not the actual simulation.
I need to find where `FHDLTestCase` is defined. It's likely in `tests/utils.py`.
Regardless, I can write my own simulation test using `amaranth.sim.Simulator`.
Let's try to write a reproduction script that uses `Simulator` directly.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth import *
from amaranth.sim import Simulator
class DUT(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=8)
self.read_port = None
self.write_port = None
def elaborate(self, platform):
m = Module()
self.read_port = self.mem.read_port()
self.write_port = self.mem.write_port()
m.submodules.read_port = self.read_port
m.submodules.write_port = self.write_port
return m
def test_minimal():
dut = DUT()
def process():
yield dut.read_port.addr.eq(1)
yield dut.read_port.en.eq(1)
yield
val1 = yield dut.read_port.data
print(f"Read 1 (addr 1): {val1}")
yield
yield dut.write_port.addr.eq(2)
yield dut.write_port.data.eq(14)
yield dut.write_port.en.eq(1)
val2 = yield dut.read_port.data
print(f"Read 2 (addr 1, write addr 2): {val2}")
yield
yield dut.write_port.en.eq(0)
val3 = yield dut.read_port.data
print(f"Read 3 (addr 1, write en 0): {val3}")
yield
val4 = yield dut.read_port.data
print(f"Read 4 (addr 1): {val4}")
sim = Simulator(DUT())
sim.add_sync_process(process)
sim.run()
if __name__ == "__main__":
test_minimal()
PY
<|"|>}<tool_call|><|tool_response>
Turn 11at 317 s598 tokens out14,030 prompt tokens
The simulation timed out. This might be because `sim.run()` without arguments runs forever if there are processes. I should use `sim.run(steps=...)` or wait for a condition. Actually, `sim.run()` should run until all processes are finished. But in my `process()`, I don't have any return or termination. Wait, the `process()` function in the reproduction code didn't return. In Amaranth simulation, a process finishes when it returns. Let's try again with a finite number of steps or making the process return.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth import *\nfrom amaranth.sim import Simulator\n\nclass DUT(Elaboratable):\n def __init__(self):\n self.mem = Memory(width=8, depth=8)\n self.read_port = None\n self.write_port = None\n\n def elaborate(self, platform):\n m = Module()\n self.read_port = self.mem.read_port()\n self.write_port = self.mem.write_port()\n m.submodules.read_port = self.read_port\n m.submodules.write_port = self.write_port\n return m\n\ndef test_minimal():\n dut = DUT()\n\n def process():\n yield dut.read_port.addr.eq(1)\n yield dut.read_port.en.eq(1)\n yield\n val1 = yield dut.read_port.data\n print(f\"Read 1 (addr 1): {val1}\")\n \n yield\n yield dut.write_port.addr.eq(2)\n yield dut.write_port.data.eq(14)\n yield dut.write_port.en.eq(1)\n val2 = yield dut.read_port.data\n print(f\"Read 2 (addr 1, write addr 2): {val2}\")\n \n yield\n yield dut.write_port.en.eq(0)\n val3 = yield dut.read_port.data\n print(f\"Read 3 (addr 1, write en 0): {val3}\")\n \n yield\n val4 = yield dut.read_port.data\n print(f\"Read 4 (addr 1): {val4}\")\n return\n\n sim = Simulator(DUT())\n sim.add_sync_process(process)\n sim.run()\n\nif __name__ == \"__main__\":\n test_minimal()\nPY\n"
}Result of run_command 107 characters
{
"status": "error",
"error_type": "TimeoutExceeded",
"error_message": "Command timed out after 90 seconds"
}Generated tokens 598 tokens · stopped: STOP
The simulation timed out. This might be because `sim.run()` without arguments runs forever if there are processes. I should use `sim.run(steps=...)` or wait for a condition.
Actually, `sim.run()` should run until all processes are finished. But in my `process()`, I don't have any return or termination.
Wait, the `process()` function in the reproduction code didn't return. In Amaranth simulation, a process finishes when it returns.
