snapshot/minidump/minidump_context_converter.cc - crashpad/crashpad - Git at Google

 // Copyright 2019 The Crashpad Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include "snapshot/minidump/minidump_context_converter.h"

 #include <string.h>

 #include <iterator>

 #include "base/logging.h"
 #include "minidump/minidump_context.h"

 namespace crashpad {
 namespace internal {

 MinidumpContextConverter::MinidumpContextConverter() : initialized_() {
   context_.architecture = CPUArchitecture::kCPUArchitectureUnknown;
 }

 bool MinidumpContextConverter::Initialize(
     CPUArchitecture arch,
     const std::vector<unsigned char>& minidump_context) {
   INITIALIZATION_STATE_SET_INITIALIZING(initialized_);

   if (minidump_context.size() == 0) {
     // Thread has no context.
     context_.architecture = CPUArchitecture::kCPUArchitectureUnknown;
     INITIALIZATION_STATE_SET_VALID(initialized_);
     return true;
   }

   context_.architecture = arch;

   if (context_.architecture == CPUArchitecture::kCPUArchitectureX86) {
     context_memory_.resize(sizeof(CPUContextX86));
     context_.x86 = reinterpret_cast<CPUContextX86*>(context_memory_.data());
     const MinidumpContextX86* src =
         reinterpret_cast<const MinidumpContextX86*>(minidump_context.data());
     if (minidump_context.size() < sizeof(MinidumpContextX86)) {
       return false;
     }

     if (!(src->context_flags & kMinidumpContextX86)) {
       return false;
     }

     if (src->context_flags & kMinidumpContextX86Extended) {
       context_.x86->fxsave = src->fxsave;
     } else if (src->context_flags & kMinidumpContextX86FloatingPoint) {
       CPUContextX86::FsaveToFxsave(src->fsave, &context_.x86->fxsave);
     }

     context_.x86->eax = src->eax;
     context_.x86->ebx = src->ebx;
     context_.x86->ecx = src->ecx;
     context_.x86->edx = src->edx;
     context_.x86->edi = src->edi;
     context_.x86->esi = src->esi;
     context_.x86->ebp = src->ebp;
     context_.x86->esp = src->esp;
     context_.x86->eip = src->eip;
     context_.x86->eflags = src->eflags;
     context_.x86->cs = static_cast<uint16_t>(src->cs);
     context_.x86->ds = static_cast<uint16_t>(src->ds);
     context_.x86->es = static_cast<uint16_t>(src->es);
     context_.x86->fs = static_cast<uint16_t>(src->fs);
     context_.x86->gs = static_cast<uint16_t>(src->gs);
     context_.x86->ss = static_cast<uint16_t>(src->ss);
     context_.x86->dr0 = src->dr0;
     context_.x86->dr1 = src->dr1;
     context_.x86->dr2 = src->dr2;
     context_.x86->dr3 = src->dr3;
     context_.x86->dr6 = src->dr6;
     context_.x86->dr7 = src->dr7;

     // Minidump passes no value for dr4/5. Our output context has space for
     // them. According to spec they're obsolete, but when present read as
     // aliases for dr6/7, so we'll do this.
     context_.x86->dr4 = src->dr6;
     context_.x86->dr5 = src->dr7;
   } else if (context_.architecture == CPUArchitecture::kCPUArchitectureX86_64) {
     context_memory_.resize(sizeof(CPUContextX86_64));
     context_.x86_64 =
         reinterpret_cast<CPUContextX86_64*>(context_memory_.data());
     const MinidumpContextAMD64* src =
         reinterpret_cast<const MinidumpContextAMD64*>(minidump_context.data());
     if (minidump_context.size() < sizeof(MinidumpContextAMD64)) {
       return false;
     }

