2015-01-07 08:38:00 +08:00
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//===-- lsan_flags.inc ------------------------------------------*- 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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//
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// LSan runtime flags.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LSAN_FLAG
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# error "Define LSAN_FLAG prior to including this file!"
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#endif
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// LSAN_FLAG(Type, Name, DefaultValue, Description)
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// See COMMON_FLAG in sanitizer_flags.inc for more details.
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LSAN_FLAG(bool, report_objects, false,
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"Print addresses of leaked objects after main leak report.")
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LSAN_FLAG(
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int, resolution, 0,
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"Aggregate two objects into one leak if this many stack frames match. If "
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"zero, the entire stack trace must match.")
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LSAN_FLAG(int, max_leaks, 0, "The number of leaks reported.")
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// Flags controlling the root set of reachable memory.
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LSAN_FLAG(bool, use_globals, true,
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"Root set: include global variables (.data and .bss)")
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LSAN_FLAG(bool, use_stacks, true, "Root set: include thread stacks")
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LSAN_FLAG(bool, use_registers, true, "Root set: include thread registers")
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Implement tls scanning for darwin LSan
Summary:
This required for any users who call exit() after creating
thread-specific data, as tls destructors are only called when
pthread_exit() or pthread_cancel() are used. This should also
match tls behavior on linux.
Getting the base address of the tls section is straightforward,
as it's stored as a section offset in %gs. The size is a bit trickier
to work out, as there doesn't appear to be any official documentation
or source code referring to it. The size used in this patch was determined
by taking the difference between the base address and the address of the
subsequent memory region returned by vm_region_recurse_64, which was
1024 * sizeof(uptr) on all threads except the main thread, where it was
larger. Since the section must be the same size on all of the threads,
1024 * sizeof(uptr) seemed to be a reasonable size to use, barring
a more programtic way to get the size.
1024 seems like a reasonable number, given that PTHREAD_KEYS_MAX
is 512 on darwin, so pthread keys will fit inside the region while
leaving space for other tls data. A larger size would overflow the
memory region returned by vm_region_recurse_64, and a smaller size
wouldn't leave room for all the pthread keys. In addition, the
stress test added here passes, which means that we are scanning at
least the full set of possible pthread keys, and probably
the full tls section.
Reviewers: alekseyshl, kubamracek
Subscribers: krytarowski, llvm-commits
Differential Revision: https://reviews.llvm.org/D33215
llvm-svn: 303887
2017-05-26 01:41:13 +08:00
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LSAN_FLAG(bool, use_tls, true,
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2015-01-07 08:38:00 +08:00
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"Root set: include TLS and thread-specific storage")
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LSAN_FLAG(bool, use_root_regions, true,
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"Root set: include regions added via __lsan_register_root_region().")
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2016-01-15 03:16:05 +08:00
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LSAN_FLAG(bool, use_ld_allocations, true,
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"Root set: mark as reachable all allocations made from dynamic "
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"linker. This was the old way to handle dynamic TLS, and will "
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"be removed soon. Do not use this flag.")
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2015-01-07 08:38:00 +08:00
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LSAN_FLAG(bool, use_unaligned, false, "Consider unaligned pointers valid.")
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LSAN_FLAG(bool, use_poisoned, false,
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"Consider pointers found in poisoned memory to be valid.")
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LSAN_FLAG(bool, log_pointers, false, "Debug logging")
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LSAN_FLAG(bool, log_threads, false, "Debug logging")
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2015-02-21 01:41:59 +08:00
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LSAN_FLAG(const char *, suppressions, "", "Suppressions file name.")
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