summaryrefslogtreecommitdiff
path: root/libcurl/src/lib/memdebug.c
diff options
context:
space:
mode:
Diffstat (limited to 'libcurl/src/lib/memdebug.c')
-rw-r--r--libcurl/src/lib/memdebug.c489
1 files changed, 489 insertions, 0 deletions
diff --git a/libcurl/src/lib/memdebug.c b/libcurl/src/lib/memdebug.c
new file mode 100644
index 0000000..3b38a74
--- /dev/null
+++ b/libcurl/src/lib/memdebug.c
@@ -0,0 +1,489 @@
+/***************************************************************************
+ * _ _ ____ _
+ * Project ___| | | | _ \| |
+ * / __| | | | |_) | |
+ * | (__| |_| | _ <| |___
+ * \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+#include "curl_setup.h"
+
+#ifdef CURLDEBUG
+
+#include <curl/curl.h>
+
+#include "curl_printf.h"
+#include "urldata.h"
+
+#define MEMDEBUG_NODEFINES /* don't redefine the standard functions */
+#include "curl_memory.h"
+#include "memdebug.h"
+
+#ifndef HAVE_ASSERT_H
+# define assert(x) Curl_nop_stmt
+#endif
+
+/*
+ * Until 2011-08-17 libcurl's Memory Tracking feature also performed
+ * automatic malloc and free filling operations using 0xA5 and 0x13
+ * values. Our own preinitialization of dynamically allocated memory
+ * might be useful when not using third party memory debuggers, but
+ * on the other hand this would fool memory debuggers into thinking
+ * that all dynamically allocated memory is properly initialized.
+ *
+ * As a default setting, libcurl's Memory Tracking feature no longer
+ * performs preinitialization of dynamically allocated memory on its
+ * own. If you know what you are doing, and really want to retain old
+ * behavior, you can achieve this compiling with preprocessor symbols
+ * CURL_MT_MALLOC_FILL and CURL_MT_FREE_FILL defined with appropriate
+ * values.
+ */
+
+#ifdef CURL_MT_MALLOC_FILL
+# if (CURL_MT_MALLOC_FILL < 0) || (CURL_MT_MALLOC_FILL > 0xff)
+# error "invalid CURL_MT_MALLOC_FILL or out of range"
+# endif
+#endif
+
+#ifdef CURL_MT_FREE_FILL
+# if (CURL_MT_FREE_FILL < 0) || (CURL_MT_FREE_FILL > 0xff)
+# error "invalid CURL_MT_FREE_FILL or out of range"
+# endif
+#endif
+
+#if defined(CURL_MT_MALLOC_FILL) && defined(CURL_MT_FREE_FILL)
+# if (CURL_MT_MALLOC_FILL == CURL_MT_FREE_FILL)
+# error "CURL_MT_MALLOC_FILL same as CURL_MT_FREE_FILL"
+# endif
+#endif
+
+#ifdef CURL_MT_MALLOC_FILL
+# define mt_malloc_fill(buf,len) memset((buf), CURL_MT_MALLOC_FILL, (len))
+#else
+# define mt_malloc_fill(buf,len) Curl_nop_stmt
+#endif
+
+#ifdef CURL_MT_FREE_FILL
+# define mt_free_fill(buf,len) memset((buf), CURL_MT_FREE_FILL, (len))
+#else
+# define mt_free_fill(buf,len) Curl_nop_stmt
+#endif
+
+struct memdebug {
+ size_t size;
+ union {
+ curl_off_t o;
+ double d;
+ void * p;
+ } mem[1];
+ /* I'm hoping this is the thing with the strictest alignment
+ * requirements. That also means we waste some space :-( */
+};
+
+/*
+ * Note that these debug functions are very simple and they are meant to
+ * remain so. For advanced analysis, record a log file and write perl scripts
+ * to analyze them!
+ *
+ * Don't use these with multithreaded test programs!
