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Fix Bugs Automatically.

Spartan Check pairs deterministic static analysis with targeted AI repair to catch and fix real bugs in your embedded C/C++ firmware (BARR-C, CERT-C/C++, and ANSSI-C).
Zero hallucinations. Zero compromises.

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BARR-C:2018 CERT-C / C++ ANSSI-C
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ESC Firmware v2.4

hW8EnBmojMUJXfcvWw3s
DONE
3 Findings Total

Target: c11 / arm32-wchar_t4 • Environment: Bare-Metal (bm)

Active File:src/motor_controller.c(1)L39:24
Finding 1 of 3
ERROR

Signed Literal Bit Shift Overflow

src/motor_controller.c : Line 39

Standards:
... ... --- a/src/motor_controller.c
... ... +++ b/src/motor_controller.c
... ... @@ -37,5 +37,5 @@
37 37 void calibrate_esc_timing(uint32_t pulse_raw) {
38 38 /* Narrowing and sign-bit hazard */
39 - - uint16_t offset = 1 << 15;
+ 39 + uint16_t offset = 1U << 15;
40 40 target_pwm += (pulse_raw >> 4) + offset;
41 41 }

Technical Explanation

Shifting a signed integer literal (1 << 15) into the sign bit is undefined behavior in C. On 16-bit and 32-bit targets, compilers can miscompile this during loop optimization.

Remediation Strategy

Use an unsigned literal (1U << 15) instead of a signed 1 so the bit shift runs using well-defined unsigned arithmetic.

Three Ways to Audit Your Firmware in Seconds

Audit a release commit across a full repository, validate a local build tree, or test an isolated interrupt routine without touching your build scripts or CI pipeline.

Git Integration

Connect a Repo or Pin a Commit

GitHub GitLab Bitbucket Codeberg SHA-1 Pinning

Link your public repository URL once at the project level. Audit the latest HEAD of your default branch in one click, or pin any 7 to 40 character Commit SHA-1 for reproducible release and compliance audits.

Workspace Upload

Drop in a Local Project Folder

.c / .cpp / .h / .hpp Auto-Filtered Ignore Rules

Drag and drop an entire firmware directory straight from your workstation. Spartan Check automatically filters for C/C++ source and header files while skipping vendor SDKs, .git folders, and build artifacts before encrypted upload.

Rapid Triage

Paste a Snippet for Quick Triage

Single File Paste & Scan Instant Diffs

Paste a C/C++ routine or drop a single file directly into the scanner to check compliance and preview AI-generated fixes in seconds.

The Spartan Check Architecture

LLMs should never guess whether your firmware is safe. We use a deterministic rule engine to prove where the bug is first, then use specialized AI agents only to validate context and write the patch.

Deterministic Core, Zero Hallucinations Proven Detection

Generic AI tools hallucinate because they try to guess how entire systems work. Spartan Check avoids this completely: a formal deterministic rule engine finds every violation first, and our AI agents only work on confirmed defects.

Stage 01

Pinpoint the Bug

BARR-C CERT ANSSI

First, our deterministic engine checks your code against formal embedded standards. Because it is strictly rule-based, it catches real violations without guessing.

Stage 02

Map the Surrounding Code

Deep Context Scope Aware

Instead of feeding an LLM a blind 10-line snippet, we extract the full function, types, and execution path around the defect.

Stage 03

The Judge (Filter the Noise)

Zero Noise Sub-Second Triage

Traditional static analyzers drown you in false positives. The Judge checks edge cases and concurrency in milliseconds so your team only sees issues that actually matter.

Stage 04

The Fixer (Write the Patch)

Project-Aligned Unified Diffs

Finally, The Fixer writes a clean, ready-to-merge diff that matches your codebase's style and target constraints.

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