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-rw-r--r--src/libunwind.cpp95
1 files changed, 65 insertions, 30 deletions
diff --git a/src/libunwind.cpp b/src/libunwind.cpp
index 95f2dc020dc4..f4d71a1863bf 100644
--- a/src/libunwind.cpp
+++ b/src/libunwind.cpp
@@ -1,4 +1,4 @@
-//===--------------------------- libuwind.cpp -----------------------------===//
+//===--------------------------- libunwind.cpp ----------------------------===//
//
// The LLVM Compiler Infrastructure
//
@@ -24,6 +24,8 @@
#include <stdlib.h>
+#if !defined(__USING_SJLJ_EXCEPTIONS__)
+#include "AddressSpace.hpp"
#include "UnwindCursor.hpp"
using namespace libunwind;
@@ -42,23 +44,31 @@ extern int unw_getcontext(unw_context_t *);
/// unw_getcontext().
_LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor,
unw_context_t *context) {
- _LIBUNWIND_TRACE_API("unw_init_local(cursor=%p, context=%p)\n",
+ _LIBUNWIND_TRACE_API("unw_init_local(cursor=%p, context=%p)",
static_cast<void *>(cursor),
static_cast<void *>(context));
#if defined(__i386__)
# define REGISTER_KIND Registers_x86
#elif defined(__x86_64__)
# define REGISTER_KIND Registers_x86_64
+#elif defined(__powerpc64__)
+# define REGISTER_KIND Registers_ppc64
#elif defined(__ppc__)
# define REGISTER_KIND Registers_ppc
#elif defined(__aarch64__)
# define REGISTER_KIND Registers_arm64
-#elif _LIBUNWIND_ARM_EHABI
+#elif defined(__arm__)
# define REGISTER_KIND Registers_arm
#elif defined(__or1k__)
# define REGISTER_KIND Registers_or1k
+#elif defined(__mips__) && defined(_ABIO32) && _MIPS_SIM == _ABIO32
+# define REGISTER_KIND Registers_mips_o32
+#elif defined(__mips64)
+# define REGISTER_KIND Registers_mips_newabi
#elif defined(__mips__)
-# warning The MIPS architecture is not supported.
+# warning The MIPS architecture is not supported with this ABI and environment!
+#elif defined(__sparc__)
+# define REGISTER_KIND Registers_sparc
#else
# error Architecture not supported
#endif
@@ -85,18 +95,18 @@ _LIBUNWIND_EXPORT int unw_init_remote_thread(unw_cursor_t *cursor,
switch (as->cpuType) {
case CPU_TYPE_I386:
new ((void *)cursor)
- UnwindCursor<OtherAddressSpace<Pointer32<LittleEndian> >,
+ UnwindCursor<RemoteAddressSpace<Pointer32<LittleEndian>>,
Registers_x86>(((unw_addr_space_i386 *)as)->oas, arg);
break;
case CPU_TYPE_X86_64:
- new ((void *)cursor) UnwindCursor<
- OtherAddressSpace<Pointer64<LittleEndian> >, Registers_x86_64>(
- ((unw_addr_space_x86_64 *)as)->oas, arg);
+ new ((void *)cursor)
+ UnwindCursor<RemoteAddressSpace<Pointer64<LittleEndian>>,
+ Registers_x86_64>(((unw_addr_space_x86_64 *)as)->oas, arg);
break;
case CPU_TYPE_POWERPC:
new ((void *)cursor)
- UnwindCursor<OtherAddressSpace<Pointer32<BigEndian> >, Registers_ppc>(
- ((unw_addr_space_ppc *)as)->oas, arg);
+ UnwindCursor<RemoteAddressSpace<Pointer32<BigEndian>>,
+ Registers_ppc>(((unw_addr_space_ppc *)as)->oas, arg);
break;
default:
return UNW_EUNSPEC;
@@ -157,7 +167,7 @@ _LIBUNWIND_EXPORT void unw_destroy_addr_space(unw_addr_space_t asp) {
/// Get value of specified register at cursor position in stack frame.
_LIBUNWIND_EXPORT int unw_get_reg(unw_cursor_t *cursor, unw_regnum_t regNum,
unw_word_t *value) {
- _LIBUNWIND_TRACE_API("unw_get_reg(cursor=%p, regNum=%d, &value=%p)\n",
+ _LIBUNWIND_TRACE_API("unw_get_reg(cursor=%p, regNum=%d, &value=%p)",
static_cast<void *>(cursor), regNum,
static_cast<void *>(value));
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
@@ -172,16 +182,28 @@ _LIBUNWIND_EXPORT int unw_get_reg(unw_cursor_t *cursor, unw_regnum_t regNum,
/// Set value of specified register at cursor position in stack frame.
