llvm-project.git/libunwind/src/FrameHeaderCache.hpp, branch main Unnamed repository; edit this file 'description' to name the repository. [libunwind] Fix a -Wextra-semi warning 2023-09-29T22:10:05+00:00 Alex Richardson alexrichardson@google.com 2023-09-29T18:53:23+00:00 e83eb23a2cff061adba41aae5d7304674c87c306 






[runtimes] Fix some duplicate word typos
2023-08-31T15:55:10+00:00

Louis Dionne
ldionne.2@gmail.com

2023-08-31T15:52:06+00:00

b397921fc7ef4e2882b3ae9c5f12fb40daca4078

Those fixes were taken from https://reviews.llvm.org/D137338.





Those fixes were taken from https://reviews.llvm.org/D137338.







[libunwind][DWARF] Fix end of .eh_frame calculation
2020-09-17T02:00:57+00:00

Ryan Prichard
rprichard@google.com

2020-09-16T08:22:55+00:00

fb1abe00635c1ec28e55921709904d5ca2e86a74

 * When .eh_frame is located using .eh_frame_hdr (PT_GNU_EH_FRAME), the
   start of .eh_frame is known, but not the size. In this case, the
   unwinder must rely on a terminator present at the end of .eh_frame.
   Set dwarf_section_length to UINTPTR_MAX to indicate this.

 * Add a new field, text_segment_length, that the FrameHeaderCache uses
   to track the size of the PT_LOAD segment indicated by dso_base.

 * Compute ehSectionEnd by adding sectionLength to ehSectionStart,
   never to fdeHint.

Fixes PR46829.

Differential Revision: https://reviews.llvm.org/D87750





 * When .eh_frame is located using .eh_frame_hdr (PT_GNU_EH_FRAME), the
   start of .eh_frame is known, but not the size. In this case, the
   unwinder must rely on a terminator present at the end of .eh_frame.
   Set dwarf_section_length to UINTPTR_MAX to indicate this.

 * Add a new field, text_segment_length, that the FrameHeaderCache uses
   to track the size of the PT_LOAD segment indicated by dso_base.

 * Compute ehSectionEnd by adding sectionLength to ehSectionStart,
   never to fdeHint.

Fixes PR46829.

Differential Revision: https://reviews.llvm.org/D87750







Cache uwnind frame headers as they are found.
2020-03-12T17:53:33+00:00

Sterling Augustine
saugustine@google.com

2020-03-10T19:03:24+00:00

c53c2058ffb8ff877702bb2dded31c85c1dfe66d

Summary:
This improves unwind performance quite substantially, and follows
a somewhat similar approach used in libgcc_s as described in the
thread here:

https://gcc.gnu.org/ml/gcc/2005-02/msg00625.html

On certain extremely exception heavy internal tests, the time
drops from about 80 minutes to about five minutes.

Subscribers: libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D75954





Summary:
This improves unwind performance quite substantially, and follows
a somewhat similar approach used in libgcc_s as described in the
thread here:

https://gcc.gnu.org/ml/gcc/2005-02/msg00625.html

On certain extremely exception heavy internal tests, the time
drops from about 80 minutes to about five minutes.

Subscribers: libcxx-commits

Tags: #libc

Differential Revision: https://reviews.llvm.org/D75954