This patch removes the static accessor in File to get a file's
permissions. Permissions should be checked through the FileSystem class.
llvm-svn: 345901
This patch removes the logic for resolving paths out of FileSpec and
updates call sites to rely on the FileSystem class instead.
Differential revision: https://reviews.llvm.org/D53915
llvm-svn: 345890
This patch should not introduce any behavior changes. It consists of
mostly one of two changes:
1. Replacing fall through comments with the LLVM_FALLTHROUGH macro
2. Inserting 'break' before falling through into a case block consisting
of only 'break'.
We were already using this warning with GCC, but its warning behaves
slightly differently. In this patch, the following differences are
relevant:
1. GCC recognizes comments that say "fall through" as annotations, clang
doesn't
2. GCC doesn't warn on "case N: foo(); default: break;", clang does
3. GCC doesn't warn when the case contains a switch, but falls through
the outer case.
I will enable the warning separately in a follow-up patch so that it can
be cleanly reverted if necessary.
Reviewers: alexfh, rsmith, lattner, rtrieu, EricWF, bollu
Differential Revision: https://reviews.llvm.org/D53950
llvm-svn: 345882
There were some calls left to Exists() on non-darwin platforms (Windows,
Linux and FreeBSD) that weren't yet updated to use the FileSystem.
llvm-svn: 345857
This patch removes the Exists method from FileSpec and updates its uses
with calls to the FileSystem.
Differential revision: https://reviews.llvm.org/D53845
llvm-svn: 345854
This patch removes the ResolveExecutableLocation method from FileSpec
and updates its uses with calls to the FileSystem.
Differential revision: https://reviews.llvm.org/D53834
llvm-svn: 345853
Speculative fix for the Xcode bots where we were seeing the assertion
being triggered because we would re-initialize the FileSystem without
terminating it.
llvm-svn: 345849
This adds basic support for getting function signature types
into LLDB's type system, including into clang's AST. There are
a few edge cases which are not correctly handled, mostly dealing
with nested classes, but this isn't specific to functions and
apply equally to variable types. Note that no attempt has been
made yet to deal with member function types, which will happen
in subsequent patches.
Differential Revision: https://reviews.llvm.org/D53951
llvm-svn: 345848
This patch removes the GetPermissions and GetReadable methods from
FileSpec and updates its uses with calls to the FileSystem.
Differential revision: https://reviews.llvm.org/D53831
llvm-svn: 345843
Summary:
This patch adds a basic implementation of `DoAllocateMemory` and
`DoDeallocateMemory` for Windows processes. For now it considers only the
executable permission (and always allows reads and writes).
Reviewers: zturner, asmith, stella.stamenova, labath, clayborg
Reviewed By: zturner
Subscribers: Hui, vsk, jingham, aleksandr.urakov, clayborg, abidh, teemperor, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D52618
llvm-svn: 345815
This patch removes the GetByteSize method from FileSpec and updates its
uses with calls to the FileSystem.
Differential revision: https://reviews.llvm.org/D53788
llvm-svn: 345812
This patch moves the EnumerateDirectory functionality and related enum
and typedef from FileSpec to FileSystem.
This is part of a set of patches that extracts file system related
convenience methods from FileSpec. The long term goal is to remove this
method altogether and use the iterators directly, but for introducing
the VFS into LLDB this change is sufficient.
Differential revision: https://reviews.llvm.org/D53785
llvm-svn: 345800
The new implementation of EnumerateDirectory relies on `::no_push()`
being implemented for the VFS recursive directory iterators. However
this patch (D53465) hasn't been landed yet.
llvm-svn: 345787
This patch extends the FileSystem class with a bunch of functions that
are currently implemented as methods of the FileSpec class. These
methods will be removed in future commits and replaced by calls to the
file system.
The new functions are operated in terms of the virtual file system which
was recently moved from clang into LLVM so it could be reused in lldb.
Because the VFS is stateful, we turned the FileSystem class into a
singleton.
