Differential D27362 Diff 75617 ksysguardd/Linux/cpuinfo.c

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ksysguardd/Linux/cpuinfo.c

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40static int HighNumCores = 0; /* Highest # of cores ever seen */ 40​static int HighNumCores = 0; /* Highest # of cores ever seen */
41static float* Clocks = 0; /* Array with one entry per core */ 41​static float* Clocks = 0; /* Array with one entry per core */
42 42​
43#define CPUINFOBUFSIZE (32 * 1024) 43​/* Enough for 4-6 virtual cores. Larger values will be tried as needed. */
44static char CpuInfoBuf[ CPUINFOBUFSIZE ]; 44​static size_t CpuInfoBufSize = 8 * 1024;
45​static char* CpuInfoBuf = NULL;
45static int Dirty = 0; 46​static int Dirty = 0;
46static struct SensorModul *CpuInfoSM; 47​static struct SensorModul *CpuInfoSM;
47 48​
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191 return -1; 192​ return -1;
192 } 193​ }
193 194​
195​ if ( CpuInfoBuf == NULL ) {
196​ CpuInfoBuf = malloc( CpuInfoBufSize );
197​ }
194 n = 0; 198​ n = 0;
195 for(;;) { 199​ for(;;) {
196 ssize_t len = read( fd, CpuInfoBuf + n, CPUINFOBUFSIZE - 1 - n ); 200​ ssize_t len = read( fd, CpuInfoBuf + n, CpuInfoBufSize - 1 - n );
197 if( len < 0 ) { 201​ if( len < 0 ) {
198 print_error( "Failed to read file \'/proc/cpuinfo\'!\n" ); 202​ print_error( "Failed to read file \'/proc/cpuinfo\'!\n" );
199 CpuInfoOK = -1; 203​ CpuInfoOK = -1;
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203 n += len; 207​ n += len;
204 if( len == 0 ) /* reading finished */ 208​ if( len == 0 ) /* reading finished */
205 break; 209​ break;
206 if( n == CPUINFOBUFSIZE - 1 ) { 210​ if( n == CpuInfoBufSize - 1 ) {
207 log_error( "Internal buffer too small to read \'/proc/cpuinfo\'" ); 211​ /* The buffer was too small. Double its size and keep going. */
208 CpuInfoOK = 0; 212​ size_t new_size = CpuInfoBufSize * 2;
209 close( fd ); 213​ char* new_buffer = malloc( new_size );
210 return -1; 214​ memcpy( new_buffer, CpuInfoBuf, n ); /* copy read data */
215​ free( CpuInfoBuf ); /* free old buffer */
216​ CpuInfoBuf = new_buffer; /* remember new buffer and size */
217​ CpuInfoBufSize = new_size;
211 } 218​ }
212 } 219​ }
213220​
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