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https://github.com/dart-lang/sdk
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Implement File::Map on Windows.
R=zra@google.com Review URL: https://codereview.chromium.org/2430473002 .
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@ -74,9 +74,43 @@ bool File::IsClosed() {
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}
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void* File::Map(MapType type, int64_t position, int64_t length) {
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UNIMPLEMENTED();
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return NULL;
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void* File::Map(File::MapType type, int64_t position, int64_t length) {
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DWORD prot_alloc;
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DWORD prot_final;
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switch (type) {
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case File::kReadOnly:
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prot_alloc = PAGE_READWRITE;
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prot_final = PAGE_READONLY;
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break;
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case File::kReadExecute:
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prot_alloc = PAGE_EXECUTE_READWRITE;
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prot_final = PAGE_EXECUTE_READ;
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break;
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default:
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return NULL;
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}
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void* addr = VirtualAlloc(NULL, length, MEM_COMMIT | MEM_RESERVE, prot_alloc);
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if (addr == NULL) {
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Log::PrintErr("VirtualAlloc failed %d\n", GetLastError());
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return NULL;
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}
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SetPosition(position);
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if (!ReadFully(addr, length)) {
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Log::PrintErr("ReadFully failed %d\n", GetLastError());
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VirtualFree(addr, 0, MEM_RELEASE);
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return NULL;
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}
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DWORD old_prot;
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bool result = VirtualProtect(addr, length, prot_final, &old_prot);
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if (!result) {
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Log::PrintErr("VirtualProtect failed %d\n", GetLastError());
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VirtualFree(addr, 0, MEM_RELEASE);
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return NULL;
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}
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return addr;
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}
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@ -1241,7 +1241,8 @@ static bool ReadAppSnapshotBlobs(const char* script_name,
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file->Map(File::kReadOnly, vmisolate_position,
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instructions_position - vmisolate_position);
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if (read_only_buffer == NULL) {
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ErrorExit(kErrorExitCode, "Failed to memory map snapshot\n");
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Log::PrintErr("Failed to memory map snapshot\n");
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Platform::Exit(kErrorExitCode);
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}
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*vmisolate_buffer = reinterpret_cast<const uint8_t*>(read_only_buffer)
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@ -1261,7 +1262,8 @@ static bool ReadAppSnapshotBlobs(const char* script_name,
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*instructions_buffer = reinterpret_cast<const uint8_t*>(
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file->Map(File::kReadExecute, instructions_position, header[4]));
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if (*instructions_buffer == NULL) {
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ErrorExit(kErrorExitCode, "Failed to memory map snapshot2\n");
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Log::PrintErr("Failed to memory map snapshot\n");
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Platform::Exit(kErrorExitCode);
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}
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}
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@ -1283,29 +1285,33 @@ static bool ReadAppSnapshotDynamicLibrary(const char* script_name,
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*vmisolate_buffer = reinterpret_cast<const uint8_t*>(
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Extensions::ResolveSymbol(library, kPrecompiledVMIsolateSymbolName));
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if (*vmisolate_buffer == NULL) {
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ErrorExit(kErrorExitCode, "Failed to resolve symbol '%s'\n",
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kPrecompiledVMIsolateSymbolName);
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Log::PrintErr("Failed to resolve symbol '%s'\n",
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kPrecompiledVMIsolateSymbolName);
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Platform::Exit(kErrorExitCode);
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}
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*isolate_buffer = reinterpret_cast<const uint8_t*>(
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Extensions::ResolveSymbol(library, kPrecompiledIsolateSymbolName));
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if (*isolate_buffer == NULL) {
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ErrorExit(kErrorExitCode, "Failed to resolve symbol '%s'\n",
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kPrecompiledIsolateSymbolName);
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Log::PrintErr("Failed to resolve symbol '%s'\n",
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kPrecompiledIsolateSymbolName);
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Platform::Exit(kErrorExitCode);
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}
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*instructions_buffer = reinterpret_cast<const uint8_t*>(
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Extensions::ResolveSymbol(library, kPrecompiledInstructionsSymbolName));
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if (*instructions_buffer == NULL) {
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ErrorExit(kErrorExitCode, "Failed to resolve symbol '%s'\n",
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kPrecompiledInstructionsSymbolName);
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Log::PrintErr("Failed to resolve symbol '%s'\n",
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kPrecompiledInstructionsSymbolName);
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Platform::Exit(kErrorExitCode);
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}
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*rodata_buffer = reinterpret_cast<const uint8_t*>(
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Extensions::ResolveSymbol(library, kPrecompiledDataSymbolName));
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if (*rodata_buffer == NULL) {
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ErrorExit(kErrorExitCode, "Failed to resolve symbol '%s'\n",
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kPrecompiledDataSymbolName);
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Log::PrintErr("Failed to resolve symbol '%s'\n",
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kPrecompiledDataSymbolName);
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Platform::Exit(kErrorExitCode);
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}
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return true;
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