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# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
# vim: set filetype=python:
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at
@depends(target, js_package)
def jemalloc_default(target, js_package):
if js_package:
return False
return target.kernel in ("Darwin", "Linux", "WINNT")
help="{Replace|Do not replace} memory allocator with jemalloc",
set_config("MOZ_MEMORY", True, when="--enable-jemalloc")
set_define("MOZ_MEMORY", True, when="--enable-jemalloc")
add_old_configure_assignment("MOZ_MEMORY", True, when="--enable-jemalloc")
@depends(milestone, build_project)
def replace_malloc_default(milestone, build_project):
if build_project == "memory":
return True
if milestone.is_early_beta_or_earlier and build_project != "js":
return True
help="{Enable|Disable} ability to dynamically replace the malloc implementation",
set_config("MOZ_REPLACE_MALLOC", True, when="--enable-replace-malloc")
set_define("MOZ_REPLACE_MALLOC", True, when="--enable-replace-malloc")
@depends(build_project, when="--enable-replace-malloc")
def replace_malloc_static(build_project):
# Default to statically linking replace-malloc libraries that can be
# statically linked, except when building with --enable-project=memory.
if build_project != "memory":
return True
set_config("MOZ_REPLACE_MALLOC_STATIC", replace_malloc_static)
# PHC (Probabilistic Heap Checker)
# ==============================================================
# In general, it only makes sense for PHC to run on the platforms that have a
# crash reporter.
def phc_default(build_project, target):
if build_project == "js":
return False
# Both Linux32 and Win32 have frequent crashes when stack tracing (for
# unclear reasons), so PHC is enabled only on 64-bit only in both cases.
return (target.cpu in ("x86_64", "aarch64")) and (
(target.os == "GNU" and target.kernel == "Linux")
or (target.kernel == "WINNT")
or (target.os == "OSX")
help="{Enable|Disable} PHC (Probabilistic Memory Checker). "
"Also enables frame pointers when needed",
set_config("MOZ_PHC", True, when="--enable-phc")
# PHC parses stacks using frame pointers on these systems.
@depends("--enable-phc", target, have_unwind, when="--enable-jemalloc")
def phc_implies_frame_pointers(phc, target, have_unwind):
if not phc:
return False
# This should be kept in sync with the ifdefs in memory/build/PHC.cpp
# that control stack walking.
# This is true for the first two options in PHC.cpp
if (target.os == "WINNT" and target.cpu == "x86") or target.kernel == "Darwin":
return True
# This should match the #defines in mozglue/misc/StackWalk.cpp
if (target.cpu in ("x86", "ppc")) and (target.kernel in ("Darwin", "Linux")):
return not have_unwind
return False
imply_option("--enable-frame-pointers", True, when=phc_implies_frame_pointers)
with only_when(depends(target.os)(lambda os: os != "WINNT")):
set_define("HAVE_STRNDUP", check_symbol("strndup"))
set_define("HAVE_POSIX_MEMALIGN", check_symbol("posix_memalign"))
set_define("HAVE_MEMALIGN", check_symbol("memalign"))
set_define("HAVE_MALLOC_USABLE_SIZE", check_symbol("malloc_usable_size"))