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author | Florian Weimer <fweimer@redhat.com> | 2016-05-13 14:16:39 +0200 |
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committer | Florian Weimer <fweimer@redhat.com> | 2016-05-13 14:16:39 +0200 |
commit | 4cf6c72fd2a482e7499c29162349810029632c3f (patch) | |
tree | 4c6a45d1e76bb4eb1afdfb39cf96a2b2c5751753 /sysdeps/x86 | |
parent | 567c710bcad634bc94a21f00b9e1c24ca9f9f57c (diff) | |
download | glibc-4cf6c72fd2a482e7499c29162349810029632c3f.tar.gz glibc-4cf6c72fd2a482e7499c29162349810029632c3f.tar.xz glibc-4cf6c72fd2a482e7499c29162349810029632c3f.zip |
malloc: Rewrite dumped heap for compatibility in __malloc_set_state
This will allow us to change many aspects of the malloc implementation while preserving compatibility with existing Emacs binaries. As a result, existing Emacs binaries will have a larger RSS, and Emacs needs a few more milliseconds to start. This overhead is specific to Emacs (and will go away once Emacs switches to its internal malloc). The new checks to make free and realloc compatible with the dumped heap are confined to the mmap paths, which are already quite slow due to the munmap overhead. This commit weakens some security checks, but only for heap pointers in the dumped main arena. By default, this area is empty, so those checks are as effective as before.
Diffstat (limited to 'sysdeps/x86')
0 files changed, 0 insertions, 0 deletions