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Update ArmCPUDetect to fix potential crashes. Merge from Dolphin.
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Sacha
parent
e69130b591
commit
cb04c073b9
@ -29,155 +29,121 @@ const char procfile[] = "/proc/cpuinfo";
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// https://www.kernel.org/doc/Documentation/ABI/testing/sysfs-devices-system-cpu
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const char syscpupresentfile[] = "/sys/devices/system/cpu/present";
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char *GetCPUString()
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std::string GetCPUString()
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{
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const char marker[] = "Hardware\t: ";
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char *cpu_string = 0;
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// Count the number of processor lines in /proc/cpuinfo
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char buf[1024];
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FILE *fp;
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fp = fopen(procfile, "r");
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if (!fp)
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return 0;
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std::string line, marker = "Hardware\t: ";
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std::string cpu_string = "Unknown";
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std::fstream file;
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return cpu_string;
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while (fgets(buf, sizeof(buf), fp))
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while (std::getline(file, line))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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cpu_string = buf + sizeof(marker) - 1;
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cpu_string = strndup(cpu_string, strlen(cpu_string) - 1); // Strip the newline
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// INFO_LOG(BOOT, "CPU: %s", cpu_string);
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break;
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if (line.find(marker) != std::string::npos)
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{
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cpu_string = line.substr(marker.length());
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cpu_string.pop_back(); // Drop the new-line character
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}
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}
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fclose(fp);
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return cpu_string;
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}
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unsigned char GetCPUImplementer()
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{
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const char marker[] = "CPU implementer\t: ";
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char *implementer_string = 0;
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std::string line, marker = "CPU implementer\t: ";
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unsigned char implementer = 0;
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char buf[1024];
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std::fstream file;
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File::IOFile file(procfile, "r");
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auto const fp = file.GetHandle();
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if (!fp)
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 0;
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while (fgets(buf, sizeof(buf), fp))
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while (std::getline(file, line))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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implementer_string = buf + sizeof(marker) - 1;
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implementer_string = strndup(implementer_string, strlen(implementer_string) - 1); // Strip the newline
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sscanf(implementer_string, "0x%02hhx", &implementer);
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break;
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if (line.find(marker) != std::string::npos)
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{
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line = line.substr(marker.length());
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sscanf(line.c_str(), "0x%02hhx", &implementer);
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break;
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}
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}
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free(implementer_string);
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return implementer;
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}
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unsigned short GetCPUPart()
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{
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const char marker[] = "CPU part\t: ";
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char *part_string = 0;
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std::string line, marker = "CPU part\t: ";
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unsigned short part = 0;
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char buf[1024];
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std::fstream file;
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File::IOFile file(procfile, "r");
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auto const fp = file.GetHandle();
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if (!fp)
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 0;
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while (fgets(buf, sizeof(buf), fp))
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while (std::getline(file, line))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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part_string = buf + sizeof(marker) - 1;
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part_string = strndup(part_string, strlen(part_string) - 1); // Strip the newline
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sscanf(part_string, "0x%03hx", &part);
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break;
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if (line.find(marker) != std::string::npos)
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{
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line = line.substr(marker.length());
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sscanf(line.c_str(), "0x%03gx", &part);
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break;
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}
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}
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free(part_string);
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return part;
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}
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bool CheckCPUFeature(const char *feature)
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bool CheckCPUFeature(const std::string& feature)
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{
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const char marker[] = "Features\t: ";
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char buf[1024];
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FILE *fp;
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std::string line, marker = "Features\t: ";
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std::fstream file;
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fp = fopen(procfile, "r");
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if (!fp)
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 0;
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while (fgets(buf, sizeof(buf), fp))
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while (std::getline(file, line))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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char *featurestring = buf + sizeof(marker) - 1;
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char *token = strtok(featurestring, " ");
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while (token != NULL)
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if (line.find(marker) != std::string::npos)
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{
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if (strstr(token, feature))
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std::stringstream line_stream(line);
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std::string token;
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while (std::getline(line_stream, token, ' ')
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{
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fclose(fp);
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return true;
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if (token == feature)
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return true;
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}
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token = strtok(NULL, " ");
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}
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}
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fclose(fp);
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return false;
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}
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int GetCoreCount()
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{
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const char marker[] = "processor\t: ";
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int cores = 0;
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char buf[1024];
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FILE *fp;
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std::string line, marker = "processor\t: ";
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int cores = 1;
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std::fstream file;
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fp = fopen(syscpupresentfile, "r");
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if (fp)
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if (File::OpenCPPFile(file, syscpupresentfile, std::ios::in))
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{
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fgets(buf, sizeof(buf), fp);
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fclose(fp);
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int low, high;
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// Technically, this could be "1-2,4,8-23" but for ARM devices that seems unlikely.
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int found = sscanf(buf, "%d-%d", &low, &high);
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// Only a single number, so just one slot/core (actually threads.)
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int low, high, found;
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std::getline(file, line);
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found = sscanf(line, "%d-%d", &low, &high);
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if (found == 1)
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return 1;
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if (found == 2)
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return high - low + 1;
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// Okay, let's fall back.
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}
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fp = fopen(procfile, "r");
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if (!fp)
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return 0;
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if (!File::OpenCPPFile(file, procfile, std::ios::in))
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return 1;
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while (fgets(buf, sizeof(buf), fp))
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while (std::getline(file, line))
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{
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if (strncmp(buf, marker, sizeof(marker) - 1))
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continue;
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++cores;
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if (line.find(marker) != std::string::npos)
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++cores;
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}
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fclose(fp);
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return cores;
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}
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#endif
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@ -192,11 +158,16 @@ CPUInfo::CPUInfo() {
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void CPUInfo::Detect()
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{
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// Set some defaults here
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// When ARMv8 cpus come out, these need to be updated.
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HTT = false;
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#ifdef _M_ARM_64
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OS64bit = true;
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CPU64bit = true;
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Mode64bit = true;
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#else
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OS64bit = false;
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CPU64bit = false;
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Mode64bit = false;
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Mode64bit = false;
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#endif
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vendor = VENDOR_ARM;
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// Get the information about the CPU
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@ -245,7 +216,7 @@ void CPUInfo::Detect()
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bFP = false;
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bASIMD = false;
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#else // __linux__
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strncpy(cpu_string, GetCPUString(), sizeof(cpu_string));
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strncpy(cpu_string, GetCPUString().c_str(), sizeof(cpu_string));
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bSwp = CheckCPUFeature("swp");
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bHalf = CheckCPUFeature("half");
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bThumb = CheckCPUFeature("thumb");
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@ -291,6 +262,7 @@ std::string CPUInfo::Summarize()
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if (bNEON) sum += ", NEON";
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if (bIDIVa) sum += ", IDIVa";
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if (bIDIVt) sum += ", IDIVt";
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if (CPU64bit) sum += ", 64-bit";
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return sum;
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}
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2
native
2
native
@ -1 +1 @@
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Subproject commit efd2cb0f618cc750842a9176487fee27599191cd
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Subproject commit 7ab6385a5e7a0fe18a59363739f1b10b13b6224a
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