/*
* 从给定目录中搜索与指定版本最匹配的jre安装路径
*/
static char *ProcessDir(manifest_info *info, char *dirname)
{
DIR *dirp;
struct dirent *dp;
char *best = NULL;
int offset;
int best_offset = 0;
char *ret_str = NULL;
char buffer[PATH_MAX];
printf("%s[%d] [tid: %lu]: 开始从目录[%]中搜索安装的最佳jre版本...\n", __FILE__, __LINE__, pthread_self(), dirname);
if ((dirp = opendir(dirname)) == NULL)
return (NULL);
do {
if ((dp = readdir(dirp)) != NULL) {
offset = 0;
if ((JLI_StrNCmp(dp->d_name, "jre", 3) == 0) ||
(JLI_StrNCmp(dp->d_name, "jdk", 3) == 0))
offset = 3;
else if (JLI_StrNCmp(dp->d_name, "j2re", 4) == 0)
offset = 4;
else if (JLI_StrNCmp(dp->d_name, "j2sdk", 5) == 0)
offset = 5;
if (offset > 0) {
if ((JLI_AcceptableRelease(dp->d_name + offset,
info->jre_version)) && CheckSanity(dirname, dp->d_name)){
if ((best == NULL) || (JLI_ExactVersionId(
dp->d_name + offset, best + best_offset) > 0)) {
if (best != NULL)
JLI_MemFree(best);
best = JLI_StringDup(dp->d_name);
best_offset = offset;
}
}
}
}
} while (dp != NULL);
(void) closedir(dirp);
if (best == NULL){
printf("%s[%d] [tid: %lu]: 目录[%]中没有找到合适的jre版本...\n", __FILE__, __LINE__, pthread_self(), dirname);
return (NULL);
}
else {
ret_str = JLI_MemAlloc(JLI_StrLen(dirname) + JLI_StrLen(best) + 2);
sprintf(ret_str, "%s/%s", dirname, best);
JLI_MemFree(best);
printf("%s[%d] [tid: %lu]: 搜索到最合适的jre版本: %s...\n", __FILE__, __LINE__, pthread_self(), ret_str);
return (ret_str);
}
}
/*
* Allocated memory will be surrounded by 8 guard-bytes that will be
* checked at deallocation. (a leading and trailing unsigned int)
*/
inline void * allocate(unsigned int size, const char *file, int line, const char *type)
{
// before allocation new memory, check for corruption in existing markers
CheckSanity();
Uint32 extraNomansLand = 0;
size = size + extraNomansLand;
Uint32 neededSize = (size + 3) & 0xffffffc; // actual allocated memory for data (assumption: 32 bit architecture)
neededSize += markerSize; // add area of markers
void * ptr = (void *) malloc(neededSize);
memset(ptr, 0xa6, neededSize); // no-mans land poison
unsigned int *markBegin = (unsigned int *) ptr;
*markBegin = 0xa1a2a3a4;
unsigned int *markEnd = (unsigned int *) ADDPTR(ptr, neededSize-postfix);
*markEnd = 0xf1f2f3f4;
// increse ptr behound the magic marker
ptr = ADDPTR(ptr, prefix);
memset(ptr, 0xa5, size); // un-initialized poison
traceMap[ptr] = new TraceItem(size, neededSize, file, line, type);
DBERR("MEMORY allocation at 0x%08X (%s) of %u bytes from %s:%u\n", ptr, type, size, file, line);
return ptr;
}