     if (!(src->context_flags & kMinidumpContextAMD64)) {
       return false;
     }

     context_.x86_64->fxsave = src->fxsave;
     context_.x86_64->cs = src->cs;
     context_.x86_64->fs = src->fs;
     context_.x86_64->gs = src->gs;
     context_.x86_64->rflags = src->eflags;
     context_.x86_64->dr0 = src->dr0;
     context_.x86_64->dr1 = src->dr1;
     context_.x86_64->dr2 = src->dr2;
     context_.x86_64->dr3 = src->dr3;
     context_.x86_64->dr6 = src->dr6;
     context_.x86_64->dr7 = src->dr7;
     context_.x86_64->rax = src->rax;
     context_.x86_64->rcx = src->rcx;
     context_.x86_64->rdx = src->rdx;
     context_.x86_64->rbx = src->rbx;
     context_.x86_64->rsp = src->rsp;
     context_.x86_64->rbp = src->rbp;
     context_.x86_64->rsi = src->rsi;
     context_.x86_64->rdi = src->rdi;
     context_.x86_64->r8 = src->r8;
     context_.x86_64->r9 = src->r9;
     context_.x86_64->r10 = src->r10;
     context_.x86_64->r11 = src->r11;
     context_.x86_64->r12 = src->r12;
     context_.x86_64->r13 = src->r13;
     context_.x86_64->r14 = src->r14;
     context_.x86_64->r15 = src->r15;
     context_.x86_64->rip = src->rip;

     // See comments on x86 above.
     context_.x86_64->dr4 = src->dr6;
     context_.x86_64->dr5 = src->dr7;
   } else if (context_.architecture == CPUArchitecture::kCPUArchitectureARM) {
     context_memory_.resize(sizeof(CPUContextARM));
     context_.arm = reinterpret_cast<CPUContextARM*>(context_memory_.data());
     const MinidumpContextARM* src =
         reinterpret_cast<const MinidumpContextARM*>(minidump_context.data());
     if (minidump_context.size() < sizeof(MinidumpContextARM)) {
       return false;
     }

     if (!(src->context_flags & kMinidumpContextARM)) {
       return false;
     }

     for (size_t i = 0; i < std::size(src->regs); i++) {
       context_.arm->regs[i] = src->regs[i];
     }

     context_.arm->fp = src->fp;
     context_.arm->ip = src->ip;
     context_.arm->sp = src->sp;
     context_.arm->lr = src->lr;
     context_.arm->pc = src->pc;
     context_.arm->cpsr = src->cpsr;
     context_.arm->vfp_regs.fpscr = src->fpscr;

     for (size_t i = 0; i < std::size(src->vfp); i++) {
       context_.arm->vfp_regs.vfp[i] = src->vfp[i];
     }

     context_.arm->have_fpa_regs = false;
     context_.arm->have_vfp_regs =
         !!(src->context_flags & kMinidumpContextARMVFP);
   } else if (context_.architecture == CPUArchitecture::kCPUArchitectureARM64) {
     context_memory_.resize(sizeof(CPUContextARM64));
     context_.arm64 = reinterpret_cast<CPUContextARM64*>(context_memory_.data());
     const MinidumpContextARM64* src =
         reinterpret_cast<const MinidumpContextARM64*>(minidump_context.data());
     if (minidump_context.size() < sizeof(MinidumpContextARM64)) {
       return false;
     }

     if (!(src->context_flags & kMinidumpContextARM64)) {
       return false;
     }

     for (size_t i = 0; i < std::size(src->regs); i++) {
       context_.arm64->regs[i] = src->regs[i];
     }

     context_.arm64->regs[29] = src->fp;
     context_.arm64->regs[30] = src->lr;

     for (size_t i = 0; i < std::size(src->fpsimd); i++) {
       context_.arm64->fpsimd[i] = src->fpsimd[i];
     }

     context_.arm64->sp = src->sp;
     context_.arm64->pc = src->pc;
     context_.arm64->fpcr = src->fpcr;
     context_.arm64->fpsr = src->fpsr;
     context_.arm64->spsr = src->cpsr;
   } else if (context_.architecture == CPUArchitecture::kCPUArchitectureMIPSEL) {
     context_memory_.resize(sizeof(CPUContextMIPS));
     context_.mipsel = reinterpret_cast<CPUContextMIPS*>(context_memory_.data());
     const MinidumpContextMIPS* src =
         reinterpret_cast<const MinidumpContextMIPS*>(minidump_context.data());
     if (minidump_context.size() < sizeof(MinidumpContextMIPS)) {
       return false;
     }