Let's try again with a finite number of steps or making the process return.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth import *
from amaranth.sim import Simulator
class DUT(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=8)
self.read_port = None
self.write_port = None
def elaborate(self, platform):
m = Module()
self.read_port = self.mem.read_port()
self.write_port = self.mem.write_port()
m.submodules.read_port = self.read_port
m.submodules.write_port = self.write_port
return m
def test_minimal():
dut = DUT()
def process():
yield dut.read_port.addr.eq(1)
yield dut.read_port.en.eq(1)
yield
val1 = yield dut.read_port.data
print(f"Read 1 (addr 1): {val1}")
yield
yield dut.write_port.addr.eq(2)
yield dut.write_port.data.eq(14)
yield dut.write_port.en.eq(1)
val2 = yield dut.read_port.data
print(f"Read 2 (addr 1, write addr 2): {val2}")
yield
yield dut.write_port.en.eq(0)
val3 = yield dut.read_port.data
print(f"Read 3 (addr 1, write en 0): {val3}")
yield
val4 = yield dut.read_port.data
print(f"Read 4 (addr 1): {val4}")
return
sim = Simulator(DUT())
sim.add_sync_process(process)
sim.run()
if __name__ == "__main__":
test_minimal()
PY
<|"|>}<tool_call|><|tool_response>
Turn 12at 437 s606 tokens out14,674 prompt tokens
Still timing out. I suspect something in the simulation engine is taking too long or the `DUT` is not being elaborated correctly.
The `Simulator(DUT())` takes an instance of `Elaboratable`.
Wait, maybe I should use `Simulator` as a context manager?
```python
with Simulator(DUT()) as sim:
sim.add_sync_process(process)
sim.run()
```
No, `sim.run()` is usually called on the simulator instance.
Let's try to run it with `sim.run(steps=20)`.
TOOL CALL · run_command
{
"command": "python3 - <<'PY'\nfrom amaranth import *\nfrom amaranth.sim import Simulator\n\nclass DUT(Elaboratable):\n def __init__(self):\n self.mem = Memory(width=8, depth=8)\n self.read_port = None\n self.write_port = None\n\n def elaborate(self, platform):\n m = Module()\n self.read_port = self.mem.read_port()\n self.write_port = self.mem.write_port()\n m.submodules.read_port = self.read_port\n m.submodules.write_port = self.write_port\n return m\n\ndef test_minimal():\n dut = DUT()\n\n def process():\n yield dut.read_port.addr.eq(1)\n yield dut.read_port.en.eq(1)\n yield\n val1 = yield dut.read_port.data\n print(f\"Read 1 (addr 1): {val1}\")\n \n yield\n yield dut.write_port.addr.eq(2)\n yield dut.write_port.data.eq(14)\n yield dut.write_port.en.eq(1)\n val2 = yield dut.read_port.data\n print(f\"Read 2 (addr 1, write addr 2): {val2}\")\n \n yield\n yield dut.write_port.en.eq(0)\n val3 = yield dut.read_port.data\n print(f\"Read 3 (addr 1, write en 0): {val3}\")\n \n yield\n val4 = yield dut.read_port.data\n print(f\"Read 4 (addr 1): {val4}\")\n\n sim = Simulator(DUT())\n sim.add_sync_process(process)\n sim.run(steps=20)\n\nif __name__ == \"__main__\":\n test_minimal()\nPY\n"
}Result of run_command 517 characters
{
"status": "error",
"error_type": "CommandError",
"error_message": "Traceback (most recent call last):\n File \"<stdin>\", line 49, in <module>\n File \"<stdin>\", line 46, in test_minimal\nTypeError: Simulator.run() got an unexpected keyword argument 'steps'\n",
"details": {
"stdout": "",
"stderr": "Traceback (most recent call last):\n File \"<stdin>\", line 49, in <module>\n File \"<stdin>\", line 46, in test_minimal\nTypeError: Simulator.run() got an unexpected keyword argument 'steps'\n",
"exit_code": 1
}
}Generated tokens 606 tokens · stopped: STOP
Still timing out. I suspect something in the simulation engine is taking too long or the `DUT` is not being elaborated correctly.
The `Simulator(DUT())` takes an instance of `Elaboratable`.
Wait, maybe I should use `Simulator` as a context manager?
```python
with Simulator(DUT()) as sim:
sim.add_sync_process(process)
sim.run()
```
No, `sim.run()` is usually called on the simulator instance.
Let's try to run it with `sim.run(steps=20)`.
