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crashpad/minidump/test/minidump_context_test_util.cc
Mark Mentovai d98a4de718 win: support native x86 CONTEXT structures with x87 but no SSE context 
When no SSE (fxsave) context is available but x87 (fsave) context is, use the
x87 context.

This also embeds the x87 FPU opcode from the fxsave fop field in bits 16-26 of
the fsave error_selector field, true to the layout of the fsave structure. See
Intel SDM volume 1 (253665-061) 8.1.10 and figure 8-9.

BUG=crashpad:161
TEST=crashpad_snapshot_test CPUContextX86.*:CPUContextWin.*

Change-Id: I0bf7ed995c152f124166eaa20104d228d3468f76
Reviewed-on: https://chromium-review.googlesource.com/442144
Reviewed-by: Scott Graham <scottmg@chromium.org>
2017-02-15 17:39:50 +00:00

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// Copyright 2014 The Crashpad Authors. All rights reserved.
//
// 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 "minidump/test/minidump_context_test_util.h"
#include <string.h>
#include <sys/types.h>
#include "base/format_macros.h"
#include "base/macros.h"
#include "base/strings/stringprintf.h"
#include "gtest/gtest.h"
#include "snapshot/cpu_context.h"
#include "snapshot/test/test_cpu_context.h"
namespace crashpad {
namespace test {
void InitializeMinidumpContextX86(MinidumpContextX86* context, uint32_t seed) {
if (seed == 0) {
memset(context, 0, sizeof(*context));
context->context_flags = kMinidumpContextX86;
return;
}
context->context_flags = kMinidumpContextX86All;
uint32_t value = seed;
context->eax = value++;
context->ebx = value++;
context->ecx = value++;
context->edx = value++;
context->edi = value++;
context->esi = value++;
context->ebp = value++;
context->esp = value++;
context->eip = value++;
context->eflags = value++;
context->cs = value++ & 0xffff;
context->ds = value++ & 0xffff;
context->es = value++ & 0xffff;
context->fs = value++ & 0xffff;
context->gs = value++ & 0xffff;
context->ss = value++ & 0xffff;
InitializeCPUContextX86Fxsave(&context->fxsave, &value);
context->dr0 = value++;
context->dr1 = value++;
context->dr2 = value++;
context->dr3 = value++;
value += 2; // Minidumps don’t carry dr4 or dr5.
context->dr6 = value++;
context->dr7 = value++;
// Copy the values that are aliased between the fxsave area
// (context->extended_registers) and the floating-point save area
// (context->float_save).
context->float_save.control_word = context->fxsave.fcw;
context->float_save.status_word = context->fxsave.fsw;
context->float_save.tag_word = CPUContextX86::FxsaveToFsaveTagWord(
context->fxsave.fsw, context->fxsave.ftw, context->fxsave.st_mm);
context->float_save.error_offset = context->fxsave.fpu_ip;
context->float_save.error_selector =
(context->fxsave.fop << 16) | context->fxsave.fpu_cs;
context->float_save.data_offset = context->fxsave.fpu_dp;
context->float_save.data_selector = context->fxsave.fpu_ds;
for (size_t st_mm_index = 0;
st_mm_index < arraysize(context->fxsave.st_mm);
++st_mm_index) {
for (size_t byte = 0;
byte < arraysize(context->fxsave.st_mm[st_mm_index].st);
++byte) {
size_t st_index =
st_mm_index * arraysize(context->fxsave.st_mm[st_mm_index].st) + byte;
context->float_save.register_area[st_index] =
context->fxsave.st_mm[st_mm_index].st[byte];
}
}
// Set this field last, because it has no analogue in CPUContextX86.