     if (!(src->context_flags & kMinidumpContextMIPS)) {
       return false;
     }

     for (size_t i = 0; i < std::size(src->regs); i++) {
       context_.mipsel->regs[i] = src->regs[i];
     }

     context_.mipsel->mdhi = static_cast<uint32_t>(src->mdhi);
     context_.mipsel->mdlo = static_cast<uint32_t>(src->mdlo);
     context_.mipsel->dsp_control = src->dsp_control;

     for (size_t i = 0; i < std::size(src->hi); i++) {
       context_.mipsel->hi[i] = src->hi[i];
       context_.mipsel->lo[i] = src->lo[i];
     }

     context_.mipsel->cp0_epc = static_cast<uint32_t>(src->epc);
     context_.mipsel->cp0_badvaddr = static_cast<uint32_t>(src->badvaddr);
     context_.mipsel->cp0_status = src->status;
     context_.mipsel->cp0_cause = src->cause;
     context_.mipsel->fpcsr = src->fpcsr;
     context_.mipsel->fir = src->fir;

     memcpy(&context_.mipsel->fpregs, &src->fpregs, sizeof(src->fpregs));
   } else if (context_.architecture ==
              CPUArchitecture::kCPUArchitectureMIPS64EL) {
     context_memory_.resize(sizeof(CPUContextMIPS64));
     context_.mips64 =
         reinterpret_cast<CPUContextMIPS64*>(context_memory_.data());
     const MinidumpContextMIPS64* src =
         reinterpret_cast<const MinidumpContextMIPS64*>(minidump_context.data());
     if (minidump_context.size() < sizeof(MinidumpContextMIPS64)) {
       return false;
     }

     if (!(src->context_flags & kMinidumpContextMIPS64)) {
       return false;
     }

     for (size_t i = 0; i < std::size(src->regs); i++) {
       context_.mips64->regs[i] = src->regs[i];
     }

     context_.mips64->mdhi = src->mdhi;
     context_.mips64->mdlo = src->mdlo;
     context_.mips64->dsp_control = src->dsp_control;

     for (size_t i = 0; i < std::size(src->hi); i++) {
       context_.mips64->hi[i] = src->hi[i];
       context_.mips64->lo[i] = src->lo[i];
     }

     context_.mips64->cp0_epc = src->epc;
     context_.mips64->cp0_badvaddr = src->badvaddr;
     context_.mips64->cp0_status = src->status;
     context_.mips64->cp0_cause = src->cause;
     context_.mips64->fpcsr = src->fpcsr;
     context_.mips64->fir = src->fir;

     memcpy(&context_.mips64->fpregs, &src->fpregs, sizeof(src->fpregs));
   } else if (context_.architecture ==
              CPUArchitecture::kCPUArchitectureRISCV64) {
     context_memory_.resize(sizeof(CPUContextRISCV64));
     context_.riscv64 =
         reinterpret_cast<CPUContextRISCV64*>(context_memory_.data());
     const MinidumpContextRISCV64* src =
         reinterpret_cast<const MinidumpContextRISCV64*>(
             minidump_context.data());
     if (minidump_context.size() < sizeof(MinidumpContextRISCV64)) {
       return false;
     }

     if (!(src->context_flags & kMinidumpContextRISCV64)) {
       return false;
     }

     context_.riscv64->pc = src->pc;

     static_assert(sizeof(context_.riscv64->regs) == sizeof(src->regs),
                   "GPR size mismatch");
     memcpy(&context_.riscv64->regs, &src->regs, sizeof(src->regs));

     static_assert(sizeof(context_.riscv64->fpregs) == sizeof(src->fpregs),
                   "FPR size mismatch");
     memcpy(&context_.riscv64->fpregs, &src->fpregs, sizeof(src->fpregs));

     context_.riscv64->fcsr = src->fcsr;
   } else {
     // Architecture is listed as "unknown".
     DLOG(ERROR) << "Unknown architecture";
   }