<channel|><|tool_call>call:run_command{command:<|"|>python3 - <<'PY'
from amaranth import *
from amaranth.sim import Simulator
class DUT(Elaboratable):
def __init__(self):
self.mem = Memory(width=8, depth=8)
self.read_port = None
self.write_port = None
def elaborate(self, platform):
m = Module()
self.read_port = self.mem.read_port()
self.write_port = self.mem.write_port()
m.submodules.read_port = self.read_port
m.submodules.write_port = self.write_port
return m
def test_minimal():
dut = DUT()
def process():
yield dut.read_port.addr.eq(1)
yield dut.read_port.en.eq(1)
yield
val1 = yield dut.read_port.data
print(f"Read 1 (addr 1): {val1}")
yield
yield dut.write_port.addr.eq(2)
yield dut.write_port.data.eq(14)
yield dut.write_port.en.eq(1)
val2 = yield dut.read_port.data
print(f"Read 2 (addr 1, write addr 2): {val2}")
yield
yield dut.write_port.en.eq(0)
val3 = yield dut.read_port.data
print(f"Read 3 (addr 1, write en 0): {val3}")
yield
val4 = yield dut.read_port.data
print(f"Read 4 (addr 1): {val4}")
sim = Simulator(DUT())
sim.add_sync_process(process)
sim.run(steps=20)
if __name__ == "__main__":
test_minimal()
PY
<|"|>}<tool_call|><|tool_response>
Patch, tests and logs
Final code change Included
Test output Included
============================= test session starts ============================== collected 88 items tests/test_sim.py ...................................................... [ 61%] .................F................ [100%] =================================== FAILURES =================================== E AssertionError: 68 != 34 /usr/local/lib/python3.10/unittest/case.py:838: AssertionError: 68 != 34 ==================================== PASSES ==================================== - generated xml file: /tmp/rebench-grade-95840f6d41444ad4b1c11917a82ad4a2.xml -- =========================== short test summary info ============================ PASSED tests/test_sim.py::SimulatorUnitTestCase::test_abs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_add PASSED tests/test_sim.py::SimulatorUnitTestCase::test_all PASSED tests/test_sim.py::SimulatorUnitTestCase::test_and PASSED tests/test_sim.py::SimulatorUnitTestCase::test_any PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_attr PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_index PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_lhs_oob PASSED tests/test_sim.py::SimulatorUnitTestCase::test_array_oob PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_signed PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_signed_issue_502 PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_signed_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_unsigned PASSED tests/test_sim.py::SimulatorUnitTestCase::test_as_unsigned_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_bit_select PASSED tests/test_sim.py::SimulatorUnitTestCase::test_bit_select_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_bool PASSED tests/test_sim.py::SimulatorUnitTestCase::test_cat PASSED tests/test_sim.py::SimulatorUnitTestCase::test_cat_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_eq PASSED tests/test_sim.py::SimulatorUnitTestCase::test_floordiv PASSED tests/test_sim.py::SimulatorUnitTestCase::test_floordiv_neg PASSED tests/test_sim.py::SimulatorUnitTestCase::test_ge PASSED tests/test_sim.py::SimulatorUnitTestCase::test_gt PASSED tests/test_sim.py::SimulatorUnitTestCase::test_invert PASSED tests/test_sim.py::SimulatorUnitTestCase::test_le PASSED tests/test_sim.py::SimulatorUnitTestCase::test_lt PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mod PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mod_neg PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mul PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mux PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mux_invert PASSED tests/test_sim.py::SimulatorUnitTestCase::test_mux_wide PASSED tests/test_sim.py::SimulatorUnitTestCase::test_ne PASSED tests/test_sim.py::SimulatorUnitTestCase::test_neg PASSED tests/test_sim.py::SimulatorUnitTestCase::test_nested_cat_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_or PASSED tests/test_sim.py::SimulatorUnitTestCase::test_record PASSED tests/test_sim.py::SimulatorUnitTestCase::test_replicate PASSED tests/test_sim.py::SimulatorUnitTestCase::test_rotate_left PASSED tests/test_sim.py::SimulatorUnitTestCase::test_rotate_right PASSED tests/test_sim.py::SimulatorUnitTestCase::test_shift_left PASSED tests/test_sim.py::SimulatorUnitTestCase::test_shift_right PASSED tests/test_sim.py::SimulatorUnitTestCase::test_shl PASSED tests/test_sim.py::SimulatorUnitTestCase::test_shr PASSED tests/test_sim.py::SimulatorUnitTestCase::test_slice PASSED tests/test_sim.py::SimulatorUnitTestCase::test_slice_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_sub PASSED tests/test_sim.py::SimulatorUnitTestCase::test_word_select PASSED tests/test_sim.py::SimulatorUnitTestCase::test_word_select_lhs PASSED tests/test_sim.py::SimulatorUnitTestCase::test_xor_binary PASSED tests/test_sim.py::SimulatorUnitTestCase::test_xor_unary PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_clock_if_exists PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_clock_wrong_missing PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_clock_wrong_twice PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_process_wrong PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_add_process_wrong_generator PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_alu PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_clock_phase PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_command_wrong PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_complex_lhs_rhs PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_counter_clock_and_sync_process PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_counter_process PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_large_expr_parser_overflow PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_async_read_write PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_init PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_read_before_write PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_read_only PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_transparency_multibit PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_write PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_write_granularity PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_write_through PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_multiclock PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_no_negated_boolean_warning PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_reset PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_run_until PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_run_until_fail PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_sample_helpers PASSED tests/test_sim.py::SimulatorIntegrationTestCase::test_vcd_wrong_nonzero_time PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_325 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_473 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_566 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_588 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_595 PASSED tests/test_sim.py::SimulatorRegressionTestCase::test_bug_826 FAILED tests/test_sim.py::SimulatorIntegrationTestCase::test_memory_transparency_simple ========================= 1 failed, 87 passed in 0.49s =========================