context->float_save.spare_0 = value++;
}
void InitializeMinidumpContextAMD64(MinidumpContextAMD64* context,
uint32_t seed) {
if (seed == 0) {
memset(context, 0, sizeof(*context));
context->context_flags = kMinidumpContextAMD64;
return;
}
context->context_flags = kMinidumpContextAMD64All;
uint32_t value = seed;
context->rax = value++;
context->rbx = value++;
context->rcx = value++;
context->rdx = value++;
context->rdi = value++;
context->rsi = value++;
context->rbp = value++;
context->rsp = value++;
context->r8 = value++;
context->r9 = value++;
context->r10 = value++;
context->r11 = value++;
context->r12 = value++;
context->r13 = value++;
context->r14 = value++;
context->r15 = value++;
context->rip = value++;
context->eflags = value++;
context->cs = static_cast<uint16_t>(value++);
context->fs = static_cast<uint16_t>(value++);
context->gs = static_cast<uint16_t>(value++);
InitializeCPUContextX86_64Fxsave(&context->fxsave, &value);
// mxcsr appears twice, and the two values should be aliased.
context->mx_csr = context->fxsave.mxcsr;
context->dr0 = value++;
context->dr1 = value++;
context->dr2 = value++;
context->dr3 = value++;
value += 2; // Minidumps don’t carry dr4 or dr5.
context->dr6 = value++;
context->dr7 = value++;
// Set these fields last, because they have no analogues in CPUContextX86_64.
context->p1_home = value++;
context->p2_home = value++;
context->p3_home = value++;
context->p4_home = value++;
context->p5_home = value++;
context->p6_home = value++;
context->ds = static_cast<uint16_t>(value++);
context->es = static_cast<uint16_t>(value++);
context->ss = static_cast<uint16_t>(value++);
for (size_t index = 0; index < arraysize(context->vector_register); ++index) {
context->vector_register[index].lo = value++;
context->vector_register[index].hi = value++;
}
context->vector_control = value++;
context->debug_control = value++;
context->last_branch_to_rip = value++;
context->last_branch_from_rip = value++;
context->last_exception_to_rip = value++;
context->last_exception_from_rip = value++;
}
namespace {
// Using gtest assertions, compares |expected| to |observed|. This is
// templatized because the CPUContextX86::Fxsave and CPUContextX86_64::Fxsave
// are nearly identical but have different sizes for the members |xmm|,
// |reserved_4|, and |available|.
template <typename FxsaveType>
void ExpectMinidumpContextFxsave(const FxsaveType* expected,
const FxsaveType* observed) {
EXPECT_EQ(expected->fcw, observed->fcw);
EXPECT_EQ(expected->fsw, observed->fsw);
EXPECT_EQ(expected->ftw, observed->ftw);
EXPECT_EQ(expected->reserved_1, observed->reserved_1);
EXPECT_EQ(expected->fop, observed->fop);
EXPECT_EQ(expected->fpu_ip, observed->fpu_ip);
EXPECT_EQ(expected->fpu_cs, observed->fpu_cs);
EXPECT_EQ(expected->reserved_2, observed->reserved_2);
EXPECT_EQ(expected->fpu_dp, observed->fpu_dp);
EXPECT_EQ(expected->fpu_ds, observed->fpu_ds);
EXPECT_EQ(expected->reserved_3, observed->reserved_3);
EXPECT_EQ(expected->mxcsr, observed->mxcsr);
EXPECT_EQ(expected->mxcsr_mask, observed->mxcsr_mask);
for (size_t st_mm_index = 0;
st_mm_index < arraysize(expected->st_mm);
++st_mm_index) {
SCOPED_TRACE(base::StringPrintf("st_mm_index %" PRIuS, st_mm_index));
for (size_t byte = 0;
byte < arraysize(expected->st_mm[st_mm_index].st);
++byte) {