   INITIALIZATION_STATE_SET_VALID(initialized_);
   return true;
 }

 }  // namespace internal
 }  // namespace crashpad
	// Copyright 2019 The Crashpad Authors
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include "snapshot/minidump/minidump_context_converter.h"

	#include <string.h>

	#include <iterator>

	#include "base/logging.h"
	#include "minidump/minidump_context.h"

	namespace crashpad {
	namespace internal {

	MinidumpContextConverter::MinidumpContextConverter() : initialized_() {
	context_.architecture = CPUArchitecture::kCPUArchitectureUnknown;
	}

	bool MinidumpContextConverter::Initialize(
	CPUArchitecture arch,
	const std::vector<unsigned char>& minidump_context) {
	INITIALIZATION_STATE_SET_INITIALIZING(initialized_);

	if (minidump_context.size() == 0) {
	// Thread has no context.
	context_.architecture = CPUArchitecture::kCPUArchitectureUnknown;
	INITIALIZATION_STATE_SET_VALID(initialized_);
	return true;
	}

	context_.architecture = arch;

	if (context_.architecture == CPUArchitecture::kCPUArchitectureX86) {
	context_memory_.resize(sizeof(CPUContextX86));
	context_.x86 = reinterpret_cast<CPUContextX86*>(context_memory_.data());
	const MinidumpContextX86* src =
	reinterpret_cast<const MinidumpContextX86*>(minidump_context.data());
	if (minidump_context.size() < sizeof(MinidumpContextX86)) {
	return false;
	}

	if (!(src->context_flags & kMinidumpContextX86)) {
	return false;
	}

	if (src->context_flags & kMinidumpContextX86Extended) {
	context_.x86->fxsave = src->fxsave;
	} else if (src->context_flags & kMinidumpContextX86FloatingPoint) {
	CPUContextX86::FsaveToFxsave(src->fsave, &context_.x86->fxsave);
	}

	context_.x86->eax = src->eax;
	context_.x86->ebx = src->ebx;
	context_.x86->ecx = src->ecx;
	context_.x86->edx = src->edx;
	context_.x86->edi = src->edi;
	context_.x86->esi = src->esi;
	context_.x86->ebp = src->ebp;
	context_.x86->esp = src->esp;
	context_.x86->eip = src->eip;
	context_.x86->eflags = src->eflags;
	context_.x86->cs = static_cast<uint16_t>(src->cs);
	context_.x86->ds = static_cast<uint16_t>(src->ds);
	context_.x86->es = static_cast<uint16_t>(src->es);
	context_.x86->fs = static_cast<uint16_t>(src->fs);
	context_.x86->gs = static_cast<uint16_t>(src->gs);
	context_.x86->ss = static_cast<uint16_t>(src->ss);
	context_.x86->dr0 = src->dr0;
	context_.x86->dr1 = src->dr1;
	context_.x86->dr2 = src->dr2;
	context_.x86->dr3 = src->dr3;
	context_.x86->dr6 = src->dr6;
	context_.x86->dr7 = src->dr7;

	// Minidump passes no value for dr4/5. Our output context has space for
	// them. According to spec they're obsolete, but when present read as
	// aliases for dr6/7, so we'll do this.
	context_.x86->dr4 = src->dr6;
	context_.x86->dr5 = src->dr7;
	} else if (context_.architecture == CPUArchitecture::kCPUArchitectureX86_64) {
	context_memory_.resize(sizeof(CPUContextX86_64));
	context_.x86_64 =
	reinterpret_cast<CPUContextX86_64*>(context_memory_.data());
	const MinidumpContextAMD64* src =
	reinterpret_cast<const MinidumpContextAMD64*>(minidump_context.data());
	if (minidump_context.size() < sizeof(MinidumpContextAMD64)) {
	return false;
	}

