在use-after-free之后,内存区域被分配,使用,释放,然后由于错误而再次使用。 在这种情况下,如果我们知道区域的大小,我们可以操作堆,以便在再次使用之前将我们自己选择的数据放置在 run 释放的 region 的内存槽中。 在随后的错误使用后,该 region 现在拥有可以帮助我们劫持执行流程的数据。 为了探索jemalloc的行为并将...
Refactor atomic and prng APIs to restore support for 32-bit platforms that use pre-C11 toolchains, e.g. FreeBSD's mips. (@jasone) Assets3 05 Nov 00:58 jasone 4.3.0 9bef119 Compare 4.3.0 This is the first release that passes the test suite for multiple Windows configurations, thanks...
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*/ malloc_mutex_t huge_mtx; /* * Trees of chunks that were previously allocated (trees differ only in * node ordering). These are used when allocating chunks, in an attempt * to re-use address space. Depending on function, different tree * orderings are needed, which is why there are...
dnl Do not check for use-after-free by default. AC_ARG_ENABLE([uaf-detection], [AS_HELP_STRING([--enable-uaf-detection], [Allow sampled junk-filling on deallocation to detect use-after-free])], [if test "x$enable_uaf_detection" = "xno" ; then enable_uaf_detection="0" ...
如今,为了追求性能,程序员经常使用手动内存管理,通过cgo机制调用malloc/free。 我主要对在我的一个项目中使用 jemalloc 感兴趣。 从 Go 调用是相当容易的。 #include "cmem.h" #include <jemalloc/jemalloc.h> void *cmem_malloc(size_t sz) { return je_malloc(sz); } void cmem_free(void *p) { ...
- ) # Use stdin as input. break ;; -* ) echo "$me: invalid option $1$help" exit 1 ;; *local*) # First pass through any local machine types. echo $1 exit ;; * ) break ;; esac done case $# in 0) echo "$me: missing argument$help" >&2 exit ...
(For the time being, the application is finished with the given range, so the kernel can free resources associated with it.) After a successful MADV_DONTNEED operation, the semantics of memory access in the specified region are changed: subsequent accesses of pages in the range will s...
jemalloc has always been able to print detailed internal statistics in human-readable form at application exit, but this is of limited use for long-running server applications, so we exposedmalloc_stats_print()such that it can be called repeatedly by the application. Unfortunately this still impos...
* to re-use address space. Depending on function, different tree * orderings are needed, which is why there are two trees with the same * contents.*/extent_tree_t chunks_szad_cached; extent_tree_t chunks_ad_cached; extent_tree_t chunks_szad_retained; ...