ddb97f1deb
Add a new '[,dump-guest-core=on|off]' option to the '-machine' option. When
'dump-guest-core=off' is specified, guest memory is omitted from the core dump.
The default behavior continues to be to include guest memory when a core dump is
triggered. In my testing, this brought the core dump size down from 384MB to 6MB
on a 2GB guest.
Is anything additional required to preserve this setting for migration or
savevm? I don't believe so.
Changelog:
v3:
Eliminate globals as per Anthony's suggestion
set no dump from qemu_ram_remap() as well
v2:
move the option from -m to -machine, rename option dump -> dump-guest-core
Signed-off-by: Jason Baron <jbaron@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
169 lines
4.1 KiB
C
169 lines
4.1 KiB
C
#ifndef QEMU_OSDEP_H
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#define QEMU_OSDEP_H
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdbool.h>
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#ifdef __OpenBSD__
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#include <sys/types.h>
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#include <sys/signal.h>
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#endif
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#include <sys/time.h>
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#if defined(CONFIG_SOLARIS) && CONFIG_SOLARIS_VERSION < 10
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/* [u]int_fast*_t not in <sys/int_types.h> */
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typedef unsigned char uint_fast8_t;
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typedef unsigned int uint_fast16_t;
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typedef signed int int_fast16_t;
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#endif
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#ifndef glue
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#define xglue(x, y) x ## y
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#define glue(x, y) xglue(x, y)
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#define stringify(s) tostring(s)
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#define tostring(s) #s
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#endif
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#ifndef likely
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#if __GNUC__ < 3
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#define __builtin_expect(x, n) (x)
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#endif
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#define likely(x) __builtin_expect(!!(x), 1)
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#define unlikely(x) __builtin_expect(!!(x), 0)
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#endif
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#ifndef container_of
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#define container_of(ptr, type, member) ({ \
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const typeof(((type *) 0)->member) *__mptr = (ptr); \
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(type *) ((char *) __mptr - offsetof(type, member));})
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#endif
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/* Convert from a base type to a parent type, with compile time checking. */
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#ifdef __GNUC__
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#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
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char __attribute__((unused)) offset_must_be_zero[ \
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-offsetof(type, field)]; \
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container_of(dev, type, field);}))
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#else
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#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
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#endif
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#define typeof_field(type, field) typeof(((type *)0)->field)
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#define type_check(t1,t2) ((t1*)0 - (t2*)0)
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#ifndef MIN
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#define MIN(a, b) (((a) < (b)) ? (a) : (b))
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#endif
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#ifndef MAX
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#define MAX(a, b) (((a) > (b)) ? (a) : (b))
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#endif
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#ifndef DIV_ROUND_UP
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#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
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#endif
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#ifndef ARRAY_SIZE
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#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
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#endif
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#ifndef always_inline
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#if !((__GNUC__ < 3) || defined(__APPLE__))
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#ifdef __OPTIMIZE__
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#undef inline
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#define inline __attribute__ (( always_inline )) __inline__
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#endif
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#endif
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#else
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#undef inline
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#define inline always_inline
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#endif
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#define qemu_printf printf
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int qemu_daemon(int nochdir, int noclose);
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void *qemu_memalign(size_t alignment, size_t size);
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void *qemu_vmalloc(size_t size);
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void qemu_vfree(void *ptr);
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#define QEMU_MADV_INVALID -1
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#if defined(CONFIG_MADVISE)
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#define QEMU_MADV_WILLNEED MADV_WILLNEED
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#define QEMU_MADV_DONTNEED MADV_DONTNEED
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#ifdef MADV_DONTFORK
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#define QEMU_MADV_DONTFORK MADV_DONTFORK
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#else
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#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
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#endif
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#ifdef MADV_MERGEABLE
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#define QEMU_MADV_MERGEABLE MADV_MERGEABLE
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#else
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#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
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#endif
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#ifdef MADV_DONTDUMP
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#define QEMU_MADV_DONTDUMP MADV_DONTDUMP
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#else
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#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
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#endif
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#elif defined(CONFIG_POSIX_MADVISE)
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#define QEMU_MADV_WILLNEED POSIX_MADV_WILLNEED
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#define QEMU_MADV_DONTNEED POSIX_MADV_DONTNEED
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#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
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#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
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#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
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#else /* no-op */
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#define QEMU_MADV_WILLNEED QEMU_MADV_INVALID
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#define QEMU_MADV_DONTNEED QEMU_MADV_INVALID
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#define QEMU_MADV_DONTFORK QEMU_MADV_INVALID
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#define QEMU_MADV_MERGEABLE QEMU_MADV_INVALID
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#define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID
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#endif
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int qemu_madvise(void *addr, size_t len, int advice);
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#if defined(__HAIKU__) && defined(__i386__)
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#define FMT_pid "%ld"
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#elif defined(WIN64)
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#define FMT_pid "%" PRId64
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#else
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#define FMT_pid "%d"
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#endif
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int qemu_create_pidfile(const char *filename);
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int qemu_get_thread_id(void);
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#ifdef _WIN32
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static inline void qemu_timersub(const struct timeval *val1,
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const struct timeval *val2,
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struct timeval *res)
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{
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res->tv_sec = val1->tv_sec - val2->tv_sec;
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if (val1->tv_usec < val2->tv_usec) {
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res->tv_sec--;
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res->tv_usec = val1->tv_usec - val2->tv_usec + 1000 * 1000;
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} else {
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res->tv_usec = val1->tv_usec - val2->tv_usec;
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}
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}
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#else
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#define qemu_timersub timersub
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#endif
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void qemu_set_cloexec(int fd);
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void qemu_set_version(const char *);
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const char *qemu_get_version(void);
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void fips_set_state(bool requested);
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bool fips_get_state(void);
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#endif
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