	if (!(src->context_flags & kMinidumpContextAMD64)) {
	return false;
	}

	context_.x86_64->fxsave = src->fxsave;
	context_.x86_64->cs = src->cs;
	context_.x86_64->fs = src->fs;
	context_.x86_64->gs = src->gs;
	context_.x86_64->rflags = src->eflags;
	context_.x86_64->dr0 = src->dr0;
	context_.x86_64->dr1 = src->dr1;
	context_.x86_64->dr2 = src->dr2;
	context_.x86_64->dr3 = src->dr3;
	context_.x86_64->dr6 = src->dr6;
	context_.x86_64->dr7 = src->dr7;
	context_.x86_64->rax = src->rax;
	context_.x86_64->rcx = src->rcx;
	context_.x86_64->rdx = src->rdx;
	context_.x86_64->rbx = src->rbx;
	context_.x86_64->rsp = src->rsp;
	context_.x86_64->rbp = src->rbp;
	context_.x86_64->rsi = src->rsi;
	context_.x86_64->rdi = src->rdi;
	context_.x86_64->r8 = src->r8;
	context_.x86_64->r9 = src->r9;
	context_.x86_64->r10 = src->r10;
	context_.x86_64->r11 = src->r11;
	context_.x86_64->r12 = src->r12;
	context_.x86_64->r13 = src->r13;
	context_.x86_64->r14 = src->r14;
	context_.x86_64->r15 = src->r15;
	context_.x86_64->rip = src->rip;

	// See comments on x86 above.
	context_.x86_64->dr4 = src->dr6;
	context_.x86_64->dr5 = src->dr7;
	} else if (context_.architecture == CPUArchitecture::kCPUArchitectureARM) {
	context_memory_.resize(sizeof(CPUContextARM));
	context_.arm = reinterpret_cast<CPUContextARM*>(context_memory_.data());
	const MinidumpContextARM* src =
	reinterpret_cast<const MinidumpContextARM*>(minidump_context.data());
	if (minidump_context.size() < sizeof(MinidumpContextARM)) {
	return false;
	}

	if (!(src->context_flags & kMinidumpContextARM)) {
	return false;
	}

	for (size_t i = 0; i < std::size(src->regs); i++) {
	context_.arm->regs[i] = src->regs[i];
	}

	context_.arm->fp = src->fp;
	context_.arm->ip = src->ip;
	context_.arm->sp = src->sp;
	context_.arm->lr = src->lr;
	context_.arm->pc = src->pc;
	context_.arm->cpsr = src->cpsr;
	context_.arm->vfp_regs.fpscr = src->fpscr;

	for (size_t i = 0; i < std::size(src->vfp); i++) {
	context_.arm->vfp_regs.vfp[i] = src->vfp[i];
	}

	context_.arm->have_fpa_regs = false;
	context_.arm->have_vfp_regs =
	!!(src->context_flags & kMinidumpContextARMVFP);
	} else if (context_.architecture == CPUArchitecture::kCPUArchitectureARM64) {
	context_memory_.resize(sizeof(CPUContextARM64));
	context_.arm64 = reinterpret_cast<CPUContextARM64*>(context_memory_.data());
	const MinidumpContextARM64* src =
	reinterpret_cast<const MinidumpContextARM64*>(minidump_context.data());
	if (minidump_context.size() < sizeof(MinidumpContextARM64)) {
	return false;
	}

	if (!(src->context_flags & kMinidumpContextARM64)) {
	return false;
	}

	for (size_t i = 0; i < std::size(src->regs); i++) {
	context_.arm64->regs[i] = src->regs[i];
	}

	context_.arm64->regs[29] = src->fp;
	context_.arm64->regs[30] = src->lr;

	for (size_t i = 0; i < std::size(src->fpsimd); i++) {
	context_.arm64->fpsimd[i] = src->fpsimd[i];
	}

	context_.arm64->sp = src->sp;
	context_.arm64->pc = src->pc;
	context_.arm64->fpcr = src->fpcr;
	context_.arm64->fpsr = src->fpsr;
	context_.arm64->spsr = src->cpsr;
	} else if (context_.architecture == CPUArchitecture::kCPUArchitectureMIPSEL) {
	context_memory_.resize(sizeof(CPUContextMIPS));
	context_.mipsel = reinterpret_cast<CPUContextMIPS*>(context_memory_.data());
	const MinidumpContextMIPS* src =
	reinterpret_cast<const MinidumpContextMIPS*>(minidump_context.data());
	if (minidump_context.size() < sizeof(MinidumpContextMIPS)) {
	return false;
	}