Differential revision: https://reviews.llvm.org/D53532
llvm-svn: 345783
This is NFC to clean up the `DWARFFormValue::ExtractValue`.
It groups similar `DW_FORM_*` and removes an excessive
assignment of `ref_addr_size` (it was assigned right after in any case).
llvm-svn: 345733
This adds the support for DW_FORM_addrx, DW_FORM_addrx1,
DW_FORM_addrx2, DW_FORM_addrx3, DW_FORM_addrx4 forms.
Differential revision: https://reviews.llvm.org/D53813
llvm-svn: 345706
This patch introduces a concept of "frame recognizer" and "recognized frame". This should be an extensible mechanism that retrieves information about special frames based on ABI, arguments or other special properties of that frame, even without source code. A few examples where that could be useful could be 1) objc_exception_throw, where we'd like to get the current exception, 2) terminate_with_reason and extracting the current terminate string, 3) recognizing Objective-C frames and automatically extracting the receiver+selector, or perhaps all arguments (based on selector).
Differential Revision: https://reviews.llvm.org/D44603
llvm-svn: 345693
This patch introduces a concept of "frame recognizer" and "recognized frame". This should be an extensible mechanism that retrieves information about special frames based on ABI, arguments or other special properties of that frame, even without source code. A few examples where that could be useful could be 1) objc_exception_throw, where we'd like to get the current exception, 2) terminate_with_reason and extracting the current terminate string, 3) recognizing Objective-C frames and automatically extracting the receiver+selector, or perhaps all arguments (based on selector).
Differential Revision: https://reviews.llvm.org/D44603
llvm-svn: 345686
This patch introduces a concept of "frame recognizer" and "recognized frame". This should be an extensible mechanism that retrieves information about special frames based on ABI, arguments or other special properties of that frame, even without source code. A few examples where that could be useful could be 1) objc_exception_throw, where we'd like to get the current exception, 2) terminate_with_reason and extracting the current terminate string, 3) recognizing Objective-C frames and automatically extracting the receiver+selector, or perhaps all arguments (based on selector).
Differential Revision: https://reviews.llvm.org/D44603
llvm-svn: 345678
We haven't supported compiling ObjC1 for a long time (and never will again), so
there isn't any reason to keep these separate. This patch replaces
LangOpts::ObjC1 and LangOpts::ObjC2 with LangOpts::ObjC.
Differential revision: https://reviews.llvm.org/D53547
llvm-svn: 345637
Previous patches added support for dumping global variables of
primitive types, so we now do the same for class types.
For the most part, everything just worked, there was only one
minor bug needing fixed, which was that for variables of modified
types (e.g. const, volatile, etc) we can't resolve the forward
decl in CreateAndCacheType because the PdbSymUid must point to the
LF_MODIFIER which must point to the forward decl. So when it comes
time to call CompleteType, an assert was firing because we expected
to get a class, struct, union, or enum, but we were getting an
LF_MODIFIER instead.
The other issue is that one the newly added tests is for an array
member, which was not yet supported, so we add support for that
now in this patch.
There's probably room for other interesting layout test cases
here, but this at least should test the basics.
Differential Revision: https://reviews.llvm.org/D53822
llvm-svn: 345629
Summary:
This patch fixes issues with a stack realignment.