EXPECT_EQ(expected->st_mm[st_mm_index].st[byte],
observed->st_mm[st_mm_index].st[byte]) << "byte " << byte;
}
for (size_t byte = 0;
byte < arraysize(expected->st_mm[st_mm_index].st_reserved);
++byte) {
EXPECT_EQ(expected->st_mm[st_mm_index].st_reserved[byte],
observed->st_mm[st_mm_index].st_reserved[byte])
<< "byte " << byte;
}
}
for (size_t xmm_index = 0;
xmm_index < arraysize(expected->xmm);
++xmm_index) {
SCOPED_TRACE(base::StringPrintf("xmm_index %" PRIuS, xmm_index));
for (size_t byte = 0; byte < arraysize(expected->xmm[xmm_index]); ++byte) {
EXPECT_EQ(expected->xmm[xmm_index][byte], observed->xmm[xmm_index][byte])
<< "byte " << byte;
}
}
for (size_t byte = 0; byte < arraysize(expected->reserved_4); ++byte) {
EXPECT_EQ(expected->reserved_4[byte], observed->reserved_4[byte])
<< "byte " << byte;
}
for (size_t byte = 0; byte < arraysize(expected->available); ++byte) {
EXPECT_EQ(expected->available[byte], observed->available[byte])
<< "byte " << byte;
}
}
} // namespace
void ExpectMinidumpContextX86(
uint32_t expect_seed, const MinidumpContextX86* observed, bool snapshot) {
MinidumpContextX86 expected;
InitializeMinidumpContextX86(&expected, expect_seed);
EXPECT_EQ(expected.context_flags, observed->context_flags);
EXPECT_EQ(expected.dr0, observed->dr0);
EXPECT_EQ(expected.dr1, observed->dr1);
EXPECT_EQ(expected.dr2, observed->dr2);
EXPECT_EQ(expected.dr3, observed->dr3);
EXPECT_EQ(expected.dr6, observed->dr6);
EXPECT_EQ(expected.dr7, observed->dr7);
EXPECT_EQ(expected.float_save.control_word,
observed->float_save.control_word);
EXPECT_EQ(expected.float_save.status_word, observed->float_save.status_word);
EXPECT_EQ(expected.float_save.tag_word, observed->float_save.tag_word);
EXPECT_EQ(expected.float_save.error_offset,
observed->float_save.error_offset);
EXPECT_EQ(expected.float_save.error_selector,
observed->float_save.error_selector);
EXPECT_EQ(expected.float_save.data_offset, observed->float_save.data_offset);
EXPECT_EQ(expected.float_save.data_selector,
observed->float_save.data_selector);
for (size_t index = 0;
index < arraysize(expected.float_save.register_area);
++index) {
EXPECT_EQ(expected.float_save.register_area[index],
observed->float_save.register_area[index]) << "index " << index;
}
if (snapshot) {
EXPECT_EQ(0u, observed->float_save.spare_0);
} else {
EXPECT_EQ(expected.float_save.spare_0, observed->float_save.spare_0);
}
EXPECT_EQ(expected.gs, observed->gs);
EXPECT_EQ(expected.fs, observed->fs);
EXPECT_EQ(expected.es, observed->es);
EXPECT_EQ(expected.ds, observed->ds);
EXPECT_EQ(expected.edi, observed->edi);
EXPECT_EQ(expected.esi, observed->esi);
EXPECT_EQ(expected.ebx, observed->ebx);
EXPECT_EQ(expected.edx, observed->edx);
EXPECT_EQ(expected.ecx, observed->ecx);
EXPECT_EQ(expected.eax, observed->eax);
EXPECT_EQ(expected.ebp, observed->ebp);
EXPECT_EQ(expected.eip, observed->eip);
EXPECT_EQ(expected.cs, observed->cs);
EXPECT_EQ(expected.eflags, observed->eflags);
EXPECT_EQ(expected.esp, observed->esp);
EXPECT_EQ(expected.ss, observed->ss);
ExpectMinidumpContextFxsave(&expected.fxsave, &observed->fxsave);
}
void ExpectMinidumpContextAMD64(
uint32_t expect_seed, const MinidumpContextAMD64* observed, bool snapshot) {
MinidumpContextAMD64 expected;
InitializeMinidumpContextAMD64(&expected, expect_seed);