	if (!(src->context_flags & kMinidumpContextMIPS)) {
	return false;
	}

	for (size_t i = 0; i < std::size(src->regs); i++) {
	context_.mipsel->regs[i] = src->regs[i];
	}

	context_.mipsel->mdhi = static_cast<uint32_t>(src->mdhi);
	context_.mipsel->mdlo = static_cast<uint32_t>(src->mdlo);
	context_.mipsel->dsp_control = src->dsp_control;

	for (size_t i = 0; i < std::size(src->hi); i++) {
	context_.mipsel->hi[i] = src->hi[i];
	context_.mipsel->lo[i] = src->lo[i];
	}

	context_.mipsel->cp0_epc = static_cast<uint32_t>(src->epc);
	context_.mipsel->cp0_badvaddr = static_cast<uint32_t>(src->badvaddr);
	context_.mipsel->cp0_status = src->status;
	context_.mipsel->cp0_cause = src->cause;
	context_.mipsel->fpcsr = src->fpcsr;
	context_.mipsel->fir = src->fir;

	memcpy(&context_.mipsel->fpregs, &src->fpregs, sizeof(src->fpregs));
	} else if (context_.architecture ==
	CPUArchitecture::kCPUArchitectureMIPS64EL) {
	context_memory_.resize(sizeof(CPUContextMIPS64));
	context_.mips64 =
	reinterpret_cast<CPUContextMIPS64*>(context_memory_.data());
	const MinidumpContextMIPS64* src =
	reinterpret_cast<const MinidumpContextMIPS64*>(minidump_context.data());
	if (minidump_context.size() < sizeof(MinidumpContextMIPS64)) {
	return false;
	}

	if (!(src->context_flags & kMinidumpContextMIPS64)) {
	return false;
	}

	for (size_t i = 0; i < std::size(src->regs); i++) {
	context_.mips64->regs[i] = src->regs[i];
	}

	context_.mips64->mdhi = src->mdhi;
	context_.mips64->mdlo = src->mdlo;
	context_.mips64->dsp_control = src->dsp_control;

	for (size_t i = 0; i < std::size(src->hi); i++) {
	context_.mips64->hi[i] = src->hi[i];
	context_.mips64->lo[i] = src->lo[i];
	}

	context_.mips64->cp0_epc = src->epc;
	context_.mips64->cp0_badvaddr = src->badvaddr;
	context_.mips64->cp0_status = src->status;
	context_.mips64->cp0_cause = src->cause;
	context_.mips64->fpcsr = src->fpcsr;
	context_.mips64->fir = src->fir;

	memcpy(&context_.mips64->fpregs, &src->fpregs, sizeof(src->fpregs));
	} else if (context_.architecture ==
	CPUArchitecture::kCPUArchitectureRISCV64) {
	context_memory_.resize(sizeof(CPUContextRISCV64));
	context_.riscv64 =
	reinterpret_cast<CPUContextRISCV64*>(context_memory_.data());
	const MinidumpContextRISCV64* src =
	reinterpret_cast<const MinidumpContextRISCV64*>(
	minidump_context.data());
	if (minidump_context.size() < sizeof(MinidumpContextRISCV64)) {
	return false;
	}

	if (!(src->context_flags & kMinidumpContextRISCV64)) {
	return false;
	}

	context_.riscv64->pc = src->pc;

	static_assert(sizeof(context_.riscv64->regs) == sizeof(src->regs),
	"GPR size mismatch");
	memcpy(&context_.riscv64->regs, &src->regs, sizeof(src->regs));

	static_assert(sizeof(context_.riscv64->fpregs) == sizeof(src->fpregs),
	"FPR size mismatch");
	memcpy(&context_.riscv64->fpregs, &src->fpregs, sizeof(src->fpregs));

	context_.riscv64->fcsr = src->fcsr;
	} else {
	// Architecture is listed as "unknown".
	DLOG(ERROR) << "Unknown architecture";
	}

	INITIALIZATION_STATE_SET_VALID(initialized_);
	return true;
	}

	} // namespace internal
	} // namespace crashpad