+ */
+
+#define logfile curl_debuglogfile
+FILE *curl_debuglogfile = NULL;
+static bool memlimit = FALSE; /* enable memory limit */
+static long memsize = 0; /* set number of mallocs allowed */
+
+/* this sets the log file name */
+void curl_memdebug(const char *logname)
+{
+ if(!logfile) {
+ if(logname && *logname)
+ logfile = fopen(logname, "w");
+ else
+ logfile = stderr;
+#ifdef MEMDEBUG_LOG_SYNC
+ /* Flush the log file after every line so the log isn't lost in a crash */
+ setvbuf(logfile, (char *)NULL, _IOLBF, 0);
+#endif
+ }
+}
+
+/* This function sets the number of malloc() calls that should return
+ successfully! */
+void curl_memlimit(long limit)
+{
+ if(!memlimit) {
+ memlimit = TRUE;
+ memsize = limit;
+ }
+}
+
+/* returns TRUE if this isn't allowed! */
+static bool countcheck(const char *func, int line, const char *source)
+{
+ /* if source is NULL, then the call is made internally and this check
+ should not be made */
+ if(memlimit && source) {
+ if(!memsize) {
+ if(source) {
+ /* log to file */
+ curl_memlog("LIMIT %s:%d %s reached memlimit\n",
+ source, line, func);
+ /* log to stderr also */
+ fprintf(stderr, "LIMIT %s:%d %s reached memlimit\n",
+ source, line, func);
+ }
+ SET_ERRNO(ENOMEM);
+ return TRUE; /* RETURN ERROR! */
+ }
+ else
+ memsize--; /* countdown */
+
+ /* log the countdown */
+ if(source)
+ curl_memlog("LIMIT %s:%d %ld ALLOCS left\n",
+ source, line, memsize);
+
+ }
+
+ return FALSE; /* allow this */
+}
+
+void *curl_domalloc(size_t wantedsize, int line, const char *source)
+{
+ struct memdebug *mem;
+ size_t size;
+
+ assert(wantedsize != 0);
+
+ if(countcheck("malloc", line, source))
+ return NULL;
+
+ /* alloc at least 64 bytes */
+ size = sizeof(struct memdebug)+wantedsize;
+
+ mem = (Curl_cmalloc)(size);
+ if(mem) {
+ /* fill memory with junk */
+ mt_malloc_fill(mem->mem, wantedsize);
+ mem->size = wantedsize;
+ }
+
+ if(source)
+ curl_memlog("MEM %s:%d malloc(%zu) = %p\n",
+ source, line, wantedsize,
+ mem ? (void *)mem->mem : (void *)0);
+
+ return (mem ? mem->mem : NULL);
+}
+
+void *curl_docalloc(size_t wanted_elements, size_t wanted_size,
+ int line, const char *source)
+{
+ struct memdebug *mem;
+ size_t size, user_size;
+
+ assert(wanted_elements != 0);
+ assert(wanted_size != 0);
+
+ if(countcheck("calloc", line, source))
+ return NULL;
+
+ /* alloc at least 64 bytes */
+ user_size = wanted_size * wanted_elements;
+ size = sizeof(struct memdebug) + user_size;
+
+ mem = (Curl_ccalloc)(1, size);
+ if(mem)
+ mem->size = user_size;
+
+ if(source)
+ curl_memlog("MEM %s:%d calloc(%zu,%zu) = %p\n",
+ source, line, wanted_elements, wanted_size,
+ mem ? (void *)mem->mem : (void *)0);
+
+ return (mem ? mem->mem : NULL);
+}
+
+char *curl_dostrdup(const char *str, int line, const char *source)
+{
+ char *mem;
+ size_t len;
+
+ assert(str != NULL);
+
+ if(countcheck("strdup", line, source))
+ return NULL;
+
+ len=strlen(str)+1;
+
+ mem=curl_domalloc(len, 0, NULL); /* NULL prevents logging */
