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Merge pull request #8232 from liamwhite/backtrace

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core/arm: separate backtrace collection
This commit is contained in:
Mai M 2022-04-21 02:51:03 -04:00 committed by GitHub
commit fd409a9247
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GPG Key ID: 4AEE18F83AFDEB23
6 changed files with 98 additions and 90 deletions
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97
src/core/arm/arm_interface.cpp
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@ -14,96 +14,28 @@
#include "core/loader/loader.h"
#include "core/memory.h"
#include "core/arm/dynarmic/arm_dynarmic_32.h"
#include "core/arm/dynarmic/arm_dynarmic_64.h"
namespace Core {
constexpr u64 SEGMENT_BASE = 0x7100000000ull;
std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktraceFromContext(
System& system, const ThreadContext64& ctx) {
std::vector<BacktraceEntry> out;
auto& memory = system.Memory();
auto fp = ctx.cpu_registers[29];
auto lr = ctx.cpu_registers[30];
while (true) {
out.push_back({
.module = "",
.address = 0,
.original_address = lr,
.offset = 0,
.name = {},
});
if (fp == 0) {
break;
}
lr = memory.Read64(fp + 8) - 4;
fp = memory.Read64(fp);
}
std::map<VAddr, std::string> modules;
auto& loader{system.GetAppLoader()};
if (loader.ReadNSOModules(modules) != Loader::ResultStatus::Success) {
return {};
}
std::map<std::string, Symbols::Symbols> symbols;
for (const auto& module : modules) {
symbols.insert_or_assign(module.second,
Symbols::GetSymbols(module.first, system.Memory(),
system.CurrentProcess()->Is64BitProcess()));
}
for (auto& entry : out) {
VAddr base = 0;
for (auto iter = modules.rbegin(); iter != modules.rend(); ++iter) {
const auto& module{*iter};
if (entry.original_address >= module.first) {
entry.module = module.second;
base = module.first;
break;
}
}
entry.offset = entry.original_address - base;
entry.address = SEGMENT_BASE + entry.offset;
if (entry.module.empty())
entry.module = "unknown";
const auto symbol_set = symbols.find(entry.module);
if (symbol_set != symbols.end()) {
const auto symbol = Symbols::GetSymbolName(symbol_set->second, entry.offset);
if (symbol.has_value()) {
// TODO(DarkLordZach): Add demangling of symbol names.
entry.name = *symbol;
}
}
}
return out;
Core::System& system, const ARM_Interface::ThreadContext32& ctx) {
return ARM_Dynarmic_32::GetBacktraceFromContext(system, ctx);
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktrace() const {
std::vector<BacktraceEntry> out;
auto& memory = system.Memory();
auto fp = GetReg(29);
auto lr = GetReg(30);
while (true) {
out.push_back({"", 0, lr, 0, ""});
if (!fp) {
break;
}
lr = memory.Read64(fp + 8) - 4;
fp = memory.Read64(fp);
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktraceFromContext(
Core::System& system, const ARM_Interface::ThreadContext64& ctx) {
return ARM_Dynarmic_64::GetBacktraceFromContext(system, ctx);
}
void ARM_Interface::SymbolicateBacktrace(Core::System& system, std::vector<BacktraceEntry>& out) {
std::map<VAddr, std::string> modules;
auto& loader{system.GetAppLoader()};
if (loader.ReadNSOModules(modules) != Loader::ResultStatus::Success) {
return {};
return;
}
std::map<std::string, Symbols::Symbols> symbols;
@ -127,8 +59,9 @@ std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktrace() const {
entry.offset = entry.original_address - base;
entry.address = SEGMENT_BASE + entry.offset;
if (entry.module.empty())
if (entry.module.empty()) {
entry.module = "unknown";
}
const auto symbol_set = symbols.find(entry.module);
if (symbol_set != symbols.end()) {
@ -139,12 +72,10 @@ std::vector<ARM_Interface::BacktraceEntry> ARM_Interface::GetBacktrace() const {
}
}
}
return out;
}
void ARM_Interface::LogBacktrace() const {
const VAddr sp = GetReg(13);
const VAddr sp = GetSP();
const VAddr pc = GetPC();
LOG_ERROR(Core_ARM, "Backtrace, sp={:016X}, pc={:016X}", sp, pc);
LOG_ERROR(Core_ARM, "{:20}{:20}{:20}{:20}{}", "Module Name", "Address", "Original Address",

18
src/core/arm/arm_interface.h
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@ -100,6 +100,12 @@ public:
*/
virtual u64 GetPC() const = 0;
/**
* Get the current Stack Pointer
* @return Returns current SP
*/
virtual u64 GetSP() const = 0;
/**
* Get an ARM register
* @param index Register index
@ -182,17 +188,13 @@ public:
std::string name;
};
static std::vector<BacktraceEntry> GetBacktraceFromContext(System& system,
const ThreadContext32& ctx);
static std::vector<BacktraceEntry> GetBacktraceFromContext(System& system,
const ThreadContext64& ctx);
std::vector<BacktraceEntry> GetBacktrace() const;
virtual std::vector<BacktraceEntry> GetBacktrace() const = 0;
/// fp (= r29) points to the last frame record.
/// Note that this is the frame record for the *previous* frame, not the current one.
/// Note we need to subtract 4 from our last read to get the proper address
/// Frame records are two words long:
/// fp+0 : pointer to previous frame record
/// fp+8 : value of lr for frame
void LogBacktrace() const;
protected:
@ -200,6 +202,8 @@ protected:
System& system;
CPUInterrupts& interrupt_handlers;
bool uses_wall_clock;
static void SymbolicateBacktrace(Core::System& system, std::vector<BacktraceEntry>& out);
};
} // namespace Core