_LIBUNWIND_EXPORT int unw_set_reg(unw_cursor_t *cursor, unw_regnum_t regNum,
unw_word_t value) {
- _LIBUNWIND_TRACE_API("unw_set_reg(cursor=%p, regNum=%d, value=0x%llX)\n",
- static_cast<void *>(cursor), regNum, (long long)value);
+ _LIBUNWIND_TRACE_API("unw_set_reg(cursor=%p, regNum=%d, value=0x%" PRIxPTR ")",
+ static_cast<void *>(cursor), regNum, value);
typedef LocalAddressSpace::pint_t pint_t;
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
if (co->validReg(regNum)) {
co->setReg(regNum, (pint_t)value);
// specical case altering IP to re-find info (being called by personality
// function)
- if (regNum == UNW_REG_IP)
+ if (regNum == UNW_REG_IP) {
+ unw_proc_info_t info;
+ // First, get the FDE for the old location and then update it.
+ co->getInfo(&info);
co->setInfoBasedOnIPRegister(false);
+ // If the original call expects stack adjustment, perform this now.
+ // Normal frame unwinding would have included the offset already in the
+ // CFA computation.
+ // Note: for PA-RISC and other platforms where the stack grows up,
+ // this should actually be - info.gp. LLVM doesn't currently support
+ // any such platforms and Clang doesn't export a macro for them.
+ if (info.gp)
+ co->setReg(UNW_REG_SP, co->getReg(UNW_REG_SP) + info.gp);
+ }
return UNW_ESUCCESS;
}
return UNW_EBADREG;
@@ -191,7 +213,7 @@ _LIBUNWIND_EXPORT int unw_set_reg(unw_cursor_t *cursor, unw_regnum_t regNum,
/// Get value of specified float register at cursor position in stack frame.
_LIBUNWIND_EXPORT int unw_get_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum,
unw_fpreg_t *value) {
- _LIBUNWIND_TRACE_API("unw_get_fpreg(cursor=%p, regNum=%d, &value=%p)\n",
+ _LIBUNWIND_TRACE_API("unw_get_fpreg(cursor=%p, regNum=%d, &value=%p)",
static_cast<void *>(cursor), regNum,
static_cast<void *>(value));
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
@@ -206,11 +228,11 @@ _LIBUNWIND_EXPORT int unw_get_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum,
/// Set value of specified float register at cursor position in stack frame.
_LIBUNWIND_EXPORT int unw_set_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum,
unw_fpreg_t value) {
-#if _LIBUNWIND_ARM_EHABI
- _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%llX)\n",
+#if defined(_LIBUNWIND_ARM_EHABI)
+ _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%llX)",
static_cast<void *>(cursor), regNum, value);
#else
- _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%g)\n",
+ _LIBUNWIND_TRACE_API("unw_set_fpreg(cursor=%p, regNum=%d, value=%g)",
static_cast<void *>(cursor), regNum, value);
#endif
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
@@ -224,7 +246,7 @@ _LIBUNWIND_EXPORT int unw_set_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum,
/// Move cursor to next frame.
_LIBUNWIND_EXPORT int unw_step(unw_cursor_t *cursor) {
- _LIBUNWIND_TRACE_API("unw_step(cursor=%p)\n", static_cast<void *>(cursor));
+ _LIBUNWIND_TRACE_API("unw_step(cursor=%p)", static_cast<void *>(cursor));
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
return co->step();
}
@@ -233,7 +255,7 @@ _LIBUNWIND_EXPORT int unw_step(unw_cursor_t *cursor) {
/// Get unwind info at cursor position in stack frame.
_LIBUNWIND_EXPORT int unw_get_proc_info(unw_cursor_t *cursor,
unw_proc_info_t *info) {
- _LIBUNWIND_TRACE_API("unw_get_proc_info(cursor=%p, &info=%p)\n",
+ _LIBUNWIND_TRACE_API("unw_get_proc_info(cursor=%p, &info=%p)",
static_cast<void *>(cursor), static_cast<void *>(info));
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
co->getInfo(info);
@@ -246,7 +268,7 @@ _LIBUNWIND_EXPORT int unw_get_proc_info(unw_cursor_t *cursor,
/// Resume execution at cursor position (aka longjump).
_LIBUNWIND_EXPORT int unw_resume(unw_cursor_t *cursor) {
- _LIBUNWIND_TRACE_API("unw_resume(cursor=%p)\n", static_cast<void *>(cursor));
+ _LIBUNWIND_TRACE_API("unw_resume(cursor=%p)", static_cast<void *>(cursor));
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
co->jumpto();
return UNW_EUNSPEC;
@@ -256,7 +278,7 @@ _LIBUNWIND_EXPORT int unw_resume(unw_cursor_t *cursor) {
/// Get name of function at cursor position in stack frame.
