6f1c26f222
Summary: Fuzzing targets that allocate/deallocate a lot of memory tend to consume a lot of RSS when ASan quarantine is enabled. Purging quarantine between iterations and returning memory to OS keeps RSS down and should not reduce the quarantine effectiveness provided the fuzz target does not preserve state between iterations (in this case this feature can be turned off). Based on D39153. Reviewers: vitalybuka Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D39155 llvm-svn: 316382
48 lines
2.2 KiB
Modula-2
48 lines
2.2 KiB
Modula-2
//===- FuzzerExtFunctions.def - External functions --------------*- C++ -* ===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// This defines the external function pointers that
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// ``fuzzer::ExternalFunctions`` should contain and try to initialize. The
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// EXT_FUNC macro must be defined at the point of inclusion. The signature of
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// the macro is:
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//
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// EXT_FUNC(<name>, <return_type>, <function_signature>, <warn_if_missing>)
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//===----------------------------------------------------------------------===//
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// Optional user functions
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EXT_FUNC(LLVMFuzzerInitialize, int, (int *argc, char ***argv), false);
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EXT_FUNC(LLVMFuzzerCustomMutator, size_t,
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(uint8_t * Data, size_t Size, size_t MaxSize, unsigned int Seed),
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false);
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EXT_FUNC(LLVMFuzzerCustomCrossOver, size_t,
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(const uint8_t * Data1, size_t Size1,
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const uint8_t * Data2, size_t Size2,
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uint8_t * Out, size_t MaxOutSize, unsigned int Seed),
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false);
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// Sanitizer functions
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EXT_FUNC(__lsan_enable, void, (), false);
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EXT_FUNC(__lsan_disable, void, (), false);
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EXT_FUNC(__lsan_do_recoverable_leak_check, int, (), false);
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EXT_FUNC(__sanitizer_install_malloc_and_free_hooks, int,
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(void (*malloc_hook)(const volatile void *, size_t),
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void (*free_hook)(const volatile void *)),
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false);
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EXT_FUNC(__sanitizer_purge_allocator, void, (), false);
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EXT_FUNC(__sanitizer_print_memory_profile, int, (size_t, size_t), false);
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EXT_FUNC(__sanitizer_print_stack_trace, void, (), true);
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EXT_FUNC(__sanitizer_symbolize_pc, void,
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(void *, const char *fmt, char *out_buf, size_t out_buf_size), false);
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EXT_FUNC(__sanitizer_get_module_and_offset_for_pc, int,
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(void *pc, char *module_path,
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size_t module_path_len,void **pc_offset), false);
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EXT_FUNC(__sanitizer_set_death_callback, void, (void (*)(void)), true);
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EXT_FUNC(__sanitizer_set_report_fd, void, (void*), false);
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EXT_FUNC(__sanitizer_dump_coverage, void, (const uintptr_t *, uintptr_t),
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false);
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