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Merge pull request #8501 from liamwhite/backtrace-again

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core/arm: better support for backtrace generation
This commit is contained in:
Mai 2022-07-07 23:49:54 -04:00 • committed by GitHub
commit 313f047f97
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5 changed files with 51 additions and 15 deletions
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30
src/core/arm/dynarmic/arm_dynarmic_32.cpp
View file

@ -427,18 +427,38 @@ void ARM_Dynarmic_32::PageTableChanged(Common::PageTable& page_table,
}
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 {};
u64 fp, u64 lr, u64 pc) {
std::vector<BacktraceEntry> out;
auto& memory = system.Memory();
out.push_back({"", 0, pc, 0, ""});
// fp (= r11) points to the last frame record.
// Frame records are two words long:
// fp+0 : pointer to previous frame record
// fp+4 : value of lr for frame
while (true) {
out.push_back({"", 0, lr, 0, ""});
if (!fp || (fp % 4 != 0) || !memory.IsValidVirtualAddressRange(fp, 8)) {
break;
}
lr = memory.Read32(fp + 4);
fp = memory.Read32(fp);
}
SymbolicateBacktrace(system, out);
return out;
}
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]);
const auto& reg = ctx.cpu_registers;
return GetBacktrace(system, reg[11], reg[14], reg[15]);
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_32::GetBacktrace() const {
return GetBacktrace(system, GetReg(13), GetReg(14));
return GetBacktrace(system, GetReg(11), GetReg(14), GetReg(15));
}
} // namespace Core

2
src/core/arm/dynarmic/arm_dynarmic_32.h
View file

@ -78,7 +78,7 @@ protected:
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);
static std::vector<BacktraceEntry> GetBacktrace(Core::System& system, u64 fp, u64 lr, u64 pc);
using JitCacheKey = std::pair<Common::PageTable*, std::size_t>;
using JitCacheType =

17
src/core/arm/dynarmic/arm_dynarmic_64.cpp
View file

@ -494,22 +494,22 @@ void ARM_Dynarmic_64::PageTableChanged(Common::PageTable& page_table,
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_64::GetBacktrace(Core::System& system,
u64 fp, u64 lr) {
u64 fp, u64 lr, u64 pc) {
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
out.push_back({"", 0, pc, 0, ""});
// fp (= x29) points to the previous frame record.
// 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) {
if (!fp || (fp % 4 != 0) || !memory.IsValidVirtualAddressRange(fp, 16)) {
break;
}
lr = memory.Read64(fp + 8) - 4;
lr = memory.Read64(fp + 8);
fp = memory.Read64(fp);
}
@ -520,11 +520,12 @@ std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_64::GetBacktrace(Core::S
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]);
const auto& reg = ctx.cpu_registers;
return GetBacktrace(system, reg[29], reg[30], ctx.pc);
}
std::vector<ARM_Interface::BacktraceEntry> ARM_Dynarmic_64::GetBacktrace() const {
return GetBacktrace(system, GetReg(29), GetReg(30));
return GetBacktrace(system, GetReg(29), GetReg(30), GetPC());
}
} // namespace Core

2
src/core/arm/dynarmic/arm_dynarmic_64.h
View file

@ -73,7 +73,7 @@ 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);
static std::vector<BacktraceEntry> GetBacktrace(Core::System& system, u64 fp, u64 lr, u64 pc);
using JitCacheKey = std::pair<Common::PageTable*, std::size_t>;
using JitCacheType =