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-rw-r--r--src/Unwind/UnwindCursor.hpp106
1 files changed, 57 insertions, 49 deletions
diff --git a/src/Unwind/UnwindCursor.hpp b/src/Unwind/UnwindCursor.hpp
index 0350dfd..b4d413f 100644
--- a/src/Unwind/UnwindCursor.hpp
+++ b/src/Unwind/UnwindCursor.hpp
@@ -19,17 +19,20 @@
#include <pthread.h>
#include <unwind.h>
-#if __APPLE__
+#ifdef __APPLE__
#include <mach-o/dyld.h>
#endif
-#include "libunwind.h"
+#include "config.h"
#include "AddressSpace.hpp"
-#include "Registers.hpp"
-#include "DwarfInstructions.hpp"
#include "CompactUnwinder.hpp"
#include "config.h"
+#include "DwarfInstructions.hpp"
+#include "EHHeaderParser.hpp"
+#include "libunwind.h"
+#include "Registers.hpp"
+#include "Unwind-EHABI.h"
namespace libunwind {
@@ -58,7 +61,7 @@ private:
// These fields are all static to avoid needing an initializer.
// There is only one instance of this class per process.
static pthread_rwlock_t _lock;
-#if __APPLE__
+#ifdef __APPLE__
static void dyldUnloadHook(const struct mach_header *mh, intptr_t slide);
static bool _registeredForDyldUnloads;
#endif
@@ -87,7 +90,7 @@ typename DwarfFDECache<A>::entry DwarfFDECache<A>::_initialBuffer[64];
template <typename A>
pthread_rwlock_t DwarfFDECache<A>::_lock = PTHREAD_RWLOCK_INITIALIZER;
-#if __APPLE__
+#ifdef __APPLE__
template <typename A>
bool DwarfFDECache<A>::_registeredForDyldUnloads = false;
#endif
@@ -129,7 +132,7 @@ void DwarfFDECache<A>::add(pint_t mh, pint_t ip_start, pint_t ip_end,
_bufferUsed->ip_end = ip_end;
_bufferUsed->fde = fde;
++_bufferUsed;
-#if __APPLE__
+#ifdef __APPLE__
if (!_registeredForDyldUnloads) {
_dyld_register_func_for_remove_image(&dyldUnloadHook);
_registeredForDyldUnloads = true;
@@ -153,7 +156,7 @@ void DwarfFDECache<A>::removeAllIn(pint_t mh) {
_LIBUNWIND_LOG_NON_ZERO(::pthread_rwlock_unlock(&_lock));
}
-#if __APPLE__
+#ifdef __APPLE__
template <typename A>
void DwarfFDECache<A>::dyldUnloadHook(const struct mach_header *mh, intptr_t ) {
removeAllIn((pint_t) mh);
@@ -364,29 +367,49 @@ private:
};
#endif // _LIBUNWIND_SUPPORT_COMPACT_UNWIND
-
class _LIBUNWIND_HIDDEN AbstractUnwindCursor {
public:
- virtual ~AbstractUnwindCursor() {}
- virtual bool validReg(int) = 0;
- virtual unw_word_t getReg(int) = 0;
- virtual void setReg(int, unw_word_t) = 0;
- virtual bool validFloatReg(int) = 0;
- virtual unw_fpreg_t getFloatReg(int) = 0;
- virtual void setFloatReg(int, unw_fpreg_t) = 0;
- virtual int step() = 0;
- virtual void getInfo(unw_proc_info_t *) = 0;
- virtual void jumpto() = 0;
- virtual bool isSignalFrame() = 0;
- virtual bool getFunctionName(char *bf, size_t ln, unw_word_t *off) = 0;
- virtual void setInfoBasedOnIPRegister(bool isReturnAddr = false) = 0;
- virtual const char *getRegisterName(int num) = 0;
-#if __arm__
- virtual void saveVFPAsX() = 0;
+ // NOTE: provide a class specific placement deallocation function (S5.3.4 p20)
+ // This avoids an unnecessary dependency to libc++abi.