MSVC maintains two frame pointers (`ebx` and `ebp`) for a realigned stack - one
is used for access to function parameters, while another is used for access to
locals. To support this the patch:
- adds an alternative frame pointer (`ebx`);
- considers stack realignment instructions (e.g. `and esp, -32`);
- along with CFA (Canonical Frame Address) which point to the position next to
the saved return address (or to the first parameter on the stack) introduces
AFA (Aligned Frame Address) which points to the position of the stack pointer
right after realignment. AFA is used for access to registers saved after the
realignment (see the test);
Here is an example of the code with the realignment:
```
struct __declspec(align(256)) OverAligned {
char c;
};
void foo(int foo_arg) {
OverAligned oa_foo = { 1 };
auto aaa_foo = 1234;
}
void bar(int bar_arg) {
OverAligned oa_bar = { 2 };
auto aaa_bar = 5678;
foo(1111);
}
int main() {
bar(2222);
return 0;
}
```
and here is the `bar` disassembly:
```
push ebx
mov ebx, esp
sub esp, 8
and esp, -100h
add esp, 4
push ebp
mov ebp, [ebx+4]
mov [esp+4], ebp
mov ebp, esp
sub esp, 200h
mov byte ptr [ebp-200h], 2
mov dword ptr [ebp-4], 5678
push 1111 ; foo_arg
call j_?foo@@YAXH@Z ; foo(int)
add esp, 4
mov esp, ebp
pop ebp
mov esp, ebx
pop ebx
retn
```
Reviewers: labath, zturner, jasonmolenda, stella.stamenova
Reviewed By: jasonmolenda
Subscribers: abidh, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D53435
llvm-svn: 345577
Only attempt to link against Backtrace if it is found. Without this,
trying to cross-compile to Windows would try to link against
"Backtrace_LIBRARY-NOTFOUND.lib".
llvm-svn: 345569
Summary:
When evaluating expressions the generic arguments registers are required by ABI.
This patch defines them.
Reviewers: zturner, stella.stamenova, labath
Subscribers: aleksandr.urakov, lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D53753
llvm-svn: 345385
LLDB has the ability to display global variables, even without a running
process, via the target variable command. This is because global
variables are linker initialized, so their values are embedded directly
into the executables. This gives us great power for testing native PDB
functionality in a cross-platform manner, because we don't actually need
a running process. We can just create a target using an EXE file, and
display global variables. And global variables can have arbitrarily
complex types, so in theory we can fully exercise the type system,
record layout, and data formatters for native PDB files and PE/COFF
executables on any host platform, as long as our type does not require a
dynamic initializer.
This patch adds basic support for finding variables by name, and adds an
exhaustive test for fundamental data types and pointers / references to
fundamental data types.
Subsequent patches will extend this to typedefs, classes, pointers to
functions, and other cases.
Differential Revision: https://reviews.llvm.org/D53731
llvm-svn: 345373
For the reproducer feature I need to be able to export and import the
current LLDB configuration. To realize this I've extended the existing
functionality to print settings. With the help of a new formatting
option, we can now write the settings and their values to a file
structured as regular commands.
Concretely the functionality works as follows:
(lldb) settings export -f /path/to/file
This file contains a bunch of settings set commands, followed by the
setting's name and value.
...
settings set use-external-editor false
settings set use-color true
settings set auto-one-line-summaries true
settings set auto-indent true
...
You can import the settings again by either sourcing the file or using
the settings read command.
(lldb) settings read -f /path/to/file
Differential revision: https://reviews.llvm.org/D52651
llvm-svn: 345346
This is similar to D53597, but following up with 2 more enums.
After this, all flag enums should be strongly typed all the way
through to the symbol files plugins.
Differential Revision: https://reviews.llvm.org/D53616
llvm-svn: 345314
When we get the `resolve_scope` parameter from the SB API, it's a
`uint32_t`. We then pass it through all of LLDB this way, as a uint32.
This is unfortunate, because it means the user of an API never actually
knows what they're dealing with. We can call it something like
`resolve_scope` and have comments saying "this is a value from the
`SymbolContextItem` enumeration, but it makes more sense to just have it
actually *be* the correct type in the actual C++ type system to begin
with. This way the person reading the code just knows what it is.
The reason to use integers instead of enumerations for flags is because
when you do bitwise operations on enumerations they get promoted to
integers, so it makes it tedious to constantly be casting them back
to the enumeration types, so I've introduced a macro to make this
happen magically. By writing LLDB_MARK_AS_BITMASK_ENUM after defining
an enumeration, it will define overloaded operators so that the
returned type will be the original enum. This should address all
the mechanical issues surrounding using rich enum types directly.
