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comparison src/os/windows/vm/os_windows.cpp @ 7696:fbbc2ea60c4d

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fixed signal handler for long underflow on windows
author Christian Haeubl <haeubl@ssw.jku.at>
date Mon, 04 Feb 2013 17:29:13 +0100
parents 3ac7d10a6572
children 5fc51c1ecdeb
comparison
equal deleted inserted replaced
7695:320d6fd3dbf3 7696:fbbc2ea60c4d
2101 // handle exception caused by idiv; should only happen for -MinInt/-1 2101 // handle exception caused by idiv; should only happen for -MinInt/-1
2102 // (division by zero is handled explicitly) 2102 // (division by zero is handled explicitly)
2103 #ifdef _M_IA64 2103 #ifdef _M_IA64
2104 assert(0, "Fix Handle_IDiv_Exception"); 2104 assert(0, "Fix Handle_IDiv_Exception");
2105 #elif _M_AMD64 2105 #elif _M_AMD64
2106 PCONTEXT ctx = exceptionInfo->ContextRecord; 2106 #ifdef GRAAL
2107 address pc = (address)ctx->Rip; 2107 PCONTEXT ctx = exceptionInfo->ContextRecord;
2108 #ifndef GRAAL 2108 address pc = (address)ctx->Rip;
2109 assert(pc[0] == 0xF7, "not an idiv opcode"); 2109 assert(pc[0] == 0x48 && pc[1] == 0xF7 || pc[0] == 0xF7, "not an idiv opcode");
2110 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); 2110 if (pc[0] == 0x48) {
2111 assert(ctx->Rax == min_jint, "unexpected idiv exception"); 2111 // set correct result values and continue after idiv instruction
2112 #endif 2112 ctx->Rip = (DWORD64)pc + 3; // REX idiv reg, reg is 3 bytes
2113 // set correct result values and continue after idiv instruction 2113 ctx->Rax = (DWORD64)min_jlong; // result
2114 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes 2114 } else {
2115 ctx->Rax = (DWORD)min_jint; // result 2115 ctx->Rip = (DWORD64)pc + 2; // idiv reg, reg is 2 bytes
2116 ctx->Rdx = (DWORD)0; // remainder 2116 ctx->Rax = (DWORD64)min_jint; // result
2117 // Continue the execution 2117 }
2118 ctx->Rdx = (DWORD64)0; // remainder
2119 // Continue the execution
2120 #else
2121 PCONTEXT ctx = exceptionInfo->ContextRecord;
2122 address pc = (address)ctx->Rip;
2123 assert(pc[0] == 0xF7, "not an idiv opcode");
2124 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");
2125 assert(ctx->Rax == min_jint, "unexpected idiv exception");
2126 // set correct result values and continue after idiv instruction
2127 ctx->Rip = (DWORD)pc + 2; // idiv reg, reg is 2 bytes
2128 ctx->Rax = (DWORD)min_jint; // result
2129 ctx->Rdx = (DWORD)0; // remainder
2130 // Continue the execution
2131 #endif // GRAAL
2118 #else 2132 #else
2119 PCONTEXT ctx = exceptionInfo->ContextRecord; 2133 PCONTEXT ctx = exceptionInfo->ContextRecord;
2120 address pc = (address)ctx->Eip; 2134 address pc = (address)ctx->Eip;
2121 assert(pc[0] == 0xF7, "not an idiv opcode"); 2135 assert(pc[0] == 0xF7, "not an idiv opcode");
2122 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands"); 2136 assert((pc[1] & ~0x7) == 0xF8, "cannot handle non-register operands");