+ if(mem)
+ memcpy(mem, str, len);
+
+ if(source)
+ curl_memlog("MEM %s:%d strdup(%p) (%zu) = %p\n",
+ source, line, (void *)str, len, (void *)mem);
+
+ return mem;
+}
+
+#if defined(WIN32) && defined(UNICODE)
+wchar_t *curl_dowcsdup(const wchar_t *str, int line, const char *source)
+{
+ wchar_t *mem;
+ size_t wsiz, bsiz;
+
+ assert(str != NULL);
+
+ if(countcheck("wcsdup", line, source))
+ return NULL;
+
+ wsiz = wcslen(str) + 1;
+ bsiz = wsiz * sizeof(wchar_t);
+
+ mem = curl_domalloc(bsiz, 0, NULL); /* NULL prevents logging */
+ if(mem)
+ memcpy(mem, str, bsiz);
+
+ if(source)
+ curl_memlog("MEM %s:%d wcsdup(%p) (%zu) = %p\n",
+ source, line, (void *)str, bsiz, (void *)mem);
+
+ return mem;
+}
+#endif
+
+/* We provide a realloc() that accepts a NULL as pointer, which then
+ performs a malloc(). In order to work with ares. */
+void *curl_dorealloc(void *ptr, size_t wantedsize,
+ int line, const char *source)
+{
+ struct memdebug *mem=NULL;
+
+ size_t size = sizeof(struct memdebug)+wantedsize;
+
+ assert(wantedsize != 0);
+
+ if(countcheck("realloc", line, source))
+ return NULL;
+
+#ifdef __INTEL_COMPILER
+# pragma warning(push)
+# pragma warning(disable:1684)
+ /* 1684: conversion from pointer to same-sized integral type */
+#endif
+
+ if(ptr)
+ mem = (void *)((char *)ptr - offsetof(struct memdebug, mem));
+
+#ifdef __INTEL_COMPILER
+# pragma warning(pop)
+#endif
+
+ mem = (Curl_crealloc)(mem, size);
+ if(source)
+ curl_memlog("MEM %s:%d realloc(%p, %zu) = %p\n",
+ source, line, (void *)ptr, wantedsize,
+ mem ? (void *)mem->mem : (void *)0);
+
+ if(mem) {
+ mem->size = wantedsize;
+ return mem->mem;
+ }
+
+ return NULL;
+}
+
+void curl_dofree(void *ptr, int line, const char *source)
+{
+ struct memdebug *mem;
+
+ if(ptr) {
+
+#ifdef __INTEL_COMPILER
+# pragma warning(push)
+# pragma warning(disable:1684)
+ /* 1684: conversion from pointer to same-sized integral type */
+#endif
+
+ mem = (void *)((char *)ptr - offsetof(struct memdebug, mem));
+
+#ifdef __INTEL_COMPILER
+# pragma warning(pop)
+#endif
+
+ /* destroy */
+ mt_free_fill(mem->mem, mem->size);
+
+ /* free for real */
+ (Curl_cfree)(mem);
+ }
+
+ if(source)
+ curl_memlog("MEM %s:%d free(%p)\n", source, line, (void *)ptr);
+}
+
+curl_socket_t curl_socket(int domain, int type, int protocol,
+ int line, const char *source)
+{
+ const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
+ "FD %s:%d socket() = %d\n" :
+ (sizeof(curl_socket_t) == sizeof(long)) ?
+ "FD %s:%d socket() = %ld\n" :
+ "FD %s:%d socket() = %zd\n";
+
+ curl_socket_t sockfd = socket(domain, type, protocol);
+
+ if(source && (sockfd != CURL_SOCKET_BAD))
+ curl_memlog(fmt, source, line, sockfd);
+
+ return sockfd;
+}
+
+#ifdef HAVE_SOCKETPAIR
+int curl_socketpair(int domain, int type, int protocol,
+ curl_socket_t socket_vector[2],
+ int line, const char *source)
+{
+ const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
+ "FD %s:%d socketpair() = %d %d\n" :
+ (sizeof(curl_socket_t) == sizeof(long)) ?
