experimental: add test-to-harness conversion logic #495
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Signed-off-by: David Korczynski <[email protected]>
Signed-off-by: David Korczynski <[email protected]>
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/gcbrun skip |
Signed-off-by: David Korczynski <[email protected]>
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/gcbrun skip |
DonggeLiu
approved these changes
Jul 17, 2024
| name = 'TestConverterPrompt' | ||
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| def __init__(self, introspector_report: Dict[str, Any], | ||
| all_header_files: List[str], test_dir: str): |
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nit: dict[...] and list[...] in lower cases. Same below.
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Can't do, see here: #454 (comment)
| # was found empirically to be valuable. | ||
| macros_defined_in_test = [] | ||
| for line in test_case.test_content.split('\n'): | ||
| if '#define' in line and len(line.split(' ')) == 2: |
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Nit: Maybe exclude commented lines later?
// #define a b
/*
#define a b
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I'll leave this for now -- it works well but ultimately I would want some stronger logic for macros (e.g. using IR/AST stuff). Will leave as is and monitor if it shows up as a limitation.
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/gcbrun skip |
Signed-off-by: David Korczynski <[email protected]>
arthurscchan
pushed a commit
to arthurscchan/oss-fuzz-gen
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Jul 24, 2024
Adds a fuzz harness heuristic that relies on converting existing tests. At this stage, it's done without relying on FI, we simply (1) find tests files in the target project; (2) read them; (3) for each test file we use a simple prompt to convert it into a harness. At this stage, it already out-performs on some existing projects, e.g: https://github.com/jkuhlmann/cgltf/blob/master/test/main.c In this case, we have a harness generated that looks quite nice: ```c // Heuristic: TestConverterPrompt :: Target: #include <stdlib.h> #include <stdint.h> #include <stdio.h> #include <string.h> #define CGLTF_IMPLEMENTATION #include "cgltf.h" extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) { if (size < 1) { return 0; } cgltf_options options; memset(&options, 0, sizeof(cgltf_options)); cgltf_data* parsed_data = NULL; cgltf_result result; // Parse input data result = cgltf_parse(&options, data, size, &parsed_data); if (result == cgltf_result_success) { result = cgltf_validate(parsed_data); } if (result == cgltf_result_success) { // Use the parsed data in some way // For example, print file type and mesh count printf("Type: %u\n", parsed_data->file_type); printf("Meshes: %u\n", (unsigned)parsed_data->meshes_count); } cgltf_free(parsed_data); return 0; } ``` Ref: google#494 --------- Signed-off-by: David Korczynski <[email protected]>
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Adds a fuzz harness heuristic that relies on converting existing tests. At this stage, it's done without relying on FI, we simply (1) find tests files in the target project; (2) read them; (3) for each test file we use a simple prompt to convert it into a harness.
At this stage, it already out-performs on some existing projects, e.g: https://github.com/jkuhlmann/cgltf/blob/master/test/main.c
In this case, we have a harness generated that looks quite nice:
Ref: #494