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Fuchsia doesn't have /proc/id/maps, so it relies on the kernel logging system to provide the DSO map to be able to symbolize in the context of ASLR. The DSO map is logged automatically on Fuchsia when encountering a crash or writing to the sanitizer log for the first time in a process. There are several cases where libFuzzer doesn't encounter a crash, e.g. on timeouts, OOMs, and when configured to print new PCs as they become covered, to name a few. Therefore, this change always writes to the sanitizer log on startup to ensure the DSO map is available in the log. Author: aarongreen Differential Revision: https://reviews.llvm.org/D66233 llvm-svn: 372056
51 lines
2.5 KiB
Modula-2
51 lines
2.5 KiB
Modula-2
//===- FuzzerExtFunctions.def - External functions --------------*- C++ -* ===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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_acquire_crash_state, int, (), true);
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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_log_write, void, (const char *buf, size_t len), false);
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EXT_FUNC(__sanitizer_purge_allocator, void, (), false);
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EXT_FUNC(__sanitizer_print_memory_profile, void, (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(__msan_scoped_disable_interceptor_checks, void, (), false);
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EXT_FUNC(__msan_scoped_enable_interceptor_checks, void, (), false);
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EXT_FUNC(__msan_unpoison, void, (const volatile void *, size_t size), false);
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EXT_FUNC(__msan_unpoison_param, void, (size_t n), false);
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