diff options
Diffstat (limited to 'malloc/memusage.c')
| -rw-r--r-- | malloc/memusage.c | 254 |
1 files changed, 249 insertions, 5 deletions
diff --git a/malloc/memusage.c b/malloc/memusage.c index b35444da10..2afe4d289c 100644 --- a/malloc/memusage.c +++ b/malloc/memusage.c @@ -1,5 +1,5 @@ /* Profile heap and stack memory usage of running program. - Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. + Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. @@ -23,10 +23,12 @@ #include <fcntl.h> #include <inttypes.h> #include <signal.h> +#include <stdbool.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> +#include <sys/mman.h> #include <sys/time.h> #include <memusage.h> @@ -38,12 +40,21 @@ static void *(*reallocp) (void *, size_t); static void *(*callocp) (size_t, size_t); static void (*freep) (void *); +static void *(*mmapp) (void *, size_t, int, int, int, off_t); +static void *(*mmap64p) (void *, size_t, int, int, int, off64_t); +static int (*munmapp) (void *, size_t); +static void *(*mremapp) (void *, size_t, size_t, int); + enum { idx_malloc = 0, idx_realloc, idx_calloc, idx_free, + idx_mmap_r, + idx_mmap_w, + idx_mremap, + idx_munmap, idx_last }; @@ -66,6 +77,8 @@ static unsigned long int large; static unsigned long int calls_total; static unsigned long int inplace; static unsigned long int decreasing; +static unsigned long int inplace_mremap; +static unsigned long int decreasing_mremap; static long int current_use[2]; static long int peak_use[3]; static uintptr_t start_sp; @@ -82,8 +95,9 @@ static size_t buffer_size; static int fd = -1; -static int not_me; +static bool not_me; static int initialized; +static bool trace_mmap; extern const char *__progname; struct entry @@ -186,6 +200,15 @@ me (void) reallocp = (void *(*) (void *, size_t)) dlsym (RTLD_NEXT, "realloc"); callocp = (void *(*) (size_t, size_t)) dlsym (RTLD_NEXT, "calloc"); freep = (void (*) (void *)) dlsym (RTLD_NEXT, "free"); + + mmapp = (void *(*) (void *, size_t, int, int, int, off_t)) dlsym (RTLD_NEXT, + "mmap"); + mmap64p = + (void *(*) (void *, size_t, int, int, int, off64_t)) dlsym (RTLD_NEXT, + "mmap64"); + mremapp = (void *(*) (void *, size_t, size_t, int)) dlsym (RTLD_NEXT, + "mremap"); + munmapp = (int (*) (void *, size_t)) dlsym (RTLD_NEXT, "munmap"); initialized = 1; if (env != NULL) @@ -194,7 +217,7 @@ me (void) size_t len = strlen (env); if (len > prog_len || strcmp (env, &__progname[prog_len - len]) != 0 || (prog_len != len && __progname[prog_len - len - 1] != '/')) - not_me = 1; + not_me = true; } /* Only open the file if it's really us. */ @@ -214,7 +237,7 @@ me (void) if (fd == -1) /* Don't do anything in future calls if we cannot write to the output file. */ - not_me = 1; + not_me = true; else { /* Write the first entry. */ @@ -255,6 +278,9 @@ me (void) } } } + + if (!not_me && getenv ("MEMUSAGE_TRACE_MMAP") != NULL) + trace_mmap = true; } } @@ -496,6 +522,208 @@ free (void *ptr) } +/* `mmap' replacement. We do not have to keep track of the sizesince + `munmap' will get it as a parameter. */ +void * +mmap (void *start, size_t len, int prot, int flags, int fd, off_t offset) +{ + void *result = NULL; + + /* Determine real implementation if not already happened. */ + if (__builtin_expect (initialized <= 0, 0)) + { + if (initialized == -1) + return NULL; + me (); + } + + /* Always get a block. We don't need extra memory. */ + result = (*mmapp) (start, len, prot, flags, fd, offset); + + if (!not_me && trace_mmap) + { + int idx = prot & PROT_WRITE ? idx_mmap_w : idx_mmap_r; + + /* Keep track of number of calls. */ + ++calls[idx]; + /* Keep track of total memory consumption for `malloc'. */ + total[idx] += len; + /* Keep track of total memory requirement. */ + grand_total += len; + /* Remember the size of the request. */ + if (len < 65536) + ++histogram[len / 16]; + else + ++large; + /* Total number of calls of any of the functions. */ + ++calls_total; + + /* Check for failures. */ + if (result == NULL) + ++failed[idx]; + else if (idx == idx_mmap_w) + /* Update the allocation data and write out the records if + necessary. Note the first parameter is NULL which means + the size is not tracked. */ + update_data (NULL, len, 0); + } + + /* Return the pointer to the user buffer. */ + return result; +} + + +/* `mmap' replacement. We do not have to keep track of the sizesince + `munmap' will get it as a parameter. */ +void * +mmap64 (void *start, size_t len, int prot, int flags, int fd, off64_t offset) +{ + void *result = NULL; + + /* Determine real implementation if not already happened. */ + if (__builtin_expect (initialized <= 0, 0)) + { + if (initialized == -1) + return NULL; + me (); + } + + /* Always get a block. We don't need extra memory. */ + result = (*mmap64p) (start, len, prot, flags, fd, offset); + + if (!not_me && trace_mmap) + { + int idx = prot & PROT_WRITE ? idx_mmap_w : idx_mmap_r; + + /* Keep track of number of calls. */ + ++calls[idx]; + /* Keep track of total memory consumption for `malloc'. */ + total[idx] += len; + /* Keep track of total memory requirement. */ + grand_total += len; + /* Remember the size of the request. */ + if (len < 65536) + ++histogram[len / 16]; + else + ++large; + /* Total number of calls of any of the functions. */ + ++calls_total; + + /* Check for failures. */ + if (result == NULL) + ++failed[idx]; + else if (idx == idx_mmap_w) + /* Update the allocation data and write out the records if + necessary. Note the first parameter is NULL which means + the size is not tracked. */ + update_data (NULL, len, 0); + } + + /* Return the pointer to the user buffer. */ + return result; +} + + +/* `mmap' replacement. We do not have to keep track of the sizesince + `munmap' will get it as a parameter. */ +void * +mremap (void *start, size_t old_len, size_t len, int flags) +{ + void *result = NULL; + + /* Determine real implementation if not already happened. */ + if (__builtin_expect (initialized <= 0, 0)) + { + if (initialized == -1) + return NULL; + me (); + } + + /* Always get a block. We don't need extra memory. */ + result = (*mremapp) (start, old_len, len, flags); + + if (!not_me && trace_mmap) + { + /* Keep track of number of calls. */ + ++calls[idx_mremap]; + if (len > old_len) + { + /* Keep track of total memory consumption for `malloc'. */ + total[idx_mremap] += len - old_len; + /* Keep track of total memory requirement. */ + grand_total += len - old_len; + } + /* Remember the size of the request. */ + if (len < 65536) + ++histogram[len / 16]; + else + ++large; + /* Total number of calls of any of the functions. */ + ++calls_total; + + /* Check for failures. */ + if (result == NULL) + ++failed[idx_mremap]; + else + { + /* Record whether the reduction/increase happened in place. */ + if (start == result) + ++inplace_mremap; + /* Was the buffer increased? */ + if (old_len > len) + ++decreasing_mremap; + + /* Update the allocation data and write out the records if + necessary. Note the first parameter is NULL which means + the size is not tracked. */ + update_data (NULL, len, old_len); + } + } + + /* Return the pointer to the user buffer. */ + return result; +} + + +/* `munmap' replacement. */ +int +munmap (void *start, size_t len) +{ + int result; + + /* Determine real implementation if not already happened. */ + if (__builtin_expect (initialized <= 0, 0)) + { + if (initialized == -1) + return -1; + me (); + } + + /* Do the real work. */ + result = (*munmapp) (start, len); + + if (!not_me && trace_mmap) + { + /* Keep track of number of calls. */ + ++calls[idx_munmap]; + + if (__builtin_expect (result == 0, 1)) + { + /* Keep track of total memory freed using `free'. */ + total[idx_munmap] += len; + + /* Update the allocation data and write out the records if + necessary. */ + update_data (NULL, 0, len); + } + else + ++failed[idx_munmap]; + } + + return result; +} + + /* Write some statistics to standard error. */ static void __attribute__ ((destructor)) @@ -508,7 +736,7 @@ dest (void) if (not_me) return; /* If we should call any of the memory functions don't do any profiling. */ - not_me = 1; + not_me = true; /* Finish the output file. */ if (fd != -1) @@ -552,6 +780,22 @@ dest (void) failed[idx_calloc] ? "\e[01;41m" : "", failed[idx_calloc], calls[idx_free], total[idx_free]); + if (trace_mmap) + fprintf (stderr, "\ +\e[00;34mmmap(r)|\e[0m %10lu %12llu %s%12lu\e[00;00m\n\ +\e[00;34mmmap(w)|\e[0m %10lu %12llu %s%12lu\e[00;00m\n\ +\e[00;34m mremap|\e[0m %10lu %12llu %s%12lu\e[00;00m (in place: %ld, dec: %ld)\n\ +\e[00;34m munmap|\e[0m %10lu %12llu %s%12lu\e[00;00m\n", + calls[idx_mmap_r], total[idx_mmap_r], + failed[idx_mmap_r] ? "\e[01;41m" : "", failed[idx_mmap_r], + calls[idx_mmap_w], total[idx_mmap_w], + failed[idx_mmap_w] ? "\e[01;41m" : "", failed[idx_mmap_w], + calls[idx_mremap], total[idx_mremap], + failed[idx_mremap] ? "\e[01;41m" : "", failed[idx_mremap], + inplace_mremap, decreasing_mremap, + calls[idx_munmap], total[idx_munmap], + failed[idx_munmap] ? "\e[01;41m" : "", failed[idx_munmap]); + /* Write out a histoogram of the sizes of the allocations. */ fprintf (stderr, "\e[01;32mHistogram for block sizes:\e[0;0m\n"); |