ErrorCode Process::getMemoryRegionInfo(Address const &address,
MemoryRegionInfo &info) {
if (!address.valid())
return kErrorInvalidArgument;
info.clear();
return kErrorNotFound;
}
ErrorCode Process::getMemoryRegionInfo(Address const &address,
MemoryRegionInfo &info) {
if (!address.valid())
return kErrorInvalidArgument;
info.clear();
FILE *fp = ProcFS::OpenFILE(_pid, "maps");
if (fp == nullptr) {
return Platform::TranslateError();
}
uint64_t last = 0;
bool found = false;
while (!found) {
// Each line can contain one path and some additional addresses and
// such, so PATH_MAX * 2 should be enough.
char buf[PATH_MAX * 2];
uint64_t start, end;
char r, w, x, p;
uint64_t offset;
unsigned int devMinor, devMajor;
uint64_t inode;
int nread;
if (std::fgets(buf, sizeof(buf), fp) == nullptr)
break;
if (std::sscanf(buf, "%" PRIx64 "-%" PRIx64 " %c%c%c%c %" PRIx64
" %x:%x %" PRIu64 " %n",
&start, &end, &r, &w, &x, &p, &offset, &devMinor, &devMajor,
&inode, &nread) != 10) {
continue;
}
if (address >= last && address <= start) {
//
// A hole.
//
info.start = last;
info.length = start - last;
found = true;
} else if (address >= start && address < end) {
//
// A defined region.
//
info.start = start;
info.length = end - start;
info.protection = 0;
if (r == 'r')
info.protection |= ds2::kProtectionRead;
if (w == 'w')
info.protection |= ds2::kProtectionWrite;
if (x == 'x')
info.protection |= ds2::kProtectionExecute;
while (buf[nread] != '\0' && std::isspace(buf[nread]))
++nread;
info.backingFile = buf + nread;
info.backingFileOffset = offset;
info.backingFileInode = inode;
found = true;
} else {
last = end;
}
}
std::fclose(fp);
if (!found) {
info.start = last;
//
// We need to obtain the end of the address space, first
// we need to know if it's 64-bit.
//
ErrorCode error = updateInfo();
if (error != kSuccess && error != kErrorAlreadyExist)
return error;
if (CPUTypeIs64Bit(_info.cpuType)) {
info.length = std::numeric_limits<uint64_t>::max() - info.start;
} else {
info.length = std::numeric_limits<uint32_t>::max() - info.start;
}
}
return kSuccess;
}