_LIBUNWIND_EXPORT int unw_get_proc_name(unw_cursor_t *cursor, char *buf,
size_t bufLen, unw_word_t *offset) {
- _LIBUNWIND_TRACE_API("unw_get_proc_name(cursor=%p, &buf=%p, bufLen=%lu)\n",
+ _LIBUNWIND_TRACE_API("unw_get_proc_name(cursor=%p, &buf=%p, bufLen=%lu)",
static_cast<void *>(cursor), static_cast<void *>(buf),
static_cast<unsigned long>(bufLen));
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
@@ -269,7 +291,7 @@ _LIBUNWIND_EXPORT int unw_get_proc_name(unw_cursor_t *cursor, char *buf,
/// Checks if a register is a floating-point register.
_LIBUNWIND_EXPORT int unw_is_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum) {
- _LIBUNWIND_TRACE_API("unw_is_fpreg(cursor=%p, regNum=%d)\n",
+ _LIBUNWIND_TRACE_API("unw_is_fpreg(cursor=%p, regNum=%d)",
static_cast<void *>(cursor), regNum);
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
return co->validFloatReg(regNum);
@@ -279,7 +301,7 @@ _LIBUNWIND_EXPORT int unw_is_fpreg(unw_cursor_t *cursor, unw_regnum_t regNum) {
/// Checks if a register is a floating-point register.
_LIBUNWIND_EXPORT const char *unw_regname(unw_cursor_t *cursor,
unw_regnum_t regNum) {
- _LIBUNWIND_TRACE_API("unw_regname(cursor=%p, regNum=%d)\n",
+ _LIBUNWIND_TRACE_API("unw_regname(cursor=%p, regNum=%d)",
static_cast<void *>(cursor), regNum);
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
return co->getRegisterName(regNum);
@@ -288,7 +310,7 @@ _LIBUNWIND_EXPORT const char *unw_regname(unw_cursor_t *cursor,
/// Checks if current frame is signal trampoline.
_LIBUNWIND_EXPORT int unw_is_signal_frame(unw_cursor_t *cursor) {
- _LIBUNWIND_TRACE_API("unw_is_signal_frame(cursor=%p)\n",
+ _LIBUNWIND_TRACE_API("unw_is_signal_frame(cursor=%p)",
static_cast<void *>(cursor));
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
return co->isSignalFrame();
@@ -297,7 +319,7 @@ _LIBUNWIND_EXPORT int unw_is_signal_frame(unw_cursor_t *cursor) {
#ifdef __arm__
// Save VFP registers d0-d15 using FSTMIADX instead of FSTMIADD
_LIBUNWIND_EXPORT void unw_save_vfp_as_X(unw_cursor_t *cursor) {
- _LIBUNWIND_TRACE_API("unw_fpreg_save_vfp_as_X(cursor=%p)\n",
+ _LIBUNWIND_TRACE_API("unw_fpreg_save_vfp_as_X(cursor=%p)",
static_cast<void *>(cursor));
AbstractUnwindCursor *co = (AbstractUnwindCursor *)cursor;
return co->saveVFPAsX();
@@ -305,11 +327,11 @@ _LIBUNWIND_EXPORT void unw_save_vfp_as_X(unw_cursor_t *cursor) {
#endif
-#if _LIBUNWIND_SUPPORT_DWARF_UNWIND
-/// SPI: walks cached dwarf entries
+#if defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND)
+/// SPI: walks cached DWARF entries
_LIBUNWIND_EXPORT void unw_iterate_dwarf_unwind_cache(void (*func)(
unw_word_t ip_start, unw_word_t ip_end, unw_word_t fde, unw_word_t mh)) {
- _LIBUNWIND_TRACE_API("unw_iterate_dwarf_unwind_cache(func=%p)\n",
+ _LIBUNWIND_TRACE_API("unw_iterate_dwarf_unwind_cache(func=%p)",
reinterpret_cast<void *>(func));
DwarfFDECache<LocalAddressSpace>::iterateCacheEntries(func);
}
@@ -339,7 +361,8 @@ void _unw_remove_dynamic_fde(unw_word_t fde) {
// fde is own mh_group
DwarfFDECache<LocalAddressSpace>::removeAllIn((LocalAddressSpace::pint_t)fde);
}
-#endif // _LIBUNWIND_SUPPORT_DWARF_UNWIND
+#endif // defined(_LIBUNWIND_SUPPORT_DWARF_UNWIND)
+#endif // !defined(__USING_SJLJ_EXCEPTIONS__)
@@ -371,5 +394,17 @@ bool logUnwinding() {
return log;
}
+_LIBUNWIND_HIDDEN
+bool logDWARF() {
+ // do manual lock to avoid use of _cxa_guard_acquire or initializers
+ static bool checked = false;
+ static bool log = false;
+ if (!checked) {
+ log = (getenv("LIBUNWIND_PRINT_DWARF") != NULL);
+ checked = true;
+ }
+ return log;
+}
+
#endif // NDEBUG
generated by cgit v1.2.3 (git 2.25.1) at 2025-10-10 16:09:17 +0000