This way, we get a better debugger experience, and new users to
the codebase can get more easily acquainted with the codebase because
their IDE features can help them understand what the types mean.
Differential Revision: https://reviews.llvm.org/D53597
llvm-svn: 345313
We currently had a 2-step process where we had to call
SetBaseClassesForType and DeleteBaseClasses. Every single caller
followed this exact 2-step process, and there was manual memory
management going on with raw pointers. We can do better than this
by storing a vector of unique_ptrs and passing this around.
This makes for a cleaner API, and we only need to call one method
so there is no possibility of a user forgetting to call
DeleteBaseClassSpecifiers.
In addition to this, it also makes for a *simpler* API. Part of
why I wanted to do this is because when I was implementing the native
PDB interface I had to spend some time understanding exactly what I
was deleting and why. ClangAST has significant mental overhead
associated with it, and reducing the API surface can go along
way to making it simpler for people to understand.
Differential Revision: https://reviews.llvm.org/D53590
llvm-svn: 345312
This fixes a bug PlatformDarwin::SDKSupportsModule introduced by
https://reviews.llvm.org/D47889. VersionTuple::tryParse() can deal
with an optional third (micro) component, but the parse will fail when
there are extra characters after the version number (e.g.: trying to
parse the substring "12.0.sdk" out of "iPhoneSimulator12.0.sdk" fails
after that patch). Fixed here by stripping the ".sdk" suffix first.
(Part of) rdar://problem/45041492
Differential Revision https://reviews.llvm.org/D53677
llvm-svn: 345274
With the fix: do not forget to hanlde the DW_RLE_start_end, which seems was
omited/forgotten/removed by mistake.
Original commit message:
The patch implements the support for DW_RLE_base_address and DW_RLE_offset_pair
.debug_rnglists entries
Differential revision: https://reviews.llvm.org/D53140
----
Added : /lldb/trunk/lit/Breakpoint/Inputs/debug_rnglist_offset_pair.yaml
Added : /lldb/trunk/lit/Breakpoint/debug_rnglist_offset_pair.test
Modified : /lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugInfoEntry.cpp
Modified : /lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugRanges.cpp
Modified : /lldb/trunk/source/Plugins/SymbolFile/DWARF/DWARFDebugRanges.h
Modified : /lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
Modified : /lldb/trunk/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
llvm-svn: 345251
Currently, we always parse the length field of DW_LLE_startx_length entry as U32.
That is correct for pre-standard definition:
https://gcc.gnu.org/wiki/DebugFission - "A start/length entry contains one unsigned LEB128 number
and a 4-byte unsigned value (as would be represented by the form code DW_FORM_const4u). The first
number is an index into the .debug_addr section that selects the beginning offset, and the second
number is the length of the range. ")
But DWARF v5 says: "This is a form of bounded location description that has two unsigned ULEB operands.
The first value is an address index (into the .debug_addr section) that indicates the beginning of the address
range over which the location is valid. The second value is the length of the range."
Fortunately, we can easily handle the difference. No test case because it seems impossible to test
until we will be ready to use DWARF v5 in tests that need to run the executables.
Differential revision: https://reviews.llvm.org/D53646
llvm-svn: 345249
The -force option allows you to pass an empty value to settings set to
reset the value to its default. This means that the following operations
are equivalent:
settings set -f <setting>
settings clear <setting>
The motivation for this change is the ability to export and import
settings from LLDB. Because of the way the dumpers work, we don't know
whether a value is going to be the default or not. Hence we cannot use
settings clear and use settings set -f, potentially providing an empty
value.
Differential revision: https://reviews.llvm.org/D52772
llvm-svn: 345207
The patch implements the support for DW_RLE_base_address and DW_RLE_offset_pair
.debug_rnglists entries
Differential revision: https://reviews.llvm.org/D53140
llvm-svn: 345127
Jonas Devlieghere