+ "FD %s:%d socketpair() = %ld %ld\n" :
+ "FD %s:%d socketpair() = %zd %zd\n";
+
+ int res = socketpair(domain, type, protocol, socket_vector);
+
+ if(source && (0 == res))
+ curl_memlog(fmt, source, line, socket_vector[0], socket_vector[1]);
+
+ return res;
+}
+#endif
+
+curl_socket_t curl_accept(curl_socket_t s, void *saddr, void *saddrlen,
+ int line, const char *source)
+{
+ const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
+ "FD %s:%d accept() = %d\n" :
+ (sizeof(curl_socket_t) == sizeof(long)) ?
+ "FD %s:%d accept() = %ld\n" :
+ "FD %s:%d accept() = %zd\n";
+
+ struct sockaddr *addr = (struct sockaddr *)saddr;
+ curl_socklen_t *addrlen = (curl_socklen_t *)saddrlen;
+
+ curl_socket_t sockfd = accept(s, addr, addrlen);
+
+ if(source && (sockfd != CURL_SOCKET_BAD))
+ curl_memlog(fmt, source, line, sockfd);
+
+ return sockfd;
+}
+
+/* separate function to allow libcurl to mark a "faked" close */
+void curl_mark_sclose(curl_socket_t sockfd, int line, const char *source)
+{
+ const char *fmt = (sizeof(curl_socket_t) == sizeof(int)) ?
+ "FD %s:%d sclose(%d)\n":
+ (sizeof(curl_socket_t) == sizeof(long)) ?
+ "FD %s:%d sclose(%ld)\n":
+ "FD %s:%d sclose(%zd)\n";
+
+ if(source)
+ curl_memlog(fmt, source, line, sockfd);
+}
+
+/* this is our own defined way to close sockets on *ALL* platforms */
+int curl_sclose(curl_socket_t sockfd, int line, const char *source)
+{
+ int res=sclose(sockfd);
+ curl_mark_sclose(sockfd, line, source);
+ return res;
+}
+
+FILE *curl_fopen(const char *file, const char *mode,
+ int line, const char *source)
+{
+ FILE *res=fopen(file, mode);
+
+ if(source)
+ curl_memlog("FILE %s:%d fopen(\"%s\",\"%s\") = %p\n",
+ source, line, file, mode, (void *)res);
+
+ return res;
+}
+
+#ifdef HAVE_FDOPEN
+FILE *curl_fdopen(int filedes, const char *mode,
+ int line, const char *source)
+{
+ FILE *res=fdopen(filedes, mode);
+
+ if(source)
+ curl_memlog("FILE %s:%d fdopen(\"%d\",\"%s\") = %p\n",
+ source, line, filedes, mode, (void *)res);
+
+ return res;
+}
+#endif
+
+int curl_fclose(FILE *file, int line, const char *source)
+{
+ int res;
+
+ assert(file != NULL);
+
+ res=fclose(file);
+
+ if(source)
+ curl_memlog("FILE %s:%d fclose(%p)\n",
+ source, line, (void *)file);
+
+ return res;
+}
+
+#define LOGLINE_BUFSIZE 1024
+
+/* this does the writting to the memory tracking log file */
+void curl_memlog(const char *format, ...)
+{
+ char *buf;
+ int nchars;
+ va_list ap;
+
+ if(!logfile)
+ return;
+
+ buf = (Curl_cmalloc)(LOGLINE_BUFSIZE);
+ if(!buf)
+ return;
+
+ va_start(ap, format);
+ nchars = vsnprintf(buf, LOGLINE_BUFSIZE, format, ap);
+ va_end(ap);
+
+ if(nchars > LOGLINE_BUFSIZE - 1)
+ nchars = LOGLINE_BUFSIZE - 1;
+
+ if(nchars > 0)
+ fwrite(buf, 1, nchars, logfile);
+
+ (Curl_cfree)(buf);
+}
+
+#endif /* CURLDEBUG */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-23 18:25:28 +0000