Dynamically composite xml in reply to GDB
GDBserver still uses pre-generated target descriptions in order to reply to GDB's query on target description (see xml-builtin-generated.c in GDBserver build directory). This patch teaches GDBserver to create XML contents according to the target descriptions rather than using pre-generated ones. First, change target feature c files to pass the feature xml file name to tdesc_create_feature, so that target description in GDBserver can record them, and create XML contents from these features in buffer, like ... <xi:include href="$FEATURE1_XML_NAME"/> <xi:include href="$FEATURE2_XML_NAME"/> ... and send this buffer back to GDB. Note that this patch reuses target_desc.xmltarget a little bit, which is to hold the XML contents dynamically generated in tdesc_get_features_xml. However, it is not xfree'ed in ~target_desc, because we can't tell it is from xstrdup or a literal string. Since we don't delete target_desc, there is no memory leak yet. After we change all target descriptions to the new style, target_desc.xmltarget is from xstrdup, then, we can safely xfree it in ~target_desc. gdb: 2017-09-05 Yao Qi <yao.qi@linaro.org> * arch/tdesc.h (tdesc_create_feature): Add an argument xml. * target-descriptions.c (tdesc_create_feature): Likewise, and adjust code. * features/i386/32bit-avx.c: Re-generated. * features/i386/32bit-avx512.c: Re-generated. * features/i386/32bit-core.c: Re-generated. * features/i386/32bit-linux.c: Re-generated. * features/i386/32bit-mpx.c: Re-generated. * features/i386/32bit-pkeys.c: Re-generated. * features/i386/32bit-sse.c: Re-generated. gdb/gdbserver: 2017-09-05 Yao Qi <yao.qi@linaro.org> * linux-x86-tdesc.c: Don't include <inttypes.h>. (i386_linux_read_description) [!IN_PROCESS_AGENT]: Call set_tdesc_architecture and set_tdesc_osabi. Remove code setting .xmltarget. * server.c (get_features_xml): Call tdesc_get_features_xml. * tdesc.c (set_tdesc_architecture): New function. (set_tdesc_osabi): New function. (tdesc_get_features_xml): New function. (tdesc_create_feature): Add an argument. * tdesc.h (struct target_desc) <features>: New field. <arch, osabi>: New field. (~target_desc): xfree features, arch, and osabi. (target_desc::oerator==): Don't compare .xmltarget. [!IN_PROCESS_AGENT] (set_tdesc_architecture): Declare. (set_tdesc_osabi): Likewise. (tdesc_get_features_xml): Likewise.
This commit is contained in:
Yao Qi
parent
0a188386c0
commit
0abe8a8992
@ -1,3 +1,16 @@
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2017-09-05 Yao Qi <yao.qi@linaro.org>
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* arch/tdesc.h (tdesc_create_feature): Add an argument xml.
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* target-descriptions.c (tdesc_create_feature): Likewise, and
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adjust code.
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* features/i386/32bit-avx.c: Re-generated.
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* features/i386/32bit-avx512.c: Re-generated.
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* features/i386/32bit-core.c: Re-generated.
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* features/i386/32bit-linux.c: Re-generated.
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* features/i386/32bit-mpx.c: Re-generated.
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* features/i386/32bit-pkeys.c: Re-generated.
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* features/i386/32bit-sse.c: Re-generated.
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2017-09-05 Yao Qi <yao.qi@linaro.org>
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* regformats/regdef.h (struct reg): Override operator == and !=.