+ void operator delete(void *, size_t) {}
+
+ virtual ~AbstractUnwindCursor() {}
+ virtual bool validReg(int) { _LIBUNWIND_ABORT("validReg not implemented"); }
+ virtual unw_word_t getReg(int) { _LIBUNWIND_ABORT("getReg not implemented"); }
+ virtual void setReg(int, unw_word_t) {
+ _LIBUNWIND_ABORT("setReg not implemented");
+ }
+ virtual bool validFloatReg(int) {
+ _LIBUNWIND_ABORT("validFloatReg not implemented");
+ }
+ virtual unw_fpreg_t getFloatReg(int) {
+ _LIBUNWIND_ABORT("getFloatReg not implemented");
+ }
+ virtual void setFloatReg(int, unw_fpreg_t) {
+ _LIBUNWIND_ABORT("setFloatReg not implemented");
+ }
+ virtual int step() { _LIBUNWIND_ABORT("step not implemented"); }
+ virtual void getInfo(unw_proc_info_t *) {
+ _LIBUNWIND_ABORT("getInfo not implemented");
+ }
+ virtual void jumpto() { _LIBUNWIND_ABORT("jumpto not implemented"); }
+ virtual bool isSignalFrame() {
+ _LIBUNWIND_ABORT("isSignalFrame not implemented");
+ }
+ virtual bool getFunctionName(char *, size_t, unw_word_t *) {
+ _LIBUNWIND_ABORT("getFunctionName not implemented");
+ }
+ virtual void setInfoBasedOnIPRegister(bool = false) {
+ _LIBUNWIND_ABORT("setInfoBasedOnIPRegister not implemented");
+ }
+ virtual const char *getRegisterName(int) {
+ _LIBUNWIND_ABORT("getRegisterName not implemented");
+ }
+#ifdef __arm__
+ virtual void saveVFPAsX() { _LIBUNWIND_ABORT("saveVFPAsX not implemented"); }
#endif
};
-
/// UnwindCursor contains all state (including all register values) during
/// an unwind. This is normally stack allocated inside a unw_cursor_t.
template <typename A, typename R>
@@ -409,12 +432,10 @@ public:
virtual bool getFunctionName(char *buf, size_t len, unw_word_t *off);
virtual void setInfoBasedOnIPRegister(bool isReturnAddress = false);
virtual const char *getRegisterName(int num);
-#if __arm__
+#ifdef __arm__
virtual void saveVFPAsX();
#endif
- void operator delete(void *, size_t) {}
-
private:
#if LIBCXXABI_ARM_EHABI
@@ -584,7 +605,7 @@ template <typename A, typename R> void UnwindCursor<A, R>::jumpto() {
_registers.jumpto();
}
-#if __arm__
+#ifdef __arm__
template <typename A, typename R> void UnwindCursor<A, R>::saveVFPAsX() {
_registers.saveVFPAsX();
}
@@ -605,20 +626,6 @@ struct EHABIIndexEntry {
uint32_t data;
};
-// Unable to unwind in the ARM index table (section 5 EHABI).
-#define UNW_EXIDX_CANTUNWIND 0x1
-
-static inline uint32_t signExtendPrel31(uint32_t data) {
- return data | ((data & 0x40000000u) << 1);
-}
-
-extern "C" _Unwind_Reason_Code __aeabi_unwind_cpp_pr0(
- _Unwind_State state, _Unwind_Control_Block *ucbp, _Unwind_Context *context);
-extern "C" _Unwind_Reason_Code __aeabi_unwind_cpp_pr1(
- _Unwind_State state, _Unwind_Control_Block *ucbp, _Unwind_Context *context);
-extern "C" _Unwind_Reason_Code __aeabi_unwind_cpp_pr2(
- _Unwind_State state, _Unwind_Control_Block *ucbp, _Unwind_Context *context);
-
template<typename A>
struct EHABISectionIterator {
typedef EHABISectionIterator _Self;
@@ -730,8 +737,8 @@ bool UnwindCursor<A, R>::getInfoFromEHABISection(
// in compact form (section 6.3 EHABI).
if (exceptionTableData & 0x80000000) {
// Grab the index of the personality routine from the compact form.
- int choice = (exceptionTableData & 0x0f000000) >> 24;
- int extraWords = 0;
+ uint32_t choice = (exceptionTableData & 0x0f000000) >> 24;
+ uint32_t extraWords = 0;
switch (choice) {
case 0:
personalityRoutine = (unw_word_t) &__aeabi_unwind_cpp_pr0;
@@ -823,8 +830,9 @@ bool UnwindCursor<A, R>::getInfoFromDwarfSection(pint_t pc,
}
#if _LIBUNWIND_SUPPORT_DWARF_INDEX
if (!foundFDE && (sects.dwarf_index_section != 0)) {
- // Have eh_frame_hdr section which is index into dwarf section.
- // TO DO: implement index search
+ foundFDE = EHHeaderParser<A>::findFDE(
+ _addressSpace, pc, sects.dwarf_index_section,
+ (uint32_t)sects.dwarf_index_section_length, &fdeInfo, &cieInfo);
}
#endif
if (!foundFDE) {
@@ -1304,6 +1312,6 @@ bool UnwindCursor<A, R>::getFunctionName(char *buf, size_t bufLen,
buf, bufLen, offset);
}
-}; // namespace libunwind
+} // namespace libunwind
#endif // __UNWINDCURSOR_HPP__
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-07 14:22:33 +0000