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MALLOPT(m_libc_dot_so_star, mallopt);
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// Documentation says:
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// malloc_trim(size_t pad);
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// If possible, gives memory back to the system (via negative arguments to
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// sbrk) if there is unused memory at the `high' end of the malloc pool.
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// You can call this after freeing large blocks of memory to potentially
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// reduce the system-level memory requirements of a program. However, it
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// cannot guarantee to reduce memory. Under some allocation patterns,
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// some large free blocks of memory will be locked between two used
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// chunks, so they cannot be given back to the system.
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// The `pad' argument to malloc_trim represents the amount of free
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// trailing space to leave untrimmed. If this argument is zero, only the
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// minimum amount of memory to maintain internal data structures will be
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// left (one page or less). Non-zero arguments can be supplied to maintain
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// enough trailing space to service future expected allocations without
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// having to re-obtain memory from the system.
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// Malloc_trim returns 1 if it actually released any memory, else 0. On
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// systems that do not support "negative sbrks", it will always return 0.
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// For simplicity, we always return 0.
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#define MALLOC_TRIM(soname, fnname) \
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int VG_REPLACE_FUNCTION_ZU(soname, fnname) ( SizeT pad ); \
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int VG_REPLACE_FUNCTION_ZU(soname, fnname) ( SizeT pad ) \
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/* 0 denotes that malloc_trim() either wasn't able \
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to do anything, or was not implemented */ \
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MALLOC_TRIM(m_libc_dot_so_star, malloc_trim);
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396
#define POSIX_MEMALIGN(soname, fnname) \
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398
int VG_REPLACE_FUNCTION_ZU(soname, fnname) ( void **memptr, \
428
463
PANIC(m_libc_dot_so_star, pvalloc);
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464
PANIC(m_libc_dot_so_star, malloc_stats);
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PANIC(m_libc_dot_so_star, malloc_trim);
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465
PANIC(m_libc_dot_so_star, malloc_get_state);
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PANIC(m_libc_dot_so_star, malloc_set_state);
added
removed
coregrind/m_replacemalloc/vg_replace_malloc.c