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@ -30,7 +30,9 @@ struct tdesc_type *tdesc_named_type (const struct tdesc_feature *feature,
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/* Return the created feature named NAME in target description TDESC. */
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struct tdesc_feature *tdesc_create_feature (struct target_desc *tdesc,
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const char *name);
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const char *name,
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const char *xml = nullptr);
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/* Return the created vector tdesc_type named NAME in FEATURE. */
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struct tdesc_type *tdesc_create_vector (struct tdesc_feature *feature,
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@ -8,7 +8,7 @@ create_feature_i386_32bit_avx (struct target_desc *result, long regnum)
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{
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struct tdesc_feature *feature;
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.avx");
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.avx", "32bit-avx.xml");
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tdesc_create_reg (feature, "ymm0h", regnum++, 1, NULL, 128, "uint128");
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tdesc_create_reg (feature, "ymm1h", regnum++, 1, NULL, 128, "uint128");
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tdesc_create_reg (feature, "ymm2h", regnum++, 1, NULL, 128, "uint128");
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@ -8,7 +8,7 @@ create_feature_i386_32bit_avx512 (struct target_desc *result, long regnum)
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{
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struct tdesc_feature *feature;
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.avx512");
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.avx512", "32bit-avx512.xml");
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struct tdesc_type *field_type;
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field_type = tdesc_named_type (feature, "uint128");
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tdesc_create_vector (feature, "v2ui128", field_type, 2);
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@ -8,7 +8,7 @@ create_feature_i386_32bit_core (struct target_desc *result, long regnum)
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{
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struct tdesc_feature *feature;
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.core");
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.core", "32bit-core.xml");
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struct tdesc_type *field_type;
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struct tdesc_type *type;
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type = tdesc_create_flags (feature, "i386_eflags", 4);
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@ -8,7 +8,7 @@ create_feature_i386_32bit_linux (struct target_desc *result, long regnum)
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{
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struct tdesc_feature *feature;
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.linux");
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.linux", "32bit-linux.xml");
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regnum = 41;
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tdesc_create_reg (feature, "orig_eax", regnum++, 1, NULL, 32, "int");
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return regnum;
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@ -8,7 +8,7 @@ create_feature_i386_32bit_mpx (struct target_desc *result, long regnum)
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{
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struct tdesc_feature *feature;
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.mpx");
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.mpx", "32bit-mpx.xml");
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struct tdesc_type *field_type;
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struct tdesc_type *type;
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type = tdesc_create_struct (feature, "br128");
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@ -8,7 +8,7 @@ create_feature_i386_32bit_pkeys (struct target_desc *result, long regnum)
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{
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struct tdesc_feature *feature;
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.pkeys");
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.pkeys", "32bit-pkeys.xml");
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tdesc_create_reg (feature, "pkru", regnum++, 1, NULL, 32, "uint32");
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return regnum;
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}
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@ -8,7 +8,7 @@ create_feature_i386_32bit_sse (struct target_desc *result, long regnum)
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{
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struct tdesc_feature *feature;
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.sse");
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feature = tdesc_create_feature (result, "org.gnu.gdb.i386.sse", "32bit-sse.xml");
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struct tdesc_type *field_type;
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field_type = tdesc_named_type (feature, "ieee_single");
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tdesc_create_vector (feature, "v4f", field_type, 4);
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@ -1,3 +1,22 @@
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2017-09-05 Yao Qi <yao.qi@linaro.org>
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* linux-x86-tdesc.c: Don't include <inttypes.h>.
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(i386_linux_read_description) [!IN_PROCESS_AGENT]: Call
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set_tdesc_architecture and set_tdesc_osabi. Remove code setting
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.xmltarget.
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* server.c (get_features_xml): Call tdesc_get_features_xml.
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* tdesc.c (set_tdesc_architecture): New function.
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(set_tdesc_osabi): New function.
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(tdesc_get_features_xml): New function.
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(tdesc_create_feature): Add an argument.
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* tdesc.h (struct target_desc) <features>: New field.
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<arch, osabi>: New field.
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(~target_desc): xfree features, arch, and osabi.
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(target_desc::oerator==): Don't compare .xmltarget.
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[!IN_PROCESS_AGENT] (set_tdesc_architecture): Declare.
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(set_tdesc_osabi): Likewise.
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(tdesc_get_features_xml): Likewise.
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2017-09-05 Yao Qi <yao.qi@linaro.org>
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* linux-x86-tdesc.c: Include selftest.h.
