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comparison src/cpu/x86/vm/vm_version_x86.hpp @ 17739:98af1e198e73

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8037226: compiler/7196199/Test7196199.java fails on 32-bit linux with MaxVectorSize > 16 Summary: verify YMM registers after signal processing and set limit on vector's size. Reviewed-by: iveresov, twisti
author kvn
date Fri, 14 Mar 2014 17:28:58 -0700
parents 8a8ff6b577ed
children 606acabe7b5c
comparison
equal deleted inserted replaced
17737:0d2ce7411240 17739:98af1e198e73
226 static int _model; 226 static int _model;
227 static int _stepping; 227 static int _stepping;
228 static int _cpuFeatures; // features returned by the "cpuid" instruction 228 static int _cpuFeatures; // features returned by the "cpuid" instruction
229 // 0 if this instruction is not available 229 // 0 if this instruction is not available
230 static const char* _features_str; 230 static const char* _features_str;
231
232 static address _cpuinfo_segv_addr; // address of instruction which causes SEGV
233 static address _cpuinfo_cont_addr; // address of instruction after the one which causes SEGV
231 234
232 enum { 235 enum {
233 CPU_CX8 = (1 << 0), // next bits are from cpuid 1 (EDX) 236 CPU_CX8 = (1 << 0), // next bits are from cpuid 1 (EDX)
234 CPU_CMOV = (1 << 1), 237 CPU_CMOV = (1 << 1),
235 CPU_FXSR = (1 << 2), 238 CPU_FXSR = (1 << 2),
359 uint32_t ext_cpuid8_edx; // reserved 362 uint32_t ext_cpuid8_edx; // reserved
360 363
361 // extended control register XCR0 (the XFEATURE_ENABLED_MASK register) 364 // extended control register XCR0 (the XFEATURE_ENABLED_MASK register)
362 XemXcr0Eax xem_xcr0_eax; 365 XemXcr0Eax xem_xcr0_eax;
363 uint32_t xem_xcr0_edx; // reserved 366 uint32_t xem_xcr0_edx; // reserved
367
368 // Space to save ymm registers after signal handle
369 int ymm_save[8*4]; // Save ymm0, ymm7, ymm8, ymm15
364 }; 370 };
365 371
366 // The actual cpuid info block 372 // The actual cpuid info block
367 static CpuidInfo _cpuid_info; 373 static CpuidInfo _cpuid_info;
368 374
458 } 464 }
459 465
460 return result; 466 return result;
461 } 467 }
462 468
469 static bool os_supports_avx_vectors() {
470 if (!supports_avx()) {
471 return false;
472 }
473 // Verify that OS save/restore all bits of AVX registers
474 // during signal processing.
475 int nreg = 2 LP64_ONLY(+2);
476 for (int i = 0; i < 8 * nreg; i++) { // 32 bytes per ymm register
477 if (_cpuid_info.ymm_save[i] != ymm_test_value()) {
478 return false;
479 }
480 }
481 return true;
482 }
483
463 static void get_processor_features(); 484 static void get_processor_features();
464 485
465 public: 486 public:
466 // Offsets for cpuid asm stub 487 // Offsets for cpuid asm stub
467 static ByteSize std_cpuid0_offset() { return byte_offset_of(CpuidInfo, std_max_function); } 488 static ByteSize std_cpuid0_offset() { return byte_offset_of(CpuidInfo, std_max_function); }
474 static ByteSize ext_cpuid8_offset() { return byte_offset_of(CpuidInfo, ext_cpuid8_eax); } 495 static ByteSize ext_cpuid8_offset() { return byte_offset_of(CpuidInfo, ext_cpuid8_eax); }
475 static ByteSize tpl_cpuidB0_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB0_eax); } 496 static ByteSize tpl_cpuidB0_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB0_eax); }
476 static ByteSize tpl_cpuidB1_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB1_eax); } 497 static ByteSize tpl_cpuidB1_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB1_eax); }
477 static ByteSize tpl_cpuidB2_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB2_eax); } 498 static ByteSize tpl_cpuidB2_offset() { return byte_offset_of(CpuidInfo, tpl_cpuidB2_eax); }
478 static ByteSize xem_xcr0_offset() { return byte_offset_of(CpuidInfo, xem_xcr0_eax); } 499 static ByteSize xem_xcr0_offset() { return byte_offset_of(CpuidInfo, xem_xcr0_eax); }
500 static ByteSize ymm_save_offset() { return byte_offset_of(CpuidInfo, ymm_save); }
501
502 // The value used to check ymm register after signal handle
503 static int ymm_test_value() { return 0xCAFEBABE; }
504
505 static void set_cpuinfo_segv_addr(address pc) { _cpuinfo_segv_addr = pc; }
506 static bool is_cpuinfo_segv_addr(address pc) { return _cpuinfo_segv_addr == pc; }
507 static void set_cpuinfo_cont_addr(address pc) { _cpuinfo_cont_addr = pc; }
508 static address cpuinfo_cont_addr() { return _cpuinfo_cont_addr; }
509
510 static void clean_cpuFeatures() { _cpuFeatures = 0; }
511 static void set_avx_cpuFeatures() { _cpuFeatures = (CPU_SSE | CPU_SSE2 | CPU_AVX); }
512
479 513
480 // Initialization 514 // Initialization
481 static void initialize(); 515 static void initialize();
482 516
483 // Asserts 517 // Asserts