EXPECT_EQ(expected.context_flags, observed->context_flags);
if (snapshot) {
EXPECT_EQ(0u, observed->p1_home);
EXPECT_EQ(0u, observed->p2_home);
EXPECT_EQ(0u, observed->p3_home);
EXPECT_EQ(0u, observed->p4_home);
EXPECT_EQ(0u, observed->p5_home);
EXPECT_EQ(0u, observed->p6_home);
} else {
EXPECT_EQ(expected.p1_home, observed->p1_home);
EXPECT_EQ(expected.p2_home, observed->p2_home);
EXPECT_EQ(expected.p3_home, observed->p3_home);
EXPECT_EQ(expected.p4_home, observed->p4_home);
EXPECT_EQ(expected.p5_home, observed->p5_home);
EXPECT_EQ(expected.p6_home, observed->p6_home);
}
EXPECT_EQ(expected.mx_csr, observed->mx_csr);
EXPECT_EQ(expected.cs, observed->cs);
if (snapshot) {
EXPECT_EQ(0u, observed->ds);
EXPECT_EQ(0u, observed->es);
} else {
EXPECT_EQ(expected.ds, observed->ds);
EXPECT_EQ(expected.es, observed->es);
}
EXPECT_EQ(expected.fs, observed->fs);
EXPECT_EQ(expected.gs, observed->gs);
if (snapshot) {
EXPECT_EQ(0u, observed->ss);
} else {
EXPECT_EQ(expected.ss, observed->ss);
}
EXPECT_EQ(expected.eflags, observed->eflags);
EXPECT_EQ(expected.dr0, observed->dr0);
EXPECT_EQ(expected.dr1, observed->dr1);
EXPECT_EQ(expected.dr2, observed->dr2);
EXPECT_EQ(expected.dr3, observed->dr3);
EXPECT_EQ(expected.dr6, observed->dr6);
EXPECT_EQ(expected.dr7, observed->dr7);
EXPECT_EQ(expected.rax, observed->rax);
EXPECT_EQ(expected.rcx, observed->rcx);
EXPECT_EQ(expected.rdx, observed->rdx);
EXPECT_EQ(expected.rbx, observed->rbx);
EXPECT_EQ(expected.rsp, observed->rsp);
EXPECT_EQ(expected.rbp, observed->rbp);
EXPECT_EQ(expected.rsi, observed->rsi);
EXPECT_EQ(expected.rdi, observed->rdi);
EXPECT_EQ(expected.r8, observed->r8);
EXPECT_EQ(expected.r9, observed->r9);
EXPECT_EQ(expected.r10, observed->r10);
EXPECT_EQ(expected.r11, observed->r11);
EXPECT_EQ(expected.r12, observed->r12);
EXPECT_EQ(expected.r13, observed->r13);
EXPECT_EQ(expected.r14, observed->r14);
EXPECT_EQ(expected.r15, observed->r15);
EXPECT_EQ(expected.rip, observed->rip);
ExpectMinidumpContextFxsave(&expected.fxsave, &observed->fxsave);
for (size_t index = 0; index < arraysize(expected.vector_register); ++index) {
if (snapshot) {
EXPECT_EQ(0u, observed->vector_register[index].lo) << "index " << index;
EXPECT_EQ(0u, observed->vector_register[index].hi) << "index " << index;
} else {
EXPECT_EQ(expected.vector_register[index].lo,
observed->vector_register[index].lo) << "index " << index;
EXPECT_EQ(expected.vector_register[index].hi,
observed->vector_register[index].hi) << "index " << index;
}
}
if (snapshot) {
EXPECT_EQ(0u, observed->vector_control);
EXPECT_EQ(0u, observed->debug_control);
EXPECT_EQ(0u, observed->last_branch_to_rip);
EXPECT_EQ(0u, observed->last_branch_from_rip);
EXPECT_EQ(0u, observed->last_exception_to_rip);
EXPECT_EQ(0u, observed->last_exception_from_rip);
} else {
EXPECT_EQ(expected.vector_control, observed->vector_control);
EXPECT_EQ(expected.debug_control, observed->debug_control);
EXPECT_EQ(expected.last_branch_to_rip, observed->last_branch_to_rip);
EXPECT_EQ(expected.last_branch_from_rip, observed->last_branch_from_rip);
EXPECT_EQ(expected.last_exception_to_rip, observed->last_exception_to_rip);
EXPECT_EQ(expected.last_exception_from_rip,
observed->last_exception_from_rip);
}
}
} // namespace test
} // namespace crashpad
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