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@ -21,7 +21,6 @@
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#include "tdesc.h"
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#include "linux-x86-tdesc.h"
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#include "x86-xstate.h"
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#include <inttypes.h>
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#if defined __i386__ || !defined IN_PROCESS_AGENT
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#include "../features/i386/32bit-core.c"
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@ -145,6 +144,11 @@ i386_linux_read_description (uint64_t xcr0)
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{
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*tdesc = new target_desc ();
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#ifndef IN_PROCESS_AGENT
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set_tdesc_architecture (*tdesc, "i386");
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set_tdesc_osabi (*tdesc, "GNU/Linux");
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#endif
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long regnum = 0;
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if (xcr0 & X86_XSTATE_X87)
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@ -172,24 +176,6 @@ i386_linux_read_description (uint64_t xcr0)
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#ifndef IN_PROCESS_AGENT
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static const char *expedite_regs_i386[] = { "ebp", "esp", "eip", NULL };
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(*tdesc)->expedite_regs = expedite_regs_i386;
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if (xcr0 & X86_XSTATE_PKRU)
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(*tdesc)->xmltarget = "i386-avx-mpx-avx512-pku-linux.xml";
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else if (xcr0 & X86_XSTATE_AVX512)
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(*tdesc)->xmltarget = "i386-avx-avx512-linux.xml";
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else if ((xcr0 & X86_XSTATE_AVX_MPX_MASK) == X86_XSTATE_AVX_MPX_MASK)
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(*tdesc)->xmltarget = "i386-avx-mpx-linux.xml";
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else if (xcr0 & X86_XSTATE_MPX)
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(*tdesc)->xmltarget = "i386-mpx-linux.xml";
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else if (xcr0 & X86_XSTATE_AVX)
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(*tdesc)->xmltarget = "i386-avx-linux.xml";
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else if (xcr0 & X86_XSTATE_SSE)
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(*tdesc)->xmltarget = "i386-linux.xml";
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else if (xcr0 & X86_XSTATE_X87)
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(*tdesc)->xmltarget = "i386-mmx-linux.xml";
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else
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internal_error (__FILE__, __LINE__,
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"unknown xcr0: %" PRIu64, xcr0);
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#endif
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}
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@ -873,12 +873,14 @@ get_features_xml (const char *annex)
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This variable is set up from the auto-generated
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init_registers_... routine for the current target. */
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if (desc->xmltarget != NULL && strcmp (annex, "target.xml") == 0)
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if (strcmp (annex, "target.xml") == 0)
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{
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if (*desc->xmltarget == '@')
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return desc->xmltarget + 1;
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const char *ret = tdesc_get_features_xml ((target_desc*) desc);
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if (*ret == '@')
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return ret + 1;
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else
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annex = desc->xmltarget;
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annex = ret;
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}
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#ifdef USE_XML
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@ -61,6 +61,62 @@ current_target_desc (void)
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return current_process ()->tdesc;
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}
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void
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set_tdesc_architecture (struct target_desc *target_desc,
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const char *name)
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{
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target_desc->arch = xstrdup (name);
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}
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void
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set_tdesc_osabi (struct target_desc *target_desc, const char *name)
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{
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target_desc->osabi = xstrdup (name);
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}
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/* Return a string which is of XML format, including XML target
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description to be sent to GDB. */
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const char *
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tdesc_get_features_xml (target_desc *tdesc)
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{
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/* Either .xmltarget or .features is not NULL. */
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gdb_assert (tdesc->xmltarget != NULL
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|| (tdesc->features != NULL
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&& tdesc->arch != NULL
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&& tdesc->osabi != NULL));
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if (tdesc->xmltarget == NULL)
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{
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std::string buffer ("@<?xml version=\"1.0\"?>");
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buffer += "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">";
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buffer += "<target>";
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buffer += "<architecture>";
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buffer += tdesc->arch;
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buffer += "</architecture>";
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buffer += "<osabi>";
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buffer += tdesc->osabi;
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buffer += "</osabi>";
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char *xml;
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for (int i = 0; VEC_iterate (char_ptr, tdesc->features, i, xml); i++)