19
src/core/arm/dynarmic/arm_dynarmic_32.cpp
View File

@ -268,6 +268,10 @@ u64 ARM_Dynarmic_32::GetPC() const {
return jit.load()->Regs()[15];
}
u64 ARM_Dynarmic_32::GetSP() const {
return jit.load()->Regs()[13];
}
u64 ARM_Dynarmic_32::GetReg(int index) const {
return jit.load()->Regs()[index];
}
@ -362,4 +366,19 @@ void ARM_Dynarmic_32::PageTableChanged(Common::PageTable& page_table,
jit_cache.emplace(key, std::move(new_jit));
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_32::GetBacktrace(Core::System& system,
u64 sp, u64 lr) {
// No way to get accurate stack traces in A32 yet
return {};
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_32::GetBacktraceFromContext(
System& system, const ThreadContext32& ctx) {
return GetBacktrace(system, ctx.cpu_registers[13], ctx.cpu_registers[14]);
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_32::GetBacktrace() const {
return GetBacktrace(system, GetReg(13), GetReg(14));
}
} // namespace Core

8
src/core/arm/dynarmic/arm_dynarmic_32.h
View File

@ -35,6 +35,7 @@ public:
void SetPC(u64 pc) override;
u64 GetPC() const override;
u64 GetSP() const override;
u64 GetReg(int index) const override;
void SetReg(int index, u64 value) override;
u128 GetVectorReg(int index) const override;
@ -66,9 +67,16 @@ public:
void PageTableChanged(Common::PageTable& new_page_table,
std::size_t new_address_space_size_in_bits) override;
static std::vector<BacktraceEntry> GetBacktraceFromContext(System& system,
const ThreadContext32& ctx);
std::vector<BacktraceEntry> GetBacktrace() const override;
private:
std::shared_ptr<Dynarmic::A32::Jit> MakeJit(Common::PageTable* page_table) const;
static std::vector<BacktraceEntry> GetBacktrace(Core::System& system, u64 sp, u64 lr);
using JitCacheKey = std::pair<Common::PageTable*, std::size_t>;
using JitCacheType =
std::unordered_map<JitCacheKey, std::shared_ptr<Dynarmic::A32::Jit>, Common::PairHash>;

38
src/core/arm/dynarmic/arm_dynarmic_64.cpp
View File

@ -328,6 +328,10 @@ u64 ARM_Dynarmic_64::GetPC() const {
return jit.load()->GetPC();
}
u64 ARM_Dynarmic_64::GetSP() const {
return jit.load()->GetSP();
}
u64 ARM_Dynarmic_64::GetReg(int index) const {
return jit.load()->GetRegister(index);
}
@ -430,4 +434,38 @@ void ARM_Dynarmic_64::PageTableChanged(Common::PageTable& page_table,
jit_cache.emplace(key, std::move(new_jit));
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_64::GetBacktrace(Core::System& system,
u64 fp, u64 lr) {
std::vector<BacktraceEntry> out;
auto& memory = system.Memory();
// fp (= r29) points to the last frame record.
// Note that this is the frame record for the *previous* frame, not the current one.
// Note we need to subtract 4 from our last read to get the proper address
// Frame records are two words long:
// fp+0 : pointer to previous frame record
// fp+8 : value of lr for frame
while (true) {
out.push_back({"", 0, lr, 0, ""});
if (!fp) {
break;
}
lr = memory.Read64(fp + 8) - 4;
fp = memory.Read64(fp);
}
SymbolicateBacktrace(system, out);
return out;
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_64::GetBacktraceFromContext(
System& system, const ThreadContext64& ctx) {
return GetBacktrace(system, ctx.cpu_registers[29], ctx.cpu_registers[30]);
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_64::GetBacktrace() const {
return GetBacktrace(system, GetReg(29), GetReg(30));
}
} // namespace Core

8
src/core/arm/dynarmic/arm_dynarmic_64.h
View File

@ -33,6 +33,7 @@ public:
void SetPC(u64 pc) override;
u64 GetPC() const override;
u64 GetSP() const override;
u64 GetReg(int index) const override;
void SetReg(int index, u64 value) override;
u128 GetVectorReg(int index) const override;
@ -60,10 +61,17 @@ public:
void PageTableChanged(Common::PageTable& new_page_table,
std::size_t new_address_space_size_in_bits) override;
static std::vector<BacktraceEntry> GetBacktraceFromContext(System& system,
const ThreadContext64& ctx);
std::vector<BacktraceEntry> GetBacktrace() const override;
private:
std::shared_ptr<Dynarmic::A64::Jit> MakeJit(Common::PageTable* page_table,
std::size_t address_space_bits) const;
static std::vector<BacktraceEntry> GetBacktrace(Core::System& system, u64 fp, u64 lr);
using JitCacheKey = std::pair<Common::PageTable*, std::size_t>;
using JitCacheType =
std::unordered_map<JitCacheKey, std::shared_ptr<Dynarmic::A64::Jit>, Common::PairHash>;