Test errors Included
Test report (JUnit) Included
<?xml version="1.0" encoding="utf-8"?><testsuites name="pytest tests"><testsuite name="pytest" errors="0" failures="1" skipped="0" tests="88" time="0.487" timestamp="2026-11-14T02:47:57.244802+00:00" hostname="0e75e98e693d"><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_abs" time="0.016" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_add" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_all" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_and" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_any" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_attr" time="0.009" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_index" time="0.218" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_lhs" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_lhs_oob" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_array_oob" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_signed" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_signed_issue_502" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_signed_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_unsigned" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_as_unsigned_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_bit_select" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_bit_select_lhs" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_bool" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_cat" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_cat_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_eq" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_floordiv" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_floordiv_neg" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_ge" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_gt" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_invert" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_le" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_lt" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mod" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mod_neg" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mul" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mux" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mux_invert" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_mux_wide" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_ne" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_neg" time="0.003" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_nested_cat_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_or" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_record" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_replicate" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_rotate_left" time="0.010" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_rotate_right" time="0.010" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_shift_left" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_shift_right" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_shl" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_shr" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_slice" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_slice_lhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_sub" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_word_select" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_word_select_lhs" time="0.002" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_xor_binary" time="0.001" /><testcase classname="tests.test_sim.SimulatorUnitTestCase" name="test_xor_unary" time="0.003" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_clock_if_exists" time="0.000" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_clock_wrong_missing" time="0.000" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_clock_wrong_twice" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_process_wrong" time="0.000" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_add_process_wrong_generator" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_alu" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_clock_phase" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_command_wrong" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_complex_lhs_rhs" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_counter_clock_and_sync_process" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_counter_process" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_large_expr_parser_overflow" time="0.008" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_async_read_write" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_init" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_read_before_write" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_read_only" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_transparency_multibit" time="0.005" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_transparency_simple" time="0.002"><failure message="AssertionError: 68 != 34">E AssertionError: 68 != 34</failure></testcase><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_write" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_write_granularity" time="0.003" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_memory_write_through" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_multiclock" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_no_negated_boolean_warning" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_reset" time="0.001" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_run_until" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_run_until_fail" time="0.002" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_sample_helpers" time="0.005" /><testcase classname="tests.test_sim.SimulatorIntegrationTestCase" name="test_vcd_wrong_nonzero_time" time="0.001" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_325" time="0.000" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_473" time="0.000" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_566" time="0.001" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_588" time="0.001" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_595" time="0.001" /><testcase classname="tests.test_sim.SimulatorRegressionTestCase" name="test_bug_826" time="0.000" /></testsuite></testsuites>
Agent log Included
[ 0.0s] 📋 System Prompt: You are a principal Python software engineer resolving a repository issue in `/workspace`.
[ 0.0s] 🎯 Task Prompt: You are evaluating a software engineering task for repository amaranth-lang/amaranth.
[ 35.5s] 💭 (1903 chars) "The user is reporting a bug in `Memory` simulation in Amaranth.
According to the reproduction example:
- A `Memory` is c..."
[ 35.5s] 🔧 run_command grep -rn --include="*.py" "class Memory" .
[ 35.6s] → ./amaranth/hdl/mem.py:12:class Memory(Elaboratable):
[ 40.8s] 💭 (135 chars) "Okay, `amaranth/hdl/mem.py` defines `Memory`.
Now let's see how it's handled in simulation. I'll search for `Memory` in ..."
[ 40.8s] 🔧 run_command grep -rn "Memory" amaranth/sim | grep -v "import"
[ 40.9s] → error (exit 0):
[ 50.0s] 💭 (422 chars) "Wait, `grep` returned an error because `amaranth/sim` is a directory and I might have used
it incorrectly or there are n..."