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{
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buffer += "<xi:include href=\"";
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buffer += xml;
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buffer += "\"/>";
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}
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buffer += "</target>";
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tdesc->xmltarget = xstrdup (buffer.c_str ());
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}
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return tdesc->xmltarget;
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}
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#endif
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struct tdesc_type
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@ -69,8 +125,12 @@ struct tdesc_type
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/* See arch/tdesc.h. */
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struct tdesc_feature *
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tdesc_create_feature (struct target_desc *tdesc, const char *name)
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tdesc_create_feature (struct target_desc *tdesc, const char *name,
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const char *xml)
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{
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#ifndef IN_PROCESS_AGENT
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VEC_safe_push (char_ptr, tdesc->features, xstrdup (xml));
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#endif
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return tdesc;
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}
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@ -49,9 +49,21 @@ struct target_desc : tdesc_feature
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/* Defines what to return when looking for the "target.xml" file in
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response to qXfer:features:read. Its contents can either be
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verbatim XML code (prefixed with a '@') or else the name of the
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actual XML file to be used in place of "target.xml". */
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actual XML file to be used in place of "target.xml".
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It can be NULL, then, its content is got from the following three
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fields features, arch, and osabi in tdesc_get_features_xml. */
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const char *xmltarget = NULL;
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/* XML features in this target description. */
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VEC (char_ptr) *features = NULL;
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/* The value of <architecture> element in the XML, replying GDB. */
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const char *arch = NULL;
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/* The value of <osabi> element in the XML, replying GDB. */
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const char *osabi = NULL;
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public:
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target_desc ()
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: reg_defs (NULL), registers_size (0)
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@ -65,6 +77,15 @@ public:
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for (i = 0; VEC_iterate (tdesc_reg_p, reg_defs, i, reg); i++)
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xfree (reg);
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VEC_free (tdesc_reg_p, reg_defs);
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xfree ((char *) arch);
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xfree ((char *) osabi);
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char *f;
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for (i = 0; VEC_iterate (char_ptr, features, i, f); i++)
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xfree (f);
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VEC_free (char_ptr, features);
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}
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bool operator== (const target_desc &other) const
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@ -96,9 +117,6 @@ public:
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if (other.expedite_regs[i] != NULL)
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return false;
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if (strcmp (xmltarget, other.xmltarget) != 0)
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return false;
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return true;
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}
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@ -123,4 +141,12 @@ void init_target_desc (struct target_desc *tdesc);
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const struct target_desc *current_target_desc (void);
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#ifndef IN_PROCESS_AGENT
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void set_tdesc_architecture (struct target_desc *target_desc,
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const char *name);
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void set_tdesc_osabi (struct target_desc *target_desc, const char *name);
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const char *tdesc_get_features_xml (struct target_desc *tdesc);
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#endif
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#endif /* TDESC_H */
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@ -1750,7 +1750,8 @@ tdesc_add_enum_value (struct tdesc_type *type, int value,
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/* See arch/tdesc.h. */
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struct tdesc_feature *
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tdesc_create_feature (struct target_desc *tdesc, const char *name)
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tdesc_create_feature (struct target_desc *tdesc, const char *name,
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const char *xml)
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{
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struct tdesc_feature *new_feature = new tdesc_feature (name);
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@ -2202,8 +2203,10 @@ public:
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printf_unfiltered ("{\n");
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printf_unfiltered (" struct tdesc_feature *feature;\n");
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printf_unfiltered ("\n feature = tdesc_create_feature (result, \"%s\");\n",
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e->name);
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printf_unfiltered
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("\n feature = tdesc_create_feature (result, \"%s\", \"%s\");\n",
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e->name, lbasename (m_filename_after_features.c_str ()));
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}
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void visit_post (const tdesc_feature *e) override
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