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Diffstat (limited to 'source/Expression/ClangUtilityFunction.cpp')
| -rw-r--r-- | source/Expression/ClangUtilityFunction.cpp | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/source/Expression/ClangUtilityFunction.cpp b/source/Expression/ClangUtilityFunction.cpp new file mode 100644 index 000000000000..c911c279993f --- /dev/null +++ b/source/Expression/ClangUtilityFunction.cpp @@ -0,0 +1,169 @@ +//===-- ClangUserExpression.cpp -------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +// C Includes +#include <stdio.h> +#if HAVE_SYS_TYPES_H +# include <sys/types.h> +#endif + +// C++ Includes + +#include "lldb/Core/ConstString.h" +#include "lldb/Core/Log.h" +#include "lldb/Core/Stream.h" +#include "lldb/Core/StreamFile.h" +#include "lldb/Expression/ClangExpressionDeclMap.h" +#include "lldb/Expression/ClangExpressionParser.h" +#include "lldb/Expression/ClangUtilityFunction.h" +#include "lldb/Expression/ExpressionSourceCode.h" +#include "lldb/Expression/IRExecutionUnit.h" +#include "lldb/Host/Host.h" +#include "lldb/Target/ExecutionContext.h" +#include "lldb/Target/Target.h" + +using namespace lldb_private; + +//------------------------------------------------------------------ +/// Constructor +/// +/// @param[in] text +/// The text of the function. Must be a full translation unit. +/// +/// @param[in] name +/// The name of the function, as used in the text. +//------------------------------------------------------------------ +ClangUtilityFunction::ClangUtilityFunction (const char *text, + const char *name) : + ClangExpression (), + m_function_text (ExpressionSourceCode::g_expression_prefix), + m_function_name (name) +{ + if (text && text[0]) + m_function_text.append (text); +} + +ClangUtilityFunction::~ClangUtilityFunction () +{ +} + +//------------------------------------------------------------------ +/// Install the utility function into a process +/// +/// @param[in] error_stream +/// A stream to print parse errors and warnings to. +/// +/// @param[in] exe_ctx +/// The execution context to install the utility function to. +/// +/// @return +/// True on success (no errors); false otherwise. +//------------------------------------------------------------------ +bool +ClangUtilityFunction::Install (Stream &error_stream, + ExecutionContext &exe_ctx) +{ + if (m_jit_start_addr != LLDB_INVALID_ADDRESS) + { + error_stream.PutCString("error: already installed\n"); + return false; + } + + //////////////////////////////////// + // Set up the target and compiler + // + + Target *target = exe_ctx.GetTargetPtr(); + + if (!target) + { + error_stream.PutCString ("error: invalid target\n"); + return false; + } + + Process *process = exe_ctx.GetProcessPtr(); + + if (!process) + { + error_stream.PutCString ("error: invalid process\n"); + return false; + } + + ////////////////////////// + // Parse the expression + // + + bool keep_result_in_memory = false; + + m_expr_decl_map.reset(new ClangExpressionDeclMap(keep_result_in_memory, exe_ctx)); + + if (!m_expr_decl_map->WillParse(exe_ctx, NULL)) + { + error_stream.PutCString ("error: current process state is unsuitable for expression parsing\n"); + return false; + } + + ClangExpressionParser parser(exe_ctx.GetBestExecutionContextScope(), *this); + + unsigned num_errors = parser.Parse (error_stream); + + if (num_errors) + { + error_stream.Printf ("error: %d errors parsing expression\n", num_errors); + + m_expr_decl_map.reset(); + + return false; + } + + ////////////////////////////////// + // JIT the output of the parser + // + + bool can_interpret = false; // should stay that way + + Error jit_error = parser.PrepareForExecution (m_jit_start_addr, + m_jit_end_addr, + m_execution_unit_ap, + exe_ctx, + can_interpret, + eExecutionPolicyAlways); + + if (m_jit_start_addr != LLDB_INVALID_ADDRESS) + m_jit_process_wp = lldb::ProcessWP(process->shared_from_this()); + +#if 0 + // jingham: look here + StreamFile logfile ("/tmp/exprs.txt", "a"); + logfile.Printf ("0x%16.16" PRIx64 ": func = %s, source =\n%s\n", + m_jit_start_addr, + m_function_name.c_str(), + m_function_text.c_str()); +#endif + + m_expr_decl_map->DidParse(); + + m_expr_decl_map.reset(); + + if (jit_error.Success()) + { + return true; + } + else + { + const char *error_cstr = jit_error.AsCString(); + if (error_cstr && error_cstr[0]) + error_stream.Printf ("error: %s\n", error_cstr); + else + error_stream.Printf ("error: expression can't be interpreted or run\n"); + return false; + } +} + + |