[ 50.0s] 📖 read_file (amaranth/hdl/mem.py)
[ 50.0s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': 'import operator\nfrom collections import
OrderedDict\n\n…
[ 62.1s] 💭 (500 chars) "The `Memory` class in `amaranth/hdl/mem.py` creates an `_array` of `Signal`s if
`simulate=True`.
```python
# Arr..."
[ 62.1s] 📖 read_file (amaranth/hdl/mem.py)
[ 62.2s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': ' p_RD_ARST_VALUE=Const(0,
len(self._read_port…
[ 64.9s] 💭 (28 chars) "And the rest of `WritePort`:"
[ 64.9s] 📖 read_file (amaranth/hdl/mem.py)
[ 65.0s] ✓ {'status': 'ok', 'filepath': 'amaranth/hdl/mem.py', 'content': ' def __init__(self, memory, *,
domain="sync", granula…
[ 131.7s] 💭 (2447 chars) "The `Memory` class handles simulation by creating an array of `Signal`s.
In `elaborate`, it adds statements for read and..."
[ 131.7s] 📝 write_file (/tmp/repro.py, 43 lines)
[ 131.7s] ❌ {'status': 'error', 'error_type': 'FileWriteError', 'error_message': "Path traversal detected:
'/tmp/repro.py' escapes w…
[ 155.0s] 💭 (196 chars) "Ah, I cannot write to `/tmp/repro.py`. I must write to `/workspace/repro.py` or similar, but
then I must remove it befor..."
[ 155.0s] 🔧 run_command (44 lines) python3 - <<'PY'
[ 155.2s] → error (exit 0):
[ 157.7s] 💭 (105 chars) "It seems `TestCaseWithSimulator` is no longer in `amaranth.sim`. Let me check
`amaranth/sim/__init__.py`."
[ 157.7s] 📖 read_file (amaranth/sim/__init__.py)
[ 157.7s] ✓ {'status': 'ok', 'filepath': 'amaranth/sim/__init__.py', 'content': 'from .core import *\n\n\n__all__ =
["Settle", "Dela…
[ 161.8s] 💭 (196 chars) "Okay, `TestCaseWithSimulator` is not there. The provided reproduction code might be for an
older version of Amaranth.
L..."
[ 161.8s] 📖 read_file (tests/test_hdl_mem.py)
[ 161.8s] ✓ {'status': 'ok', 'filepath': 'tests/test_hdl_mem.py', 'content': '# amaranth:
UnusedElaboratable=no\n\nfrom amaranth.hdl…
[ 194.3s] 💭 (335 chars) "The tests in `tests/test_hdl_mem.py` only test the structure of `Memory`, not the actual
simulation.
I need to find wher..."
[ 194.3s] 🔧 run_command (51 lines) python3 - <<'PY'
[ 284.3s] → error (exit 0):
[ 316.2s] 💭 (512 chars) "The simulation timed out. This might be because `sim.run()` without arguments runs forever
if there are processes. I sho..."
[ 316.2s] 🔧 run_command (52 lines) python3 - <<'PY'
[ 406.2s] → error (exit 0):
[ 436.5s] 💭 (462 chars) "Still timing out. I suspect something in the simulation engine is taking too long or the
`DUT` is not being elaborated c..."
[ 436.5s] 🔧 run_command (51 lines) python3 - <<'PY'
[ 436.6s] → error (exit 0):
Native result row
{
"agent_error": "Agent exceeded session timeout (7.5 min)",
"duration_seconds": 452.86,
"error": "Empty agent patch",
"grade": {
"error": "Empty agent patch",
"resolved": false,
"strict_clean_patch": false,
"test_exit_code": -1
},
"instance_id": "amaranth-lang__amaranth-923",
"pass_idx": 0,
"patch_chars": 0,
"phase1_seconds": 452.86,
"repo": "amaranth-lang/amaranth",
"request_log_path": "/kaggle-root/working/r31/rollouts_X/requests/amaranth-lang__amaranth-923__p0__r7.jsonl",
"resolved": false,
"rollout_idx": 7,
"run_key": "amaranth-lang__amaranth-923__p0__r7",
"strict_clean_patch": false,
"tool_calls": 12,
"total_llm_calls": 12,
"trace_path": "/kaggle-root/working/r31/rollouts_X/traces/trace_amaranth-lang__amaranth-923__p0__r7.json"
}